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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 "qgsrectangle.h"
21 
22 class QgsMapCanvas;
23 class QgsRenderContext;
24 class QPainter;
25 
30 class GUI_EXPORT QgsMapCanvasItem : public QGraphicsItem
31 {
32  protected:
33 
35  QgsMapCanvasItem( QgsMapCanvas* mapCanvas );
36 
37  virtual ~QgsMapCanvasItem();
38 
40  virtual void paint( QPainter * painter ) = 0;
41 
43  virtual void paint( QPainter * painter,
44  const QStyleOptionGraphicsItem * option,
45  QWidget * widget = 0 );
46 
48  void updateCanvas();
49 
55  bool setRenderContextVariables( QPainter* p, QgsRenderContext& context ) const;
56 
57  public:
58 
60  virtual void updatePosition();
61 
63  virtual QRectF boundingRect() const;
64 
67  Q_DECL_DEPRECATED void setPanningOffset( const QPoint& point );
68 
70  QgsRectangle rect() const;
71 
73  void setRect( const QgsRectangle& r );
74 
76  QgsPoint toMapCoordinates( const QPoint& point );
77 
79  QPointF toCanvasCoordinates( const QgsPoint& point );
80 
81  protected:
82 
85 
88 
92 
94  QSizeF mItemSize;
95 };
96 
97 
98 #endif
A rectangle specified with double values.
Definition: qgsrectangle.h:35
An abstract class for items that can be placed on the map canvas.
Definition: qgsmapcanvasitem.h:30
QPoint mPanningOffset
offset from normal position due current panning operation, used when converting map coordinates to mo...
Definition: qgsmapcanvasitem.h:91
Map canvas is a class for displaying all GIS data types on a canvas.
Definition: qgsmapcanvas.h:104
QSizeF mItemSize
cached size of the item (to return in boundingRect())
Definition: qgsmapcanvasitem.h:94
QgsRectangle mRect
canvas item rectangle (in map coordinates)
Definition: qgsmapcanvasitem.h:87
A class to represent a point geometry.
Definition: qgspoint.h:63
Contains information about the context of a rendering operation.
Definition: qgsrendercontext.h:39
QgsMapCanvas * mMapCanvas
pointer to map canvas
Definition: qgsmapcanvasitem.h:84