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:     wxWindows license
  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_cocoaFlipped = false;
 144     m_cocoaHeight = 0.0;
 145     m_pen = *wxBLACK_PEN;
 146 }
 147
 148 wxDC::~wxDC(void)
 149 {
 150 }
 151
 152 bool wxDC::CocoaLockFocus()
 153 {
 154     return false;
 155 }
 156
 157 bool wxDC::CocoaUnlockFocus()
 158 {
 159     return false;
 160 }
 161
 162 void wxDC::CocoaApplyTransformations()
 163 {
 164     // This transform flips the graphics since wxDC uses top-left origin
 165     if(!m_cocoaFlipped)
 166     {
 167         // The transform is auto released
 168         NSAffineTransform *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, m_cocoaHeight
 176         };
 177         [transform setTransformStruct: matrix];
 178         // Apply the transform
 179         [transform concat];
 180     }
 181     // TODO: Apply scaling transformation
 182 }
 183
 184 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 185 {
 186     wxAutoNSAutoreleasePool pool;
 187     if(!CocoaTakeFocus()) return;
 188     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(x,y,width,height)];
 189     CocoaSetPenForNSBezierPath(m_pen,bezpath);
 190     [bezpath stroke];
 191     [m_brush.GetNSColor() set];
 192     [bezpath fill];
 193 }
 194
 195 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
 196 {
 197     wxAutoNSAutoreleasePool pool;
 198     if(!CocoaTakeFocus()) return;
 199     NSBezierPath *bezpath = [NSBezierPath bezierPath];
 200     [bezpath moveToPoint:NSMakePoint(x1,y1)];
 201     [bezpath lineToPoint:NSMakePoint(x2,y2)];
 202
 203     CocoaSetPenForNSBezierPath(m_pen,bezpath);
 204     [bezpath stroke];
 205 }
 206
 207 void wxDC::DoGetTextExtent(const wxString& text, wxCoord *x, wxCoord *y, wxCoord *descent, wxCoord *externalLeading, wxFont *theFont) const
 208 {
 209     wxAutoNSAutoreleasePool pool;
 210 // FIXME: Cache this so it can be used for DoDrawText
 211     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, wxT("Text system has not been initialized.  BAD PROGRAMMER!"));
 212     NSAttributedString *attributedString = [[NSAttributedString alloc]
 213             initWithString:wxNSStringWithWxString(text.c_str())];
 214     [sm_cocoaNSTextStorage setAttributedString:attributedString];
 215     [attributedString release];
 216
 217     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 218     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 219     if(x)
 220         *x=(int)usedRect.size.width;
 221     if(y)
 222         *y=(int)usedRect.size.height;
 223     if(descent)
 224         *descent=0;
 225     if(externalLeading)
 226         *externalLeading=0;
 227 }
 228
 229 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 230 {
 231     wxAutoNSAutoreleasePool pool;
 232     if(!CocoaTakeFocus()) return;
 233     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, wxT("Text system has not been initialized.  BAD PROGRAMMER!"));
 234     NSAttributedString *attributedString = [[NSAttributedString alloc]
 235             initWithString:wxNSStringWithWxString(text.c_str())];
 236     [sm_cocoaNSTextStorage setAttributedString:attributedString];
 237     [attributedString release];
 238
 239     // Set the color (and later font) attributes
 240     NSColor *fgColor = m_textForegroundColour.GetNSColor();
 241     NSColor *bgColor = m_textBackgroundColour.GetNSColor();
 242     if(!fgColor)
 243         fgColor = [NSColor clearColor];
 244     if(!bgColor)
 245         bgColor = [NSColor clearColor];
 246     NSDictionary *attrDict = [[NSDictionary alloc] initWithObjectsAndKeys:
 247             fgColor, NSForegroundColorAttributeName,
 248             bgColor, NSBackgroundColorAttributeName,
 249             nil];
 250     [sm_cocoaNSTextStorage addAttributes: attrDict range:NSMakeRange(0,[sm_cocoaNSTextStorage length])];
 251     [attrDict release];
 252
 253     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 254     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 255     // NOTE: We'll crash trying to get the location of glyphAtIndex:0 if
 256     // there is no length or we don't start at zero
 257     if(!glyphRange.length)
 258         return;
 259     wxASSERT_MSG(glyphRange.location==0,wxT("glyphRange must begin at zero"));
 260
 261     NSAffineTransform *transform = [NSAffineTransform transform];
 262     [transform translateXBy:x yBy:y];
 263
 264     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 265     /*  x' = 1x + 0y + 0
 266         y' = 0x + -1y + window's height
 267     */
 268     NSAffineTransformStruct matrix = {
 269         1,  0
 270     ,   0, -1
 271     ,   0, usedRect.size.height
 272     };
 273     [flipTransform setTransformStruct: matrix];
 274
 275     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 276     [context saveGraphicsState];
 277     [transform concat];
 278     [flipTransform concat];
 279     #if 0
 280     // Draw+fill a rectangle so we can see where the shit is supposed to be.
