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 x, wxCoord y, wxCoord width, wxCoord height )
 343 {
 344     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegion - invalid DC") );
 345
 346     wxCoord xx, yy, ww, hh;
 347     xx = LogicalToDeviceX(x);
 348     yy = LogicalToDeviceY(y);
 349     ww = LogicalToDeviceXRel(width);
 350     hh = LogicalToDeviceYRel(height);
 351
 352     m_graphicContext->Clip( xx, yy, ww, hh );
 353     if ( m_clipping )
 354     {
 355         m_clipX1 = wxMax( m_clipX1, xx );
 356         m_clipY1 = wxMax( m_clipY1, yy );
 357         m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 358         m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 359     }
 360     else
 361     {
 362         m_clipping = true;
 363
 364         m_clipX1 = xx;
 365         m_clipY1 = yy;
 366         m_clipX2 = xx + ww;
 367         m_clipY2 = yy + hh;
 368     }
 369 }
 370
 371 void wxGCDC::DoSetClippingRegionAsRegion( const wxRegion &region )
 372 {
 373     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoSetClippingRegionAsRegion - invalid DC") );
 374
 375     if (region.Empty())
 376     {
 377         DestroyClippingRegion();
 378         return;
 379     }
 380
 381     wxCoord x, y, w, h;
 382     region.GetBox( x, y, w, h );
 383     wxCoord xx, yy, ww, hh;
 384     xx = LogicalToDeviceX(x);
 385     yy = LogicalToDeviceY(y);
 386     ww = LogicalToDeviceXRel(w);
 387     hh = LogicalToDeviceYRel(h);
 388
 389     // if we have a scaling that we cannot map onto native regions
 390     // we must use the box
 391     if ( ww != w || hh != h )
 392     {
 393         wxGCDC::DoSetClippingRegion( x, y, w, h );
 394     }
 395     else
 396     {
 397         m_graphicContext->Clip( region );
 398         if ( m_clipping )
 399         {
 400             m_clipX1 = wxMax( m_clipX1, xx );
 401             m_clipY1 = wxMax( m_clipY1, yy );
 402             m_clipX2 = wxMin( m_clipX2, (xx + ww) );
 403             m_clipY2 = wxMin( m_clipY2, (yy + hh) );
 404         }
 405         else
 406         {
 407             m_clipping = true;
 408
 409             m_clipX1 = xx;
 410             m_clipY1 = yy;
 411             m_clipX2 = xx + ww;
 412             m_clipY2 = yy + hh;
 413         }
 414     }
 415 }
 416
 417 void wxGCDC::DestroyClippingRegion()
 418 {
 419     m_graphicContext->ResetClip();
 420     m_graphicContext->SetPen( m_pen );
 421     m_graphicContext->SetBrush( m_brush );
 422
 423     m_clipping = false;
 424 }
 425
 426 void wxGCDC::DoGetSizeMM( int* width, int* height ) const
 427 {
 428     int w = 0, h = 0;
 429
 430     GetSize( &w, &h );
 431     if (width)
 432         *width = long( double(w) / (m_scaleX * m_mm_to_pix_x) );
 433     if (height)
 434         *height = long( double(h) / (m_scaleY * m_mm_to_pix_y) );
 435 }
 436
 437 void wxGCDC::SetTextForeground( const wxColour &col )
 438 {
 439     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextForeground - invalid DC") );
 440
 441     if ( col != m_textForegroundColour )
 442     {
 443         m_textForegroundColour = col;
 444         m_graphicContext->SetTextColor( col );
 445     }
 446 }
 447
 448 void wxGCDC::SetTextBackground( const wxColour &col )
 449 {
 450     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::SetTextBackground - invalid DC") );
 451
 452     m_textBackgroundColour = col;
 453 }
 454
 455 void wxGCDC::SetMapMode( int mode )
 456 {
 457     switch (mode)
 458     {
 459     case wxMM_TWIPS:
 460         SetLogicalScale( twips2mm * m_mm_to_pix_x, twips2mm * m_mm_to_pix_y );
 461         break;
 462
 463     case wxMM_POINTS:
 464         SetLogicalScale( pt2mm * m_mm_to_pix_x, pt2mm * m_mm_to_pix_y );
 465         break;
 466
 467     case wxMM_METRIC:
 468         SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 469         break;
 470
 471     case wxMM_LOMETRIC:
 472         SetLogicalScale( m_mm_to_pix_x / 10.0, m_mm_to_pix_y / 10.0 );
 473         break;
 474
 475     case wxMM_TEXT:
 476     default:
 477         SetLogicalScale( 1.0, 1.0 );
 478         break;
 479     }
 480
 481     ComputeScaleAndOrigin();
 482 }
 483
 484 void wxGCDC::SetUserScale( double x, double y )
 485 {
 486     // allow negative ? -> no
 487
 488     m_userScaleX = x;
 489     m_userScaleY = y;
 490     ComputeScaleAndOrigin();
 491 }
 492
 493 void wxGCDC::SetLogicalScale( double x, double y )
 494 {
 495     // allow negative ?
