[89] | 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 |
|
---|
| 25 | /*!
|
---|
| 26 | \brief QwtPlotZoomer provides stacked zooming for a plot widget
|
---|
| 27 |
|
---|
| 28 | QwtPlotZoomer offers rubberband selections on the plot canvas,
|
---|
| 29 | translating the selected rectangles into plot coordinates and
|
---|
| 30 | adjusting the axes to them. Zooming can repeated as often as
|
---|
| 31 | possible, limited only by maxStackDepth() or minZoomSize().
|
---|
| 32 | Each rectangle is pushed on a stack.
|
---|
| 33 |
|
---|
| 34 | Zoom rectangles can be selected depending on selectionFlags() using the
|
---|
| 35 | mouse or keyboard (QwtEventPattern, QwtPickerMachine).
|
---|
| 36 | QwtEventPattern::MouseSelect3/QwtEventPattern::KeyUndo,
|
---|
| 37 | or QwtEventPattern::MouseSelect6/QwtEventPattern::KeyRedo
|
---|
| 38 | walk up and down the zoom stack.
|
---|
| 39 | QwtEventPattern::MouseSelect2 or QwtEventPattern::KeyHome unzoom to
|
---|
| 40 | the initial size.
|
---|
| 41 |
|
---|
| 42 | QwtPlotZoomer is tailored for plots with one x and y axis, but it is
|
---|
| 43 | allowed to attach a second QwtPlotZoomer for the other axes.
|
---|
| 44 |
|
---|
| 45 | \note The realtime example includes an derived zoomer class that adds
|
---|
| 46 | scrollbars to the plot canvas.
|
---|
| 47 | */
|
---|
| 48 |
|
---|
| 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:
|
---|
| 94 | /*!
|
---|
| 95 | A signal emitting the zoomRect(), when the plot has been
|
---|
| 96 | zoomed in or out.
|
---|
| 97 |
|
---|
| 98 | \param rect Current zoom rectangle.
|
---|
| 99 | */
|
---|
| 100 |
|
---|
| 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
|
---|