Qwt User's Guide: qwt_abstract_scale_draw.h Source File

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# qwt_abstract_scale_draw.h

    00001 /* -*- mode: C++ ; c-file-style: "stroustrup" -*- *****************************
    00002  * Qwt Widget Library
    00003  * Copyright (C) 1997   Josef Wilgen
    00004  * Copyright (C) 2002   Uwe Rathmann
    00005  *
    00006  * This library is free software; you can redistribute it and/or
    00007  * modify it under the terms of the Qwt License, Version 1.0
    00008  *****************************************************************************/
    00009
    00010 #ifndef QWT_ABSTRACT_SCALE_DRAW_H
    00011 #define QWT_ABSTRACT_SCALE_DRAW_H
    00012
    00013 #include "qwt_global.h"
    00014 #include "qwt_scale_div.h"
    00015 #include "qwt_text.h"
    00016
    00017
    00018 #if QT_VERSION < 0x040000
    00019 class QColorGroup;
    00020 #else
    00021 class QPalette;
    00022 #endif
    00023 class QPainter;
    00024 class QFont;
    00025 class QwtScaleTransformation;
    00026 class QwtScaleMap;
    00027
    00037 class QWT_EXPORT QwtAbstractScaleDraw
    00038 {
    00039 public:
    00040
    00052     enum ScaleComponent
    00053     {
    00054         Backbone = 1,
    00055         Ticks = 2,
    00056         Labels = 4
    00057     };
    00058
    00059     QwtAbstractScaleDraw();
    00060     QwtAbstractScaleDraw( const QwtAbstractScaleDraw & );
    00061     virtual ~QwtAbstractScaleDraw();
    00062
    00063     QwtAbstractScaleDraw &operator=(const QwtAbstractScaleDraw &);
    00064
    00065     void setScaleDiv(const QwtScaleDiv &s);
    00066     const QwtScaleDiv& scaleDiv() const;
    00067
    00068     void setTransformation(QwtScaleTransformation *);
    00069     const QwtScaleMap &map() const;
    00070
    00071     void enableComponent(ScaleComponent, bool enable = true);
    00072     bool hasComponent(ScaleComponent) const;
    00073
    00074     void setTickLength(QwtScaleDiv::TickType, int length);
    00075     int tickLength(QwtScaleDiv::TickType) const;
    00076     int majTickLength() const;
    00077
    00078     void setSpacing(int margin);
    00079     int spacing() const;
    00080
    00081 #if QT_VERSION < 0x040000
    00082     virtual void draw(QPainter *, const QColorGroup &) const;
    00083 #else
    00084     virtual void draw(QPainter *, const QPalette &) const;
    00085 #endif
    00086
    00087     virtual QwtText label(double) const;
    00088
    00098     virtual int extent(const QPen &, const QFont &) const = 0;
    00099
    00100     void setMinimumExtent(int);
    00101     int minimumExtent() const;
    00102
    00103     QwtScaleMap &scaleMap();
    00104
    00105 protected:
    00115     virtual void drawTick(QPainter *painter, double value, int len) const = 0;
    00116
    00123     virtual void drawBackbone(QPainter *painter) const = 0;
    00124
    00133     virtual void drawLabel(QPainter *painter, double value) const = 0;
    00134
    00135     void invalidateCache();
    00136     const QwtText &tickLabel(const QFont &, double value) const;
    00137
    00138 private:
    00139     int operator==(const QwtAbstractScaleDraw &) const;
    00140     int operator!=(const QwtAbstractScaleDraw &) const;
    00141
    00142     class PrivateData;
    00143     PrivateData *d_data;
    00144 };
    00145
    00146 #endif