kwqpainter.h

khtml在gtk上的移植版本

/*
 * Copyright (C) 2003 Apple Computer, Inc.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */

#ifndef QPAINTER_H_
#define QPAINTER_H_

#include "KWQNamespace.h"
#include "KWQPaintDevice.h"
#include "KWQColor.h"
#include "KWQPen.h"
#include "KWQBrush.h"
#include "KWQRect.h"
#include "KWQRegion.h"
#include "KWQPointArray.h"
#include "KWQString.h"
#include "KWQFontMetrics.h"
#include "WebCoreImageRendererFactory.h"

class QFont;
class QPixmap;
class QWidget;
class QPainterPrivate;

typedef struct _GdkDrawable GdkDrawable;
#if 0
struct  CGContext;
typedef CGContext* CGContextRef;
#endif
class QPainter : public Qt {
public:
    typedef enum { RTL, LTR } TextDirection;
    
    QPainter();
    QPainter(bool forPrinting);
    ~QPainter();

    QPaintDevice *device() const;
    
    const QFont &font() const;
    void setFont(const QFont &);
    QFontMetrics fontMetrics() const;
    
    const QPen &pen() const;
    void setPen(const QPen &);
    void setPen(PenStyle);
    void setPen(QRgb);
    
    const QBrush &QPainter::brush() const;
    void setBrush(const QBrush &);
    void setBrush(BrushStyle);
    void setBrush(QRgb);

    QRect xForm(const QRect &) const;

    void save();
    void restore();
    
    void drawRect(int, int, int, int);
    void drawLine(int, int, int, int);
    void drawLineSegments(const QPointArray &, int index=0, int nlines=-1);
    void drawEllipse(int, int, int, int);
    void drawArc(int, int, int, int, int, int);
    void drawPolyline(const QPointArray &, int index=0, int npoints=-1);
    void drawPolygon(const QPointArray &, bool winding=FALSE, int index=0, int npoints=-1);
    void drawConvexPolygon(const QPointArray &);

    void fillRect(int, int, int, int, const QBrush &);

    void drawPixmap(const QPoint &, const QPixmap &);
    void drawPixmap(const QPoint &, const QPixmap &, const QRect &);
    void drawPixmap(const QPoint &, const QPixmap &, const QRect &, const QString &); 
    void drawPixmap( int x, int y, const QPixmap &,
			    int sx=0, int sy=0, int sw=-1, int sh=-1, int compositeOperator=-1, CGContextRef context=0 );
    void drawPixmap( int x, int y, int w, int h, const QPixmap &,
			    int sx=0, int sy=0, int sw=-1, int sh=-1, int compositeOperator=-1, CGContextRef context=0 );
    void drawTiledPixmap(int, int, int, int, const QPixmap &, int sx=0, int sy=0, CGContextRef context=0 );

    void addClip(const QRect &);

    RasterOp rasterOp() const;
    void setRasterOp(RasterOp);

    void drawText(int x, int y, int, int, int alignmentFlags, const QString &);
    void drawHighlightForText(int x, int minX, int maxX, int y, int h, 
                  const QChar *, int length, int from, int to, int toAdd,
                  const QColor& backgroundColor, QPainter::TextDirection d, bool visuallyOrdered,
                  int letterSpacing, int wordSpacing, bool smallCaps);
    void drawText(int x, int y, const QChar *, int length, int from, int to, int toAdd,
                  const QColor& backgroundColor, QPainter::TextDirection d, bool visuallyOrdered,
                  int letterSpacing, int wordSpacing, bool smallCaps);
    void drawLineForText(int x, int y, int yOffset, int width);

    QColor selectedTextBackgroundColor() const;
    void setUsesInactiveTextBackgroundColor(bool u) { _usesInactiveTextBackgroundColor = u; }
    
    bool paintingDisabled() const;
    void setPaintingDisabled(bool);
        
    void beginTransparencyLayer(float opacity);
    void endTransparencyLayer();

    void setShadow(int x, int y, int blur, const QColor& color);
    void clearShadow();

    void initFocusRing(int width, int offset);
    void initFocusRing(int width, int offset, const QColor& color);
    void addFocusRingRect(int x, int y, int width, int height);
    void drawFocusRing();
    void clearFocusRing();
    void setDrawsFocusRing(bool flag) { _drawsFocusRing = flag; }

    CGContextRef currentContext();
    
    static int compositeOperatorFromString (QString aString);
    static int getCompositeOperation(CGContextRef context);
    static void setCompositeOperation (CGContextRef context, QString operation);
    static void setCompositeOperation (CGContextRef context, int operation);
    
    void setContext(CGContextRef context);    
private:
    // no copying or assignment
    QPainter(const QPainter &);
    QPainter &operator=(const QPainter &);

    void _setColorFromBrush();
    void _setColorFromPen();
#if !KWIQ
    // A fillRect designed to work around buggy behavior in NSRectFill.
    void _fillRect(float x, float y, float w, float h, const QColor& color);
#endif

    void _drawPoints(const QPointArray &_points, bool winding, int index, int _npoints, bool fill);

    void _updateRenderer();

    QPainterPrivate *data;
    bool _isForPrinting;
    bool _usesInactiveTextBackgroundColor;
    bool _drawsFocusRing;
};

#endif