src/common/dcbase.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/common/dcbase.cpp
   3 // Purpose:     generic methods of the wxDC Class
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     05/25/99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) wxWidgets team
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 #include "wx/dc.h"
  28 #include "wx/dcclient.h"
  29 #include "wx/dcmemory.h"
  30 #include "wx/dcscreen.h"
  31 #include "wx/dcbuffer.h" // for IMPLEMENT_DYNAMIC_CLASS
  32
  33 #ifndef WX_PRECOMP
  34     #include "wx/math.h"
  35 #endif
  36
  37
  38
  39 #if wxUSE_NEW_DC
  40
  41 //----------------------------------------------------------------------------
  42 // wxDCFactory
  43 //----------------------------------------------------------------------------
  44
  45 wxDCFactory *wxDCFactory::m_factory = NULL;
  46
  47 void wxDCFactory::SetDCFactory( wxDCFactory *factory )
  48 {
  49     if (wxDCFactory::m_factory)
  50         delete wxDCFactory::m_factory;
  51
  52     wxDCFactory::m_factory = factory;
  53 }
  54
  55 wxDCFactory *wxDCFactory::GetFactory()
  56 {
  57     if (!wxDCFactory::m_factory)
  58         wxDCFactory::m_factory = new wxNativeDCFactory;
  59
  60     return wxDCFactory::m_factory;
  61 }
  62
  63 //-----------------------------------------------------------------------------
  64 // wxNativeDCFactory
  65 //-----------------------------------------------------------------------------
  66
  67 wxImplDC* wxNativeDCFactory::CreateWindowDC( wxWindowDC *owner )
  68 {
  69 #if defined(__WXMSW__)
  70     return new wxWindowsWindowImplDC( owner );
  71 #elif defined(__WXGTK20__)
  72     return new wxGTKWindowImplDC( owner );
  73 #elif defined(__WXGTK__)
  74     return new wxGTKWindowImplDC( owner );
  75 #elif defined(__WXMAC__)
  76     return new wxMacWindowImplDC( owner );
  77 #elif defined(__WXCOCOA__)
  78     return new wxCocoaWindowImplDC( owner );
  79 #elif defined(__WXMOTIF__)
  80     return new wxMotifWindowImplDC( owner );
  81 #elif defined(__WXX11__)
  82     return new wxX11WindowImplDC( owner );
  83 #elif defined(__WXMGL__)
  84     return new wxMGLWindowImplDC( owner );
  85 #elif defined(__WXDFB__)
  86     return new wxDFBWindowImplDC( owner );
  87 #elif defined(__WXPM__)
  88     return new wxPMWindowImplDC( owner );
  89 #elif defined(__PALMOS__)
  90     return new wxPalmWindowImplDC( owner );
  91 #endif
  92 }
  93
  94 wxImplDC* wxNativeDCFactory::CreateWindowDC( wxWindowDC *owner, wxWindow *window )
  95 {
  96 #if defined(__WXMSW__)
  97     return new wxWindowsWindowImplDC( owner, window );
  98 #elif defined(__WXGTK20__)
  99     return new wxGTKWindowImplDC( owner, window );
 100 #elif defined(__WXGTK__)
 101     return new wxGTKWindowImplDC( owner, window );
 102 #elif defined(__WXMAC__)
 103     return new wxMacWindowImplDC( owner, window );
 104 #elif defined(__WXCOCOA__)
 105     return new wxCocoaWindowImplDC( owner, window );
 106 #elif defined(__WXMOTIF__)
 107     return new wxMotifWindowImplDC( owner, window );
 108 #elif defined(__WXX11__)
 109     return new wxX11WindowImplDC( owner, window );
 110 #elif defined(__WXMGL__)
 111     return new wxMGLWindowImplDC( owner, window );
 112 #elif defined(__WXDFB__)
 113     return new wxDFBWindowImplDC( owner, window );
 114 #elif defined(__WXPM__)
 115     return new wxPMWindowImplDC( owner, window );
 116 #elif defined(__PALMOS__)
 117     return new wxPalmWindowImplDC( owner, window );
 118 #endif
 119 }
 120
 121 wxImplDC* wxNativeDCFactory::CreateClientDC( wxClientDC *owner )
 122 {
 123 #if defined(__WXMSW__)
 124     return new wxWindowsClientImplDC( owner );
 125 #elif defined(__WXGTK20__)
 126     return new wxGTKClientImplDC( owner );
 127 #elif defined(__WXGTK__)
 128     return new wxGTKClientImplDC( owner );
 129 #elif defined(__WXMAC__)
 130     return new wxMacClientImplDC( owner );
 131 #elif defined(__WXCOCOA__)
 132     return new wxCocoaClientImplDC( owner );
 133 #elif defined(__WXMOTIF__)
 134     return new wxMotifClientImplDC( owner );
 135 #elif defined(__WXX11__)
 136     return new wxX11ClientImplDC( owner );
 137 #elif defined(__WXMGL__)
 138     return new wxMGLClientImplDC( owner );
 139 #elif defined(__WXDFB__)
 140     return new wxDFBClientImplDC( owner );
 141 #elif defined(__WXPM__)
 142     return new wxPMClientImplDC( owner );
 143 #elif defined(__PALMOS__)
 144     return new wxPalmClientImplDC( owner );
 145 #endif
 146 }
 147
 148 wxImplDC* wxNativeDCFactory::CreateClientDC( wxClientDC *owner, wxWindow *window )
 149 {
 150 #if defined(__WXMSW__)
 151     return new wxWindowsClientImplDC( owner, window );
 152 #elif defined(__WXGTK20__)
 153     return new wxGTKClientImplDC( owner, window );
 154 #elif defined(__WXGTK__)
 155     return new wxGTKClientImplDC( owner, window );
 156 #elif defined(__WXMAC__)
 157     return new wxMacClientImplDC( owner, window );
 158 #elif defined(__WXCOCOA__)
 159     return new wxCocoaClientImplDC( owner, window );
 160 #elif defined(__WXMOTIF__)
 161     return new wxMotifClientImplDC( owner, window );
 162 #elif defined(__WXX11__)
 163     return new wxX11ClientImplDC( owner, window );
 164 #elif defined(__WXMGL__)
 165     return new wxMGLClientImplDC( owner, window );
 166 #elif defined(__WXDFB__)
 167     return new wxDFBClientImplDC( owner, window );
 168 #elif defined(__WXPM__)
 169     return new wxPMClientImplDC( owner, window );
 170 #elif defined(__PALMOS__)
 171     return new wxPalmClientImplDC( owner, window );
 172 #endif
 173 }
 174
 175 wxImplDC* wxNativeDCFactory::CreatePaintDC( wxPaintDC *owner )
 176 {
 177 #if defined(__WXMSW__)
 178     return new wxWindowsPaintImplDC( owner );
 179 #elif defined(__WXGTK20__)
 180     return new wxGTKPaintImplDC( owner );
 181 #elif defined(__WXGTK__)
 182     return new wxGTKPaintImplDC( owner );
 183 #elif defined(__WXMAC__)
 184     return new wxMacPaintImplDC( owner );
 185 #elif defined(__WXCOCOA__)
 186     return new wxCocoaPaintImplDC( owner );
 187 #elif defined(__WXMOTIF__)
 188     return new wxMotifPaintImplDC( owner );
 189 #elif defined(__WXX11__)
 190     return new wxX11PaintImplDC( owner );
 191 #elif defined(__WXMGL__)
 192     return new wxMGLPaintImplDC( owner );
 193 #elif defined(__WXDFB__)
 194     return new wxDFBPaintImplDC( owner );
 195 #elif defined(__WXPM__)
 196     return new wxPMPaintImplDC( owner );
 197 #elif defined(__PALMOS__)
 198     return new wxPalmPaintImplDC( owner );
 199 #endif
 200 }
 201
 202 wxImplDC* wxNativeDCFactory::CreatePaintDC( wxPaintDC *owner, wxWindow *window )
 203 {
 204 #if defined(__WXMSW__)
 205     return new wxWindowsPaintImplDC( owner, window );
 206 #elif defined(__WXGTK20__)
 207     return new wxGTKPaintImplDC( owner, window );
 208 #elif defined(__WXGTK__)
 209     return new wxGTKPaintImplDC( owner, window );
 210 #elif defined(__WXMAC__)
 211     return new wxMacPaintImplDC( owner, window );
 212 #elif defined(__WXCOCOA__)
 213     return new wxCocoaPaintImplDC( owner, window );
 214 #elif defined(__WXMOTIF__)
 215     return new wxMotifPaintImplDC( owner, window );
 216 #elif defined(__WXX11__)
 217     return new wxX11PaintImplDC( owner, window );
 218 #elif defined(__WXMGL__)
 219     return new wxMGLPaintImplDC( owner, window );
 220 #elif defined(__WXDFB__)
 221     return new wxDFBPaintImplDC( owner, window );
 222 #elif defined(__WXPM__)
 223     return new wxPMPaintImplDC( owner, window );
 224 #elif defined(__PALMOS__)
 225     return new wxPalmPaintImplDC( owner, window );
 226 #endif
 227 }
 228
 229 wxImplDC* wxNativeDCFactory::CreateMemoryDC( wxMemoryDC *owner )
 230 {
 231 #if defined(__WXMSW__)
 232     return new wxWindowsMemoryImplDC( owner );
 233 #elif defined(__WXGTK20__)
 234     return new wxGTKMemoryImplDC( owner );
 235 #elif defined(__WXGTK__)
 236     return new wxGTKMemoryImplDC( owner );
 237 #elif defined(__WXMAC__)
 238     return new wxMacMemoryImplDC( owner );
 239 #elif defined(__WXCOCOA__)
 240     return new wxCocoaMemoryImplDC( owner );
 241 #elif defined(__WXMOTIF__)
 242     return new wxMotifMemoryImplDC( owner );
 243 #elif defined(__WXX11__)
 244     return new wxX11MemoryImplDC( owner );
 245 #elif defined(__WXMGL__)
 246     return new wxMGLMemoryImplDC( owner );
 247 #elif defined(__WXDFB__)
 248     return new wxDFBMemoryImplDC( owner );
 249 #elif defined(__WXPM__)
 250     return new wxPMMemoryImplDC( owner );
 251 #elif defined(__PALMOS__)
 252     return new wxPalmMemoryImplDC( owner );
 253 #endif
 254 }
 255
 256 wxImplDC* wxNativeDCFactory::CreateMemoryDC( wxMemoryDC *owner, wxBitmap &bitmap )
 257 {
 258 #if defined(__WXMSW__)
 259     return new wxWindowsMemoryImplDC( owner, bitmap );
 260 #elif defined(__WXGTK20__)
 261     return new wxGTKMemoryImplDC( owner, bitmap );
 262 #elif defined(__WXGTK__)
 263     return new wxGTKMemoryImplDC( owner, bitmap );
 264 #elif defined(__WXMAC__)
 265     return new wxMacMemoryImplDC( owner, bitmap );
 266 #elif defined(__WXCOCOA__)
 267     return new wxCocoaMemoryImplDC( owner, bitmap );
 268 #elif defined(__WXMOTIF__)
 269     return new wxMotifMemoryImplDC( owner, bitmap );
 270 #elif defined(__WXX11__)
 271     return new wxX11MemoryImplDC( owner, bitmap );
 272 #elif defined(__WXMGL__)
 273     return new wxMGLMemoryImplDC( owner, bitmap );
 274 #elif defined(__WXDFB__)
 275     return new wxDFBMemoryImplDC( owner, bitmap );
 276 #elif defined(__WXPM__)
 277     return new wxPMMemoryImplDC( owner, bitmap );
 278 #elif defined(__PALMOS__)
 279     return new wxPalmMemoryImplDC( owner, bitmap );
 280 #endif
 281 }
 282
 283 wxImplDC* wxNativeDCFactory::CreateMemoryDC( wxMemoryDC *owner, wxDC *dc )
 284 {
 285 #if defined(__WXMSW__)
 286     return new wxWindowsMemoryImplDC( owner, dc );
 287 #elif defined(__WXGTK20__)
 288     return new wxGTKMemoryImplDC( owner, dc );
 289 #elif defined(__WXGTK__)
 290     return new wxGTKMemoryImplDC( owner, dc );
 291 #elif defined(__WXMAC__)
 292     return new wxMacMemoryImplDC( owner, dc );
 293 #elif defined(__WXCOCOA__)
 294     return new wxCocoaMemoryImplDC( owner, dc );
 295 #elif defined(__WXMOTIF__)
 296     return new wxMotifMemoryImplDC( owner, dc );
 297 #elif defined(__WXX11__)
 298     return new wxX11MemoryImplDC( owner, dc );
 299 #elif defined(__WXMGL__)
 300     return new wxMGLMemoryImplDC( owner, dc );
 301 #elif defined(__WXDFB__)
 302     return new wxDFBMemoryImplDC( owner, dc );
 303 #elif defined(__WXPM__)
 304     return new wxPMMemoryImplDC( owner, dc );
 305 #elif defined(__PALMOS__)
 306     return new wxPalmMemoryImplDC( owner, dc );
 307 #endif
 308 }
 309
 310 wxImplDC* wxNativeDCFactory::CreateScreenDC( wxScreenDC *owner )
 311 {
 312 #if defined(__WXMSW__)
 313     return new wxWindowsScreenImplDC( owner );
 314 #elif defined(__WXGTK20__)
 315     return new wxGTKScreenImplDC( owner );
 316 #elif defined(__WXGTK__)
 317     return new wxGTKScreenImplDC( owner );
