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 | // vim: expandtab
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11 |
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12 | #ifndef QWT_DIAL_H
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13 | #define QWT_DIAL_H 1
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14 |
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15 | #include <qframe.h>
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16 | #include <qpalette.h>
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17 | #include "qwt_global.h"
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18 | #include "qwt_abstract_slider.h"
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19 | #include "qwt_round_scale_draw.h"
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20 |
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21 | class QwtDialNeedle;
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22 | class QwtDial;
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23 |
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24 | /*!
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25 | \brief A special scale draw made for QwtDial
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26 |
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27 | \sa QwtDial, QwtCompass
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28 | */
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29 | class QWT_EXPORT QwtDialScaleDraw: public QwtRoundScaleDraw
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30 | {
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31 | public:
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32 | explicit QwtDialScaleDraw(QwtDial *);
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33 | virtual QwtText label(double value) const;
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34 |
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35 | void setPenWidth(uint);
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36 | uint penWidth() const;
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37 |
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38 | private:
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39 | QwtDial *d_parent;
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40 | int d_penWidth;
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41 | };
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42 |
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43 | /*!
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44 | \brief QwtDial class provides a rounded range control.
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45 |
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46 | QwtDial is intended as base class for dial widgets like
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47 | speedometers, compass widgets, clocks ...
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48 |
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49 | \image html dials2.png
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50 |
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51 | A dial contains a scale and a needle indicating the current value
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52 | of the dial. Depending on Mode one of them is fixed and the
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53 | other is rotating. If not isReadOnly() the
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54 | dial can be rotated by dragging the mouse or using keyboard inputs
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55 | (see keyPressEvent()). A dial might be wrapping, what means
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56 | a rotation below/above one limit continues on the other limit (f.e compass).
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57 | The scale might cover any arc of the dial, its values are related to
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58 | the origin() of the dial.
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59 |
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60 | Qwt is missing a set of good looking needles (QwtDialNeedle).
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61 | Contributions are very welcome.
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62 |
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63 | \sa QwtCompass, QwtAnalogClock, QwtDialNeedle
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64 | \note The examples/dials example shows different types of dials.
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65 | */
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66 |
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67 | class QWT_EXPORT QwtDial: public QwtAbstractSlider
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68 | {
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69 | Q_OBJECT
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70 |
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71 | Q_ENUMS(Shadow)
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72 | Q_ENUMS(Mode)
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73 | Q_ENUMS(Direction)
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74 |
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75 | Q_PROPERTY(bool visibleBackground READ hasVisibleBackground WRITE showBackground)
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76 | Q_PROPERTY(int lineWidth READ lineWidth WRITE setLineWidth)
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77 | Q_PROPERTY(Shadow frameShadow READ frameShadow WRITE setFrameShadow)
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78 | Q_PROPERTY(Mode mode READ mode WRITE setMode)
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79 | Q_PROPERTY(double origin READ origin WRITE setOrigin)
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80 | Q_PROPERTY(bool wrapping READ wrapping WRITE setWrapping)
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81 | Q_PROPERTY(Direction direction READ direction WRITE setDirection)
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82 |
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83 | friend class QwtDialScaleDraw;
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84 | public:
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85 |
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86 | /*!
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87 | \brief Frame shadow
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88 |
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89 | Unfortunately it is not possible to use QFrame::Shadow
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90 | as a property of a widget that is not derived from QFrame.
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91 | The following enum is made for the designer only. It is safe
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92 | to use QFrame::Shadow instead.
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93 | */
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94 | enum Shadow
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95 | {
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96 | Plain = QFrame::Plain,
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97 | Raised = QFrame::Raised,
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98 | Sunken = QFrame::Sunken
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99 | };
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100 |
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101 | //! see QwtDial::setScaleOptions
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102 | enum ScaleOptions
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103 | {
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104 | ScaleBackbone = 1,
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105 | ScaleTicks = 2,
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106 | ScaleLabel = 4
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107 | };
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108 |
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109 | /*!
