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Diffstat (limited to 'src/libpcp_qwt/src/qwt_abstract_scale_draw.h')
-rw-r--r-- | src/libpcp_qwt/src/qwt_abstract_scale_draw.h | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/libpcp_qwt/src/qwt_abstract_scale_draw.h b/src/libpcp_qwt/src/qwt_abstract_scale_draw.h new file mode 100644 index 0000000..1dd64c0 --- /dev/null +++ b/src/libpcp_qwt/src/qwt_abstract_scale_draw.h @@ -0,0 +1,139 @@ +/* -*- 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_ABSTRACT_SCALE_DRAW_H +#define QWT_ABSTRACT_SCALE_DRAW_H + +#include "qwt_global.h" +#include "qwt_scale_div.h" +#include "qwt_text.h" + +class QPalette; +class QPainter; +class QFont; +class QwtScaleTransformation; +class QwtScaleMap; + +/*! + \brief A abstract base class for drawing scales + + QwtAbstractScaleDraw can be used to draw linear or logarithmic scales. + + After a scale division has been specified as a QwtScaleDiv object + using QwtAbstractScaleDraw::setScaleDiv(const QwtScaleDiv &s), + the scale can be drawn with the QwtAbstractScaleDraw::draw() member. +*/ +class QWT_EXPORT QwtAbstractScaleDraw +{ +public: + + /*! + Components of a scale + \sa enableComponent(), hasComponent + */ + enum ScaleComponent + { + //! Backbone = the line where the ticks are located + Backbone = 0x01, + + //! Ticks + Ticks = 0x02, + + //! Labels + Labels = 0x04 + }; + + //! Scale components + typedef QFlags<ScaleComponent> ScaleComponents; + + QwtAbstractScaleDraw(); + virtual ~QwtAbstractScaleDraw(); + + void setScaleDiv( const QwtScaleDiv &s ); + const QwtScaleDiv& scaleDiv() const; + + void setTransformation( QwtScaleTransformation * ); + const QwtScaleMap &scaleMap() const; + QwtScaleMap &scaleMap(); + + void enableComponent( ScaleComponent, bool enable = true ); + bool hasComponent( ScaleComponent ) const; + + void setTickLength( QwtScaleDiv::TickType, double length ); + double tickLength( QwtScaleDiv::TickType ) const; + double maxTickLength() const; + + void setSpacing( double margin ); + double spacing() const; + + void setPenWidth( int width ); + int penWidth() const; + + virtual void draw( QPainter *, const QPalette & ) const; + + virtual QwtText label( double ) const; + + /*! + Calculate the extent + + The extent is the distcance from the baseline to the outermost + pixel of the scale draw in opposite to its orientation. + It is at least minimumExtent() pixels. + + \sa setMinimumExtent(), minimumExtent() + */ + virtual double extent( const QFont & ) const = 0; + + void setMinimumExtent( double ); + double minimumExtent() const; + +protected: + /*! + Draw a tick + + \param painter Painter + \param value Value of the tick + \param len Lenght of the tick + + \sa drawBackbone(), drawLabel() + */ + virtual void drawTick( QPainter *painter, double value, double len ) const = 0; + + /*! + Draws the baseline of the scale + \param painter Painter + + \sa drawTick(), drawLabel() + */ + virtual void drawBackbone( QPainter *painter ) const = 0; + + /*! + Draws the label for a major scale tick + + \param painter Painter + \param value Value + + \sa drawTick(), drawBackbone() + */ + virtual void drawLabel( QPainter *painter, double value ) const = 0; + + void invalidateCache(); + const QwtText &tickLabel( const QFont &, double value ) const; + +private: + QwtAbstractScaleDraw( const QwtAbstractScaleDraw & ); + QwtAbstractScaleDraw &operator=( const QwtAbstractScaleDraw & ); + + class PrivateData; + PrivateData *d_data; +}; + +Q_DECLARE_OPERATORS_FOR_FLAGS( QwtAbstractScaleDraw::ScaleComponents ) + +#endif |