include/wx/graphics.h

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        wx/graphics.h
   3 // Purpose:     graphics context header
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // Copyright:   (c) Stefan Csomor
   8 // RCS-ID:      $Id$
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifndef _WX_GRAPHICS_H_
  13 #define _WX_GRAPHICS_H_
  14
  15 #if wxUSE_GRAPHICS_CONTEXT
  16
  17 #include "wx/geometry.h"
  18 #include "wx/dynarray.h"
  19
  20 class WXDLLIMPEXP_CORE wxWindowDC;
  21 class WXDLLIMPEXP_CORE wxGraphicsContext;
  22 class WXDLLIMPEXP_CORE wxGraphicsPath;
  23 class WXDLLIMPEXP_CORE wxGraphicsMatrix;
  24 class WXDLLIMPEXP_CORE wxGraphicsFigure;
  25 class WXDLLIMPEXP_CORE wxGraphicsRenderer;
  26 class WXDLLIMPEXP_CORE wxGraphicsPen;
  27 class WXDLLIMPEXP_CORE wxGraphicsBrush;
  28 class WXDLLIMPEXP_CORE wxGraphicsFont;
  29
  30 /*
  31  * notes about the graphics context apis
  32  *
  33  * angles : are measured in radians, 0.0 being in direction of positiv x axis, PI/2 being
  34  * in direction of positive y axis.
  35  */
  36
  37 // Base class of all objects used for drawing in the new graphics API, the always point back to their
  38 // originating rendering engine, there is no dynamic unloading of a renderer currently allowed,
  39 // these references are not counted
  40
  41 //
  42 // The data used by objects like graphics pens etc is ref counted, in order to avoid unnecessary expensive
  43 // duplication. Any operation on a shared instance that results in a modified state, uncouples this
  44 // instance from the other instances that were shared - using copy on write semantics
  45 //
  46
  47 class WXDLLIMPEXP_CORE wxGraphicsObjectRefData : public wxObjectRefData
  48 {
  49 public :
  50     wxGraphicsObjectRefData( wxGraphicsRenderer* renderer );
  51     wxGraphicsObjectRefData( const wxGraphicsObjectRefData* data );
  52     wxGraphicsRenderer* GetRenderer() const ;
  53     virtual wxGraphicsObjectRefData* Clone() const ;
  54
  55 protected :
  56     wxGraphicsRenderer* m_renderer;
  57 } ;
  58
  59 class WXDLLIMPEXP_CORE wxGraphicsObject : public wxObject
  60 {
  61 public :
  62     wxGraphicsObject() ;
  63     wxGraphicsObject( wxGraphicsRenderer* renderer ) ;
  64     virtual ~wxGraphicsObject() ;
  65
  66     bool IsNull() const ;
  67
  68     // returns the renderer that was used to create this instance, or NULL if it has not been initialized yet
  69     wxGraphicsRenderer* GetRenderer() const ;
  70     wxGraphicsObjectRefData* GetGraphicsData() const ;
  71 protected :
  72     virtual wxObjectRefData* CreateRefData() const;
  73     virtual wxObjectRefData* CloneRefData(const wxObjectRefData* data) const;
  74
  75     DECLARE_DYNAMIC_CLASS(wxGraphicsObject);
  76 } ;
  77
  78 class WXDLLIMPEXP_CORE wxGraphicsPen : public wxGraphicsObject
  79 {
  80 public :
  81     wxGraphicsPen() {}
  82     virtual ~wxGraphicsPen() {}
  83 private :
  84     DECLARE_DYNAMIC_CLASS(wxGraphicsPen)
  85 } ;
  86
  87 extern WXDLLEXPORT_DATA(wxGraphicsPen) wxNullGraphicsPen;
  88
