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