 318 #elif defined(__WXMAC__)
 319     return new wxMacScreenImplDC( owner );
 320 #elif defined(__WXCOCOA__)
 321     return new wxCocoaScreenImplDC( owner );
 322 #elif defined(__WXMOTIF__)
 323     return new wxMotifScreenImplDC( owner );
 324 #elif defined(__WXX11__)
 325     return new wxX11ScreenImplDC( owner );
 326 #elif defined(__WXMGL__)
 327     return new wxMGLScreenImplDC( owner );
 328 #elif defined(__WXDFB__)
 329     return new wxDFBScreenImplDC( owner );
 330 #elif defined(__WXPM__)
 331     return new wxPMScreenImplDC( owner );
 332 #elif defined(__PALMOS__)
 333     return new wxPalmScreenImplDC( owner );
 334 #endif
 335 }
 336
 337 //-----------------------------------------------------------------------------
 338 // wxWindowDC
 339 //-----------------------------------------------------------------------------
 340
 341 IMPLEMENT_DYNAMIC_CLASS(wxWindowDC, wxDC)
 342
 343 wxWindowDC::wxWindowDC()
 344 {
 345     wxDCFactory *factory = wxDCFactory::GetFactory();
 346     m_pimpl = factory->CreateWindowDC( this );
 347 }
 348
 349 wxWindowDC::wxWindowDC( wxWindow *win )
 350 {
 351     wxDCFactory *factory = wxDCFactory::GetFactory();
 352     m_pimpl = factory->CreateWindowDC( this, win );
 353 }
 354
 355 //-----------------------------------------------------------------------------
 356 // wxClientDC
 357 //-----------------------------------------------------------------------------
 358
 359 IMPLEMENT_DYNAMIC_CLASS(wxClientDC, wxDC)
 360
 361 wxClientDC::wxClientDC()
 362 {
 363     wxDCFactory *factory = wxDCFactory::GetFactory();
 364     m_pimpl = factory->CreateClientDC( this );
 365 }
 366
 367 wxClientDC::wxClientDC( wxWindow *win )
 368 {
 369     wxDCFactory *factory = wxDCFactory::GetFactory();
 370     m_pimpl = factory->CreateClientDC( this, win );
 371 }
 372
 373 //-----------------------------------------------------------------------------
 374 // wxMemoryDC
 375 //-----------------------------------------------------------------------------
 376
 377 IMPLEMENT_DYNAMIC_CLASS(wxMemoryDC, wxDC)
 378
 379 wxMemoryDC::wxMemoryDC()
 380 {
 381     wxDCFactory *factory = wxDCFactory::GetFactory();
 382     m_pimpl = factory->CreateMemoryDC( this );
 383 }
 384
 385 wxMemoryDC::wxMemoryDC( wxBitmap& bitmap )
 386 {
 387     wxDCFactory *factory = wxDCFactory::GetFactory();
 388     m_pimpl = factory->CreateMemoryDC( this, bitmap );
 389 }
 390
 391 wxMemoryDC::wxMemoryDC( wxDC *dc )
 392 {
 393     wxDCFactory *factory = wxDCFactory::GetFactory();
 394     m_pimpl = factory->CreateMemoryDC( this, dc );
 395 }
 396
 397 void wxMemoryDC::SelectObject(wxBitmap& bmp)
 398 {
 399     // make sure that the given wxBitmap is not sharing its data with other
 400     // wxBitmap instances as its contents will be modified by any drawing
 401     // operation done on this DC
 402     if (bmp.IsOk())
 403         bmp.UnShare();
 404
 405 #ifdef __WXGTK__
 406     wxGTKMemoryImplDC *mem_pimpl = wxDynamicCast( m_pimpl, wxGTKMemoryImplDC );
 407 #else
 408     // TODO
 409 #endif
 410     if (mem_pimpl)
 411         mem_pimpl->DoSelect(bmp);
 412 }
 413
 414 void wxMemoryDC::SelectObjectAsSource(const wxBitmap& bmp)
 415 {
 416 #ifdef __WXGTK__
 417     wxGTKMemoryImplDC *mem_pimpl = wxDynamicCast( m_pimpl, wxGTKMemoryImplDC );
 418 #else
 419     // TODO
 420 #endif
 421     mem_pimpl->DoSelect(bmp);
 422 }
 423
 424 const wxBitmap& wxMemoryDC::GetSelectedBitmap() const
 425 {
 426 #ifdef __WXGTK__
 427     wxGTKMemoryImplDC *mem_pimpl = wxDynamicCast( m_pimpl, wxGTKMemoryImplDC );
 428 #else
 429     // TODO
 430 #endif
 431     if (mem_pimpl)
 432         return mem_pimpl->DoGetSelectedBitmap();
 433
 434     return wxNullBitmap;
 435 }
 436
 437 wxBitmap& wxMemoryDC::GetSelectedBitmap()
 438 {
 439 #ifdef __WXGTK__
 440     wxGTKMemoryImplDC *mem_pimpl = wxDynamicCast( m_pimpl, wxGTKMemoryImplDC );
 441 #else
 442     // TODO
 443 #endif
 444
 445     if (mem_pimpl)
 446         return mem_pimpl->DoGetSelectedBitmap();
 447
 448     return wxNullBitmap;
 449 }
 450
 451
 452 //-----------------------------------------------------------------------------
 453 // wxPaintDC
 454 //-----------------------------------------------------------------------------
 455
 456 IMPLEMENT_DYNAMIC_CLASS(wxPaintDC, wxDC)
 457
 458 wxPaintDC::wxPaintDC()
 459 {
 460     wxDCFactory *factory = wxDCFactory::GetFactory();
 461     m_pimpl = factory->CreatePaintDC( this );
 462 }
 463
 464 wxPaintDC::wxPaintDC( wxWindow *win )
 465 {
 466     wxDCFactory *factory = wxDCFactory::GetFactory();
 467     m_pimpl = factory->CreatePaintDC( this, win );
 468 }
 469
 470 //-----------------------------------------------------------------------------
 471 // wxScreenDC
 472 //-----------------------------------------------------------------------------
 473
 474 IMPLEMENT_DYNAMIC_CLASS(wxScreenDC, wxWindowDC)
 475
 476 wxScreenDC::wxScreenDC()
 477 {
 478     wxDCFactory *factory = wxDCFactory::GetFactory();
 479     m_pimpl = factory->CreateScreenDC( this );
 480 }
 481
 482 //-----------------------------------------------------------------------------
 483 // wxImplDC
 484 //-----------------------------------------------------------------------------
 485
 486 IMPLEMENT_ABSTRACT_CLASS(wxImplDC, wxObject)
 487
 488 wxImplDC::wxImplDC( wxDC *owner )
 489         : m_colour(wxColourDisplay())
 490         , m_ok(true)
 491         , m_clipping(false)
 492         , m_isInteractive(0)
 493         , m_isBBoxValid(false)
 494         , m_logicalOriginX(0), m_logicalOriginY(0)
 495         , m_deviceOriginX(0), m_deviceOriginY(0)
 496         , m_deviceLocalOriginX(0), m_deviceLocalOriginY(0)
 497         , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
 498         , m_userScaleX(1.0), m_userScaleY(1.0)
 499         , m_scaleX(1.0), m_scaleY(1.0)
 500         , m_signX(1), m_signY(1)
 501         , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
 502         , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0)
 503         , m_logicalFunction(wxCOPY)
 504         , m_backgroundMode(wxTRANSPARENT)
 505         , m_mappingMode(wxMM_TEXT)
 506         , m_pen()
 507         , m_brush()
 508         , m_backgroundBrush(*wxTRANSPARENT_BRUSH)
 509         , m_textForegroundColour(*wxBLACK)
 510         , m_textBackgroundColour(*wxWHITE)
 511         , m_font()
 512 #if wxUSE_PALETTE
 513         , m_palette()
 514         , m_hasCustomPalette(false)
 515 #endif // wxUSE_PALETTE
 516 {
 517     m_owner = owner;
 518
 519     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
 520                     (double)wxGetDisplaySizeMM().GetWidth();
 521     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
 522                     (double)wxGetDisplaySizeMM().GetHeight();
 523
 524     ResetBoundingBox();
 525     ResetClipping();
 526 }
 527
 528 wxImplDC::~wxImplDC()
 529 {
 530 }
 531
 532 // ----------------------------------------------------------------------------
 533 // coordinate conversions and transforms
 534 // ----------------------------------------------------------------------------
 535
 536 wxCoord wxImplDC::DeviceToLogicalX(wxCoord x) const
 537 {
 538     return wxRound((double)(x - m_deviceOriginX - m_deviceLocalOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
 539 }
 540
 541 wxCoord wxImplDC::DeviceToLogicalY(wxCoord y) const
 542 {
 543     return wxRound((double)(y - m_deviceOriginY - m_deviceLocalOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
 544 }
 545
 546 wxCoord wxImplDC::DeviceToLogicalXRel(wxCoord x) const
 547 {
 548     return wxRound((double)(x) / m_scaleX);
 549 }
 550
 551 wxCoord wxImplDC::DeviceToLogicalYRel(wxCoord y) const
 552 {
 553     return wxRound((double)(y) / m_scaleY);
 554 }
 555
 556 wxCoord wxImplDC::LogicalToDeviceX(wxCoord x) const
 557 {
 558     return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX * m_signY + m_deviceLocalOriginX;
 559 }
 560
 561 wxCoord wxImplDC::LogicalToDeviceY(wxCoord y) const
 562 {
 563     return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY * m_signY + m_deviceLocalOriginY;
 564 }
 565
 566 wxCoord wxImplDC::LogicalToDeviceXRel(wxCoord x) const
 567 {
 568     return wxRound((double)(x) * m_scaleX);
 569 }
 570
 571 wxCoord wxImplDC::LogicalToDeviceYRel(wxCoord y) const
 572 {
 573     return wxRound((double)(y) * m_scaleY);
 574 }
 575
 576 void wxImplDC::ComputeScaleAndOrigin()
 577 {
 578     m_scaleX = m_logicalScaleX * m_userScaleX;
 579     m_scaleY = m_logicalScaleY * m_userScaleY;
 580 }
 581
 582 void wxImplDC::SetMapMode( int mode )
 583 {
 584     switch (mode)
 585     {
 586         case wxMM_TWIPS:
 587           SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
 588           break;
 589         case wxMM_POINTS:
 590           SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
 591           break;
 592         case wxMM_METRIC:
 593           SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
 594           break;
 595         case wxMM_LOMETRIC:
 596           SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
 597           break;
 598         default:
 599         case wxMM_TEXT:
 600           SetLogicalScale( 1.0, 1.0 );
 601           break;
 602     }
 603     m_mappingMode = mode;
 604 }
 605
 606 void wxImplDC::SetUserScale( double x, double y )
 607 {
 608     // allow negative ? -> no
 609     m_userScaleX = x;
 610     m_userScaleY = y;
 611     ComputeScaleAndOrigin();
 612 }
 613
 614 void wxImplDC::SetLogicalScale( double x, double y )
 615 {
 616     // allow negative ?
 617     m_logicalScaleX = x;
 618     m_logicalScaleY = y;
 619     ComputeScaleAndOrigin();
 620 }
 621
 622 void wxImplDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 623 {
 624     m_logicalOriginX = x * m_signX;
 625     m_logicalOriginY = y * m_signY;
 626     ComputeScaleAndOrigin();
 627 }
 628
 629 void wxImplDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 630 {
 631     m_deviceOriginX = x;
 632     m_deviceOriginY = y;
 633     ComputeScaleAndOrigin();
 634 }
 635
 636 void wxImplDC::SetDeviceLocalOrigin( wxCoord x, wxCoord y )
 637 {
 638     m_deviceLocalOriginX = x;
 639     m_deviceLocalOriginY = y;
 640     ComputeScaleAndOrigin();
 641 }
 642
 643 void wxImplDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 644 {
 645     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
 646     // wxWidgets 2.9: no longer override it
 647     m_signX = (xLeftRight ?  1 : -1);
 648     m_signY = (yBottomUp  ? -1 :  1);
 649     ComputeScaleAndOrigin();
 650 }
 651
 652
 653 // Each element of the widths array will be the width of the string up to and
 654 // including the corresponding character in text.  This is the generic
 655 // implementation, the port-specific classes should do this with native APIs
 656 // if available and if faster.  Note: pango_layout_index_to_pos is much slower
 657 // than calling GetTextExtent!!
