File indexing completed on 2024-06-23 04:26:28

 /*
  *  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 <QPointer>
 
 #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;
     ///
     /// \brief isPixelArt checks if the preview is bigger than the image itself
     ///
     /// We assume that if the preview is bigger than the image itself,
     /// (1) the image is very small,
     ///     (might not be true if the docker is huge and the user is on 4k display...)
     /// (2) the image is pixel art, so they would like to see pixels.
     /// In that case we'd like to use a different algorithm (Nearest Neighbour, called "Box")
     ///    in the OverviewThumbnailStrokeStrategy.
     /// \return
     ///
     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 */