src/osx/carbon/utilscocoa.mm

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        src/osx/carbon/utils.mm
   3 // Purpose:     various cocoa mixin utility functions
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id: utilscocoa.mm 48805 2007-09-19 14:52:25Z SC $
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include "wx/wxprec.h"
  13
  14 #if wxOSX_USE_COCOA_OR_CARBON
  15 #include <Cocoa/Cocoa.h>
  16 #else
  17 #import <UIKit/UIKit.h>
  18 #endif
  19
  20 #ifdef __WXMAC__
  21 #include "wx/osx/private.h"
  22 #endif
  23
  24 #include "wx/fontutil.h"
  25
  26 #if wxOSX_USE_COCOA
  27 #include "wx/cocoa/string.h"
  28 #endif
  29
  30 #ifdef __WXMAC__
  31
  32 #if wxOSX_USE_CARBON
  33 bool wxMacInitCocoa()
  34 {
  35     bool cocoaLoaded = NSApplicationLoad();
  36     wxASSERT_MSG(cocoaLoaded,wxT("Couldn't load Cocoa in Carbon Environment")) ;
  37     return cocoaLoaded;
  38 }
  39 #endif
  40
  41 wxMacAutoreleasePool::wxMacAutoreleasePool()
  42 {
  43     m_pool = [[NSAutoreleasePool alloc] init];
  44 }
  45
  46 wxMacAutoreleasePool::~wxMacAutoreleasePool()
  47 {
  48     [(NSAutoreleasePool*)m_pool release];
  49 }
  50
  51 #endif
  52
  53 #if wxOSX_USE_COCOA
  54
  55 CGContextRef wxOSXGetContextFromCurrentContext()
  56 {
  57     CGContextRef context = (CGContextRef)[[NSGraphicsContext currentContext]
  58                                           graphicsPort];
  59     return context;
  60 }
  61
  62 bool wxOSXLockFocus( WXWidget view)
  63 {
  64     return [view lockFocusIfCanDraw];
  65 }
  66
  67 void wxOSXUnlockFocus( WXWidget view)
  68 {
  69     [view unlockFocus];
  70 }
  71
  72 #endif
  73
  74 #if wxOSX_USE_IPHONE
  75
  76 CGContextRef wxOSXGetContextFromCurrentContext()
  77 {
  78     CGContextRef context = UIGraphicsGetCurrentContext();
  79     return context;
  80 }
  81
  82 #endif
  83
  84 // ----------------------------------------------------------------------------
  85 // NSObject Utils
  86 // ----------------------------------------------------------------------------
  87
  88 void wxMacCocoaRelease( void* obj )
  89 {
  90     [(NSObject*)obj release];
  91 }
  92
  93 void wxMacCocoaAutorelease( void* obj )
  94 {
  95     [(NSObject*)obj autorelease];
  96 }
  97
  98 void* wxMacCocoaRetain( void* obj )
  99 {
 100     [(NSObject*)obj retain];
 101     return obj;
 102 }
 103
 104 // ----------------------------------------------------------------------------
 105 // NSFont Utils
 106 // ----------------------------------------------------------------------------
 107
 108 #if wxOSX_USE_COCOA
 109 wxFont::wxFont(WX_NSFont nsfont)
 110 {
 111     [nsfont retain];
 112     wxNativeFontInfo info;
 113     SetNativeInfoFromNSFont(nsfont, &info);
 114     Create(info);
 115 }
 116
 117 void wxFont::SetNativeInfoFromNSFont(WX_NSFont theFont, wxNativeFontInfo* info)
 118 {
 119     if ( info->m_faceName.empty())
 120     {
 121         //Get more information about the user's chosen font
 122         NSFontTraitMask theTraits = [[NSFontManager sharedFontManager] traitsOfFont:theFont];
 123         int theFontWeight = [[NSFontManager sharedFontManager] weightOfFont:theFont];
 124
 125         wxFontFamily fontFamily = wxFONTFAMILY_DEFAULT;
 126         //Set the wx font to the appropriate data
 127         if(theTraits & NSFixedPitchFontMask)
 128             fontFamily = wxFONTFAMILY_TELETYPE;
 129
 130         wxFontStyle fontstyle = wxFONTSTYLE_NORMAL;
 131         wxFontWeight fontweight = wxFONTWEIGHT_NORMAL;
 132         bool underlined = false;
 133
 134         int size = (int) ([theFont pointSize]+0.5);
 135
 136         if ( theFontWeight >= 9 )
 137             fontweight = wxFONTWEIGHT_BOLD ;
 138         else if ( theFontWeight < 5 )
 139             fontweight = wxFONTWEIGHT_LIGHT;
 140         else
 141             fontweight = wxFONTWEIGHT_NORMAL ;
 142
 143         if ( theTraits & NSItalicFontMask )
 144             fontstyle = wxFONTSTYLE_ITALIC ;
 145
 146         info->Init(size,fontFamily,fontstyle,fontweight,underlined,
 147             wxStringWithNSString([theFont familyName]), wxFONTENCODING_DEFAULT);
