code_app/app/scantool/dialog_scan.h

#ifndef DIALOG_SCAN_H
#define DIALOG_SCAN_H

#include <QDialog>
#include <vector>
#include "sane/sane_ex.h"
#include "sane/sane_option_definitions.h"
#include "base/HGImage.h"
#include "base/HGThread.h"
#include "base/HGMsgPump.h"
#include "imgfmt/HGImgFmt.h"
#include "mainwindow.h"

namespace Ui {
class Dialog_Scan;
}

class Dialog_Scan : public QDialog
{
    Q_OBJECT

    friend class MainWindow;
public:
    explicit Dialog_Scan(class MainWindow *mainWnd);
    ~Dialog_Scan();

private:
    void StartScan(unsigned int buttonId);
    void StopScan();
    void SaveImage(HGImage image);
    static int sane_ex_callback(SANE_Handle hdev, int code, void* data, unsigned int* len, void* param);
    static void HGAPI ocrThreadFunc(HGThread thread, HGPointer param);
    static void HGAPI ocrMsgPumpFunc(HGMsgPump msgPump, const HGMsg* msg, HGPointer param);

protected:
    virtual void closeEvent(QCloseEvent *e) override;

signals:
    void deviceArrive(QString devName);
    void deviceRemove(QString devName);
    void keyPress(unsigned int buttonId);
    void scanWorking();
    void scanInfo(QString info, bool error);
    void scanImage(unsigned int count);
    void scanFinish();

private slots:
    void on_deviceArrive(QString devName);
    void on_deviceRemove(QString devName);
    void on_keyPress(unsigned int buttonId);
    void on_scanWorking();
    void on_scanInfo(QString info, bool error);
    void on_scanImage(unsigned int count);
    void on_scanFinish();

    void on_comboBox_currentIndexChanged(const QString &arg1);

    void on_pushButtonScan_clicked();

private:
    Ui::Dialog_Scan *ui;
    class MainWindow *m_mainWnd;
    QString m_devName;
    SANE_Handle m_devHandle;
    bool m_scanning;
    HGUInt m_dpi;

    QString m_scanFileName;
    HGImgFmtWriter m_scanImgFmtWriter;
    SaveParam m_aquireIntoSaveParam;
    bool m_aquireIntoInBlank;
    int m_aquireIntoBatchStartIndex;
    int m_aquireIntoPageIndex;
    int m_aquireIntoMultiPageCount;
    HGMsgPump m_ocrMsgPump;
    HGThread m_ocrThread;
};

#endif // DIALOG_SCAN_H