/**********************************************************************
** 
**
** Definition of TTQCanvas classes
**
** Created : 991211
**
** Copyright (C) 1999-2002 Trolltech AS.  All rights reserved.
**
** This file is part of the canvas module of the Qt GUI Toolkit.
**
** This file may be distributed under the terms of the Q Public License
** as defined by Trolltech AS of Norway and appearing in the file
** LICENSE.TQPL included in the packaging of this file.
**
** This file may be distributed and/or modified under the terms of the
** GNU General Public License version 2 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file.
**
** Licensees holding valid Qt Enterprise Edition licenses may use this
** file in accordance with the Qt Commercial License Agreement provided
** with the Software.
**
** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
**
** See http://www.trolltech.com/pricing.html or email sales@trolltech.com for
**   information about Qt Commercial License Agreements.
** See http://www.trolltech.com/qpl/ for TQPL licensing information.
** See http://www.trolltech.com/gpl/ for GPL licensing information.
**
** Contact info@trolltech.com if any conditions of this licensing are
** not clear to you.
**
**********************************************************************/

#ifndef TQCANVAS_H
#define TQCANVAS_H

#ifndef QT_H
#include "tqscrollview.h"
#include "tqpixmap.h"
#include "tqptrlist.h"
#include "tqbrush.h"
#include "tqpen.h"
#include "tqvaluelist.h"
#include "tqpointarray.h"
#endif // QT_H

#if !defined( QT_MODULE_CANVAS ) || defined( QT_LICENSE_PROFESSIONAL ) || defined( QT_INTERNAL_CANVAS )
#define TQM_EXPORT_CANVAS
#define TQM_TEMPLATE_EXTERN_CANVAS
#else
#define TQM_EXPORT_CANVAS Q_EXPORT
#define TQM_TEMPLATE_EXTERN_CANVAS Q_TEMPLATE_EXTERN
#endif

#ifndef QT_NO_CANVAS


class TTQCanvasSprite;
class TTQCanvasPolygonalItem;
class TTQCanvasRectangle;
class TTQCanvasPolygon;
class TTQCanvasEllipse;
class TTQCanvasText;
class TTQCanvasLine;
class TTQCanvasChunk;
class TTQCanvas;
class TTQCanvasItem;
class TTQCanvasView;
class TTQCanvasPixmap;


class TQM_EXPORT_CANVAS TTQCanvasItemList : public TTQValueList<TTQCanvasItem*> {
public:
    void sort();
    void drawUnique( TTQPainter& painter );
};


class TTQCanvasItemExtra;

class TQM_EXPORT_CANVAS TTQCanvasItem : public Qt
{
public:
    TTQCanvasItem(TTQCanvas* canvas);
    virtual ~TTQCanvasItem();

    double x() const
	{ return myx; }
    double y() const
	{ return myy; }
    double z() const
	{ return myz; } // (depth)

    virtual void moveBy(double dx, double dy);
    void move(double x, double y);
    void setX(double a) { move(a,y()); }
    void setY(double a) { move(x(),a); }
    void setZ(double a) { myz=a; changeChunks(); }

    bool animated() const;
    virtual void setAnimated(bool y);
    virtual void setVelocity( double vx, double vy);
    void setXVelocity( double vx ) { setVelocity(vx,yVelocity()); }
    void setYVelocity( double vy ) { setVelocity(xVelocity(),vy); }
    double xVelocity() const;
    double yVelocity() const;
    virtual void advance(int stage);

    virtual bool collidesWith( const TTQCanvasItem* ) const=0;

    TTQCanvasItemList collisions(bool exact /* NO DEFAULT */ ) const;

    virtual void setCanvas(TTQCanvas*);

    virtual void draw(TTQPainter&)=0;

    void show();
    void hide();

    virtual void setVisible(bool yes);
    bool isVisible() const
	{ return (bool)vis; }
    virtual void setSelected(bool yes);
    bool isSelected() const
	{ return (bool)sel; }
    virtual void setEnabled(bool yes);
    bool isEnabled() const
	{ return (bool)ena; }
    virtual void setActive(bool yes);
    bool isActive() const
	{ return (bool)act; }
#ifndef QT_NO_COMPAT
    bool visible() const
	{ return (bool)vis; }
    bool selected() const
	{ return (bool)sel; }
    bool enabled() const
	{ return (bool)ena; }
    bool active() const
	{ return (bool)act; }
#endif

    enum RttiValues {
	Rtti_Item = 0,
	Rtti_Sprite = 1,
	Rtti_PolygonalItem = 2,
	Rtti_Text = 3,
	Rtti_Polygon = 4,
	Rtti_Rectangle = 5,
	Rtti_Ellipse = 6,
	Rtti_Line = 7,
	Rtti_Spline = 8
    };

    virtual int rtti() const;
    static int RTTI;

    virtual TTQRect boundingRect() const=0;
    virtual TTQRect boundingRectAdvanced() const;

