contrib/src/canvas/canvas.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        canvas.cpp
   3 // Author:      Robert Roebling
   4 // Created:     XX/XX/XX
   5 // Copyright:   2000 (c) Robert Roebling
   6 // Licence:     wxWindows Licence
   7 /////////////////////////////////////////////////////////////////////////////
   8
   9 #ifdef __GNUG__
  10     #pragma implementation "canvas.cpp"
  11 #endif
  12
  13 // For compilers that support precompilation, includes "wx/wx.h".
  14 #include "wx/wxprec.h"
  15
  16 #ifdef __BORLANDC__
  17     #pragma hdrstop
  18 #endif
  19
  20 #include "wx/canvas/canvas.h"
  21
  22 #ifdef __WXGTK__
  23     #include <gtk/gtk.h>
  24     #include <gdk/gdkrgb.h>
  25     #include "wx/gtk/win_gtk.h"
  26 #endif
  27
  28 #ifndef wxUSE_FREETYPE
  29     #define wxUSE_FREETYPE 1
  30 #endif
  31
  32 #if wxUSE_FREETYPE
  33     #include <freetype/freetype.h>
  34 #endif
  35
  36 //----------------------------------------------------------------------------
  37 // globals
  38 //----------------------------------------------------------------------------
  39
  40 #if wxUSE_FREETYPE
  41 FT_Library g_freetypeLibrary;
  42 #endif
  43
  44 //----------------------------------------------------------------------------
  45 // wxCanvasObject
  46 //----------------------------------------------------------------------------
  47
  48 wxCanvasObject::wxCanvasObject()
  49 {
  50     m_owner = NULL;
  51     m_area.x = -1;
  52     m_area.y = -1;
  53     m_area.width = -1;
  54     m_area.height = -1;
  55     m_isControl = FALSE;
  56     m_isVector = FALSE;
  57     m_isImage = FALSE;
  58 }
  59
  60 void wxCanvasObject::SetArea( int x, int y, int width, int height )
  61 {
  62     m_area.x = x;
  63     m_area.y = y;
  64     m_area.width = width;
  65     m_area.height = height;
  66 }
  67
  68 void wxCanvasObject::SetArea( wxRect rect )
  69 {
  70     m_area.x = rect.x;
  71     m_area.y = rect.y;
  72     m_area.width = rect.width;
  73     m_area.height = rect.height;
  74 }
  75
  76 void wxCanvasObject::Move( int x, int y )
  77 {
  78     int old_x = m_area.x;
  79     int old_y = m_area.y;
  80
  81     m_area.x = x;
  82     m_area.y = y;
  83
  84     if (!m_isControl)
  85     {
  86         // TODO: sometimes faster to merge into 1 Update or
  87         // to break up into four
  88         m_owner->Update( old_x, old_y, m_area.width, m_area.height );
  89         m_owner->Update( x, y, m_area.width, m_area.height );
  90     }
  91 }
  92
  93 bool wxCanvasObject::IsHit( int x, int y, int margin )
  94 {
  95     return ((x >= m_area.x-margin) &&
  96             (x <= m_area.x+m_area.width+margin) &&
  97             (y >= m_area.y-margin) &&
  98             (y <= m_area.y+m_area.height+margin));
  99 }
 100
 101 void wxCanvasObject::CaptureMouse()
 102 {
 103     m_owner->SetCaptureMouse( this );
 104 }
 105
 106 void wxCanvasObject::ReleaseMouse()
 107 {
 108     m_owner->SetCaptureMouse( NULL );
 109 }
 110
 111 bool wxCanvasObject::IsCapturedMouse()
 112 {
 113     return m_owner->m_captureMouse==this;
 114 }
 115
 116
 117 void wxCanvasObject::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 118 {
 119 }
 120
 121 void wxCanvasObject::Recreate()
 122 {
 123 }
 124
 125 void wxCanvasObject::WriteSVG( wxTextOutputStream &stream )
 126 {
 127 }
 128
 129 //----------------------------------------------------------------------------
 130 // wxCanvasObjectGroup
 131 //----------------------------------------------------------------------------
 132
 133 wxCanvasObjectGroup::wxCanvasObjectGroup()
 134 {
 135     m_validbounds = FALSE;
 136 }
 137
 138 wxCanvasObjectGroup::~wxCanvasObjectGroup()
 139 {
 140 }
 141
 142 void wxCanvasObjectGroup::SetOwner(wxCanvas* canvas)
 143 {
 144     m_owner=canvas;
 145     wxNode *node = m_objects.First();
 146     while (node)
 147     {
 148         wxCanvasObject *obj = (wxCanvasObject*) node->Data();
 149
 150         obj->SetOwner(canvas);
 151
 152         node = node->Next();
 153     }
 154 }
 155
 156 void wxCanvasObjectGroup::ExtendArea(double x, double y)
 157 {
 158     if (m_validbounds)
 159     {
 160         if (x < m_minx) m_minx = x;
 161         if (y < m_miny) m_miny = y;
 162         if (x > m_maxx) m_maxx = x;
 163         if (y > m_maxy) m_maxy = y;
 164     }
 165     else
 166     {
 167         m_validbounds = TRUE;
 168
 169         m_minx = x;
 170         m_miny = y;
 171         m_maxx = x;
 172         m_maxy = y;
 173     }
 174 }
 175
 176 void wxCanvasObjectGroup::DeleteContents( bool flag)
 177 {
 178     m_objects.DeleteContents( flag );
 179     m_validbounds = FALSE;
 180 }
 181
 182 void wxCanvasObjectGroup::Prepend( wxCanvasObject* obj )
 183 {
 184     m_objects.Insert( obj );
 185     m_validbounds = FALSE;
 186 }
 187
 188 void wxCanvasObjectGroup::Append( wxCanvasObject* obj )
 189 {
 190     m_objects.Append( obj );
 191     m_validbounds = FALSE;
 192 }
 193
 194 void wxCanvasObjectGroup::Insert( size_t before, wxCanvasObject* obj )
 195 {
 196     m_objects.Insert( before, obj );
 197     m_validbounds = FALSE;
 198 }
 199
 200 void wxCanvasObjectGroup::Remove( wxCanvasObject* obj )
 201 {
 202     m_objects.DeleteObject( obj );
 203     m_validbounds = FALSE;
 204 }
 205
 206 void wxCanvasObjectGroup::Recreate()
 207 {
 208     m_validbounds = FALSE;
 209     wxNode *node = m_objects.First();
 210     while (node)
 211     {
 212         wxCanvasObject *obj = (wxCanvasObject*) node->Data();
 213
 214         obj->Recreate();
 215         ExtendArea(obj->GetX(),obj->GetY());
 216         ExtendArea(obj->GetX()+obj->GetWidth(),obj->GetY()+obj->GetHeight());
 217
 218         node = node->Next();
 219     }
 220 }
 221
 222 void wxCanvasObjectGroup::Render(int xabs, int yabs, int x, int y, int width, int height )
 223 {
 224     // cycle through all objects
 225     wxNode *node = m_objects.First();
 226     while (node)
 227     {
 228         wxCanvasObject *obj = (wxCanvasObject*) node->Data();
 229
 230         if (!obj->IsControl())
 231         {
 232             // If we have 10.000 objects, we will go through
 233             // this 10.000 times for each update, so we have
 234             // to optimise carefully.
