#include "HGImgThumb.h"
#include <QMouseEvent>
#include <QPainter>
#include <QKeyEvent>
#include <QGuiApplication>
#include <QContextMenuEvent>
#include <QApplication>
#include <QDrag>
#include <QMimeData>
#include <QFileInfo>
#include <QMessageBox>
#include "base/HGInc.h"
#include "base/HGUtility.h"
#include "imgfmt/HGImgFmt.h"
#include "HGUIGlobal.h"


HGImgThumb::HGImgThumb(QWidget* parent)
    : QWidget(parent)
{
    HGBase_CreateLock(&m_lockFront);
    HGBase_CreateLock(&m_lockBack);
    HGBase_CreateLock(&m_lockItemSize);
    HGBase_CreateEvent(HGFALSE, HGFALSE, &m_event);

    m_gapSize = 10;
    m_scrollSize = 10;
    m_minScrollSliderSize = 8;
    m_itemSize = 120;
    m_itemTextHeight = 20;
    m_defItemImage = nullptr;
    m_itemImage = nullptr;
    for (int i = 0; i < 3; ++i)
    {
        m_hScrollLeftImage[i] = nullptr;
        m_hScrollRightImage[i] = nullptr;
        m_vScrollTopImage[i] = nullptr;
        m_vScrollBottomImage[i] = nullptr;
        m_hScrollSliderImage[i] = nullptr;
        m_vScrollSliderImage[i] = nullptr;
    }
    m_hScrollImage = nullptr;
    m_vScrollImage = nullptr;
    m_nullScrollImage = nullptr;
    m_type = ThumbType_Grid;

    m_mouseOn = false;
    m_curItemIndex = -1;
    m_hotItemIndex = -1;
    m_pushItemIndex = -1;
    m_signItemIndex = -1;
    m_stopThread = false;
    HGBase_OpenThread(ThreadFunc, this, &m_thread);
    m_hScroll = false;
    m_vScroll = false;
    m_showThumb = false;
    memset(&m_thumbRect, 0, sizeof(ThumbRect));
    m_mouseMoveStatus = MouseStatus_Null;
    m_mousePressStatus = MouseStatus_Null;
    m_mousePressBeginX = -1;
    m_mousePressBeginY = -1;
    m_hitMouseButtons = Qt::NoButton;
    m_hitKeyboardModifiers = Qt::NoModifier;
    m_hitItemIndex = -1;
    m_operate = 0;
    m_operateStartX = -1;
    m_operateStartY = -1;
    m_draging = false;
    m_insertPtValid = false;
    m_curInsertPos = -1;
    m_frameSelection = false;
    m_frameSelectionRectValid = false;

    setFocusPolicy(Qt::ClickFocus);
    setMouseTracking(true);
    setAcceptDrops(true);
    connect(this, SIGNAL(updateItem()), this, SLOT(on_updateItem()), Qt::QueuedConnection);
}

HGImgThumb::~HGImgThumb()
{
    removeAllItems(ThumbRemoveFlag::ThumbRemoveFlag_NULL);

    m_stopThread = true;
    HGBase_SetEvent(m_event);
    HGBase_CloseThread(m_thread);
    m_thread = nullptr;

    delete m_hScrollImage;
    m_hScrollImage = nullptr;
    delete m_vScrollImage;
    m_vScrollImage = nullptr;
    delete m_nullScrollImage;
    m_nullScrollImage = nullptr;
    for (int i = 0; i < 3; ++i)
    {
        delete m_hScrollLeftImage[i];
        m_hScrollLeftImage[i] = nullptr;
        delete m_hScrollRightImage[i];
        m_hScrollRightImage[i] = nullptr;
        delete m_vScrollTopImage[i];
        m_vScrollTopImage[i] = nullptr;
        delete m_vScrollBottomImage[i];
        m_vScrollBottomImage[i] = nullptr;
        delete m_hScrollSliderImage[i];
        m_hScrollSliderImage[i] = nullptr;
        delete m_vScrollSliderImage[i];
        m_vScrollSliderImage[i] = nullptr;
    }
    delete m_itemImage;
    m_itemImage = nullptr;
    delete m_defItemImage;
    m_defItemImage = nullptr;

    HGBase_DestroyEvent(m_event);
    m_event = nullptr;
    HGBase_DestroyLock(m_lockItemSize);
    m_lockItemSize = nullptr;
    HGBase_DestroyLock(m_lockBack);
    m_lockBack = nullptr;
    HGBase_DestroyLock(m_lockFront);
    m_lockFront = nullptr;

    qDebug("~HGImgThumb");
}

HGResult HGImgThumb::setGapSize(int size)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (size < 0 || size > 40)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    m_gapSize = size;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setScrollSize(int size)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (size < 10 || size > 20)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    m_scrollSize = size;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setMinScrollSliderSize(int size)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (size < 8 || size > 64)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    m_minScrollSliderSize = size;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setItemSize(int size)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (size < 60 || size > 240)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (m_itemSize == size)
    {
        return HGBASE_ERR_OK;
    }

    HGBase_EnterLock(m_lockItemSize);
    m_itemSize = size;
    HGBase_LeaveLock(m_lockItemSize);
    if (nullptr != m_defItemImage)
    {
        assert(nullptr != m_itemImage);
        delete m_itemImage;
        m_itemImage = createItemImage(m_defItemImage, m_itemSize);
        assert(nullptr != m_itemImage);
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setItemTextHeight(int height)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (height < 0 || height > 40)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    m_itemTextHeight = height;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setDefItemImage(const QImage *image)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == image)
    {
        delete m_itemImage;
        m_itemImage = nullptr;
        delete m_defItemImage;
        m_defItemImage = nullptr;
        return HGBASE_ERR_OK;
    }

    QImage *img = new QImage(*image);
    if (img->isNull())
    {
        delete img;
        return HGBASE_ERR_FAIL;
    }

    if (nullptr != m_defItemImage)
    {
        assert(nullptr != m_itemImage);
        delete m_itemImage;
        delete m_defItemImage;
    }
    else
    {
        assert(nullptr == m_itemImage);
    }

    m_defItemImage = img;
    m_itemImage = createItemImage(m_defItemImage, m_itemSize);
    assert(nullptr != m_itemImage);
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setHScrollLeftImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_hScrollLeftImage[0];
        m_hScrollLeftImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollLeftImage[0])
                delete m_hScrollLeftImage[0];
            m_hScrollLeftImage[0] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_hScrollLeftImage[1];
        m_hScrollLeftImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollLeftImage[1])
                delete m_hScrollLeftImage[1];
            m_hScrollLeftImage[1] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_hScrollLeftImage[2];
        m_hScrollLeftImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollLeftImage[2])
                delete m_hScrollLeftImage[2];
            m_hScrollLeftImage[2] = img;
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setHScrollRightImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_hScrollRightImage[0];
        m_hScrollRightImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollRightImage[0])
                delete m_hScrollRightImage[0];
            m_hScrollRightImage[0] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_hScrollRightImage[1];
        m_hScrollRightImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollRightImage[1])
                delete m_hScrollRightImage[1];
            m_hScrollRightImage[1] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_hScrollRightImage[2];
        m_hScrollRightImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollRightImage[2])
                delete m_hScrollRightImage[2];
            m_hScrollRightImage[2] = img;
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setVScrollTopImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_vScrollTopImage[0];
        m_vScrollTopImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollTopImage[0])
                delete m_vScrollTopImage[0];
            m_vScrollTopImage[0] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_vScrollTopImage[1];
        m_vScrollTopImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollTopImage[1])
                delete m_vScrollTopImage[1];
            m_vScrollTopImage[1] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_vScrollTopImage[2];
        m_vScrollTopImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollTopImage[2])
                delete m_vScrollTopImage[2];
            m_vScrollTopImage[2] = img;
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setVScrollBottomImage(const QImage *normalImage, const QImage *hotImage, const QImage *pushImage)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_vScrollBottomImage[0];
        m_vScrollBottomImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollBottomImage[0])
                delete m_vScrollBottomImage[0];
            m_vScrollBottomImage[0] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_vScrollBottomImage[1];
        m_vScrollBottomImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollBottomImage[1])
                delete m_vScrollBottomImage[1];
            m_vScrollBottomImage[1] = img;
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_vScrollBottomImage[2];
        m_vScrollBottomImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollBottomImage[2])
                delete m_vScrollBottomImage[2];
            m_vScrollBottomImage[2] = img;
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setHScrollImage(const QImage *image, const HGRect *stretch)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == image)
    {
        delete m_hScrollImage;
        m_hScrollImage = nullptr;
    }
    else
    {
        QImage *img = new QImage(*image);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollImage)
                delete m_hScrollImage;
            m_hScrollImage = img;

            if (nullptr == stretch || stretch->left < 0 || stretch->top < 0
                    || stretch->right > m_hScrollImage->width() || stretch->bottom > m_hScrollImage->height()
                    || stretch->left >= stretch->right || stretch->top >= stretch->bottom)
            {
                m_hScrollImageStretch.setX(0);
                m_hScrollImageStretch.setY(0);
                m_hScrollImageStretch.setWidth(m_hScrollImage->width());
                m_hScrollImageStretch.setHeight(m_hScrollImage->height());
            }
            else
            {
                m_hScrollImageStretch.setX(stretch->left);
                m_hScrollImageStretch.setY(stretch->top);
                m_hScrollImageStretch.setWidth(stretch->right - stretch->left);
                m_hScrollImageStretch.setHeight(stretch->bottom - stretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setHScrollSliderImage(const QImage *normalImage, const HGRect *normalStretch, const QImage *hotImage, const HGRect *hotStretch,
    const QImage *pushImage, const HGRect *pushStretch)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_hScrollSliderImage[0];
        m_hScrollSliderImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollSliderImage[0])
                delete m_hScrollSliderImage[0];
            m_hScrollSliderImage[0] = img;

            if (nullptr == normalStretch || normalStretch->left < 0 || normalStretch->top < 0
                    || normalStretch->right > m_hScrollSliderImage[0]->width() || normalStretch->bottom > m_hScrollSliderImage[0]->height()
                    || normalStretch->left >= normalStretch->right || normalStretch->top >= normalStretch->bottom)
            {
                m_hScrollSliderImageStretch[0].setX(0);
                m_hScrollSliderImageStretch[0].setY(0);
                m_hScrollSliderImageStretch[0].setWidth(m_hScrollSliderImage[0]->width());
                m_hScrollSliderImageStretch[0].setHeight(m_hScrollSliderImage[0]->height());
            }
            else
            {
                m_hScrollSliderImageStretch[0].setX(normalStretch->left);
                m_hScrollSliderImageStretch[0].setY(normalStretch->top);
                m_hScrollSliderImageStretch[0].setWidth(normalStretch->right - normalStretch->left);
                m_hScrollSliderImageStretch[0].setHeight(normalStretch->bottom - normalStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_hScrollSliderImage[1];
        m_hScrollSliderImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollSliderImage[1])
                delete m_hScrollSliderImage[1];
            m_hScrollSliderImage[1] = img;

            if (nullptr == hotStretch || hotStretch->left < 0 || hotStretch->top < 0
                    || hotStretch->right > m_hScrollSliderImage[1]->width() || hotStretch->bottom > m_hScrollSliderImage[1]->height()
                    || hotStretch->left >= hotStretch->right || hotStretch->top >= hotStretch->bottom)
            {
                m_hScrollSliderImageStretch[1].setX(0);
                m_hScrollSliderImageStretch[1].setY(0);
                m_hScrollSliderImageStretch[1].setWidth(m_hScrollSliderImage[1]->width());
                m_hScrollSliderImageStretch[1].setHeight(m_hScrollSliderImage[1]->height());
            }
            else
            {
                m_hScrollSliderImageStretch[1].setX(hotStretch->left);
                m_hScrollSliderImageStretch[1].setY(hotStretch->top);
                m_hScrollSliderImageStretch[1].setWidth(hotStretch->right - hotStretch->left);
                m_hScrollSliderImageStretch[1].setHeight(hotStretch->bottom - hotStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_hScrollSliderImage[2];
        m_hScrollSliderImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_hScrollSliderImage[2])
                delete m_hScrollSliderImage[2];
            m_hScrollSliderImage[2] = img;

            if (nullptr == pushStretch || pushStretch->left < 0 || pushStretch->top < 0
                    || pushStretch->right > m_hScrollSliderImage[2]->width() || pushStretch->bottom > m_hScrollSliderImage[2]->height()
                    || pushStretch->left >= pushStretch->right || pushStretch->top >= hotStretch->bottom)
            {
                m_hScrollSliderImageStretch[2].setX(0);
                m_hScrollSliderImageStretch[2].setY(0);
                m_hScrollSliderImageStretch[2].setWidth(m_hScrollSliderImage[2]->width());
                m_hScrollSliderImageStretch[2].setHeight(m_hScrollSliderImage[2]->height());
            }
            else
            {
                m_hScrollSliderImageStretch[2].setX(pushStretch->left);
                m_hScrollSliderImageStretch[2].setY(pushStretch->top);
                m_hScrollSliderImageStretch[2].setWidth(pushStretch->right - pushStretch->left);
                m_hScrollSliderImageStretch[2].setHeight(pushStretch->bottom - pushStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setVScrollImage(const QImage *image, const HGRect *stretch)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == image)
    {
        delete m_vScrollImage;
        m_vScrollImage = nullptr;
    }
    else
    {
        QImage *img = new QImage(*image);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollImage)
                delete m_vScrollImage;
            m_vScrollImage = img;

            if (nullptr == stretch || stretch->left < 0 || stretch->top < 0
                    || stretch->right > m_vScrollImage->width() || stretch->bottom > m_vScrollImage->height()
                    || stretch->left >= stretch->right || stretch->top >= stretch->bottom)
            {
                m_vScrollImageStretch.setX(0);
                m_vScrollImageStretch.setY(0);
                m_vScrollImageStretch.setWidth(m_vScrollImage->width());
                m_vScrollImageStretch.setHeight(m_vScrollImage->height());
            }
            else
            {
                m_vScrollImageStretch.setX(stretch->left);
                m_vScrollImageStretch.setY(stretch->top);
                m_vScrollImageStretch.setWidth(stretch->right - stretch->left);
                m_vScrollImageStretch.setHeight(stretch->bottom - stretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setVScrollSliderImage(const QImage *normalImage, const HGRect *normalStretch, const QImage *hotImage, const HGRect *hotStretch,
    const QImage *pushImage, const HGRect *pushStretch)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == normalImage)
    {
        delete m_vScrollSliderImage[0];
        m_vScrollSliderImage[0] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*normalImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollSliderImage[0])
                delete m_vScrollSliderImage[0];
            m_vScrollSliderImage[0] = img;