    TTQCanvas* canvas() const
	{ return cnv; }

protected:
    void update() { changeChunks(); }

private:
    // For friendly subclasses...

    friend class TTQCanvasPolygonalItem;
    friend class TTQCanvasSprite;
    friend class TTQCanvasRectangle;
    friend class TTQCanvasPolygon;
    friend class TTQCanvasEllipse;
    friend class TTQCanvasText;
    friend class TTQCanvasLine;

    virtual TTQPointArray chunks() const;
    virtual void addToChunks();
    virtual void removeFromChunks();
    virtual void changeChunks();
    virtual bool collidesWith( const TTQCanvasSprite*,
			       const TTQCanvasPolygonalItem*,
			       const TTQCanvasRectangle*,
			       const TTQCanvasEllipse*,
			       const TTQCanvasText* ) const = 0;
    // End of friend stuff

    TTQCanvas* cnv;
    static TTQCanvas* current_canvas;
    double myx,myy,myz;
    TTQCanvasItemExtra *ext;
    TTQCanvasItemExtra& extra();
    uint ani:1;
    uint vis:1;
    uint val:1;
    uint sel:1;
    uint ena:1;
    uint act:1;
};


class TTQCanvasData;

class TQM_EXPORT_CANVAS TTQCanvas : public TQObject
{
    Q_OBJECT
public:
    TTQCanvas( TTQObject* parent = 0, const char* name = 0 );
    TTQCanvas(int w, int h);
    TTQCanvas( TTQPixmap p, int h, int v, int tilewidth, int tileheight );

    virtual ~TTQCanvas();

    virtual void setTiles( TTQPixmap tiles, int h, int v,
			   int tilewidth, int tileheight );
    virtual void setBackgroundPixmap( const TTQPixmap& p );
    TTQPixmap backgroundPixmap() const;

    virtual void setBackgroundColor( const TTQColor& c );
    TTQColor backgroundColor() const;

    virtual void setTile( int x, int y, int tilenum );
    int tile( int x, int y ) const
	{ return grid[x+y*htiles]; }

    int tilesHorizontally() const
	{ return htiles; }
    int tilesVertically() const
	{ return vtiles; }

    int tileWidth() const
	{ return tilew; }
    int tileHeight() const
	{ return tileh; }

    virtual void resize(int width, int height);
    int width() const
	{ return awidth; }
    int height() const
	{ return aheight; }
    TTQSize size() const
	{ return TTQSize(awidth,aheight); }
    TTQRect rect() const
	{ return TTQRect( 0, 0, awidth, aheight ); }
    bool onCanvas( int x, int y ) const
	{ return x>=0 && y>=0 && x<awidth && y<aheight; }
    bool onCanvas( const TTQPoint& p ) const
	{ return onCanvas(p.x(),p.y()); }
    bool validChunk( int x, int y ) const
	{ return x>=0 && y>=0 && x<chwidth && y<chheight; }
    bool validChunk( const TTQPoint& p ) const
	{ return validChunk(p.x(),p.y()); }

    int chunkSize() const
	{ return chunksize; }
    virtual void retune(int chunksize, int maxclusters=100);

    bool sameChunk(int x1, int y1, int x2, int y2) const
	{ return x1/chunksize==x2/chunksize && y1/chunksize==y2/chunksize; }
    virtual void setChangedChunk(int i, int j);
    virtual void setChangedChunkContaining(int x, int y);
    virtual void setAllChanged();
    virtual void setChanged(const TTQRect& area);
    virtual void setUnchanged(const TTQRect& area);

    // These call setChangedChunk.
    void addItemToChunk(TTQCanvasItem*, int i, int j);
    void removeItemFromChunk(TTQCanvasItem*, int i, int j);
    void addItemToChunkContaining(TTQCanvasItem*, int x, int y);
    void removeItemFromChunkContaining(TTQCanvasItem*, int x, int y);