 235             int clip_x = xabs + obj->GetX();
 236             int clip_width = obj->GetWidth();
 237             if (clip_x < x)
 238             {
 239                 clip_width -= x-clip_x;
 240                 clip_x = x;
 241             }
 242             if (clip_width > 0)
 243             {
 244                 if (clip_x + clip_width > x + width)
 245                     clip_width = x+width-clip_x;
 246
 247                 if (clip_width > 0)
 248                 {
 249                     int clip_y = yabs + obj->GetY();
 250                     int clip_height = obj->GetHeight();
 251                     if (clip_y < y)
 252                     {
 253                         clip_height -= y-clip_y;
 254                         clip_y = y;
 255                     }
 256                     if (clip_height > 0)
 257                     {
 258                         if (clip_y + clip_height > y + height)
 259                             clip_height = y+height-clip_y;
 260
 261                         if (clip_height > 0)
 262                             obj->Render(xabs,yabs, clip_x, clip_y, clip_width, clip_height );
 263                     }
 264                 }
 265             }
 266         }
 267
 268         node = node->Next();
 269     }
 270 }
 271
 272 void wxCanvasObjectGroup::WriteSVG( wxTextOutputStream &stream )
 273 {
 274 }
 275
 276 bool wxCanvasObjectGroup::IsHit( int x, int y, int margin )
 277 {
 278     wxNode *node = m_objects.Last();
 279     while (node)
 280     {
 281         wxCanvasObject *obj = (wxCanvasObject*) node->Data();
 282
 283         if (!obj->IsControl())
 284         {
 285             if (obj->IsHit(x,y,margin))
 286             {
 287                 return TRUE;
 288             }
 289         }
 290         node = node->Previous();
 291     }
 292     return FALSE;
 293 }
 294
 295 wxCanvasObject* wxCanvasObjectGroup::IsHitObject( int x, int y, int margin )
 296 {
 297     wxCanvasObject *obj=0;
 298     wxNode *node = m_objects.Last();
 299     while (node)
 300     {
 301         obj=(wxCanvasObject*) node->Data();
 302
 303         if (!obj->IsControl())
 304         {
 305             if (obj->IsHit(x,y,margin))
 306             {
 307                 return obj;
 308             }
 309         }
 310         node = node->Previous();
 311     }
 312
 313     return (wxCanvasObject*) NULL;
 314 }
 315
 316 //----------------------------------------------------------------------------
 317 // wxCanvasObjectGroupRef
 318 //----------------------------------------------------------------------------
 319
 320 wxCanvasObjectGroupRef::wxCanvasObjectGroupRef(double x, double y, wxCanvasObjectGroup* group)
 321    : wxCanvasObject()
 322 {
 323     m_x = x;
 324     m_y = y;
 325     m_validbounds = FALSE;
 326     m_group = group;
 327 }
 328
 329 void wxCanvasObjectGroupRef::SetOwner(wxCanvas* canvas)
 330 {
 331     m_owner = canvas;
 332     m_group->SetOwner(canvas);
 333 }
 334
 335 void wxCanvasObjectGroupRef::ExtendArea(double x, double y)
 336 {
 337     if (m_validbounds)
 338     {
 339         if (x < m_minx) m_minx = x;
 340         if (y < m_miny) m_miny = y;
 341         if (x > m_maxx) m_maxx = x;
 342         if (y > m_maxy) m_maxy = y;
 343     }
 344     else
 345     {
 346         m_validbounds = TRUE;
 347
 348         m_minx = x;
 349         m_miny = y;
 350         m_maxx = x;
 351         m_maxy = y;
 352     }
 353 }
 354
 355 void wxCanvasObjectGroupRef::Recreate()
 356 {
 357     m_validbounds = FALSE;
 358     m_group->Recreate();
 359     ExtendArea(m_group->GetXMin(),m_group->GetYMin());
 360     ExtendArea(m_group->GetXMax(),m_group->GetYMax());
 361
 362     //set the area in pixels relative to the parent
 363     SetArea( m_owner->GetDeviceX( m_x + m_minx ),
 364              m_owner->GetDeviceY( m_y + m_miny ),
 365              m_owner->GetDeviceWidth( m_maxx-m_minx ),
 366              m_owner->GetDeviceHeight( m_maxy-m_miny ) );
 367 }
 368
 369 void wxCanvasObjectGroupRef::Render(int xabs, int yabs, int x, int y, int width, int height )
 370 {
 371     xabs += m_owner->GetDeviceX(m_x);
 372     yabs += m_owner->GetDeviceY(m_y);
 373
 374     int clip_x = xabs + m_group->GetXMin();
 375     int clip_width = m_group->GetXMax()-m_group->GetXMin();
 376     if (clip_x < x)
 377     {
 378         clip_width -= x-clip_x;
 379         clip_x = x;
 380     }
 381     if (clip_width > 0)
 382     {
 383         if (clip_x + clip_width > x + width)
 384             clip_width = x+width-clip_x;
 385
 386         if (clip_width > 0)
 387         {
 388             int clip_y = yabs + m_group->GetYMin();
 389             int clip_height = m_group->GetYMax()-m_group->GetYMin();
 390             if (clip_y < y)
 391             {
 392                 clip_height -= y-clip_y;
 393                 clip_y = y;
 394             }
 395             if (clip_height > 0)
 396             {
 397                 if (clip_y + clip_height > y + height)
 398                     clip_height = y+height-clip_y;
 399
 400                 if (clip_height > 0)
 401                     m_group->Render(xabs,yabs, clip_x, clip_y, clip_width, clip_height );
 402             }
 403         }
 404     }
 405 }
 406
 407 void wxCanvasObjectGroupRef::WriteSVG( wxTextOutputStream &stream )
 408 {
 409 }
 410
 411 bool wxCanvasObjectGroupRef::IsHit( int x, int y, int margin )
 412 {
 413     return m_group->IsHit(x-GetPosX(),y-GetPosY(),margin);
 414 }
 415
 416 wxCanvasObject* wxCanvasObjectGroupRef::IsHitObject( int x, int y, int margin )
 417 {
 418     return m_group->IsHitObject(x-GetPosX(),y-GetPosY(),margin);
 419 }
 420
 421 void wxCanvasObjectGroupRef::Move( int x, int y )
 422 {
 423     m_x = x;
 424     m_y = y;
 425
 426     int old_area_x = m_area.x;
 427     int old_area_y = m_area.y;
 428
 429     m_area.x=m_owner->GetDeviceX(  m_x + m_minx );
 430     m_area.y=m_owner->GetDeviceY(  m_y + m_miny );
 431
 432         int leftu,rightu,bottomu,topu ;
 433         leftu   = wxMin (m_area.x, old_area_x ) ;
 434         rightu  = wxMax (old_area_x + m_area.width, m_area.x + m_area.width) ;
 435         topu    = wxMin (m_area.y,old_area_y) ;
 436         bottomu = wxMax (old_area_y + m_area.height, m_area.y + m_area.height) ;
 437
 438     if ( rightu - leftu < 2*m_area.width && bottomu - topu < 2*m_area.height )
 439     {
 440         m_owner->Update(leftu,topu,rightu - leftu,bottomu - topu);
 441     }
 442     else
 443     {
 444         m_owner->Update(old_area_x, old_area_y, m_area.width, m_area.height );
 445         m_owner->Update( m_area.x, m_area.y, m_area.width, m_area.height );
 446     }
 447 }
 448
 449 //----------------------------------------------------------------------------
 450 // wxCanvasPolyline