 658
 659 #define FWC_SIZE 256
 660
 661 class FontWidthCache
 662 {
 663 public:
 664     FontWidthCache() : m_scaleX(1), m_widths(NULL) { }
 665     ~FontWidthCache() { delete []m_widths; }
 666
 667     void Reset()
 668     {
 669         if (!m_widths)
 670             m_widths = new int[FWC_SIZE];
 671
 672         memset(m_widths, 0, sizeof(int)*FWC_SIZE);
 673     }
 674
 675     wxFont m_font;
 676     double m_scaleX;
 677     int *m_widths;
 678 };
 679
 680 static FontWidthCache s_fontWidthCache;
 681
 682 bool wxImplDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
 683 {
 684     int totalWidth = 0;
 685
 686     const size_t len = text.length();
 687     widths.Empty();
 688     widths.Add(0, len);
 689
 690     // reset the cache if font or horizontal scale have changed
 691     if ( !s_fontWidthCache.m_widths ||
 692          !wxIsSameDouble(s_fontWidthCache.m_scaleX, m_scaleX) ||
 693          (s_fontWidthCache.m_font != GetFont()) )
 694     {
 695         s_fontWidthCache.Reset();
 696         s_fontWidthCache.m_font = GetFont();
 697         s_fontWidthCache.m_scaleX = m_scaleX;
 698     }
 699
 700     // Calculate the position of each character based on the widths of
 701     // the previous characters
 702     int w, h;
 703     for ( size_t i = 0; i < len; i++ )
 704     {
 705         const wxChar c = text[i];
 706         unsigned int c_int = (unsigned int)c;
 707
 708         if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
 709         {
 710             w = s_fontWidthCache.m_widths[c_int];
 711         }
 712         else
 713         {
 714             DoGetTextExtent(c, &w, &h);
 715             if (c_int < FWC_SIZE)
 716                 s_fontWidthCache.m_widths[c_int] = w;
 717         }
 718
 719         totalWidth += w;
 720         widths[i] = totalWidth;
 721     }
 722
 723     return true;
 724 }
 725
 726 void wxImplDC::GetMultiLineTextExtent(const wxString& text,
 727                                       wxCoord *x,
 728                                       wxCoord *y,
 729                                       wxCoord *h,
 730                                       const wxFont *font) const
 731 {
 732     wxCoord widthTextMax = 0, widthLine,
 733             heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
 734
 735     wxString curLine;
 736     for ( const wxChar *pc = text; ; pc++ )
 737     {
 738         if ( *pc == _T('\n') || *pc == _T('\0') )
 739         {
 740             if ( curLine.empty() )
 741             {
 742                 // we can't use GetTextExtent - it will return 0 for both width
 743                 // and height and an empty line should count in height
 744                 // calculation
 745
 746                 // assume that this line has the same height as the previous
 747                 // one
 748                 if ( !heightLineDefault )
 749                     heightLineDefault = heightLine;
 750
 751                 if ( !heightLineDefault )
 752                 {
 753                     // but we don't know it yet - choose something reasonable
 754                     DoGetTextExtent(_T("W"), NULL, &heightLineDefault,
 755                                   NULL, NULL, font);
 756                 }
 757
 758                 heightTextTotal += heightLineDefault;
 759             }
 760             else
 761             {
 762                 DoGetTextExtent(curLine, &widthLine, &heightLine,
 763                               NULL, NULL, font);
 764                 if ( widthLine > widthTextMax )
 765                     widthTextMax = widthLine;
 766                 heightTextTotal += heightLine;
 767             }
 768
 769             if ( *pc == _T('\n') )
 770             {
 771                curLine.clear();
 772             }
 773             else
 774             {
 775                // the end of string
 776                break;
 777             }
 778         }
 779         else
 780         {
 781             curLine += *pc;
 782         }
 783     }
 784
 785     if ( x )
 786         *x = widthTextMax;
 787     if ( y )
 788         *y = heightTextTotal;
 789     if ( h )
 790         *h = heightLine;
 791 }
 792
 793 void wxImplDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
 794                                wxCoord width, wxCoord height)
 795 {
 796     wxCHECK_RET( IsOk(), wxT("invalid window dc") );
 797
 798     wxCoord x2 = x1 + width,
 799             y2 = y1 + height;
 800
 801     // the pen width is calibrated to give 3 for width == height == 10
 802     wxDCPenChanger pen( *m_owner, wxPen(GetTextForeground(), (width + height + 1)/7));
 803
 804     // we're drawing a scaled version of wx/generic/tick.xpm here
 805     wxCoord x3 = x1 + (4*width) / 10,   // x of the tick bottom
 806             y3 = y1 + height / 2;       // y of the left tick branch
 807     DoDrawLine(x1, y3, x3, y2);
 808     DoDrawLine(x3, y2, x2, y1);
 809
 810     CalcBoundingBox(x1, y1);
 811     CalcBoundingBox(x2, y2);
 812 }
 813
 814 bool
 815 wxImplDC::DoStretchBlit(wxCoord xdest, wxCoord ydest,
 816                         wxCoord dstWidth, wxCoord dstHeight,
 817                         wxDC *source,
 818                         wxCoord xsrc, wxCoord ysrc,
 819                         wxCoord srcWidth, wxCoord srcHeight,
 820                         int rop,
 821                         bool useMask,
 822                         wxCoord xsrcMask,
 823                         wxCoord ysrcMask)
 824 {
 825     wxCHECK_MSG( srcWidth && srcHeight && dstWidth && dstHeight, false,
 826                  _T("invalid blit size") );
 827
 828     // emulate the stretching by modifying the DC scale
 829     double xscale = (double)srcWidth/dstWidth,
 830            yscale = (double)srcHeight/dstHeight;
 831
 832     double xscaleOld, yscaleOld;
 833     GetUserScale(&xscaleOld, &yscaleOld);
 834     SetUserScale(xscaleOld/xscale, yscaleOld/yscale);
 835
 836     bool rc = DoBlit(wxCoord(xdest*xscale), wxCoord(ydest*yscale),
 837                      wxCoord(dstWidth*xscale), wxCoord(dstHeight*yscale),
 838                      source,
 839                      xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
 840
 841     SetUserScale(xscaleOld, yscaleOld);
 842
 843     return rc;
 844 }
 845
 846 void wxImplDC::DrawLines(const wxPointList *list, wxCoord xoffset, wxCoord yoffset)
 847 {
 848     int n = list->GetCount();
 849     wxPoint *points = new wxPoint[n];
 850
 851     int i = 0;
 852     for ( wxPointList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
 853     {
 854         wxPoint *point = node->GetData();
 855         points[i].x = point->x;
 856         points[i].y = point->y;
 857     }
 858
 859     DoDrawLines(n, points, xoffset, yoffset);
 860
 861     delete [] points;
 862 }
 863
 864 void wxImplDC::DrawPolygon(const wxPointList *list,
 865                            wxCoord xoffset, wxCoord yoffset,
 866                            int fillStyle)
 867 {
 868     int n = list->GetCount();
 869     wxPoint *points = new wxPoint[n];
 870
 871     int i = 0;
 872     for ( wxPointList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
 873     {
 874         wxPoint *point = node->GetData();
 875         points[i].x = point->x;
 876         points[i].y = point->y;
 877     }
 878
 879     DoDrawPolygon(n, points, xoffset, yoffset, fillStyle);
 880
 881     delete [] points;
 882 }
 883
 884 void
 885 wxImplDC::DoDrawPolyPolygon(int n,
 886                             int count[],
 887                             wxPoint points[],
 888                             wxCoord xoffset, wxCoord yoffset,
 889                             int fillStyle)
 890 {
 891     if ( n == 1 )
 892     {
 893         DoDrawPolygon(count[0], points, xoffset, yoffset, fillStyle);
 894         return;
 895     }
 896
 897     int      i, j, lastOfs;
 898     wxPoint* pts;
 899     wxPen    pen;
 900
 901     for (i = j = lastOfs = 0; i < n; i++)
 902     {
 903         lastOfs = j;
 904         j      += count[i];
 905     }
 906     pts = new wxPoint[j+n-1];
 907     for (i = 0; i < j; i++)
 908         pts[i] = points[i];
 909     for (i = 2; i <= n; i++)
 910     {
 911         lastOfs -= count[n-i];
 912         pts[j++] = pts[lastOfs];
 913     }
 914
 915     pen = GetPen();
 916     SetPen(wxPen(*wxBLACK, 0, wxTRANSPARENT));
 917     DoDrawPolygon(j, pts, xoffset, yoffset, fillStyle);
 918     SetPen(pen);
 919     for (i = j = 0; i < n; i++)
 920     {
 921         DoDrawLines(count[i], pts+j, xoffset, yoffset);
 922         j += count[i];
 923     }
 924     delete[] pts;
 925 }
 926
 927 #if wxUSE_SPLINES
 928
 929 void wxImplDC::DoDrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3)
 930 {
 931     wxPointList point_list;
 932
 933     wxPoint *point1 = new wxPoint;
 934     point1->x = x1; point1->y = y1;
 935     point_list.Append( point1 );
 936
 937     wxPoint *point2 = new wxPoint;
 938     point2->x = x2; point2->y = y2;
 939     point_list.Append( point2 );
 940
 941     wxPoint *point3 = new wxPoint;
 942     point3->x = x3; point3->y = y3;
 943     point_list.Append( point3 );
 944
 945     DoDrawSpline(&point_list);
 946
 947     for( wxPointList::compatibility_iterator node = point_list.GetFirst(); node; node = node->GetNext() )
 948     {
 949         wxPoint *p = node->GetData();
 950         delete p;
 951     }
 952 }
 953
 954 void wxImplDC::DoDrawSpline(int n, wxPoint points[])
 955 {
 956     wxPointList list;
 957     for (int i =0; i < n; i++)
 958         list.Append( &points[i] );
 959
 960     DoDrawSpline(&list);
 961 }
 962
 963 // ----------------------------------- spline code ----------------------------------------
 964
 965 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
 966                          double a3, double b3, double a4, double b4);
 967 void wx_clear_stack();
 968 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
 969         double *y3, double *x4, double *y4);
 970 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
 971           double x4, double y4);
 972 static bool wx_spline_add_point(double x, double y);
 973 static void wx_spline_draw_point_array(wxDC *dc);
 974
 975 wxPointList wx_spline_point_list;
 976
 977 #define                half(z1, z2)        ((z1+z2)/2.0)
 978 #define                THRESHOLD        5
 979
 980 /* iterative version */
 981
 982 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
 983                  double b4)
 984 {
 985     register double  xmid, ymid;
 986     double           x1, y1, x2, y2, x3, y3, x4, y4;
 987
 988     wx_clear_stack();
 989     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
 990
 991     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
 992         xmid = (double)half(x2, x3);
 993         ymid = (double)half(y2, y3);
 994         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
 995             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
 996             wx_spline_add_point( x1, y1 );
 997             wx_spline_add_point( xmid, ymid );
 998         } else {
 999             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
1000                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
1001             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
1002                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
1003         }
1004     }
1005 }
1006
1007 /* utilities used by spline drawing routines */
1008
1009 typedef struct wx_spline_stack_struct {
1010     double           x1, y1, x2, y2, x3, y3, x4, y4;
1011 } Stack;
1012
1013 #define         SPLINE_STACK_DEPTH             20
1014 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
1015 static Stack   *wx_stack_top;
1016 static int      wx_stack_count;
1017
1018 void wx_clear_stack()
1019 {
1020     wx_stack_top = wx_spline_stack;
1021     wx_stack_count = 0;
1022 }
1023
1024 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
1025 {
1026     wx_stack_top->x1 = x1;
1027     wx_stack_top->y1 = y1;
1028     wx_stack_top->x2 = x2;
1029     wx_stack_top->y2 = y2;
1030     wx_stack_top->x3 = x3;
1031     wx_stack_top->y3 = y3;
1032     wx_stack_top->x4 = x4;
1033     wx_stack_top->y4 = y4;
1034     wx_stack_top++;
1035     wx_stack_count++;
1036 }
1037
1038 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
1039                   double *x3, double *y3, double *x4, double *y4)
1040 {
1041     if (wx_stack_count == 0)