 496     m_logicalScaleX = x;
 497     m_logicalScaleY = y;
 498     ComputeScaleAndOrigin();
 499 }
 500
 501 void wxGCDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 502 {
 503     m_logicalOriginX = x * m_signX;   // is this still correct ?
 504     m_logicalOriginY = y * m_signY;
 505     ComputeScaleAndOrigin();
 506 }
 507
 508 void wxGCDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 509 {
 510     m_deviceOriginX = x;
 511     m_deviceOriginY = y;
 512     ComputeScaleAndOrigin();
 513 }
 514
 515 void wxGCDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 516 {
 517     m_signX = (xLeftRight ?  1 : -1);
 518     m_signY = (yBottomUp ? -1 :  1);
 519     ComputeScaleAndOrigin();
 520 }
 521
 522 wxSize wxGCDC::GetPPI() const
 523 {
 524     return wxSize(72, 72);
 525 }
 526
 527 int wxGCDC::GetDepth() const
 528 {
 529     return 32;
 530 }
 531
 532 void wxGCDC::ComputeScaleAndOrigin()
 533 {
 534     // CMB: copy scale to see if it changes
 535     double origScaleX = m_scaleX;
 536     double origScaleY = m_scaleY;
 537     m_scaleX = m_logicalScaleX * m_userScaleX;
 538     m_scaleY = m_logicalScaleY * m_userScaleY;
 539     m_deviceOriginX = m_deviceOriginX + m_logicalOriginX;
 540     m_deviceOriginY = m_deviceOriginY + m_logicalOriginY;
 541
 542     // CMB: if scale has changed call SetPen to recalulate the line width
 543     if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 544     {
 545         // this is a bit artificial, but we need to force wxDC to think
 546         // the pen has changed
 547         wxPen pen(GetPen());
 548         m_pen = wxNullPen;
 549         SetPen(pen);
 550         SetFont(m_font);
 551     }
 552 }
 553
 554 void wxGCDC::SetPalette( const wxPalette& WXUNUSED(palette) )
 555 {
 556
 557 }
 558
 559 void wxGCDC::SetBackgroundMode( int mode )
 560 {
 561     m_backgroundMode = mode;
 562 }
 563
 564 void wxGCDC::SetFont( const wxFont &font )
 565 {
 566     m_font = font;
 567     if ( m_graphicContext )
 568     {
 569         wxFont f = font;
 570         if ( f.Ok() )
 571             f.SetPointSize( LogicalToDeviceYRel(font.GetPointSize()));
 572         m_graphicContext->SetFont( f );
 573     }
 574 }
 575
 576 void wxGCDC::SetPen( const wxPen &pen )
 577 {
 578     if ( m_pen == pen )
 579         return;
 580
 581     m_pen = pen;
 582     if ( m_graphicContext )
 583     {
 584         if ( m_pen.GetStyle() == wxSOLID || m_pen.GetStyle() == wxTRANSPARENT )
 585         {
 586             m_graphicContext->SetPen( m_pen );
 587         }
 588         else
 589         {
 590             // we have to compensate for moved device origins etc. otherwise patterned pens are standing still
 591             // eg when using a wxScrollWindow and scrolling around
 592             int origX = LogicalToDeviceX( 0 );
 593             int origY = LogicalToDeviceY( 0 );
 594             m_graphicContext->Translate( origX , origY );
 595             m_graphicContext->SetPen( m_pen );
 596             m_graphicContext->Translate( -origX , -origY );
 597         }
 598     }
 599 }
 600
 601 void wxGCDC::SetBrush( const wxBrush &brush )
 602 {
 603     if (m_brush == brush)
 604         return;
 605
 606     m_brush = brush;
 607     if ( m_graphicContext )
 608     {
 609         if ( brush.GetStyle() == wxSOLID || brush.GetStyle() == wxTRANSPARENT )
 610         {
 611             m_graphicContext->SetBrush( m_brush );
 612         }
 613         else
 614         {
 615             // we have to compensate for moved device origins etc. otherwise patterned brushes are standing still
 616             // eg when using a wxScrollWindow and scrolling around
 617             // TODO on MSW / GDIPlus this still occurs with hatched brushes
 618             int origX = LogicalToDeviceX(0);
 619             int origY = LogicalToDeviceY(0);
 620             m_graphicContext->Translate( origX , origY );