            if (nullptr == normalStretch || normalStretch->left < 0 || normalStretch->top < 0
                    || normalStretch->right > m_vScrollSliderImage[0]->width() || normalStretch->bottom > m_vScrollSliderImage[0]->height()
                    || normalStretch->left >= normalStretch->right || normalStretch->top >= normalStretch->bottom)
            {
                m_vScrollSliderImageStretch[0].setX(0);
                m_vScrollSliderImageStretch[0].setY(0);
                m_vScrollSliderImageStretch[0].setWidth(m_vScrollSliderImage[0]->width());
                m_vScrollSliderImageStretch[0].setHeight(m_vScrollSliderImage[0]->height());
            }
            else
            {
                m_vScrollSliderImageStretch[0].setX(normalStretch->left);
                m_vScrollSliderImageStretch[0].setY(normalStretch->top);
                m_vScrollSliderImageStretch[0].setWidth(normalStretch->right - normalStretch->left);
                m_vScrollSliderImageStretch[0].setHeight(normalStretch->bottom - normalStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == hotImage)
    {
        delete m_vScrollSliderImage[1];
        m_vScrollSliderImage[1] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*hotImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollSliderImage[1])
                delete m_vScrollSliderImage[1];
            m_vScrollSliderImage[1] = img;

            if (nullptr == hotStretch || hotStretch->left < 0 || hotStretch->top < 0
                    || hotStretch->right > m_vScrollSliderImage[1]->width() || hotStretch->bottom > m_vScrollSliderImage[1]->height()
                    || hotStretch->left >= hotStretch->right || hotStretch->top >= hotStretch->bottom)
            {
                m_vScrollSliderImageStretch[1].setX(0);
                m_vScrollSliderImageStretch[1].setY(0);
                m_vScrollSliderImageStretch[1].setWidth(m_vScrollSliderImage[1]->width());
                m_vScrollSliderImageStretch[1].setHeight(m_vScrollSliderImage[1]->height());
            }
            else
            {
                m_vScrollSliderImageStretch[1].setX(hotStretch->left);
                m_vScrollSliderImageStretch[1].setY(hotStretch->top);
                m_vScrollSliderImageStretch[1].setWidth(hotStretch->right - hotStretch->left);
                m_vScrollSliderImageStretch[1].setHeight(hotStretch->bottom - hotStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    if (nullptr == pushImage)
    {
        delete m_vScrollSliderImage[2];
        m_vScrollSliderImage[2] = nullptr;
    }
    else
    {
        QImage *img = new QImage(*pushImage);
        if (!img->isNull())
        {
            if (nullptr != m_vScrollSliderImage[2])
                delete m_vScrollSliderImage[2];
            m_vScrollSliderImage[2] = img;

            if (nullptr == pushStretch || pushStretch->left < 0 || pushStretch->top < 0
                    || pushStretch->right > m_vScrollSliderImage[2]->width() || pushStretch->bottom > m_vScrollSliderImage[2]->height()
                    || pushStretch->left >= pushStretch->right || pushStretch->top >= hotStretch->bottom)
            {
                m_vScrollSliderImageStretch[2].setX(0);
                m_vScrollSliderImageStretch[2].setY(0);
                m_vScrollSliderImageStretch[2].setWidth(m_vScrollSliderImage[2]->width());
                m_vScrollSliderImageStretch[2].setHeight(m_vScrollSliderImage[2]->height());
            }
            else
            {
                m_vScrollSliderImageStretch[2].setX(pushStretch->left);
                m_vScrollSliderImageStretch[2].setY(pushStretch->top);
                m_vScrollSliderImageStretch[2].setWidth(pushStretch->right - pushStretch->left);
                m_vScrollSliderImageStretch[2].setHeight(pushStretch->bottom - pushStretch->top);
            }
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setNullScrollImage(const QImage *image)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 != m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    if (nullptr == image)
    {
        delete m_nullScrollImage;
        m_nullScrollImage = nullptr;
    }
    else
    {
        QImage *img = new QImage(*image);
        if (!img->isNull())
        {
            if (nullptr != m_nullScrollImage)
                delete m_nullScrollImage;
            m_nullScrollImage = img;
        }
        else
        {
            delete img;
        }
    }

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setType(ThumbType type)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (m_type == type)
    {
        return HGBASE_ERR_OK;
    }

    m_type = type;

    int showWidth = 0, showHeight = 0;
    calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
        showWidth, showHeight, m_hScroll, m_vScroll);
    m_showThumb = false;
    memset(&m_thumbRect, 0, sizeof(ThumbRect));
    if (showWidth > 0 && showHeight > 0)
    {
        m_showThumb = true;
        m_thumbRect.left = 0;
        m_thumbRect.top = 0;
        m_thumbRect.right = (double)showWidth;
        m_thumbRect.bottom = (double)showHeight;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::zoomIn()
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 == m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    assert(m_showThumb);

    int itemSize = (int)((float)m_itemSize * 1.2f);
    int newItemSize = HGMIN(240, HGMAX(60, itemSize));
    if (m_itemSize == newItemSize)
    {
        return HGBASE_ERR_FAIL;
    }

    HGBase_EnterLock(m_lockItemSize);
    m_itemSize = newItemSize;
    HGBase_LeaveLock(m_lockItemSize);
    if (nullptr != m_defItemImage)
    {
        assert(nullptr != m_itemImage);
        delete m_itemImage;
        m_itemImage = createItemImage(m_defItemImage, m_itemSize);
        assert(nullptr != m_itemImage);
    }

    int showWidth = 0, showHeight = 0;
    calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
        showWidth, showHeight, m_hScroll, m_vScroll);
    assert(showWidth > 0 && showHeight > 0);
    m_thumbRect.right = m_thumbRect.left + (double)showWidth;
    m_thumbRect.bottom = m_thumbRect.top + (double)showHeight;
    recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    HGBase_EnterLock(m_lockBack);
    m_backList.clear();
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        m_backList.push_back(m_frontItems[i]->fileName);
    }
    HGBase_LeaveLock(m_lockBack);
    HGBase_SetEvent(m_event);

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::zoomOut()
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (0 == m_frontItems.size())
    {
        return HGBASE_ERR_FAIL;
    }

    assert(m_showThumb);

    int itemSize = (int)((float)m_itemSize * 1.0f / 1.2f);
    int newItemSize = HGMIN(240, HGMAX(60, itemSize));
    if (m_itemSize == newItemSize)
    {
        return HGBASE_ERR_FAIL;
    }

    HGBase_EnterLock(m_lockItemSize);
    m_itemSize = newItemSize;
    HGBase_LeaveLock(m_lockItemSize);
    if (nullptr != m_defItemImage)
    {
        assert(nullptr != m_itemImage);
        delete m_itemImage;
        m_itemImage = createItemImage(m_defItemImage, m_itemSize);
        assert(nullptr != m_itemImage);
    }

    int showWidth = 0, showHeight = 0;
    calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
        showWidth, showHeight, m_hScroll, m_vScroll);
    assert(showWidth > 0 && showHeight > 0);
    m_thumbRect.right = m_thumbRect.left + (double)showWidth;
    m_thumbRect.bottom = m_thumbRect.top + (double)showHeight;
    recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    HGBase_EnterLock(m_lockBack);
    m_backList.clear();
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        m_backList.push_back(m_frontItems[i]->fileName);
    }
    HGBase_LeaveLock(m_lockBack);
    HGBase_SetEvent(m_event);

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::getItemCount(int *count)
{
    if (nullptr == count)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    *count = (int)m_frontItems.size();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::addItem(const QString &fileName)
{
    QStringList fileNames;
    fileNames.append(fileName);
    return addItems(fileNames);
}

HGResult HGImgThumb::addItems(const QStringList &fileNames)
{
    return insertItems(fileNames, (int)m_frontItems.size(), true);
}

HGResult HGImgThumb::insertItem(const QString &fileName, int pos)
{
    QStringList fileNames;
    fileNames.append(fileName);
    return insertItems(fileNames, pos);
}

HGResult HGImgThumb::insertItems(const QStringList &fileNames, int pos, bool append)
{
    if (pos < 0 || pos > (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    bool findInThumb = false;
    std::vector<QString> stdFileNames;
    for (int i = 0; i < (int)fileNames.size(); ++i)
    {
        QString stdFileName = getStdFileName(fileNames[i]);
        QFileInfo fileInfo(stdFileName);
        if (!fileInfo.isFile())
        {
            continue;
        }

        bool find = false;
        for (int j = 0; j < (int)stdFileNames.size(); ++j)
        {
            if (stdFileNames[j] == stdFileName)
            {
                find = true;
                break;
            }
        }

        if (!find)
        {
            HGUInt fmtType = 0;
            HGImgFmt_GetImgFmtTypeFromFileName(getStdString(stdFileName).c_str(), &fmtType);
            if (0 != fmtType)
            {
                if (!findInThumb)
                {
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (m_frontItems[i]->fileName == stdFileName)
                        {
                            findInThumb = true;
                            break;
                        }
                    }
                }

                stdFileNames.push_back(stdFileName);
            }
        }
    }

    if (stdFileNames.empty())
    {
        if (!fileNames.empty())
        {
            QMessageBox::information(this, tr("tips"), tr("unsupported file format"));
        }

        return HGBASE_ERR_INVALIDARG;
    }

    bool isMove = false;
    if (findInThumb)
    {
        if (1 == stdFileNames.size())
        {
            int index = findIndex(stdFileNames[0]);
            assert(-1 != index);

            if (pos == index || pos == index + 1)
            {
                QMessageBox::information(this, tr("tips"), tr("file have been loaded"));
            }
            else
            {
                QString info = append ? tr("file have been loaded, do you want to move to end?")
                    : tr("file have been loaded, do you want to move to specified location?");
                QMessageBox msg(QMessageBox::Question, tr("Question"),
                                info,
                                QMessageBox::Yes | QMessageBox::No, this);
                msg.setButtonText(QMessageBox::Yes, tr("yes"));
                msg.setButtonText(QMessageBox::No, tr("no"));
                msg.exec();
                if (msg.clickedButton() == msg.button(QMessageBox::Yes))
                {
                    isMove = true;
                }
            }
        }
        else
        {
            QString info = append ? tr("some files have been loaded, do you want to move to end?")
                : tr("some files have been loaded, do you want to move to specified location?");
            QMessageBox msg(QMessageBox::Question, tr("Question"),
                            info,
                            QMessageBox::Yes | QMessageBox::No, this);
            msg.setButtonText(QMessageBox::Yes, tr("yes"));
            msg.setButtonText(QMessageBox::No, tr("no"));
            msg.exec();
            if (msg.clickedButton() == msg.button(QMessageBox::Yes))
            {
                isMove = true;
            }
        }
    }

    reset();

    int oldItemCount = (int)m_frontItems.size();
    int oldCurrItemIndex = m_curItemIndex;
    QString oldCurrItemFilePath;
    if (-1 != oldCurrItemIndex)
        oldCurrItemFilePath = m_frontItems[oldCurrItemIndex]->fileName;

    std::vector<int> oldSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            oldSelectedIndexs.push_back(i);
        m_frontItems[i]->selected = false;
    }

    int posEx = pos;

    for (int i = 0; i < (int)stdFileNames.size(); ++i)
    {
        const QString &stdFileName = stdFileNames[i];
        int oldIndex = findIndex(stdFileName);
        if (-1 == oldIndex)
        {
            HGImgThumbItem *item = new HGImgThumbItem;
            item->fileName = stdFileName;
            item->selected = true;

            HGBase_EnterLock(m_lockFront);
            item->selected = true;
            if (posEx != (int)m_frontItems.size())
                m_frontItems.insert(m_frontItems.begin() + posEx, item);
            else
                m_frontItems.push_back(item);
            HGBase_LeaveLock(m_lockFront);

            HGBase_EnterLock(m_lockBack);
            m_backList.push_back(stdFileName);
            HGBase_LeaveLock(m_lockBack);
            HGBase_SetEvent(m_event);

            ++posEx;
        }
        else
        {
            if (isMove)
            {
                HGImgThumbItem *item = m_frontItems[oldIndex];
                item->selected = true;

                if (oldIndex < posEx)
                {
                    if (pos == posEx)
                    {
                        --pos;
                    }

                    --posEx;
                }

                HGBase_EnterLock(m_lockFront);
                m_frontItems.erase(m_frontItems.begin() + oldIndex);
                if (posEx != (int)m_frontItems.size())
                    m_frontItems.insert(m_frontItems.begin() + posEx, item);
                else
                    m_frontItems.push_back(item);
                HGBase_LeaveLock(m_lockFront);

                ++posEx;
            }
            else
            {
                m_frontItems[oldIndex]->selected = true;
                m_curItemIndex = oldIndex;
                m_signItemIndex = oldIndex;
                locateItem(oldIndex);
                recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
            }
        }
    }

    if (pos != posEx)
    {
        m_curItemIndex = posEx - 1;
        m_signItemIndex = posEx - 1;

        int showWidth = 0, showHeight = 0;
        calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
            showWidth, showHeight, m_hScroll, m_vScroll);
        assert(showWidth > 0 && showHeight > 0);
        m_showThumb = true;
        m_thumbRect.right = m_thumbRect.left + (double)showWidth;
        m_thumbRect.bottom = m_thumbRect.top + (double)showHeight;
        locateItem(posEx - 1);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    int newItemCount = (int)m_frontItems.size();
    int newCurrItemIndex = m_curItemIndex;
    QString newCurrItemFilePath;
    if (-1 != newCurrItemIndex)
        newCurrItemFilePath = m_frontItems[newCurrItemIndex]->fileName;

    std::vector<int> newSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            newSelectedIndexs.push_back(i);
    }

    if (newItemCount != oldItemCount)
        emit itemCountChanged((int)m_frontItems.size());
    if (newCurrItemIndex != oldCurrItemIndex || newCurrItemFilePath != oldCurrItemFilePath)
        emit currItemChanged(m_curItemIndex);
    if (newSelectedIndexs != oldSelectedIndexs)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::moveItems(const QStringList &fileNames, int pos)
{
    if (pos < 0 || pos > (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    std::vector<QString> stdFileNames;
    for (int i = 0; i < (int)fileNames.size(); ++i)
    {
        QString stdFileName = getStdFileName(fileNames[i]);
        int oldIndex = findIndex(stdFileName);
        if (-1 == oldIndex)
        {
            continue;
        }

        bool find = false;
        for (int j = 0; j < (int)stdFileNames.size(); ++j)
        {
            if (stdFileNames[j] == stdFileName)
            {
                find = true;
                break;
            }
        }

        if (!find)
        {
            stdFileNames.push_back(stdFileName);
        }
    }

    if (stdFileNames.empty())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    reset();

    QString curItemFilePath;
    if (-1 != m_curItemIndex)
        curItemFilePath = m_frontItems[m_curItemIndex]->fileName;
    QString signItemFilePath;
    if (-1 != m_signItemIndex)
        signItemFilePath = m_frontItems[m_signItemIndex]->fileName;

    int oldCurItemIndex = m_curItemIndex;
    std::vector<int> oldSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            oldSelectedIndexs.push_back(i);
    }

    int posEx = pos;
    for (int i = 0; i < (int)stdFileNames.size(); ++i)
    {
        const QString &stdFileName = stdFileNames[i];
        int oldIndex = findIndex(stdFileName);
        assert(-1 != oldIndex);

        HGImgThumbItem *item = m_frontItems[oldIndex];

        if (oldIndex < posEx)
            --posEx;

        HGBase_EnterLock(m_lockFront);
        m_frontItems.erase(m_frontItems.begin() + oldIndex);
        if (posEx != (int)m_frontItems.size())
            m_frontItems.insert(m_frontItems.begin() + posEx, item);
        else
            m_frontItems.push_back(item);
        HGBase_LeaveLock(m_lockFront);

