src/cocoa/dc.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/cocoa/dc.mm
   3 // Purpose:     wxDC
   4 // Author:      David Elliott
   5 // Modified by:
   6 // Created:     2003/04/01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 2003 David Elliott
   9 // Licence:     wxWidgets licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13 #ifndef WX_PRECOMP
  14     #include "wx/log.h"
  15     #include "wx/dc.h"
  16 #endif //WX_PRECOMP
  17
  18 #include "wx/cocoa/autorelease.h"
  19 #include "wx/cocoa/string.h"
  20
  21 #import <AppKit/NSBezierPath.h>
  22 #import <AppKit/NSTextStorage.h>
  23 #import <AppKit/NSLayoutManager.h>
  24 #import <AppKit/NSTextContainer.h>
  25 #import <AppKit/NSGraphicsContext.h>
  26 #import <AppKit/NSAffineTransform.h>
  27 #import <AppKit/NSColor.h>
  28 #import <AppKit/NSTypesetter.h>
  29 #import <AppKit/NSImage.h>
  30
  31 #include "wx/listimpl.cpp"
  32 WX_DEFINE_LIST(wxCocoaDCStack);
  33
  34 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
  35 WX_NSTextStorage wxDC::sm_cocoaNSTextStorage = nil;
  36 WX_NSLayoutManager wxDC::sm_cocoaNSLayoutManager = nil;
  37 WX_NSTextContainer wxDC::sm_cocoaNSTextContainer = nil;
  38 wxCocoaDCStack wxDC::sm_cocoaDCStack;
  39
  40 inline void CocoaSetPenForNSBezierPath(wxPen &pen, NSBezierPath *bezpath)
  41 {
  42     [pen.GetNSColor() set];
  43     const float *pattern;
  44     [bezpath setLineDash:pattern count:pen.GetCocoaLineDash(&pattern) phase:0.0];
  45     [bezpath setLineWidth:pen.GetWidth()];
  46     switch(pen.GetJoin())
  47     {
  48     case wxJOIN_BEVEL:
  49         [bezpath setLineJoinStyle:NSBevelLineJoinStyle];
  50         break;
  51     case wxJOIN_ROUND:
  52         [bezpath setLineJoinStyle:NSRoundLineJoinStyle];
  53         break;
  54     case wxJOIN_MITER:
  55         [bezpath setLineJoinStyle:NSMiterLineJoinStyle];
  56         break;
  57     }
  58     switch(pen.GetCap())
  59     {
  60     case wxCAP_ROUND:
  61         [bezpath setLineCapStyle:NSRoundLineCapStyle];
  62         break;
  63     case wxCAP_PROJECTING:
  64         [bezpath setLineCapStyle:NSSquareLineCapStyle];
  65         break;
  66     case wxCAP_BUTT:
  67         [bezpath setLineCapStyle:NSButtLineCapStyle];
  68         break;
  69     }
  70 }
  71
  72 void wxDC::CocoaInitializeTextSystem()
  73 {
  74     wxASSERT_MSG(!sm_cocoaNSTextStorage && !sm_cocoaNSLayoutManager && !sm_cocoaNSTextContainer,wxT("Text system already initalized!  BAD PROGRAMMER!"));
  75
  76     sm_cocoaNSTextStorage = [[NSTextStorage alloc] init];
  77
  78     sm_cocoaNSLayoutManager = [[NSLayoutManager alloc] init];
  79     [sm_cocoaNSTextStorage addLayoutManager:sm_cocoaNSLayoutManager];
  80     // NSTextStorage retains NSLayoutManager, but so do we
  81     // [sm_cocoaNSLayoutManager release]; [sm_cocoaNSLayoutManager retain];
  82
  83     // NOTE:  initWithContainerSize is the designated initializer, but the
  84     // Apple CircleView sample gets away with just calling init, which
  85     // is all we really need for our purposes.