 621             m_graphicContext->SetBrush( m_brush );
 622             m_graphicContext->Translate( -origX , -origY );
 623         }
 624     }
 625 }
 626
 627 void wxGCDC::SetBackground( const wxBrush &brush )
 628 {
 629     if (m_backgroundBrush == brush)
 630         return;
 631
 632     m_backgroundBrush = brush;
 633     if (!m_backgroundBrush.Ok())
 634         return;
 635 }
 636
 637 void wxGCDC::SetLogicalFunction( int function )
 638 {
 639     if (m_logicalFunction == function)
 640         return;
 641
 642     m_logicalFunction = function;
 643 #if wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 644
 645     CGContextRef cgContext = ((wxCairoContext*)(m_graphicContext))->GetNativeContext();
 646     if ( m_logicalFunction == wxCOPY )
 647         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 648     else if ( m_logicalFunction == wxINVERT )
 649         CGContextSetBlendMode( cgContext, kCGBlendModeExclusion );
 650     else
 651         CGContextSetBlendMode( cgContext, kCGBlendModeNormal );
 652 #endif
 653
 654 }
 655
 656 bool wxGCDC::DoFloodFill(wxCoord WXUNUSED(x), wxCoord WXUNUSED(y),
 657                          const wxColour& WXUNUSED(col), int WXUNUSED(style))
 658 {
 659     return false;
 660 }
 661
 662 bool wxGCDC::DoGetPixel( wxCoord WXUNUSED(x), wxCoord WXUNUSED(y), wxColour *WXUNUSED(col) ) const
 663 {
 664     //  wxCHECK_MSG( 0 , false, wxT("wxGCDC(cg)::DoGetPixel - not implemented") );
 665     return false;
 666 }
 667
 668 void wxGCDC::DoDrawLine( wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2 )
 669 {
 670     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLine - invalid DC") );
 671
 672 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 673
 674     if ( m_logicalFunction != wxCOPY )
 675         return;
 676 #endif
 677
 678     wxCoord xx1 = LogicalToDeviceX(x1);
 679     wxCoord yy1 = LogicalToDeviceY(y1);
 680     wxCoord xx2 = LogicalToDeviceX(x2);
 681     wxCoord yy2 = LogicalToDeviceY(y2);
 682
 683     m_graphicContext->StrokeLine(xx1,yy1,xx2,yy2);
 684
 685     CalcBoundingBox(x1, y1);
 686     CalcBoundingBox(x2, y2);
 687 }
 688
 689 void wxGCDC::DoCrossHair( wxCoord x, wxCoord y )
 690 {
 691     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoCrossHair - invalid DC") );
 692
 693     if ( m_logicalFunction != wxCOPY )
 694         return;
 695
 696     int w = 0, h = 0;
 697
 698     GetSize( &w, &h );
 699
 700     wxCoord xx = LogicalToDeviceX(x);
 701     wxCoord yy = LogicalToDeviceY(y);
 702     wxCoord xw = LogicalToDeviceX(w);
 703     wxCoord x0 = LogicalToDeviceX(0);
 704     wxCoord y0 = LogicalToDeviceY(0);
 705     wxCoord yh = LogicalToDeviceY(h);
 706
 707     m_graphicContext->StrokeLine(x0,yy,xw,yy);
 708     m_graphicContext->StrokeLine(xx,y0,xx,yh);
 709
 710     CalcBoundingBox(x0, y0);
 711     CalcBoundingBox(x0+xw, y0+yh);
 712 }
 713
 714 void wxGCDC::DoDrawArc( wxCoord x1, wxCoord y1,
 715                         wxCoord x2, wxCoord y2,
 716                         wxCoord xc, wxCoord yc )
 717 {
 718     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawArc - invalid DC") );
 719
 720     if ( m_logicalFunction != wxCOPY )
 721         return;
 722
 723     wxCoord xx1 = LogicalToDeviceX(x1);
 724     wxCoord yy1 = LogicalToDeviceY(y1);
 725     wxCoord xx2 = LogicalToDeviceX(x2);
 726     wxCoord yy2 = LogicalToDeviceY(y2);
 727     wxCoord xxc = LogicalToDeviceX(xc);
 728     wxCoord yyc = LogicalToDeviceY(yc);
 729
 730     double dx = xx1 - xxc;
 731     double dy = yy1 - yyc;
 732     double radius = sqrt((double)(dx * dx + dy * dy));
 733     wxCoord rad = (wxCoord)radius;
 734     double sa, ea;
 735     if (xx1 == xx2 && yy1 == yy2)
 736     {
 737         sa = 0.0;
 738         ea = 360.0;
 739     }
 740     else if (radius == 0.0)
 741     {
 742         sa = ea = 0.0;
 743     }
 744     else
 745     {
 746         sa = (xx1 - xxc == 0) ?
