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Diffstat (limited to 'src/libpcp_qwt/src/qwt_dial_needle.h')
-rw-r--r-- | src/libpcp_qwt/src/qwt_dial_needle.h | 190 |
1 files changed, 190 insertions, 0 deletions
diff --git a/src/libpcp_qwt/src/qwt_dial_needle.h b/src/libpcp_qwt/src/qwt_dial_needle.h new file mode 100644 index 0000000..a02a590 --- /dev/null +++ b/src/libpcp_qwt/src/qwt_dial_needle.h @@ -0,0 +1,190 @@ +/* -*- mode: C++ ; c-file-style: "stroustrup" -*- ***************************** + * Qwt Widget Library + * Copyright (C) 1997 Josef Wilgen + * Copyright (C) 2002 Uwe Rathmann + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the Qwt License, Version 1.0 + *****************************************************************************/ + +#ifndef QWT_DIAL_NEEDLE_H +#define QWT_DIAL_NEEDLE_H 1 + +#include "qwt_global.h" +#include <qpalette.h> + +class QPainter; +class QPoint; + +/*! + \brief Base class for needles that can be used in a QwtDial. + + QwtDialNeedle is a pointer that indicates a value by pointing + to a specific direction. + + Qwt is missing a set of good looking needles. + Contributions are very welcome. + + \sa QwtDial, QwtCompass +*/ + +class QWT_EXPORT QwtDialNeedle +{ +public: + QwtDialNeedle(); + virtual ~QwtDialNeedle(); + + virtual void setPalette( const QPalette & ); + const QPalette &palette() const; + + virtual void draw( QPainter *painter, const QPointF ¢er, + double length, double direction, + QPalette::ColorGroup = QPalette::Active ) const; + +protected: + /*! + \brief Draw the needle + + The origin of the needle is at position (0.0, 0.0 ) + pointing in direction 0.0 ( = east ). + + The painter is already initilaized with translation and + rotation. + + \param painter Painter + \param length Length of the needle + \param colorGroup Color group, used for painting + + \sa setPalette(), palette() + */ + virtual void drawNeedle( QPainter *painter, + double length, QPalette::ColorGroup colorGroup ) const = 0; + + virtual void drawKnob( QPainter *, double width, + const QBrush &, bool sunken ) const; + +private: + QPalette d_palette; +}; + +/*! + \brief A needle for dial widgets + + The following colors are used: + + - QPalette::Mid\n + Pointer + - QPalette::Base\n + Knob + + \sa QwtDial, QwtCompass +*/ + +class QWT_EXPORT QwtDialSimpleNeedle: public QwtDialNeedle +{ +public: + //! Style of the needle + enum Style + { + //! Arrow + Arrow, + + //! A straight line from the center + Ray + }; + + QwtDialSimpleNeedle( Style, bool hasKnob = true, + const QColor &mid = Qt::gray, const QColor &base = Qt::darkGray ); + + void setWidth( double width ); + double width() const; + +protected: + virtual void drawNeedle( QPainter *, double length, + QPalette::ColorGroup ) const; + +private: + Style d_style; + bool d_hasKnob; + double d_width; +}; + +/*! + \brief A magnet needle for compass widgets + + A magnet needle points to two opposite directions indicating + north and south. + + The following colors are used: + - QPalette::Light\n + Used for pointing south + - QPalette::Dark\n + Used for pointing north + - QPalette::Base\n + Knob (ThinStyle only) + + \sa QwtDial, QwtCompass +*/ + +class QWT_EXPORT QwtCompassMagnetNeedle: public QwtDialNeedle +{ +public: + //! Style of the needle + enum Style + { + //! A needle with a triangular shape + TriangleStyle, + + //! A thin needle + ThinStyle + }; + + QwtCompassMagnetNeedle( Style = TriangleStyle, + const QColor &light = Qt::white, const QColor &dark = Qt::red ); + +protected: + virtual void drawNeedle( QPainter *, + double length, QPalette::ColorGroup ) const; + +private: + Style d_style; +}; + +/*! + \brief An indicator for the wind direction + + QwtCompassWindArrow shows the direction where the wind comes from. + + - QPalette::Light\n + Used for Style1, or the light half of Style2 + - QPalette::Dark\n + Used for the dark half of Style2 + + \sa QwtDial, QwtCompass +*/ + +class QWT_EXPORT QwtCompassWindArrow: public QwtDialNeedle +{ +public: + //! Style of the arrow + enum Style + { + //! A needle pointing to the center + Style1, + + //! A needle pointing to the center + Style2 + }; + + QwtCompassWindArrow( Style, const QColor &light = Qt::white, + const QColor &dark = Qt::gray ); + +protected: + virtual void drawNeedle( QPainter *, + double length, QPalette::ColorGroup ) const; + +private: + Style d_style; +}; + +#endif |