QGIS API Documentation  3.14.0-Pi (9f7028fd23)
qgsmapcanvasitem.h
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1 /***************************************************************************
2  qgsmapcanvasitem.h - base class for map canvas items
3  ----------------------
4  begin : February 2006
5  copyright : (C) 2006 by Martin Dobias
6  email : wonder.sk at gmail dot com
7  ***************************************************************************
8  * *
9  * This program is free software; you can redistribute it and/or modify *
10  * it under the terms of the GNU General Public License as published by *
11  * the Free Software Foundation; either version 2 of the License, or *
12  * (at your option) any later version. *
13  * *
14  ***************************************************************************/
15 
16 #ifndef QGSMAPCANVASITEM_H
17 #define QGSMAPCANVASITEM_H
18 
19 #include <QGraphicsItem>
20 #include "qgis_sip.h"
21 #include "qgsrectangle.h"
22 #include "qgis_gui.h"
23 
24 class QgsMapCanvas;
25 class QgsRenderContext;
26 class QPainter;
27 
33 class GUI_EXPORT QgsMapCanvasItem : public QGraphicsItem
34 {
35  protected:
36 
39 
40  ~QgsMapCanvasItem() override;
41 
43  virtual void paint( QPainter *painter ) = 0;
44 
45  void paint( QPainter *painter,
46  const QStyleOptionGraphicsItem *option,
47  QWidget *widget = nullptr ) override;
48 
50  void updateCanvas();
51 
58  bool setRenderContextVariables( QPainter *p, QgsRenderContext &context ) const;
59 
60  public:
61 
63  virtual void updatePosition();
64 
65  QRectF boundingRect() const override;
66 
68  QgsRectangle rect() const;
69 
71  void setRect( const QgsRectangle &r, bool resetRotation = true );
72 
74  QgsPointXY toMapCoordinates( QPoint point ) const;
75 
77  QPointF toCanvasCoordinates( const QgsPointXY &point ) const;
78 
79  protected:
80 
82  QgsMapCanvas *mMapCanvas = nullptr;
83 
95 
96  double mRectRotation;
97 
99  QSizeF mItemSize;
100 
101 };
102 
103 
104 #endif
qgsrectangle.h
QgsMapCanvas
Definition: qgsmapcanvas.h:83
QgsRenderContext
Definition: qgsrendercontext.h:57
QgsMapCanvasItem::mRect
QgsRectangle mRect
cached canvas item rectangle in map coordinates encodes position (xmin,ymax) and size (width/height) ...
Definition: qgsmapcanvasitem.h:94
QgsRectangle
Definition: qgsrectangle.h:41
QgsMapCanvasItem::mRectRotation
double mRectRotation
Definition: qgsmapcanvasitem.h:96
QgsMapCanvasItem
Definition: qgsmapcanvasitem.h:33
qgis_sip.h
QgsPointXY
Definition: qgspointxy.h:43
QgsMapCanvasItem::mItemSize
QSizeF mItemSize
cached size of the item (to return in boundingRect())
Definition: qgsmapcanvasitem.h:99
SIP_TRANSFERTHIS
#define SIP_TRANSFERTHIS
Definition: qgis_sip.h:53