 148
 149     }
 150 }
 151
 152 WX_NSFont wxFont::OSXCreateNSFont(wxOSXSystemFont font, wxNativeFontInfo* info)
 153 {
 154     NSFont* nsfont = nil;
 155     switch( font )
 156     {
 157         case wxOSX_SYSTEM_FONT_NORMAL:
 158             nsfont = [NSFont systemFontOfSize:[NSFont systemFontSize]];
 159             break;
 160         case wxOSX_SYSTEM_FONT_BOLD:
 161             nsfont = [NSFont boldSystemFontOfSize:[NSFont systemFontSize]];
 162             break;
 163         case wxOSX_SYSTEM_FONT_SMALL:
 164             nsfont = [NSFont systemFontOfSize:[NSFont smallSystemFontSize]];
 165             break;
 166         case wxOSX_SYSTEM_FONT_SMALL_BOLD:
 167             nsfont = [NSFont boldSystemFontOfSize:[NSFont smallSystemFontSize]];
 168             break;
 169         case wxOSX_SYSTEM_FONT_MINI:
 170             nsfont = [NSFont systemFontOfSize:
 171                 [NSFont systemFontSizeForControlSize:NSMiniControlSize]];
 172             break;
 173        case wxOSX_SYSTEM_FONT_MINI_BOLD:
 174             nsfont = [NSFont boldSystemFontOfSize:
 175                 [NSFont systemFontSizeForControlSize:NSMiniControlSize]];
 176             break;
 177         case wxOSX_SYSTEM_FONT_LABELS:
 178             nsfont = [NSFont labelFontOfSize:[NSFont labelFontSize]];
 179             break;
 180        case wxOSX_SYSTEM_FONT_VIEWS:
 181             nsfont = [NSFont controlContentFontOfSize:0];
 182             break;
 183         default:
 184             break;
 185     }
 186     [nsfont retain];
 187     SetNativeInfoFromNSFont(nsfont, info);
 188     return nsfont;
 189 }
 190
 191 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
 192 static const NSAffineTransformStruct kSlantNSTransformStruct = { 1, 0, tan(DegToRad(11)), 1, 0, 0  };
 193
 194 WX_NSFont wxFont::OSXCreateNSFont(const wxNativeFontInfo* info)
 195 {
 196     NSFont* nsFont;
 197     int weight = 5;
 198     NSFontTraitMask traits = 0;
 199     if (info->m_weight == wxFONTWEIGHT_BOLD)
 200     {
 201         traits |= NSBoldFontMask;
 202         weight = 9;
 203     }
 204     else if (info->m_weight == wxFONTWEIGHT_LIGHT)
 205         weight = 3;
 206
 207     if (info->m_style == wxFONTSTYLE_ITALIC || info->m_style == wxFONTSTYLE_SLANT)
 208         traits |= NSItalicFontMask;
 209
 210     nsFont = [[NSFontManager sharedFontManager] fontWithFamily:wxCFStringRef(info->m_faceName).AsNSString()
 211         traits:traits weight:weight size:info->m_pointSize];
 212
 213     if ( nsFont == nil )
 214     {
 215         NSFontTraitMask remainingTraits = traits;
 216         nsFont = [[NSFontManager sharedFontManager] fontWithFamily:wxCFStringRef(info->m_faceName).AsNSString()
 217                                                             traits:0 weight:5 size:info->m_pointSize];
 218         if ( nsFont == nil )
 219         {
 220             if ( info->m_weight == wxFONTWEIGHT_BOLD )
 221             {
 222                 nsFont = [NSFont boldSystemFontOfSize:info->m_pointSize];
 223                 remainingTraits &= ~NSBoldFontMask;
 224             }
 225             else
 226                 nsFont = [NSFont systemFontOfSize:info->m_pointSize];
 227         }
 228
 229         // fallback - if in doubt, let go of the bold attribute
 230         if ( nsFont && (remainingTraits & NSItalicFontMask) )
 231         {
 232             NSFont* nsFontWithTraits = nil;
 233             if ( remainingTraits & NSBoldFontMask)
 234             {
 235                 nsFontWithTraits = [[NSFontManager sharedFontManager] convertFont:nsFont toHaveTrait:NSBoldFontMask];
 236                 if ( nsFontWithTraits == nil )
 237                 {
 238                     nsFontWithTraits = [[NSFontManager sharedFontManager] convertFont:nsFont toHaveTrait:NSItalicFontMask];
 239                     if ( nsFontWithTraits != nil )
 240                         remainingTraits &= ~NSItalicFontMask;
 241                 }
 242                 else
 243                 {
 244                     remainingTraits &= ~NSBoldFontMask;
 245                 }
 246             }
