src/common/graphcmn.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/graphcmn.cpp
   3 // Purpose:     graphics context methods common to all platforms
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // For compilers that support precompilation, includes "wx.h".
  13 #include "wx/wxprec.h"
  14
  15 #if defined(__BORLANDC__)
  16     #pragma hdrstop
  17 #endif
  18
  19 #if wxUSE_GRAPHICS_CONTEXT
  20
  21 #include "wx/graphics.h"
  22
  23 #ifndef WX_PRECOMP
  24     #include "wx/icon.h"
  25     #include "wx/bitmap.h"
  26     #include "wx/dcmemory.h"
  27     #include "wx/region.h"
  28 #endif
  29
  30 #if !defined(wxMAC_USE_CORE_GRAPHICS_BLEND_MODES)
  31 #define wxMAC_USE_CORE_GRAPHICS_BLEND_MODES 0
  32 #endif
  33
  34 //-----------------------------------------------------------------------------
  35 // constants
  36 //-----------------------------------------------------------------------------
  37
  38 static const double RAD2DEG = 180.0 / M_PI;
  39
  40 //-----------------------------------------------------------------------------
  41 // Local functions
  42 //-----------------------------------------------------------------------------
  43
  44 static inline double DegToRad(double deg)
  45 {
  46     return (deg * M_PI) / 180.0;
  47 }
  48
  49 //-----------------------------------------------------------------------------
  50
  51 wxPoint2DDouble wxGraphicsPath::GetCurrentPoint()
  52 {
  53     wxDouble x,y ;
  54     GetCurrentPoint(x,y);
  55     return wxPoint2DDouble(x,y);
  56 }
  57
  58 void wxGraphicsPath::MoveToPoint( const wxPoint2DDouble& p)
  59 {
  60     MoveToPoint( p.m_x , p.m_y);
  61 }
  62
  63 void wxGraphicsPath::AddLineToPoint( const wxPoint2DDouble& p)
  64 {
  65     AddLineToPoint( p.m_x , p.m_y);
  66 }
  67
  68 void wxGraphicsPath::AddCurveToPoint( const wxPoint2DDouble& c1, const wxPoint2DDouble& c2, const wxPoint2DDouble& e)
  69 {
  70     AddCurveToPoint(c1.m_x, c1.m_y, c2.m_x, c2.m_y, e.m_x, e.m_y);
  71 }
  72
  73 void wxGraphicsPath::AddArc( const wxPoint2DDouble& c, wxDouble r, wxDouble startAngle, wxDouble endAngle, bool clockwise)
  74 {
  75     AddArc(c.m_x, c.m_y, r, startAngle, endAngle, clockwise);
  76 }
  77
  78 //
  79 // Emulations
  80 //
  81
  82 void wxGraphicsPath::AddQuadCurveToPoint( wxDouble cx, wxDouble cy, wxDouble x, wxDouble y )
  83 {
  84     // calculate using degree elevation to a cubic bezier
  85     wxPoint2DDouble c1 ;
  86     wxPoint2DDouble c2 ;
  87
  88     wxPoint2DDouble start = GetCurrentPoint() ;
  89     wxPoint2DDouble end(x,y);
  90     wxPoint2DDouble c(cx,cy);
  91     c1 = wxDouble(1/3.0) * start + wxDouble(2/3.0) * c;
  92     c2 = wxDouble(2/3.0) * c + wxDouble(1/3.0) * end ;
  93     AddCurveToPoint(c1.m_x,c1.m_y,c2.m_x,c2.m_y,x,y);
  94 }
  95
  96 void wxGraphicsPath::AddRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h )
  97 {
  98     MoveToPoint(x,y);
  99     AddLineToPoint(x,y+h);
 100     AddLineToPoint(x+w,y+h);
 101     AddLineToPoint(x+w,y);
 102     CloseSubpath();
 103 }
 104
 105 void wxGraphicsPath::AddCircle( wxDouble x, wxDouble y, wxDouble r )
 106 {
 107     MoveToPoint(x+r,y);
 108     AddArc( x,y,r,0,2*M_PI,false);
 109     CloseSubpath();
 110 }
 111
 112 // draws 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)
 113 void wxGraphicsPath::AddArcToPoint( wxDouble x1, wxDouble y1 , wxDouble x2, wxDouble y2, wxDouble r )
 114 {
 115     wxPoint2DDouble current = GetCurrentPoint();
 116     wxPoint2DDouble p1(x1,y1);
 117     wxPoint2DDouble p2(x2,y2);
 118
 119     wxPoint2DDouble v1 = current - p1 ;
 120     v1.Normalize();
 121     wxPoint2DDouble v2 = p2 - p1 ;
 122     v2.Normalize();
 123
 124     wxDouble alpha = v1.GetVectorAngle() - v2.GetVectorAngle();
 125
 126     if ( alpha < 0 )
 127         alpha = 360 + alpha ;
 128     // TODO obtuse angles
 129
 130     alpha = DegToRad(alpha);
 131
 132     wxDouble dist = r / sin(alpha/2) * cos(alpha/2) ;
 133     // calculate tangential points
 134     wxPoint2DDouble t1 = dist*v1 + p1 ;
 135     wxPoint2DDouble t2 = dist*v2 + p1 ;
 136
 137     wxPoint2DDouble nv1 = v1 ;
 138     nv1.SetVectorAngle(v1.GetVectorAngle()-90);
 139     wxPoint2DDouble c = t1 + r*nv1;
 140
 141     wxDouble a1 = v1.GetVectorAngle()+90 ;
 142     wxDouble a2 = v2.GetVectorAngle()-90 ;
 143
 144     AddLineToPoint(t1);
 145     AddArc(c.m_x,c.m_y,r,DegToRad(a1),DegToRad(a2),true);
 146     AddLineToPoint(p2);
 147 }
 148
 149 //-----------------------------------------------------------------------------
 150 // wxGraphicsContext Convenience Methods
 151 //-----------------------------------------------------------------------------
 152
 153 void wxGraphicsContext::DrawPath( const wxGraphicsPath *path, int fillStyle )
 154 {
 155     FillPath( path , fillStyle );
 156     StrokePath( path );
 157 }
 158
 159 void wxGraphicsContext::DrawText( const wxString &str, wxDouble x, wxDouble y, wxDouble angle )
 160 {
 161     Translate(x,y) ;
 162     Rotate( -angle );
 163     DrawText( str , 0, 0 );
 164     Rotate( angle );
 165     Translate(-x,-y) ;
 166 }
 167
 168 void wxGraphicsContext::StrokeLine( wxDouble x1, wxDouble y1, wxDouble x2, wxDouble y2)
 169 {
 170     wxGraphicsPath* path = CreatePath();
 171     path->MoveToPoint(x1, y1) ;
 172     path->AddLineToPoint( x2, y2 );
 173     StrokePath( path );
