qprintpreviewwidget.h

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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#ifndef QPRINTPREVIEWWIDGET_H
#define QPRINTPREVIEWWIDGET_H
 
#include <QtPrintSupport/qtprintsupportglobal.h>
#include <QtWidgets/qwidget.h>
#include <QtPrintSupport/qprinter.h>
 
QT_REQUIRE_CONFIG(printpreviewwidget);
 
QT_BEGIN_NAMESPACE
 
 
class QPrintPreviewWidgetPrivate;
 
class Q_PRINTSUPPORT_EXPORT QPrintPreviewWidget : public QWidget
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(QPrintPreviewWidget)
public:
 
    enum ViewMode {
        SinglePageView,
        FacingPagesView,
        AllPagesView
    };
 
    enum ZoomMode {
        CustomZoom,
        FitToWidth,
        FitInView
    };
 
    explicit QPrintPreviewWidget(QPrinter *printer, QWidget *parent = nullptr,
                                 Qt::WindowFlags flags = Qt::WindowFlags());
    explicit QPrintPreviewWidget(QWidget *parent = nullptr, Qt::WindowFlags flags = Qt::WindowFlags());
    ~QPrintPreviewWidget();
 
    qreal zoomFactor() const;
    QPageLayout::Orientation orientation() const;
    ViewMode viewMode() const;
    ZoomMode zoomMode() const;
    int currentPage() const;
    int pageCount() const;
    void setVisible(bool visible) override;
 
public Q_SLOTS:
    void print();
 
    void zoomIn(qreal zoom = 1.1);
    void zoomOut(qreal zoom = 1.1);
    void setZoomFactor(qreal zoomFactor);
    void setOrientation(QPageLayout::Orientation orientation);
    void setViewMode(ViewMode viewMode);
    void setZoomMode(ZoomMode zoomMode);
    void setCurrentPage(int pageNumber);
 
    void fitToWidth();
    void fitInView();
    void setLandscapeOrientation();
    void setPortraitOrientation();
    void setSinglePageViewMode();
    void setFacingPagesViewMode();
    void setAllPagesViewMode();
 
    void updatePreview();
 
Q_SIGNALS:
    void paintRequested(QPrinter *printer);
    void previewChanged();
 
private:
    Q_PRIVATE_SLOT(d_func(), void _q_fit())
    Q_PRIVATE_SLOT(d_func(), void _q_updateCurrentPage())
};
 
QT_END_NAMESPACE
 
#endif // QPRINTPREVIEWWIDGET_H