 451 //----------------------------------------------------------------------------
 452
 453 wxCanvasPolyline::wxCanvasPolyline( int n,  wxPoint2DDouble points[])
 454    : wxCanvasObject()
 455 {
 456     m_n = n;
 457     m_points = points;
 458     m_pen = *wxBLACK_PEN;
 459 }
 460
 461 wxCanvasPolyline::~wxCanvasPolyline()
 462 {
 463     delete m_points;
 464 }
 465
 466 void wxCanvasPolyline::ExtendArea(double x, double y)
 467 {
 468     if (m_validbounds)
 469     {
 470         if (x < m_minx) m_minx = x;
 471         if (y < m_miny) m_miny = y;
 472         if (x > m_maxx) m_maxx = x;
 473         if (y > m_maxy) m_maxy = y;
 474     }
 475     else
 476     {
 477         m_validbounds = TRUE;
 478
 479         m_minx = x;
 480         m_miny = y;
 481         m_maxx = x;
 482         m_maxy = y;
 483     }
 484 }
 485
 486 void wxCanvasPolyline::Recreate()
 487 {
 488
 489     m_validbounds=FALSE;
 490     int i;
 491     for (i=0; i < m_n;i++)
 492     {
 493         ExtendArea(m_points[i].m_x,m_points[i].m_y);
 494     }
 495
 496     //include the pen width also
 497     ExtendArea(m_minx -m_pen.GetWidth(),m_miny-m_pen.GetWidth());
 498     ExtendArea(m_maxx+m_pen.GetWidth()*2,m_maxy+m_pen.GetWidth()*2);
 499
 500     //set the area in pixels relative to the parent
 501     SetArea( m_owner->GetDeviceX(m_minx ),
 502              m_owner->GetDeviceY(m_miny ),
 503              m_owner->GetDeviceWidth( m_maxx-m_minx ),
 504              m_owner->GetDeviceHeight( m_maxy-m_miny ) );
 505 }
 506
 507 void wxCanvasPolyline::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 508 {
 509     int buffer_x = m_owner->GetBufferX();
 510     int buffer_y = m_owner->GetBufferY();
 511
 512     int start_y = clip_y - buffer_y;
 513     int end_y = clip_y+clip_height - buffer_y;
 514
 515     int start_x = clip_x - buffer_x;
 516     int end_x = clip_x+clip_width - buffer_x;
 517
 518 #if IMAGE_CANVAS
 519 #else
 520     wxPoint *cpoints = new wxPoint[m_n];
 521     int i;
 522     for (i = 0; i < m_n; i++)
 523     {
 524         cpoints[i].x = m_owner->GetDeviceX(m_points[i].m_x+xabs);
 525         cpoints[i].y = m_owner->GetDeviceY(m_points[i].m_y+yabs);
 526     }
 527     wxMemoryDC *dc = m_owner->GetDC();
 528     dc->SetClippingRegion(start_x,start_y,end_x-start_x,end_y-start_y);
 529     dc->SetPen(m_pen);
 530     dc->DrawLines(m_n, cpoints, 0,0);
 531     delete [] cpoints;
 532     dc->SetPen(wxNullPen);
 533     dc->DestroyClippingRegion();
 534 #endif
 535 }
 536
 537 void wxCanvasPolyline::WriteSVG( wxTextOutputStream &stream )
 538 {
 539 }
 540
 541 //----------------------------------------------------------------------------
 542 // wxCanvasPolygon
 543 //----------------------------------------------------------------------------
 544
 545 wxCanvasPolygon::wxCanvasPolygon( int n, wxPoint2DDouble points[])
 546    : wxCanvasObject()
 547 {
 548     m_n = n;
 549     m_points = points;
 550     m_brush = *wxBLACK_BRUSH;
 551     m_pen = *wxTRANSPARENT_PEN;
 552 }
 553
 554 wxCanvasPolygon::~wxCanvasPolygon()
 555 {
 556     delete m_points;
 557 }
 558
 559 void wxCanvasPolygon::ExtendArea(double x, double y)
 560 {
 561     if (m_validbounds)
 562     {
 563         if (x < m_minx) m_minx = x;
 564         if (y < m_miny) m_miny = y;
 565         if (x > m_maxx) m_maxx = x;
 566         if (y > m_maxy) m_maxy = y;
 567     }
 568     else
 569     {
 570         m_validbounds = TRUE;
 571
 572         m_minx = x;
 573         m_miny = y;
 574         m_maxx = x;
 575         m_maxy = y;
 576     }
 577 }
 578
 579 void wxCanvasPolygon::Recreate()
 580 {
 581
 582     m_validbounds=FALSE;
 583     int i;
 584     for (i=0; i < m_n;i++)
 585     {
 586         ExtendArea(m_points[i].m_x,m_points[i].m_y);
 587     }
 588
 589     //include the pen width also
 590     ExtendArea(m_minx -m_pen.GetWidth(),m_miny-m_pen.GetWidth());
 591     ExtendArea(m_maxx+m_pen.GetWidth()*2,m_maxy+m_pen.GetWidth()*2);
 592
 593     //set the area in pixels relative to the parent
 594     SetArea( m_owner->GetDeviceX( m_minx ),
 595              m_owner->GetDeviceY( m_miny ),
 596              m_owner->GetDeviceWidth( m_maxx-m_minx ),
 597              m_owner->GetDeviceHeight( m_maxy-m_miny ) );
 598 }
 599
 600 void wxCanvasPolygon::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 601 {
 602     int buffer_x = m_owner->GetBufferX();
 603     int buffer_y = m_owner->GetBufferY();
 604
 605     int start_y = clip_y - buffer_y;
 606     int end_y = clip_y+clip_height - buffer_y;
 607
 608     int start_x = clip_x - buffer_x;
 609     int end_x = clip_x+clip_width - buffer_x;
 610
 611 #if IMAGE_CANVAS
 612 #else
 613     wxPoint *cpoints = new wxPoint[m_n];
 614     int i;
 615     for (i = 0; i < m_n; i++)
 616     {
 617         cpoints[i].x = m_owner->GetDeviceX(m_points[i].m_x+xabs);
 618         cpoints[i].y = m_owner->GetDeviceY(m_points[i].m_y+yabs);
 619     }
 620     wxMemoryDC *dc = m_owner->GetDC();
 621     dc->SetClippingRegion(start_x,start_y,end_x-start_x,end_y-start_y);
 622     dc->SetBrush(m_brush);
 623     dc->SetPen(m_pen);
 624     dc->DrawPolygon(m_n, cpoints, 0,0,wxWINDING_RULE);
 625     delete [] cpoints;
 626     dc->SetBrush(wxNullBrush);
 627     dc->SetPen(wxNullPen);
 628     dc->DestroyClippingRegion();
 629 #endif
 630 }
 631
 632 void wxCanvasPolygon::WriteSVG( wxTextOutputStream &stream )
 633 {
 634 }
 635
 636
 637
 638 //----------------------------------------------------------------------------
 639 // wxCanvasRect
 640 //----------------------------------------------------------------------------
 641
 642 wxCanvasRect::wxCanvasRect( double x, double y, double w, double h )
 643    : wxCanvasObject()
 644 {
 645     m_x = x;
 646     m_y = y;
 647     m_width = w;
 648     m_height = h;
 649
 650     m_brush = *wxBLACK_BRUSH;
 651     m_pen = *wxTRANSPARENT_PEN;
 652 }
 653
 654 void wxCanvasRect::Recreate()
 655 {
 656     SetArea( m_owner->GetDeviceX( m_x ),
 657              m_owner->GetDeviceY( m_y ),
 658              m_owner->GetDeviceWidth( m_width ),
 659              m_owner->GetDeviceHeight( m_height ) );
 660 }
 661
 662 void wxCanvasRect::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 663 {
 664     int buffer_x = m_owner->GetBufferX();
 665     int buffer_y = m_owner->GetBufferY();
 666
 667 #if IMAGE_CANVAS
 668     wxImage *image = m_owner->GetBuffer();
 669
 670     int start_y = clip_y - buffer_y;
 671     int end_y = clip_y+clip_height - buffer_y;
 672
 673     int start_x = clip_x - buffer_x;
 674     int end_x = clip_x+clip_width - buffer_x;
 675
 676     // speed up later
 677     for (int y = start_y; y < end_y; y++)
 678         for (int x = start_x; x < end_x; x++)
 679             image->SetRGB( x, y, m_red, m_green, m_blue );
 680 #else
 681     wxMemoryDC *dc = m_owner->GetDC();