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110 | In case of RotateNeedle the needle is rotating, in case of
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111 | RotateScale, the needle points to origin()
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112 | and the scale is rotating.
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113 | */
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114 | enum Mode
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115 | {
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116 | RotateNeedle,
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117 | RotateScale
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118 | };
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119 |
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120 | /*!
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121 | Direction of the dial
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122 | */
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123 | enum Direction
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124 | {
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125 | Clockwise,
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126 | CounterClockwise
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127 | };
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128 |
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129 | explicit QwtDial( QWidget *parent = NULL);
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130 | #if QT_VERSION < 0x040000
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131 | explicit QwtDial( QWidget *parent, const char *name);
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132 | #endif
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133 |
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134 | virtual ~QwtDial();
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135 |
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136 | void setFrameShadow(Shadow);
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137 | Shadow frameShadow() const;
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138 |
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139 | bool hasVisibleBackground() const;
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140 | void showBackground(bool);
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141 |
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142 | void setLineWidth(int);
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143 | int lineWidth() const;
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144 |
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145 | void setMode(Mode);
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146 | Mode mode() const;
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147 |
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148 | virtual void setWrapping(bool);
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149 | bool wrapping() const;
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150 |
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151 | virtual void setScale(int maxMajIntv, int maxMinIntv, double step = 0.0);
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152 |
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153 | void setScaleArc(double min, double max);
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154 | void setScaleOptions(int);
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155 | void setScaleTicks(int minLen, int medLen, int majLen, int penWidth = 1);
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156 |
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157 | double minScaleArc() const;
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158 | double maxScaleArc() const;
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159 |
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160 | virtual void setOrigin(double);
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161 | double origin() const;
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162 |
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163 | void setDirection(Direction);
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164 | Direction direction() const;
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165 |
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166 | virtual void setNeedle(QwtDialNeedle *);
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167 | const QwtDialNeedle *needle() const;
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168 | QwtDialNeedle *needle();
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169 |
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170 | QRect boundingRect() const;
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171 | QRect contentsRect() const;
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172 | virtual QRect scaleContentsRect() const;
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173 |
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174 | virtual QSize sizeHint() const;
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175 | virtual QSize minimumSizeHint() const;
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176 |
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177 | virtual void setScaleDraw(QwtDialScaleDraw *);
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178 |
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179 | QwtDialScaleDraw *scaleDraw();
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180 | const QwtDialScaleDraw *scaleDraw() const;
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181 |
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182 | protected:
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183 | virtual void paintEvent(QPaintEvent *);
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184 | virtual void resizeEvent(QResizeEvent *);
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185 | virtual void keyPressEvent(QKeyEvent *);
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186 |
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187 | virtual void updateMask();
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188 |
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189 | virtual void drawFrame(QPainter *p);
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190 | virtual void drawContents(QPainter *) const;
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191 | virtual void drawFocusIndicator(QPainter *) const;
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192 |
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193 | virtual void drawScale(QPainter *, const QPoint ¢er,
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194 | int radius, double origin, double arcMin, double arcMax) const;
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195 |
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196 | /*!
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197 | Draw the contents inside the scale
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198 |
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199 | Paints nothing.
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200 |
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201 | \param painter Painter
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202 | \param center Center of the contents circle
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203 | \param radius Radius of the contents circle
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204 | */
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205 | virtual void drawScaleContents(QPainter *painter, const QPoint ¢er,
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206 | int radius) const;
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207 |
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208 | virtual void drawNeedle(QPainter *, const QPoint &,
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209 | int radius, double direction, QPalette::ColorGroup) const;
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210 |
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211 | virtual QwtText scaleLabel(double) const;
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212 | void updateScale();
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213 |
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214 | virtual void rangeChange();
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215 | virtual void valueChange();
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216 |
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217 | virtual double getValue(const QPoint &);
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218 | virtual void getScrollMode(const QPoint &,
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219 | int &scrollMode, int &direction);
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220 |
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221 | private:
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222 | void initDial();
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223 |
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224 | class PrivateData;
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225 | PrivateData *d_data;
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226 | };
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227 |
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228 | #endif
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