 174     delete path;
 175 }
 176
 177 void wxGraphicsContext::DrawRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h)
 178 {
 179     wxGraphicsPath* path = CreatePath();
 180     path->AddRectangle( x , y , w , h );
 181     DrawPath( path );
 182     delete path;
 183 }
 184
 185 void wxGraphicsContext::DrawEllipse( wxDouble x, wxDouble y, wxDouble w, wxDouble h)
 186 {
 187     wxGraphicsPath* path = CreatePath();
 188     if ( w == h )
 189     {
 190         path->AddCircle( x+w/2,y+w/2,w/2);
 191         DrawPath(path);
 192     }
 193     else
 194     {
 195         PushState();
 196         Translate(x+w/2,y+h/2);
 197         wxDouble factor = ((wxDouble) w) / h ;
 198         Scale( factor , 1.0) ;
 199         path->AddCircle(0,0,h/2);
 200         DrawPath(path);
 201         PopState();
 202     }
 203     delete path;
 204 }
 205
 206 void wxGraphicsContext::DrawRoundedRectangle( wxDouble x, wxDouble y, wxDouble w, wxDouble h, wxDouble radius)
 207 {
 208     wxGraphicsPath* path = CreatePath();
 209     if ( radius == 0)
 210     {
 211         path->AddRectangle( x , y , w , h );
 212         DrawPath( path );
 213     }
 214     else
 215     {
 216         PushState();
 217         Translate( x , y );
 218
 219         path->MoveToPoint(w, h / 2);
 220         path->AddArcToPoint(w, h, w / 2, h, radius);
 221         path->AddArcToPoint(0, h, 0, h / 2, radius);
 222         path->AddArcToPoint(0, 0, w / 2, 0, radius);
 223         path->AddArcToPoint(w, 0, w, h / 2, radius);
 224         path->CloseSubpath();
 225         DrawPath( path );
 226         PopState();
 227     }
 228     delete path;
 229 }
 230
 231 void wxGraphicsContext::StrokeLines( size_t n, const wxPoint2DDouble *points)
 232 {
 233     wxASSERT(n > 1);
 234     wxGraphicsPath* path = CreatePath();
 235     path->MoveToPoint(points[0].m_x, points[0].m_y) ;
 236     for ( size_t i = 1 ; i < n; ++i)
 237         path->AddLineToPoint( points[i].m_x, points[i].m_y );
 238     StrokePath( path );
 239     delete path;
 240 }
 241
 242 void wxGraphicsContext::DrawLines( size_t n, const wxPoint2DDouble *points, int fillStyle)
 243 {
 244     wxASSERT(n > 1);
 245     wxGraphicsPath* path = CreatePath();
 246     path->MoveToPoint(points[0].m_x, points[0].m_y) ;
 247     for ( size_t i = 1 ; i < n; ++i)
 248         path->AddLineToPoint( points[i].m_x, points[i].m_y );
 249     DrawPath( path , fillStyle);
 250     delete path;
 251 }
 252
 253 void wxGraphicsContext::StrokeLines( size_t n, const wxPoint2DDouble *beginPoints, const wxPoint2DDouble *endPoints)
 254 {
 255     wxASSERT(n > 0);
 256     wxGraphicsPath* path = CreatePath();
 257     for ( size_t i = 0 ; i < n; ++i)
 258     {
 259         path->MoveToPoint(beginPoints[i].m_x, beginPoints[i].m_y) ;
 260         path->AddLineToPoint( endPoints[i].m_x, endPoints[i].m_y );
 261     }
 262     StrokePath( path );
 263     delete path;
 264 }
 265
 266 IMPLEMENT_ABSTRACT_CLASS(wxGCDC, wxObject)
 267
 268 //-----------------------------------------------------------------------------
 269 // wxDC bridge class
 270 //-----------------------------------------------------------------------------
 271
 272 wxGCDC::wxGCDC()
 273 {
 274     Init();
 275 }
 276
 277
 278 wxGCDC::wxGCDC(const wxWindowDC& dc)
 279 {
 280     Init();
 281     m_graphicContext = wxGraphicsContext::Create(dc);
 282     m_ok = true;
 283     if ( dc.GetFont().Ok())
 284         m_graphicContext->SetFont(dc.GetFont());
 285     if ( dc.GetPen().Ok())
 286         m_graphicContext->SetPen(dc.GetPen());
 287     if ( dc.GetBrush().Ok())
 288         m_graphicContext->SetBrush(dc.GetBrush());
 289     m_graphicContext->SetTextColor(dc.GetTextForeground());
 290 }
 291
 292 void wxGCDC::Init()
 293 {
 294     m_ok = false;
 295     m_colour = true;
 296     m_mm_to_pix_x = mm2pt;
 297     m_mm_to_pix_y = mm2pt;
 298
 299     m_pen = *wxBLACK_PEN;
 300     m_font = *wxNORMAL_FONT;
 301     m_brush = *wxWHITE_BRUSH;
 302
 303     m_graphicContext = NULL;
 304 }
 305
 306
 307 wxGCDC::~wxGCDC()
 308 {
 309     delete m_graphicContext;
 310 }
 311
 312 void wxGCDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool WXUNUSED(useMask) )
 313 {
 314     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid DC") );
 315     wxCHECK_RET( bmp.Ok(), wxT("wxGCDC(cg)::DoDrawBitmap - invalid bitmap") );
 316
 317     wxCoord xx = LogicalToDeviceX(x);
 318     wxCoord yy = LogicalToDeviceY(y);
 319     wxCoord w = bmp.GetWidth();
 320     wxCoord h = bmp.GetHeight();
 321     wxCoord ww = LogicalToDeviceXRel(w);
 322     wxCoord hh = LogicalToDeviceYRel(h);
 323
 324     m_graphicContext->DrawBitmap( bmp, xx , yy , ww , hh );
 325 }
 326
 327 void wxGCDC::DoDrawIcon( const wxIcon &icon, wxCoord x, wxCoord y )
 328 {
 329     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid DC") );
 330     wxCHECK_RET( icon.Ok(), wxT("wxGCDC(cg)::DoDrawIcon - invalid icon") );
 331
 332     wxCoord xx = LogicalToDeviceX(x);
 333     wxCoord yy = LogicalToDeviceY(y);
 334     wxCoord w = icon.GetWidth();
 335     wxCoord h = icon.GetHeight();
 336     wxCoord ww = LogicalToDeviceXRel(w);
 337     wxCoord hh = LogicalToDeviceYRel(h);
 338
 339     m_graphicContext->DrawIcon( icon , xx, yy, ww, hh );
 340 }
 341
 342 void wxGCDC::DoSetClippingRegion( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxCoord WXUNUSED(width), wxCoord WXUNUSED(height) )