    TTQCanvasItemList allItems();
    TTQCanvasItemList collisions( const TTQPoint&) const;
    TTQCanvasItemList collisions( const TTQRect&) const;
    TTQCanvasItemList collisions( const TTQPointArray& pa, const TTQCanvasItem* item,
				bool exact) const;

    void drawArea(const TTQRect&, TTQPainter* p, bool double_buffer=FALSE);

    // These are for TTQCanvasView to call
    virtual void addView(TTQCanvasView*);
    virtual void removeView(TTQCanvasView*);
    void drawCanvasArea(const TTQRect&, TTQPainter* p=0, bool double_buffer=TRUE);
    void drawViewArea( TTQCanvasView* view, TTQPainter* p, const TTQRect& r, bool dbuf );

    // These are for TTQCanvasItem to call
    virtual void addItem(TTQCanvasItem*);
    virtual void addAnimation(TTQCanvasItem*);
    virtual void removeItem(TTQCanvasItem*);
    virtual void removeAnimation(TTQCanvasItem*);

    virtual void setAdvancePeriod(int ms);
    virtual void setUpdatePeriod(int ms);

    virtual void setDoubleBuffering(bool y);

signals:
    void resized();

public slots:
    virtual void advance();
    virtual void update();

protected:
    virtual void drawBackground(TTQPainter&, const TTQRect& area);
    virtual void drawForeground(TTQPainter&, const TTQRect& area);

private:
    void init(int w, int h, int chunksze=16, int maxclust=100);

    TTQCanvasChunk& chunk(int i, int j) const;
    TTQCanvasChunk& chunkContaining(int x, int y) const;

    TTQRect changeBounds(const TTQRect& inarea);
    void drawChanges(const TTQRect& inarea);

    void ensureOffScrSize( int osw, int osh );
    TTQPixmap offscr;
    int awidth,aheight;
    int chunksize;
    int maxclusters;
    int chwidth,chheight;
    TTQCanvasChunk* chunks;

    TTQCanvasData* d;

    void initTiles(TTQPixmap p, int h, int v, int tilewidth, int tileheight);
    ushort *grid;
    ushort htiles;
    ushort vtiles;
    ushort tilew;
    ushort tileh;
    bool oneone;
    TTQPixmap pm;
    TTQTimer* update_timer;
    TTQColor bgcolor;
    bool debug_redraw_areas;
    bool dblbuf;

    friend void qt_unview(TTQCanvas* c);

#if defined(Q_DISABLE_COPY) // Disabled copy constructor and operator=
    TTQCanvas( const TTQCanvas & );
    TTQCanvas &operator=( const TTQCanvas & );
#endif
};

class TTQCanvasViewData;

class TQM_EXPORT_CANVAS TTQCanvasView : public TQScrollView
{
    Q_OBJECT
public:

    TTQCanvasView(TTQWidget* parent=0, const char* name=0, WFlags f=0);
    TTQCanvasView(TTQCanvas* viewing, TTQWidget* parent=0, const char* name=0, WFlags f=0);
    ~TTQCanvasView();

    TTQCanvas* canvas() const
	{ return viewing; }
    void setCanvas(TTQCanvas* v);

    const TTQWMatrix &worldMatrix() const;
    const TTQWMatrix &inverseWorldMatrix() const;
    bool setWorldMatrix( const TTQWMatrix & );

protected:
    void drawContents( TTQPainter*, int cx, int cy, int cw, int ch );
    TTQSize sizeHint() const;

private:
    void drawContents( TTQPainter* );
    TTQCanvas* viewing;
    TTQCanvasViewData* d;
    friend void qt_unview(TTQCanvas* c);

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

private:
#if defined(Q_DISABLE_COPY) // Disabled copy constructor and operator=
    TTQCanvasView( const TTQCanvasView & );
    TTQCanvasView &operator=( const TTQCanvasView & );
#endif
};


class TQM_EXPORT_CANVAS TTQCanvasPixmap : public TQPixmap
{
public:
#ifndef QT_NO_IMAGEIO
    TTQCanvasPixmap(const TTQString& datafilename);
#endif
    TTQCanvasPixmap(const TTQImage& image);
    TTQCanvasPixmap(const TTQPixmap&, const TTQPoint& hotspot);
    ~TTQCanvasPixmap();

