QGIS API Documentation  3.13.0-Master (788156190c)
qgsmaptoolzoom.h
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1 /***************************************************************************
2  qgsmaptoolzoom.h - map tool for zooming
3  ----------------------
4  begin : January 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 QGSMAPTOOLZOOM_H
17 #define QGSMAPTOOLZOOM_H
18 
19 #include "qgsmaptool.h"
20 #include <QRect>
21 #include "qgis_gui.h"
22 
23 class QgsRubberBand;
24 
30 class GUI_EXPORT QgsMapToolZoom : public QgsMapTool
31 {
32  Q_OBJECT
33 
34  public:
36  QgsMapToolZoom( QgsMapCanvas *canvas, bool zoomOut );
37  ~QgsMapToolZoom() override;
38 
39  Flags flags() const override { return QgsMapTool::Transient; }
40  void canvasMoveEvent( QgsMapMouseEvent *e ) override;
41  void canvasPressEvent( QgsMapMouseEvent *e ) override;
42  void canvasReleaseEvent( QgsMapMouseEvent *e ) override;
43  void keyPressEvent( QKeyEvent *e ) override;
44  void keyReleaseEvent( QKeyEvent *e ) override;
45  void deactivate() override;
46 
47  protected:
49  QRect mZoomRect;
50  // minimum pixel size of diagonal of the zoom rectangle
51  int mMinPixelZoom = 20;
52 
54  bool mZoomOut;
57 
59  bool mDragging;
60 
61  QgsRubberBand *mRubberBand = nullptr;
62 
63  QCursor mZoomOutCursor;
64  QCursor mZoomInCursor;
65 
66  private:
67  void setZoomMode( bool zoomOut, bool force = false );
68 };
69 
70 #endif
QgsMapTool::keyReleaseEvent
virtual void keyReleaseEvent(QKeyEvent *e)
Key event for overriding. Default implementation does nothing.
Definition: qgsmaptool.cpp:187
QgsRubberBand
Definition: qgsrubberband.h:49
QgsMapToolZoom::mZoomInCursor
QCursor mZoomInCursor
Definition: qgsmaptoolzoom.h:64
QgsMapCanvas
Definition: qgsmapcanvas.h:78
QgsMapTool::deactivate
virtual void deactivate()
called when map tool is being deactivated
Definition: qgsmaptool.cpp:99
QgsMapTool::Transient
@ Transient
Definition: qgsmaptool.h:90
QgsMapTool::keyPressEvent
virtual void keyPressEvent(QKeyEvent *e)
Key event for overriding. Default implementation does nothing.
Definition: qgsmaptool.cpp:182
QgsMapToolZoom::mZoomRect
QRect mZoomRect
stores actual zoom rect
Definition: qgsmaptoolzoom.h:49
QgsMapToolZoom::mZoomOut
bool mZoomOut
indicates whether we're zooming in or out
Definition: qgsmaptoolzoom.h:54
QgsMapTool
Definition: qgsmaptool.h:62
QgsMapToolZoom::flags
Flags flags() const override
Returns the flags for the map tool.
Definition: qgsmaptoolzoom.h:39
QgsMapToolZoom
Definition: qgsmaptoolzoom.h:30
qgsmaptool.h
QgsMapToolZoom::mZoomOutCursor
QCursor mZoomOutCursor
Definition: qgsmaptoolzoom.h:63
QgsMapTool::canvasPressEvent
virtual void canvasPressEvent(QgsMapMouseEvent *e)
Mouse press event for overriding. Default implementation does nothing.
Definition: qgsmaptool.cpp:167
QgsMapMouseEvent
Definition: qgsmapmouseevent.h:35
QgsMapTool::canvasMoveEvent
virtual void canvasMoveEvent(QgsMapMouseEvent *e)
Mouse move event for overriding. Default implementation does nothing.
Definition: qgsmaptool.cpp:157
QgsMapTool::canvasReleaseEvent
virtual void canvasReleaseEvent(QgsMapMouseEvent *e)
Mouse release event for overriding. Default implementation does nothing.
Definition: qgsmaptool.cpp:172
QgsMapToolZoom::mNativeZoomOut
bool mNativeZoomOut
native tool
Definition: qgsmaptoolzoom.h:56
QgsMapToolZoom::mDragging
bool mDragging
Flag to indicate a map canvas drag operation is taking place.
Definition: qgsmaptoolzoom.h:59