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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