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

private:
#if defined(Q_DISABLE_COPY)
    TTQCanvasPixmap( const TTQCanvasPixmap & );
    TTQCanvasPixmap &operator=( const TTQCanvasPixmap & );
#endif
    void init(const TTQImage&);
    void init(const TTQPixmap& pixmap, int hx, int hy);

    friend class TTQCanvasSprite;
    friend class TTQCanvasPixmapArray;
    friend bool qt_testCollision(const TTQCanvasSprite* s1, const TTQCanvasSprite* s2);

    int hotx,hoty;

    TTQImage* collision_mask;
};


class TQM_EXPORT_CANVAS TQCanvasPixmapArray
{
public:
    TTQCanvasPixmapArray();
#ifndef QT_NO_IMAGEIO
    TTQCanvasPixmapArray(const TTQString& datafilenamepattern, int framecount=0);
#endif
    // this form is deprecated
    TTQCanvasPixmapArray(TTQPtrList<TTQPixmap>, TTQPtrList<TTQPoint> hotspots);

    TTQCanvasPixmapArray(TTQValueList<TTQPixmap>, TTQPointArray hotspots = TTQPointArray() );
    ~TTQCanvasPixmapArray();

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

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

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

private:
#if defined(Q_DISABLE_COPY)
    TTQCanvasPixmapArray( const TTQCanvasPixmapArray & );
    TTQCanvasPixmapArray &operator=( const TTQCanvasPixmapArray & );
#endif
#ifndef QT_NO_IMAGEIO
    bool readPixmaps(const TTQString& datafilenamepattern, int framecount, bool maskonly);
#endif

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


class TQM_EXPORT_CANVAS TTQCanvasSprite : public TQCanvasItem
{
public:
    TTQCanvasSprite(TTQCanvasPixmapArray* array, TTQCanvas* canvas);

    void setSequence(TTQCanvasPixmapArray* seq);

    virtual ~TTQCanvasSprite();

    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 TTQCanvasItem* ) const;

    TTQRect 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;
    TTQCanvasPixmap* image() const
	{ return images->image(frm); }
    virtual TTQCanvasPixmap* imageAdvanced() const;
    TTQCanvasPixmap* image(int f) const
	{ return images->image(f); }
    virtual void advance(int stage);

public:
    void draw(TTQPainter& painter);

private:
#if defined(Q_DISABLE_COPY)
    TTQCanvasSprite( const TTQCanvasSprite & );
    TTQCanvasSprite &operator=( const TTQCanvasSprite & );
#endif
    void addToChunks();
    void removeFromChunks();
    void changeChunks();

    int frm;
    ushort anim_val;
    uint anim_state:2;
    uint anim_type:14;
    bool collidesWith( const TTQCanvasSprite*,
		       const TTQCanvasPolygonalItem*,
		       const TTQCanvasRectangle*,
		       const TTQCanvasEllipse*,
		       const TTQCanvasText* ) const;

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

    TTQCanvasPixmapArray* images;
};

class TTQPolygonalProcessor;

class TQM_EXPORT_CANVAS TTQCanvasPolygonalItem : public TQCanvasItem
{
public:
    TTQCanvasPolygonalItem(TTQCanvas* canvas);
    virtual ~TTQCanvasPolygonalItem();

    bool collidesWith( const TTQCanvasItem* ) const;

    virtual void setPen(TTQPen p);
    virtual void setBrush(TTQBrush b);

    TTQPen pen() const
	{ return pn; }
    TTQBrush brush() const
	{ return br; }

    virtual TTQPointArray areaPoints() const=0;
    virtual TTQPointArray areaPointsAdvanced() const;
    TTQRect boundingRect() const;

    int rtti() const;
    static int RTTI;

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

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

    void invalidate();
    bool isValid() const
	{ return (bool)val; }

private:
    void scanPolygon( const TTQPointArray& pa, int winding,
		      TTQPolygonalProcessor& process ) const;
    TTQPointArray chunks() const;

    bool collidesWith( const TTQCanvasSprite*,
		       const TTQCanvasPolygonalItem*,
		       const TTQCanvasRectangle*,
		       const TTQCanvasEllipse*,
		       const TTQCanvasText* ) const;

    TTQBrush br;
    TTQPen pn;
    uint wind:1;
};


class TQM_EXPORT_CANVAS TTQCanvasRectangle : public TQCanvasPolygonalItem
{
public:
    TTQCanvasRectangle(TTQCanvas* canvas);
    TTQCanvasRectangle(const TTQRect&, TTQCanvas* canvas);
    TTQCanvasRectangle(int x, int y, int width, int height, TTQCanvas* canvas);