  86     sm_cocoaNSTextContainer = [[NSTextContainer alloc] init];
  87     [sm_cocoaNSLayoutManager addTextContainer:sm_cocoaNSTextContainer];
  88     // NSLayoutManager retains NSTextContainer, but so do we
  89     // [sm_cocoaNSTextContainer release]; [sm_cocoaNSTextContainer retain];
  90 }
  91
  92 void wxDC::CocoaShutdownTextSystem()
  93 {
  94     [sm_cocoaNSTextContainer release]; sm_cocoaNSTextContainer = nil;
  95     [sm_cocoaNSLayoutManager release]; sm_cocoaNSLayoutManager = nil;
  96     [sm_cocoaNSTextStorage release]; sm_cocoaNSTextStorage = nil;
  97 }
  98
  99 void wxDC::CocoaUnwindStackAndLoseFocus()
 100 {
 101     wxCocoaDCStack::compatibility_iterator ourNode=sm_cocoaDCStack.Find(this);
 102     if(ourNode)
 103     {
 104         wxCocoaDCStack::compatibility_iterator node=sm_cocoaDCStack.GetFirst();
 105         for(;node!=ourNode; node=sm_cocoaDCStack.GetFirst())
 106         {
 107             wxDC *dc = node->GetData();
 108             wxASSERT(dc);
 109             wxASSERT(dc!=this);
 110             if(!dc->CocoaUnlockFocus())
 111             {
 112                 wxFAIL_MSG(wxT("Unable to unlock focus on higher-level DC!"));
 113             }
 114             sm_cocoaDCStack.Erase(node);
 115         }
 116         wxASSERT(node==ourNode);
 117         wxASSERT(ourNode->GetData() == this);
 118         ourNode->GetData()->CocoaUnlockFocus();
 119         sm_cocoaDCStack.Erase(ourNode);
 120     }
 121 }
 122
 123 bool wxDC::CocoaUnwindStackAndTakeFocus()
 124 {
 125     wxCocoaDCStack::compatibility_iterator node=sm_cocoaDCStack.GetFirst();
 126     for(;node;node = sm_cocoaDCStack.GetFirst())
 127     {
 128         wxDC *dc = node->GetData();
 129         wxASSERT(dc);
 130         // If we're on the stack, then it's unwound enough and we have focus
 131         if(dc==this)
 132             return true;
 133         // If unable to unlockFocus (e.g. wxPaintDC) stop here
 134         if(!dc->CocoaUnlockFocus())
 135             break;
 136         sm_cocoaDCStack.Erase(node);
 137     }
 138     return CocoaLockFocus();
 139 }
 140
 141 wxDC::wxDC(void)
 142 {
 143     m_cocoaWxToBoundsTransform = nil;
 144     m_pen = *wxBLACK_PEN;
 145 }
 146
 147 wxDC::~wxDC(void)
 148 {
 149 }
 150
 151 bool wxDC::CocoaLockFocus()
 152 {
 153     return false;
 154 }
 155
 156 bool wxDC::CocoaUnlockFocus()
 157 {
 158     return false;
 159 }
 160
 161 /*static*/ WX_NSAffineTransform wxDC::CocoaGetWxToBoundsTransform(bool isFlipped, float height)
 162 {
 163     NSAffineTransform *transform = nil;
 164     // This transform flips the graphics since wxDC uses top-left origin
 165     if(!isFlipped)
 166     {
 167         // The transform is auto released
 168         transform = [NSAffineTransform transform];
 169         /*  x' = 1x + 0y + 0
 170             y' = 0x + -1y + window's height
 171         */
 172         NSAffineTransformStruct matrix = {
 173             1,  0
 174         ,   0, -1
 175         ,   0, height
 176         };
 177         [transform setTransformStruct: matrix];
 178     }
 179     return transform;
 180 }
 181
 182 void wxDC::CocoaApplyTransformations()
 183 {
 184     [m_cocoaWxToBoundsTransform concat];
 185     // TODO: Apply device/logical/user position/scaling transformations
 186 }
 187
 188 void wxDC::CocoaUnapplyTransformations()
 189 {
 190     // NOTE: You *must* call this with focus held.