1042         return (0);
1043     wx_stack_top--;
1044     wx_stack_count--;
1045     *x1 = wx_stack_top->x1;
1046     *y1 = wx_stack_top->y1;
1047     *x2 = wx_stack_top->x2;
1048     *y2 = wx_stack_top->y2;
1049     *x3 = wx_stack_top->x3;
1050     *y3 = wx_stack_top->y3;
1051     *x4 = wx_stack_top->x4;
1052     *y4 = wx_stack_top->y4;
1053     return (1);
1054 }
1055
1056 static bool wx_spline_add_point(double x, double y)
1057 {
1058     wxPoint *point = new wxPoint( wxRound(x), wxRound(y) );
1059     wx_spline_point_list.Append(point );
1060     return true;
1061 }
1062
1063 static void wx_spline_draw_point_array(wxDC *dc)
1064 {
1065     wxPointList::compatibility_iterator node = wx_spline_point_list.GetFirst();
1066     while (node)
1067     {
1068         wxPoint *point = node->GetData();
1069         delete point;
1070         wx_spline_point_list.Erase(node);
1071         node = wx_spline_point_list.GetFirst();
1072     }
1073 }
1074
1075 void wxImplDC::DoDrawSpline( const wxPointList *points )
1076 {
1077     wxCHECK_RET( IsOk(), wxT("invalid window dc") );
1078
1079     wxPoint *p;
1080     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
1081     double           x1, y1, x2, y2;
1082
1083     wxPointList::compatibility_iterator node = points->GetFirst();
1084     if (!node)
1085         // empty list
1086         return;
1087
1088     p = (wxPoint *)node->GetData();
1089
1090     x1 = p->x;
1091     y1 = p->y;
1092
1093     node = node->GetNext();
1094     p = node->GetData();
1095
1096     x2 = p->x;
1097     y2 = p->y;
1098     cx1 = (double)((x1 + x2) / 2);
1099     cy1 = (double)((y1 + y2) / 2);
1100     cx2 = (double)((cx1 + x2) / 2);
1101     cy2 = (double)((cy1 + y2) / 2);
1102
1103     wx_spline_add_point(x1, y1);
1104
1105     while ((node = node->GetNext())
1106 #if !wxUSE_STL
1107            != NULL
1108 #endif // !wxUSE_STL
1109           )
1110     {
1111         p = node->GetData();
1112         x1 = x2;
1113         y1 = y2;
1114         x2 = p->x;
1115         y2 = p->y;
1116         cx4 = (double)(x1 + x2) / 2;
1117         cy4 = (double)(y1 + y2) / 2;
1118         cx3 = (double)(x1 + cx4) / 2;
1119         cy3 = (double)(y1 + cy4) / 2;
1120
1121         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
1122
1123         cx1 = cx4;
1124         cy1 = cy4;
1125         cx2 = (double)(cx1 + x2) / 2;
1126         cy2 = (double)(cy1 + y2) / 2;
1127     }
1128
1129     wx_spline_add_point( cx1, cy1 );
1130     wx_spline_add_point( x2, y2 );
1131
1132     wx_spline_draw_point_array( m_owner );
1133 }
1134
1135 #endif // wxUSE_SPLINES
1136
1137
1138
1139 void wxImplDC::DoGradientFillLinear(const wxRect& rect,
1140                                     const wxColour& initialColour,
1141                                     const wxColour& destColour,
1142                                     wxDirection nDirection)
1143 {
1144     // save old pen
1145     wxPen oldPen = m_pen;
1146     wxBrush oldBrush = m_brush;
1147
1148     wxUint8 nR1 = initialColour.Red();
1149     wxUint8 nG1 = initialColour.Green();
1150     wxUint8 nB1 = initialColour.Blue();
1151     wxUint8 nR2 = destColour.Red();
1152     wxUint8 nG2 = destColour.Green();
1153     wxUint8 nB2 = destColour.Blue();
1154     wxUint8 nR, nG, nB;
1155
1156     if ( nDirection == wxEAST || nDirection == wxWEST )
1157     {
1158         wxInt32 x = rect.GetWidth();
1159         wxInt32 w = x;              // width of area to shade
1160         wxInt32 xDelta = w/256;     // height of one shade bend
1161         if (xDelta < 1)
1162             xDelta = 1;
1163
1164         while (x >= xDelta)
1165         {
1166             x -= xDelta;
1167             if (nR1 > nR2)
1168                 nR = nR1 - (nR1-nR2)*(w-x)/w;
1169             else
1170                 nR = nR1 + (nR2-nR1)*(w-x)/w;
1171
1172             if (nG1 > nG2)
1173                 nG = nG1 - (nG1-nG2)*(w-x)/w;
1174             else
1175                 nG = nG1 + (nG2-nG1)*(w-x)/w;
1176
1177             if (nB1 > nB2)
1178                 nB = nB1 - (nB1-nB2)*(w-x)/w;
1179             else
1180                 nB = nB1 + (nB2-nB1)*(w-x)/w;
1181
1182             wxColour colour(nR,nG,nB);
1183             SetPen(wxPen(colour, 1, wxSOLID));
1184             SetBrush(wxBrush(colour));
1185             if(nDirection == wxEAST)
1186                 DoDrawRectangle(rect.GetRight()-x-xDelta+1, rect.GetTop(),
1187                         xDelta, rect.GetHeight());
1188             else //nDirection == wxWEST
1189                 DoDrawRectangle(rect.GetLeft()+x, rect.GetTop(),
1190                         xDelta, rect.GetHeight());
1191         }
1192     }
1193     else  // nDirection == wxNORTH || nDirection == wxSOUTH
1194     {
1195         wxInt32 y = rect.GetHeight();
1196         wxInt32 w = y;              // height of area to shade
1197         wxInt32 yDelta = w/255;     // height of one shade bend
1198         if (yDelta < 1)
1199             yDelta = 1;
1200
1201         while (y > 0)
1202         {
1203             y -= yDelta;
1204             if (nR1 > nR2)
1205                 nR = nR1 - (nR1-nR2)*(w-y)/w;
1206             else
1207                 nR = nR1 + (nR2-nR1)*(w-y)/w;
1208
1209             if (nG1 > nG2)
1210                 nG = nG1 - (nG1-nG2)*(w-y)/w;
1211             else
1212                 nG = nG1 + (nG2-nG1)*(w-y)/w;
1213
1214             if (nB1 > nB2)
1215                 nB = nB1 - (nB1-nB2)*(w-y)/w;
1216             else
1217                 nB = nB1 + (nB2-nB1)*(w-y)/w;
1218
1219             wxColour colour(nR,nG,nB);
1220             SetPen(wxPen(colour, 1, wxSOLID));
1221             SetBrush(wxBrush(colour));
1222             if(nDirection == wxNORTH)
1223                 DoDrawRectangle(rect.GetLeft(), rect.GetTop()+y,
1224                         rect.GetWidth(), yDelta);
1225             else //nDirection == wxSOUTH
1226                 DoDrawRectangle(rect.GetLeft(), rect.GetBottom()-y-yDelta+1,
1227                         rect.GetWidth(), yDelta);
1228         }
1229     }
1230
1231     SetPen(oldPen);
1232     SetBrush(oldBrush);
1233 }
1234
1235 void wxImplDC::DoGradientFillConcentric(const wxRect& rect,
1236                                       const wxColour& initialColour,
1237                                       const wxColour& destColour,
1238                                       const wxPoint& circleCenter)
1239 {
1240     //save the old pen color
1241     wxColour oldPenColour = m_pen.GetColour();
1242
1243     wxUint8 nR1 = destColour.Red();
1244     wxUint8 nG1 = destColour.Green();
1245     wxUint8 nB1 = destColour.Blue();
1246     wxUint8 nR2 = initialColour.Red();
1247     wxUint8 nG2 = initialColour.Green();
1248     wxUint8 nB2 = initialColour.Blue();
1249     wxUint8 nR, nG, nB;
1250
1251
1252     //Radius
1253     wxInt32 cx = rect.GetWidth() / 2;
1254     wxInt32 cy = rect.GetHeight() / 2;
1255     wxInt32 nRadius;
1256     if (cx < cy)
1257         nRadius = cx;
1258     else
1259         nRadius = cy;
1260
1261     //Offset of circle
1262     wxInt32 nCircleOffX = circleCenter.x - (rect.GetWidth() / 2);
1263     wxInt32 nCircleOffY = circleCenter.y - (rect.GetHeight() / 2);
1264
1265     for ( wxInt32 x = 0; x < rect.GetWidth(); x++ )
1266     {
1267         for ( wxInt32 y = 0; y < rect.GetHeight(); y++ )
1268         {
1269             //get color difference
1270             wxInt32 nGradient = ((nRadius -
1271                                   (wxInt32)sqrt(
1272                                     pow((double)(x - cx - nCircleOffX), 2) +
1273                                     pow((double)(y - cy - nCircleOffY), 2)
1274                                   )) * 100) / nRadius;
1275
1276             //normalize Gradient
1277             if (nGradient < 0 )
1278                 nGradient = 0;
1279
1280             //get dest colors
1281             nR = (wxUint8)(nR1 + ((nR2 - nR1) * nGradient / 100));
1282             nG = (wxUint8)(nG1 + ((nG2 - nG1) * nGradient / 100));
1283             nB = (wxUint8)(nB1 + ((nB2 - nB1) * nGradient / 100));
1284
1285             //set the pixel
1286             m_pen.SetColour(wxColour(nR,nG,nB));
1287             DoDrawPoint(x + rect.GetLeft(), y + rect.GetTop());
1288         }
1289     }
1290     //return old pen color
1291     m_pen.SetColour(oldPenColour);
1292 }
1293
1294 //-----------------------------------------------------------------------------
1295 // wxDC
1296 //-----------------------------------------------------------------------------
1297
1298 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
1299
1300 void wxDC::DrawLabel(const wxString& text,
1301                          const wxBitmap& bitmap,
1302                          const wxRect& rect,
1303                          int alignment,
1304                          int indexAccel,
1305                          wxRect *rectBounding)
1306 {
1307     // find the text position
1308     wxCoord widthText, heightText, heightLine;
1309     GetMultiLineTextExtent(text, &widthText, &heightText, &heightLine);
1310
1311     wxCoord width, height;
1312     if ( bitmap.Ok() )
1313     {
1314         width = widthText + bitmap.GetWidth();
1315         height = bitmap.GetHeight();
1316     }
1317     else // no bitmap
1318     {
1319         width = widthText;
1320         height = heightText;
1321     }
1322
1323     wxCoord x, y;
1324     if ( alignment & wxALIGN_RIGHT )
1325     {
1326         x = rect.GetRight() - width;
1327     }
1328     else if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
1329     {
1330         x = (rect.GetLeft() + rect.GetRight() + 1 - width) / 2;
1331     }
1332     else // alignment & wxALIGN_LEFT
1333     {
1334         x = rect.GetLeft();
1335     }
1336
1337     if ( alignment & wxALIGN_BOTTOM )
1338     {
1339         y = rect.GetBottom() - height;
1340     }
1341     else if ( alignment & wxALIGN_CENTRE_VERTICAL )
1342     {
1343         y = (rect.GetTop() + rect.GetBottom() + 1 - height) / 2;
1344     }
1345     else // alignment & wxALIGN_TOP
1346     {
1347         y = rect.GetTop();
1348     }
1349
1350     // draw the bitmap first
1351     wxCoord x0 = x,
1352             y0 = y,
1353             width0 = width;
1354     if ( bitmap.Ok() )
1355     {
1356         DrawBitmap(bitmap, x, y, true /* use mask */);
1357
1358         wxCoord offset = bitmap.GetWidth() + 4;
1359         x += offset;
1360         width -= offset;
1361
1362         y += (height - heightText) / 2;
1363     }
1364
1365     // we will draw the underscore under the accel char later
1366     wxCoord startUnderscore = 0,
1367             endUnderscore = 0,
1368             yUnderscore = 0;
1369
1370     // split the string into lines and draw each of them separately
1371     wxString curLine;
1372     for ( wxString::const_iterator pc = text.begin(); ; ++pc )
1373     {
1374         if ( *pc == _T('\n') || pc == text.end() )
1375         {
1376             int xRealStart = x; // init it here to avoid compielr warnings
1377
1378             if ( !curLine.empty() )
1379             {
1380                 // NB: can't test for !(alignment & wxALIGN_LEFT) because
1381                 //     wxALIGN_LEFT is 0
1382                 if ( alignment & (wxALIGN_RIGHT | wxALIGN_CENTRE_HORIZONTAL) )
1383                 {
1384                     wxCoord widthLine;
1385                     GetTextExtent(curLine, &widthLine, NULL);
1386
1387                     if ( alignment & wxALIGN_RIGHT )
1388                     {
1389                         xRealStart += width - widthLine;
1390                     }
1391                     else // if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
1392                     {
1393                         xRealStart += (width - widthLine) / 2;
1394                     }
1395                 }
1396                 //else: left aligned, nothing to do
1397
1398                 DrawText(curLine, xRealStart, y);
1399             }
1400
1401             y += heightLine;
1402
1403             // do we have underscore in this line? we can check yUnderscore
1404             // because it is set below to just y + heightLine if we do
1405             if ( y == yUnderscore )
1406             {
1407                 // adjust the horz positions to account for the shift
1408                 startUnderscore += xRealStart;
1409                 endUnderscore += xRealStart;
1410             }
1411