        ++posEx;
    }

    m_curItemIndex = findIndex(curItemFilePath);
    m_signItemIndex = findIndex(signItemFilePath);

    if (-1 != m_curItemIndex)
    {
        locateItem(m_curItemIndex);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    std::vector<int> newSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            newSelectedIndexs.push_back(i);
    }

    if (m_curItemIndex != oldCurItemIndex)
        emit currItemChanged(m_curItemIndex);
    if (newSelectedIndexs != oldSelectedIndexs)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::moveItemsTo(const QStringList &fileNames, int index)
{
    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    std::vector<QString> stdFileNames;
    for (int i = 0; i < (int)fileNames.size(); ++i)
    {
        QString stdFileName = getStdFileName(fileNames[i]);
        int oldIndex = findIndex(stdFileName);
        if (-1 == oldIndex)
        {
            continue;
        }

        bool find = false;
        for (int j = 0; j < (int)stdFileNames.size(); ++j)
        {
            if (stdFileNames[j] == stdFileName)
            {
                find = true;
                break;
            }
        }

        if (!find)
        {
            stdFileNames.push_back(stdFileName);
        }
    }

    if (stdFileNames.empty())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    reset();

    QString curItemFilePath;
    if (-1 != m_curItemIndex)
        curItemFilePath = m_frontItems[m_curItemIndex]->fileName;
    QString signItemFilePath;
    if (-1 != m_signItemIndex)
        signItemFilePath = m_frontItems[m_signItemIndex]->fileName;

    int oldCurItemIndex = m_curItemIndex;
    std::vector<int> oldSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            oldSelectedIndexs.push_back(i);
    }

    HGBase_EnterLock(m_lockFront);
    std::vector<HGImgThumbItem *> items;
    for (int i = 0; i < (int)stdFileNames.size(); ++i)
    {
        const QString &stdFileName = stdFileNames[i];
        int oldIndex = findIndex(stdFileName);
        assert(-1 != oldIndex);

        HGImgThumbItem *item = m_frontItems[oldIndex];
        m_frontItems.erase(m_frontItems.begin() + oldIndex);
        items.push_back(item);
    }

    if (index < (int)m_frontItems.size())
    {
        int indexEx = index;
        for (int i = 0; i < (int)items.size(); ++i)
        {
            m_frontItems.insert(m_frontItems.begin() + indexEx, items[i]);
            ++indexEx;
        }
    }
    else
    {
        for (int i = 0; i < (int)items.size(); ++i)
        {
            m_frontItems.push_back(items[i]);
        }
    }
    HGBase_LeaveLock(m_lockFront);

    m_curItemIndex = findIndex(curItemFilePath);
    m_signItemIndex = findIndex(signItemFilePath);

    locateItem(index);
    recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    std::vector<int> newSelectedIndexs;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            newSelectedIndexs.push_back(i);
    }

    if (m_curItemIndex != oldCurItemIndex)
        emit currItemChanged(m_curItemIndex);
    if (newSelectedIndexs != oldSelectedIndexs)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::getItemFileName(int index, QString &fileName)
{
    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    fileName = m_frontItems[index]->fileName;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::getCurrItem(int *index)
{
    if (nullptr == index)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    *index = m_curItemIndex;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::setCurrItem(int index)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    bool emitCurrItemChanged = false;
    bool emitSelectingChanged = false;

    if (m_curItemIndex != index)
    {
        emitCurrItemChanged = true;
        m_curItemIndex = index;
    }
    m_signItemIndex = index;

    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (i == index)
        {
            if (!m_frontItems[i]->selected)
                emitSelectingChanged = true;
            m_frontItems[i]->selected = true;
        }
        else
        {
            if (m_frontItems[i]->selected)
                emitSelectingChanged = true;
            m_frontItems[i]->selected = false;
        }
    }

    locateItem(index);
    recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    if (emitCurrItemChanged)
        emit currItemChanged(m_curItemIndex);
    if (emitSelectingChanged)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::resetCurrItem()
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    bool emitCurrItemChanged = false;
    bool emitSelectingChanged = false;

    if (m_curItemIndex != -1)
    {
        emitCurrItemChanged = true;
        m_curItemIndex = -1;
    }

    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_frontItems[i]->selected)
            emitSelectingChanged = true;
        m_frontItems[i]->selected = false;
    }

    Show();
    if (emitCurrItemChanged)
        emit currItemChanged(m_curItemIndex);
    if (emitSelectingChanged)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::removeItem(int index, ThumbRemoveFlag flag)
{
    std::vector<int> indexs;
    indexs.push_back(index);
    return removeItems(indexs, flag);
}

HGResult HGImgThumb::removeItems(const std::vector<int> &indexs, ThumbRemoveFlag flag)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    std::vector<int> indexs2;
    for (int i = 0; i < (int)indexs.size(); ++i)
    {
        if (indexs[i] < 0 || indexs[i] >= (int)m_frontItems.size())
        {
            return HGBASE_ERR_INVALIDARG;
        }

        bool find = false;
        for (int j = 0; j < (int)indexs2.size(); ++j)
        {
            if (indexs2[j] == indexs[i])
            {
                find = true;
                break;
            }
        }

        if (!find)
        {
            indexs2.push_back(indexs[i]);
        }
    }

    if (indexs2.empty())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    bool emitItemSelectingChange = false;
    bool emitCurrItemChange = false;

    for (int i = 0; i < (int)indexs2.size(); ++i)
    {
        int index = indexs2[i];
        if (m_frontItems[index]->selected)
            emitItemSelectingChange = true;

        HGBase_EnterLock(m_lockBack);
        std::list<QString>::iterator iter;
        for (iter = m_backList.begin(); iter != m_backList.end(); ++iter)
        {
            if (0 == (*iter).compare(m_frontItems[index]->fileName))
            {
                m_backList.erase(iter);
                break;
            }
        }
        HGBase_LeaveLock(m_lockBack);

        if (flag == ThumbRemoveFlag_AllowUndo)
            ;
        else if (flag == ThumbRemoveFlag_Delete)
            QFile::remove(m_frontItems[index]->fileName);

        HGBase_EnterLock(m_lockFront);
        delete m_frontItems[index];
        m_frontItems.erase(m_frontItems.begin() + index);
        HGBase_LeaveLock(m_lockFront);

        if (m_curItemIndex == index)
        {
            m_curItemIndex = -1;
            emitCurrItemChange = true;
        }
        else if (m_curItemIndex > index)
        {
            --m_curItemIndex;
            emitCurrItemChange = true;
        }

        if (m_signItemIndex == index)
            m_signItemIndex = -1;
        else if (m_signItemIndex > index)
            --m_signItemIndex;

        for (int j = i + 1; j < (int)indexs2.size(); ++j)
        {
            if (indexs2[j] > index)
            {
                --indexs2[j];
            }
        }
    }

    int showWidth = 0, showHeight = 0;
    calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
        showWidth, showHeight, m_hScroll, m_vScroll);
    if (showWidth <= 0 || showHeight <= 0)
    {
        m_showThumb = false;
        memset(&m_thumbRect, 0, sizeof(ThumbRect));
    }
    else
    {
        m_thumbRect.right = m_thumbRect.left + (double)showWidth;
        m_thumbRect.bottom = m_thumbRect.top + (double)showHeight;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    emit itemCountChanged((int)m_frontItems.size());
    if (emitCurrItemChange)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChange)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::removeAllItems(ThumbRemoveFlag flag)
{
    if (m_frontItems.empty())
    {
        return HGBASE_ERR_OK;
    }

    reset();

    bool emitItemSelectingChange = false;

    HGBase_EnterLock(m_lockBack);
    m_backList.clear();
    HGBase_LeaveLock(m_lockBack);

    while (!m_frontItems.empty())
    {
        if (m_frontItems[0]->selected)
            emitItemSelectingChange = true;

        if (flag == ThumbRemoveFlag_AllowUndo)
            ;
        else if (flag == ThumbRemoveFlag_Delete)
            QFile::remove(m_frontItems[0]->fileName);

        HGBase_EnterLock(m_lockFront);
        delete m_frontItems[0];
        m_frontItems.erase(m_frontItems.begin());
        HGBase_LeaveLock(m_lockFront);
    }

    bool emitItemChange = false;
    if (-1 != m_curItemIndex)
    {
        m_curItemIndex = -1;
        emitItemChange = true;
    }

    m_signItemIndex = -1;

    m_hScroll = false;
    m_vScroll = false;
    m_showThumb = false;
    memset(&m_thumbRect, 0, sizeof(ThumbRect));
    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    emit itemCountChanged((int)m_frontItems.size());
    if (emitItemChange)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChange)
        emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::bookSort()
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    int oldCurItemIndex = m_curItemIndex;

    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_curItemIndex == i)
        {
            if (0 == i % 2)
                m_curItemIndex = i / 2;
            else
                m_curItemIndex = (int)m_frontItems.size() - (i + 1) / 2;
            break;
        }
    }

    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (m_signItemIndex == i)
        {
            if (0 == i % 2)
                m_signItemIndex = i / 2;
            else
                m_signItemIndex = (int)m_frontItems.size() - (i + 1) / 2;
            break;
        }
    }

    std::list<HGImgThumbItem *> items1, items2;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        HGImgThumbItem *item = m_frontItems[i];
        if (0 == i % 2)
            items1.push_back(item);
        else
            items2.push_front(item);
    }

    HGBase_EnterLock(m_lockFront);
    m_frontItems.clear();
    std::list<HGImgThumbItem *>::const_iterator iter;
    for (iter = items1.begin(); iter != items1.end(); ++iter)
        m_frontItems.push_back(*iter);
    for (iter = items2.begin(); iter != items2.end(); ++iter)
        m_frontItems.push_back(*iter);
    HGBase_LeaveLock(m_lockFront);

    if (-1 != m_curItemIndex)
    {
        locateItem(m_curItemIndex);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    if (oldCurItemIndex != m_curItemIndex)
        emit currItemChanged(m_curItemIndex);

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::selectItem(int index, bool select)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    if (m_frontItems[index]->selected == select)
    {
        return HGBASE_ERR_OK;
    }

    m_frontItems[index]->selected = select;
    Show();
    emit itemSelectingChanged();
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::itemIsSelect(int index, bool *select)
{
    if (index < 0 || index >= (int)m_frontItems.size() || nullptr == select)
    {
        return HGBASE_ERR_INVALIDARG;
    }

    *select = m_frontItems[index]->selected;
    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::updateItem(int index, const QString &fileName)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    QString stdFileName = getStdFileName(fileName);
    QFileInfo fileInfo(stdFileName);
    if (!fileInfo.isFile())
    {
        return HGBASE_ERR_FAIL;
    }

    if (-1 != findIndex(stdFileName))
    {
        return HGBASE_ERR_FAIL;
    }

    QString oldFileName = m_frontItems[index]->fileName;
    m_frontItems[index]->fileName = stdFileName;

    HGBase_EnterLock(m_lockBack);
    std::list<QString>::iterator iter;
    for (iter = m_backList.begin(); iter != m_backList.end(); ++iter)
    {
        if (0 == (*iter).compare(oldFileName))
        {
            m_backList.erase(iter);
            break;
        }
    }
    m_backList.push_front(stdFileName);
    HGBase_LeaveLock(m_lockBack);
    HGBase_SetEvent(m_event);

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::refreshItem(int index)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    if (index < 0 || index >= (int)m_frontItems.size())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    QString fileName = m_frontItems[index]->fileName;

    HGBase_EnterLock(m_lockBack);
    std::list<QString>::iterator iter;
    for (iter = m_backList.begin(); iter != m_backList.end(); ++iter)
    {
        if (0 == (*iter).compare(fileName))
        {
            m_backList.erase(iter);
            break;
        }
    }
    m_backList.push_front(fileName);
    HGBase_LeaveLock(m_lockBack);
    HGBase_SetEvent(m_event);

    return HGBASE_ERR_OK;
}

HGResult HGImgThumb::refreshItem(const QString &fileName)
{
    if (fileName.isEmpty())
    {
        return HGBASE_ERR_INVALIDARG;
    }

    QString stdFileName = getStdFileName(fileName);
    int index = findIndex(fileName);
    return refreshItem(index);
}

HGResult HGImgThumb::refreshAllItems()
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return HGBASE_ERR_FAIL;
    }

    HGBase_EnterLock(m_lockBack);
    m_backList.clear();
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        m_backList.push_back(m_frontItems[i]->fileName);
    }
    HGBase_LeaveLock(m_lockBack);
    HGBase_SetEvent(m_event);

    return HGBASE_ERR_OK;
}

void HGImgThumb::notify_mouse_leave(void)
{
    leaveEvent(nullptr);
}

void HGImgThumb::mousePressEvent(QMouseEvent *e)
{
    m_mouseOn = true;

    MouseStatus mouseStatus = MouseStatus_Null;
    int index = getItemIndex(e->pos(), mouseStatus);

    if (-1 == index && MouseStatus_Null != mouseStatus)
    {
        // 右键不处理滚动条区域
        if (e->button() == Qt::LeftButton)
        {
            m_mousePressStatus = mouseStatus;
            m_mousePressBeginX = e->pos().x();
            m_mousePressBeginY = e->pos().y();
            Show();
        }

        return;
    }

    m_hitMouseButtons = e->button();
    m_hitKeyboardModifiers = QGuiApplication::keyboardModifiers();
    m_hitItemIndex = index;

    bool emitCurItemChange = false;
    bool emitItemSelectingChange = false;

    if (e->button() == Qt::RightButton) // 右键按下
    {
        if (-1 != index)
        {
            if (Qt::ControlModifier != m_hitKeyboardModifiers)
            {
                if (!m_frontItems[index]->selected)
                {
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        m_frontItems[i]->selected = (i == index) ? true : false;
                    }

                    emitItemSelectingChange = true;
                }

                if (index != m_curItemIndex)
                {
                    m_curItemIndex = index;
                    emitCurItemChange = true;
                }

                m_pushItemIndex = index;
                m_signItemIndex = index;
            }
        }
    }
    else // 左键按下
    {
        if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
        {
            if (-1 != index)
            {
                if (index != m_curItemIndex)
                {
                    m_curItemIndex = index;
                    emitCurItemChange = true;
                }

                m_pushItemIndex = index;
                m_signItemIndex = index;
            }
        }
        else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
        {
            if (-1 != index)
            {
                if (-1 == m_signItemIndex)
                {
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i == index)
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
                else
                {
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i >= HGMIN(index, m_signItemIndex) && i <= HGMAX(index, m_signItemIndex))
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }

                if (index != m_curItemIndex)
                {
                    m_curItemIndex = index;
                    emitCurItemChange = true;
                }

                m_pushItemIndex = index;
            }
        }
        else
        {
            if (-1 != index)
            {
                if (!m_frontItems[index]->selected)
                {
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        m_frontItems[i]->selected = (i == index) ? true : false;
                    }

                    emitItemSelectingChange = true;
                }

                if (index != m_curItemIndex)
                {
                    m_curItemIndex = index;
                    emitCurItemChange = true;
                }

                m_pushItemIndex = index;
                m_signItemIndex = index;
            }
        }
    }

    if (-1 != index)
    {
        if (e->button() == Qt::LeftButton && index == m_curItemIndex)
        {
            // 准备拖动
            m_operate = 1;
            m_operateStartX = e->pos().x();
            m_operateStartY = e->pos().y();
        }

        locateItem(index);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    }
    else
    {
        if (e->button() == Qt::LeftButton && 0 != (int)m_frontItems.size())
        {
            assert(m_showThumb);
            // 准备框选
            m_operate = 2;
            m_operateStartX = e->pos().x();
            m_operateStartY = e->pos().y();
        }
    }