 191     // Undo all transforms so we're back in true Cocoa coords with
 192     // no scaling or flipping.
 193     NSAffineTransform *invertTransform;
 194     invertTransform = [m_cocoaWxToBoundsTransform copy];
 195     [invertTransform invert];
 196     [invertTransform concat];
 197 }
 198
 199 bool wxDC::CocoaGetBounds(void *rectData)
 200 {
 201     // We don't know what we are so we can't return anything.
 202     return false;
 203 }
 204
 205 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 206 {
 207     wxAutoNSAutoreleasePool pool;
 208     if(!CocoaTakeFocus()) return;
 209     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(x,y,width,height)];
 210     CocoaSetPenForNSBezierPath(m_pen,bezpath);
 211     [bezpath stroke];
 212     [m_brush.GetNSColor() set];
 213     [bezpath fill];
 214 }
 215
 216 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 217 {
 218     wxAutoNSAutoreleasePool pool;
 219     if(!CocoaTakeFocus()) return;
 220     NSBezierPath *bezpath = [NSBezierPath bezierPath];
 221     [bezpath moveToPoint:NSMakePoint(x1,y1)];
 222     [bezpath lineToPoint:NSMakePoint(x2,y2)];
 223
 224     CocoaSetPenForNSBezierPath(m_pen,bezpath);
 225     [bezpath stroke];
 226 }
 227
 228 void wxDC::DoGetTextExtent(const wxString& text, wxCoord *x, wxCoord *y, wxCoord *descent, wxCoord *externalLeading, wxFont *theFont) const
 229 {
 230     wxAutoNSAutoreleasePool pool;
 231 // FIXME: Cache this so it can be used for DoDrawText
 232     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, wxT("Text system has not been initialized.  BAD PROGRAMMER!"));
 233     NSAttributedString *attributedString = [[NSAttributedString alloc]
 234             initWithString:wxNSStringWithWxString(text.c_str())];
 235     [sm_cocoaNSTextStorage setAttributedString:attributedString];
 236     [attributedString release];
 237
 238     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 239     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 240     if(x)
 241         *x=(int)usedRect.size.width;
 242     if(y)
 243         *y=(int)usedRect.size.height;
 244     if(descent)
 245         *descent=0;
 246     if(externalLeading)
 247         *externalLeading=0;
 248 }
 249
 250 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 251 {
 252     wxAutoNSAutoreleasePool pool;
 253     if(!CocoaTakeFocus()) return;
 254     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, wxT("Text system has not been initialized.  BAD PROGRAMMER!"));
 255     NSAttributedString *attributedString = [[NSAttributedString alloc]
 256             initWithString:wxNSStringWithWxString(text.c_str())];
 257     [sm_cocoaNSTextStorage setAttributedString:attributedString];
 258     [attributedString release];
 259
 260     // Set the color (and later font) attributes
 261     NSColor *fgColor = m_textForegroundColour.GetNSColor();
 262     NSColor *bgColor = m_textBackgroundColour.GetNSColor();
 263     if(!fgColor)
 264         fgColor = [NSColor clearColor];
 265     if(!bgColor)
 266         bgColor = [NSColor clearColor];
 267     NSDictionary *attrDict = [[NSDictionary alloc] initWithObjectsAndKeys:
 268             fgColor, NSForegroundColorAttributeName,
 269             bgColor, NSBackgroundColorAttributeName,
 270             nil];
 271     [sm_cocoaNSTextStorage addAttributes: attrDict range:NSMakeRange(0,[sm_cocoaNSTextStorage length])];
 272     [attrDict release];
 273
 274     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 275     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 276     // NOTE: We'll crash trying to get the location of glyphAtIndex:0 if
 277     // there is no length or we don't start at zero
 278     if(!glyphRange.length)
 279         return;
 280     wxASSERT_MSG(glyphRange.location==0,wxT("glyphRange must begin at zero"));
 281
 282     NSAffineTransform *transform = [NSAffineTransform transform];
 283     [transform translateXBy:x yBy:y];
 284
 285     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 286     /*  x' = 1x + 0y + 0
 287         y' = 0x + -1y + window's height
 288     */
 289     NSAffineTransformStruct matrix = {
 290         1,  0
 291     ,   0, -1
 292     ,   0, usedRect.size.height
 293     };
 294     [flipTransform setTransformStruct: matrix];
 295
 296     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 297     [context saveGraphicsState];
 298     [transform concat];
 299     [flipTransform concat];
 300     #if 0
 301     // Draw+fill a rectangle so we can see where the shit is supposed to be.
