Qwt User's Guide 5.2.3

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qwt_magnifier.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_MAGNIFIER_H
11 #define QWT_MAGNIFIER_H 1
12
13 #include "qwt_global.h"
14 #include <qobject.h>
15
16 class QWidget;
17 class QMouseEvent;
18 class QWheelEvent;
19 class QKeyEvent;
20
27 class QWT_EXPORT QwtMagnifier: public QObject
28 {
29 Q_OBJECT
30
31 public:
32 explicit QwtMagnifier(QWidget *);
33 virtual ~QwtMagnifier();
34
35 QWidget *parentWidget();
36 const QWidget *parentWidget() const;
37
38 void setEnabled(bool);
39 bool isEnabled() const;
40
41 // mouse
42 void setMouseFactor(double);
43 double mouseFactor() const;
44
45 void setMouseButton(int button, int buttonState = Qt::NoButton);
46 void getMouseButton(int &button, int &buttonState) const;
47
48 // mouse wheel
49 void setWheelFactor(double);
50 double wheelFactor() const;
51
52 void setWheelButtonState(int buttonState);
53 int wheelButtonState() const;
54
55 // keyboard
56 void setKeyFactor(double);
57 double keyFactor() const;
58
59 void setZoomInKey(int key, int modifiers);
60 void getZoomInKey(int &key, int &modifiers) const;
61
62 void setZoomOutKey(int key, int modifiers);
63 void getZoomOutKey(int &key, int &modifiers) const;
64
65 virtual bool eventFilter(QObject *, QEvent *);
66
67 protected:
72 virtual void rescale(double factor) = 0;
73
74 virtual void widgetMousePressEvent(QMouseEvent *);
75 virtual void widgetMouseReleaseEvent(QMouseEvent *);
76 virtual void widgetMouseMoveEvent(QMouseEvent *);
77 virtual void widgetWheelEvent(QWheelEvent *);
78 virtual void widgetKeyPressEvent(QKeyEvent *);
79 virtual void widgetKeyReleaseEvent(QKeyEvent *);
80
81 private:
82 class PrivateData;
83 PrivateData *d_data;
84 };
85
86 #endif