 343 {
 344     // TODO Clipping
 345 #if 0
 346     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 347
 348     wxCoord xx, yy, ww, hh;
 349     xx = LogicalToDeviceX(x);
 350     yy = LogicalToDeviceY(y);
 351     ww = LogicalToDeviceXRel(width);
 352     hh = LogicalToDeviceYRel(height);
 353
 354     CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
 355     CGRect clipRect = CGRectMake( xx , yy , ww, hh );
 356     CGContextClipToRect( cgContext , clipRect );
 357
 358     //    SetRectRgn( (RgnHandle) m_macCurrentClipRgn , xx , yy , xx + ww , yy + hh );
 359     //    SectRgn( (RgnHandle) m_macCurrentClipRgn , (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn );
 360
 361     if ( m_clipping )
 362     {
 363         m_clipX1 = wxMax( m_clipX1, xx );
 364         m_clipY1 = wxMax( m_clipY1, yy );
 365         m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 366         m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 367     }
 368     else
 369     {
 370         m_clipping = true;
 371
 372         m_clipX1 = xx;
 373         m_clipY1 = yy;
 374         m_clipX2 = xx + ww;
 375         m_clipY2 = yy + hh;
 376     }
 377
 378     // TODO: as soon as we don't reset the context for each operation anymore
 379     // we have to update the context as well
 380 #endif
 381
 382 }
 383
 384 void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
 385 {
 386     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
 387
 388     if (region.Empty())
 389     {
 390         DestroyClippingRegion();
 391         return;
 392     }
 393
 394     wxCoord x, y, w, h;
 395     region.GetBox( x, y, w, h );
 396     wxCoord xx, yy, ww, hh;
 397     xx = LogicalToDeviceX(x);
 398     yy = LogicalToDeviceY(y);
 399     ww = LogicalToDeviceXRel(w);
 400     hh = LogicalToDeviceYRel(h);
 401
 402     // if we have a scaling that we cannot map onto native regions
 403     // we must use the box
 404     if ( ww != w || hh != h )
 405     {
 406         wxGCDC::DoSetClippingRegion( x, y, w, h );
 407     }
 408     else
 409     {
 410 #if 0
 411         CopyRgn( (RgnHandle) region.GetWXHRGN() , (RgnHandle) m_macCurrentClipRgn );
 412         if ( xx != x || yy != y )
 413             OffsetRgn( (RgnHandle) m_macCurrentClipRgn , xx - x , yy - y );
 414         SectRgn( (RgnHandle)m_macCurrentClipRgn , (RgnHandle)m_macBoundaryClipRgn , (RgnHandle)m_macCurrentClipRgn );
 415 #endif
 416
 417         if ( m_clipping )
 418         {
 419             m_clipX1 = wxMax( m_clipX1, xx );
 420             m_clipY1 = wxMax( m_clipY1, yy );
 421             m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 422             m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 423         }
 424         else
 425         {
 426             m_clipping = true;
 427
 428             m_clipX1 = xx;
 429             m_clipY1 = yy;
 430             m_clipX2 = xx + ww;
 431             m_clipY2 = yy + hh;
 432         }
 433     }
 434 }
 435
 436 void wxGCDC::DestroyClippingRegion()
 437 {
 438     // TODO Clipping
 439 #if 0
 440     //    CopyRgn( (RgnHandle) m_macBoundaryClipRgn , (RgnHandle) m_macCurrentClipRgn );
 441
 442     CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
 443     CGContextRestoreGState( cgContext );
 444     CGContextSaveGState( cgContext );
 445
 446     m_graphicContext->SetPen( m_pen );
 447     m_graphicContext->SetBrush( m_brush );
 448
 449     m_clipping = false;
 450 #endif
 451
 452 }
 453
 454 void wxGCDC::DoGetSizeMM( int* width, int* height ) const
 455 {
 456     int w = 0, h = 0;
 457
 458     GetSize( &w, &h );
 459     if (width)
 460         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 461     if (height)
 462         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 463 }
 464
 465 void wxGCDC::SetTextForeground( const wxColour &col )
 466 {
 467     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 468
 469     if ( col != m_textForegroundColour )
 470     {
 471         m_textForegroundColour = col;
 472         m_graphicContext->SetTextColor( col );
 473     }
 474 }
 475
 476 void wxGCDC::SetTextBackground( const wxColour &col )
 477 {
 478     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 479
 480     m_textBackgroundColour = col;
 481 }
 482
 483 void wxGCDC::SetMapMode( int mode )
 484 {
 485     switch (mode)
 486     {
 487     case wxMM_TWIPS:
 488         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 489         break;
 490
 491     case wxMM_POINTS:
 492         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 493         break;
 494
 495     case wxMM_METRIC:
 496         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 497         break;
 498
 499     case wxMM_LOMETRIC:
 500         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 501         break;
 502
 503     case wxMM_TEXT:
 504     default:
 505         SetLogicalScale( 1.0, 1.0 );
 506         break;
 507     }
 508
 509     ComputeScaleAndOrigin();
 510 }
 511
 512 void wxGCDC::SetUserScale( double x, double y )
 513 {
 514     // allow negative ? -> no
 515     m_userScaleX = x;
 516     m_userScaleY = y;
 517     ComputeScaleAndOrigin();
 518 }
 519
 520 void wxGCDC::SetLogicalScale( double x, double y )
 521 {
 522     // allow negative ?