  89 class WXDLLIMPEXP_CORE wxGraphicsBrush : public wxGraphicsObject
  90 {
  91 public :
  92     wxGraphicsBrush() {}
  93     virtual ~wxGraphicsBrush() {}
  94 private :
  95     DECLARE_DYNAMIC_CLASS(wxGraphicsBrush)
  96 } ;
  97
  98 extern WXDLLEXPORT_DATA(wxGraphicsBrush) wxNullGraphicsBrush;
  99
 100 class WXDLLIMPEXP_CORE wxGraphicsFont : public wxGraphicsObject
 101 {
 102 public :
 103     wxGraphicsFont() {}
 104     virtual ~wxGraphicsFont() {}
 105 private :
 106     DECLARE_DYNAMIC_CLASS(wxGraphicsFont)
 107 } ;
 108
 109 extern WXDLLEXPORT_DATA(wxGraphicsFont) wxNullGraphicsFont;
 110
 111
 112 class WXDLLIMPEXP_CORE wxGraphicsMatrixData : public wxGraphicsObjectRefData
 113 {
 114 public :
 115     wxGraphicsMatrixData( wxGraphicsRenderer* renderer) :
 116        wxGraphicsObjectRefData(renderer) {}
 117
 118        virtual ~wxGraphicsMatrixData() {}
 119
 120        // concatenates the matrix
 121        virtual void Concat( const wxGraphicsMatrixData *t ) = 0;
 122
 123        // sets the matrix to the respective values
 124        virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 125            wxDouble tx=0.0, wxDouble ty=0.0) = 0;
 126
 127        // makes this the inverse matrix
 128        virtual void Invert() = 0;
 129
 130        // returns true if the elements of the transformation matrix are equal ?
 131        virtual bool IsEqual( const wxGraphicsMatrixData* t) const  = 0;
 132
 133        // return true if this is the identity matrix
 134        virtual bool IsIdentity() const = 0;
 135
 136        //
 137        // transformation
 138        //
 139
 140        // add the translation to this matrix
 141        virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
 142
 143        // add the scale to this matrix
 144        virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
 145
 146        // add the rotation to this matrix (radians)
 147        virtual void Rotate( wxDouble angle ) = 0;
 148
 149        //
 150        // apply the transforms
 151        //
 152
 153        // applies that matrix to the point
 154        virtual void TransformPoint( wxDouble *x, wxDouble *y ) const = 0;
 155
 156        // applies the matrix except for translations
 157        virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const =0;
 158
 159        // returns the native representation
 160        virtual void * GetNativeMatrix() const = 0;
 161 } ;
 162
 163 class WXDLLIMPEXP_CORE wxGraphicsMatrix : public wxGraphicsObject
 164 {
 165 public :
 166     wxGraphicsMatrix() {}
 167
 168     virtual ~wxGraphicsMatrix() {}
 169
 170     // concatenates the matrix
 171     virtual void Concat( const wxGraphicsMatrix *t );
 172     void Concat( const wxGraphicsMatrix &t ) { Concat( &t ); }
 173
 174     // sets the matrix to the respective values
 175     virtual void Set(wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 176         wxDouble tx=0.0, wxDouble ty=0.0);
 177
 178     // makes this the inverse matrix
 179     virtual void Invert();
 180
 181     // returns true if the elements of the transformation matrix are equal ?
