qwt_painter.h

/* -*- 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_PAINTER_H
#define QWT_PAINTER_H

#include <qpoint.h>
#include <qrect.h>
#include "qwt_global.h"
#include "qwt_layout_metrics.h"
#include "qwt_polygon.h"

class QPainter;
class QBrush;
class QColor;
class QWidget;
class QwtScaleMap;
class QwtColorMap;
class QwtDoubleInterval;

#if QT_VERSION < 0x040000
class QColorGroup;
class QSimpleRichText;
#else
class QPalette;
class QTextDocument;
#endif

#if defined(Q_WS_X11)
// Warning: QCOORD_MIN, QCOORD_MAX are wrong on X11.
#define QWT_COORD_MAX 16384
#define QWT_COORD_MIN (-QWT_COORD_MAX - 1)
#else
#define QWT_COORD_MAX 2147483647
#define QWT_COORD_MIN -QWT_COORD_MAX - 1
#endif

class QWT_EXPORT QwtPainter
{
public:
    static void setMetricsMap(const QPaintDevice *layout,
        const QPaintDevice *device);
    static void setMetricsMap(const QwtMetricsMap &);
    static void resetMetricsMap();
    static const QwtMetricsMap &metricsMap();

    static void setDeviceClipping(bool);
    static bool deviceClipping();

    static void setClipRect(QPainter *, const QRect &);

    static void drawText(QPainter *, int x, int y, 
        const QString &);
    static void drawText(QPainter *, const QPoint &, 
        const QString &);
    static void drawText(QPainter *, int x, int y, int w, int h, 
        int flags, const QString &);
    static void drawText(QPainter *, const QRect &, 
        int flags, const QString &);

#ifndef QT_NO_RICHTEXT
#if QT_VERSION < 0x040000
    static void drawSimpleRichText(QPainter *, const QRect &,
        int flags, QSimpleRichText &);
#else
    static void drawSimpleRichText(QPainter *, const QRect &,
        int flags, QTextDocument &);
#endif
#endif

    static void drawRect(QPainter *, int x, int y, int w, int h);
    static void drawRect(QPainter *, const QRect &rect);
    static void fillRect(QPainter *, const QRect &, const QBrush &); 

    static void drawEllipse(QPainter *, const QRect &);
    static void drawPie(QPainter *, const QRect & r, int a, int alen);

    static void drawLine(QPainter *, int x1, int y1, int x2, int y2);
    static void drawLine(QPainter *, const QPoint &p1, const QPoint &p2);
    static void drawPolygon(QPainter *, const QwtPolygon &pa);
    static void drawPolyline(QPainter *, const QwtPolygon &pa);
    static void drawPoint(QPainter *, int x, int y);

#if QT_VERSION < 0x040000
    static void drawRoundFrame(QPainter *, const QRect &,
        int width, const QColorGroup &cg, bool sunken);
#else
    static void drawRoundFrame(QPainter *, const QRect &,
        int width, const QPalette &, bool sunken);
#endif
    static void drawFocusRect(QPainter *, QWidget *);
    static void drawFocusRect(QPainter *, QWidget *, const QRect &);

    static QwtPolygon clip(const QwtPolygon &);

    static void drawColorBar(QPainter *painter, 
        const QwtColorMap &, const QwtDoubleInterval &,
        const QwtScaleMap &, Qt::Orientation, const QRect &);

#if QT_VERSION < 0x040000
    static void setSVGMode(bool on);
    static bool isSVGMode();
#endif

private:
    static void drawColoredArc(QPainter *, const QRect &,
        int peak, int arc, int intervall, const QColor &c1, const QColor &c2);

    static const QRect &deviceClipRect();

    static bool d_deviceClipping;
    static QwtMetricsMap d_metricsMap;
#if QT_VERSION < 0x040000
    static bool d_SVGMode;
#endif
};

inline void QwtPainter::drawLine(QPainter *painter,
    const QPoint &p1, const QPoint &p2)
{
    drawLine(painter, p1.x(), p1.y(), p2.x(), p2.y());
}

#endif

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