1412             if ( pc == text.end() )
1413                 break;
1414
1415             curLine.clear();
1416         }
1417         else // not end of line
1418         {
1419             if ( pc - text.begin() == indexAccel )
1420             {
1421                 // remeber to draw underscore here
1422                 GetTextExtent(curLine, &startUnderscore, NULL);
1423                 curLine += *pc;
1424                 GetTextExtent(curLine, &endUnderscore, NULL);
1425
1426                 yUnderscore = y + heightLine;
1427             }
1428             else
1429             {
1430                 curLine += *pc;
1431             }
1432         }
1433     }
1434
1435     // draw the underscore if found
1436     if ( startUnderscore != endUnderscore )
1437     {
1438         // it should be of the same colour as text
1439         SetPen(wxPen(GetTextForeground(), 0, wxSOLID));
1440
1441         yUnderscore--;
1442
1443         DrawLine(startUnderscore, yUnderscore, endUnderscore, yUnderscore);
1444     }
1445
1446     // return bounding rect if requested
1447     if ( rectBounding )
1448     {
1449         *rectBounding = wxRect(x, y - heightText, widthText, heightText);
1450     }
1451
1452     CalcBoundingBox(x0, y0);
1453     CalcBoundingBox(x0 + width0, y0 + height);
1454 }
1455
1456 #if WXWIN_COMPATIBILITY_2_8
1457     // for compatibility with the old code when wxCoord was long everywhere
1458 void wxDC::GetTextExtent(const wxString& string,
1459                        long *x, long *y,
1460                        long *descent,
1461                        long *externalLeading,
1462                        const wxFont *theFont) const
1463     {
1464         wxCoord x2, y2, descent2, externalLeading2;
1465         m_pimpl->DoGetTextExtent(string, &x2, &y2,
1466                         &descent2, &externalLeading2,
1467                         theFont);
1468         if ( x )
1469             *x = x2;
1470         if ( y )
1471             *y = y2;
1472         if ( descent )
1473             *descent = descent2;
1474         if ( externalLeading )
1475             *externalLeading = externalLeading2;
1476     }
1477
1478 void wxDC::GetLogicalOrigin(long *x, long *y) const
1479     {
1480         wxCoord x2, y2;
1481         m_pimpl->DoGetLogicalOrigin(&x2, &y2);
1482         if ( x )
1483             *x = x2;
1484         if ( y )
1485             *y = y2;
1486     }
1487
1488 void wxDC::GetDeviceOrigin(long *x, long *y) const
1489     {
1490         wxCoord x2, y2;
1491         m_pimpl->DoGetDeviceOrigin(&x2, &y2);
1492         if ( x )
1493             *x = x2;
1494         if ( y )
1495             *y = y2;
1496     }
1497
1498 void wxDC::GetClippingBox(long *x, long *y, long *w, long *h) const
1499     {
1500         wxCoord xx,yy,ww,hh;
1501         m_pimpl->DoGetClippingBox(&xx, &yy, &ww, &hh);
1502         if (x) *x = xx;
1503         if (y) *y = yy;
1504         if (w) *w = ww;
1505         if (h) *h = hh;
1506     }
1507
1508 #endif  // WXWIN_COMPATIBILITY_2_8
1509
1510
1511 #else  // wxUSE_NEW_DC
1512
1513
1514 // bool wxDCBase::sm_cacheing = false;
1515
1516 IMPLEMENT_ABSTRACT_CLASS(wxDCBase, wxObject)
1517
1518 // ============================================================================
1519 // implementation
1520 // ============================================================================
1521
1522 IMPLEMENT_DYNAMIC_CLASS(wxBufferedDC, wxMemoryDC)
1523 IMPLEMENT_ABSTRACT_CLASS(wxBufferedPaintDC, wxBufferedDC)
1524
1525 wxDCBase::wxDCBase()
1526         : m_colour(wxColourDisplay())
1527         , m_ok(true)
1528         , m_clipping(false)
1529         , m_isInteractive(0)
1530         , m_isBBoxValid(false)
1531         , m_logicalOriginX(0), m_logicalOriginY(0)
1532         , m_deviceOriginX(0), m_deviceOriginY(0)
1533         , m_deviceLocalOriginX(0), m_deviceLocalOriginY(0)
1534         , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
1535         , m_userScaleX(1.0), m_userScaleY(1.0)
1536         , m_scaleX(1.0), m_scaleY(1.0)
1537         , m_signX(1), m_signY(1)
1538         , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
1539         , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0)
1540         , m_logicalFunction(wxCOPY)
1541         , m_backgroundMode(wxTRANSPARENT)
1542         , m_mappingMode(wxMM_TEXT)
1543         , m_pen()
1544         , m_brush()
1545         , m_backgroundBrush(*wxTRANSPARENT_BRUSH)
1546         , m_textForegroundColour(*wxBLACK)
1547         , m_textBackgroundColour(*wxWHITE)
1548         , m_font()
1549 #if wxUSE_PALETTE
1550         , m_palette()
1551         , m_hasCustomPalette(false)
1552 #endif // wxUSE_PALETTE
1553 {
1554     m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
1555                     (double)wxGetDisplaySizeMM().GetWidth();
1556     m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
1557                     (double)wxGetDisplaySizeMM().GetHeight();
1558
1559     ResetBoundingBox();
1560     ResetClipping();
1561 }
1562
1563 wxDCBase::~wxDCBase()
1564 {
1565 }
1566
1567 #if WXWIN_COMPATIBILITY_2_6
1568 void wxDCBase::BeginDrawing()
1569 {
1570 }
1571
1572 void wxDCBase::EndDrawing()
1573 {
1574 }
1575 #endif // WXWIN_COMPATIBILITY_2_6
1576
1577 #if WXWIN_COMPATIBILITY_2_8
1578     // for compatibility with the old code when wxCoord was long everywhere
1579 void wxDCBase::GetTextExtent(const wxString& string,
1580                        long *x, long *y,
1581                        long *descent,
1582                        long *externalLeading,
1583                        const wxFont *theFont) const
1584     {
1585         wxCoord x2, y2, descent2, externalLeading2;
1586         DoGetTextExtent(string, &x2, &y2,
1587                         &descent2, &externalLeading2,
1588                         theFont);
1589         if ( x )
1590             *x = x2;
1591         if ( y )
1592             *y = y2;
1593         if ( descent )
1594             *descent = descent2;
1595         if ( externalLeading )
1596             *externalLeading = externalLeading2;
1597     }
1598
1599 void wxDCBase::GetLogicalOrigin(long *x, long *y) const
1600     {
1601         wxCoord x2, y2;
1602         DoGetLogicalOrigin(&x2, &y2);
1603         if ( x )
1604             *x = x2;
1605         if ( y )
1606             *y = y2;
1607     }
1608
1609 void wxDCBase::GetDeviceOrigin(long *x, long *y) const
1610     {
1611         wxCoord x2, y2;
1612         DoGetDeviceOrigin(&x2, &y2);
1613         if ( x )
1614             *x = x2;
1615         if ( y )
1616             *y = y2;
1617     }
1618
1619 void wxDCBase::GetClippingBox(long *x, long *y, long *w, long *h) const
1620     {
1621         wxCoord xx,yy,ww,hh;
1622         DoGetClippingBox(&xx, &yy, &ww, &hh);
1623         if (x) *x = xx;
1624         if (y) *y = yy;
1625         if (w) *w = ww;
1626         if (h) *h = hh;
1627     }
1628 #endif  // WXWIN_COMPATIBILITY_2_8
1629
1630
1631
1632 // ----------------------------------------------------------------------------
1633 // coordinate conversions and transforms
1634 // ----------------------------------------------------------------------------
1635
1636 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1637 {
1638     return wxRound((double)(x - m_deviceOriginX - m_deviceLocalOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
1639 }
1640
1641 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1642 {
1643     return wxRound((double)(y - m_deviceOriginY - m_deviceLocalOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
1644 }
1645
1646 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1647 {
1648     return wxRound((double)(x) / m_scaleX);
1649 }
1650
1651 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1652 {
1653     return wxRound((double)(y) / m_scaleY);
1654 }
1655
1656 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1657 {
1658     return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX + m_deviceLocalOriginX;
1659 }
1660
1661 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1662 {
1663     return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY + m_deviceLocalOriginY;
1664 }
1665
1666 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1667 {
1668     return wxRound((double)(x) * m_scaleX);
1669 }
1670
1671 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1672 {
1673     return wxRound((double)(y) * m_scaleY);
1674 }
1675
1676 void wxDCBase::ComputeScaleAndOrigin()
1677 {
1678     m_scaleX = m_logicalScaleX * m_userScaleX;
1679     m_scaleY = m_logicalScaleY * m_userScaleY;
1680 }
1681
1682 void wxDCBase::SetMapMode( int mode )
1683 {
1684     switch (mode)
1685     {
1686         case wxMM_TWIPS:
1687           SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
1688           break;
1689         case wxMM_POINTS:
1690           SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
1691           break;
1692         case wxMM_METRIC:
1693           SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
1694           break;
1695         case wxMM_LOMETRIC:
1696           SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
1697           break;
1698         default:
1699         case wxMM_TEXT:
1700           SetLogicalScale( 1.0, 1.0 );
1701           break;
1702     }
1703     m_mappingMode = mode;
1704 }
1705
1706 void wxDCBase::SetUserScale( double x, double y )
1707 {
1708     // allow negative ? -> no
1709     m_userScaleX = x;
1710     m_userScaleY = y;
1711     ComputeScaleAndOrigin();
1712 }
1713
1714 void wxDCBase::SetLogicalScale( double x, double y )
1715 {
1716     // allow negative ?
1717     m_logicalScaleX = x;
1718     m_logicalScaleY = y;
1719     ComputeScaleAndOrigin();
1720 }
1721
1722 void wxDCBase::SetLogicalOrigin( wxCoord x, wxCoord y )
1723 {
1724     m_logicalOriginX = x * m_signX;
1725     m_logicalOriginY = y * m_signY;
1726     ComputeScaleAndOrigin();
1727 }
1728
1729 void wxDCBase::SetDeviceOrigin( wxCoord x, wxCoord y )
1730 {
1731     m_deviceOriginX = x;
1732     m_deviceOriginY = y;
1733     ComputeScaleAndOrigin();
1734 }
1735
1736 void wxDCBase::SetDeviceLocalOrigin( wxCoord x, wxCoord y )
1737 {
1738     m_deviceLocalOriginX = x;
1739     m_deviceLocalOriginY = y;
1740     ComputeScaleAndOrigin();
1741 }
1742
1743 void wxDCBase::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
1744 {
1745     // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
1746     // wxWidgets 2.9: no longer override it
1747     m_signX = (xLeftRight ?  1 : -1);
1748     m_signY = (yBottomUp  ? -1 :  1);
1749     ComputeScaleAndOrigin();
1750 }
1751
1752 // ----------------------------------------------------------------------------
1753 // special symbols
1754 // ----------------------------------------------------------------------------
1755
1756 void wxDCBase::DoDrawCheckMark(wxCoord x1, wxCoord y1,
1757                                wxCoord width, wxCoord height)
1758 {
1759     wxCHECK_RET( Ok(), wxT("invalid window dc") );
1760
1761     wxCoord x2 = x1 + width,
1762             y2 = y1 + height;
1763
1764     // the pen width is calibrated to give 3 for width == height == 10
1765     wxDCPenChanger pen((wxDC&)*this,
1766                         wxPen(GetTextForeground(), (width + height + 1)/7));
1767
1768     // we're drawing a scaled version of wx/generic/tick.xpm here
1769     wxCoord x3 = x1 + (4*width) / 10,   // x of the tick bottom
1770             y3 = y1 + height / 2;       // y of the left tick branch
1771     DoDrawLine(x1, y3, x3, y2);
1772     DoDrawLine(x3, y2, x2, y1);
1773
1774     CalcBoundingBox(x1, y1);
1775     CalcBoundingBox(x2, y2);
1776 }
1777
1778 // ----------------------------------------------------------------------------
1779 // stubs for functions not implemented in all ports
1780 // ----------------------------------------------------------------------------
1781
1782 bool
1783 wxDCBase::DoStretchBlit(wxCoord xdest, wxCoord ydest,
1784                         wxCoord dstWidth, wxCoord dstHeight,
1785                         wxDC *source,
1786                         wxCoord xsrc, wxCoord ysrc,
1787                         wxCoord srcWidth, wxCoord srcHeight,
1788                         int rop,
1789                         bool useMask,
1790                         wxCoord xsrcMask,
1791                         wxCoord ysrcMask)
1792 {
1793     wxCHECK_MSG( srcWidth && srcHeight && dstWidth && dstHeight, false,
1794                  _T("invalid blit size") );
