KoCanvasControllerWidget.h

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/* This file is part of the KDE project
 * SPDX-FileCopyrightText: 2006, 2008 Thomas Zander <zander@kde.org>
 * SPDX-FileCopyrightText: 2007-2010 Boudewijn Rempt <boud@valdyas.org>
 * SPDX-FileCopyrightText: 2007-2008 C. Boemann <cbo@boemann.dk>
 * SPDX-FileCopyrightText: 2006-2007 Jan Hambrecht <jaham@gmx.net>
 * SPDX-FileCopyrightText: 2009 Thorsten Zachmann <zachmann@kde.org>
 *
 * SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
#ifndef KOCANVASCONTROLLERWIDGET_H
#define KOCANVASCONTROLLERWIDGET_H
 
#include "kritaui_export.h"
 
#include <optional>
#include <QAbstractScrollArea>
#include <QPointer>
#include "KoCanvasController.h"
#include <KoZoomMode.h>
 
class KoShape;
class KoCanvasBase;
class KoCanvasSupervisor;
class KisCanvasState;
class KoViewTransformStillPoint;
 
class KRITAUI_EXPORT KoCanvasControllerWidget : public QAbstractScrollArea, public KoCanvasController
{
    Q_OBJECT
public:
 
    explicit KoCanvasControllerWidget(KisKActionCollection * actionCollection, KoCanvasSupervisor *observerProvider, QWidget *parent = 0);
    ~KoCanvasControllerWidget() override;
 
    void scrollContentsBy(int dx, int dy) override;
 
 
    virtual void activate();
 
    void setCanvas(KoCanvasBase *canvas) override;
 
    KoCanvasBase *canvas() const override;
 
    virtual void changeCanvasWidget(QWidget *widget);
 
    void setToolOptionWidgets(const QList<QPointer<QWidget> > &widgets);
 
    void zoomTo(const QRect &rect) override;
 
    void setZoom(KoZoomMode::Mode mode, qreal zoom) override;
    void setZoom(KoZoomMode::Mode mode, qreal zoom, qreal resolutionX, qreal resolutionY);
 
    void setZoom(KoZoomMode::Mode mode, qreal zoom, const KoViewTransformStillPoint &stillPoint);
    void setZoom(KoZoomMode::Mode mode, qreal zoom, qreal resolutionX, qreal resolutionY, const std::optional<KoViewTransformStillPoint> &docStillPoint);
 
 
    void pan(const QPoint &distance) override;
 
    virtual void panUp() override;
    virtual void panDown() override;
    virtual void panLeft() override;
    virtual void panRight() override;
 
    QPoint scrollBarValue() const override;
 
    void setScrollBarValue(const QPoint &value) override;
 
    virtual KisCanvasState canvasState() const = 0;
 
    class Private;
    KoCanvasControllerWidget::Private *priv();
 
protected:
    friend class KisZoomAndPanTest;
 
    void paintEvent(QPaintEvent *event) override;
    void resizeEvent(QResizeEvent *resizeEvent) override;
    void dragEnterEvent(QDragEnterEvent *event) override;
    void dropEvent(QDropEvent *event) override;
    void dragMoveEvent(QDragMoveEvent *event) override;
    void dragLeaveEvent(QDragLeaveEvent *event) override;
    bool focusNextPrevChild(bool next) override;
    bool viewportEvent(QEvent *event) override;
 
    virtual void updateCanvasOffsetInternal(const QPointF &newOffset) = 0;
    virtual void updateCanvasWidgetSizeInternal(const QSize &newSize) = 0;
    virtual void updateCanvasZoomInternal(KoZoomMode::Mode mode, qreal zoom, qreal resolutionX, qreal resolutionY, const std::optional<KoViewTransformStillPoint> &docStillPoint) = 0;
    virtual void zoomToInternal(const QRect &viewRect) = 0;
 
    void emitSignals(const KisCanvasState &oldState, const KisCanvasState &newState);
 
private:
    Q_PRIVATE_SLOT(d, void activate())
 
    Private * const d;
};
 
#endif