qcanvas-h.html

QT 下载资料仅供参考

private:
    void drawContents( QPainter* );
    QCanvas* viewing;
    QCanvasViewData* d;
    friend void qt_unview(QCanvas* c);

private slots:
    void cMoving(int,int);
    void updateContentsSize();
};


class QM_EXPORT_CANVAS QCanvasPixmap : public QPixmap
{
public:
#ifndef QT_NO_IMAGEIO
    QCanvasPixmap(const QString& datafilename);
#endif
    QCanvasPixmap(const QImage& image);
    QCanvasPixmap(const QPixmap&, const QPoint& hotspot);
    ~QCanvasPixmap();

    int offsetX() const
	{ return hotx; }
    int offsetY() const
	{ return hoty; }
    void setOffset(int x, int y) { hotx = x; hoty = y; }

private:
    void init(const QImage&);
    void init(const QPixmap& pixmap, int hx, int hy);

    friend class QCanvasSprite;
    friend class QCanvasPixmapArray;
    friend bool qt_testCollision(const QCanvasSprite* s1, const QCanvasSprite* s2);

    int hotx,hoty;

    QImage* collision_mask;
};


class QM_EXPORT_CANVAS QCanvasPixmapArray
{
public:
    QCanvasPixmapArray();
#ifndef QT_NO_IMAGEIO
    QCanvasPixmapArray(const QString& datafilenamepattern, int framecount=0);
#endif
    // this form is deprecated
    QCanvasPixmapArray(QPtrList<QPixmap>, QPtrList<QPoint> hotspots);

    QCanvasPixmapArray(QValueList<QPixmap>, QPointArray hotspots = QPointArray() );
    ~QCanvasPixmapArray();

#ifndef QT_NO_IMAGEIO
    bool readPixmaps(const QString& datafilenamepattern, int framecount=0);
    bool readCollisionMasks(const QString& filenamepattern);
#endif

    // deprecated
    bool operator!(); // Failure check.
    bool isValid() const;

    QCanvasPixmap* image(int i) const
	{ return img ? img[i] : 0; }
    void setImage(int i, QCanvasPixmap* p);
    uint count() const
	{ return (uint)framecount; }

private:
#ifndef QT_NO_IMAGEIO
    bool readPixmaps(const QString& datafilenamepattern, int framecount, bool maskonly);
#endif

    void reset();
    int framecount;
    QCanvasPixmap** img;
};


class QM_EXPORT_CANVAS QCanvasSprite : public QCanvasItem
{
public:
    QCanvasSprite(QCanvasPixmapArray* array, QCanvas* canvas);

    void setSequence(QCanvasPixmapArray* seq);

    virtual ~QCanvasSprite();

    void move(double x, double y);
    virtual void move(double x, double y, int frame);
    void setFrame(int);
    enum FrameAnimationType { Cycle, Oscillate };
    virtual void setFrameAnimation(FrameAnimationType=Cycle, int step=1, int state=0);
    int frame() const
	{ return frm; }
    int frameCount() const
	{ return images->count(); }

    int rtti() const;
    static int RTTI;

    bool collidesWith( const QCanvasItem* ) const;

    QRect boundingRect() const;

    // is there a reason for these to be protected? Lars
//protected:

    int width() const;
    int height() const;

    int leftEdge() const;
    int topEdge() const;
    int rightEdge() const;
    int bottomEdge() const;

    int leftEdge(int nx) const;
    int topEdge(int ny) const;
    int rightEdge(int nx) const;
    int bottomEdge(int ny) const;
    QCanvasPixmap* image() const
	{ return images->image(frm); }
    virtual QCanvasPixmap* imageAdvanced() const;
    QCanvasPixmap* image(int f) const
	{ return images->image(f); }
    virtual void advance(int stage);

public:
    void draw(QPainter& painter);

private:
    void addToChunks();
    void removeFromChunks();
    void changeChunks();

    int frm;
    ushort anim_val;
    uint anim_state:2;
    uint anim_type:14;
    bool collidesWith( const QCanvasSprite*,
		       const QCanvasPolygonalItem*,
		       const QCanvasRectangle*,
		       const QCanvasEllipse*,
		       const QCanvasText* ) const;

    friend bool qt_testCollision( const QCanvasSprite* s1,
				  const QCanvasSprite* s2 );

    QCanvasPixmapArray* images;
};

class QPolygonalProcessor;

class QM_EXPORT_CANVAS QCanvasPolygonalItem : public QCanvasItem
{
public:
    QCanvasPolygonalItem(QCanvas* canvas);
    virtual ~QCanvasPolygonalItem();

    bool collidesWith( const QCanvasItem* ) const;

    virtual void setPen(QPen p);
    virtual void setBrush(QBrush b);

    QPen pen() const
	{ return pn; }
    QBrush brush() const
	{ return br; }

    virtual QPointArray areaPoints() const=0;
    virtual QPointArray areaPointsAdvanced() const;
    QRect boundingRect() const;

    int rtti() const;
    static int RTTI;

protected:
    void draw(QPainter &);
    virtual void drawShape(QPainter &) = 0;

    bool winding() const;
    void setWinding(bool);

private:
    void scanPolygon( const QPointArray& pa, int winding,
		      QPolygonalProcessor& process ) const;
    QPointArray chunks() const;

    bool collidesWith( const QCanvasSprite*,
		       const QCanvasPolygonalItem*,
		       const QCanvasRectangle*,
		       const QCanvasEllipse*,
		       const QCanvasText* ) const;