 523     m_logicalScaleX = x;
 524     m_logicalScaleY = y;
 525     ComputeScaleAndOrigin();
 526 }
 527
 528 void wxGCDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 529 {
 530     m_logicalOriginX = x * m_signX;   // is this still correct ?
 531     m_logicalOriginY = y * m_signY;
 532     ComputeScaleAndOrigin();
 533 }
 534
 535 void wxGCDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 536 {
 537     m_deviceOriginX = x;
 538     m_deviceOriginY = y;
 539     ComputeScaleAndOrigin();
 540 }
 541
 542 void wxGCDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 543 {
 544     m_signX = (xLeftRight ?  1 : -1);
 545     m_signY = (yBottomUp ? -1 :  1);
 546     ComputeScaleAndOrigin();
 547 }
 548
 549 wxSize wxGCDC::GetPPI() const
 550 {
 551     return wxSize(72, 72);
 552 }
 553
 554 int wxGCDC::GetDepth() const
 555 {
 556     return 32;
 557 }
 558
 559 void wxGCDC::ComputeScaleAndOrigin()
 560 {
 561     // this is a bit artificial, but we need to force wxGCDC to think
 562     // the pen has changed
 563     wxPen pen( GetPen() );
 564
 565     m_pen = wxNullPen;
 566     SetPen( pen );
 567 }
 568
 569 void wxGCDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 570 {
 571
 572 }
 573
 574 void wxGCDC::SetBackgroundMode( int mode )
 575 {
 576     m_backgroundMode = mode;
 577 }
 578
 579 void wxGCDC::SetFont( const wxFont &font )
 580 {
 581     m_font = font;
 582     if ( m_graphicContext )
 583         m_graphicContext->SetFont( font );
 584 }
 585
 586 void wxGCDC::SetPen( const wxPen &pen )
 587 {
 588     if ( m_pen == pen )
 589         return;
 590
 591     m_pen = pen;
 592     if ( m_graphicContext )
 593     {
 594         if ( m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT )
 595         {
 596             m_graphicContext->SetPen( m_pen );
 597         }
 598         else
 599         {
 600             // we have to compensate for moved device origins etc. otherwise patterned pens are standing still
 601             // eg when using a wxScrollWindow and scrolling around
 602             int origX = LogicalToDeviceX( 0 );
 603             int origY = LogicalToDeviceY( 0 );
 604             m_graphicContext->Translate( origX , origY );
 605             m_graphicContext->SetPen( m_pen );
 606             m_graphicContext->Translate( -origX , -origY );
 607         }
 608     }
 609 }
 610
 611 void wxGCDC::SetBrush( const wxBrush &brush )
 612 {
 613     if (m_brush == brush)
 614         return;
 615
 616     m_brush = brush;
 617     if ( m_graphicContext )
 618     {
 619         if ( brush.GetStyle() == wxSOLID || brush.GetStyle() == wxTRANSPARENT )
 620         {
 621             m_graphicContext->SetBrush( m_brush );
 622         }
 623         else
 624         {
 625             // we have to compensate for moved device origins etc. otherwise patterned brushes are standing still
 626             // eg when using a wxScrollWindow and scrolling around
 627             // TODO on MSW / GDIPlus this still occurs with hatched brushes
 628             int origX = LogicalToDeviceX(0);
 629             int origY = LogicalToDeviceY(0);
 630             m_graphicContext->Translate( origX , origY );
 631             m_graphicContext->SetBrush( m_brush );
 632             m_graphicContext->Translate( -origX , -origY );
 633         }
 634     }
 635 }
 636
 637 void wxGCDC::SetBackground( const wxBrush &brush )
 638 {
 639     if (m_backgroundBrush == brush)
 640         return;
 641
 642     m_backgroundBrush = brush;
 643     if (!m_backgroundBrush.Ok())
 644         return;
 645 }
 646
 647 void wxGCDC::SetLogicalFunction( int function )
 648 {
 649     if (m_logicalFunction == function)
 650         return;
 651
 652     m_logicalFunction = function;
 653 #if wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 654
 655     CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
 656     if ( m_logicalFunction == wxCOPY )
 657         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 658     else if ( m_logicalFunction == wxINVERT )
 659         CGContextSetBlendMode( cgContext, kCGBlendModeExclusion );
 660     else
 661         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 662 #endif
 663
 664 }
 665
 666 bool wxGCDC::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 667                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 668 {
 669     return false;
 670 }
 671
 672 bool wxGCDC::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 673 {
 674     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 675     return false;
 676 }
 677
 678 void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 679 {
 680     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 681
 682 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 683
 684     if ( m_logicalFunction != wxCOPY )
 685         return;
 686 #endif
 687
 688     wxCoord xx1 = LogicalToDeviceX(x1);
 689     wxCoord yy1 = LogicalToDeviceY(y1);
 690     wxCoord xx2 = LogicalToDeviceX(x2);
 691     wxCoord yy2 = LogicalToDeviceY(y2);
 692
 693     m_graphicContext->StrokeLine(xx1,yy1,xx2,yy2);
 694
 695     CalcBoundingBox(x1, y1);
 696     CalcBoundingBox(x2, y2);
 697 }
 698
 699 void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
 700 {
 701     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 702