    Show();
    if (emitCurItemChange)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChange)
        emit itemSelectingChanged();
}

void HGImgThumb::mouseMoveEvent(QMouseEvent* e)
{
    bool emitCurItemChange = false;
    bool emitItemSelectingChange = false;

    // 处理拖动
    if (m_frameSelection)
    {
        m_frameSelectionRect.left = HGMIN(m_frameSelectionStartX, e->pos().x() - round(m_thumbRect.left));
        m_frameSelectionRect.top = HGMIN(m_frameSelectionStartY, e->pos().y() - round(m_thumbRect.top));
        m_frameSelectionRect.right = HGMAX(m_frameSelectionStartX, e->pos().x() - round(m_thumbRect.left));
        m_frameSelectionRect.bottom = HGMAX(m_frameSelectionStartY, e->pos().y() - round(m_thumbRect.top));
        m_frameSelectionRectValid = true;

        QRect rect1(m_frameSelectionRect.left, m_frameSelectionRect.top,
                    m_frameSelectionRect.right - m_frameSelectionRect.left, m_frameSelectionRect.bottom - m_frameSelectionRect.top);
        for (int i = 0; i < (int)m_frontItems.size(); ++i)
        {
            QPoint pt = getItemPos(i);
            QRect rect2(pt.x(), pt.y(), m_itemSize, m_itemSize + m_itemTextHeight);
            if (rect1.intersects(rect2))
            {
                if (!m_frontItems[i]->selected)
                    emitItemSelectingChange = true;
                m_frontItems[i]->selected = true;
            }
            else
            {
                if (m_frontItems[i]->selected)
                    emitItemSelectingChange = true;
                m_frontItems[i]->selected = false;
            }
        }

        if (e->pos().x() < 0)
        {
            m_thumbRect.left += -e->pos().x();
            m_thumbRect.right += -e->pos().x();
            recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        }
        else if (e->pos().x() > this->width())
        {
            m_thumbRect.left -= (e->pos().x() - this->width());
            m_thumbRect.right -= (e->pos().x() - this->width());
            recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        }

        if (e->pos().y() < 0)
        {
            m_thumbRect.top += -e->pos().y();
            m_thumbRect.bottom += -e->pos().y();
            recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        }
        else if (e->pos().y() > this->height())
        {
            m_thumbRect.top -= (e->pos().y() - this->height());
            m_thumbRect.bottom -= (e->pos().y() - this->height());
            recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        }
    }

    // 处理滚动条
    if (MouseStatus_HScrollSlider == m_mousePressStatus)
    {
        int lXAmount = e->pos().x() - m_mousePressBeginX;
        double offset;
        if (!m_vScroll)
        {
            int rollTotalLen = this->width() - 2 * m_scrollSize;
            int rollLeft = round((double)rollTotalLen * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left));
            int rollRight = round((double)rollTotalLen * (-m_thumbRect.left + this->width()) / (double)(m_thumbRect.right - m_thumbRect.left));
            int rollLen = rollRight - rollLeft;
            if (rollLen >= m_minScrollSliderSize)
                offset = lXAmount * (m_thumbRect.right - m_thumbRect.left) / rollTotalLen;
            else
                offset = lXAmount * (m_thumbRect.right - m_thumbRect.left - this->width()) / (rollTotalLen - m_minScrollSliderSize);
        }
        else
        {
            int rollTotalLen = this->width() - 3 * m_scrollSize;
            int rollLeft = round((double)rollTotalLen * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left));
            int rollRight = round((double)rollTotalLen * (-m_thumbRect.left + this->width() - m_scrollSize) / (double)(m_thumbRect.right - m_thumbRect.left));
            int rollLen = rollRight - rollLeft;
            if (rollLen >= m_minScrollSliderSize)
                offset = lXAmount * (m_thumbRect.right - m_thumbRect.left) / rollTotalLen;
            else
                offset = lXAmount * (m_thumbRect.right - m_thumbRect.left - this->width() + m_scrollSize) / (rollTotalLen - m_minScrollSliderSize);
        }
        m_thumbRect.left -= offset;
        m_thumbRect.right -= offset;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

        m_mousePressBeginX = e->pos().x();
        m_mousePressBeginY = e->pos().y();
    }
    else if (MouseStatus_VScrollSlider == m_mousePressStatus)
    {
        int lYAmount = e->pos().y() - m_mousePressBeginY;
        double offset;
        if (!m_hScroll)
        {
            int rollTotalLen = this->height() - 2 * m_scrollSize;
            int rollTop = round((double)rollTotalLen * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top));
            int rollBottom = round((double)rollTotalLen * (-m_thumbRect.top + this->height()) / (double)(m_thumbRect.bottom - m_thumbRect.top));
            int rollLen = rollBottom - rollTop;
            if (rollLen >= m_minScrollSliderSize)
                offset = lYAmount * (m_thumbRect.bottom - m_thumbRect.top) / rollTotalLen;
            else
                offset = lYAmount * (m_thumbRect.bottom - m_thumbRect.top - this->height()) / (rollTotalLen - m_minScrollSliderSize);
        }
        else
        {
            int rollTotalLen = this->height() - 3 * m_scrollSize;
            int rollTop = round((double)rollTotalLen * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top));
            int rollBottom = round((double)rollTotalLen * (-m_thumbRect.top + this->height() - m_scrollSize) / (double)(m_thumbRect.bottom - m_thumbRect.top));
            int rollLen = rollBottom - rollTop;
            if (rollLen >= m_minScrollSliderSize)
                offset = lYAmount * (m_thumbRect.bottom - m_thumbRect.top) / rollTotalLen;
            else
                offset = lYAmount * (m_thumbRect.bottom - m_thumbRect.top - this->height() + m_scrollSize) / (rollTotalLen - m_minScrollSliderSize);
        }
        m_thumbRect.top -= offset;
        m_thumbRect.bottom -= offset;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

        m_mousePressBeginX = e->pos().x();
        m_mousePressBeginY = e->pos().y();
    }

    if (0 == m_operate)
    {
        m_hotItemIndex = getItemIndex(e->pos(), m_mouseMoveStatus);
    }
    else if (1 == m_operate)
    {
        if ((e->buttons() & Qt::LeftButton)
                && (e->pos() - QPoint(m_operateStartX, m_operateStartY)).manhattanLength() >= QApplication::startDragDistance()
                && -1 != m_curItemIndex && m_frontItems[m_curItemIndex]->selected)
        {
            QList<QUrl> urls;
            for (int i = 0; i < (int)m_frontItems.size(); ++i)
            {
                if (m_frontItems[i]->selected)
                    urls.append(QUrl::fromLocalFile(m_frontItems[i]->fileName));
            }

            QDrag *drag = new QDrag(this);
            QMimeData *mimeData = new QMimeData;
            mimeData->setUrls(urls);
            drag->setMimeData(mimeData);

            QPixmap pixmap;
            HGBase_EnterLock(m_lockFront);
            QImage *img = m_frontItems[m_curItemIndex]->image;
            if (nullptr == img)
                img = m_itemImage;
            if (nullptr != img)
                pixmap = QPixmap::fromImage(*img);
            HGBase_LeaveLock(m_lockFront);

            if (!pixmap.isNull())
            {
                QPainter painter(&pixmap);
                QRect textRect(0, 0, pixmap.width(), pixmap.height());
                char chCount[12];
                sprintf(chCount, "%d", urls.count());
                QFont countFont("微软雅黑", pixmap.width() / 4);
                painter.setFont(countFont);
                QPen countPen(QColor(0, 0, 0, 200));
                painter.setPen(countPen);
                painter.drawText(textRect, Qt::AlignHCenter | Qt::AlignVCenter, chCount);

                drag->setPixmap(pixmap);
                drag->setHotSpot(QPoint(pixmap.width() / 2, 4 * pixmap.height() / 5));
            }

            m_pushItemIndex = -1;

            m_operate = 0;
            m_operateStartX = -1;
            m_operateStartY = -1;

            m_hitMouseButtons = Qt::NoButton;
            m_hitKeyboardModifiers = Qt::NoModifier;
            m_hitItemIndex = -1;

            // 开始拖动
            drag->exec(Qt::CopyAction);
        }
    }
    else if (2 == m_operate)
    {
        if ((e->buttons() & Qt::LeftButton)
                && (e->pos() - QPoint(m_operateStartX, m_operateStartY)).manhattanLength() >= QApplication::startDragDistance())
        {
            m_frameSelectionStartX = m_operateStartX - round(m_thumbRect.left);
            m_frameSelectionStartY = m_operateStartY - round(m_thumbRect.top);

            m_pushItemIndex = -1;

            m_operate = 0;
            m_operateStartX = -1;
            m_operateStartY = -1;

            m_hitMouseButtons = Qt::NoButton;
            m_hitKeyboardModifiers = Qt::NoModifier;
            m_hitItemIndex = -1;

            for (int i = 0; i < (int)m_frontItems.size(); ++i)
            {
                if (m_frontItems[i]->selected)
                    emitItemSelectingChange = true;
                m_frontItems[i]->selected = false;
            }

            // 开始框选
            m_frameSelection = true;
            m_frameSelectionRect.left = HGMIN(m_frameSelectionStartX, e->pos().x() - round(m_thumbRect.left));
            m_frameSelectionRect.top = HGMIN(m_frameSelectionStartY, e->pos().y() - round(m_thumbRect.top));
            m_frameSelectionRect.right = HGMAX(m_frameSelectionStartX, e->pos().x() - round(m_thumbRect.left));
            m_frameSelectionRect.bottom = HGMAX(m_frameSelectionStartY, e->pos().y() - round(m_thumbRect.top));
            m_frameSelectionRectValid = true;
        }
    }

    Show();
    if (emitCurItemChange)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChange)
        emit itemSelectingChanged();
}

void HGImgThumb::mouseReleaseEvent(QMouseEvent *e)
{
    Q_UNUSED(e);

    m_frameSelectionRectValid = false;
    m_frameSelection = false;

    m_curInsertPos = -1;
    m_insertPtValid = false;
    m_draging = false;

    m_pushItemIndex = -1;

    m_operateStartX = -1;
    m_operateStartY = -1;
    m_operate = 0;

    Qt::MouseButtons oldHitMouseButtons = m_hitMouseButtons;
    Qt::KeyboardModifiers oldHitKeyboardModifiers = m_hitKeyboardModifiers;
    int oldHitItemIndex = m_hitItemIndex;
    m_hitMouseButtons = Qt::NoButton;
    m_hitKeyboardModifiers = Qt::NoModifier;
    m_hitItemIndex = -1;

    MouseStatus oldMousePressStatus = m_mousePressStatus;
    m_mousePressStatus = MouseStatus_Null;
    m_mousePressBeginX = -1;
    m_mousePressBeginY = -1;

    bool emitItemSelectingChanged = false;
    bool emitCurrItemChanged = false;

    // 处理拖动

    // 处理按item区域
    if (oldHitMouseButtons == Qt::RightButton)
    {
        if (-1 == oldHitItemIndex)
        {
            if (oldHitKeyboardModifiers == Qt::NoModifier)
            {
                for (int i = 0; i < (int)m_frontItems.size(); ++i)
                {
                    if (m_frontItems[i]->selected)
                        emitItemSelectingChanged = true;
                    m_frontItems[i]->selected = false;
                }
            }
        }
    }
    else if (oldHitMouseButtons == Qt::LeftButton)
    {
        if (oldHitKeyboardModifiers == Qt::ControlModifier)
        {
            if (-1 != oldHitItemIndex)
            {
                if (m_frontItems[oldHitItemIndex]->selected)
                {
                    m_frontItems[oldHitItemIndex]->selected = false;
                }
                else
                {
                    m_frontItems[oldHitItemIndex]->selected = true;
                }

                emitItemSelectingChanged = true;
            }
        }
        else if (oldHitKeyboardModifiers == Qt::ShiftModifier)
        {
            // 什么也不做
        }
        else
        {
            if (-1 == oldHitItemIndex)
            {
                for (int i = 0; i < (int)m_frontItems.size(); ++i)
                {
                    if (m_frontItems[i]->selected)
                        emitItemSelectingChanged = true;
                    m_frontItems[i]->selected = false;
                }
            }
            else
            {
                for (int i = 0; i < (int)m_frontItems.size(); ++i)
                {
                    if (i != oldHitItemIndex)
                    {
                        if (m_frontItems[i]->selected)
                            emitItemSelectingChanged = true;
                        m_frontItems[i]->selected = false;
                    }
                }
            }
        }
    }

    // 处理按滚动条区域
    MouseStatus mouseMoveStatus = MouseStatus_Null;
    getItemIndex(e->pos(), mouseMoveStatus);
    if (MouseStatus_HScrollLeft == oldMousePressStatus && MouseStatus_HScrollLeft == mouseMoveStatus)
    {
        m_thumbRect.left += (double)m_itemSize / 2.0;
        m_thumbRect.right += (double)m_itemSize / 2.0;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }
    else if (MouseStatus_HScrollRight == oldMousePressStatus && MouseStatus_HScrollRight == mouseMoveStatus)
    {
        m_thumbRect.left -= (double)m_itemSize / 2.0;
        m_thumbRect.right -= (double)m_itemSize / 2.0;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }
    else if (MouseStatus_VScrollTop == oldMousePressStatus && MouseStatus_VScrollTop == mouseMoveStatus)
    {
        m_thumbRect.top += (double)m_itemSize / 2.0;
        m_thumbRect.bottom += (double)m_itemSize / 2.0;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }
    else if (MouseStatus_VScrollBottom == oldMousePressStatus && MouseStatus_VScrollBottom == mouseMoveStatus)
    {
        m_thumbRect.top -= (double)m_itemSize / 2.0;
        m_thumbRect.bottom -= (double)m_itemSize / 2.0;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
    if (emitCurrItemChanged)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChanged)
        emit itemSelectingChanged();
}

void HGImgThumb::enterEvent(QEvent *e)
{
    Q_UNUSED(e);
    m_mouseOn = true;
}

void HGImgThumb::leaveEvent(QEvent *e)
{
    Q_UNUSED(e);

    m_frameSelectionRectValid = false;
    m_frameSelection = false;

