[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_DIAL_NEEDLE_H
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| 11 | #define QWT_DIAL_NEEDLE_H 1
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| 12 |
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| 13 | #include <qpalette.h>
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| 14 | #include "qwt_global.h"
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| 15 |
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| 16 | class QPainter;
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| 17 | class QPoint;
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| 18 |
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| 19 | /*!
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| 20 | \brief Base class for needles that can be used in a QwtDial.
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| 21 |
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| 22 | QwtDialNeedle is a pointer that indicates a value by pointing
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| 23 | to a specific direction.
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| 24 |
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| 25 | Qwt is missing a set of good looking needles.
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| 26 | Contributions are very welcome.
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| 27 |
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| 28 | \sa QwtDial, QwtCompass
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| 29 | */
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| 30 |
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| 31 | class QWT_EXPORT QwtDialNeedle
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| 32 | {
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| 33 | public:
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| 34 | QwtDialNeedle();
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| 35 | virtual ~QwtDialNeedle();
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| 36 |
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| 37 | /*!
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| 38 | Draw the needle
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| 39 |
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| 40 | \param painter Painter
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| 41 | \param center Center of the dial, start position for the needle
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| 42 | \param length Length of the needle
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| 43 | \param direction Direction of the needle, in degrees counter clockwise
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| 44 | \param cg Color group, used for painting
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| 45 | */
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| 46 | virtual void draw(QPainter *painter, const QPoint ¢er,
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| 47 | int length, double direction,
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| 48 | QPalette::ColorGroup cg = QPalette::Active) const = 0;
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| 49 |
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| 50 | virtual void setPalette(const QPalette &);
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| 51 | const QPalette &palette() const;
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| 52 |
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| 53 | protected:
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| 54 | static void drawKnob(QPainter *, const QPoint &pos,
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| 55 | int width, const QBrush &, bool sunken);
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| 56 |
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| 57 | private:
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| 58 | QPalette d_palette;
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| 59 | };
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| 60 |
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| 61 | /*!
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| 62 | \brief A needle for dial widgets
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| 63 |
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| 64 | The following colors are used:
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| 65 | - QColorGroup::Mid\n
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| 66 | Pointer
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| 67 | - QColorGroup::base\n
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| 68 | Knob
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| 69 |
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| 70 | \sa QwtDial, QwtCompass
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| 71 | */
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| 72 |
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| 73 | class QWT_EXPORT QwtDialSimpleNeedle: public QwtDialNeedle
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| 74 | {
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| 75 | public:
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| 76 | //! Style of the needle
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| 77 | enum Style
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| 78 | {
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| 79 | Arrow,
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| 80 | Ray
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| 81 | };
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| 82 |
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| 83 | QwtDialSimpleNeedle(Style, bool hasKnob = true,
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| 84 | const QColor &mid = Qt::gray, const QColor &base = Qt::darkGray);
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| 85 |
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| 86 | virtual void draw(QPainter *, const QPoint &, int length,
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| 87 | double direction, QPalette::ColorGroup = QPalette::Active) const;
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| 88 |
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| 89 | static void drawArrowNeedle(QPainter *,
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| 90 | const QPalette&, QPalette::ColorGroup,
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| 91 | const QPoint &, int length, int width, double direction,
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| 92 | bool hasKnob);
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| 93 |
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| 94 | static void drawRayNeedle(QPainter *,
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| 95 | const QPalette&, QPalette::ColorGroup,
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| 96 | const QPoint &, int length, int width, double direction,
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| 97 | bool hasKnob);
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| 98 |
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| 99 | void setWidth(int width);
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| 100 | int width() const;
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| 101 |
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| 102 | private:
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| 103 | Style d_style;
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| 104 | bool d_hasKnob;
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| 105 | int d_width;
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| 106 | };
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| 107 |
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| 108 | /*!
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| 109 | \brief A magnet needle for compass widgets
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| 110 |
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| 111 | A magnet needle points to two opposite directions indicating
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| 112 | north and south.
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| 113 |
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| 114 | The following colors are used:
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| 115 | - QColorGroup::Light\n
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| 116 | Used for pointing south
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| 117 | - QColorGroup::Dark\n
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| 118 | Used for pointing north
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| 119 | - QColorGroup::Base\n
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| 120 | Knob (ThinStyle only)
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| 121 |
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| 122 | \sa QwtDial, QwtCompass
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| 123 | */
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| 124 |
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| 125 | class QWT_EXPORT QwtCompassMagnetNeedle: public QwtDialNeedle
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| 126 | {
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| 127 | public:
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| 128 | //! Style of the needle
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| 129 | enum Style
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| 130 | {
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| 131 | TriangleStyle,
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| 132 | ThinStyle
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| 133 | };
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| 134 | QwtCompassMagnetNeedle(Style = TriangleStyle,
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| 135 | const QColor &light = Qt::white, const QColor &dark = Qt::red);
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| 136 |
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| 137 | virtual void draw(QPainter *, const QPoint &, int length,
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| 138 | double direction, QPalette::ColorGroup = QPalette::Active) const;
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| 139 |
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| 140 | static void drawTriangleNeedle(QPainter *,
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| 141 | const QPalette &, QPalette::ColorGroup,
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| 142 | const QPoint &, int length, double direction);
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| 143 |
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| 144 | static void drawThinNeedle(QPainter *,
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| 145 | const QPalette &, QPalette::ColorGroup,
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| 146 | const QPoint &, int length, double direction);
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| 147 |
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| 148 | protected:
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| 149 | static void drawPointer(QPainter *painter, const QBrush &brush,
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| 150 | int colorOffset, const QPoint ¢er,
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| 151 | int length, int width, double direction);
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| 152 |
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| 153 | private:
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| 154 | Style d_style;
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| 155 | };
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| 156 |
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| 157 | /*!
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| 158 | \brief An indicator for the wind direction
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| 159 |
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| 160 | QwtCompassWindArrow shows the direction where the wind comes from.
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| 161 |
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| 162 | - QColorGroup::Light\n
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| 163 | Used for Style1, or the light half of Style2
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| 164 | - QColorGroup::Dark\n
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| 165 | Used for the dark half of Style2
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| 166 |
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| 167 | \sa QwtDial, QwtCompass
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| 168 | */
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| 169 |
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| 170 | class QWT_EXPORT QwtCompassWindArrow: public QwtDialNeedle
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| 171 | {
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| 172 | public:
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| 173 | //! Style of the arrow
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| 174 | enum Style
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| 175 | {
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| 176 | Style1,
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| 177 | Style2
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| 178 | };
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| 179 |
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| 180 | QwtCompassWindArrow(Style, const QColor &light = Qt::white,
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| 181 | const QColor &dark = Qt::gray);
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| 182 |
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| 183 | virtual void draw(QPainter *, const QPoint &, int length,
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| 184 | double direction, QPalette::ColorGroup = QPalette::Active) const;
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| 185 |
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| 186 | static void drawStyle1Needle(QPainter *,
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| 187 | const QPalette &, QPalette::ColorGroup,
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| 188 | const QPoint &, int length, double direction);
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| 189 |
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| 190 | static void drawStyle2Needle(QPainter *,
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| 191 | const QPalette &, QPalette::ColorGroup,
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| 192 | const QPoint &, int length, double direction);
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| 193 |
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| 194 | private:
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| 195 | Style d_style;
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| 196 | };
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| 197 |
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| 198 | #endif // QWT_DIAL_NEEDLE_H
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