 247             if ( remainingTraits & NSItalicFontMask)
 248             {
 249                 if ( nsFontWithTraits == nil )
 250                     nsFontWithTraits = nsFont;
 251
 252                 NSAffineTransform* transform = [NSAffineTransform transform];
 253                 [transform setTransformStruct:kSlantNSTransformStruct];
 254                 [transform scaleBy:info->m_pointSize];
 255                 NSFontDescriptor* italicDesc = [[nsFontWithTraits fontDescriptor] fontDescriptorWithMatrix:transform];
 256                 if ( italicDesc != nil )
 257                 {
 258                     NSFont* f = [NSFont fontWithDescriptor:italicDesc size:(CGFloat)(info->m_pointSize)];
 259                     if ( f != nil )
 260                         nsFontWithTraits = f;
 261                 }
 262             }
 263             if ( nsFontWithTraits != nil )
 264                 nsFont = nsFontWithTraits;
 265         }
 266     }
 267
 268     wxASSERT_MSG(nsFont != nil,wxT("Couldn't create nsFont")) ;
 269     wxMacCocoaRetain(nsFont);
 270     return nsFont;
 271 }
 272
 273 #endif
 274
 275 #if wxOSX_USE_IPHONE
 276
 277 WX_UIFont wxFont::OSXCreateUIFont(wxOSXSystemFont font, wxNativeFontInfo* info)
 278 {
 279     UIFont* uifont;
 280     switch( font )
 281     {
 282         case wxOSX_SYSTEM_FONT_NORMAL:
 283             uifont = [UIFont systemFontOfSize:[UIFont systemFontSize]];
 284             break;
 285         case wxOSX_SYSTEM_FONT_BOLD:
 286             uifont = [UIFont boldSystemFontOfSize:[UIFont systemFontSize]];
 287             break;
 288         case wxOSX_SYSTEM_FONT_MINI:
 289         case wxOSX_SYSTEM_FONT_SMALL:
 290             uifont = [UIFont systemFontOfSize:[UIFont smallSystemFontSize]];
 291             break;
 292         case wxOSX_SYSTEM_FONT_MINI_BOLD:
 293         case wxOSX_SYSTEM_FONT_SMALL_BOLD:
 294             uifont = [UIFont boldSystemFontOfSize:[UIFont smallSystemFontSize]];
 295             break;
 296         case wxOSX_SYSTEM_FONT_VIEWS:
 297         case wxOSX_SYSTEM_FONT_LABELS:
 298             uifont = [UIFont systemFontOfSize:[UIFont labelFontSize]];
 299             break;
 300         default:
 301             break;
 302     }
 303     [uifont retain];
 304     if ( info->m_faceName.empty())
 305     {
 306         wxFontStyle fontstyle = wxFONTSTYLE_NORMAL;
 307         wxFontWeight fontweight = wxFONTWEIGHT_NORMAL;
 308         bool underlined = false;
 309
 310         int size = (int) ([uifont pointSize]+0.5);
 311         /*
 312         NSFontSymbolicTraits traits = [desc symbolicTraits];
 313
 314         if ( traits & NSFontBoldTrait )
 315             fontweight = wxFONTWEIGHT_BOLD ;
 316         else
 317             fontweight = wxFONTWEIGHT_NORMAL ;
 318         if ( traits & NSFontItalicTrait )
 319             fontstyle = wxFONTSTYLE_ITALIC ;
 320         */
 321         wxCFStringRef fontname( wxCFRetain([uifont familyName]) );
 322         info->Init(size,wxFONTFAMILY_DEFAULT,fontstyle,fontweight,underlined,
 323             fontname.AsString(), wxFONTENCODING_DEFAULT);
 324
 325     }
 326     return uifont;
 327 }
 328
 329 WX_UIFont wxFont::OSXCreateUIFont(const wxNativeFontInfo* info)
 330 {
 331     UIFont* uiFont;
 332     uiFont = [UIFont fontWithName:wxCFStringRef(info->m_faceName).AsNSString() size:info->m_pointSize];
 333     wxMacCocoaRetain(uiFont);
 334     return uiFont;
 335 }
 336
 337 #endif
 338 // ----------------------------------------------------------------------------
 339 // NSImage Utils
 340 // ----------------------------------------------------------------------------
 341
 342 #if wxOSX_USE_IPHONE
 343
 344 WX_UIImage  wxOSXGetUIImageFromCGImage( CGImageRef image )
 345 {
 346     UIImage  *newImage = [UIImage imageWithCGImage:image];
 347     [newImage autorelease];
 348     return( newImage );
 349 }
 350
 351 #endif
 352
 353 #if wxOSX_USE_COCOA
 354
 355 //  From "Cocoa Drawing Guide:Working with Images"
 356 WX_NSImage  wxOSXGetNSImageFromCGImage( CGImageRef image )
 357 {
 358     NSRect      imageRect    = NSMakeRect(0.0, 0.0, 0.0, 0.0);
 359
 360     // Get the image dimensions.