 747      (yy1 - yyc < 0) ? 90.0 : -90.0 :
 748              -atan2(double(yy1 - yyc), double(xx1 - xxc)) * RAD2DEG;
 749         ea = (xx2 - xxc == 0) ?
 750      (yy2 - yyc < 0) ? 90.0 : -90.0 :
 751              -atan2(double(yy2 - yyc), double(xx2 - xxc)) * RAD2DEG;
 752     }
 753
 754     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 755
 756     wxGraphicsPath* path = m_graphicContext->CreatePath();
 757     if ( fill && ((x1!=x2)||(y1!=y2)) )
 758         path->MoveToPoint( xxc, yyc );
 759     path->AddArc( xxc, yyc , rad , DegToRad(sa) , DegToRad(ea), false );
 760     if ( fill && ((x1!=x2)||(y1!=y2)) )
 761         path->AddLineToPoint( xxc, yyc );
 762     m_graphicContext->DrawPath(path);
 763     delete path;
 764 }
 765
 766 void wxGCDC::DoDrawEllipticArc( wxCoord x, wxCoord y, wxCoord w, wxCoord h,
 767                                 double sa, double ea )
 768 {
 769     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipticArc - invalid DC") );
 770
 771     if ( m_logicalFunction != wxCOPY )
 772         return;
 773
 774     wxCoord xx = LogicalToDeviceX(x);
 775     wxCoord yy = LogicalToDeviceY(y);
 776     wxCoord ww = m_signX * LogicalToDeviceXRel(w);
 777     wxCoord hh = m_signY * LogicalToDeviceYRel(h);
 778
 779     // handle -ve width and/or height
 780     if (ww < 0)
 781     {
 782         ww = -ww;
 783         xx = xx - ww;
 784     }
 785     if (hh < 0)
 786     {
 787         hh = -hh;
 788         yy = yy - hh;
 789     }
 790
 791     bool fill = m_brush.GetStyle() != wxTRANSPARENT;
 792
 793     wxGraphicsPath* path = m_graphicContext->CreatePath();
 794     m_graphicContext->PushState();
 795     m_graphicContext->Translate(xx+ww/2,yy+hh/2);
 796     wxDouble factor = ((wxDouble) ww) / hh;
 797     m_graphicContext->Scale( factor , 1.0);
 798     if ( fill && (sa!=ea) )
 799         path->MoveToPoint(0,0);
 800     // since these angles (ea,sa) are measured counter-clockwise, we invert them to
 801     // get clockwise angles
 802     path->AddArc( 0, 0, hh/2 , DegToRad(-sa) , DegToRad(-ea), sa > ea );
 803     if ( fill && (sa!=ea) )
 804         path->AddLineToPoint(0,0);
 805     m_graphicContext->DrawPath( path );
 806     m_graphicContext->PopState();
 807     delete path;
 808 }
 809
 810 void wxGCDC::DoDrawPoint( wxCoord x, wxCoord y )
 811 {
 812     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPoint - invalid DC") );
 813
 814     DoDrawLine( x , y , x + 1 , y + 1 );
 815 }
 816
 817 void wxGCDC::DoDrawLines(int n, wxPoint points[],
 818                          wxCoord xoffset, wxCoord yoffset)
 819 {
 820     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawLines - invalid DC") );
 821
 822 #if !wxMAC_USE_CORE_GRAPHICS_BLEND_MODES
 823
 824     if ( m_logicalFunction != wxCOPY )
 825         return;
 826 #endif
 827
 828     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n];
 829     for( int i = 0; i < n; ++i)
 830     {
 831         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 832         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 833     }
 834
 835     m_graphicContext->StrokeLines( n , pointsD);
 836     delete[] pointsD;
 837 }
 838
 839 #if wxUSE_SPLINES
 840 void wxGCDC::DoDrawSpline(wxList *points)
 841 {
 842     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawSpline - invalid DC") );
 843
 844     if ( m_logicalFunction != wxCOPY )
 845         return;
 846
 847     wxGraphicsPath* path = m_graphicContext->CreatePath();
 848
 849     wxList::compatibility_iterator node = points->GetFirst();
 850     if (node == wxList::compatibility_iterator())
 851         // empty list
 852         return;
 853
 854     wxPoint *p = (wxPoint *)node->GetData();
 855
 856     wxCoord x1 = p->x;
 857     wxCoord y1 = p->y;
 858
 859     node = node->GetNext();
 860     p = (wxPoint *)node->GetData();
 861
 862     wxCoord x2 = p->x;
 863     wxCoord y2 = p->y;
 864     wxCoord cx1 = ( x1 + x2 ) / 2;
 865     wxCoord cy1 = ( y1 + y2 ) / 2;
 866
 867     path->MoveToPoint( LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) );