 182     virtual bool IsEqual( const wxGraphicsMatrix* t) const;
 183     bool IsEqual( const wxGraphicsMatrix& t) const { return IsEqual( &t ); }
 184
 185     // return true if this is the identity matrix
 186     virtual bool IsIdentity() const;
 187
 188     //
 189     // transformation
 190     //
 191
 192     // add the translation to this matrix
 193     virtual void Translate( wxDouble dx , wxDouble dy );
 194
 195     // add the scale to this matrix
 196     virtual void Scale( wxDouble xScale , wxDouble yScale );
 197
 198     // add the rotation to this matrix (radians)
 199     virtual void Rotate( wxDouble angle );
 200
 201     //
 202     // apply the transforms
 203     //
 204
 205     // applies that matrix to the point
 206     virtual void TransformPoint( wxDouble *x, wxDouble *y ) const;
 207
 208     // applies the matrix except for translations
 209     virtual void TransformDistance( wxDouble *dx, wxDouble *dy ) const;
 210
 211     // returns the native representation
 212     virtual void * GetNativeMatrix() const;
 213
 214     const wxGraphicsMatrixData* GetMatrixData() const
 215     { return (const wxGraphicsMatrixData*) GetRefData(); }
 216     wxGraphicsMatrixData* GetMatrixData()
 217     { return (wxGraphicsMatrixData*) GetRefData(); }
 218
 219 private :
 220     DECLARE_DYNAMIC_CLASS(wxGraphicsMatrix)
 221 } ;
 222
 223 extern WXDLLEXPORT_DATA(wxGraphicsMatrix) wxNullGraphicsMatrix;
 224
 225 class WXDLLIMPEXP_CORE wxGraphicsPathData : public wxGraphicsObjectRefData
 226 {
 227 public :
 228     wxGraphicsPathData(wxGraphicsRenderer* renderer) : wxGraphicsObjectRefData(renderer) {}
 229     virtual ~wxGraphicsPathData() {}
 230
 231     //
 232     // These are the path primitives from which everything else can be constructed
 233     //
 234
 235     // begins a new subpath at (x,y)
 236     virtual void MoveToPoint( wxDouble x, wxDouble y ) = 0;
 237
 238     // adds a straight line from the current point to (x,y)
 239     virtual void AddLineToPoint( wxDouble x, wxDouble y ) = 0;
 240
 241     // adds a cubic Bezier curve from the current point, using two control points and an end point
 242     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) = 0;
 243
 244     // adds another path
 245     virtual void AddPath( const wxGraphicsPathData* path ) =0;
 246
 247     // closes the current sub-path
 248     virtual void CloseSubpath() = 0;
 249
 250     // gets the last point of the current path, (0,0) if not yet set
 251     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const = 0;
 252
 253     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 254     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) = 0;
 255
 256     //
 257     // These are convenience functions which - if not available natively will be assembled
 258     // using the primitives from above
 259     //
 260
 261     // adds a quadratic Bezier curve from the current point, using a control point and an end point
 262     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
 263
 264     // appends a rectangle as a new closed subpath
 265     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 266
 267     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 268     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
 269
 270     // appends a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 271     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
 272
 273     // appends an ellipse
 274     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 275
 276     // appends a rounded rectangle
 277     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 278
 279     // returns the native path
 280     virtual void * GetNativePath() const = 0;
 281
 282     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 283     virtual void UnGetNativePath(void *p) const= 0;
 284
 285     // transforms each point of this path by the matrix
 286     virtual void Transform( const wxGraphicsMatrixData* matrix ) =0;
 287
 288     // gets the bounding box enclosing all points (possibly including control points)
 289     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h) const=0;
 290
 291     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE) const=0;
 292 };
 293
 294 class WXDLLIMPEXP_CORE wxGraphicsPath : public wxGraphicsObject
 295 {
 296 public :
 297     wxGraphicsPath()  {}
 298     virtual ~wxGraphicsPath() {}
 299
 300     //
 301     // These are the path primitives from which everything else can be constructed