    // 拖动状态不能重置
    //m_curInsertPos = -1;
    //m_insertPtValid = false;
    //m_draging = false;

    m_pushItemIndex = -1;

    m_operateStartX = -1;
    m_operateStartY = -1;
    m_operate = 0;

    m_hitMouseButtons = Qt::NoButton;
    m_hitKeyboardModifiers = Qt::NoModifier;
    m_hitItemIndex = -1;

    m_mousePressStatus = MouseStatus_Null;
    m_mousePressBeginX = -1;
    m_mousePressBeginY = -1;

    m_mouseOn = false;
    m_hotItemIndex = -1;
    m_mouseMoveStatus = MouseStatus_Null;
    Show();
}

static void GetShowImageRect(const HGRect *pWnd, int nImgWidth, int nImgHeight, HGRect &rcShowImage)
{
    int nWndWidth = pWnd->right - pWnd->left;
    int nWndHeight = pWnd->bottom - pWnd->top;

    int left, top, right, bottom;
    if (nImgWidth > nWndWidth || nImgHeight > nWndHeight)
    {
        if (nImgWidth * nWndHeight < nImgHeight * nWndWidth)
        {
            int width = nWndHeight * nImgWidth / nImgHeight;
            left = (pWnd->left + pWnd->right - width) / 2;
            right = (pWnd->left + pWnd->right + width) / 2;
            top = pWnd->top;
            bottom = pWnd->bottom;
        }
        else
        {
            int height = nWndWidth * nImgHeight / nImgWidth;
            left = pWnd->left;
            right = pWnd->right;
            top = (pWnd->top + pWnd->bottom - height) / 2;
            bottom = (pWnd->top + pWnd->bottom + height) / 2;
        }
    }
    else
    {
        left = (pWnd->left + pWnd->right - nImgWidth) / 2;
        right = (pWnd->left + pWnd->right + nImgWidth) / 2;
        top = (pWnd->top + pWnd->bottom - nImgHeight) / 2;
        bottom = (pWnd->top + pWnd->bottom + nImgHeight) / 2;
    }

    rcShowImage.left = left;
    rcShowImage.top = top;
    rcShowImage.right = right;
    rcShowImage.bottom = bottom;
}

void HGImgThumb::paintEvent(QPaintEvent* e)
{
    Q_UNUSED(e);

    QPainter painter(this);
    QRect rcWnd(0, 0, this->width(), this->height());
    painter.fillRect(rcWnd, qRgb(250, 250, 250));

    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        QPoint pt(getItemPos(i).x() + round(m_thumbRect.left),
                  getItemPos(i).y() + round(m_thumbRect.top));

        QRect rcItem(pt.x(), pt.y(), m_itemSize, m_itemSize + m_itemTextHeight);
        if (!rcItem.intersects(rcWnd))
        {
            continue;
        }

        // 绘制图像
        HGBase_EnterLock(m_lockFront);
        int imgOriginWidth = m_frontItems[i]->width;
        int imgOriginHeight = m_frontItems[i]->height;
        QImage *img = m_frontItems[i]->image;
        if (nullptr == img && nullptr != m_itemImage)
        {
            assert(nullptr != m_defItemImage);
            imgOriginWidth = m_defItemImage->width();
            imgOriginHeight = m_defItemImage->height();
            img = m_itemImage;
        }
        if (nullptr != img)
        {
            HGRect rcShow;
            HGRect rcItemShow = {pt.x(), pt.y(), pt.x() + m_itemSize, pt.y() + m_itemSize};
            GetShowImageRect(&rcItemShow, imgOriginWidth, imgOriginHeight, rcShow);
            QRect destRect(rcShow.left, rcShow.top, rcShow.right - rcShow.left, rcShow.bottom - rcShow.top);
            painter.drawImage(destRect, *img);
        }
        HGBase_LeaveLock(m_lockFront);

        // 绘制itemIndex
        HGChar itemIndex[10] = {0};
        sprintf(itemIndex, "%d", i + 1);
        QRect itemIndexRect(pt.x(), pt.y(), m_itemSize, m_itemSize);
        QFont itemIndexFont("微软雅黑", m_itemSize / 4);
        painter.setFont(itemIndexFont);
        QPen itemIndexPen(QColor(0, 0, 0, 100));
        painter.setPen(itemIndexPen);
        painter.drawText(itemIndexRect, Qt::AlignHCenter | Qt::AlignVCenter, itemIndex);

        // 绘制文件名
        HGChar fileName[256] = {0};
        HGBase_GetFileName(m_frontItems[i]->fileName.toStdString().c_str(), fileName, 256);
        QRect fileNameRect(pt.x(), pt.y() + m_itemSize, m_itemSize, m_itemTextHeight);
        QFont fileNameFont("微软雅黑", 8);
        painter.setFont(fileNameFont);
        QPen fileNamePen(QColor(0, 0, 0, 255));
        painter.setPen(fileNamePen);
        painter.drawText(fileNameRect, Qt::AlignHCenter | Qt::AlignVCenter, fileName);

        if (m_frontItems[i]->selected)
        {
            painter.fillRect(pt.x(), pt.y(), m_itemSize, m_itemSize + m_itemTextHeight, QColor(0, 0, 0, 128));
        }
    }

    if (-1 != m_hotItemIndex && !m_frontItems[m_hotItemIndex]->selected)
    {
        QPoint pt(getItemPos(m_hotItemIndex).x() + round(m_thumbRect.left),
                  getItemPos(m_hotItemIndex).y() + round(m_thumbRect.top));
        painter.fillRect(pt.x(), pt.y(), m_itemSize, m_itemSize + m_itemTextHeight, QColor(0, 0, 0, 64));
    }

    if (-1 != m_pushItemIndex && !m_frontItems[m_pushItemIndex]->selected)
    {
        QPoint pt(getItemPos(m_pushItemIndex).x() + round(m_thumbRect.left),
                  getItemPos(m_pushItemIndex).y() + round(m_thumbRect.top));
        painter.fillRect(pt.x(), pt.y(), m_itemSize, m_itemSize + m_itemTextHeight, QColor(0, 0, 0, 96));
    }

    if (-1 != m_curItemIndex)
    {
        QPoint pt(getItemPos(m_curItemIndex).x() + round(m_thumbRect.left),
                  getItemPos(m_curItemIndex).y() + round(m_thumbRect.top));

        QPen pen(QColor(0, 0, 0, 128));
        painter.setPen(pen);
        painter.drawRect(pt.x(), pt.y(), m_itemSize - 1, m_itemSize + m_itemTextHeight - 1);
    }

    if (m_insertPtValid)
    {
        QPen pen(QColor(0, 0, 0, 128), 3);
        painter.setPen(pen);
        QPoint pt1(m_insertPt1.x() + round(m_thumbRect.left), m_insertPt1.y() + round(m_thumbRect.top));
        QPoint pt2(m_insertPt2.x() + round(m_thumbRect.left), m_insertPt2.y() + round(m_thumbRect.top));
        painter.drawLine(pt1, pt2);
    }

    if (m_frameSelectionRectValid)
    {
        QRect rect(m_frameSelectionRect.left + round(m_thumbRect.left), m_frameSelectionRect.top + round(m_thumbRect.top),
                   m_frameSelectionRect.right - m_frameSelectionRect.left,
                   m_frameSelectionRect.bottom - m_frameSelectionRect.top);
        painter.fillRect(rect, QColor(0, 0, 0, 128));
    }

    DrawScroll(painter);
}

void HGImgThumb::wheelEvent(QWheelEvent* e)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return;
    }

    if (!m_showThumb)
    {
        return;
    }

    if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
    {
        if (e->delta() > 0)
            zoomIn();
        else
            zoomOut();
        return;
    }

    if (e->delta() > 0)
    {
        if (ThumbType_Hori == m_type)
        {
            m_thumbRect.left += (double)m_itemSize / 2.0;
            m_thumbRect.right += (double)m_itemSize / 2.0;
        }
        else
        {
            m_thumbRect.top += (double)m_itemSize / 2.0;
            m_thumbRect.bottom += (double)m_itemSize / 2.0;
        }
    }
    else
    {
        if (ThumbType_Hori == m_type)
        {
            m_thumbRect.left -= (double)m_itemSize / 2.0;
            m_thumbRect.right -= (double)m_itemSize / 2.0;
        }
        else
        {
            m_thumbRect.top -= (double)m_itemSize / 2.0;
            m_thumbRect.bottom -= (double)m_itemSize / 2.0;
        }
    }

    recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();
}

void HGImgThumb::resizeEvent(QResizeEvent* e)
{
    Q_UNUSED(e);

    reset();

    if (m_showThumb)
    {
        int showWidth = 0, showHeight = 0;
        calcShowSize(this->width(), this->height(), m_gapSize, m_scrollSize, m_itemSize, m_itemTextHeight, m_type, (int)m_frontItems.size(),
            showWidth, showHeight, m_hScroll, m_vScroll);
        m_thumbRect.right = m_thumbRect.left + (double)showWidth;
        m_thumbRect.bottom = m_thumbRect.top + (double)showHeight;
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);

        m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    }

    Show();
}

void HGImgThumb::keyPressEvent(QKeyEvent *e)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return;
    }

    if (m_frontItems.empty())
    {
        return;
    }

    if (e->key() != Qt::Key_Left && e->key() != Qt::Key_Right
        && e->key() != Qt::Key_Up && e->key() != Qt::Key_Down
        && e->key() != Qt::Key_Home && e->key() != Qt::Key_End
        && e->key() != Qt::Key_A)
    {
        return;
    }

    bool emitCurItemChange = false;
    bool emitItemSelectingChange = false;

    if (e->key() == Qt::Key_Left)
    {
        if (ThumbType_Vert != m_type)
        {
            if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
            {
                // 按住Ctrl什么也不干
            }
            else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
            {
                if (-1 != m_signItemIndex)
                {
                    if (-1 == m_curItemIndex)
                    {
                        m_curItemIndex = m_signItemIndex;
                        emitCurItemChange = true;
                    }

                    if (m_curItemIndex > 0)
                    {
                        --m_curItemIndex;
                        emitCurItemChange = true;
                    }

                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
            else
            {
                if (m_curItemIndex > 0)
                {
                    --m_curItemIndex;
                    emitCurItemChange = true;
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i == m_curItemIndex)
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
        }
    }
    else if (e->key() == Qt::Key_Right)
    {
        if (ThumbType_Vert != m_type)
        {
            if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
            {
                // 按住Ctrl什么也不干
            }
            else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
            {
                if (-1 != m_signItemIndex)
                {
                    if (-1 == m_curItemIndex)
                    {
                        m_curItemIndex = m_signItemIndex;
                        emitCurItemChange = true;
                    }

                    if (m_curItemIndex < (int)m_frontItems.size() - 1)
                    {
                        ++m_curItemIndex;
                        emitCurItemChange = true;
                    }

                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
            else
            {
                if (m_curItemIndex != -1 && m_curItemIndex < (int)m_frontItems.size() - 1)
                {
                    ++m_curItemIndex;
                    emitCurItemChange = true;
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i == m_curItemIndex)
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
        }
    }
    else if (e->key() == Qt::Key_Up)
    {
        if (ThumbType_Hori != m_type)
        {
            if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
            {
                // 按住Ctrl什么也不干
            }
            else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
            {
                if (-1 != m_signItemIndex)
                {
                    if (-1 == m_curItemIndex)
                    {
                        m_curItemIndex = m_signItemIndex;
                        emitCurItemChange = true;
                    }

                    if (getItemRow(m_curItemIndex) > 0)
                    {
                        m_curItemIndex -= getTotalCols();
                        emitCurItemChange = true;
                    }

                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
            else
            {
                if (m_curItemIndex != -1 && getItemRow(m_curItemIndex) > 0)
                {
                    m_curItemIndex -= getTotalCols();
                    emitCurItemChange = true;
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i == m_curItemIndex)
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
        }
    }
    else if (e->key() == Qt::Key_Down)
    {
        if (ThumbType_Hori != m_type)
        {
            if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
            {
                // 按住Ctrl什么也不干
            }
            else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
            {
                if (-1 != m_signItemIndex)
                {
                    if (-1 == m_curItemIndex)
                    {
                        m_curItemIndex = m_signItemIndex;
                        emitCurItemChange = true;
                    }

                    if (getItemRow(m_curItemIndex) < getTotalRows() - 1)
                    {
                        m_curItemIndex = HGMIN(m_curItemIndex + getTotalCols(), (int)m_frontItems.size() - 1);
                        emitCurItemChange = true;
                    }

                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
            else
            {
                if (m_curItemIndex != -1 && getItemRow(m_curItemIndex) < getTotalRows() - 1)
                {
                    m_curItemIndex = HGMIN(m_curItemIndex + getTotalCols(), (int)m_frontItems.size() - 1);
                    emitCurItemChange = true;
                    for (int i = 0; i < (int)m_frontItems.size(); ++i)
                    {
                        if (i == m_curItemIndex)
                        {
                            if (!m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = true;
                        }
                        else
                        {
                            if (m_frontItems[i]->selected)
                                emitItemSelectingChange = true;
                            m_frontItems[i]->selected = false;
                        }
                    }
                }
            }
        }
    }
    else if (e->key() == Qt::Key_Home)
    {
        if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
        {
            // 按住Ctrl什么也不干
        }
        else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
        {
            if (-1 != m_signItemIndex)
            {
                if (0 != m_curItemIndex)
                {
                    m_curItemIndex = 0;
                    emitCurItemChange = true;
                }

                for (int i = 0; i < (int)m_frontItems.size(); ++i)
                {
                    if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                    {
                        if (!m_frontItems[i]->selected)
                            emitItemSelectingChange = true;
                        m_frontItems[i]->selected = true;
                    }
                    else
                    {
                        if (m_frontItems[i]->selected)
                            emitItemSelectingChange = true;
                        m_frontItems[i]->selected = false;
                    }
                }
            }
        }
        else
        {
            if (0 != m_curItemIndex)
            {
                m_curItemIndex = 0;
                emitCurItemChange = true;
            }

            for (int i = 0; i < (int)m_frontItems.size(); ++i)
            {
                if (i == m_curItemIndex)
                {
                    if (!m_frontItems[i]->selected)
                        emitItemSelectingChange = true;
                    m_frontItems[i]->selected = true;
                }
                else
                {
                    if (m_frontItems[i]->selected)
                        emitItemSelectingChange = true;
                    m_frontItems[i]->selected = false;
                }
            }
        }
    }
    else if (e->key() == Qt::Key_End)
    {
        if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
        {
            // 按住Ctrl什么也不干
        }
        else if (QGuiApplication::keyboardModifiers() == Qt::ShiftModifier)
        {
            if (-1 != m_signItemIndex)
            {
                if ((int)m_frontItems.size() - 1 != m_curItemIndex)
                {
                    m_curItemIndex = (int)m_frontItems.size() - 1;
                    emitCurItemChange = true;
                }

                for (int i = 0; i < (int)m_frontItems.size(); ++i)
                {
                    if (i >= HGMIN(m_curItemIndex, m_signItemIndex) && i <= HGMAX(m_curItemIndex, m_signItemIndex))
                    {
                        if (!m_frontItems[i]->selected)
                            emitItemSelectingChange = true;
                        m_frontItems[i]->selected = true;
                    }
                    else
                    {
                        if (m_frontItems[i]->selected)
                            emitItemSelectingChange = true;
                        m_frontItems[i]->selected = false;
                    }
                }
            }
        }
        else
        {
            if ((int)m_frontItems.size() - 1 != m_curItemIndex)
            {
                m_curItemIndex = (int)m_frontItems.size() - 1;
                emitCurItemChange = true;
            }

            for (int i = 0; i < (int)m_frontItems.size(); ++i)
            {
                if (i == m_curItemIndex)
                {
                    if (!m_frontItems[i]->selected)
                        emitItemSelectingChange = true;
                    m_frontItems[i]->selected = true;
                }
                else
                {
                    if (m_frontItems[i]->selected)
                        emitItemSelectingChange = true;
                    m_frontItems[i]->selected = false;
                }
            }
        }
    }
    else if (e->key() == Qt::Key_A)
    {
        if (QGuiApplication::keyboardModifiers() == Qt::ControlModifier)
        {
            for (int i = 0; i < (int)m_frontItems.size(); ++i)
            {
                if (!m_frontItems[i]->selected)
                    emitItemSelectingChange = true;
                m_frontItems[i]->selected = true;
            }
        }
    }

    if (-1 != m_curItemIndex)
    {
        locateItem(m_curItemIndex);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
        m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    }