1795
1796     // emulate the stretching by modifying the DC scale
1797     double xscale = (double)srcWidth/dstWidth,
1798            yscale = (double)srcHeight/dstHeight;
1799
1800     double xscaleOld, yscaleOld;
1801     GetUserScale(&xscaleOld, &yscaleOld);
1802     SetUserScale(xscaleOld/xscale, yscaleOld/yscale);
1803
1804     bool rc = DoBlit(wxCoord(xdest*xscale), wxCoord(ydest*yscale),
1805                      wxCoord(dstWidth*xscale), wxCoord(dstHeight*yscale),
1806                      source,
1807                      xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
1808
1809     SetUserScale(xscaleOld, yscaleOld);
1810
1811     return rc;
1812 }
1813
1814 // ----------------------------------------------------------------------------
1815 // line/polygons
1816 // ----------------------------------------------------------------------------
1817
1818 void wxDCBase::DrawLines(const wxPointList *list, wxCoord xoffset, wxCoord yoffset)
1819 {
1820     unsigned int n = list->GetCount();
1821     wxPoint *points = new wxPoint[n];
1822
1823     unsigned int i = 0;
1824     wxPointList::compatibility_iterator node;
1825     for ( node = list->GetFirst(); node; node = node->GetNext(), i++ )
1826     {
1827         wxPoint *point = node->GetData();
1828         points[i].x = point->x;
1829         points[i].y = point->y;
1830     }
1831
1832     DoDrawLines(n, points, xoffset, yoffset);
1833
1834     delete [] points;
1835 }
1836
1837 #if WXWIN_COMPATIBILITY_2_8
1838 void wxDCBase::DrawLines(const wxList *list, wxCoord xoffset, wxCoord yoffset )
1839 {
1840     unsigned int n = list->GetCount();
1841     wxPoint *points = new wxPoint[n];
1842
1843     unsigned int i = 0;
1844     wxObjectList::compatibility_iterator node;
1845     for ( node = list->GetFirst(); node; node = node->GetNext(), i++ )
1846     {
1847         wxPoint *point = (wxPoint*) node->GetData();
1848         points[i].x = point->x;
1849         points[i].y = point->y;
1850     }
1851
1852     DoDrawLines(n, points, xoffset, yoffset);
1853
1854     delete [] points;
1855 }
1856 #endif  // WXWIN_COMPATIBILITY_2_8
1857
1858
1859 void wxDCBase::DrawPolygon(const wxPointList *list,
1860                            wxCoord xoffset, wxCoord yoffset,
1861                            int fillStyle)
1862 {
1863     unsigned int n = list->GetCount();
1864     wxPoint *points = new wxPoint[n];
1865
1866     unsigned int i = 0;
1867     wxPointList::compatibility_iterator node;
1868     for ( node = list->GetFirst(); node; node = node->GetNext(), i++ )
1869     {
1870         wxPoint *point = node->GetData();
1871         points[i].x = point->x;
1872         points[i].y = point->y;
1873     }
1874
1875     DoDrawPolygon(n, points, xoffset, yoffset, fillStyle);
1876
1877     delete [] points;
1878 }
1879
1880
1881 #if WXWIN_COMPATIBILITY_2_8
1882 void wxDCBase::DrawPolygon(const wxList *list,
1883                      wxCoord xoffset, wxCoord yoffset,
1884                      int fillStyle )
1885 {
1886     unsigned int n = list->GetCount();
1887     wxPoint *points = new wxPoint[n];
1888
1889     unsigned int i = 0;
1890     wxObjectList::compatibility_iterator node;
1891     for ( node = list->GetFirst(); node; node = node->GetNext(), i++ )
1892     {
1893         wxPoint *point = (wxPoint*) node->GetData();
1894         points[i].x = point->x;
1895         points[i].y = point->y;
1896     }
1897
1898     DoDrawPolygon(n, points, xoffset, yoffset, fillStyle);
1899
1900     delete [] points;
1901 }
1902 #endif  // WXWIN_COMPATIBILITY_2_8
1903
1904 void
1905 wxDCBase::DoDrawPolyPolygon(int n,
1906                             int count[],
1907                             wxPoint points[],
1908                             wxCoord xoffset, wxCoord yoffset,
1909                             int fillStyle)
1910 {
1911     if ( n == 1 )
1912     {
1913         DoDrawPolygon(count[0], points, xoffset, yoffset, fillStyle);
1914         return;
1915     }
1916
1917     int      i, j, lastOfs;
1918     wxPoint* pts;
1919     wxPen    pen;
1920
1921     for (i = j = lastOfs = 0; i < n; i++)
1922     {
1923         lastOfs = j;
1924         j      += count[i];
1925     }
1926     pts = new wxPoint[j+n-1];
1927     for (i = 0; i < j; i++)
1928         pts[i] = points[i];
1929     for (i = 2; i <= n; i++)
1930     {
1931         lastOfs -= count[n-i];
1932         pts[j++] = pts[lastOfs];
1933     }
1934
1935     pen = GetPen();
1936     SetPen(wxPen(*wxBLACK, 0, wxTRANSPARENT));
1937     DoDrawPolygon(j, pts, xoffset, yoffset, fillStyle);
1938     SetPen(pen);
1939     for (i = j = 0; i < n; i++)
1940     {
1941         DoDrawLines(count[i], pts+j, xoffset, yoffset);
1942         j += count[i];
1943     }
1944     delete[] pts;
1945 }
1946
1947 // ----------------------------------------------------------------------------
1948 // splines
1949 // ----------------------------------------------------------------------------
1950
1951 #if wxUSE_SPLINES
1952
1953 void wxDCBase::DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3)
1954 {
1955     wxPointList point_list;
1956
1957     wxPoint *point1 = new wxPoint;
1958     point1->x = x1; point1->y = y1;
1959     point_list.Append( point1 );
1960
1961     wxPoint *point2 = new wxPoint;
1962     point2->x = x2; point2->y = y2;
1963     point_list.Append( point2 );
1964
1965     wxPoint *point3 = new wxPoint;
1966     point3->x = x3; point3->y = y3;
1967     point_list.Append( point3 );
1968
1969     DrawSpline(&point_list);
1970
1971     for( wxPointList::compatibility_iterator node = point_list.GetFirst(); node; node = node->GetNext() )
1972     {
1973         wxPoint *p = node->GetData();
1974         delete p;
1975     }
1976 }
1977
1978 void wxDCBase::DrawSpline(int n, wxPoint points[])
1979 {
1980     wxPointList list;
1981     for (int i =0; i < n; i++)
1982         list.Append( &points[i] );
1983
1984     DrawSpline(&list);
1985 }
1986
1987 // ----------------------------------- spline code ----------------------------------------
1988
1989 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
1990                          double a3, double b3, double a4, double b4);
1991 void wx_clear_stack();
1992 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
1993         double *y3, double *x4, double *y4);
1994 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
1995           double x4, double y4);
1996 static bool wx_spline_add_point(double x, double y);
1997 static void wx_spline_draw_point_array(wxDCBase *dc);
1998
1999 wxPointList wx_spline_point_list;
2000
2001 #define                half(z1, z2)        ((z1+z2)/2.0)
2002 #define                THRESHOLD        5
2003
2004 /* iterative version */
2005
2006 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
2007                  double b4)
2008 {
2009     register double  xmid, ymid;
2010     double           x1, y1, x2, y2, x3, y3, x4, y4;
2011
2012     wx_clear_stack();
2013     wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
2014
2015     while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
2016         xmid = (double)half(x2, x3);
2017         ymid = (double)half(y2, y3);
2018         if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
2019             fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
2020             wx_spline_add_point( x1, y1 );
2021             wx_spline_add_point( xmid, ymid );
2022         } else {
2023             wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
2024                  (double)half(x3, x4), (double)half(y3, y4), x4, y4);
2025             wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
2026                  (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
2027         }
2028     }
2029 }
2030
2031 /* utilities used by spline drawing routines */
2032
2033 typedef struct wx_spline_stack_struct {
2034     double           x1, y1, x2, y2, x3, y3, x4, y4;
2035 } Stack;
2036
2037 #define         SPLINE_STACK_DEPTH             20
2038 static Stack    wx_spline_stack[SPLINE_STACK_DEPTH];
2039 static Stack   *wx_stack_top;
2040 static int      wx_stack_count;
2041
2042 void wx_clear_stack()
2043 {
2044     wx_stack_top = wx_spline_stack;
2045     wx_stack_count = 0;
2046 }
2047
2048 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
2049 {
2050     wx_stack_top->x1 = x1;
2051     wx_stack_top->y1 = y1;
2052     wx_stack_top->x2 = x2;
2053     wx_stack_top->y2 = y2;
2054     wx_stack_top->x3 = x3;
2055     wx_stack_top->y3 = y3;
2056     wx_stack_top->x4 = x4;
2057     wx_stack_top->y4 = y4;
2058     wx_stack_top++;
2059     wx_stack_count++;
2060 }
2061
2062 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
2063                   double *x3, double *y3, double *x4, double *y4)
2064 {
2065     if (wx_stack_count == 0)
2066         return (0);
2067     wx_stack_top--;
2068     wx_stack_count--;
2069     *x1 = wx_stack_top->x1;
2070     *y1 = wx_stack_top->y1;
2071     *x2 = wx_stack_top->x2;
2072     *y2 = wx_stack_top->y2;
2073     *x3 = wx_stack_top->x3;
2074     *y3 = wx_stack_top->y3;
2075     *x4 = wx_stack_top->x4;
2076     *y4 = wx_stack_top->y4;
2077     return (1);
2078 }
2079
2080 static bool wx_spline_add_point(double x, double y)
2081 {
2082     wxPoint *point = new wxPoint( wxRound(x), wxRound(y) );
2083     wx_spline_point_list.Append( point );
2084     return true;
2085 }
2086
2087 static void wx_spline_draw_point_array(wxDCBase *dc)
2088 {
2089     dc->DrawLines(&wx_spline_point_list, 0, 0 );
2090     wxPointList::compatibility_iterator node = wx_spline_point_list.GetFirst();
2091     while (node)
2092     {
2093         wxPoint *point = node->GetData();
2094         delete point;
2095         wx_spline_point_list.Erase(node);
2096         node = wx_spline_point_list.GetFirst();
2097     }
2098 }
2099
2100 #if WXWIN_COMPATIBILITY_2_8
2101 void wxDCBase::DrawSpline(const wxList *points)
2102 {
2103     wxPointList list;
2104     wxObjectList::compatibility_iterator node = points->GetFirst();
2105     while (node)
2106     {
2107         list.Append( (wxPoint*) node->GetData() );
2108         node = node->GetNext();
2109     }
2110     DoDrawSpline( &list );
2111 }
2112 #endif  // WXWIN_COMPATIBILITY_2_8
2113
2114 void wxDCBase::DoDrawSpline( const wxPointList *points )
2115 {
2116     wxCHECK_RET( Ok(), wxT("invalid window dc") );
2117
2118     wxPoint *p;
2119     double           cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
2120     double           x1, y1, x2, y2;
2121
2122     wxPointList::compatibility_iterator node = points->GetFirst();
2123     if (!node)
2124         // empty list
2125         return;
2126
2127     p = node->GetData();
2128
2129     x1 = p->x;
2130     y1 = p->y;
2131
2132     node = node->GetNext();
2133     p = node->GetData();
2134
2135     x2 = p->x;
2136     y2 = p->y;
2137     cx1 = (double)((x1 + x2) / 2);
2138     cy1 = (double)((y1 + y2) / 2);
2139     cx2 = (double)((cx1 + x2) / 2);
2140     cy2 = (double)((cy1 + y2) / 2);
2141
2142     wx_spline_add_point(x1, y1);
2143
2144     while ((node = node->GetNext())
2145 #if !wxUSE_STL
2146            != NULL
2147 #endif // !wxUSE_STL
2148           )
2149     {
2150         p = node->GetData();
2151         x1 = x2;
2152         y1 = y2;
2153         x2 = p->x;
2154         y2 = p->y;
2155         cx4 = (double)(x1 + x2) / 2;
2156         cy4 = (double)(y1 + y2) / 2;
2157         cx3 = (double)(x1 + cx4) / 2;
2158         cy3 = (double)(y1 + cy4) / 2;
2159
2160         wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
2161
2162         cx1 = cx4;
2163         cy1 = cy4;
2164         cx2 = (double)(cx1 + x2) / 2;
2165         cy2 = (double)(cy1 + y2) / 2;
2166     }
2167
2168     wx_spline_add_point( cx1, cy1 );
2169     wx_spline_add_point( x2, y2 );
2170
2171     wx_spline_draw_point_array( this );
2172 }
2173
2174 #endif // wxUSE_SPLINES
2175
2176 // ----------------------------------------------------------------------------
2177 // Partial Text Extents
2178 // ----------------------------------------------------------------------------
2179
2180
2181 // Each element of the widths array will be the width of the string up to and
2182 // including the corresponding character in text.  This is the generic
2183 // implementation, the port-specific classes should do this with native APIs
2184 // if available and if faster.  Note: pango_layout_index_to_pos is much slower
2185 // than calling GetTextExtent!!
