Qwt User's Guide 5.2.3

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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 // vim: expandtab
11
12 #ifndef QWT_PLOT_ZOOMER_H
13 #define QWT_PLOT_ZOOMER_H
14
15 #include <qglobal.h>
16 #if QT_VERSION < 0x040000
17 #include <qvaluestack.h>
18 #else
19 #include <qstack.h>
20 #endif
21
22 #include "qwt_double_rect.h"
23 #include "qwt_plot_picker.h"
24
49 class QWT_EXPORT QwtPlotZoomer: public QwtPlotPicker
50 {
51 Q_OBJECT
52 public:
53 explicit QwtPlotZoomer(QwtPlotCanvas *, bool doReplot = true);
54 explicit QwtPlotZoomer(int xAxis, int yAxis,
55 QwtPlotCanvas *, bool doReplot = true);
56 explicit QwtPlotZoomer(int xAxis, int yAxis, int selectionFlags,
57 DisplayMode trackerMode, QwtPlotCanvas *,
58 bool doReplot = true);
59
60 virtual ~QwtPlotZoomer();
61
62 virtual void setZoomBase(bool doReplot = true);
63 virtual void setZoomBase(const QwtDoubleRect &);
64
65 QwtDoubleRect zoomBase() const;
66 QwtDoubleRect zoomRect() const;
67
68 virtual void setAxis(int xAxis, int yAxis);
69
70 void setMaxStackDepth(int);
71 int maxStackDepth() const;
72
73 #if QT_VERSION < 0x040000
74 const QValueStack<QwtDoubleRect> &zoomStack() const;
75 void setZoomStack(const QValueStack<QwtDoubleRect> &,
76 int zoomRectIndex = -1);
77 #else
78 const QStack<QwtDoubleRect> &zoomStack() const;
79 void setZoomStack(const QStack<QwtDoubleRect> &,
80 int zoomRectIndex = -1);
81 #endif
82 uint zoomRectIndex() const;
83
84 virtual void setSelectionFlags(int);
85
86 public slots:
87 void moveBy(double x, double y);
88 virtual void move(double x, double y);
89
90 virtual void zoom(const QwtDoubleRect &);
91 virtual void zoom(int up);
92
93 signals:
101 void zoomed(const QwtDoubleRect &rect);
102
103 protected:
104 virtual void rescale();
105
106 virtual QwtDoubleSize minZoomSize() const;
107
108 virtual void widgetMouseReleaseEvent(QMouseEvent *);
109 virtual void widgetKeyPressEvent(QKeyEvent *);
110
111 virtual void begin();
112 virtual bool end(bool ok = true);
113 virtual bool accept(QwtPolygon &) const;
114
115 private:
116 void init(int selectionFlags, DisplayMode trackerMode, bool doReplot);
117
118 class PrivateData;
119 PrivateData *d_data;
120 };
121
122 #endif