 302     wxLogTrace(wxTRACE_COCOA,wxT("(%f,%f) (%fx%f)"),usedRect.origin.x,usedRect.origin.y,usedRect.size.width,usedRect.size.height);
 303     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(0,0,usedRect.size.width,usedRect.size.height)];
 304     [[NSColor blackColor] set];
 305     [bezpath stroke];
 306     [[NSColor blueColor] set];
 307     [bezpath fill];
 308     #endif
 309
 310     NSPoint layoutLocation = [sm_cocoaNSLayoutManager locationForGlyphAtIndex:0];
 311     layoutLocation.x = 0.0;
 312     layoutLocation.y *= -1.0;
 313     layoutLocation.y += [[sm_cocoaNSLayoutManager typesetter] baselineOffsetInLayoutManager:sm_cocoaNSLayoutManager glyphIndex:0];
 314     if(m_backgroundMode==wxSOLID)
 315         [sm_cocoaNSLayoutManager drawBackgroundForGlyphRange:glyphRange  atPoint:NSZeroPoint];
 316     [sm_cocoaNSLayoutManager drawGlyphsForGlyphRange:glyphRange  atPoint:layoutLocation];
 317
 318     [context restoreGraphicsState];
 319 }
 320
 321 // wxDCBase functions
 322 int wxDCBase::DeviceToLogicalX(int x) const
 323 {
 324     return x;
 325 }
 326
 327 int wxDCBase::DeviceToLogicalY(int y) const
 328 {
 329     return y;
 330 }
 331
 332 int wxDCBase::DeviceToLogicalXRel(int x) const
 333 {
 334     return x;
 335 }
 336
 337 int wxDCBase::DeviceToLogicalYRel(int y) const
 338 {
 339     return y;
 340 }
 341
 342 int wxDCBase::LogicalToDeviceX(int x) const
 343 {
 344     return x;
 345 }
 346
 347 int wxDCBase::LogicalToDeviceY(int y) const
 348 {
 349     return y;
 350 }
 351
 352 int wxDCBase::LogicalToDeviceXRel(int x) const
 353 {
 354     return x;
 355 }
 356
 357 int wxDCBase::LogicalToDeviceYRel(int y) const
 358 {
 359     return y;
 360 }
 361
 362 ///////////////////////////////////////////////////////////////////////////
 363 // cut here, the rest is stubs
 364 ///////////////////////////////////////////////////////////////////////////
 365
 366 //-----------------------------------------------------------------------------
 367 // constants
 368 //-----------------------------------------------------------------------------
 369
 370 #define mm2inches               0.0393700787402
 371 #define inches2mm               25.4
 372 #define mm2twips                56.6929133859
 373 #define twips2mm                0.0176388888889
 374 #define mm2pt                   2.83464566929
 375 #define pt2mm                   0.352777777778
 376
 377 //-----------------------------------------------------------------------------
 378 // wxDC
 379 //-----------------------------------------------------------------------------
 380
 381 void wxDC::DoDrawIcon( const wxIcon &WXUNUSED(icon), int WXUNUSED(x), int WXUNUSED(y) )
 382 {
 383 };
 384
 385 void wxDC::DoDrawPoint( int x, int y )
 386 {
 387 };
 388
 389 void wxDC::DoDrawPolygon( int, wxPoint *, int, int, int)
 390 {
 391 };
 392
 393 void wxDC::DoDrawLines( int, wxPoint *, int, int )
 394 {
 395 }
 396
 397 int wxDC::GetDepth() const
 398 {
 399     return 0;
 400 }
 401
 402 wxSize wxDC::GetPPI() const
 403 {
 404     return wxSize(0,0);
 405 }
 406
 407 bool wxDC::CanGetTextExtent() const
 408 {
 409     return false;
 410 }
 411
 412 wxCoord wxDC::GetCharHeight() const
 413 {
 414     return 0;
 415 }
 416
 417 wxCoord wxDC::GetCharWidth() const
 418 {
 419     return 0;
 420 }
 421
 422 bool wxDC::CanDrawBitmap() const
 423 {
 424     return true;
 425 }
 426
 427 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 428 {
 429     return false;
 430 }
 431
 432 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 433 {
 434 }
 435
 436 void wxDC::SetPen(const wxPen& pen)
 437 {
 438     m_pen = pen;
 439 }
 440
 441 void wxDC::SetBrush(const wxBrush& brush)
 442 {
 443     m_brush = brush;
 444 }
 445
 446 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 447 {
 448 }
 449
