overviewwidget.h

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/*
 *  SPDX-FileCopyrightText: 2009 Cyrille Berger <cberger@cberger.net>
 *  SPDX-FileCopyrightText: 2014 Sven Langkamp <sven.langkamp@gmail.com>
 *
 *  SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 
#ifndef OVERVIEWWIDGET_H
#define OVERVIEWWIDGET_H
#include <QObject>
#include <QWidget>
#include <QPixmap>
 
#include "KisWidgetWithIdleTask.h"
 
#include <kis_canvas2.h>
 
class KisSignalCompressor;
class KoCanvasBase;
 
class OverviewWidget : public KisWidgetWithIdleTask<QWidget>
{
    Q_OBJECT
 
public:
    OverviewWidget(QWidget * parent = 0);
 
    ~OverviewWidget() override;
 
    void setCanvas(KisCanvas2 *canvas) override;
 
    inline bool isDragging() const
    {
        return m_dragging;
    }
 
public Q_SLOTS:
    void startUpdateCanvasProjection();
    void updateThumbnail(QImage pixmap);
    void slotThemeChanged();
 
Q_SIGNALS:
    void signalDraggingStarted();
    void signalDraggingFinished();
 
protected:
    void resizeEvent(QResizeEvent *event) override;
    void paintEvent(QPaintEvent *event) override;
 
    void mousePressEvent(QMouseEvent* event) override;
    void mouseMoveEvent(QMouseEvent* event) override;
    void mouseReleaseEvent(QMouseEvent* event) override;
    void wheelEvent(QWheelEvent* event) override;
 
private:
    void recalculatePreviewDimensions();
    KisIdleTasksManager::TaskGuard registerIdleTask(KisCanvas2 *canvas) override;
    void clearCachedState() override;
    bool isPixelArt();
 
    QPointF calculatePreviewOrigin(QSize previewSize);
    QTransform canvasToPreviewTransform();
    QTransform previewToCanvasTransform();
    QPolygonF previewPolygon();
 
    qreal m_previewScale {1.0};
    QPixmap m_oldPixmap;
    QPixmap m_pixmap;
 
    QPointF m_previewOrigin; // in the same coordinates space as m_previewSize
    QSize m_previewSize {QSize(100, 100)};
 
    bool m_dragging {false};
    QPointF m_lastPos {QPointF(0, 0)};
 
    QColor m_outlineColor;
};
 
 
 
#endif /* OVERVIEWWIDGET_H */