    Show();
    if (emitCurItemChange)
        emit currItemChanged(m_curItemIndex);
    if (emitItemSelectingChange)
        emit itemSelectingChanged();
}

void HGImgThumb::keyReleaseEvent(QKeyEvent *e)
{
    Q_UNUSED(e);
}

void HGImgThumb::focusInEvent(QFocusEvent *e)
{
    Q_UNUSED(e);
}

void HGImgThumb::focusOutEvent(QFocusEvent *e)
{
    Q_UNUSED(e);
}

void HGImgThumb::contextMenuEvent(QContextMenuEvent* e)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return;
    }

    m_pushItemIndex = -1;

    MouseStatus mouseMoveStatus = MouseStatus_Null;
    int index = getItemIndex(e->pos(), mouseMoveStatus);
    if (MouseStatus_Null == mouseMoveStatus)
        emit contextMenuEvent(index);
}

void HGImgThumb::dragEnterEvent(QDragEnterEvent *e)
{
    qDebug("dragEnterEvent");

    if (e->mimeData()->hasUrls())
    {
        m_draging = true;
        e->accept();
    }
}

void HGImgThumb::dragMoveEvent(QDragMoveEvent *e)
{
    //qDebug("dragMoveEvent");

    int insertPos = getInsertPos(e->pos(), m_insertPtValid, m_insertPt1, m_insertPt2);
    if (m_insertPtValid && m_curInsertPos != insertPos)
    {
        locateInsert(m_insertPt1, m_insertPt2);
        recalcShowRect(this->width(), this->height(), m_scrollSize, m_type, m_hScroll, m_vScroll, m_showThumb, m_thumbRect);
    }

    if (m_curInsertPos != insertPos)
        qDebug("current insert pos=%d", insertPos);
    m_curInsertPos = insertPos;
    Show();
}

void HGImgThumb::dragLeaveEvent(QDragLeaveEvent *e)
{
    qDebug("dragLeaveEvent");
    Q_UNUSED(e);

    m_curInsertPos = -1;
    m_insertPtValid = false;
    m_draging = false;
    Show();
}

void HGImgThumb::dropEvent(QDropEvent *e)
{
    QStringList fileNames;
    QList<QUrl> urls = e->mimeData()->urls();
    for (QUrl url : urls)
    {
        fileNames.append(url.toLocalFile());
    }

    int pos = m_curInsertPos;

    m_curInsertPos = -1;
    m_insertPtValid = false;
    m_draging = false;

    m_hotItemIndex = getItemIndex(mapFromGlobal(QCursor::pos()), m_mouseMoveStatus);
    Show();

    emit drop(e->source(), fileNames, pos);
}

void HGImgThumb::mouseDoubleClickEvent(QMouseEvent *e)
{
    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return;
    }

    MouseStatus mouseMoveStatus = MouseStatus_Null;
    int index = getItemIndex(e->pos(), mouseMoveStatus);
    if (MouseStatus_Null == mouseMoveStatus && -1 != index)
    {
        if (m_curItemIndex == index && m_frontItems[index]->selected)
            emit itemDoubleClicked(index);
    }
    else
    {
        QWidget::mouseDoubleClickEvent(e);
    }
}

void HGImgThumb::on_updateItem()
{
    Show();
}

QImage* HGImgThumb::createItemImage(const QImage *srcImage, int itemSize)
{
    assert(nullptr != srcImage);

    QImage *img = nullptr;
    if (srcImage->width() > itemSize || srcImage->height() > itemSize)
    {
        int width, height;
        if (srcImage->width() < srcImage->height())
        {
            height = itemSize;
            width = height * srcImage->width() / srcImage->height();
        }
        else
        {
            width = itemSize;
            height = width * srcImage->height() / srcImage->width();
        }

        assert(width != srcImage->width() || height != srcImage->height());
        img = new QImage(srcImage->scaled(width, height, Qt::IgnoreAspectRatio, Qt::SmoothTransformation));
    }
    else
    {
        img = new QImage(srcImage->copy(0, 0, srcImage->width(), srcImage->height()));
    }

    if (img->isNull())
    {
        delete img;
        return nullptr;
    }

    return img;
}

QImage* HGImgThumb::createItemImage(HGImage srcImage, int itemSize)
{
    assert(nullptr != srcImage);

    HGImageInfo info;
    HGBase_GetImageInfo(srcImage, &info);

    QImage::Format fmt = QImage::Format_Invalid;
    if (info.type == HGBASE_IMGTYPE_BINARY)
        fmt = QImage::Format_Mono;
    else if (info.type == HGBASE_IMGTYPE_GRAY)
        fmt = QImage::Format_Grayscale8;
    else if (info.type == HGBASE_IMGTYPE_RGB)
        fmt = QImage::Format_RGB888;
    else if (info.type == HGBASE_IMGTYPE_RGBA)
        fmt = QImage::Format_RGBA8888;
    if (QImage::Format_Invalid == fmt)
    {
        return nullptr;
    }

    HGByte *data = nullptr;
    HGBase_GetImageData(srcImage, &data);
    QImage img(data, info.width, info.height, info.widthStep, fmt);
    if (img.isNull())
    {
        return nullptr;
    }

    if (img.format() == QImage::Format_Mono)
        img = img.convertToFormat(QImage::Format_Grayscale8);

    return createItemImage(&img, itemSize);
}

void HGImgThumb::DrawImage(QPainter &painter, const QRect &destRect, const QImage *image, const QRect &stretchRect)
{
    if (destRect.width() < image->width() - stretchRect.width()
            || destRect.height() < image->height() - stretchRect.height())
    {
        painter.drawImage(destRect, *image);
        return;
    }

    for (int i = 0; i < 9; ++i)
    {
        int DestX = destRect.left(), DestY = destRect.top(), DestWidth = destRect.width(), DestHeight = destRect.height();
        int SrcX = 0, SrcY = 0, SrcWidth = image->width(), SrcHeight = image->height();

        if (0 == i % 3)
        {
            DestX = destRect.left();
            DestWidth = stretchRect.left();
            SrcX = 0;
            SrcWidth = stretchRect.left();
        }
        else if (1 == i % 3)
        {
            DestX = destRect.left() + stretchRect.left();
            DestWidth = destRect.width() + stretchRect.width() - image->width();
            SrcX = stretchRect.left();
            SrcWidth = stretchRect.width();
        }
        else if (2 == i % 3)
        {
            DestX = destRect.left() + destRect.width() + stretchRect.left() + stretchRect.width() - image->width();
            DestWidth = image->width() - (stretchRect.left() + stretchRect.width());
            SrcX = stretchRect.left() + stretchRect.width();
            SrcWidth = image->width() - (stretchRect.left() + stretchRect.width());
        }

        if (0 == i / 3)
        {
            DestY = destRect.top();
            DestHeight = stretchRect.top();
            SrcY = 0;
            SrcHeight = stretchRect.top();
        }
        else if (1 == i / 3)
        {
            DestY = destRect.top() + stretchRect.top();
            DestHeight = destRect.height() + stretchRect.height() - image->height();
            SrcY = stretchRect.top();
            SrcHeight = stretchRect.height();
        }
        else if (2 == i / 3)
        {
            DestY = destRect.top() + destRect.height() + stretchRect.top() + stretchRect.height() - image->height();
            DestHeight = image->height() - (stretchRect.top() + stretchRect.height());
            SrcY = stretchRect.top() + stretchRect.height();
            SrcHeight = image->height() - (stretchRect.top() + stretchRect.height());
        }

        QRect dest(DestX, DestY, DestWidth, DestHeight);
        QRect src(SrcX, SrcY, SrcWidth, SrcHeight);
        painter.drawImage(dest, *image, src);
    }
}

void HGImgThumb::calcShowSize(int wndWidth, int wndHeight, int gapSize, int scrollSize, int itemSize, int itemTextHeight, ThumbType type, int itemCount,
    int &showWidth, int &showHeight, bool &hScroll, bool &vScroll)
{
    showWidth = 0;
    showHeight = 0;
    hScroll = false;
    vScroll = false;

    if (itemCount <= 0)
    {
        return;
    }

    if (ThumbType_Hori == type)
    {
        showWidth = gapSize + itemCount * (itemSize + gapSize);
        showHeight = gapSize * 2 + itemSize + itemTextHeight;
        if (showHeight > wndHeight)
        {
            vScroll = true;
            if (showWidth > wndWidth - scrollSize)
                hScroll = true;
        }
        else
        {
            if (showWidth > wndWidth)
            {
                hScroll = true;
                if (showHeight > wndHeight - scrollSize)
                    vScroll = true;
            }
        }
    }
    else if (ThumbType_Vert == type)
    {
        showWidth = gapSize * 2 + itemSize;
        showHeight = gapSize + itemCount * (itemSize + itemTextHeight + gapSize);
        if (showHeight > wndHeight)
        {
            vScroll = true;
            if (showWidth > wndWidth - scrollSize)
                hScroll = true;
        }
        else
        {
            if (showWidth > wndWidth)
            {
                hScroll = true;
                if (showHeight > wndHeight - scrollSize)
                    vScroll = true;
            }
        }
    }
    else
    {
        int cols = HGMIN(itemCount, HGMAX(1, (wndWidth - gapSize) / (itemSize + gapSize)));
        showWidth = gapSize + cols * (itemSize + gapSize);
        int rows = (itemCount - 1) / cols + 1;
        showHeight = gapSize + rows * (itemSize + itemTextHeight + gapSize);
        if (showHeight > wndHeight)
        {
            cols = HGMIN(itemCount, HGMAX(1, (wndWidth - scrollSize - gapSize) / (itemSize + gapSize)));
            showWidth = gapSize + cols * (itemSize + gapSize);
            rows = (itemCount - 1) / cols + 1;
            showHeight = gapSize + rows * (itemSize + itemTextHeight + gapSize);
            assert(showHeight > wndHeight);

            vScroll = true;
            if (showWidth > wndWidth - scrollSize)
                hScroll = true;
        }
        else
        {
            if (showWidth > wndWidth)
            {
                hScroll = true;
                if (showHeight > wndHeight - scrollSize)
                    vScroll = true;
            }
        }
    }
}

void HGImgThumb::recalcShowRect(int wndWidth, int wndHeight, int scrollSize, ThumbType type, bool hScroll, bool vScroll, bool showThumb, ThumbRect &thumbRect)
{
    if (!showThumb)
        return;

    double width = thumbRect.right - thumbRect.left;
    double height = thumbRect.bottom - thumbRect.top;

    // 调整
    if (ThumbType_Hori == type)
    {
        if (!vScroll) // 没有垂直滚动条
        {
            if (hScroll) // 有水平滚动条
                thumbRect.top = (double)(wndHeight - scrollSize - height) / 2.0;
            else // 没有水平滚动条
                thumbRect.top = (double)(wndHeight - height) / 2.0;
            thumbRect.bottom = thumbRect.top + height;
        }
        else // 有垂直滚动条
        {
            int hScrollSize = hScroll ? scrollSize : 0;
            if (thumbRect.bottom < (double)(wndHeight - hScrollSize))
            {
                thumbRect.bottom = wndHeight - hScrollSize;
                thumbRect.top = thumbRect.bottom - height;
            }
            if (thumbRect.top > 0)
            {
                thumbRect.top = 0;
                thumbRect.bottom = thumbRect.top + height;
            }
        }

        int vScrollSize = vScroll ? scrollSize : 0;
        if (thumbRect.right < (double)(wndWidth - vScrollSize))
        {
            thumbRect.right = wndWidth - vScrollSize;
            thumbRect.left = thumbRect.right - width;
        }
        if (thumbRect.left > 0)
        {
            thumbRect.left = 0;
            thumbRect.right = thumbRect.left + width;
        }
    }
    else if (ThumbType_Vert == type)
    {
        if (!hScroll) // 没有水平滚动条
        {
            if (vScroll) // 有垂直滚动条
                thumbRect.left = (double)(wndWidth - scrollSize - width) / 2.0;
            else // 没有垂直滚动条
                thumbRect.left = (double)(wndWidth - width) / 2.0;
            thumbRect.right = thumbRect.left + width;
        }
        else // 有水平滚动条
        {
            int vScrollSize = vScroll ? scrollSize : 0;
            if (thumbRect.right < (double)(wndWidth - vScrollSize))
            {
                thumbRect.right = wndWidth - vScrollSize;
                thumbRect.left = thumbRect.right - width;
            }
            if (thumbRect.left > 0)
            {
                thumbRect.left = 0;
                thumbRect.right = thumbRect.left + width;
            }
        }

        int hScrollSize = hScroll ? scrollSize : 0;
        if (thumbRect.bottom < (double)(wndHeight - hScrollSize))
        {
            thumbRect.bottom = wndHeight - hScrollSize;
            thumbRect.top = thumbRect.bottom - height;
        }
        if (thumbRect.top > 0)
        {
            thumbRect.top = 0;
            thumbRect.bottom = thumbRect.top + height;
        }
    }
    else
    {
        int vScrollSize = vScroll ? scrollSize : 0;
        if (thumbRect.right < (double)(wndWidth - vScrollSize))
        {
            thumbRect.right = wndWidth - vScrollSize;
            thumbRect.left = thumbRect.right - width;
        }
        if (thumbRect.left > 0)
        {
            thumbRect.left = 0;
            thumbRect.right = thumbRect.left + width;
        }

        int hScrollSize = hScroll ? scrollSize : 0;
        if (thumbRect.bottom < (double)(wndHeight - hScrollSize))
        {
            thumbRect.bottom = wndHeight - hScrollSize;
            thumbRect.top = thumbRect.bottom - height;
        }
        if (thumbRect.top > 0)
        {
            thumbRect.top = 0;
            thumbRect.bottom = thumbRect.top + height;
        }
    }
}

void HGImgThumb::DrawScroll(QPainter &painter)
{
    // 滚动条背景
    QColor clrHScroll = qRgb(220, 220, 220);
    QImage *imgHScroll = m_hScrollImage;
    QColor clrVScroll = qRgb(220, 220, 220);
    QImage *imgVScroll = m_vScrollImage;
    QColor clrNullScroll = qRgb(255, 255, 255);
    QImage *nullScrollImage = m_nullScrollImage;

    // 水平滑块
    QColor clrHScrollSlider = qRgb(180, 180, 180);
    QImage *imgHScrollSlider = m_hScrollSliderImage[0];
    QRect hScrollSliderStretch = m_hScrollSliderImageStretch[0];
    if (MouseStatus_HScrollSlider == m_mousePressStatus)
    {
        clrHScrollSlider = qRgb(100, 100, 100);
        imgHScrollSlider = m_hScrollSliderImage[2];
        hScrollSliderStretch = m_hScrollSliderImageStretch[2];
    }
    else if (MouseStatus_HScrollLeft == m_mousePressStatus || MouseStatus_HScrollRight == m_mousePressStatus
             || MouseStatus_HScroll == m_mousePressStatus
             || MouseStatus_HScrollSlider == m_mouseMoveStatus || MouseStatus_HScroll == m_mouseMoveStatus
             || MouseStatus_HScrollLeft == m_mouseMoveStatus || MouseStatus_HScrollRight == m_mouseMoveStatus)
    {
        clrHScrollSlider = qRgb(140, 140, 140);
        imgHScrollSlider = m_hScrollSliderImage[1];
        hScrollSliderStretch = m_hScrollSliderImageStretch[1];
    }