 682     dc->SetPen( m_pen );
 683     dc->SetBrush( m_brush );
 684     dc->DrawRectangle( clip_x-buffer_x, clip_y-buffer_y, clip_width, clip_height );
 685 #endif
 686 }
 687
 688 void wxCanvasRect::WriteSVG( wxTextOutputStream &stream )
 689 {
 690 }
 691
 692 //----------------------------------------------------------------------------
 693 // wxCanvasLine
 694 //----------------------------------------------------------------------------
 695
 696 wxCanvasLine::wxCanvasLine( double x1, double y1, double x2, double y2 )
 697    : wxCanvasObject()
 698 {
 699     m_x1 = x1;
 700     m_y1 = y1;
 701     m_x2 = x2;
 702     m_y2 = y2;
 703
 704     m_pen = *wxBLACK_PEN;
 705 }
 706
 707 void wxCanvasLine::Recreate()
 708 {
 709     int x1 = m_owner->GetDeviceX( m_x1 );
 710     int y1 = m_owner->GetDeviceY( m_y1 );
 711     int x2 = m_owner->GetDeviceX( m_x2 );
 712     int y2 = m_owner->GetDeviceY( m_y2 );
 713     if (x1 > x2)
 714     {
 715         int tmp = x1;
 716         x1 = x2;
 717         x2 = tmp;
 718     }
 719     if (y1 > y2)
 720     {
 721         int tmp = y1;
 722         y1 = y2;
 723         y2 = tmp;
 724     }
 725     SetArea( x1, y1, x2-x1+1, y2-y1+1 );
 726 }
 727
 728 void wxCanvasLine::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 729 {
 730     int buffer_x = m_owner->GetBufferX();
 731     int buffer_y = m_owner->GetBufferY();
 732
 733     int x1 = xabs + m_owner->GetDeviceX( m_x1 );
 734     int y1 = yabs + m_owner->GetDeviceY( m_y1 );
 735     int x2 = xabs + m_owner->GetDeviceX( m_x2 );
 736     int y2 = yabs + m_owner->GetDeviceY( m_y2 );
 737
 738 #if IMAGE_CANVAS
 739     wxImage *image = m_owner->GetBuffer();
 740     if ((m_area.width == 0) && (m_area.height == 0))
 741     {
 742         image->SetRGB( m_area.x-buffer_x, m_area.y-buffer_y, m_red, m_green, m_blue );
 743     }
 744     else
 745     {
 746         wxInt32 d, ii, jj, di, ai, si, dj, aj, sj;
 747         di = x1 - x2;
 748         ai = abs(di) << 1;
 749         si = (di < 0)? -1 : 1;
 750         dj = y1 - y2;
 751         aj = abs(dj) << 1;
 752         sj = (dj < 0)? -1 : 1;
 753
 754         ii = x2;
 755         jj = y2;
 756
 757         if (ai > aj)
 758         {
 759             // iterate over i
 760             d = aj - (ai >> 1);
 761
 762             while (ii != x1)
 763             {
 764                 if ((ii >= clip_x) && (ii < clip_x+clip_width) &&
 765                     (jj >= clip_y) && (jj < clip_y+clip_height))
 766                 {
 767                     image->SetRGB( ii-buffer_x, jj-buffer_y, m_red, m_blue, m_green );
 768                 }
 769                 if (d >= 0)
 770                 {
 771                     jj += sj;
 772                     d  -= ai;
 773                 }
 774                 ii += si;
 775                 d  += aj;
 776             }
 777         }
 778         else
 779         {
 780             // iterate over j
 781             d = ai - (aj >> 1);
 782
 783             while (jj != y1)
 784             {
 785                 if ((ii >= clip_x) && (ii < clip_x+clip_width) &&
 786                     (jj >= clip_y) && (jj < clip_y+clip_height))
 787                 {
 788                     image->SetRGB( ii-buffer_x, jj-buffer_y, m_red, m_blue, m_green );
 789                 }
 790                 if (d >= 0)
 791                 {
 792                     ii += si;
 793                     d  -= aj;
 794                 }
 795                 jj += sj;
 796                 d  += ai;
 797             }
 798         }
 799     }
 800 #else
 801     wxMemoryDC *dc = m_owner->GetDC();
 802     dc->SetClippingRegion( clip_x-buffer_x, clip_y-buffer_y, clip_width, clip_height );
 803     dc->SetPen( m_pen );
 804     dc->DrawLine( x1-buffer_x, y1-buffer_y, x2-buffer_x, y2-buffer_y );
 805
 806     dc->DestroyClippingRegion();
 807 #endif
 808 }
 809
 810 void wxCanvasLine::WriteSVG( wxTextOutputStream &stream )
 811 {
 812     // no idea
 813 }
 814
 815 //----------------------------------------------------------------------------
 816 // wxCanvasImage
 817 //----------------------------------------------------------------------------
 818
 819 wxCanvasImage::wxCanvasImage( const wxImage &image, double x, double y, double w, double h )
 820    : wxCanvasObject()
 821 {
 822     m_x = x;
 823     m_y = y;
 824     m_width = w;
 825     m_height = h;
 826
 827     m_image = image;
 828     m_isImage = TRUE;
 829 }
 830
 831 void wxCanvasImage::Recreate()
 832 {
 833     SetArea( m_owner->GetDeviceX( m_x ),
 834              m_owner->GetDeviceY( m_y ),
 835              m_owner->GetDeviceWidth( m_width ),
 836              m_owner->GetDeviceHeight( m_height ) );
 837
 838 #if IMAGE_CANVAS
 839     if ((m_area.width == m_image.GetWidth()) &&
 840         (m_area.width == m_image.GetWidth()))
 841     {
 842         m_tmp = m_image;
 843     }
 844     else
 845     {
 846         m_tmp = m_image.Scale( m_area.width, m_area.height );
 847     }
 848 #else
 849     if ((m_area.width == m_image.GetWidth()) &&
 850         (m_area.width == m_image.GetWidth()))
 851     {
 852         m_tmp = m_image.ConvertToBitmap();
 853     }
 854     else
 855     {
 856         wxImage tmp( m_image.Scale( m_area.width, m_area.height ) );
 857         m_tmp = tmp.ConvertToBitmap();
 858     }
 859 #endif
 860 }
 861
 862 void wxCanvasImage::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
 863 {
 864     int buffer_x = m_owner->GetBufferX();
 865     int buffer_y = m_owner->GetBufferY();
 866
 867 #if IMAGE_CANVAS
 868     if ((clip_x == xabs + m_area.x) &&
 869         (clip_y == yabs + m_area.y) &&
 870         (clip_width == m_area.width) &&
 871         (clip_height == m_area.height))
 872     {
 873         m_owner->GetBuffer()->Paste( m_tmp, clip_x-buffer_x, clip_y-buffer_y );
 874     }
 875     else
 876     {
 877         // local coordinates
 878         int start_x = clip_x - (xabs + m_area.x);
 879         int start_y = clip_y - (yabs + m_area.y);
 880
 881         wxRect rect( start_x, start_y, clip_width, clip_height );
 882         wxImage sub_image( m_tmp.GetSubImage( rect ) );
 883         m_owner->GetBuffer()->Paste( sub_image, clip_x-buffer_x, clip_y-buffer_y );
 884     }
 885 #else
 886     wxMemoryDC *dc = m_owner->GetDC();
 887
 888     if ((clip_x == xabs + m_area.x) &&
 889         (clip_y == yabs + m_area.y) &&
 890         (clip_width == m_area.width) &&
 891         (clip_height == m_area.height))
 892     {
 893         dc->DrawBitmap( m_tmp, clip_x-buffer_x, clip_y-buffer_y, TRUE );
 894     }
 895     else
 896     {
 897         // local coordinates
 898         int start_x = clip_x - (xabs + m_area.x);
 899         int start_y = clip_y - (yabs + m_area.y);
 900
 901         // Clipping region faster ?