 703     if ( m_logicalFunction != wxCOPY )
 704         return;
 705
 706     int w = 0, h = 0;
 707
 708     GetSize( &w, &h );
 709
 710     wxCoord xx = LogicalToDeviceX(x);
 711     wxCoord yy = LogicalToDeviceY(y);
 712     wxCoord xw = LogicalToDeviceX(w);
 713     wxCoord x0 = LogicalToDeviceX(0);
 714     wxCoord y0 = LogicalToDeviceY(0);
 715     wxCoord yh = LogicalToDeviceY(h);
 716
 717     m_graphicContext->StrokeLine(x0,yy,xw,yy);
 718     m_graphicContext->StrokeLine(xx,y0,xx,yh);
 719
 720     CalcBoundingBox(x0, y0);
 721     CalcBoundingBox(x0+xw, y0+yh);
 722 }
 723
 724 void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
 725                         wxCoord x2, wxCoord y2,
 726                         wxCoord xc, wxCoord yc )
 727 {
 728     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 729
 730     if ( m_logicalFunction != wxCOPY )
 731         return;
 732
 733     wxCoord xx1 = LogicalToDeviceX(x1);
 734     wxCoord yy1 = LogicalToDeviceY(y1);
 735     wxCoord xx2 = LogicalToDeviceX(x2);
 736     wxCoord yy2 = LogicalToDeviceY(y2);
 737     wxCoord xxc = LogicalToDeviceX(xc);
 738     wxCoord yyc = LogicalToDeviceY(yc);
 739
 740     double dx = xx1 - xxc;
 741     double dy = yy1 - yyc;
 742     double radius = sqrt((double)(dx * dx + dy * dy));
 743     wxCoord rad = (wxCoord)radius;
 744     double sa, ea;
 745     if (xx1 == xx2 && yy1 == yy2)
 746     {
 747         sa = 0.0;
 748         ea = 360.0;
 749     }
 750     else if (radius == 0.0)
 751     {
 752         sa = ea = 0.0;
 753     }
 754     else
 755     {
 756         sa = (xx1 - xxc == 0) ?
 757      (yy1 - yyc < 0) ? 90.0 : -90.0 :
 758              -atan2(double(yy1 - yyc), double(xx1 - xxc)) * RAD2DEG;
 759         ea = (xx2 - xxc == 0) ?
 760      (yy2 - yyc < 0) ? 90.0 : -90.0 :
 761              -atan2(double(yy2 - yyc), double(xx2 - xxc)) * RAD2DEG;
 762     }
 763
 764     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 765
 766     wxGraphicsPath* path = m_graphicContext->CreatePath();
 767     if ( fill && ((x1!=x2)||(y1!=y2)) )
 768         path->MoveToPoint( xxc, yyc );
 769     path->AddArc( xxc, yyc , rad , DegToRad(sa) , DegToRad(ea), false );
 770     if ( fill && ((x1!=x2)||(y1!=y2)) )
 771         path->AddLineToPoint( xxc, yyc );
 772     m_graphicContext->DrawPath(path);
 773     delete path;
 774 }
 775
 776 void wxGCDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 777                                 double sa, double ea )
 778 {
 779     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 780
 781     if ( m_logicalFunction != wxCOPY )
 782         return;
 783
 784     wxCoord xx = LogicalToDeviceX(x);
 785     wxCoord yy = LogicalToDeviceY(y);
 786     wxCoord ww = m_signX * LogicalToDeviceXRel(w);
 787     wxCoord hh = m_signY * LogicalToDeviceYRel(h);
 788
 789     // handle -ve width and/or height
 790     if (ww < 0)
 791     {
 792         ww = -ww;
 793         xx = xx - ww;
 794     }
 795     if (hh < 0)
 796     {
 797         hh = -hh;
 798         yy = yy - hh;
 799     }
 800
 801     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 802
 803     wxGraphicsPath* path = m_graphicContext->CreatePath();
 804     m_graphicContext->PushState();
 805     m_graphicContext->Translate(xx+ww/2,yy+hh/2);
 806     wxDouble factor = ((wxDouble) ww) / hh ;
 807     m_graphicContext->Scale( factor , 1.0) ;
 808     if ( fill && (sa!=ea) )
 809         path->MoveToPoint(0,0);
 810     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 811     // get clockwise angles
 812     path->AddArc( 0, 0, hh/2 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 813     if ( fill && (sa!=ea) )
 814         path->AddLineToPoint(0,0);
 815     m_graphicContext->DrawPath( path );
 816     m_graphicContext->PopState();
 817     delete path;
 818 }
 819
 820 void wxGCDC::DoDrawPoint( wxCoord x, wxCoord y )
 821 {
 822     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 823
 824     DoDrawLine( x , y , x + 1 , y + 1 );
 825 }
 826
 827 void wxGCDC::DoDrawLines(int n, wxPoint points[],
 828                          wxCoord xoffset, wxCoord yoffset)
 829 {
 830     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 831
 832 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 833
 834     if ( m_logicalFunction != wxCOPY )
 835         return;
 836 #endif
 837
 838     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n] ;
 839     for( int i = 0 ; i < n; ++i)
 840     {
 841         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 842         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 843     }
 844
 845     m_graphicContext->StrokeLines( n , pointsD) ;
 846     delete[] pointsD;
 847 }
 848
 849 #if wxUSE_SPLINES
 850 void wxGCDC::DoDrawSpline(wxList *points)
 851 {
 852     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 853
 854     if ( m_logicalFunction != wxCOPY )
 855         return;
 856
 857     wxGraphicsPath* path = m_graphicContext->CreatePath();
 858
 859     wxList::compatibility_iterator node = points->GetFirst();
 860     if (node == wxList::compatibility_iterator())
 861         // empty list
 862         return;
 863
 864     wxPoint *p = (wxPoint *)node->GetData();
 865
 866     wxCoord x1 = p->x;
 867     wxCoord y1 = p->y;
