[89] | 1 | /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
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| 2 | * Qwt Widget Library
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| 3 | * Copyright (C) 1997 Josef Wilgen
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| 4 | * Copyright (C) 2002 Uwe Rathmann
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| 5 | *
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| 6 | * This library is free software; you can redistribute it and/or
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| 7 | * modify it under the terms of the Qwt License, Version 1.0
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| 8 | *****************************************************************************/
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| 9 |
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| 10 | #ifndef QWT_PAINTER_H
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| 11 | #define QWT_PAINTER_H
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| 12 |
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| 13 | #include <qpoint.h>
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| 14 | #include <qrect.h>
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| 15 | #include <qpen.h>
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| 16 | #include "qwt_global.h"
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| 17 | #include "qwt_layout_metrics.h"
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| 18 | #include "qwt_polygon.h"
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| 19 |
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| 20 | class QPainter;
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| 21 | class QBrush;
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| 22 | class QColor;
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| 23 | class QWidget;
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| 24 | class QwtScaleMap;
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| 25 | class QwtColorMap;
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| 26 | class QwtDoubleInterval;
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| 27 |
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| 28 | #if QT_VERSION < 0x040000
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| 29 | class QColorGroup;
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| 30 | class QSimpleRichText;
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| 31 | #else
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| 32 | class QPalette;
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| 33 | class QTextDocument;
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| 34 | #endif
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| 35 |
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| 36 | #if defined(Q_WS_X11)
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| 37 | // Warning: QCOORD_MIN, QCOORD_MAX are wrong on X11.
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| 38 | #define QWT_COORD_MAX 16384
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| 39 | #define QWT_COORD_MIN (-QWT_COORD_MAX - 1)
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| 40 | #else
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| 41 | #define QWT_COORD_MAX 2147483647
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| 42 | #define QWT_COORD_MIN -QWT_COORD_MAX - 1
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| 43 | #endif
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| 44 |
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| 45 | /*!
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| 46 | \brief A collection of QPainter workarounds
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| 47 |
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| 48 | 1) Clipping to coordinate system limits (Qt3 only)
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| 49 |
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| 50 | On X11 pixel coordinates are stored in shorts. Qt
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| 51 | produces overruns when mapping QCOORDS to shorts.
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| 52 |
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| 53 | 2) Scaling to device metrics
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| 54 |
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| 55 | QPainter scales fonts, line and fill patterns to the metrics
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| 56 | of the paint device. Other values like the geometries of rects, points
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| 57 | remain device independend. To enable a device independent widget
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| 58 | implementation, QwtPainter adds scaling of these geometries.
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| 59 | (Unfortunately QPainter::scale scales both types of paintings,
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| 60 | so the objects of the first type would be scaled twice).
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| 61 | */
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| 62 |
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| 63 | class QWT_EXPORT QwtPainter
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| 64 | {
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| 65 | public:
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| 66 | static void setMetricsMap(const QPaintDevice *layout,
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| 67 | const QPaintDevice *device);
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| 68 | static void setMetricsMap(const QwtMetricsMap &);
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| 69 | static void resetMetricsMap();
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| 70 | static const QwtMetricsMap &metricsMap();
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| 71 |
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| 72 | static void setDeviceClipping(bool);
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| 73 | static bool deviceClipping();
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| 74 | static const QRect &deviceClipRect();
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| 75 |
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| 76 | static void setClipRect(QPainter *, const QRect &);
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| 77 |
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| 78 | static void drawText(QPainter *, int x, int y,
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| 79 | const QString &);
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| 80 | static void drawText(QPainter *, const QPoint &,
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| 81 | const QString &);
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| 82 | static void drawText(QPainter *, int x, int y, int w, int h,
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| 83 | int flags, const QString &);
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| 84 | static void drawText(QPainter *, const QRect &,
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| 85 | int flags, const QString &);
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| 86 |
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| 87 | #ifndef QT_NO_RICHTEXT
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| 88 | #if QT_VERSION < 0x040000
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| 89 | static void drawSimpleRichText(QPainter *, const QRect &,
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| 90 | int flags, QSimpleRichText &);
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| 91 | #else
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| 92 | static void drawSimpleRichText(QPainter *, const QRect &,
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| 93 | int flags, QTextDocument &);
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| 94 | #endif
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| 95 | #endif
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| 96 |
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| 97 | static void drawRect(QPainter *, int x, int y, int w, int h);
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| 98 | static void drawRect(QPainter *, const QRect &rect);
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| 99 | static void fillRect(QPainter *, const QRect &, const QBrush &);
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| 100 |
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| 101 | static void drawEllipse(QPainter *, const QRect &);
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| 102 | static void drawPie(QPainter *, const QRect & r, int a, int alen);
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| 103 |
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| 104 | static void drawLine(QPainter *, int x1, int y1, int x2, int y2);
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| 105 | static void drawLine(QPainter *, const QPoint &p1, const QPoint &p2);
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| 106 | static void drawPolygon(QPainter *, const QwtPolygon &pa);
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| 107 | static void drawPolyline(QPainter *, const QwtPolygon &pa);
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| 108 | static void drawPoint(QPainter *, int x, int y);
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| 109 |
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| 110 | #if QT_VERSION < 0x040000
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| 111 | static void drawRoundFrame(QPainter *, const QRect &,
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| 112 | int width, const QColorGroup &cg, bool sunken);
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| 113 | #else
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| 114 | static void drawRoundFrame(QPainter *, const QRect &,
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| 115 | int width, const QPalette &, bool sunken);
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| 116 | #endif
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| 117 | static void drawFocusRect(QPainter *, QWidget *);
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| 118 | static void drawFocusRect(QPainter *, QWidget *, const QRect &);
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| 119 |
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| 120 | static void drawColorBar(QPainter *painter,
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| 121 | const QwtColorMap &, const QwtDoubleInterval &,
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| 122 | const QwtScaleMap &, Qt::Orientation, const QRect &);
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| 123 |
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| 124 | #if QT_VERSION < 0x040000
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| 125 | static void setSVGMode(bool on);
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| 126 | static bool isSVGMode();
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| 127 | #endif
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| 128 |
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| 129 | static QPen scaledPen(const QPen &);
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| 130 |
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| 131 | private:
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| 132 | static void drawColoredArc(QPainter *, const QRect &,
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| 133 | int peak, int arc, int intervall, const QColor &c1, const QColor &c2);
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| 134 |
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| 135 | static bool d_deviceClipping;
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| 136 | static QwtMetricsMap d_metricsMap;
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| 137 | #if QT_VERSION < 0x040000
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| 138 | static bool d_SVGMode;
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| 139 | #endif
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| 140 | };
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| 141 |
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| 142 | //! Wrapper for QPainter::drawLine()
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| 143 | inline void QwtPainter::drawLine(QPainter *painter,
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| 144 | const QPoint &p1, const QPoint &p2)
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| 145 | {
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| 146 | drawLine(painter, p1.x(), p1.y(), p2.x(), p2.y());
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| 147 | }
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| 148 |
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| 149 | /*!
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| 150 | Returns whether device clipping is enabled. On X11 the default
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| 151 | is enabled, otherwise it is disabled.
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| 152 | \sa QwtPainter::setDeviceClipping()
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| 153 | */
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| 154 | inline bool QwtPainter::deviceClipping()
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| 155 | {
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| 156 | return d_deviceClipping;
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| 157 | }
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| 158 |
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| 159 | #endif
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