[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_CANVAS_H
|
---|
| 13 | #define QWT_PLOT_CANVAS_H
|
---|
| 14 |
|
---|
| 15 | #include <qframe.h>
|
---|
| 16 | #include <qpen.h>
|
---|
| 17 | #include "qwt_global.h"
|
---|
| 18 |
|
---|
| 19 | class QwtPlot;
|
---|
| 20 | class QPixmap;
|
---|
| 21 |
|
---|
| 22 | /*!
|
---|
| 23 | \brief Canvas of a QwtPlot.
|
---|
| 24 | \sa QwtPlot
|
---|
| 25 | */
|
---|
| 26 | class QWT_EXPORT QwtPlotCanvas : public QFrame
|
---|
| 27 | {
|
---|
| 28 | Q_OBJECT
|
---|
| 29 |
|
---|
| 30 | public:
|
---|
| 31 |
|
---|
| 32 | /*!
|
---|
| 33 | \brief Paint attributes
|
---|
| 34 |
|
---|
| 35 | - PaintCached\n
|
---|
| 36 | Paint double buffered and reuse the content of the pixmap buffer
|
---|
| 37 | for some spontaneous repaints that happen when a plot gets unhidden,
|
---|
| 38 | deiconified or changes the focus.
|
---|
| 39 | Disabling the cache will improve the performance for
|
---|
| 40 | incremental paints (using QwtPlotCurve::draw).
|
---|
| 41 |
|
---|
| 42 | - PaintPacked\n
|
---|
| 43 | Suppress system background repaints and paint it together with
|
---|
| 44 | the canvas contents.
|
---|
| 45 | Painting packed might avoid flickering for expensive repaints,
|
---|
| 46 | when there is a notable gap between painting the background
|
---|
| 47 | and the plot contents.
|
---|
| 48 |
|
---|
| 49 | The default setting enables PaintCached and PaintPacked
|
---|
| 50 |
|
---|
| 51 | \sa setPaintAttribute(), testPaintAttribute(), paintCache()
|
---|
| 52 | */
|
---|
| 53 | enum PaintAttribute
|
---|
| 54 | {
|
---|
| 55 | PaintCached = 1,
|
---|
| 56 | PaintPacked = 2
|
---|
| 57 | };
|
---|
| 58 |
|
---|
| 59 | /*!
|
---|
| 60 | \brief Focus indicator
|
---|
| 61 |
|
---|
| 62 | - NoFocusIndicator\n
|
---|
| 63 | Don't paint a focus indicator
|
---|
| 64 |
|
---|
| 65 | - CanvasFocusIndicator\n
|
---|
| 66 | The focus is related to the complete canvas.
|
---|
| 67 | Paint the focus indicator using paintFocus()
|
---|
| 68 |
|
---|
| 69 | - ItemFocusIndicator\n
|
---|
| 70 | The focus is related to an item (curve, point, ...) on
|
---|
| 71 | the canvas. It is up to the application to display a
|
---|
| 72 | focus indication using f.e. highlighting.
|
---|
| 73 |
|
---|
| 74 | \sa setFocusIndicator(), focusIndicator(), paintFocus()
|
---|
| 75 | */
|
---|
| 76 |
|
---|
| 77 | enum FocusIndicator
|
---|
| 78 | {
|
---|
| 79 | NoFocusIndicator,
|
---|
| 80 | CanvasFocusIndicator,
|
---|
| 81 | ItemFocusIndicator
|
---|
| 82 | };
|
---|
| 83 |
|
---|
| 84 | explicit QwtPlotCanvas(QwtPlot *);
|
---|
| 85 | virtual ~QwtPlotCanvas();
|
---|
| 86 |
|
---|
| 87 | QwtPlot *plot();
|
---|
| 88 | const QwtPlot *plot() const;
|
---|
| 89 |
|
---|
| 90 | void setFocusIndicator(FocusIndicator);
|
---|
| 91 | FocusIndicator focusIndicator() const;
|
---|
| 92 |
|
---|
| 93 | void setPaintAttribute(PaintAttribute, bool on = true);
|
---|
| 94 | bool testPaintAttribute(PaintAttribute) const;
|
---|
| 95 |
|
---|
| 96 | QPixmap *paintCache();
|
---|
| 97 | const QPixmap *paintCache() const;
|
---|
| 98 | void invalidatePaintCache();
|
---|
| 99 |
|
---|
| 100 | void replot();
|
---|
| 101 |
|
---|
| 102 | protected:
|
---|
| 103 | virtual void hideEvent(QHideEvent *);
|
---|
| 104 |
|
---|
| 105 | virtual void paintEvent(QPaintEvent *);
|
---|
| 106 |
|
---|
| 107 | virtual void drawContents(QPainter *);
|
---|
| 108 | virtual void drawFocusIndicator(QPainter *);
|
---|
| 109 |
|
---|
| 110 | void drawCanvas(QPainter *painter = NULL);
|
---|
| 111 |
|
---|
| 112 | private:
|
---|
| 113 | void setSystemBackground(bool);
|
---|
| 114 |
|
---|
| 115 | class PrivateData;
|
---|
| 116 | PrivateData *d_data;
|
---|
| 117 | };
|
---|
| 118 |
|
---|
| 119 | #endif
|
---|