 868
 869     node = node->GetNext();
 870     p = (wxPoint *)node->GetData();
 871
 872     wxCoord x2 = p->x;
 873     wxCoord y2 = p->y;
 874     wxCoord cx1 = ( x1 + x2 ) / 2;
 875     wxCoord cy1 = ( y1 + y2 ) / 2;
 876
 877     path->MoveToPoint( LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) );
 878     path->AddLineToPoint( LogicalToDeviceX( cx1 ) , LogicalToDeviceY( cy1 ) );
 879 #if !wxUSE_STL
 880
 881     while ((node = node->GetNext()) != NULL)
 882 #else
 883
 884     while ((node = node->GetNext()))
 885 #endif // !wxUSE_STL
 886
 887     {
 888         p = (wxPoint *)node->GetData();
 889         x1 = x2;
 890         y1 = y2;
 891         x2 = p->x;
 892         y2 = p->y;
 893         wxCoord cx4 = (x1 + x2) / 2;
 894         wxCoord cy4 = (y1 + y2) / 2;
 895
 896         path->AddQuadCurveToPoint(
 897             LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) ,
 898             LogicalToDeviceX( cx4 ) , LogicalToDeviceY( cy4 ) );
 899
 900         cx1 = cx4;
 901         cy1 = cy4;
 902     }
 903
 904     path->AddLineToPoint( LogicalToDeviceX( x2 ) , LogicalToDeviceY( y2 ) );
 905
 906     m_graphicContext->StrokePath( path );
 907     delete path;
 908 }
 909 #endif // wxUSE_SPLINES
 910
 911 void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
 912                             wxCoord xoffset, wxCoord yoffset,
 913                             int fillStyle )
 914 {
 915     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 916
 917     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 918         return;
 919     if ( m_logicalFunction != wxCOPY )
 920         return;
 921
 922     bool closeIt = false ;
 923     if (points[n-1] != points[0])
 924         closeIt = true ;
 925
 926     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)] ;
 927     for( int i = 0 ; i < n; ++i)
 928     {
 929         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 930         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 931     }
 932     if ( closeIt )
 933         pointsD[n] = pointsD[0];
 934
 935     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle) ;
 936     delete[] pointsD;
 937 }
 938
 939 void wxGCDC::DoDrawPolyPolygon(int n,
 940                                int count[],
 941                                wxPoint points[],
 942                                wxCoord xoffset,
 943                                wxCoord yoffset,
 944                                int fillStyle)
 945 {
 946     wxASSERT(n > 1);
 947     wxGraphicsPath* path = m_graphicContext->CreatePath();
 948
 949     int i = 0 ;
 950     for ( int j = 0 ; j < n ; ++j)
 951     {
 952         wxPoint start = points[i];
 953         path->MoveToPoint(LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset)) ;
 954         ++i;
 955         int l = count[j];
 956         for ( int k = 1 ; k < l ; ++k)
 957         {
 958             path->AddLineToPoint( LogicalToDeviceX(points[i].x+ xoffset), LogicalToDeviceY(points[i].y+ yoffset));
 959             ++i ;
 960         }
 961         // close the polygon
 962         if ( start != points[i-1])
 963             path->AddLineToPoint( LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset));
 964     }
 965     m_graphicContext->DrawPath( path , fillStyle);
 966     delete path;
 967 }
 968
 969 void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 970 {
 971     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 972
 973     if ( m_logicalFunction != wxCOPY )
 974         return;
 975
 976     wxCoord xx = LogicalToDeviceX(x);
 977     wxCoord yy = LogicalToDeviceY(y);
 978     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
 979     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
 980
 981     // CMB: draw nothing if transformed w or h is 0
 982     if (ww == 0 || hh == 0)
 983         return;
 984
 985     // CMB: handle -ve width and/or height
 986     if (ww < 0)
 987     {
 988         ww = -ww;
 989         xx = xx - ww;
 990     }
 991     if (hh < 0)
 992     {
 993         hh = -hh;
 994         yy = yy - hh;
 995     }
 996     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
 997 }
 998
 999 void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
1000                                     wxCoord width, wxCoord height,
1001                                     double radius)
1002 {
1003     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
1004
1005     if ( m_logicalFunction != wxCOPY )
1006         return;
1007
1008     if (radius < 0.0)
1009         radius = - radius * ((width < height) ? width : height);
1010     wxCoord xx = LogicalToDeviceX(x);
1011     wxCoord yy = LogicalToDeviceY(y);
1012     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
1013     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
1014
1015     // CMB: draw nothing if transformed w or h is 0
1016     if (ww == 0 || hh == 0)
1017         return;
1018
1019     // CMB: handle -ve width and/or height
1020     if (ww < 0)
1021     {
1022         ww = -ww;
1023         xx = xx - ww;
1024     }
1025     if (hh < 0)
1026     {
1027         hh = -hh;
1028         yy = yy - hh;
1029     }
1030
1031     m_graphicContext->DrawRoundedRectangle( xx,yy,ww,hh,radius);
1032 }
1033