 902         wxRect rect( start_x, start_y, clip_width, clip_height );
 903         wxBitmap sub_bitmap( m_tmp.GetSubBitmap( rect ) );
 904         dc->DrawBitmap( sub_bitmap, clip_x-buffer_x, clip_y-buffer_y, TRUE );
 905     }
 906 #endif
 907 }
 908
 909 void wxCanvasImage::WriteSVG( wxTextOutputStream &stream )
 910 {
 911     // no idea
 912 }
 913
 914 //----------------------------------------------------------------------------
 915 // wxCanvasCtrl
 916 //----------------------------------------------------------------------------
 917
 918 wxCanvasControl::wxCanvasControl( wxWindow *control )
 919    : wxCanvasObject()
 920 {
 921     m_isControl = TRUE;
 922     m_control = control;
 923 }
 924
 925 wxCanvasControl::~wxCanvasControl()
 926 {
 927     m_control->Destroy();
 928 }
 929
 930 void wxCanvasControl::Recreate()
 931 {
 932     m_control->GetSize( &m_area.width, &m_area.height );
 933     m_control->GetPosition( &m_area.x, &m_area.y );
 934 }
 935
 936 void wxCanvasControl::Move( int x, int y )
 937 {
 938     m_control->Move( x, y );
 939 }
 940
 941 //----------------------------------------------------------------------------
 942 // wxCanvasText
 943 //----------------------------------------------------------------------------
 944
 945 class wxFaceData
 946 {
 947 public:
 948 #if wxUSE_FREETYPE
 949      FT_Face   m_face;
 950 #else
 951      void     *m_dummy;
 952 #endif
 953 };
 954
 955 wxCanvasText::wxCanvasText( const wxString &text, double x, double y, const wxString &fontFile, int size )
 956    : wxCanvasObject()
 957 {
 958     m_text = text;
 959     m_fontFileName = fontFile;
 960     m_size = size;
 961
 962     m_red = 0;
 963     m_green = 0;
 964     m_blue = 0;
 965
 966     m_alpha = NULL;
 967
 968     m_x = x;
 969     m_y = y;
 970
 971 #if wxUSE_FREETYPE
 972     wxFaceData *data = new wxFaceData;
 973     m_faceData = data;
 974
 975     int error = FT_New_Face( g_freetypeLibrary,
 976                              m_fontFileName,
 977                              0,
 978                              &(data->m_face) );
 979
 980     error = FT_Set_Char_Size( data->m_face,
 981                               0,
 982                               m_size*64,
 983                               96,    // screen dpi
 984                               96 );
 985 #endif
 986 }
 987
 988 wxCanvasText::~wxCanvasText()
 989 {
 990 #if wxUSE_FREETYPE
 991     wxFaceData *data = (wxFaceData*) m_faceData;
 992     delete data;
 993 #endif
 994
 995     if (m_alpha) delete [] m_alpha;
 996 }
 997
 998 void wxCanvasText::SetRGB( unsigned char red, unsigned char green, unsigned char blue )
 999 {
1000     m_red = red;
1001     m_green = green;
1002     m_blue = blue;
1003 }
1004
1005 void wxCanvasText::SetFlag( int flag )
1006 {
1007     m_flag = flag;
1008 }
1009
1010 void wxCanvasText::Render(int xabs, int yabs, int clip_x, int clip_y, int clip_width, int clip_height )
1011 {
1012     if (!m_alpha) return;
1013
1014 #if IMAGE_CANVAS
1015     wxImage *image = m_owner->GetBuffer();
1016     int buffer_x = m_owner->GetBufferX();
1017     int buffer_y = m_owner->GetBufferY();
1018
1019     // local coordinates
1020     int start_x = clip_x - m_area.x;
1021     int end_x = clip_width + start_x;
1022     int start_y = clip_y - m_area.y;
1023     int end_y = clip_height + start_y;
1024
1025     for (int y = start_y; y < end_y; y++)
1026         for (int x = start_x; x < end_x; x++)
1027         {
1028             int alpha = m_alpha[y*m_area.width + x];
1029             if (alpha)
1030             {
1031                 int image_x = m_area.x+x - buffer_x;
1032                 int image_y = m_area.y+y - buffer_y;
1033                 if (alpha == 255)
1034                 {
1035                     image->SetRGB( image_x, image_y, m_red, m_green, m_blue );
1036                     continue;
1037                 }
1038                 int red1 = (m_red * alpha) / 255;
1039                 int green1 = (m_green * alpha) / 255;
1040                 int blue1 = (m_blue * alpha) / 255;
1041
1042                 alpha = 255-alpha;
1043                 int red2 = image->GetRed( image_x, image_y );
1044                 int green2 = image->GetGreen( image_x, image_y );
1045                 int blue2 = image->GetBlue( image_x, image_y );
1046                 red2 = (red2 * alpha) / 255;
1047                 green2 = (green2 * alpha) / 255;
1048                 blue2 = (blue2 * alpha) / 255;
1049
1050                 image->SetRGB( image_x, image_y, red1+red2, green1+green2, blue1+blue2 );
1051             }
1052         }
1053 #endif
1054 }
1055
1056 void wxCanvasText::WriteSVG( wxTextOutputStream &stream )
1057 {
1058 }
1059
1060 void wxCanvasText::Recreate()
1061 {
1062     if (m_alpha) delete [] m_alpha;
1063
1064     m_area.x = m_owner->GetDeviceX( m_x );
1065     m_area.y = m_owner->GetDeviceY( m_y );
1066
1067     m_area.width = 100;  // TODO, calculate length
1068     m_area.height = m_size;
1069     m_alpha = new unsigned char[100*m_size];
1070     memset( m_alpha, 0, m_area.width*m_area.height );
1071
1072 #if wxUSE_FREETYPE
1073     FT_Face face = ((wxFaceData*)m_faceData)->m_face;
1074     FT_GlyphSlot slot = face->glyph;
1075     int pen_x = 0;
1076     int pen_y = m_size;
1077
1078     for (int n = 0; n < (int)m_text.Len(); n++)
1079     {
1080         FT_UInt index = FT_Get_Char_Index( face, m_text[n] );
1081
1082         int error = FT_Load_Glyph( face, index, FT_LOAD_DEFAULT );
1083         if (error) continue;
1084
1085         error = FT_Render_Glyph( face->glyph, ft_render_mode_normal );
1086         if (error) continue;
1087
1088         FT_Bitmap *bitmap = &slot->bitmap;
1089         unsigned char* buffer = bitmap->buffer;
1090         for (int y = 0; y < bitmap->rows; y++)
1091             for (int x = 0; x < bitmap->width; x++)
1092             {
1093                 unsigned char alpha = buffer[ y*bitmap->pitch + x ];
1094                 if (alpha == 0) continue;
1095
1096                 int xx = pen_x + slot->bitmap_left + x;
1097                 int yy = pen_y - slot->bitmap_top + y;
1098                 m_alpha[ yy * m_area.width + xx ] = alpha;
1099             }
1100
1101         pen_x += slot->advance.x >> 6;
1102         pen_y += slot->advance.y >> 6;
1103     }
1104 #endif
1105 }
1106
1107 //----------------------------------------------------------------------------
1108 // wxCanvas
1109 //----------------------------------------------------------------------------
1110
1111 IMPLEMENT_CLASS(wxCanvas,wxScrolledWindow)
1112
1113 BEGIN_EVENT_TABLE(wxCanvas,wxScrolledWindow)
1114     EVT_CHAR( wxCanvas::OnChar )
1115     EVT_PAINT( wxCanvas::OnPaint )
1116     EVT_SIZE( wxCanvas::OnSize )
1117     EVT_IDLE( wxCanvas::OnIdle )
1118     EVT_MOUSE_EVENTS( wxCanvas::OnMouse )
1119     EVT_SET_FOCUS( wxCanvas::OnSetFocus )