 868     path->AddLineToPoint( LogicalToDeviceX( cx1 ) , LogicalToDeviceY( cy1 ) );
 869 #if !wxUSE_STL
 870
 871     while ((node = node->GetNext()) != NULL)
 872 #else
 873
 874     while ((node = node->GetNext()))
 875 #endif // !wxUSE_STL
 876
 877     {
 878         p = (wxPoint *)node->GetData();
 879         x1 = x2;
 880         y1 = y2;
 881         x2 = p->x;
 882         y2 = p->y;
 883         wxCoord cx4 = (x1 + x2) / 2;
 884         wxCoord cy4 = (y1 + y2) / 2;
 885
 886         path->AddQuadCurveToPoint(
 887             LogicalToDeviceX( x1 ) , LogicalToDeviceY( y1 ) ,
 888             LogicalToDeviceX( cx4 ) , LogicalToDeviceY( cy4 ) );
 889
 890         cx1 = cx4;
 891         cy1 = cy4;
 892     }
 893
 894     path->AddLineToPoint( LogicalToDeviceX( x2 ) , LogicalToDeviceY( y2 ) );
 895
 896     m_graphicContext->StrokePath( path );
 897     delete path;
 898 }
 899 #endif // wxUSE_SPLINES
 900
 901 void wxGCDC::DoDrawPolygon( int n, wxPoint points[],
 902                             wxCoord xoffset, wxCoord yoffset,
 903                             int fillStyle )
 904 {
 905     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawPolygon - invalid DC") );
 906
 907     if ( n <= 0 || (m_brush.GetStyle() == wxTRANSPARENT && m_pen.GetStyle() == wxTRANSPARENT ) )
 908         return;
 909     if ( m_logicalFunction != wxCOPY )
 910         return;
 911
 912     bool closeIt = false;
 913     if (points[n-1] != points[0])
 914         closeIt = true;
 915
 916     wxPoint2DDouble* pointsD = new wxPoint2DDouble[n+(closeIt?1:0)];
 917     for( int i = 0; i < n; ++i)
 918     {
 919         pointsD[i].m_x = LogicalToDeviceX(points[i].x + xoffset);
 920         pointsD[i].m_y = LogicalToDeviceY(points[i].y + yoffset);
 921     }
 922     if ( closeIt )
 923         pointsD[n] = pointsD[0];
 924
 925     m_graphicContext->DrawLines( n+(closeIt?1:0) , pointsD, fillStyle);
 926     delete[] pointsD;
 927 }
 928
 929 void wxGCDC::DoDrawPolyPolygon(int n,
 930                                int count[],
 931                                wxPoint points[],
 932                                wxCoord xoffset,
 933                                wxCoord yoffset,
 934                                int fillStyle)
 935 {
 936     wxASSERT(n > 1);
 937     wxGraphicsPath* path = m_graphicContext->CreatePath();
 938
 939     int i = 0;
 940     for ( int j = 0; j < n; ++j)
 941     {
 942         wxPoint start = points[i];
 943         path->MoveToPoint(LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset));
 944         ++i;
 945         int l = count[j];
 946         for ( int k = 1; k < l; ++k)
 947         {
 948             path->AddLineToPoint( LogicalToDeviceX(points[i].x+ xoffset), LogicalToDeviceY(points[i].y+ yoffset));
 949             ++i;
 950         }
 951         // close the polygon
 952         if ( start != points[i-1])
 953             path->AddLineToPoint( LogicalToDeviceX(start.x+ xoffset), LogicalToDeviceY(start.y+ yoffset));
 954     }
 955     m_graphicContext->DrawPath( path , fillStyle);
 956     delete path;
 957 }
 958
 959 void wxGCDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 960 {
 961     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRectangle - invalid DC") );
 962
 963     if ( m_logicalFunction != wxCOPY )
 964         return;
 965
 966     wxCoord xx = LogicalToDeviceX(x);
 967     wxCoord yy = LogicalToDeviceY(y);
 968     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
 969     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
 970
 971     // CMB: draw nothing if transformed w or h is 0
 972     if (ww == 0 || hh == 0)
 973         return;
 974
 975     // CMB: handle -ve width and/or height
 976     if (ww < 0)
 977     {
 978         ww = -ww;
 979         xx = xx - ww;
 980     }
 981     if (hh < 0)
 982     {
 983         hh = -hh;
 984         yy = yy - hh;
 985     }
 986     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
 987 }
 988
 989 void wxGCDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y,