    // 垂直滑块
    QColor clrVScrollSlider = qRgb(180, 180, 180);
    QImage *imgVScrollSlider = m_vScrollSliderImage[0];
    QRect vScrollSliderStretch = m_vScrollSliderImageStretch[0];
    if (MouseStatus_VScrollSlider == m_mousePressStatus)
    {
        clrVScrollSlider = qRgb(100, 100, 100);
        imgVScrollSlider = m_vScrollSliderImage[2];
        vScrollSliderStretch = m_vScrollSliderImageStretch[2];
    }
    else if (MouseStatus_VScrollTop == m_mousePressStatus || MouseStatus_VScrollBottom == m_mousePressStatus
             || MouseStatus_VScroll == m_mousePressStatus
             || MouseStatus_VScrollSlider == m_mouseMoveStatus || MouseStatus_VScroll == m_mouseMoveStatus
             || MouseStatus_VScrollTop == m_mouseMoveStatus || MouseStatus_VScrollBottom == m_mouseMoveStatus)
    {
        clrVScrollSlider = qRgb(140, 140, 140);
        imgVScrollSlider = m_vScrollSliderImage[1];
        vScrollSliderStretch = m_vScrollSliderImageStretch[1];
    }

    // 水平左键
    QColor clrHScrollLeft = qRgb(220, 220, 220);
    QImage *imgHScrollLeft = m_hScrollLeftImage[0];
    if (MouseStatus_HScrollLeft == m_mousePressStatus)
    {
        clrHScrollLeft = qRgb(140, 140, 140);
        imgHScrollLeft = m_hScrollLeftImage[2];
    }
    else if (MouseStatus_HScrollRight == m_mousePressStatus || MouseStatus_HScrollSlider == m_mousePressStatus
                          || MouseStatus_HScroll == m_mousePressStatus
                          || MouseStatus_HScrollSlider == m_mouseMoveStatus || MouseStatus_HScroll == m_mouseMoveStatus
                          || MouseStatus_HScrollLeft == m_mouseMoveStatus || MouseStatus_HScrollRight == m_mouseMoveStatus)
    {
        clrHScrollLeft = qRgb(180, 180, 180);
        imgHScrollLeft = m_hScrollLeftImage[1];
    }

    // 水平右键
    QColor clrHScrollRight = qRgb(220, 220, 220);
    QImage *imgHScrollRight = m_hScrollRightImage[0];
    if (MouseStatus_HScrollRight == m_mousePressStatus)
    {
        clrHScrollRight = qRgb(140, 140, 140);
        imgHScrollRight = m_hScrollRightImage[2];
    }
    else if (MouseStatus_HScrollLeft == m_mousePressStatus || MouseStatus_HScrollSlider == m_mousePressStatus
             || MouseStatus_HScroll == m_mousePressStatus
             || MouseStatus_HScrollSlider == m_mouseMoveStatus || MouseStatus_HScroll == m_mouseMoveStatus
             || MouseStatus_HScrollLeft == m_mouseMoveStatus || MouseStatus_HScrollRight == m_mouseMoveStatus)
    {
        clrHScrollRight = qRgb(180, 180, 180);
        imgHScrollRight = m_hScrollRightImage[1];
    }

    // 垂直上键
    QColor clrVScrollTop = qRgb(220, 220, 220);
    QImage *imgVScrollTop = m_vScrollTopImage[0];
    if (MouseStatus_VScrollTop == m_mousePressStatus)
    {
        clrVScrollTop = qRgb(140, 140, 140);
        imgVScrollTop = m_vScrollTopImage[2];
    }
    else if (MouseStatus_VScrollSlider == m_mousePressStatus || MouseStatus_VScrollBottom == m_mousePressStatus
             || MouseStatus_VScroll == m_mousePressStatus
             || MouseStatus_VScrollSlider == m_mouseMoveStatus || MouseStatus_VScroll == m_mouseMoveStatus
             || MouseStatus_VScrollTop == m_mouseMoveStatus || MouseStatus_VScrollBottom == m_mouseMoveStatus)
    {
        clrVScrollTop = qRgb(180, 180, 180);
        imgVScrollTop = m_vScrollTopImage[1];
    }

    // 垂直下键
    QColor clrVScrollBottom = qRgb(220, 220, 220);
    QImage *imgVScrollBottom = m_vScrollBottomImage[0];
    if (MouseStatus_VScrollBottom == m_mousePressStatus)
    {
        clrVScrollBottom = qRgb(140, 140, 140);
        imgVScrollBottom = m_vScrollBottomImage[2];
    }
    else if (MouseStatus_VScrollSlider == m_mousePressStatus || MouseStatus_VScrollTop == m_mousePressStatus
             || MouseStatus_VScroll == m_mousePressStatus
             || MouseStatus_VScrollSlider == m_mouseMoveStatus || MouseStatus_VScroll == m_mouseMoveStatus
             || MouseStatus_VScrollTop == m_mouseMoveStatus || MouseStatus_VScrollBottom == m_mouseMoveStatus)
    {
        clrVScrollBottom = qRgb(180, 180, 180);
        imgVScrollBottom = m_vScrollBottomImage[1];
    }

    if (m_hScroll)
    {
        if (nullptr == imgHScroll)
            painter.fillRect(getHScrollPos(), clrHScroll);
        else
            DrawImage(painter, getHScrollPos(), imgHScroll, m_hScrollImageStretch);

        if (nullptr == imgHScrollLeft)
            painter.fillRect(getHScrollLeftPos(), clrHScrollLeft);
        else
            painter.drawImage(getHScrollLeftPos(), *imgHScrollLeft);

        if (nullptr == imgHScrollRight)
            painter.fillRect(getHScrollRightPos(), clrHScrollRight);
        else
            painter.drawImage(getHScrollRightPos(), *imgHScrollRight);

        if (nullptr == imgHScrollSlider)
            painter.fillRect(getHScrollSliderPos(), clrHScrollSlider);
        else
            DrawImage(painter, getHScrollSliderPos(), imgHScrollSlider, hScrollSliderStretch);
    }

    if (m_vScroll)
    {
        if (nullptr == imgVScroll)
            painter.fillRect(getVScrollPos(), clrVScroll);
        else
            DrawImage(painter, getVScrollPos(), imgVScroll, m_vScrollImageStretch);

        if (nullptr == imgVScrollTop)
            painter.fillRect(getVScrollTopPos(), clrVScrollTop);
        else
            painter.drawImage(getVScrollTopPos(), *imgVScrollTop);

        if (nullptr == imgVScrollBottom)
            painter.fillRect(getVScrollBottomPos(), clrVScrollBottom);
        else
            painter.drawImage(getVScrollBottomPos(), *imgVScrollBottom);

        if (nullptr == imgVScrollSlider)
            painter.fillRect(getVScrollSliderPos(), clrVScrollSlider);
        else
            DrawImage(painter, getVScrollSliderPos(), imgVScrollSlider, vScrollSliderStretch);
    }

    if (m_hScroll && m_vScroll)
    {
        if (nullptr == nullScrollImage)
            painter.fillRect(getNullScrollPos(), clrNullScroll);
        else
            painter.drawImage(getNullScrollPos(), *nullScrollImage);
    }
}

void HGImgThumb::reset()
{
    m_frameSelectionRectValid = false;
    m_frameSelection = false;

    m_curInsertPos = -1;
    m_insertPtValid = false;
    m_draging = false;

    m_pushItemIndex = -1;

    m_operateStartX = -1;
    m_operateStartY = -1;
    m_operate = 0;

    m_hitMouseButtons = Qt::NoButton;
    m_hitKeyboardModifiers = Qt::NoModifier;
    m_hitItemIndex = -1;

    m_mousePressStatus = MouseStatus_Null;
    m_mousePressBeginX = -1;
    m_mousePressBeginY = -1;
}

QPoint HGImgThumb::getItemPos(int index)
{
    assert(index >= 0 && index < (int)m_frontItems.size());
    assert(m_showThumb);

    int x, y;
    if (ThumbType_Hori == m_type)
    {
        x = m_gapSize + index * (m_itemSize + m_gapSize);
        y = m_gapSize;
    }
    else if (ThumbType_Vert == m_type)
    {
        x = m_gapSize;
        y = m_gapSize + index * (m_itemSize + m_itemTextHeight + m_gapSize);
    }
    else
    {
        int cols = round((m_thumbRect.right - m_thumbRect.left - m_gapSize) / (m_itemSize + m_gapSize));
        x = m_gapSize + (index % cols) * (m_itemSize + m_gapSize);
        y = m_gapSize + (index / cols) * (m_itemSize + m_itemTextHeight + m_gapSize);
    }

    QPoint pt(x, y);
    return pt;
}

void HGImgThumb::locateItem(int index)
{
    assert(index >= 0 && index < (int)m_frontItems.size());
    assert(m_showThumb);

    int left = getItemPos(index).x() + round(m_thumbRect.left);
    int top = getItemPos(index).y() + round(m_thumbRect.top);
    int right = left + m_itemSize;
    int bottom = top + m_itemSize + m_itemTextHeight;

    int scrollWidth;
    int gap;

    scrollWidth = m_vScroll ? m_scrollSize : 0;
    gap = m_gapSize;
    if (left < gap && right + (gap - left) <= (this->width() - scrollWidth - m_gapSize))
    {
        m_thumbRect.left += (gap - left);
        m_thumbRect.right += (gap - left);
    }
    else if (right > (this->width() - scrollWidth - gap)
             && left - (right - this->width() + scrollWidth + gap) >= m_gapSize)
    {
        m_thumbRect.left -= (right - this->width() + scrollWidth + gap);
        m_thumbRect.right -= (right - this->width() + scrollWidth + gap);
    }

    scrollWidth = m_hScroll ? m_scrollSize : 0;
    gap = m_gapSize;
    if (top < gap && bottom + (gap - top) <= (this->height() - scrollWidth - m_gapSize))
    {
        m_thumbRect.top += (gap - top);
        m_thumbRect.bottom += (gap - top);
    }
    else if (bottom > (this->height() - scrollWidth - gap)
             && top - (bottom - this->height() + scrollWidth + gap) >= m_gapSize)
    {
        m_thumbRect.top -= (bottom - this->height() + scrollWidth + gap);
        m_thumbRect.bottom -= (bottom - this->height() + scrollWidth + gap);
    }
}

void HGImgThumb::locateInsert(const QPoint &pt1, const QPoint &pt2)
{    
    int left = HGMIN(pt1.x(), pt2.x()) + round(m_thumbRect.left);
    int top = HGMIN(pt1.y(), pt2.y()) + round(m_thumbRect.top);
    int right = HGMAX(pt1.x(), pt2.x()) + round(m_thumbRect.left);
    int bottom = HGMAX(pt1.y(), pt2.y()) + round(m_thumbRect.top);

    int scrollWidth;
    int gap;

    scrollWidth = m_vScroll ? m_scrollSize : 0;
    gap = m_gapSize;
    if (left < gap && right + (gap - left) <= (this->width() - scrollWidth - m_gapSize))
    {
        int value = gap - left;
        m_thumbRect.left += value;
        m_thumbRect.right += value;
    }
    else if (right > (this->width() - scrollWidth - gap)
             && left - (right - this->width() + scrollWidth + gap) >= m_gapSize)
    {
        int value = right - this->width() + scrollWidth + gap;
        m_thumbRect.left -= value;
        m_thumbRect.right -= value;
    }

    scrollWidth = m_hScroll ? m_scrollSize : 0;
    gap = m_gapSize;
    if (top < gap && bottom + (gap - top) <= (this->height() - scrollWidth - m_gapSize))
    {
        int value = gap - top;
        m_thumbRect.top += value;
        m_thumbRect.bottom += value;
    }
    else if (bottom > (this->height() - scrollWidth - gap)
             && top - (bottom - this->height() + scrollWidth + gap) >= m_gapSize)
    {
        int value = bottom - this->height() + scrollWidth + gap;
        m_thumbRect.top -= value;
        m_thumbRect.bottom -= value;
    }
}

int HGImgThumb::getItemRow(int index)
{
    assert(index >= 0 && index < (int)m_frontItems.size());
    assert(m_showThumb);

    int row;
    if (ThumbType_Hori == m_type)
    {
        row = 0;
    }
    else if (ThumbType_Vert == m_type)
    {
        row = index;
    }
    else
    {
        int cols = round((m_thumbRect.right - m_thumbRect.left - m_gapSize) / (m_itemSize + m_gapSize));
        row = index / cols;
    }

    return row;
}

int HGImgThumb::getItemCol(int index)
{
    assert(index >= 0 && index < (int)m_frontItems.size());
    assert(m_showThumb);

    int col;
    if (ThumbType_Hori == m_type)
    {
        col = index;
    }
    else if (ThumbType_Vert == m_type)
    {
        col = 0;
    }
    else
    {
        int cols = round((m_thumbRect.right - m_thumbRect.left - m_gapSize) / (m_itemSize + m_gapSize));
        col = index % cols;
    }

    return col;
}

int HGImgThumb::getTotalRows()
{
    if (!m_showThumb)
    {
        assert(0 == m_frontItems.size());
        return 0;
    }

    int rows;
    if (ThumbType_Hori == m_type)
    {
        rows = 1;
    }
    else if (ThumbType_Vert == m_type)
    {
        rows = (int)m_frontItems.size();
    }
    else
    {
        rows = round((m_thumbRect.bottom - m_thumbRect.top - m_gapSize) / (m_itemSize + m_itemTextHeight + m_gapSize));
    }

    return rows;
}

int HGImgThumb::getTotalCols()
{
    if (!m_showThumb)
    {
        assert(0 == m_frontItems.size());
        return 0;
    }

    int cols;
    if (ThumbType_Hori == m_type)
    {
        cols = (int)m_frontItems.size();
    }
    else if (ThumbType_Vert == m_type)
    {
        cols = 1;
    }
    else
    {
        cols = round((m_thumbRect.right - m_thumbRect.left - m_gapSize) / (m_itemSize + m_gapSize));
    }

    return cols;
}

int HGImgThumb::getRowCount(int row)
{
    assert(row >= 0 && row < getTotalRows());

    int count;
    if (ThumbType_Hori == m_type)
    {
        count = (int)m_frontItems.size();
    }
    else if (ThumbType_Vert == m_type)
    {
        count = 1;
    }
    else
    {
        int cols = round((m_thumbRect.right - m_thumbRect.left - m_gapSize) / (m_itemSize + m_gapSize));
        if ((row + 1) * cols <= (int)m_frontItems.size())
        {
            count = cols;
        }
        else
        {
            count = (int)m_frontItems.size() - row * cols;
        }
    }

    return count;
}

int HGImgThumb::getItemIndex(const QPoint &pt, MouseStatus &mouseStatus)
{
    mouseStatus = MouseStatus_Null;
    if (!m_showThumb)
    {
        assert(0 == m_frontItems.size());
        return -1;
    }

    if (MouseStatus_Null != m_mousePressStatus || 0 != m_operate || m_draging || m_frameSelection)
    {
        return -1;
    }

    if (!m_mouseOn)
    {
        return -1;
    }

    if (m_hScroll && m_vScroll)
    {
        if (getHScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_HScrollSlider;
        else if (getHScrollLeftPos().contains(pt))
            mouseStatus = MouseStatus_HScrollLeft;
        else if (getHScrollRightPos().contains(pt))
            mouseStatus = MouseStatus_HScrollRight;
        else if (getHScrollPos().contains(pt))
            mouseStatus = MouseStatus_HScroll;
        else if (getVScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_VScrollSlider;
        else if (getVScrollTopPos().contains(pt))
            mouseStatus = MouseStatus_VScrollTop;
        else if (getVScrollBottomPos().contains(pt))
            mouseStatus = MouseStatus_VScrollBottom;
        else if (getVScrollPos().contains(pt))
            mouseStatus = MouseStatus_VScroll;
        else if (getNullScrollPos().contains(pt))
            mouseStatus = MouseStatus_NullScroll;
    }
    else if (m_hScroll && !m_vScroll)
    {
        if (getHScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_HScrollSlider;
        else if (getHScrollLeftPos().contains(pt))
            mouseStatus = MouseStatus_HScrollLeft;
        else if (getHScrollRightPos().contains(pt))
            mouseStatus = MouseStatus_HScrollRight;
        else if (getHScrollPos().contains(pt))
            mouseStatus = MouseStatus_HScroll;
    }
    else if (!m_hScroll && m_vScroll)
    {
        if (getVScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_VScrollSlider;
        else if (getVScrollTopPos().contains(pt))
            mouseStatus = MouseStatus_VScrollTop;
        else if (getVScrollBottomPos().contains(pt))
            mouseStatus = MouseStatus_VScrollBottom;
        else if (getVScrollPos().contains(pt))
            mouseStatus = MouseStatus_VScroll;
    }

    if (MouseStatus_Null != mouseStatus)
    {
        return -1;
    }

    int index = -1;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        int left = getItemPos(i).x() + round(m_thumbRect.left);
        int top = getItemPos(i).y() + round(m_thumbRect.top);
        int right = left + m_itemSize;
        int bottom = top + m_itemSize + m_itemTextHeight;
        if (pt.x() >= left && pt.y() >= top && pt.x() < right && pt.y() < bottom)
        {
            index = i;
            break;
        }
    }

    return index;
}

int HGImgThumb::getInsertPos(const QPoint &pt, bool &get, QPoint &pt1, QPoint &pt2)
{
    get = false;
    if (!m_draging)
    {
        return -1;
    }