2186
2187 #define FWC_SIZE 256
2188
2189 class FontWidthCache
2190 {
2191 public:
2192     FontWidthCache() : m_scaleX(1), m_widths(NULL) { }
2193     ~FontWidthCache() { delete []m_widths; }
2194
2195     void Reset()
2196     {
2197         if (!m_widths)
2198             m_widths = new int[FWC_SIZE];
2199
2200         memset(m_widths, 0, sizeof(int)*FWC_SIZE);
2201     }
2202
2203     wxFont m_font;
2204     double m_scaleX;
2205     int *m_widths;
2206 };
2207
2208 static FontWidthCache s_fontWidthCache;
2209
2210 bool wxDCBase::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
2211 {
2212     int totalWidth = 0;
2213
2214     const size_t len = text.length();
2215     widths.Empty();
2216     widths.Add(0, len);
2217
2218     // reset the cache if font or horizontal scale have changed
2219     if ( !s_fontWidthCache.m_widths ||
2220          !wxIsSameDouble(s_fontWidthCache.m_scaleX, m_scaleX) ||
2221          (s_fontWidthCache.m_font != GetFont()) )
2222     {
2223         s_fontWidthCache.Reset();
2224         s_fontWidthCache.m_font = GetFont();
2225         s_fontWidthCache.m_scaleX = m_scaleX;
2226     }
2227
2228     // Calculate the position of each character based on the widths of
2229     // the previous characters
2230     int w, h;
2231     for ( size_t i = 0; i < len; i++ )
2232     {
2233         const wxChar c = text[i];
2234         unsigned int c_int = (unsigned int)c;
2235
2236         if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
2237         {
2238             w = s_fontWidthCache.m_widths[c_int];
2239         }
2240         else
2241         {
2242             GetTextExtent(c, &w, &h);
2243             if (c_int < FWC_SIZE)
2244                 s_fontWidthCache.m_widths[c_int] = w;
2245         }
2246
2247         totalWidth += w;
2248         widths[i] = totalWidth;
2249     }
2250
2251     return true;
2252 }
2253
2254
2255 // ----------------------------------------------------------------------------
2256 // enhanced text drawing
2257 // ----------------------------------------------------------------------------
2258
2259 void wxDCBase::GetMultiLineTextExtent(const wxString& text,
2260                                       wxCoord *x,
2261                                       wxCoord *y,
2262                                       wxCoord *h,
2263                                       const wxFont *font) const
2264 {
2265     wxCoord widthTextMax = 0, widthLine,
2266             heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
2267
2268     wxString curLine;
2269     for ( wxString::const_iterator pc = text.begin(); ; ++pc )
2270     {
2271         if ( pc == text.end() || *pc == _T('\n') )
2272         {
2273             if ( curLine.empty() )
2274             {
2275                 // we can't use GetTextExtent - it will return 0 for both width
2276                 // and height and an empty line should count in height
2277                 // calculation
2278
2279                 // assume that this line has the same height as the previous
2280                 // one
2281                 if ( !heightLineDefault )
2282                     heightLineDefault = heightLine;
2283
2284                 if ( !heightLineDefault )
2285                 {
2286                     // but we don't know it yet - choose something reasonable
2287                     GetTextExtent(_T("W"), NULL, &heightLineDefault,
2288                                   NULL, NULL, font);
2289                 }
2290
2291                 heightTextTotal += heightLineDefault;
2292             }
2293             else
2294             {
2295                 GetTextExtent(curLine, &widthLine, &heightLine,
2296                               NULL, NULL, font);
2297                 if ( widthLine > widthTextMax )
2298                     widthTextMax = widthLine;
2299                 heightTextTotal += heightLine;
2300             }
2301
2302             if ( pc == text.end() )
2303             {
2304                break;
2305             }
2306             else // '\n'
2307             {
2308                curLine.clear();
2309             }
2310         }
2311         else
2312         {
2313             curLine += *pc;
2314         }
2315     }
2316
2317     if ( x )
2318         *x = widthTextMax;
2319     if ( y )
2320         *y = heightTextTotal;
2321     if ( h )
2322         *h = heightLine;
2323 }
2324
2325 void wxDCBase::DrawLabel(const wxString& text,
2326                          const wxBitmap& bitmap,
2327                          const wxRect& rect,
2328                          int alignment,
2329                          int indexAccel,
2330                          wxRect *rectBounding)
2331 {
2332     // find the text position
2333     wxCoord widthText, heightText, heightLine;
2334     GetMultiLineTextExtent(text, &widthText, &heightText, &heightLine);
2335
2336     wxCoord width, height;
2337     if ( bitmap.Ok() )
2338     {
2339         width = widthText + bitmap.GetWidth();
2340         height = bitmap.GetHeight();
2341     }
2342     else // no bitmap
2343     {
2344         width = widthText;
2345         height = heightText;
2346     }
2347
2348     wxCoord x, y;
2349     if ( alignment & wxALIGN_RIGHT )
2350     {
2351         x = rect.GetRight() - width;
2352     }
2353     else if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
2354     {
2355         x = (rect.GetLeft() + rect.GetRight() + 1 - width) / 2;
2356     }
2357     else // alignment & wxALIGN_LEFT
2358     {
2359         x = rect.GetLeft();
2360     }
2361
2362     if ( alignment & wxALIGN_BOTTOM )
2363     {
2364         y = rect.GetBottom() - height;
2365     }
2366     else if ( alignment & wxALIGN_CENTRE_VERTICAL )
2367     {
2368         y = (rect.GetTop() + rect.GetBottom() + 1 - height) / 2;
2369     }
2370     else // alignment & wxALIGN_TOP
2371     {
2372         y = rect.GetTop();
2373     }
2374
2375     // draw the bitmap first
2376     wxCoord x0 = x,
2377             y0 = y,
2378             width0 = width;
2379     if ( bitmap.Ok() )
2380     {
2381         DrawBitmap(bitmap, x, y, true /* use mask */);
2382
2383         wxCoord offset = bitmap.GetWidth() + 4;
2384         x += offset;
2385         width -= offset;
2386
2387         y += (height - heightText) / 2;
2388     }
2389
2390     // we will draw the underscore under the accel char later
2391     wxCoord startUnderscore = 0,
2392             endUnderscore = 0,
2393             yUnderscore = 0;
2394
2395     // split the string into lines and draw each of them separately
2396     wxString curLine;
2397     for ( wxString::const_iterator pc = text.begin(); ; ++pc )
2398     {
2399         if ( pc == text.end() || *pc == _T('\n') )
2400         {
2401             int xRealStart = x; // init it here to avoid compielr warnings
2402
2403             if ( !curLine.empty() )
2404             {
2405                 // NB: can't test for !(alignment & wxALIGN_LEFT) because
2406                 //     wxALIGN_LEFT is 0
2407                 if ( alignment & (wxALIGN_RIGHT | wxALIGN_CENTRE_HORIZONTAL) )
2408                 {
2409                     wxCoord widthLine;
2410                     GetTextExtent(curLine, &widthLine, NULL);
2411
2412                     if ( alignment & wxALIGN_RIGHT )
2413                     {
2414                         xRealStart += width - widthLine;
2415                     }
2416                     else // if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
2417                     {
2418                         xRealStart += (width - widthLine) / 2;
2419                     }
2420                 }
2421                 //else: left aligned, nothing to do
2422
2423                 DrawText(curLine, xRealStart, y);
2424             }
2425
2426             y += heightLine;
2427
2428             // do we have underscore in this line? we can check yUnderscore
2429             // because it is set below to just y + heightLine if we do
2430             if ( y == yUnderscore )
2431             {
2432                 // adjust the horz positions to account for the shift
2433                 startUnderscore += xRealStart;
2434                 endUnderscore += xRealStart;
2435             }
2436
2437             if ( pc == text.end() )
2438                 break;
2439
2440             curLine.clear();
2441         }
2442         else // not end of line
2443         {
2444             if ( pc - text.begin() == indexAccel )
2445             {
2446                 // remeber to draw underscore here
2447                 GetTextExtent(curLine, &startUnderscore, NULL);
2448                 curLine += *pc;
2449                 GetTextExtent(curLine, &endUnderscore, NULL);
2450
2451                 yUnderscore = y + heightLine;
2452             }
2453             else
2454             {
2455                 curLine += *pc;
2456             }
2457         }
2458     }
2459
2460     // draw the underscore if found
2461     if ( startUnderscore != endUnderscore )
2462     {
2463         // it should be of the same colour as text
2464         SetPen(wxPen(GetTextForeground(), 0, wxSOLID));
2465
2466         yUnderscore--;
2467
2468         DrawLine(startUnderscore, yUnderscore, endUnderscore, yUnderscore);
2469     }
2470
2471     // return bounding rect if requested
2472     if ( rectBounding )
2473     {
2474         *rectBounding = wxRect(x, y - heightText, widthText, heightText);
2475     }
2476
2477     CalcBoundingBox(x0, y0);
2478     CalcBoundingBox(x0 + width0, y0 + height);
2479 }
2480
2481
2482 void wxDCBase::DoGradientFillLinear(const wxRect& rect,
2483                                     const wxColour& initialColour,
2484                                     const wxColour& destColour,
2485                                     wxDirection nDirection)
2486 {
2487     // save old pen
2488     wxPen oldPen = m_pen;
2489     wxBrush oldBrush = m_brush;
2490
2491     wxUint8 nR1 = initialColour.Red();
2492     wxUint8 nG1 = initialColour.Green();
2493     wxUint8 nB1 = initialColour.Blue();
2494     wxUint8 nR2 = destColour.Red();
2495     wxUint8 nG2 = destColour.Green();
2496     wxUint8 nB2 = destColour.Blue();
2497     wxUint8 nR, nG, nB;
2498
2499     if ( nDirection == wxEAST || nDirection == wxWEST )
2500     {
2501         wxInt32 x = rect.GetWidth();
2502         wxInt32 w = x;              // width of area to shade
2503         wxInt32 xDelta = w/256;     // height of one shade bend
2504         if (xDelta < 1)
2505             xDelta = 1;
2506
2507         while (x >= xDelta)
2508         {
2509             x -= xDelta;
2510             if (nR1 > nR2)
2511                 nR = nR1 - (nR1-nR2)*(w-x)/w;
2512             else
2513                 nR = nR1 + (nR2-nR1)*(w-x)/w;
2514
2515             if (nG1 > nG2)
2516                 nG = nG1 - (nG1-nG2)*(w-x)/w;
2517             else
2518                 nG = nG1 + (nG2-nG1)*(w-x)/w;
2519
2520             if (nB1 > nB2)
2521                 nB = nB1 - (nB1-nB2)*(w-x)/w;
2522             else
2523                 nB = nB1 + (nB2-nB1)*(w-x)/w;
2524
2525             wxColour colour(nR,nG,nB);
2526             SetPen(wxPen(colour, 1, wxSOLID));
2527             SetBrush(wxBrush(colour));
2528             if(nDirection == wxEAST)
2529                 DrawRectangle(rect.GetRight()-x-xDelta+1, rect.GetTop(),
2530                         xDelta, rect.GetHeight());
2531             else //nDirection == wxWEST
2532                 DrawRectangle(rect.GetLeft()+x, rect.GetTop(),
2533                         xDelta, rect.GetHeight());
2534         }
2535     }
2536     else  // nDirection == wxNORTH || nDirection == wxSOUTH
2537     {
2538         wxInt32 y = rect.GetHeight();
2539         wxInt32 w = y;              // height of area to shade
2540         wxInt32 yDelta = w/255;     // height of one shade bend
2541         if (yDelta < 1)
2542             yDelta = 1;
2543
2544         while (y > 0)
2545         {
2546             y -= yDelta;
2547             if (nR1 > nR2)
2548                 nR = nR1 - (nR1-nR2)*(w-y)/w;
2549             else
2550                 nR = nR1 + (nR2-nR1)*(w-y)/w;
2551
2552             if (nG1 > nG2)
2553                 nG = nG1 - (nG1-nG2)*(w-y)/w;
2554             else
2555                 nG = nG1 + (nG2-nG1)*(w-y)/w;
2556
2557             if (nB1 > nB2)
2558                 nB = nB1 - (nB1-nB2)*(w-y)/w;
2559             else
2560                 nB = nB1 + (nB2-nB1)*(w-y)/w;
2561
2562             wxColour colour(nR,nG,nB);
2563             SetPen(wxPen(colour, 1, wxSOLID));
2564             SetBrush(wxBrush(colour));
2565             if(nDirection == wxNORTH)
2566                 DrawRectangle(rect.GetLeft(), rect.GetTop()+y,
2567                         rect.GetWidth(), yDelta);
2568             else //nDirection == wxSOUTH
2569                 DrawRectangle(rect.GetLeft(), rect.GetBottom()-y-yDelta+1,
2570                         rect.GetWidth(), yDelta);
2571         }
2572     }
2573
2574     SetPen(oldPen);
2575     SetBrush(oldBrush);
2576 }
2577
2578 void wxDCBase::DoGradientFillConcentric(const wxRect& rect,
2579                                       const wxColour& initialColour,
2580                                       const wxColour& destColour,
2581                                       const wxPoint& circleCenter)
2582 {
2583     //save the old pen color
2584     wxColour oldPenColour = m_pen.GetColour();
2585
2586     wxUint8 nR1 = destColour.Red();
2587     wxUint8 nG1 = destColour.Green();
2588     wxUint8 nB1 = destColour.Blue();
2589     wxUint8 nR2 = initialColour.Red();
2590     wxUint8 nG2 = initialColour.Green();
2591     wxUint8 nB2 = initialColour.Blue();
2592     wxUint8 nR, nG, nB;
2593
2594
2595     //Radius
2596     wxInt32 cx = rect.GetWidth() / 2;
2597     wxInt32 cy = rect.GetHeight() / 2;
2598     wxInt32 nRadius;
2599     if (cx < cy)
2600         nRadius = cx;
2601     else
2602         nRadius = cy;
2603
2604     //Offset of circle
2605     wxInt32 nCircleOffX = circleCenter.x - (rect.GetWidth() / 2);
2606     wxInt32 nCircleOffY = circleCenter.y - (rect.GetHeight() / 2);
2607
2608     for ( wxInt32 x = 0; x < rect.GetWidth(); x++ )
2609     {
2610         for ( wxInt32 y = 0; y < rect.GetHeight(); y++ )
2611         {
2612             //get color difference
2613             wxInt32 nGradient = ((nRadius -
2614                                   (wxInt32)sqrt(
2615                                     pow((double)(x - cx - nCircleOffX), 2) +
2616                                     pow((double)(y - cy - nCircleOffY), 2)
2617                                   )) * 100) / nRadius;
2618
2619             //normalize Gradient
2620             if (nGradient < 0 )
2621                 nGradient = 0;
2622
2623             //get dest colors
2624             nR = (wxUint8)(nR1 + ((nR2 - nR1) * nGradient / 100));
2625             nG = (wxUint8)(nG1 + ((nG2 - nG1) * nGradient / 100));
2626             nB = (wxUint8)(nB1 + ((nB2 - nB1) * nGradient / 100));
2627
2628             //set the pixel
2629             m_pen.SetColour(wxColour(nR,nG,nB));
2630             DrawPoint(wxPoint(x + rect.GetLeft(), y + rect.GetTop()));
2631         }
2632     }
2633     //return old pen color
2634     m_pen.SetColour(oldPenColour);
2635 }
2636
2637 /*
2638 Notes for wxWidgets DrawEllipticArcRot(...)
2639
2640 wxDCBase::DrawEllipticArcRot(...) draws a rotated elliptic arc or an ellipse.