    ~TTQCanvasRectangle();

    int width() const;
    int height() const;
    void setSize(int w, int h);
    TTQSize size() const
	{ return TTQSize(w,h); }
    TTQPointArray areaPoints() const;
    TTQRect rect() const
	{ return TTQRect(int(x()),int(y()),w,h); }

    bool collidesWith( const TTQCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(TTQPainter &);
    TTQPointArray chunks() const;

private:
    bool collidesWith(   const TTQCanvasSprite*,
			 const TTQCanvasPolygonalItem*,
			 const TTQCanvasRectangle*,
			 const TTQCanvasEllipse*,
			 const TTQCanvasText* ) const;

    int w, h;
};


class TQM_EXPORT_CANVAS TTQCanvasPolygon : public TQCanvasPolygonalItem
{
public:
    TTQCanvasPolygon(TTQCanvas* canvas);
    ~TTQCanvasPolygon();
    void setPoints(TTQPointArray);
    TTQPointArray points() const;
    void moveBy(double dx, double dy);

    TTQPointArray areaPoints() const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(TTQPainter &);
    TTQPointArray poly;
};


class TQM_EXPORT_CANVAS TTQCanvasSpline : public TQCanvasPolygon
{
public:
    TTQCanvasSpline(TTQCanvas* canvas);
    ~TTQCanvasSpline();

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

    int rtti() const;
    static int RTTI;

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


class TQM_EXPORT_CANVAS TTQCanvasLine : public TQCanvasPolygonalItem
{
public:
    TTQCanvasLine(TTQCanvas* canvas);
    ~TTQCanvasLine();
    void setPoints(int x1, int y1, int x2, int y2);

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

    int rtti() const;
    static int RTTI;

    void setPen(TTQPen p);

protected:
    void drawShape(TTQPainter &);
    TTQPointArray areaPoints() const;

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


class TQM_EXPORT_CANVAS TTQCanvasEllipse : public TQCanvasPolygonalItem
{

public:
    TTQCanvasEllipse( TTQCanvas* canvas );
    TTQCanvasEllipse( int width, int height, TTQCanvas* canvas );
    TTQCanvasEllipse( int width, int height, int startangle, int angle,
		    TTQCanvas* canvas );

    ~TTQCanvasEllipse();

    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; }
    TTQPointArray areaPoints() const;

    bool collidesWith( const TTQCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    void drawShape(TTQPainter &);

private:
    bool collidesWith( const TTQCanvasSprite*,
		       const TTQCanvasPolygonalItem*,
		       const TTQCanvasRectangle*,
		       const TTQCanvasEllipse*,
		       const TTQCanvasText* ) const;
    int w, h;
    int a1, a2;
};


class TTQCanvasTextExtra;

class TQM_EXPORT_CANVAS TTQCanvasText : public TQCanvasItem
{
public:
    TTQCanvasText(TTQCanvas* canvas);
    TTQCanvasText(const TTQString&, TTQCanvas* canvas);
    TTQCanvasText(const TTQString&, TTQFont, TTQCanvas* canvas);

    virtual ~TTQCanvasText();

    void setText( const TTQString& );
    void setFont( const TTQFont& );
    void setColor( const TTQColor& );
    TTQString text() const;
    TTQFont font() const;
    TTQColor color() const;

    void moveBy(double dx, double dy);

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

    TTQRect boundingRect() const;

    bool collidesWith( const TTQCanvasItem* ) const;

    int rtti() const;
    static int RTTI;

protected:
    virtual void draw(TTQPainter&);

private:
#if defined(Q_DISABLE_COPY)
    TTQCanvasText( const TTQCanvasText & );
    TTQCanvasText &operator=( const TTQCanvasText & );
#endif
    void addToChunks();
    void removeFromChunks();
    void changeChunks();

    void setRect();
    TTQRect brect;
    TTQString txt;
    int flags;
    TTQFont fnt;
    TTQColor col;
    TTQCanvasTextExtra* extra;

    bool collidesWith(   const TTQCanvasSprite*,
			 const TTQCanvasPolygonalItem*,
			 const TTQCanvasRectangle*,
			 const TTQCanvasEllipse*,
			 const TTQCanvasText* ) const;
};

#define Q_DEFINED_QCANVAS
#include "tqwinexport.h"
#endif // QT_NO_CANVAS

#endif // TQCANVAS_H