    QBrush br;
    QPen pn;
    uint wind:1;
};


class QM_EXPORT_CANVAS QCanvasRectangle : public QCanvasPolygonalItem
{
public:
    QCanvasRectangle(QCanvas* canvas);
    QCanvasRectangle(const QRect&, QCanvas* canvas);
    QCanvasRectangle(int x, int y, int width, int height, QCanvas* canvas);

    ~QCanvasRectangle();

    int width() const;
    int height() const;
    void setSize(int w, int h);
    QSize size() const
	{ return QSize(w,h); }
    QPointArray areaPoints() const;
    QRect rect() const
	{ return QRect(int(x()),int(y()),w,h); }

    bool collidesWith( const QCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(QPainter &);
    QPointArray chunks() const;

private:
    bool collidesWith(   const QCanvasSprite*,
			 const QCanvasPolygonalItem*,
			 const QCanvasRectangle*,
			 const QCanvasEllipse*,
			 const QCanvasText* ) const;

    int w, h;
};


class QM_EXPORT_CANVAS QCanvasPolygon : public QCanvasPolygonalItem
{
public:
    QCanvasPolygon(QCanvas* canvas);
    ~QCanvasPolygon();
    void setPoints(QPointArray);
    QPointArray points() const;
    void moveBy(double dx, double dy);

    QPointArray areaPoints() const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(QPainter &);
    QPointArray poly;
};


class QM_EXPORT_CANVAS QCanvasSpline : public QCanvasPolygon
{
public:
    QCanvasSpline(QCanvas* canvas);
    ~QCanvasSpline();

    void setControlPoints(QPointArray, bool closed=TRUE);
    QPointArray controlPoints() const;
    bool closed() const;

    int rtti() const;
    static int RTTI;

private:
    void recalcPoly();
    QPointArray bez;
    bool cl;
};


class QM_EXPORT_CANVAS QCanvasLine : public QCanvasPolygonalItem
{
public:
    QCanvasLine(QCanvas* canvas);
    ~QCanvasLine();
    void setPoints(int x1, int y1, int x2, int y2);

    QPoint startPoint() const
	{ return QPoint(x1,y1); }
    QPoint endPoint() const
	{ return QPoint(x2,y2); }

    int rtti() const;
    static int RTTI;

    void setPen(QPen p);

protected:
    void drawShape(QPainter &);
    QPointArray areaPoints() const;

private:
    int x1,y1,x2,y2;
};


class QM_EXPORT_CANVAS QCanvasEllipse : public QCanvasPolygonalItem
{

public:
    QCanvasEllipse( QCanvas* canvas );
    QCanvasEllipse( int width, int height, QCanvas* canvas );
    QCanvasEllipse( int width, int height, int startangle, int angle,
		    QCanvas* canvas );

    ~QCanvasEllipse();

    int width() const;
    int height() const;
    void setSize(int w, int h);
    void setAngles(int start, int length);
    int angleStart() const
	{ return a1; }
    int angleLength() const
	{ return a2; }
    QPointArray areaPoints() const;

    bool collidesWith( const QCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(QPainter &);

private:
    bool collidesWith( const QCanvasSprite*,
		       const QCanvasPolygonalItem*,
		       const QCanvasRectangle*,
		       const QCanvasEllipse*,
		       const QCanvasText* ) const;
    int w, h;
    int a1, a2;
};


class QCanvasTextExtra;

class QM_EXPORT_CANVAS QCanvasText : public QCanvasItem
{
public:
    QCanvasText(QCanvas* canvas);
    QCanvasText(const QString&, QCanvas* canvas);
    QCanvasText(const QString&, QFont, QCanvas* canvas);

    virtual ~QCanvasText();

    void setText( const QString& );
    void setFont( const QFont& );
    void setColor( const QColor& );
    QString text() const;
    QFont font() const;
    QColor color() const;

    void moveBy(double dx, double dy);

    int textFlags() const
	{ return flags; }
    void setTextFlags(int);

    QRect boundingRect() const;

    bool collidesWith( const QCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    virtual void draw(QPainter&);

private:
    void addToChunks();
    void removeFromChunks();
    void changeChunks();

    void setRect();
    QRect brect;
    QString txt;
    int flags;
    QFont fnt;
    QColor col;
    QCanvasTextExtra* extra;

    bool collidesWith(   const QCanvasSprite*,
			 const QCanvasPolygonalItem*,
			 const QCanvasRectangle*,
			 const QCanvasEllipse*,
			 const QCanvasText* ) const;
};


#endif // QT_NO_CANVAS

#endif // QCANVAS_H
</pre>
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<a href="http://www.trolltech.com">Trolltech</a><td><a href="http://www.trolltech.com/trademarks.html">Trademarks</a>
<td align=right><div align=right>Qt version 3.0.5</div>
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