1034 void wxGCDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
1035 {
1036     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
1037
1038     if ( m_logicalFunction != wxCOPY )
1039         return;
1040
1041     wxCoord xx = LogicalToDeviceX(x);
1042     wxCoord yy = LogicalToDeviceY(y);
1043     wxDouble ww = m_signX * LogicalToDeviceXRel(width);
1044     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
1045
1046     // CMB: draw nothing if transformed w or h is 0
1047     if (ww == 0 || hh == 0)
1048         return;
1049
1050     // CMB: handle -ve width and/or height
1051     if (ww < 0)
1052     {
1053         ww = -ww;
1054         xx = xx - ww;
1055     }
1056     if (hh < 0)
1057     {
1058         hh = -hh;
1059         yy = yy - hh;
1060     }
1061
1062     m_graphicContext->DrawEllipse(xx,yy,ww,hh);
1063 }
1064
1065 bool wxGCDC::CanDrawBitmap() const
1066 {
1067     return true;
1068 }
1069
1070 bool wxGCDC::DoBlit(
1071     wxCoord WXUNUSED(xdest), wxCoord WXUNUSED(ydest), wxCoord WXUNUSED(width), wxCoord WXUNUSED(height),
1072     wxDC *source, wxCoord WXUNUSED(xsrc), wxCoord WXUNUSED(ysrc), int logical_func , bool WXUNUSED(useMask),
1073     wxCoord WXUNUSED(xsrcMask), wxCoord WXUNUSED(ysrcMask) )
1074 {
1075     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid DC") );
1076     wxCHECK_MSG( source->Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid source DC") );
1077
1078     if ( logical_func == wxNO_OP )
1079         return true;
1080
1081 #if 0
1082     if (xsrcMask == -1 && ysrcMask == -1)
1083     {
1084         xsrcMask = xsrc;
1085         ysrcMask = ysrc;
1086     }
1087
1088     wxCoord yysrc = source-> LogicalToDeviceY(ysrc);
1089     wxCoord xxsrc = source-> LogicalToDeviceX(xsrc);
1090     wxCoord wwsrc = source-> LogicalToDeviceXRel(width);
1091     wxCoord hhsrc = source-> LogicalToDeviceYRel(height);
1092
1093     wxCoord yydest = LogicalToDeviceY(ydest);
1094     wxCoord xxdest = LogicalToDeviceX(xdest);
1095     wxCoord wwdest = LogicalToDeviceXRel(width);
1096     wxCoord hhdest = LogicalToDeviceYRel(height);
1097
1098     wxMemoryDC* memdc = dynamic_cast<wxMemoryDC*>(source);
1099     if ( memdc && logical_func == wxCOPY )
1100     {
1101         wxBitmap blit = memdc->GetSelectedObject();
1102
1103         wxASSERT_MSG( blit.Ok() , wxT("Invalid bitmap for blitting") );
1104
1105         wxCoord bmpwidth = blit.GetWidth();
1106         wxCoord bmpheight = blit.GetHeight();
1107
1108         if ( xxsrc != 0 || yysrc != 0 || bmpwidth != wwsrc || bmpheight != hhsrc )
1109         {
1110             wwsrc = wxMin( wwsrc , bmpwidth - xxsrc );
1111             hhsrc = wxMin( hhsrc , bmpheight - yysrc );
1112             if ( wwsrc > 0 && hhsrc > 0 )
1113             {
1114                 if ( xxsrc >= 0 && yysrc >= 0 )
1115                 {
1116                     wxRect subrect( xxsrc, yysrc, wwsrc , hhsrc );
1117                     // TODO we perhaps could add a DrawSubBitmap call to dc for performance reasons
1118                     blit = blit.GetSubBitmap( subrect );
1119                 }
1120                 else
1121                 {
1122                     // in this case we'd probably have to adjust the different coordinates, but
1123                     // we have to find out proper contract first
1124                     blit = wxNullBitmap;
1125                 }
1126             }
1127             else
1128             {
1129                 blit = wxNullBitmap;
1130             }
1131         }
1132
1133         if ( blit.Ok() )
1134         {
1135             m_graphicContext->DrawBitmap( blit, xxdest , yydest , wwdest , hhdest );
1136         }
1137
1138     }
1139     else
1140     {
1141         wxFAIL_MSG( wxT("Blitting is only supported from bitmap contexts") );
1142         return false;
1143     }
1144 #endif
1145
1146     return false;
1147 }
1148
1149 void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
1150                                double angle)
1151 {
1152     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1153
1154     if ( str.length() == 0 )
1155         return;
1156     if ( m_logicalFunction != wxCOPY )
1157         return;
1158
1159     int drawX = LogicalToDeviceX(x);
1160     int drawY = LogicalToDeviceY(y);
1161
1162     m_graphicContext->DrawText( str, drawX ,drawY , DegToRad(angle ));
1163 }
1164
1165 void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
1166 {
1167     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1168
1169     if ( str.length() == 0 )
1170         return;
1171     if ( m_logicalFunction != wxCOPY )
1172         return;
1173
1174     int drawX = LogicalToDeviceX(x);
1175     int drawY = LogicalToDeviceY(y);
1176
1177     m_graphicContext->DrawText( str, drawX ,drawY);
1178 }
1179
1180 bool wxGCDC::CanGetTextExtent() const
1181 {
1182     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
1183
1184     return true;
1185 }
1186
1187 void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
1188                               wxCoord *descent, wxCoord *externalLeading ,
1189                               wxFont *theFont ) const
1190 {
1191     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
1192
1193     if ( theFont )
1194     {
1195         m_graphicContext->SetFont( *theFont );
1196     }
1197