1120     EVT_KILL_FOCUS( wxCanvas::OnKillFocus )
1121     EVT_ERASE_BACKGROUND( wxCanvas::OnEraseBackground )
1122 END_EVENT_TABLE()
1123
1124 wxCanvas::wxCanvas( wxWindow *parent, wxWindowID id,
1125     const wxPoint &position, const wxSize& size, long style ) :
1126     wxScrolledWindow( parent, id, position, size, style )
1127 {
1128     m_bufferX = 0;
1129     m_bufferY = 0;
1130     m_needUpdate = FALSE;
1131     m_red = 0;
1132     m_green = 0;
1133     m_blue = 0;
1134     m_lastMouse = (wxCanvasObject*)NULL;
1135     m_captureMouse = (wxCanvasObject*)NULL;
1136     m_frozen = TRUE;
1137     m_oldDeviceX = 0;
1138     m_oldDeviceY = 0;
1139
1140     //root group always at 0,0
1141     m_root = new wxCanvasObjectGroup();
1142     m_root->DeleteContents( TRUE );
1143     m_root->SetOwner(this);
1144 }
1145
1146 wxCanvas::~wxCanvas()
1147 {
1148     wxNode *node = m_updateRects.First();
1149     while (node)
1150     {
1151         wxRect *rect = (wxRect*) node->Data();
1152         delete rect;
1153         m_updateRects.DeleteNode( node );
1154         node = m_updateRects.First();
1155     }
1156 }
1157
1158 void wxCanvas::SetArea( int width, int height )
1159 {
1160     SetScrollbars( 10, 10, width/10, height/10 );
1161 }
1162
1163 void wxCanvas::SetColour( unsigned char red, unsigned char green, unsigned char blue )
1164 {
1165     m_red = red;
1166     m_green = green;
1167     m_blue = blue;
1168
1169     SetBackgroundColour( wxColour( red, green, blue ) );
1170
1171     if (m_frozen) return;
1172
1173 #if IMAGE_CANVAS
1174     unsigned char *data = m_buffer.GetData();
1175
1176     for (int y = 0; y < m_buffer.GetHeight(); y++)
1177         for (int x = 0; x < m_buffer.GetWidth(); x++)
1178         {
1179             data[0] = red;
1180             data++;
1181             data[0] = green;
1182             data++;
1183             data[0] = blue;
1184             data++;
1185         }
1186 #else
1187     wxMemoryDC dc;
1188     dc.SelectObject( m_buffer );
1189     dc.SetPen( *wxTRANSPARENT_PEN );
1190     wxBrush brush( wxColour( red,green,blue), wxSOLID );
1191     dc.SetBrush( brush );
1192     dc.DrawRectangle( 0, 0, m_buffer.GetWidth(), m_buffer.GetHeight() );
1193     dc.SelectObject( wxNullBitmap );
1194 #endif
1195 }
1196
1197 void wxCanvas::SetCaptureMouse( wxCanvasObject *obj )
1198 {
1199     if (obj)
1200     {
1201         wxWindow::CaptureMouse();
1202         m_captureMouse = obj;
1203     }
1204     else
1205     {
1206         wxWindow::ReleaseMouse();
1207         m_captureMouse = NULL;
1208     }
1209 }
1210
1211 void wxCanvas::Freeze()
1212 {
1213     m_frozen = TRUE;
1214 }
1215
1216 void wxCanvas::Thaw()
1217 {
1218     wxNode *node = m_updateRects.First();
1219     while (node)
1220     {
1221         wxRect *rect = (wxRect*) node->Data();
1222         delete rect;
1223         m_updateRects.DeleteNode( node );
1224         node = m_updateRects.First();
1225     }
1226
1227     m_frozen = FALSE;
1228
1229     if (m_buffer.Ok())
1230         Update( m_bufferX, m_bufferY, m_buffer.GetWidth(), m_buffer.GetHeight() );
1231 }
1232
1233 void wxCanvas::Update( int x, int y, int width, int height, bool blit )
1234 {
1235     CalcScrolledPosition( 0, 0, &m_oldDeviceX, &m_oldDeviceY );
1236
1237     if (m_frozen) return;
1238
1239     // clip to buffer
1240     if (x < m_bufferX)
1241     {
1242         width -= m_bufferX-x;
1243         x = m_bufferX;
1244     }
1245     if (width <= 0) return;
1246
1247     if (y < m_bufferY)
1248     {
1249         height -= m_bufferY-y;
1250         y = m_bufferY;
1251     }
1252     if (height <= 0) return;
1253
1254     if (x+width > m_bufferX+m_buffer.GetWidth())
1255     {
1256         width = m_bufferX+m_buffer.GetWidth() - x;
1257     }
1258     if (width <= 0) return;
1259
1260     if (y+height > m_bufferY+m_buffer.GetHeight())
1261     {
1262         height = m_bufferY+m_buffer.GetHeight() - y;
1263     }
1264     if (height <= 0) return;
1265
1266     // update is within the buffer
1267     m_needUpdate = TRUE;
1268
1269     // has to be blitted to screen later
1270     if (blit)
1271     {
1272         m_updateRects.Append(
1273             (wxObject*) new wxRect( x,y,width,height ) );
1274     }
1275
1276 #if IMAGE_CANVAS
1277     // speed up with direct access, maybe add wxImage::Clear(x,y,w,h,r,g,b)
1278     int start_y = y - m_bufferY;
1279     int end_y = y+height - m_bufferY;
1280     int start_x = x - m_bufferX;
1281     int end_x = x+width - m_bufferX;
1282     for (int yy = start_y; yy < end_y; yy++)
1283         for (int xx = start_x; xx < end_x; xx++)
1284             m_buffer.SetRGB( xx, yy, m_red, m_green, m_blue );
1285
1286     m_root->Render(0,0, x, y, width, height );
1287 #else
1288     wxMemoryDC dc;
1289     dc.SelectObject( m_buffer );
1290     dc.SetPen( *wxTRANSPARENT_PEN );
1291     wxBrush brush( wxColour( m_red,m_green,m_blue), wxSOLID );
1292     dc.SetBrush( brush );
1293     dc.DrawRectangle( x-m_bufferX, y-m_bufferY, width, height );
1294
1295     m_renderDC = &dc;
1296     m_root->Render(0,0, x, y, width, height );
1297
1298     dc.SelectObject( wxNullBitmap );
1299 #endif
1300 }
1301
1302 void wxCanvas::BlitBuffer( wxDC &dc )
1303 {
1304     wxNode *node = m_updateRects.First();
1305     while (node)
1306     {
1307         wxRect *rect = (wxRect*) node->Data();
1308
1309         wxRect sub_rect( *rect );
1310         sub_rect.x -= m_bufferX;
1311         sub_rect.y -= m_bufferY;
1312
1313 #if IMAGE_CANVAS
1314
1315         wxImage sub_image( m_buffer.GetSubImage( sub_rect ) );
1316 #ifdef __WXGTK__
1317         int bpp = wxDisplayDepth();
1318         if (bpp > 8)
1319         {
1320             // the init code is doubled in wxImage
1321             static bool s_hasInitialized = FALSE;
1322
1323             if (!s_hasInitialized)
1324             {
1325                 gdk_rgb_init();
1326                 s_hasInitialized = TRUE;
1327             }
1328
1329             gdk_draw_rgb_image( GTK_PIZZA(m_wxwindow)->bin_window,
1330                             m_wxwindow->style->black_gc,
1331                             sub_rect.x, sub_rect.y,
1332                             sub_image.GetWidth(), sub_image.GetHeight(),
1333                             GDK_RGB_DITHER_NONE,
1334                             sub_image.GetData(),
1335                             sub_image.GetWidth()*3 );
1336         }
1337         else
1338         {
1339             wxBitmap bitmap( sub_image.ConvertToBitmap() );
1340             dc.DrawBitmap( bitmap, rect->x, rect->y );
1341         }
1342 #else
1343         wxBitmap bitmap( sub_image.ConvertToBitmap() );
1344         dc.DrawBitmap( bitmap, rect->x, rect->y );
1345 #endif
1346
1347 #else  // IMAGE_CANVAS
1348
1349         // Maybe clipping use SetClipping() is faster than
1350         // getting the subrect first and drawing it then?
