qgsmapoverviewcanvas.h

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/***************************************************************************
                           qgsmapoverviewcanvas.h
                      Map canvas subclassed for overview
                              -------------------
    begin                : 09/14/2005
    copyright            : (C) 2005 by Martin Dobias
    email                : won.der at centrum.sk
 ***************************************************************************/
 
/***************************************************************************
 *                                                                         *
 *   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 QGSMAPOVERVIEWCANVAS_H
#define QGSMAPOVERVIEWCANVAS_H
 
#include <QPixmap>
#include <QWidget>
 
class QMouseEvent;
class QgsMapCanvas;
class QgsPanningWidget; // defined in .cpp
class QgsRectangle;
 
class QgsMapRendererQImageJob;
#include "qgsmapsettings.h"
#include "qgis_gui.h"

class GUI_EXPORT QgsMapOverviewCanvas : public QWidget
{
    Q_OBJECT
 
  public:
    QgsMapOverviewCanvas( QWidget *parent SIP_TRANSFERTHIS = nullptr, QgsMapCanvas *mapCanvas = nullptr );

    void refresh();

    void setBackgroundColor( const QColor &color );

    void setLayers( const QList<QgsMapLayer *> &layers );

    QList<QgsMapLayer *> layers() const;
 
    void enableAntiAliasing( bool flag )
    {
      mSettings.setFlag( Qgis::MapSettingsFlag::Antialiasing, flag );
      mSettings.setFlag( Qgis::MapSettingsFlag::HighQualityImageTransforms, flag );
    }
 
    void updateFullExtent();
 
  protected slots:
    void mapRenderingFinished();

    void layerRepaintRequested( bool deferred = false );
 
  protected:
    void drawExtentRect();

    void destinationCrsChanged();

    void transformContextChanged();

    void paintEvent( QPaintEvent *pe ) override;

    void showEvent( QShowEvent *e ) override;

    void resizeEvent( QResizeEvent *e ) override;

    void mouseMoveEvent( QMouseEvent *e ) override;

    void mousePressEvent( QMouseEvent *e ) override;

    void mouseReleaseEvent( QMouseEvent *e ) override;

    void wheelEvent( QWheelEvent *e ) override;

    void updatePanningWidget( QPoint pos );

    QgsPanningWidget *mPanningWidget = nullptr;

    QPoint mPanningCursorOffset;

    QgsMapCanvas *mMapCanvas = nullptr;

    QPixmap mPixmap;

    QgsMapSettings mSettings;

    QgsMapRendererQImageJob *mJob = nullptr;
};
 
 
#ifndef SIP_RUN

// Widget that serves as rectangle showing current extent in overview
class QgsPanningWidget : public QWidget
{
    Q_OBJECT
 
    QPolygon mPoly;
 
  public:
    explicit QgsPanningWidget( QWidget *parent );
 
    void setPolygon( const QPolygon &p );
 
    void paintEvent( QPaintEvent *pe ) override;
};
 
#endif
 
#endif