QGIS API Documentation  3.0.2-Girona (307d082)
qgsmapoverviewcanvas.h
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1 /***************************************************************************
2  qgsmapoverviewcanvas.h
3  Map canvas subclassed for overview
4  -------------------
5  begin : 09/14/2005
6  copyright : (C) 2005 by Martin Dobias
7  email : won.der at centrum.sk
8  ***************************************************************************/
9 
10 /***************************************************************************
11  * *
12  * This program is free software; you can redistribute it and/or modify *
13  * it under the terms of the GNU General Public License as published by *
14  * the Free Software Foundation; either version 2 of the License, or *
15  * (at your option) any later version. *
16  * *
17  ***************************************************************************/
18 
19 #ifndef QGSMAPOVERVIEWCANVAS_H
20 #define QGSMAPOVERVIEWCANVAS_H
21 
22 
23 #include <QMouseEvent>
24 #include <QWheelEvent>
25 #include <QWidget>
26 #include <QStringList>
27 #include <QPixmap>
28 
29 class QgsMapCanvas;
30 class QgsPanningWidget; // defined in .cpp
31 class QgsRectangle;
32 
34 #include "qgsmapsettings.h"
35 #include "qgis_gui.h"
36 
41 class GUI_EXPORT QgsMapOverviewCanvas : public QWidget
42 {
43  Q_OBJECT
44 
45  public:
46  QgsMapOverviewCanvas( QWidget *parent SIP_TRANSFERTHIS = nullptr, QgsMapCanvas *mapCanvas = nullptr );
47 
49  void refresh();
50 
52  void setBackgroundColor( const QColor &color );
53 
55  void setLayers( const QList<QgsMapLayer *> &layers );
56 
58  QList<QgsMapLayer *> layers() const;
59 
60  void enableAntiAliasing( bool flag ) { mSettings.setFlag( QgsMapSettings::Antialiasing, flag ); }
61 
62  void updateFullExtent();
63 
64  protected slots:
65  void mapRenderingFinished();
66 
70  void layerRepaintRequested( bool deferred = false );
71 
72  protected:
73 
75  void drawExtentRect();
76 
78  void destinationCrsChanged();
79 
81  void transformContextChanged();
82 
84  void paintEvent( QPaintEvent *pe ) override;
85 
87  void showEvent( QShowEvent *e ) override;
88 
90  void resizeEvent( QResizeEvent *e ) override;
91 
93  void mouseMoveEvent( QMouseEvent *e ) override;
94 
96  void mousePressEvent( QMouseEvent *e ) override;
97 
99  void mouseReleaseEvent( QMouseEvent *e ) override;
100 
102  void updatePanningWidget( QPoint pos );
103 
105  QgsPanningWidget *mPanningWidget = nullptr;
106 
109 
111  QgsMapCanvas *mMapCanvas = nullptr;
112 
114  QPixmap mPixmap;
115 
118 
120  QgsMapRendererQImageJob *mJob = nullptr;
121 };
122 
123 
124 #ifndef SIP_RUN
125 
127 // Widget that serves as rectangle showing current extent in overview
128 class QgsPanningWidget : public QWidget
129 {
130  Q_OBJECT
131 
132  QPolygon mPoly;
133 
134  public:
135  explicit QgsPanningWidget( QWidget *parent );
136 
137  void setPolygon( const QPolygon &p );
138 
139  void paintEvent( QPaintEvent *pe ) override;
140 
141 };
143 
144 #endif
145 
146 #endif
QPoint mPanningCursorOffset
position of cursor inside panning widget
A rectangle specified with double values.
Definition: qgsrectangle.h:39
#define SIP_TRANSFERTHIS
Definition: qgis_sip.h:46
A widget that displays an overview map.
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:74
The QgsMapSettings class contains configuration for rendering of the map.
void enableAntiAliasing(bool flag)
QgsMapSettings mSettings
map settings used for rendering of the overview map
Enable anti-aliasing for map rendering.
QPixmap mPixmap
pixmap where the map is stored
Intermediate base class adding functionality that allows client to query the rendered image...