 302     //
 303
 304     // begins a new subpath at (x,y)
 305     virtual void MoveToPoint( wxDouble x, wxDouble y );
 306     void MoveToPoint( const wxPoint2DDouble& p);
 307
 308     // adds a straight line from the current point to (x,y)
 309     virtual void AddLineToPoint( wxDouble x, wxDouble y );
 310     void AddLineToPoint( const wxPoint2DDouble& p);
 311
 312     // adds a cubic Bezier curve from the current point, using two control points and an end point
 313     virtual void AddCurveToPoint( wxDouble cx1, wxDouble cy1, wxDouble cx2, wxDouble cy2, wxDouble x, wxDouble y ) ;
 314     void AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e);
 315
 316     // adds another path
 317     virtual void AddPath( const wxGraphicsPath& path );
 318
 319     // closes the current sub-path
 320     virtual void CloseSubpath() ;
 321
 322     // gets the last point of the current path, (0,0) if not yet set
 323     virtual void GetCurrentPoint( wxDouble* x, wxDouble* y) const;
 324     wxPoint2DDouble GetCurrentPoint() const;
 325
 326     // adds an arc of a circle centering at (x,y) with radius (r) from startAngle to endAngle
 327     virtual void AddArc( wxDouble x, wxDouble y, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise ) ;
 328     void AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise);
 329
 330     //
 331     // These are convenience functions which - if not available natively will be assembled
 332     // using the primitives from above
 333     //
 334
 335     // adds a quadratic Bezier curve from the current point, using a control point and an end point
 336     virtual void AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y );
 337
 338     // appends a rectangle as a new closed subpath
 339     virtual void AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h );
 340
 341     // appends an ellipsis as a new closed subpath fitting the passed rectangle
 342     virtual void AddCircle( wxDouble x, wxDouble y, wxDouble r );
 343
 344     // appends a an arc to two tangents connecting (current) to (x1,y1) and (x1,y1) to (x2,y2), also a straight line from (current) to (x1,y1)
 345     virtual void AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r ) ;
 346
 347     // appends an ellipse
 348     virtual void AddEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 349
 350     // appends a rounded rectangle
 351     virtual void AddRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 352
 353     // returns the native path
 354     virtual void * GetNativePath() const;
 355
 356     // give the native path returned by GetNativePath() back (there might be some deallocations necessary)
 357     virtual void UnGetNativePath(void *p)const;
 358
 359     // transforms each point of this path by the matrix
 360     virtual void Transform( const wxGraphicsMatrix& matrix );
 361
 362     // gets the bounding box enclosing all points (possibly including control points)
 363     virtual void GetBox(wxDouble *x, wxDouble *y, wxDouble *w, wxDouble *h)const;
 364     wxRect2DDouble GetBox()const;
 365
 366     virtual bool Contains( wxDouble x, wxDouble y, int fillStyle = wxODDEVEN_RULE)const;
 367     bool Contains( const wxPoint2DDouble& c, int fillStyle = wxODDEVEN_RULE)const;
 368
 369     const wxGraphicsPathData* GetPathData() const
 370     { return (const wxGraphicsPathData*) GetRefData(); }
 371     wxGraphicsPathData* GetPathData()
 372     { return (wxGraphicsPathData*) GetRefData(); }
 373
 374 private :
 375     DECLARE_DYNAMIC_CLASS(wxGraphicsPath)
 376 } ;
 377
 378 extern WXDLLEXPORT_DATA(wxGraphicsPath) wxNullGraphicsPath;
 379
 380
 381 class WXDLLIMPEXP_CORE wxGraphicsContext : public wxGraphicsObject
 382 {
 383 public:
 384     wxGraphicsContext(wxGraphicsRenderer* renderer);
 385
 386     virtual ~wxGraphicsContext();
 387
 388     static wxGraphicsContext* Create( const wxWindowDC& dc) ;
 389
 390     static wxGraphicsContext* CreateFromNative( void * context ) ;
 391
 392     static wxGraphicsContext* CreateFromNativeWindow( void * window ) ;
 393
 394     static wxGraphicsContext* Create( wxWindow* window ) ;
 395
 396     // create a context that can be used for measuring texts only, no drawing allowed
 397     static wxGraphicsContext * Create();
 398
 399     wxGraphicsPath CreatePath() const;
 400
 401     virtual wxGraphicsPen CreatePen(const wxPen& pen) const;
 402
 403     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) const;
 404