1351         wxBitmap sub_bitmap( m_buffer.GetSubBitmap( sub_rect ) );
1352         dc.DrawBitmap( sub_bitmap, rect->x, rect->y );
1353
1354 #endif
1355         delete rect;
1356         m_updateRects.DeleteNode( node );
1357         node = m_updateRects.First();
1358     }
1359
1360     m_needUpdate = FALSE;
1361 }
1362
1363 void wxCanvas::UpdateNow()
1364 {
1365     if (m_frozen) return;
1366
1367     if (!m_needUpdate) return;
1368
1369     wxClientDC dc( this );
1370     PrepareDC( dc );
1371
1372     BlitBuffer( dc );
1373 }
1374
1375 int wxCanvas::GetDeviceX( double x )
1376 {
1377     return (int) x;
1378 }
1379
1380 int wxCanvas::GetDeviceY( double y )
1381 {
1382     return (int) y;
1383 }
1384
1385 int wxCanvas::GetDeviceWidth( double width )
1386 {
1387     return (int) width;
1388 }
1389
1390 int wxCanvas::GetDeviceHeight( double height )
1391 {
1392     return (int) height;
1393 }
1394
1395 void wxCanvas::Recreate()
1396 {
1397     m_root->Recreate();
1398 }
1399
1400 void wxCanvas::Prepend( wxCanvasObject* obj )
1401 {
1402     m_root->Prepend( obj );
1403     obj->SetOwner(this);
1404
1405     m_root->Recreate();
1406
1407     if (!obj->IsControl())
1408         Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
1409 }
1410
1411 void wxCanvas::Append( wxCanvasObject* obj )
1412 {
1413     m_root->Append( obj );
1414     obj->SetOwner(this);
1415
1416     m_root->Recreate();
1417
1418     if (!obj->IsControl())
1419         Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
1420 }
1421
1422 void wxCanvas::Insert( size_t before, wxCanvasObject* obj )
1423 {
1424     m_root->Insert( before, obj );
1425     obj->SetOwner(this);
1426
1427     m_root->Recreate();
1428
1429     if (!obj->IsControl())
1430         Update( obj->GetX(), obj->GetY(), obj->GetWidth(), obj->GetHeight() );
1431 }
1432
1433 void wxCanvas::Remove( wxCanvasObject* obj )
1434 {
1435     int x = obj->GetX();
1436     int y = obj->GetY();
1437     int w = obj->GetWidth();
1438     int h = obj->GetHeight();
1439     bool ic = obj->IsControl();
1440
1441     m_root->Remove( obj );
1442
1443     if (!ic)
1444         Update( x, y, w, h );
1445 }
1446
1447 void wxCanvas::OnPaint(wxPaintEvent &event)
1448 {
1449     wxPaintDC dc(this);
1450     PrepareDC( dc );
1451
1452     if (!m_buffer.Ok()) return;
1453
1454     if (m_frozen) return;
1455
1456     m_needUpdate = TRUE;
1457
1458     wxRegionIterator it( GetUpdateRegion() );
1459     while (it)
1460     {
1461         int x = it.GetX();
1462         int y = it.GetY();
1463
1464         int w = it.GetWidth();
1465         int h = it.GetHeight();
1466
1467         if (x+w > m_buffer.GetWidth())
1468             w = m_buffer.GetWidth() - x;
1469         if (y+h > m_buffer.GetHeight())
1470             h = m_buffer.GetHeight() - y;
1471
1472         if ((w > 0) && (h > 0))
1473         {
1474             CalcUnscrolledPosition( x, y, &x, &y );
1475             m_updateRects.Append( (wxObject*) new wxRect( x, y, w, h ) );
1476         }
1477
1478         it++;
1479     }
1480
1481     BlitBuffer( dc );
1482 }
1483
1484 void wxCanvas::ScrollWindow( int dx, int dy, const wxRect* rect )
1485 {
1486     // If any updates are pending, do them now since they will
1487     // expect the previous m_bufferX and m_bufferY as well as
1488     // the previous device origin values.
1489     wxClientDC dc( this );
1490     dc.SetDeviceOrigin( m_oldDeviceX, m_oldDeviceY );
1491     BlitBuffer( dc );
1492
1493     // The buffer always starts at the top left corner of the
1494     // client area. Indeed, it is the client area.
1495     CalcUnscrolledPosition( 0, 0, &m_bufferX, &m_bufferY );
1496
1497 #if IMAGE_CANVAS
1498     unsigned char* data = m_buffer.GetData();
1499
1500     if (dy != 0)
1501     {
1502         if (dy > 0)
1503         {
1504             unsigned char *source = data;
1505             unsigned char *dest = data + (dy * m_buffer.GetWidth() * 3);
1506             size_t count = (size_t) (m_buffer.GetWidth() * 3 * (m_buffer.GetHeight()-dy));
1507             memmove( dest, source, count );
1508
1509             // We update the new buffer area, but there is no need to
1510             // blit (last param FALSE) since the ensuing paint event will
1511             // do that anyway.
1512             Update( m_bufferX, m_bufferY, m_buffer.GetWidth(), dy, FALSE );
1513         }
1514         else
1515         {
1516             unsigned char *dest = data;
1517             unsigned char *source = data + (-dy * m_buffer.GetWidth() * 3);
1518             size_t count = (size_t) (m_buffer.GetWidth() * 3 * (m_buffer.GetHeight()+dy));
1519             memmove( dest, source, count );
1520
1521             // We update the new buffer area, but there is no need to
1522             // blit (last param FALSE) since the ensuing paint event will
1523             // do that anyway.
1524             Update( m_bufferX, m_bufferY+m_buffer.GetHeight()+dy, m_buffer.GetWidth(), -dy, FALSE );
1525         }
1526     }
1527
1528     if (dx != 0)
1529     {
1530         if (dx > 0)
1531         {
1532             unsigned char *source = data;
1533             for (int y = 0; y < m_buffer.GetHeight(); y++)
1534             {
1535                 unsigned char *dest = source + dx*3;
1536                 memmove( dest, source, (m_buffer.GetWidth()-dx) * 3 );
1537                 source += m_buffer.GetWidth()*3;
1538             }
1539
1540             // We update the new buffer area, but there is no need to
1541             // blit (last param FALSE) since the ensuing paint event will
1542             // do that anyway.
1543             Update( m_bufferX, m_bufferY, dx, m_buffer.GetHeight(), FALSE );
1544         }
1545         else
1546         {
1547             unsigned char *dest = data;
1548             for (int y = 0; y < m_buffer.GetHeight(); y++)
1549             {
1550                 unsigned char *source = dest - dx*3;
1551                 memmove( dest, source, (m_buffer.GetWidth()+dx) * 3 );
1552                 dest += m_buffer.GetWidth()*3;
1553             }
1554
1555             // We update the new buffer area, but there is no need to
1556             // blit (last param FALSE) since the ensuing paint event will
1557             // do that anyway.