 990                                     wxCoord width, wxCoord height,
 991                                     double radius)
 992 {
 993     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRoundedRectangle - invalid DC") );
 994
 995     if ( m_logicalFunction != wxCOPY )
 996         return;
 997
 998     if (radius < 0.0)
 999         radius = - radius * ((width < height) ? width : height);
1000     wxCoord xx = LogicalToDeviceX(x);
1001     wxCoord yy = LogicalToDeviceY(y);
1002     wxCoord ww = m_signX * LogicalToDeviceXRel(width);
1003     wxCoord hh = m_signY * LogicalToDeviceYRel(height);
1004
1005     // CMB: draw nothing if transformed w or h is 0
1006     if (ww == 0 || hh == 0)
1007         return;
1008
1009     // CMB: handle -ve width and/or height
1010     if (ww < 0)
1011     {
1012         ww = -ww;
1013         xx = xx - ww;
1014     }
1015     if (hh < 0)
1016     {
1017         hh = -hh;
1018         yy = yy - hh;
1019     }
1020
1021     m_graphicContext->DrawRoundedRectangle( xx,yy,ww,hh,radius);
1022 }
1023
1024 void wxGCDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
1025 {
1026     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawEllipse - invalid DC") );
1027
1028     if ( m_logicalFunction != wxCOPY )
1029         return;
1030
1031     wxDouble xx = LogicalToDeviceX(x);
1032     wxDouble yy = LogicalToDeviceY(y);
1033     wxDouble ww = m_signX * LogicalToDeviceXRel(width);
1034     wxDouble hh = m_signY * LogicalToDeviceYRel(height);
1035
1036     // CMB: draw nothing if transformed w or h is 0
1037     if (ww == 0 || hh == 0)
1038         return;
1039
1040     // CMB: handle -ve width and/or height
1041     if (ww < 0)
1042     {
1043         ww = -ww;
1044         xx = xx - ww;
1045     }
1046     if (hh < 0)
1047     {
1048         hh = -hh;
1049         yy = yy - hh;
1050     }
1051
1052     m_graphicContext->DrawEllipse(xx,yy,ww,hh);
1053 }
1054
1055 bool wxGCDC::CanDrawBitmap() const
1056 {
1057     return true;
1058 }
1059
1060 bool wxGCDC::DoBlit(
1061     wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height,
1062     wxDC *source, wxCoord xsrc, wxCoord ysrc, int logical_func , bool WXUNUSED(useMask),
1063     wxCoord xsrcMask, wxCoord ysrcMask )
1064 {
1065     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid DC") );
1066     wxCHECK_MSG( source->Ok(), false, wxT("wxGCDC(cg)::DoBlit - invalid source DC") );
1067
1068     if ( logical_func == wxNO_OP )
1069         return true;
1070
1071     if (xsrcMask == -1 && ysrcMask == -1)
1072     {
1073         xsrcMask = xsrc;
1074         ysrcMask = ysrc;
1075     }
1076
1077     wxCoord yysrc = source-> LogicalToDeviceY(ysrc);
1078     wxCoord xxsrc = source-> LogicalToDeviceX(xsrc);
1079     wxCoord wwsrc = source-> LogicalToDeviceXRel(width);
1080     wxCoord hhsrc = source-> LogicalToDeviceYRel(height);
1081
1082     wxCoord yydest = LogicalToDeviceY(ydest);
1083     wxCoord xxdest = LogicalToDeviceX(xdest);
1084     wxCoord wwdest = LogicalToDeviceXRel(width);
1085     wxCoord hhdest = LogicalToDeviceYRel(height);
1086
1087     wxMemoryDC* memdc = dynamic_cast<wxMemoryDC*>(source);
1088     if ( memdc && logical_func == wxCOPY )
1089     {
1090         wxBitmap blit = memdc->GetSelectedBitmap();
1091
1092         wxASSERT_MSG( blit.Ok() , wxT("Invalid bitmap for blitting") );
1093
1094         wxCoord bmpwidth = blit.GetWidth();
1095         wxCoord bmpheight = blit.GetHeight();
1096
1097         if ( xxsrc != 0 || yysrc != 0 || bmpwidth != wwsrc || bmpheight != hhsrc )
1098         {
1099             wwsrc = wxMin( wwsrc , bmpwidth - xxsrc );
1100             hhsrc = wxMin( hhsrc , bmpheight - yysrc );
1101             if ( wwsrc > 0 && hhsrc > 0 )
1102             {
1103                 if ( xxsrc >= 0 && yysrc >= 0 )
1104                 {
1105                     wxRect subrect( xxsrc, yysrc, wwsrc , hhsrc );
1106                     // TODO we perhaps could add a DrawSubBitmap call to dc for performance reasons
1107                     blit = blit.GetSubBitmap( subrect );
1108                 }