 281     wxLogTrace(wxTRACE_COCOA,wxT("(%f,%f) (%fx%f)"),usedRect.origin.x,usedRect.origin.y,usedRect.size.width,usedRect.size.height);
 282     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(0,0,usedRect.size.width,usedRect.size.height)];
 283     [[NSColor blackColor] set];
 284     [bezpath stroke];
 285     [[NSColor blueColor] set];
 286     [bezpath fill];
 287     #endif
 288
 289     NSPoint layoutLocation = [sm_cocoaNSLayoutManager locationForGlyphAtIndex:0];
 290     layoutLocation.x = 0.0;
 291     layoutLocation.y *= -1.0;
 292     layoutLocation.y += [[sm_cocoaNSLayoutManager typesetter] baselineOffsetInLayoutManager:sm_cocoaNSLayoutManager glyphIndex:0];
 293     if(m_backgroundMode==wxSOLID)
 294         [sm_cocoaNSLayoutManager drawBackgroundForGlyphRange:glyphRange  atPoint:NSZeroPoint];
 295     [sm_cocoaNSLayoutManager drawGlyphsForGlyphRange:glyphRange  atPoint:layoutLocation];
 296
 297     [context restoreGraphicsState];
 298 }
 299
 300 // wxDCBase functions
 301 int wxDCBase::DeviceToLogicalX(int x) const
 302 {
 303     return x;
 304 }
 305
 306 int wxDCBase::DeviceToLogicalY(int y) const
 307 {
 308     return y;
 309 }
 310
 311 int wxDCBase::DeviceToLogicalXRel(int x) const
 312 {
 313     return x;
 314 }
 315
 316 int wxDCBase::DeviceToLogicalYRel(int y) const
 317 {
 318     return y;
 319 }
 320
 321 int wxDCBase::LogicalToDeviceX(int x) const
 322 {
 323     return x;
 324 }
 325
 326 int wxDCBase::LogicalToDeviceY(int y) const
 327 {
 328     return y;
 329 }
 330
 331 int wxDCBase::LogicalToDeviceXRel(int x) const
 332 {
 333     return x;
 334 }
 335
 336 int wxDCBase::LogicalToDeviceYRel(int y) const
 337 {
 338     return y;
 339 }
 340
 341 ///////////////////////////////////////////////////////////////////////////
 342 // cut here, the rest is stubs
 343 ///////////////////////////////////////////////////////////////////////////
 344
 345 //-----------------------------------------------------------------------------
 346 // constants
 347 //-----------------------------------------------------------------------------
 348
 349 #define mm2inches               0.0393700787402
 350 #define inches2mm               25.4
 351 #define mm2twips                56.6929133859
 352 #define twips2mm                0.0176388888889
 353 #define mm2pt                   2.83464566929
 354 #define pt2mm                   0.352777777778
 355
 356 //-----------------------------------------------------------------------------
 357 // wxDC
 358 //-----------------------------------------------------------------------------
 359
 360 void wxDC::DoDrawIcon( const wxIcon &WXUNUSED(icon), int WXUNUSED(x), int WXUNUSED(y) )
 361 {
 362 };
 363
 364 void wxDC::DoDrawPoint( int x, int y )
 365 {
 366 };
 367
 368 void wxDC::DoDrawPolygon( int, wxPoint *, int, int, int)
 369 {
 370 };
 371
 372 void wxDC::DoDrawLines( int, wxPoint *, int, int )
 373 {
 374 }
 375
 376 int wxDC::GetDepth() const
 377 {
 378     return 0;
 379 }
 380
 381 wxSize wxDC::GetPPI() const
 382 {
 383     return wxSize(0,0);
 384 }
 385
 386 bool wxDC::CanGetTextExtent() const
 387 {
 388     return false;
