Qwt User's Guide  6.1.1
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qwt_plot_zoomer.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2  * Qwt Widget Library
3  * Copyright (C) 1997 Josef Wilgen
4  * Copyright (C) 2002 Uwe Rathmann
5  *
6  * This library is free software; you can redistribute it and/or
7  * modify it under the terms of the Qwt License, Version 1.0
8  *****************************************************************************/
9 
10 #ifndef QWT_PLOT_ZOOMER_H
11 #define QWT_PLOT_ZOOMER_H
12 
13 #include "qwt_global.h"
14 #include "qwt_plot_picker.h"
15 #include <qstack.h>
16 
77 class QWT_EXPORT QwtPlotZoomer: public QwtPlotPicker
78 {
79  Q_OBJECT
80 public:
81  explicit QwtPlotZoomer( QWidget *, bool doReplot = true );
82  explicit QwtPlotZoomer( int xAxis, int yAxis,
83  QWidget *, bool doReplot = true );
84 
85  virtual ~QwtPlotZoomer();
86 
87  virtual void setZoomBase( bool doReplot = true );
88  virtual void setZoomBase( const QRectF & );
89 
90  QRectF zoomBase() const;
91  QRectF zoomRect() const;
92 
93  virtual void setAxis( int xAxis, int yAxis );
94 
95  void setMaxStackDepth( int );
96  int maxStackDepth() const;
97 
98  const QStack<QRectF> &zoomStack() const;
99  void setZoomStack( const QStack<QRectF> &,
100  int zoomRectIndex = -1 );
101 
102  uint zoomRectIndex() const;
103 
104 public Q_SLOTS:
105  void moveBy( double x, double y );
106  virtual void moveTo( const QPointF & );
107 
108  virtual void zoom( const QRectF & );
109  virtual void zoom( int up );
110 
111 Q_SIGNALS:
119  void zoomed( const QRectF &rect );
120 
121 protected:
122  virtual void rescale();
123 
124  virtual QSizeF minZoomSize() const;
125 
126  virtual void widgetMouseReleaseEvent( QMouseEvent * );
127  virtual void widgetKeyPressEvent( QKeyEvent * );
128 
129  virtual void begin();
130  virtual bool end( bool ok = true );
131  virtual bool accept( QPolygon & ) const;
132 
133 private:
134  void init( bool doReplot );
135 
136  class PrivateData;
137  PrivateData *d_data;
138 };
139 
140 #endif
virtual void widgetKeyPressEvent(QKeyEvent *)
Definition: qwt_picker.cpp:1105
virtual void setAxis(int xAxis, int yAxis)
Definition: qwt_plot_picker.cpp:162
QwtPlotPicker provides selections on a plot canvas.
Definition: qwt_plot_picker.h:27
virtual void begin()
Definition: qwt_picker.cpp:1232
virtual void widgetMouseReleaseEvent(QMouseEvent *)
Definition: qwt_picker.cpp:1048
virtual bool end(bool ok=true)
Definition: qwt_plot_picker.cpp:266
virtual bool accept(QPolygon &) const
Validate and fix up the selection.
Definition: qwt_picker.cpp:1383
QwtPlotZoomer provides stacked zooming for a plot widget.
Definition: qwt_plot_zoomer.h:77