1109                 else
1110                 {
1111                     // in this case we'd probably have to adjust the different coordinates, but
1112                     // we have to find out proper contract first
1113                     blit = wxNullBitmap;
1114                 }
1115             }
1116             else
1117             {
1118                 blit = wxNullBitmap;
1119             }
1120         }
1121
1122         if ( blit.Ok() )
1123         {
1124             m_graphicContext->DrawBitmap( blit, xxdest , yydest , wwdest , hhdest );
1125         }
1126     }
1127     else
1128     {
1129         wxFAIL_MSG( wxT("Blitting is only supported from bitmap contexts") );
1130         return false;
1131     }
1132
1133     return true;
1134 }
1135
1136 void wxGCDC::DoDrawRotatedText(const wxString& str, wxCoord x, wxCoord y,
1137                                double angle)
1138 {
1139     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1140
1141     if ( str.length() == 0 )
1142         return;
1143     if ( m_logicalFunction != wxCOPY )
1144         return;
1145
1146     int drawX = LogicalToDeviceX(x);
1147     int drawY = LogicalToDeviceY(y);
1148
1149     m_graphicContext->DrawText( str, drawX ,drawY , DegToRad(angle ));
1150 }
1151
1152 void wxGCDC::DoDrawText(const wxString& str, wxCoord x, wxCoord y)
1153 {
1154     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoDrawRotatedText - invalid DC") );
1155
1156     if ( str.length() == 0 )
1157         return;
1158     if ( m_logicalFunction != wxCOPY )
1159         return;
1160
1161     int drawX = LogicalToDeviceX(x);
1162     int drawY = LogicalToDeviceY(y);
1163
1164     m_graphicContext->DrawText( str, drawX ,drawY);
1165 }
1166
1167 bool wxGCDC::CanGetTextExtent() const
1168 {
1169     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::CanGetTextExtent - invalid DC") );
1170
1171     return true;
1172 }
1173
1174 void wxGCDC::DoGetTextExtent( const wxString &str, wxCoord *width, wxCoord *height,
1175                               wxCoord *descent, wxCoord *externalLeading ,
1176                               wxFont *theFont ) const
1177 {
1178     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::DoGetTextExtent - invalid DC") );
1179
1180     if ( theFont )
1181     {
1182         m_graphicContext->SetFont( *theFont );
1183     }
1184
1185     wxDouble h , d , e , w;
1186
1187     m_graphicContext->GetTextExtent( str, &w, &h, &d, &e );
1188
1189     if ( height )
1190         *height = DeviceToLogicalYRel((wxCoord)h);
1191     if ( descent )
1192         *descent = DeviceToLogicalYRel((wxCoord)d);
1193     if ( externalLeading )
1194         *externalLeading = DeviceToLogicalYRel((wxCoord)e);
1195     if ( width )
1196         *width = DeviceToLogicalXRel((wxCoord)w);
1197
1198     if ( theFont )
1199     {
1200         m_graphicContext->SetFont( m_font );
1201     }
1202 }
1203
1204 bool wxGCDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
1205 {
1206     wxCHECK_MSG( Ok(), false, wxT("wxGCDC(cg)::DoGetPartialTextExtents - invalid DC") );
1207     widths.Clear();
1208     widths.Add(0,text.Length());
1209     if ( text.IsEmpty() )
1210         return true;
1211
1212     wxArrayDouble widthsD;
1213
1214     m_graphicContext->GetPartialTextExtents( text, widthsD );
1215     for ( size_t i = 0; i < widths.GetCount(); ++i )
1216         widths[i] = DeviceToLogicalXRel((wxCoord)(widthsD[i] + 0.5));
1217
1218     return true;
1219 }
1220
1221 wxCoord wxGCDC::GetCharWidth(void) const
1222 {
1223     wxCoord width;
1224     DoGetTextExtent( wxT("g") , &width , NULL , NULL , NULL , NULL );
1225
1226     return width;
1227 }
1228
1229 wxCoord wxGCDC::GetCharHeight(void) const
1230 {
1231     wxCoord height;
1232     DoGetTextExtent( wxT("g") , NULL , &height , NULL , NULL , NULL );
1233
1234     return height;
1235 }
1236
1237 void wxGCDC::Clear(void)
1238 {
1239     wxCHECK_RET( Ok(), wxT("wxGCDC(cg)::Clear - invalid DC") );
1240     // TODO better implementation / incorporate size info into wxGCDC or context