 450 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 451 {
 452 }
 453
 454 void wxDC::DestroyClippingRegion()
 455 {
 456 }
 457
 458 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 459 {
 460 }
 461
 462 void wxDC::DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 463 {
 464 }
 465
 466 void wxDC::DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea)
 467 {
 468 }
 469
 470 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 471 {
 472 }
 473
 474 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 475 {
 476     wxAutoNSAutoreleasePool pool;
 477     if(!CocoaTakeFocus()) return;
 478     if(!bmp.Ok())
 479         return;
 480
 481 #if 0
 482     // Draw a rect so we can see where it's supposed to be
 483     wxLogTrace(wxTRACE_COCOA,wxT("image at (%d,%d) size %dx%d"),x,y,bmp.GetWidth(),bmp.GetHeight());
 484     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(x,y,bmp.GetWidth(),bmp.GetHeight())];
 485     [[NSColor blackColor] set];
 486     [bezpath stroke];
 487     [[NSColor blueColor] set];
 488     [bezpath fill];
 489 #endif // 0
 490
 491     NSAffineTransform *transform = [NSAffineTransform transform];
 492     [transform translateXBy:x yBy:y];
 493
 494     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 495     /*  x' = 1x + 0y + 0
 496         y' = 0x + -1y + window's height
 497     */
 498     NSAffineTransformStruct matrix = {
 499         1,  0
 500     ,   0, -1
 501     ,   0, bmp.GetHeight()
 502     };
 503     [flipTransform setTransformStruct: matrix];
 504
 505     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 506     [context saveGraphicsState];
 507     [transform concat];
 508     [flipTransform concat];
 509
 510     NSImage *nsimage = [bmp.GetNSImage(useMask) retain];
 511
 512     [nsimage drawAtPoint: NSMakePoint(0,0)
 513         fromRect: NSMakeRect(0.0,0.0,bmp.GetWidth(),bmp.GetHeight())
 514         operation: NSCompositeSourceOver
 515         fraction: 1.0];
 516
 517     [nsimage release];
 518     [context restoreGraphicsState];
 519 }
 520
 521 bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
 522 {
 523     return false;
 524 }
 525
 526 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 527 {
 528 }
 529
 530
 531 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest, wxCoord width, wxCoord height, wxDC *source, wxCoord xsrc, wxCoord ysrc, int rop, bool useMask , wxCoord xsrcMask, wxCoord ysrcMask)
 532 {
 533     if(!CocoaTakeFocus()) return false;
 534     if(!source) return false;
 535     return source->CocoaDoBlitOnFocusedDC(xdest,ydest,width,height,
 536         xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
 537 }
 538
 539 bool wxDC::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
 540     wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
 541     int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
 542 {
 543     return false;
 544 }
 545
 546 void wxDC::DoGetSize( int* width, int* height ) const
 547 {
 548   *width = m_maxX-m_minX;
 549   *height = m_maxY-m_minY;
 550 };
 551
 552 void wxDC::DoGetSizeMM( int* width, int* height ) const
 553 {
 554   int w = 0;
 555   int h = 0;
 556   GetSize( &w, &h );
 557 };
 558
 559 void wxDC::SetTextForeground( const wxColour &col )
 560 {
 561   if (!Ok()) return;
 562   m_textForegroundColour = col;
 563 };
 564
 565 void wxDC::SetTextBackground( const wxColour &col )
 566 {
 567   if (!Ok()) return;
 568   m_textBackgroundColour = col;
 569 };
 570
 571 void wxDC::Clear()
 572 {
 573     if(!CocoaTakeFocus()) return;
 574
 575     NSRect boundsRect;
 576     if(!CocoaGetBounds(&boundsRect)) return;
 577
 578     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 579     [context saveGraphicsState];
 580
 581     // Undo all transforms so when we draw our bounds rect we
 582     // really overwrite our bounds rect.