    MouseStatus mouseStatus = MouseStatus_Null;
    if (m_hScroll && m_vScroll)
    {
        if (getHScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_HScrollSlider;
        else if (getHScrollLeftPos().contains(pt))
            mouseStatus = MouseStatus_HScrollLeft;
        else if (getHScrollRightPos().contains(pt))
            mouseStatus = MouseStatus_HScrollRight;
        else if (getHScrollPos().contains(pt))
            mouseStatus = MouseStatus_HScroll;
        else if (getVScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_VScrollSlider;
        else if (getVScrollTopPos().contains(pt))
            mouseStatus = MouseStatus_VScrollTop;
        else if (getVScrollBottomPos().contains(pt))
            mouseStatus = MouseStatus_VScrollBottom;
        else if (getVScrollPos().contains(pt))
            mouseStatus = MouseStatus_VScroll;
        else if (getNullScrollPos().contains(pt))
            mouseStatus = MouseStatus_NullScroll;
    }
    else if (m_hScroll && !m_vScroll)
    {
        if (getHScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_HScrollSlider;
        else if (getHScrollLeftPos().contains(pt))
            mouseStatus = MouseStatus_HScrollLeft;
        else if (getHScrollRightPos().contains(pt))
            mouseStatus = MouseStatus_HScrollRight;
        else if (getHScrollPos().contains(pt))
            mouseStatus = MouseStatus_HScroll;
    }
    else if (!m_hScroll && m_vScroll)
    {
        if (getVScrollSliderPos().contains(pt))
            mouseStatus = MouseStatus_VScrollSlider;
        else if (getVScrollTopPos().contains(pt))
            mouseStatus = MouseStatus_VScrollTop;
        else if (getVScrollBottomPos().contains(pt))
            mouseStatus = MouseStatus_VScrollBottom;
        else if (getVScrollPos().contains(pt))
            mouseStatus = MouseStatus_VScroll;
    }

    if (MouseStatus_Null != mouseStatus)
    {
        return -1;
    }

    if (!m_showThumb)
    {
        assert(0 == m_frontItems.size());
        return 0;
    }

    int pos = -1;
    int x1, x2, y1, y2;

    if (ThumbType_Hori == m_type)
    {
        pos = (int)m_frontItems.size();

        QPoint pt2 = getItemPos(pos - 1);
        x1 = x2 = pt2.x() + m_itemSize + m_gapSize / 2;
        y1 = pt2.y();
        y2 = y1 + m_itemSize + m_itemTextHeight;

        for (int i = 0; i < (int)m_frontItems.size(); ++i)
        {
            QPoint pt2 = getItemPos(i);

            int left = pt2.x();
            int right = left + m_itemSize;
            if (pt.x() - round(m_thumbRect.left) < (left + right) / 2)
            {
                pos = i;

                x1 = x2 = pt2.x() - m_gapSize / 2;
                y1 = pt2.y();
                y2 = y1 + m_itemSize + m_itemTextHeight;
                break;
            }
        }
    }
    else if (ThumbType_Vert == m_type)
    {
        pos = (int)m_frontItems.size();

        QPoint pt2 = getItemPos(pos - 1);
        y1 = y2 = pt2.y() + m_itemSize + m_itemTextHeight + m_gapSize / 2;
        x1 = pt2.x();
        x2 = x1 + m_itemSize;

        for (int i = 0; i < (int)m_frontItems.size(); ++i)
        {
            QPoint pt2 = getItemPos(i);

            int top = pt2.y();
            int bottom = top + m_itemSize + m_itemTextHeight;
            if (pt.y() - round(m_thumbRect.top) < (top + bottom) / 2)
            {
                pos = i;

                y1 = y2 = pt2.y() - m_gapSize / 2;
                x1 = pt2.x();
                x2 = x1 + m_itemSize;
                break;
            }
        }
    }
    else
    {
        int rows = getTotalRows();
        int cols = getTotalCols();

        int row = rows;
        for (int i = 0; i < rows; ++i)
        {
            QPoint pt2 = getItemPos(cols * i);

            int top = pt2.y();
            int bottom = top + m_itemSize + m_itemTextHeight;
            if (pt.y() - round(m_thumbRect.top) < bottom + m_gapSize / 2)
            {
                row = i;
                break;
            }
        }

        if (row == rows)
        {
            pos = (int)m_frontItems.size();

            QPoint pt2 = getItemPos(pos - 1);
            x1 = x2 = pt2.x() + m_itemSize + m_gapSize / 2;
            y1 = pt2.y();
            y2 = y1 + m_itemSize + m_itemTextHeight;
        }
        else
        {
            pos = row * cols + getRowCount(row);

            QPoint pt2 = getItemPos(row * cols + getRowCount(row) - 1);
            x1 = x2 = pt2.x() + m_itemSize + m_gapSize / 2;
            y1 = pt2.y();
            y2 = y1 + m_itemSize + m_itemTextHeight;

            for (int i = 0; i < getRowCount(row); ++i)
            {
                QPoint pt2 = getItemPos(row * cols + i);

                int left = pt2.x();
                int right = left + m_itemSize;
                if (pt.x() - round(m_thumbRect.left) < (left + right) / 2)
                {
                    pos = row * cols + i;

                    x1 = x2 = pt2.x() - m_gapSize / 2;
                    y1 = pt2.y();
                    y2 = y1 + m_itemSize + m_itemTextHeight;
                    break;
                }
            }
        }
    }

    assert(-1 != pos);
    get = true;
    pt1.setX(x1);
    pt1.setY(y1);
    pt2.setX(x2);
    pt2.setY(y2);
    return pos;
}

int HGImgThumb::findIndex(const QString &fileName)
{
    int index = -1;
    for (int i = 0; i < (int)m_frontItems.size(); ++i)
    {
        if (0 == m_frontItems[i]->fileName.compare(fileName))
        {
            index = i;
            break;
        }
    }

    return index;
}

QRect HGImgThumb::getHScrollLeftPos()
{
    assert(m_hScroll);

    return QRect(0, this->height() - m_scrollSize, m_scrollSize, m_scrollSize);
}

QRect HGImgThumb::getHScrollRightPos()
{
    assert(m_hScroll);

    if (!m_vScroll)
    {
        return QRect(this->width() - m_scrollSize, this->height() - m_scrollSize, m_scrollSize, m_scrollSize);
    }

    return QRect(this->width() - 2 * m_scrollSize, this->height() - m_scrollSize, m_scrollSize, m_scrollSize);
}

QRect HGImgThumb::getHScrollPos()
{
    assert(m_hScroll);

    if (!m_vScroll)
    {
        return QRect(0, this->height() - m_scrollSize, this->width(), m_scrollSize);
    }

    return QRect(0, this->height() - m_scrollSize, this->width() - m_scrollSize, m_scrollSize);
}

QRect HGImgThumb::getHScrollSliderPos()
{
    assert(m_hScroll);

    QRect rect;
    rect.setY(this->height() - m_scrollSize);
    rect.setHeight(m_scrollSize);
    if (!m_vScroll)
    {
        int rollTotalLen = this->width() - 2 * m_scrollSize;
        int rollLeft = round((double)rollTotalLen * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left));
        int rollRight = round((double)rollTotalLen * (-m_thumbRect.left + this->width()) / (double)(m_thumbRect.right - m_thumbRect.left));
        int rollLen = rollRight - rollLeft;
        if (rollLen < m_minScrollSliderSize)
        {
            rollLen = m_minScrollSliderSize;
            rollLeft = round((double)(rollTotalLen - m_minScrollSliderSize) * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left - this->width()));
        }

        rect.setX(rollLeft + m_scrollSize);
        rect.setWidth(rollLen);
    }
    else
    {
        int rollTotalLen = this->width() - 3 * m_scrollSize;
        int rollLeft = round((double)rollTotalLen * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left));
        int rollRight = round((double)rollTotalLen * (-m_thumbRect.left + this->width() - m_scrollSize) / (double)(m_thumbRect.right - m_thumbRect.left));
        int rollLen = rollRight - rollLeft;
        if (rollLen < m_minScrollSliderSize)
        {
            rollLen = m_minScrollSliderSize;
            rollLeft = round((double)(rollTotalLen - m_minScrollSliderSize) * (-m_thumbRect.left) / (double)(m_thumbRect.right - m_thumbRect.left - this->width() + m_scrollSize));
        }

        rect.setX(rollLeft + m_scrollSize);
        rect.setWidth(rollLen);
    }

    return rect;
}

QRect HGImgThumb::getVScrollTopPos()
{
    assert(m_vScroll);

    return QRect(this->width() - m_scrollSize, 0, m_scrollSize, m_scrollSize);
}

QRect HGImgThumb::getVScrollBottomPos()
{
    assert(m_vScroll);

    if (!m_hScroll)
    {
        return QRect(this->width() - m_scrollSize, this->height() - m_scrollSize, m_scrollSize, m_scrollSize);
    }

    return QRect(this->width() - m_scrollSize, this->height() - 2 * m_scrollSize, m_scrollSize, m_scrollSize);
}

QRect HGImgThumb::getVScrollPos()
{
    assert(m_vScroll);

    if (!m_hScroll)
    {
        return QRect(this->width() - m_scrollSize, 0, m_scrollSize, this->height());
    }

    return QRect(this->width() - m_scrollSize, 0, m_scrollSize, this->height() - m_scrollSize);
}

QRect HGImgThumb::getVScrollSliderPos()
{
    assert(m_vScroll);

    QRect rect;
    rect.setX(this->width() - m_scrollSize);
    rect.setWidth(m_scrollSize);
    if (!m_hScroll)
    {
        int rollTotalLen = this->height() - 2 * m_scrollSize;
        int rollTop = round((double)rollTotalLen * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top));
        int rollBottom = round((double)rollTotalLen * (-m_thumbRect.top + this->height()) / (double)(m_thumbRect.bottom - m_thumbRect.top));
        int rollLen = rollBottom - rollTop;
        if (rollLen < m_minScrollSliderSize)
        {
            rollLen = m_minScrollSliderSize;
            rollTop = round((double)(rollTotalLen - m_minScrollSliderSize) * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top - this->height()));
        }

        rect.setY(rollTop + m_scrollSize);
        rect.setHeight(rollLen);
    }
    else
    {
        int rollTotalLen = this->height() - 3 * m_scrollSize;
        int rollTop = round((double)rollTotalLen * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top));
        int rollBottom = round((double)rollTotalLen * (-m_thumbRect.top + this->height() - m_scrollSize) / (double)(m_thumbRect.bottom - m_thumbRect.top));
        int rollLen = rollBottom - rollTop;
        if (rollLen < m_minScrollSliderSize)
        {
            rollLen = m_minScrollSliderSize;
            rollTop = round((double)(rollTotalLen - m_minScrollSliderSize) * (-m_thumbRect.top) / (double)(m_thumbRect.bottom - m_thumbRect.top - this->height() + m_scrollSize));
        }

        rect.setY(rollTop + m_scrollSize);
        rect.setHeight(rollLen);
    }

    return rect;
}

QRect HGImgThumb::getNullScrollPos()
{
    assert(m_hScroll && m_vScroll);
    return QRect(this->width() - m_scrollSize, this->height() - m_scrollSize, m_scrollSize, m_scrollSize);
}

void HGImgThumb::Show()
{
    repaint();
}

void HGAPI HGImgThumb::ThreadFunc(HGThread thread, HGPointer param)
{
    Q_UNUSED(thread);

    HGImgThumb *p = (HGImgThumb *)param;
    while (!p->m_stopThread)
    {
        QString fileName;

        HGBase_EnterLock(p->m_lockBack);
        int count = (int)p->m_backList.size();
        if (count > 0)
        {
            fileName = *p->m_backList.begin();
            p->m_backList.erase(p->m_backList.begin());
            --count;
        }
        HGBase_LeaveLock(p->m_lockBack);

        if (!fileName.isEmpty())
        {
            HGImage image = nullptr;
            HGImgFmt_LoadImage(getStdString(fileName).c_str(), 0, nullptr, HGBASE_IMGTYPE_RGB, HGBASE_IMGORIGIN_TOP, &image);
            if (nullptr != image)
            {
                HGBase_EnterLock(p->m_lockItemSize);
                int itemSize = p->m_itemSize;
                HGBase_LeaveLock(p->m_lockItemSize);
                QImage *img = createItemImage(image, itemSize);
                if (nullptr != img)
                {
                    HGImageInfo imgInfo;
                    HGBase_GetImageInfo(image, &imgInfo);
                    HGBase_EnterLock(p->m_lockFront);
                    int index = p->findIndex(fileName);
                    if (-1 != index)
                    {
                        p->m_frontItems[index]->width = imgInfo.width;
                        p->m_frontItems[index]->height = imgInfo.height;
                        delete p->m_frontItems[index]->image;
                        p->m_frontItems[index]->image = img;
                    }
                    HGBase_LeaveLock(p->m_lockFront);
                    // 通知UI线程更新
                    emit p->updateItem();
                }

                HGBase_DestroyImage(image);
            }
        }

        if (0 == count)
        {
            HGBase_WaitEvent(p->m_event);
        }
    }
}