code_app/modules/twainui/dialog_progress_ui.cpp

#include "Manager.h"
#include "dialog_progress_ui.h"
#include "ui_dialog_progress_ui.h"
#include "lang/app_language.h"
#include "huagao/hgscanner_error.h"
#include <QKeyEvent>
#include <QTimer>
#include <thread>

extern Manager* g_manager;
static int imageRecivedCount = 0;

Dialog_progress_ui::Dialog_progress_ui(class Manager *mgr, std::function<void (ui_result)> callback, std::function<void (int, void *, int)> *notify, QWidget *parent) :
    QDialog(parent),
    ui(new Ui::Dialog_progress_ui)
  , m_isScanning(false)
{
    setAttribute(Qt::WA_DeleteOnClose, true);

    ui->setupUi(this);

    setWindowFlags(Qt::SubWindow | Qt::Popup | Qt::WindowStaysOnTopHint);

    ui->pbtn_cancelScan->setVisible(false);
    ui->pbtn_close->setVisible(false);
    ui->label->setText(tr("start scanning"));

    ui->label_imgRecived->setVisible(false);
    ui->lineEdit_imgRecived->setVisible(false);
    ui->label_totalImgRecived->setVisible(false);
    ui->lineEdit_imgRecived->setText(QString::number(imageRecivedCount));

    m_mgr = mgr;
    m_callback = callback;
    *notify = FuncNotify;

    m_timer = new QTimer(this);

    connect(this, SIGNAL(scan_status(QString,bool)), this, SLOT(on_scan_status(QString,bool)), Qt::QueuedConnection);
    connect(this, SIGNAL(scan_finish(int, QString)), this, SLOT(on_scan_finish(int, QString)), Qt::QueuedConnection);
    connect(this, SIGNAL(image_recived()), this, SLOT(on_image_recived()), Qt::QueuedConnection);
}

Dialog_progress_ui::~Dialog_progress_ui()
{
    m_mgr->m_progressUi = nullptr;

    imageRecivedCount = 0;

    delete ui;
}

void Dialog_progress_ui::keyPressEvent(QKeyEvent *e)
{
    if (e->key() == Qt::Key_Escape)
    {
        e->ignore();
    }
}

void Dialog_progress_ui::on_pbtn_cancelScan_clicked()
{
    if (!quit_)
        m_callback(UI_RESULT_CLOSE_CANCEL);
    ui->pbtn_cancelScan->setVisible(false);
    ui->label->setText(tr("stop scanning"));
}

void notify_close(std::function<void (ui_result)> callback)
{
    std::this_thread::sleep_for(std::chrono::milliseconds(500));
    if (callback)
        callback(UI_RESULT_CLOSE_NORMAL);
}

void Dialog_progress_ui::on_pbtn_close_clicked()
{
    disconnect(m_timer, SIGNAL(timeout()), this, SLOT(on_pbtn_close_clicked()));
    //CloseHandle(CreateThread(NULL, 0, notify_close, (void*)m_callback, 0, 0));
    if (!quit_)
    {
        std::thread th_close(notify_close, m_callback);
        th_close.detach();
    }
//    m_callback(UI_RESULT_CLOSE_NORMAL);
    close();
}

void Dialog_progress_ui::on_scan_status(QString finishInfo, bool isScanning)
{
    m_isScanning = isScanning;

    ui->label_imgRecived->setVisible(isScanning);
    ui->lineEdit_imgRecived->setVisible(isScanning);

    ui->label->setText(finishInfo);
    ui->pbtn_cancelScan->setVisible(isScanning);
    ui->pbtn_close->setVisible(!isScanning);
}

void Dialog_progress_ui::on_scan_finish(int flag, QString finishInfo)
{
    on_scan_status(finishInfo, false);

    ui->label_totalImgRecived->setVisible(true);
    ui->label_totalImgRecived->setText(tr("Total scanned images: %1").arg(QString::number(imageRecivedCount)));

    if (SCANNER_ERR_OK == flag || SCANNER_ERR_USER_CANCELED == flag)
    {
        m_timer->start(1000);
        connect(m_timer, SIGNAL(timeout()), this, SLOT(on_pbtn_close_clicked()), Qt::QueuedConnection);
    }
}

void Dialog_progress_ui::on_image_recived()
{
    ui->lineEdit_imgRecived->setText(QString::number(++imageRecivedCount));
}

void Dialog_progress_ui::FuncNotify(int event, void *msg, int flag)
{
    Dialog_progress_ui *p = (Dialog_progress_ui *)g_manager->m_progressUi;
    if (nullptr == p)
    {
        return;
    }

    switch (event)
    {
        case SANE_EVENT_WORKING:
        {
            QString finishInfo((char*)msg);
            emit p->scan_status(finishInfo, true);
        }
        break;

        case SANE_EVENT_SCAN_FINISHED:
        {
            QString finishInfo((char*)msg);
            emit p->scan_finish(flag, finishInfo);
        }
        break;

        case SANE_EVENT_IMAGE_OK:
        {
            emit p->image_recived();
        }
        break;
    }
}