2641 It uses wxDCBase::CalculateEllipticPoints(...) and wxDCBase::Rotate(...),
2642 which are also new.
2643
2644 All methods are generic, so they can be implemented in wxDCBase.
2645 DoDrawEllipticArcRot(...) is virtual, so it can be called from deeper
2646 methods like (WinCE) wxDC::DoDrawArc(...).
2647
2648 CalculateEllipticPoints(...) fills a given list of wxPoints with some points
2649 of an elliptic arc. The algorithm is pixel-based: In every row (in flat
2650 parts) or every column (in steep parts) only one pixel is calculated.
2651 Trigonometric calculation (sin, cos, tan, atan) is only done if the
2652 starting angle is not equal to the ending angle. The calculation of the
2653 pixels is done using simple arithmetic only and should perform not too
2654 bad even on devices without floating point processor. I didn't test this yet.
2655
2656 Rotate(...) rotates a list of point pixel-based, you will see rounding errors.
2657 For instance: an ellipse rotated 180 degrees is drawn
2658 slightly different from the original.
2659
2660 The points are then moved to an array and used to draw a polyline and/or polygon
2661 (with center added, the pie).
2662 The result looks quite similar to the native ellipse, only e few pixels differ.
2663
2664 The performance on a desktop system (Athlon 1800, WinXP) is about 7 times
2665 slower as DrawEllipse(...), which calls the native API.
2666 An rotated ellipse outside the clipping region takes nearly the same time,
2667 while an native ellipse outside takes nearly no time to draw.
2668
2669 If you draw an arc with this new method, you will see the starting and ending angles
2670 are calculated properly.
2671 If you use DrawEllipticArc(...), you will see they are only correct for circles
2672 and not properly calculated for ellipses.
2673
2674 Peter Lenhard
2675 p.lenhard@t-online.de
2676 */
2677
2678 #ifdef __WXWINCE__
2679 void wxDCBase::DoDrawEllipticArcRot( wxCoord x, wxCoord y,
2680                                      wxCoord w, wxCoord h,
2681                                      double sa, double ea, double angle )
2682 {
2683     wxPointList list;
2684
2685     CalculateEllipticPoints( &list, x, y, w, h, sa, ea );
2686     Rotate( &list, angle, wxPoint( x+w/2, y+h/2 ) );
2687
2688     // Add center (for polygon/pie)
2689     list.Append( new wxPoint( x+w/2, y+h/2 ) );
2690
2691     // copy list into array and delete list elements
2692     int n = list.GetCount();
2693     wxPoint *points = new wxPoint[n];
2694     int i = 0;
2695     wxPointList::compatibility_iterator node;
2696     for ( node = list.GetFirst(); node; node = node->GetNext(), i++ )
2697     {
2698         wxPoint *point = node->GetData();
2699         points[i].x = point->x;
2700         points[i].y = point->y;
2701         delete point;
2702     }
2703
2704     // first draw the pie without pen, if necessary
2705     if( GetBrush() != *wxTRANSPARENT_BRUSH )
2706     {
2707         wxPen tempPen( GetPen() );
2708         SetPen( *wxTRANSPARENT_PEN );
2709         DoDrawPolygon( n, points, 0, 0 );
2710         SetPen( tempPen );
2711     }
2712
2713     // then draw the arc without brush, if necessary
2714     if( GetPen() != *wxTRANSPARENT_PEN )
2715     {
2716         // without center
2717         DoDrawLines( n-1, points, 0, 0 );
2718     }
2719
2720     delete [] points;
2721
2722 } // DrawEllipticArcRot
2723
2724 void wxDCBase::Rotate( wxPointList* points, double angle, wxPoint center )
2725 {
2726     if( angle != 0.0 )
2727     {
2728         double pi(M_PI);
2729         double dSinA = -sin(angle*2.0*pi/360.0);
2730         double dCosA = cos(angle*2.0*pi/360.0);
2731         wxPointList::compatibility_iterator node;
2732         for ( node = points->GetFirst(); node; node = node->GetNext() )
2733         {
2734             wxPoint* point = node->GetData();
2735
2736             // transform coordinates, if necessary
2737             if( center.x ) point->x -= center.x;
2738             if( center.y ) point->y -= center.y;
2739
2740             // calculate rotation, rounding simply by implicit cast to integer
2741             int xTemp = point->x * dCosA - point->y * dSinA;
2742             point->y = point->x * dSinA + point->y * dCosA;
2743             point->x = xTemp;
2744
2745             // back transform coordinates, if necessary
2746             if( center.x ) point->x += center.x;
2747             if( center.y ) point->y += center.y;
2748         }
2749     }
2750 }
2751
2752 void wxDCBase::CalculateEllipticPoints( wxPointList* points,
2753                                         wxCoord xStart, wxCoord yStart,
2754                                         wxCoord w, wxCoord h,
2755                                         double sa, double ea )
2756 {
2757     double pi = M_PI;
2758     double sar = 0;
2759     double ear = 0;
2760     int xsa = 0;
2761     int ysa = 0;
2762     int xea = 0;
2763     int yea = 0;
2764     int sq = 0;
2765     int eq = 0;
2766     bool bUseAngles = false;
2767     if( w<0 ) w = -w;
2768     if( h<0 ) h = -h;
2769     // half-axes
2770     wxCoord a = w/2;
2771     wxCoord b = h/2;
2772     // decrement 1 pixel if ellipse is smaller than 2*a, 2*b
2773     int decrX = 0;
2774     if( 2*a == w ) decrX = 1;
2775     int decrY = 0;
2776     if( 2*b == h ) decrY = 1;
2777     // center
2778     wxCoord xCenter = xStart + a;
2779     wxCoord yCenter = yStart + b;
2780     // calculate data for start and end, if necessary
2781     if( sa != ea )
2782     {
2783         bUseAngles = true;
2784         // normalisation of angles
2785         while( sa<0 ) sa += 360;
2786         while( ea<0 ) ea += 360;
2787         while( sa>=360 ) sa -= 360;
2788         while( ea>=360 ) ea -= 360;
2789         // calculate quadrant numbers
2790         if( sa > 270 ) sq = 3;
2791         else if( sa > 180 ) sq = 2;
2792         else if( sa > 90 ) sq = 1;
2793         if( ea > 270 ) eq = 3;
2794         else if( ea > 180 ) eq = 2;
2795         else if( ea > 90 ) eq = 1;
2796         sar = sa * pi / 180.0;
2797         ear = ea * pi / 180.0;
2798         // correct angle circle -> ellipse
2799         sar = atan( -a/(double)b * tan( sar ) );
2800         if ( sq == 1 || sq == 2 ) sar += pi;
2801         ear = atan( -a/(double)b * tan( ear ) );
2802         if ( eq == 1 || eq == 2 ) ear += pi;
2803         // coordinates of points
2804         xsa = xCenter + a * cos( sar );
2805         if( sq == 0 || sq == 3 ) xsa -= decrX;
2806         ysa = yCenter + b * sin( sar );
2807         if( sq == 2 || sq == 3 ) ysa -= decrY;
2808         xea = xCenter + a * cos( ear );
2809         if( eq == 0 || eq == 3 ) xea -= decrX;
2810         yea = yCenter + b * sin( ear );
2811         if( eq == 2 || eq == 3 ) yea -= decrY;
2812     } // if iUseAngles
2813     // calculate c1 = b^2, c2 = b^2/a^2 with a = w/2, b = h/2
2814     double c1 = b * b;
2815     double c2 = 2.0 / w;
2816     c2 *= c2;
2817     c2 *= c1;
2818     wxCoord x = 0;
2819     wxCoord y = b;
2820     long x2 = 1;
2821     long y2 = y*y;
2822     long y2_old = 0;
2823     long y_old = 0;
2824     // Lists for quadrant 1 to 4
2825     wxPointList pointsarray[4];
2826     // Calculate points for first quadrant and set in all quadrants
2827     for( x = 0; x <= a; ++x )
2828     {
2829         x2 = x2+x+x-1;
2830         y2_old = y2;
2831         y_old = y;
2832         bool bNewPoint = false;
2833         while( y2 > c1 - c2 * x2 && y > 0 )
2834         {
2835             bNewPoint = true;
2836             y2 = y2-y-y+1;
2837             --y;
2838         }
2839         // old y now to big: set point with old y, old x
2840         if( bNewPoint && x>1)
2841         {
2842             int x1 = x - 1;
2843             // remove points on the same line
2844             pointsarray[0].Insert( new wxPoint( xCenter + x1 - decrX, yCenter - y_old ) );
2845             pointsarray[1].Append( new wxPoint( xCenter - x1, yCenter - y_old ) );
2846             pointsarray[2].Insert( new wxPoint( xCenter - x1, yCenter + y_old - decrY ) );
2847             pointsarray[3].Append( new wxPoint( xCenter + x1 - decrX, yCenter + y_old - decrY ) );
2848         } // set point
2849     } // calculate point
2850
2851     // Starting and/or ending points for the quadrants, first quadrant gets both.
2852     pointsarray[0].Insert( new wxPoint( xCenter + a - decrX, yCenter ) );
2853     pointsarray[0].Append( new wxPoint( xCenter, yCenter - b ) );
2854     pointsarray[1].Append( new wxPoint( xCenter - a, yCenter ) );
2855     pointsarray[2].Append( new wxPoint( xCenter, yCenter + b - decrY ) );
2856     pointsarray[3].Append( new wxPoint( xCenter + a - decrX, yCenter ) );
2857
2858     // copy quadrants in original list
2859     if( bUseAngles )
2860     {
2861         // Copy the right part of the points in the lists
2862         // and delete the wxPoints, because they do not leave this method.
2863         points->Append( new wxPoint( xsa, ysa ) );
2864         int q = sq;
2865         bool bStarted = false;
2866         bool bReady = false;
2867         bool bForceTurn = ( sq == eq && sa > ea );
2868         while( !bReady )
2869         {
2870             wxPointList::compatibility_iterator node;
2871             for( node = pointsarray[q].GetFirst(); node; node = node->GetNext() )
2872             {
2873                 // once: go to starting point in start quadrant
2874                 if( !bStarted &&
2875                     (
2876                       node->GetData()->x < xsa+1 && q <= 1
2877                       ||
2878                       node->GetData()->x > xsa-1 && q >= 2
2879                     )
2880                   )
2881                 {
2882                     bStarted = true;
2883                 }
2884
2885                 // copy point, if not at ending point
2886                 if( bStarted )
2887                 {
2888                     if( q != eq || bForceTurn
2889                         ||
2890                         ( (wxPoint*) node->GetData() )->x > xea+1 && q <= 1
2891                         ||
2892                         ( (wxPoint*) node->GetData() )->x < xea-1 && q >= 2
2893                       )
2894                     {
2895                         // copy point
2896                         wxPoint* pPoint = new wxPoint( *(node->GetData()) );
2897                         points->Append( pPoint );
2898                     }
2899                     else if( q == eq && !bForceTurn || node->GetData()->x == xea)
2900                     {
2901                         bReady = true;
2902                     }
2903                 }
2904             } // for node
2905             ++q;
2906             if( q > 3 ) q = 0;
2907             bForceTurn = false;
2908             bStarted = true;
2909         } // while not bReady
2910         points->Append( new wxPoint( xea, yea ) );
2911
2912         // delete points
2913         for( q = 0; q < 4; ++q )
2914         {
2915             wxPointList::compatibility_iterator node;
2916             for( node = pointsarray[q].GetFirst(); node; node = node->GetNext() )
2917             {
2918                 wxPoint *p = node->GetData();
2919                 delete p;
2920             }
2921         }
2922     }
2923     else
2924     {
2925         wxPointList::compatibility_iterator node;
2926         // copy whole ellipse, wxPoints will be deleted outside
2927         for( node = pointsarray[0].GetFirst(); node; node = node->GetNext() )
2928         {
2929             wxPoint *p = node->GetData();
2930             points->Append( p );
2931         }
2932         for( node = pointsarray[1].GetFirst(); node; node = node->GetNext() )
2933         {
2934             wxPoint *p = node->GetData();
2935             points->Append( p );
2936         }
2937         for( node = pointsarray[2].GetFirst(); node; node = node->GetNext() )
2938         {
2939             wxPoint *p = node->GetData();
2940             points->Append( p );
2941         }
2942         for( node = pointsarray[3].GetFirst(); node; node = node->GetNext() )
2943         {
2944             wxPoint *p = node->GetData();
2945             points->Append( p );
2946         }
2947     } // not iUseAngles
2948 } // CalculateEllipticPoints
2949
2950 #endif // __WXWINCE__
2951
2952 #endif  // wxUSE_NEW_DC