 583     CocoaUnapplyTransformations();
 584
 585     [m_backgroundBrush.GetNSColor() set];
 586     [NSBezierPath fillRect:boundsRect];
 587
 588     [context restoreGraphicsState];
 589 }
 590
 591 void wxDC::SetBackground(const wxBrush& brush)
 592 {
 593     m_backgroundBrush = brush;
 594 }
 595
 596 void wxDC::SetPalette(const wxPalette&)
 597 {
 598 }
 599
 600 void wxDC::SetLogicalFunction(int)
 601 {
 602 }
 603
 604
 605 void wxDC::SetMapMode( int mode )
 606 {
 607   switch (mode)
 608   {
 609     case wxMM_TWIPS:
 610       break;
 611     case wxMM_POINTS:
 612       break;
 613     case wxMM_METRIC:
 614       break;
 615     case wxMM_LOMETRIC:
 616       break;
 617     default:
 618     case wxMM_TEXT:
 619       SetLogicalScale( 1.0, 1.0 );
 620       break;
 621   };
 622   if (mode != wxMM_TEXT)
 623   {
 624   };
 625 };
 626
 627 void wxDC::SetUserScale( double x, double y )
 628 {
 629   // allow negative ? -> no
 630   m_userScaleX = x;
 631   m_userScaleY = y;
 632   ComputeScaleAndOrigin();
 633 };
 634
 635 void wxDC::SetLogicalScale( double x, double y )
 636 {
 637   // allow negative ?
 638   m_logicalScaleX = x;
 639   m_logicalScaleY = y;
 640   ComputeScaleAndOrigin();
 641 };
 642
 643 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 644 {
 645   m_logicalOriginX = x * m_signX;   // is this still correct ?
 646   m_logicalOriginY = y * m_signY;
 647   ComputeScaleAndOrigin();
 648 };
 649
 650 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 651 {
 652   ComputeScaleAndOrigin();
 653 };
 654
 655 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 656 {
 657   m_signX = (xLeftRight ?  1 : -1);
 658   m_signY = (yBottomUp  ? -1 :  1);
 659   ComputeScaleAndOrigin();
 660 };
 661
 662 void wxDC::ComputeScaleAndOrigin(void)
 663 {
 664   // CMB: copy scale to see if it changes
 665   double origScaleX = m_scaleX;
 666   double origScaleY = m_scaleY;
 667
 668   m_scaleX = m_logicalScaleX * m_userScaleX;
 669   m_scaleY = m_logicalScaleY * m_userScaleY;
 670
 671   // CMB: if scale has changed call SetPen to recalulate the line width
 672   if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 673   {
 674     // this is a bit artificial, but we need to force wxDC to think
 675     // the pen has changed
 676     const wxPen* pen = & GetPen();
 677     wxPen tempPen;
 678     m_pen = tempPen;
 679     SetPen(* pen);
 680   }
 681 };
 682