qgsplotcanvas.h

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/***************************************************************************
                          qgsplotcanvas.h
                          ---------------
    begin                : March 2022
    copyright            : (C) 2022 by Nyall Dawson
    email                : nyall dot dawson at gmail dot com
***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 ***************************************************************************/
 
#ifndef QGSPLOTCANVAS_H
#define QGSPLOTCANVAS_H
 
#include "qgsconfig.h"
 
#include "qgis_gui.h"
#include "qgis_sip.h"
 
#include <QGraphicsView>
#include <QPointer>
 
class QgsPlotMouseEvent;
class QgsPlotTool;
class QgsCoordinateReferenceSystem;
class QgsPoint;
class QgsPointXY;
class QgsPlotToolTemporaryKeyPan;
class QgsPlotToolTemporaryMousePan;
class QgsPlotToolTemporaryKeyZoom;
 
class QMenu;
 
 
#ifdef SIP_RUN
//%ModuleHeaderCode
#include "qgsplotcanvas.h"
#include "qgselevationprofilecanvas.h"
//%End
#endif

class GUI_EXPORT QgsPlotCanvas : public QGraphicsView
{
#ifdef SIP_RUN
    SIP_CONVERT_TO_SUBCLASS_CODE
    if ( qobject_cast<QgsElevationProfileCanvas *>( sipCpp ) != nullptr )
      sipType = sipType_QgsElevationProfileCanvas;
    else if ( qobject_cast<QgsPlotCanvas *>( sipCpp ) != nullptr )
      sipType = sipType_QgsPlotCanvas;
    else
      sipType = nullptr;
    SIP_END
#endif
 
    Q_OBJECT
 
  public:
    QgsPlotCanvas( QWidget *parent SIP_TRANSFERTHIS = nullptr );
 
    ~QgsPlotCanvas() override;

    virtual void cancelJobs() SIP_SKIP;

    void setTool( QgsPlotTool *tool );

    void unsetTool( QgsPlotTool *tool );

    QgsPlotTool *tool();

    virtual QgsCoordinateReferenceSystem crs() const;

    virtual QgsPoint toMapCoordinates( const QgsPointXY &point ) const;

    virtual QgsPointXY toCanvasCoordinates( const QgsPoint &point ) const;

    virtual void panContentsBy( double dx, double dy );

    virtual void centerPlotOn( double x, double y );

    virtual void scalePlot( double factor );

    virtual void zoomToRect( const QRectF &rect );

    virtual QgsPointXY snapToPlot( QPoint point );
 
  public slots:

    virtual void refresh();
 
  signals:

    void toolChanged( QgsPlotTool *newTool );

    void plotAreaChanged();

    void contextMenuAboutToShow( QMenu *menu, QgsPlotMouseEvent *event );

    void willBeDeleted();
 
  protected:
    bool event( QEvent *e ) override;
    void keyPressEvent( QKeyEvent *e ) override;
    void keyReleaseEvent( QKeyEvent *e ) override;
    void mouseDoubleClickEvent( QMouseEvent *e ) override;
    void mouseMoveEvent( QMouseEvent *e ) override;
    void mousePressEvent( QMouseEvent *e ) override;
    void mouseReleaseEvent( QMouseEvent *e ) override;
    void wheelEvent( QWheelEvent *e ) override;
    void resizeEvent( QResizeEvent *e ) override;
    bool viewportEvent( QEvent *event ) override;

    virtual void wheelZoom( QWheelEvent *event );
 
  private:
    QGraphicsScene *mScene = nullptr;

    QPointer<QgsPlotTool> mTool;
 
    QgsPlotToolTemporaryKeyPan *mSpacePanTool = nullptr;
    QgsPlotToolTemporaryMousePan *mMidMouseButtonPanTool = nullptr;
    QgsPlotToolTemporaryKeyZoom *mSpaceZoomTool = nullptr;
 
    void showContextMenu( QgsPlotMouseEvent *event );
};
 
#endif // QGSPLOTCANVAS_H