 405     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
 406     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 407         const wxColour&c1, const wxColour&c2) const;
 408
 409     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
 410     // with radius r and color cColor
 411     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 412         const wxColour &oColor, const wxColour &cColor) const;
 413
 414     // sets the font
 415     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) const;
 416
 417     // create a 'native' matrix corresponding to these values
 418     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 419         wxDouble tx=0.0, wxDouble ty=0.0) const;
 420
 421     // push the current state of the context, ie the transformation matrix on a stack
 422     virtual void PushState() = 0;
 423
 424     // pops a stored state from the stack
 425     virtual void PopState() = 0;
 426
 427     // clips drawings to the region, combined to current clipping region
 428     virtual void Clip( const wxRegion &region ) = 0;
 429
 430     // clips drawings to the rect
 431     virtual void Clip( wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 432
 433     // resets the clipping to original extent
 434     virtual void ResetClip() = 0 ;
 435
 436     // returns the native context
 437     virtual void * GetNativeContext() = 0;
 438
 439     //
 440     // transformation : changes the current transformation matrix CTM of the context
 441     //
 442
 443     // translate
 444     virtual void Translate( wxDouble dx , wxDouble dy ) = 0;
 445
 446     // scale
 447     virtual void Scale( wxDouble xScale , wxDouble yScale ) = 0;
 448
 449     // rotate (radians)
 450     virtual void Rotate( wxDouble angle ) = 0;
 451
 452     // concatenates this transform with the current transform of this context
 453     virtual void ConcatTransform( const wxGraphicsMatrix& matrix ) = 0;
 454
 455     // sets the transform of this context
 456     virtual void SetTransform( const wxGraphicsMatrix& matrix ) = 0;
 457
 458     // gets the matrix of this context
 459     virtual wxGraphicsMatrix GetTransform() const = 0;
 460     //
 461     // setting the paint
 462     //
 463
 464     // sets the pen
 465     virtual void SetPen( const wxGraphicsPen& pen );
 466
 467     void SetPen( const wxPen& pen );
 468
 469     // sets the brush for filling
 470     virtual void SetBrush( const wxGraphicsBrush& brush );
 471
 472     void SetBrush( const wxBrush& brush );
 473
 474     // sets the font
 475     virtual void SetFont( const wxGraphicsFont& font );
 476
 477     void SetFont( const wxFont& font, const wxColour& colour );
 478
 479
 480     // strokes along a path with the current pen
 481     virtual void StrokePath( const wxGraphicsPath& path ) = 0;
 482
 483     // fills a path with the current brush
 484     virtual void FillPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE ) = 0;
 485
 486     // draws a path by first filling and then stroking
 487     virtual void DrawPath( const wxGraphicsPath& path, int fillStyle = wxODDEVEN_RULE );
 488
 489     //
 490     // text
 491     //
 492
 493     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y ) = 0;
 494
 495     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle );
 496
 497     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, const wxGraphicsBrush& backgroundBrush ) ;
 498
 499     virtual void DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle, const wxGraphicsBrush& backgroundBrush );
 500
 501     virtual void GetTextExtent( const wxString &text, wxDouble *width, wxDouble *height,
 502         wxDouble *descent, wxDouble *externalLeading ) const  = 0;
 503
 504     virtual void GetPartialTextExtents(const wxString& text, wxArrayDouble& widths) const = 0;
 505
 506     //
 507     // image support
 508     //
 509
 510     virtual void DrawBitmap( const wxBitmap &bmp, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 511
 512     virtual void DrawIcon( const wxIcon &icon, wxDouble x, wxDouble y, wxDouble w, wxDouble h ) = 0;
 513
 514     //
 515     // convenience methods
 516     //
 517
 518     // strokes a single line
 519     virtual void StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2);
 520
 521     // stroke lines connecting each of the points
 522     virtual void StrokeLines( size_t n, const wxPoint2DDouble *points);
 523
 524     // stroke disconnected lines from begin to end points