1241     m_graphicContext->SetBrush( m_backgroundBrush );
1242     wxPen p = *wxTRANSPARENT_PEN;
1243     m_graphicContext->SetPen( p );
1244     DoDrawRectangle( 0, 0, 32000 , 32000 );
1245     m_graphicContext->SetPen( m_pen );
1246     m_graphicContext->SetBrush( m_brush );
1247 }
1248
1249 void wxGCDC::DoGetSize(int *width, int *height) const
1250 {
1251     *width = 1000;
1252     *height = 1000;
1253 }
1254
1255 void wxGCDC::DoGradientFillLinear(const wxRect& rect,
1256                                   const wxColour& initialColour,
1257                                   const wxColour& destColour,
1258                                   wxDirection nDirection )
1259 {
1260     wxPoint start;
1261     wxPoint end;
1262     switch( nDirection)
1263     {
1264     case wxWEST :
1265         start = rect.GetRightBottom();
1266         start.x++;
1267         end = rect.GetLeftBottom();
1268         break;
1269     case wxEAST :
1270         start = rect.GetLeftBottom();
1271         end = rect.GetRightBottom();
1272         end.x++;
1273         break;
1274     case wxNORTH :
1275         start = rect.GetLeftBottom();
1276         start.y++;
1277         end = rect.GetLeftTop();
1278         break;
1279     case wxSOUTH :
1280         start = rect.GetLeftTop();
1281         end = rect.GetLeftBottom();
1282         end.y++;
1283         break;
1284     default :
1285         break;
1286     }
1287
1288     m_graphicContext->SetLinearGradientBrush(
1289         LogicalToDeviceX(start.x),LogicalToDeviceY(start.y),
1290         LogicalToDeviceX(end.x),LogicalToDeviceY(end.y), initialColour, destColour);
1291
1292     wxDouble xx = LogicalToDeviceX(rect.x);
1293     wxDouble yy = LogicalToDeviceY(rect.y);
1294     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1295     wxDouble hh = m_signY * LogicalToDeviceYRel(rect.height);
1296
1297     if (ww == 0 || hh == 0)
1298         return;
1299
1300     if (ww < 0)
1301     {
1302         ww = -ww;
1303         xx = xx - ww;
1304     }
1305     if (hh < 0)
1306     {
1307         hh = -hh;
1308         yy = yy - hh;
1309     }
1310
1311     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1312     m_graphicContext->DrawRectangle(xx,yy,ww,hh);
1313     m_graphicContext->SetPen(m_pen);
1314 }
1315
1316 void wxGCDC::DoGradientFillConcentric(const wxRect& rect,
1317                                       const wxColour& initialColour,
1318                                       const wxColour& destColour,
1319                                       const wxPoint& circleCenter)
1320 {
1321     //Radius
1322     wxInt32 cx = rect.GetWidth() / 2;
1323     wxInt32 cy = rect.GetHeight() / 2;
1324     wxInt32 nRadius;
1325     if (cx < cy)
1326         nRadius = cx;
1327     else
1328         nRadius = cy;
1329
1330     wxDouble xx = LogicalToDeviceX(rect.x);
1331     wxDouble yy = LogicalToDeviceY(rect.y);
1332     wxDouble ww = m_signX * LogicalToDeviceXRel(rect.width);
1333     wxDouble hh = m_signY * LogicalToDeviceYRel(rect.height);
1334
1335     if (ww == 0 || hh == 0)
1336         return;
1337
1338     if (ww < 0)
1339     {
1340         ww = -ww;
1341         xx = xx - ww;
1342     }
1343     if (hh < 0)
1344     {
1345         hh = -hh;
1346         yy = yy - hh;
1347     }
1348
1349     m_graphicContext->SetPen(*wxTRANSPARENT_PEN);
1350     m_graphicContext->SetBrush( wxBrush( destColour) );
1351     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1352
1353     m_graphicContext->SetRadialGradientBrush(
1354         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1355         xx+LogicalToDeviceX(circleCenter.x),yy+LogicalToDeviceY(circleCenter.y),
1356         LogicalToDeviceXRel(nRadius),
1357         initialColour,destColour);
1358
1359     m_graphicContext->DrawRectangle( xx,yy,ww,hh);
1360     m_graphicContext->SetPen(m_pen);
1361 }
1362
1363 void wxGCDC::DoDrawCheckMark(wxCoord x, wxCoord y,
1364                              wxCoord width, wxCoord height)
1365 {
1366     wxDCBase::DoDrawCheckMark(x,y,width,height);
1367 }
1368
1369 #endif // wxUSE_GRAPHICS_CONTEXT