Qwt Polar User's Guide  1.1.0-rc1
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qwt_polar_magnifier.h
1 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
2  * QwtPolar Widget Library
3  * Copyright (C) 2008 Uwe Rathmann
4  *
5  * This library is free software; you can redistribute it and/or
6  * modify it under the terms of the Qwt License, Version 1.0
7  *****************************************************************************/
8 
9 #ifndef QWT_POLAR_MAGNIFIER_H
10 #define QWT_POLAR_MAGNIFIER_H 1
11 
12 #include "qwt_polar_global.h"
13 #include "qwt_magnifier.h"
14 
15 class QwtPolarPlot;
16 class QwtPolarCanvas;
17 
30 class QWT_POLAR_EXPORT QwtPolarMagnifier: public QwtMagnifier
31 {
32  Q_OBJECT
33 
34 public:
35  explicit QwtPolarMagnifier( QwtPolarCanvas * );
36  virtual ~QwtPolarMagnifier();
37 
38  void setUnzoomKey( int key, int modifiers );
39  void getUnzoomKey( int &key, int &modifiers ) const;
40 
41  QwtPolarPlot *plot();
42  const QwtPolarPlot *plot() const;
43 
44  QwtPolarCanvas *canvas();
45  const QwtPolarCanvas *canvas() const;
46 
47 protected:
48  virtual void rescale( double factor );
49  void unzoom();
50 
51  virtual void widgetKeyPressEvent( QKeyEvent * );
52 
53 private:
54  class PrivateData;
55  PrivateData *d_data;
56 };
57 
58 #endif