 389 }
 390
 391 wxCoord wxDC::GetCharHeight() const
 392 {
 393     return 0;
 394 }
 395
 396 wxCoord wxDC::GetCharWidth() const
 397 {
 398     return 0;
 399 }
 400
 401 bool wxDC::CanDrawBitmap() const
 402 {
 403     return true;
 404 }
 405
 406 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 407 {
 408     return false;
 409 }
 410
 411 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 412 {
 413 }
 414
 415 void wxDC::SetPen(const wxPen& pen)
 416 {
 417     m_pen = pen;
 418 }
 419
 420 void wxDC::SetBrush(const wxBrush& brush)
 421 {
 422     m_brush = brush;
 423 }
 424
 425 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 426 {
 427 }
 428
 429 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 430 {
 431 }
 432
 433 void wxDC::DestroyClippingRegion()
 434 {
 435 }
 436
 437 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 438 {
 439 }
 440
 441 void wxDC::DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 442 {
 443 }
 444
 445 void wxDC::DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea)
 446 {
 447 }
 448
 449 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 450 {
 451 }
 452
 453 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 454 {
 455     wxAutoNSAutoreleasePool pool;
 456     if(!CocoaTakeFocus()) return;
 457     if(!bmp.Ok())
 458         return;
 459
 460 #if 0
 461     // Draw a rect so we can see where it's supposed to be
 462     wxLogTrace(wxTRACE_COCOA,wxT("image at (%d,%d) size %dx%d"),x,y,bmp.GetWidth(),bmp.GetHeight());
 463     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(x,y,bmp.GetWidth(),bmp.GetHeight())];
 464     [[NSColor blackColor] set];
 465     [bezpath stroke];
 466     [[NSColor blueColor] set];
 467     [bezpath fill];
 468 #endif // 0
 469
 470     NSAffineTransform *transform = [NSAffineTransform transform];
 471     [transform translateXBy:x yBy:y];
 472
 473     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 474     /*  x' = 1x + 0y + 0
 475         y' = 0x + -1y + window's height
 476     */
 477     NSAffineTransformStruct matrix = {
 478         1,  0
 479     ,   0, -1
 480     ,   0, bmp.GetHeight()
 481     };
 482     [flipTransform setTransformStruct: matrix];
 483
 484     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 485     [context saveGraphicsState];
 486     [transform concat];
 487     [flipTransform concat];
 488
 489     NSImage *nsimage = [bmp.GetNSImage(useMask) retain];
 490
 491     [nsimage drawAtPoint: NSMakePoint(0,0)
 492         fromRect: NSMakeRect(0.0,0.0,bmp.GetWidth(),bmp.GetHeight())
 493         operation: NSCompositeSourceOver
 494         fraction: 1.0];
 495
 496     [nsimage release];
 497     [context restoreGraphicsState];
 498 }
 499
 500 bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
 501 {
 502     return false;
 503 }
 504
 505 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 506 {
 507 }
 508
 509
 510 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)
 511 {
 512     if(!CocoaTakeFocus()) return false;
 513     if(!source) return false;
 514     return source->CocoaDoBlitOnFocusedDC(xdest,ydest,width,height,