 525     virtual void StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints);
 526
 527     // draws a polygon
 528     virtual void DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle = wxODDEVEN_RULE );
 529
 530     // draws a polygon
 531     virtual void DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 532
 533     // draws an ellipse
 534     virtual void DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h);
 535
 536     // draws a rounded rectangle
 537     virtual void DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius);
 538
 539      // wrappers using wxPoint2DDouble TODO
 540
 541     // helper to determine if a 0.5 offset should be applied for the drawing operation
 542     virtual bool ShouldOffset() const { return false; }
 543
 544 protected :
 545
 546     wxGraphicsPen m_pen;
 547     wxGraphicsBrush m_brush;
 548     wxGraphicsFont m_font;
 549
 550 private :
 551     DECLARE_NO_COPY_CLASS(wxGraphicsContext)
 552     DECLARE_ABSTRACT_CLASS(wxGraphicsContext)
 553 };
 554
 555 #if 0
 556
 557 //
 558 // A graphics figure allows to cache path, pen etc creations, also will be a basis for layering/grouping elements
 559 //
 560
 561 class WXDLLIMPEXP_CORE wxGraphicsFigure : public wxGraphicsObject
 562 {
 563 public :
 564     wxGraphicsFigure(wxGraphicsRenderer* renderer) ;
 565
 566     virtual ~wxGraphicsFigure() ;
 567
 568     void SetPath( wxGraphicsMatrix* matrix );
 569
 570     void SetMatrix( wxGraphicsPath* path);
 571
 572     // draws this object on the context
 573     virtual void Draw( wxGraphicsContext* cg );
 574
 575     // returns the path of this object
 576     wxGraphicsPath* GetPath() { return m_path; }
 577
 578     // returns the transformation matrix of this object, may be null if there is no transformation necessary
 579     wxGraphicsMatrix* GetMatrix() { return m_matrix; }
 580
 581 private :
 582     wxGraphicsMatrix* m_matrix;
 583     wxGraphicsPath* m_path;
 584
 585     DECLARE_DYNAMIC_CLASS(wxGraphicsFigure)
 586 } ;
 587
 588 #endif
 589
 590 //
 591 // The graphics renderer is the instance corresponding to the rendering engine used, eg there is ONE core graphics renderer
 592 // instance on OSX. This instance is pointed back to by all objects created by it. Therefore you can create eg additional
 593 // paths at any point from a given matrix etc.
 594 //
 595
 596 class WXDLLIMPEXP_CORE wxGraphicsRenderer : public wxObject
 597 {
 598 public :
 599     wxGraphicsRenderer() {}
 600
 601     virtual ~wxGraphicsRenderer() {}
 602
 603     static wxGraphicsRenderer* GetDefaultRenderer();
 604
 605     // Context
 606
 607     virtual wxGraphicsContext * CreateContext( const wxWindowDC& dc) = 0 ;
 608
 609     virtual wxGraphicsContext * CreateContextFromNativeContext( void * context ) = 0;
 610
 611     virtual wxGraphicsContext * CreateContextFromNativeWindow( void * window ) = 0;
 612
 613     virtual wxGraphicsContext * CreateContext( wxWindow* window ) = 0;
 614
 615     // create a context that can be used for measuring texts only, no drawing allowed
 616     virtual wxGraphicsContext * CreateMeasuringContext() = 0;
 617
 618     // Path
 619
 620     virtual wxGraphicsPath CreatePath() = 0;
 621
 622     // Matrix
 623
 624     virtual wxGraphicsMatrix CreateMatrix( wxDouble a=1.0, wxDouble b=0.0, wxDouble c=0.0, wxDouble d=1.0,
 625         wxDouble tx=0.0, wxDouble ty=0.0) = 0;
 626
 627     // Paints
 628
 629     virtual wxGraphicsPen CreatePen(const wxPen& pen) = 0 ;
 630
 631     virtual wxGraphicsBrush CreateBrush(const wxBrush& brush ) = 0 ;
 632
 633     // sets the brush to a linear gradient, starting at (x1,y1) with color c1 to (x2,y2) with color c2
 634     virtual wxGraphicsBrush CreateLinearGradientBrush( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2,
 635         const wxColour&c1, const wxColour&c2) = 0;
 636
 637     // sets the brush to a radial gradient originating at (xo,yc) with color oColor and ends on a circle around (xc,yc)
 638     // with radius r and color cColor
 639     virtual wxGraphicsBrush CreateRadialGradientBrush( wxDouble xo, wxDouble yo, wxDouble xc, wxDouble yc, wxDouble radius,
 640         const wxColour &oColor, const wxColour &cColor) = 0;
 641
 642    // sets the font
 643     virtual wxGraphicsFont CreateFont( const wxFont &font , const wxColour &col = *wxBLACK ) = 0;
 644
 645 private :
 646     DECLARE_NO_COPY_CLASS(wxGraphicsRenderer)
 647     DECLARE_ABSTRACT_CLASS(wxGraphicsRenderer)
 648 } ;
 649
 650 #endif
 651
 652 #endif // _WX_GRAPHICS_H_