1198     wxDouble h , d , e , w;
1199
1200     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
1201
1202     if ( height )
1203         *height = DeviceToLogicalYRel( h );
1204     if ( descent )
1205         *descent =DeviceToLogicalYRel( d);
1206     if ( externalLeading )
1207         *externalLeading = DeviceToLogicalYRel( e);
1208     if ( width )
1209         *width = DeviceToLogicalXRel( w );
1210
1211     if ( theFont )
1212     {
1213         m_graphicContext->SetFont( m_font );
1214     }
1215 }
1216
1217 bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
1218 {
1219     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
1220     widths.Clear();
1221     widths.Add(0,text.Length());
1222     if ( text.IsEmpty() )
1223         return true ;
1224
1225     wxArrayDouble widthsD ;
1226
1227     m_graphicContext->GetPartialTextExtents( text, widthsD );
1228     for ( size_t i = 0; i < widths.GetCount(); ++i )
1229         widths[i] = DeviceToLogicalXRel( widthsD[i] + 0.5 ) ;
1230
1231     return true;
1232 }
1233
1234 wxCoord wxGCDC::GetCharWidth(void) const
1235 {
1236     wxCoord width;
1237     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
1238
1239     return width;
1240 }
1241
1242 wxCoord wxGCDC::GetCharHeight(void) const
1243 {
1244     wxCoord height;
1245     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
1246
1247     return height;
1248 }
1249
1250 void wxGCDC::Clear(void)
1251 {
1252     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::Clear - invalid DC") );
1253     // TODO
1254 }
1255
1256 void wxGCDC::DoGetSize(int *width, int *height) const
1257 {
1258     *width = 1000;
1259     *height = 1000;
1260 }
1261
1262 void wxGCDC::DoGradientFillLinear(const wxRect& rect,
1263                                   const wxColour& initialColour,
1264                                   const wxColour& destColour,
1265                                   wxDirection nDirection )
1266 {
1267     wxPoint start ;
1268     wxPoint end ;
1269     switch( nDirection)
1270     {
1271     case wxWEST :
1272         start = rect.GetRightBottom();
1273         start.x++;
1274         end = rect.GetLeftBottom();
1275         break ;
1276     case wxEAST :
1277         start = rect.GetLeftBottom();
1278         end = rect.GetRightBottom();
1279         end.x++;
1280         break ;
1281     case wxNORTH :
1282         start = rect.GetLeftBottom();
1283         start.y++;
1284         end = rect.GetLeftTop();
1285         break ;
1286     case wxSOUTH :
1287         start = rect.GetLeftTop();
1288         end = rect.GetLeftBottom();
1289         end.y++;
1290         break ;
1291     }
1292
1293     m_graphicContext->SetLinearGradientBrush(
1294         LogicalToDeviceX(start.x),LogicalToDeviceY(start.y),
1295         LogicalToDeviceX(end.x),LogicalToDeviceY(end.y), initialColour, destColour);
1296
1297     wxCoord xx = LogicalToDeviceX(rect.x);
1298     wxCoord yy = LogicalToDeviceY(rect.y);
1299     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1300     wxCoord hh = m_signY * LogicalToDeviceYRel(rect.height);
1301
1302     if (ww == 0 || hh == 0)
1303         return;
1304
1305     if (ww < 0)
1306     {
1307         ww = -ww;
1308         xx = xx - ww;
1309     }
1310     if (hh < 0)
1311     {
1312         hh = -hh;
1313         yy = yy - hh;
1314     }
1315
1316     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1317     m_graphicContext->DrawRectangle(xx,yy,ww,hh);
1318     m_graphicContext->SetPen(m_pen);
1319 }
1320
1321 void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
1322                                       const wxColour& initialColour,
1323                                       const wxColour& destColour,
1324                                       const wxPoint& circleCenter)
1325 {
1326     //Radius
1327     wxInt32 cx = rect.GetWidth() / 2;
1328     wxInt32 cy = rect.GetHeight() / 2;
1329     wxInt32 nRadius;
1330     if (cx < cy)
1331         nRadius = cx;
1332     else
1333         nRadius = cy;
1334
1335     wxCoord xx = LogicalToDeviceX(rect.x);
1336     wxCoord yy = LogicalToDeviceY(rect.y);
1337     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1338     wxCoord hh = m_signY * LogicalToDeviceYRel(rect.height);
1339
1340     if (ww == 0 || hh == 0)
1341         return;
1342
1343     if (ww < 0)
1344     {
1345         ww = -ww;
1346         xx = xx - ww;
1347     }
1348     if (hh < 0)
1349     {
1350         hh = -hh;
1351         yy = yy - hh;
1352     }
1353
1354     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1355     m_graphicContext->SetBrush( wxBrush( destColour) ) ;
1356     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1357
1358     m_graphicContext->SetRadialGradientBrush(
1359         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1360         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1361         LogicalToDeviceXRel(nRadius),
1362         initialColour,destColour);
1363
1364     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1365     m_graphicContext->SetPen(m_pen);
1366 }
1367
1368 void wxGCDC::DoDrawCheckMark(wxCoord x, wxCoord y,
1369                              wxCoord width, wxCoord height)
1370 {
1371     wxDCBase::DoDrawCheckMark(x,y,width,height);
1372 }
1373
1374 #endif // wxUSE_GRAPHICS_CONTEXT