1558             Update( m_bufferX+m_buffer.GetWidth()+dx, m_bufferY, -dx, m_buffer.GetHeight(), FALSE );
1559         }
1560     }
1561 #else
1562     // Update everything, TODO: scrolling
1563     Update( m_bufferX, m_bufferY, m_buffer.GetWidth(), m_buffer.GetHeight(), FALSE );
1564 #endif
1565
1566     wxWindow::ScrollWindow( dx, dy, rect );
1567 }
1568
1569 void wxCanvas::OnMouse(wxMouseEvent &event)
1570 {
1571     int x = event.GetX();
1572     int y = event.GetY();
1573     CalcUnscrolledPosition( x, y, &x, &y );
1574
1575     if (event.GetEventType() == wxEVT_MOTION)
1576     {
1577         if (m_captureMouse) //no matter what go to this one
1578         {
1579             wxMouseEvent child_event( wxEVT_MOTION );
1580             child_event.SetEventObject(m_captureMouse);
1581             child_event.m_x = x - m_captureMouse->GetX();
1582             child_event.m_y = y - m_captureMouse->GetY();
1583             child_event.m_leftDown = event.m_leftDown;
1584             child_event.m_rightDown = event.m_rightDown;
1585             child_event.m_middleDown = event.m_middleDown;
1586             child_event.m_controlDown = event.m_controlDown;
1587             child_event.m_shiftDown = event.m_shiftDown;
1588             child_event.m_altDown = event.m_altDown;
1589             child_event.m_metaDown = event.m_metaDown;
1590
1591             m_captureMouse->ProcessEvent( child_event );
1592             return;
1593         }
1594         else
1595         {
1596             wxCanvasObject *obj = m_root->IsHitObject(x,y,0);
1597
1598             if (obj && !obj->IsControl())
1599             {
1600                 wxMouseEvent child_event( wxEVT_MOTION );
1601                 child_event.SetEventObject( obj );
1602                 child_event.m_x = x - obj->GetX();
1603                 child_event.m_y = y - obj->GetY();
1604                 child_event.m_leftDown = event.m_leftDown;
1605                 child_event.m_rightDown = event.m_rightDown;
1606                 child_event.m_middleDown = event.m_middleDown;
1607                 child_event.m_controlDown = event.m_controlDown;
1608                 child_event.m_shiftDown = event.m_shiftDown;
1609                 child_event.m_altDown = event.m_altDown;
1610                 child_event.m_metaDown = event.m_metaDown;
1611
1612                 if ((obj != m_lastMouse) && (m_lastMouse != NULL))
1613                 {
1614                     child_event.SetEventType( wxEVT_LEAVE_WINDOW );
1615                     child_event.SetEventObject( m_lastMouse );
1616                     child_event.m_x = x - m_lastMouse->GetX();
1617                     child_event.m_y = y - m_lastMouse->GetY();
1618                     m_lastMouse->ProcessEvent( child_event );
1619
1620                     m_lastMouse = obj;
1621                     child_event.SetEventType( wxEVT_ENTER_WINDOW );
1622                     child_event.SetEventObject( m_lastMouse );
1623                     child_event.m_x = x - m_lastMouse->GetX();
1624                     child_event.m_y = y - m_lastMouse->GetY();
1625                     m_lastMouse->ProcessEvent( child_event );
1626
1627                     child_event.SetEventType( wxEVT_MOTION );
1628                     child_event.SetEventObject( obj );
1629                 }
1630
1631                 obj->ProcessEvent( child_event );
1632                 return;
1633             }
1634         }
1635         if (m_lastMouse)
1636         {
1637             wxMouseEvent child_event( wxEVT_LEAVE_WINDOW );
1638             child_event.SetEventObject( m_lastMouse );
1639             child_event.m_x = x - m_lastMouse->GetX();
1640             child_event.m_y = y - m_lastMouse->GetY();
1641             child_event.m_leftDown = event.m_leftDown;
1642             child_event.m_rightDown = event.m_rightDown;
1643             child_event.m_middleDown = event.m_middleDown;
1644             child_event.m_controlDown = event.m_controlDown;
1645             child_event.m_shiftDown = event.m_shiftDown;
1646             child_event.m_altDown = event.m_altDown;
1647             child_event.m_metaDown = event.m_metaDown;
1648             m_lastMouse->ProcessEvent( child_event );
1649
1650             m_lastMouse = (wxCanvasObject*) NULL;
1651             return;
1652         }
1653     }
1654     else
1655     {
1656         if (m_captureMouse) //no matter what go to this one
1657         {
1658             wxMouseEvent child_event( event.GetEventType() );
1659             child_event.SetEventObject(m_captureMouse);
1660             child_event.m_x = x - m_captureMouse->GetX();
1661             child_event.m_y = y - m_captureMouse->GetY();
1662             child_event.m_leftDown = event.m_leftDown;
1663             child_event.m_rightDown = event.m_rightDown;
1664             child_event.m_middleDown = event.m_middleDown;
1665             child_event.m_controlDown = event.m_controlDown;
1666             child_event.m_shiftDown = event.m_shiftDown;
1667             child_event.m_altDown = event.m_altDown;
1668             child_event.m_metaDown = event.m_metaDown;
1669             m_captureMouse->ProcessEvent( child_event );
1670         }
1671         else
1672         {
1673             wxCanvasObject *obj = m_root->IsHitObject(x,y,0);
1674
1675             if (obj && !obj->IsControl())
1676             {
1677                 wxMouseEvent child_event( event.GetEventType() );
1678                 child_event.SetEventObject( obj );
1679                 child_event.m_x = x - obj->GetX();
1680                 child_event.m_y = y - obj->GetY();
1681                 child_event.m_leftDown = event.m_leftDown;
1682                 child_event.m_rightDown = event.m_rightDown;
1683                 child_event.m_middleDown = event.m_middleDown;
1684                 child_event.m_controlDown = event.m_controlDown;
1685                 child_event.m_shiftDown = event.m_shiftDown;
1686                 child_event.m_altDown = event.m_altDown;
1687                 child_event.m_metaDown = event.m_metaDown;
1688
1689                 obj->ProcessEvent( child_event );
1690                 return;
1691             }
1692         }
1693     }
1694
1695     event.Skip();
1696 }
1697
1698 void wxCanvas::OnSize(wxSizeEvent &event)
1699 {
1700     int w,h;
1701     GetClientSize( &w, &h );
1702 #if IMAGE_CANVAS
1703     m_buffer = wxImage( w, h );
1704 #else
1705     m_buffer = wxBitmap( w, h );
1706 #endif
1707
1708     CalcUnscrolledPosition( 0, 0, &m_bufferX, &m_bufferY );
1709
1710     wxNode *node = m_updateRects.First();
1711     while (node)
1712     {
1713         wxRect *rect = (wxRect*) node->Data();
1714         delete rect;
1715         m_updateRects.DeleteNode( node );
1716         node = m_updateRects.First();
1717     }
1718
1719     m_frozen = FALSE;
1720
1721     Update( m_bufferX, m_bufferY, m_buffer.GetWidth(), m_buffer.GetHeight(), FALSE );
1722
1723     event.Skip();
1724 }
1725
1726 void wxCanvas::OnIdle(wxIdleEvent &event)
1727 {
1728     UpdateNow();
1729     event.Skip();
1730 }
1731
1732 void wxCanvas::OnSetFocus(wxFocusEvent &event)
1733 {
1734 }
1735
1736 void wxCanvas::OnKillFocus(wxFocusEvent &event)
1737 {
1738 }
1739
1740 void wxCanvas::OnChar(wxKeyEvent &event)
1741 {
1742     event.Skip();
1743 }
1744
1745 void wxCanvas::OnEraseBackground(wxEraseEvent &event)
1746 {
1747 }
1748
1749 //--------------------------------------------------------------------
1750 // wxCanvasModule
1751 //--------------------------------------------------------------------
1752
1753 class wxCanvasModule : public wxModule
1754 {
1755 public:
1756     virtual bool OnInit();
1757     virtual void OnExit();
1758
1759 private:
1760     DECLARE_DYNAMIC_CLASS(wxCanvasModule)
1761 };
1762
1763 IMPLEMENT_DYNAMIC_CLASS(wxCanvasModule, wxModule)
1764
1765 bool wxCanvasModule::OnInit()
1766 {
1767 #if wxUSE_FREETYPE
1768     int error = FT_Init_FreeType( &g_freetypeLibrary );
1769     if (error) return FALSE;
1770 #endif
1771
1772     return TRUE;
1773 }
1774
1775 void wxCanvasModule::OnExit()
1776 {
1777 #if wxUSE_FREETYPE
1778     FT_Done_FreeType( g_freetypeLibrary );
1779 #endif
1780 }