qt5base-lts/tests/manual/dialogs/printdialogpanel.h

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#ifndef PRINTDIALOGPANEL_H
#define PRINTDIALOGPANEL_H

#ifndef QT_NO_PRINTER

#include "ui_printdialogpanel.h"

#if QT_VERSION >= 0x050300
#include <QPageLayout>
#endif
#include <QPrinter>
#include <QWidget>

QT_BEGIN_NAMESPACE
class QPrinter;
class QComboBox;
class QGroupBox;
class QPushButton;
class QCheckBox;
QT_END_NAMESPACE

class PageSizeControl;
class OptionsControl;

#if QT_VERSION < 0x050300
// Copied from class QPageLayout introduced in Qt 5.3
namespace QPageLayout
{
    enum Unit {
        Millimeter,
        Point,
        Inch,
        Pica,
        Didot,
        Cicero
    };

    enum Orientation {
        Portrait,
        Landscape
    };

    enum Mode {
        StandardMode,  // Paint Rect includes margins
        FullPageMode   // Paint Rect excludes margins
    };
}
#endif

class PrintDialogPanel  : public QWidget
{
    Q_OBJECT
public:
    explicit PrintDialogPanel(QWidget *parent = 0);
    ~PrintDialogPanel();

private slots:
    void createPrinter();
    void deletePrinter();
    void showPrintDialog();
    void showPreviewDialog();
    void showPageSetupDialog();
    void unitsChanged();
    void pageSizeChanged();
    void pageDimensionsChanged();
    void orientationChanged();
    void marginsChanged();
    void layoutModeChanged();
    void printerChanged();

private:
    QSizeF customPageSize() const;
    void applySettings(QPrinter *printer) const;
    void retrieveSettings(const QPrinter *printer);
    void updatePageLayoutWidgets();
    void enablePanels();

    bool m_blockSignals;
    Ui::PrintDialogPanel m_panel;

#if QT_VERSION >= 0x050300
    QPageLayout m_pageLayout;
#else
    QPrinter m_printerLayout;
    QPrinter::Unit m_units;
#endif
    QScopedPointer<QPrinter> m_printer;
};

#endif // !QT_NO_PRINTER
#endif // PRINTDIALOGPANEL_H