code_app/app/scanner/widget_statusbar.cpp

#include "widget_statusbar.h"
#include "ui_widget_statusbar.h"
#include <QToolBar>

Widget_StatusBar::Widget_StatusBar(QAction *zoomIn, QAction *zoomOut, QWidget *parent) :
    QWidget(parent),
    ui(new Ui::Widget_StatusBar)
{
    ui->setupUi(this);

    ui->lbl_devSts->installEventFilter(this);

    QToolBar *toolBar = new QToolBar(this);
    toolBar->setFixedHeight(20);

    m_lbl_scale = new QLabel("0%", toolBar);
    m_lbl_scale->setFixedWidth(40);
    m_lbl_scale->setAlignment(Qt::AlignHCenter);

    toolBar->addAction(zoomIn);
    toolBar->addWidget(m_lbl_scale);
    toolBar->addAction(zoomOut);
    reinterpret_cast<QHBoxLayout*>(this->layout())->addWidget(toolBar, 0, Qt::AlignRight);

    ui->lbl_page->setText(tr("page"));
    ui->lbl_size->setText(tr("size"));
    ui->lbl_mousePos->setText(tr("mousePos"));
    m_lbl_scale->setText(tr("zoom"));
}

Widget_StatusBar::~Widget_StatusBar()
{
    qDebug("~Widget_StatusBar");

    delete ui;
}

void Widget_StatusBar::setPageInfo(int total, int page)
{
    ui->lbl_page->setText(QString("%1/%2").arg(page + 1).arg(total));
}

void Widget_StatusBar::setPixelInfo(int width, int height, int bpp)
{
    ui->lbl_size->setText(QString("%1*%2*%3").arg(width).arg(height).arg(bpp));
}

void Widget_StatusBar::setMousePosInfo(int x, int y)
{
    ui->lbl_mousePos->setText(QString("X:%1, Y:%2").arg(x).arg(y));
}

void Widget_StatusBar::setScale(double scale)
{
    m_lbl_scale->setText(QString("%1%").arg((int)(scale * 100.0)));
}

void Widget_StatusBar::setDeviceStatusInfo(const QString &info, bool err)
{
    ui->lbl_devSts->setText(info);

    if (err)
    {
        QPalette pe;
        pe.setColor(QPalette::WindowText, Qt::red);
        ui->lbl_devSts->setPalette(pe);
    }
    else
    {
        QPalette pe;
        pe.setColor(QPalette::WindowText, Qt::black);
        ui->lbl_devSts->setPalette(pe);
    }
}

bool Widget_StatusBar::eventFilter(QObject* obj, QEvent* event)
{
    if (obj == ui->lbl_devSts)
    {
        if (event->type() == QEvent::MouseButtonDblClick)
        {
            emit statusInfoDblClick();
            return true;
        }

    }

    return false;
}