 515         xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
 516 }
 517
 518 bool wxDC::CocoaDoBlitOnFocusedDC(wxCoord xdest, wxCoord ydest,
 519     wxCoord width, wxCoord height, wxCoord xsrc, wxCoord ysrc,
 520     int logicalFunc, bool useMask, wxCoord xsrcMask, wxCoord ysrcMask)
 521 {
 522     return false;
 523 }
 524
 525 void wxDC::DoGetSize( int* width, int* height ) const
 526 {
 527   *width = m_maxX-m_minX;
 528   *height = m_maxY-m_minY;
 529 };
 530
 531 void wxDC::DoGetSizeMM( int* width, int* height ) const
 532 {
 533   int w = 0;
 534   int h = 0;
 535   GetSize( &w, &h );
 536 };
 537
 538 void wxDC::SetTextForeground( const wxColour &col )
 539 {
 540   if (!Ok()) return;
 541   m_textForegroundColour = col;
 542 };
 543
 544 void wxDC::SetTextBackground( const wxColour &col )
 545 {
 546   if (!Ok()) return;
 547   m_textBackgroundColour = col;
 548 };
 549
 550 void wxDC::Clear()
 551 {
 552 }
 553
 554 void wxDC::SetBackground(const wxBrush& brush)
 555 {
 556     m_backgroundBrush = brush;
 557 }
 558
 559 void wxDC::SetPalette(const wxPalette&)
 560 {
 561 }
 562
 563 void wxDC::SetLogicalFunction(int)
 564 {
 565 }
 566
 567
 568 void wxDC::SetMapMode( int mode )
 569 {
 570   switch (mode)
 571   {
 572     case wxMM_TWIPS:
 573       break;
 574     case wxMM_POINTS:
 575       break;
 576     case wxMM_METRIC:
 577       break;
 578     case wxMM_LOMETRIC:
 579       break;
 580     default:
 581     case wxMM_TEXT:
 582       SetLogicalScale( 1.0, 1.0 );
 583       break;
 584   };
 585   if (mode != wxMM_TEXT)
 586   {
 587   };
 588 };
 589
 590 void wxDC::SetUserScale( double x, double y )
 591 {
 592   // allow negative ? -> no
 593   m_userScaleX = x;
 594   m_userScaleY = y;
 595   ComputeScaleAndOrigin();
 596 };
 597
 598 void wxDC::SetLogicalScale( double x, double y )
 599 {
 600   // allow negative ?
 601   m_logicalScaleX = x;
 602   m_logicalScaleY = y;
 603   ComputeScaleAndOrigin();
 604 };
 605
 606 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 607 {
 608   m_logicalOriginX = x * m_signX;   // is this still correct ?
 609   m_logicalOriginY = y * m_signY;
 610   ComputeScaleAndOrigin();
 611 };
 612
 613 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 614 {
 615   ComputeScaleAndOrigin();
 616 };
 617
 618 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 619 {
 620   m_signX = (xLeftRight ?  1 : -1);
 621   m_signY = (yBottomUp  ? -1 :  1);
 622   ComputeScaleAndOrigin();
 623 };
 624
 625 void wxDC::ComputeScaleAndOrigin(void)
 626 {
 627   // CMB: copy scale to see if it changes
 628   double origScaleX = m_scaleX;
 629   double origScaleY = m_scaleY;
 630
 631   m_scaleX = m_logicalScaleX * m_userScaleX;
 632   m_scaleY = m_logicalScaleY * m_userScaleY;
 633
 634   // CMB: if scale has changed call SetPen to recalulate the line width
 635   if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 636   {
 637     // this is a bit artificial, but we need to force wxDC to think
 638     // the pen has changed
 639     wxPen* pen = & GetPen();
 640     wxPen tempPen;
 641     m_pen = tempPen;
 642     SetPen(* pen);
 643   }
 644 };
 645