 361     imageRect.size.height = CGImageGetHeight(image);
 362     imageRect.size.width = CGImageGetWidth(image);
 363
 364     // Create a new image to receive the Quartz image data.
 365     NSImage  *newImage = [[NSImage alloc] initWithSize:imageRect.size];
 366     [newImage lockFocus];
 367
 368     // Get the Quartz context and draw.
 369     CGContextRef  imageContext = (CGContextRef) [[NSGraphicsContext currentContext] graphicsPort];
 370     CGContextDrawImage( imageContext, *(CGRect*)&imageRect, image );
 371     [newImage unlockFocus];
 372
 373     /*
 374         // Create a bitmap rep from the image...
 375         NSBitmapImageRep *bitmapRep = [[NSBitmapImageRep alloc] initWithCGImage:cgImage];
 376         // Create an NSImage and add the bitmap rep to it...
 377         NSImage *image = [[NSImage alloc] init];
 378         [image addRepresentation:bitmapRep];
 379         [bitmapRep release];
 380     */
 381     [newImage autorelease];
 382     return( newImage );
 383 }
 384
 385 CGImageRef wxOSXCreateCGImageFromNSImage( WX_NSImage nsimage )
 386 {
 387     // based on http://www.mail-archive.com/cocoa-dev@lists.apple.com/msg18065.html
 388
 389     NSSize imageSize = [nsimage size];
 390     CGColorSpaceRef genericRGB = CGColorSpaceCreateWithName(kCGColorSpaceGenericRGB);
 391     CGContextRef context = CGBitmapContextCreate(NULL, imageSize.width, imageSize.height, 8, 0, genericRGB, kCGImageAlphaPremultipliedFirst);
 392     NSGraphicsContext *nsGraphicsContext = [NSGraphicsContext graphicsContextWithGraphicsPort:context flipped:NO];
 393     [NSGraphicsContext saveGraphicsState];
 394     [NSGraphicsContext setCurrentContext:nsGraphicsContext];
 395     [[NSColor whiteColor] setFill];
 396     NSRectFill(NSMakeRect(0.0, 0.0, imageSize.width, imageSize.height));
 397     [nsimage drawAtPoint:NSZeroPoint fromRect:NSZeroRect operation:NSCompositeCopy fraction:1.0];
 398     [NSGraphicsContext setCurrentContext:nsGraphicsContext];
 399     CGImageRef image = CGBitmapContextCreateImage(context);
 400     CFRelease(context);
 401     return image;
 402  }
 403
 404 // ----------------------------------------------------------------------------
 405 // NSCursor Utils
 406 // ----------------------------------------------------------------------------
 407
 408 // copied from cursor.mm
 409
 410 static NSCursor* wxGetStockCursor( short sIndex )
 411 {
 412     ClassicCursor* pCursor = &gMacCursors[sIndex];
 413
 414     //Classic mac cursors are 1bps 16x16 black and white with a
 415     //identical mask that is 1 for on and 0 for off
 416     NSImage *theImage = [[NSImage alloc] initWithSize:NSMakeSize(16.0,16.0)];
 417
 418     //NSCursor takes an NSImage takes a number of Representations - here
 419     //we need only one for the raw data
 420     NSBitmapImageRep *theRep = [[NSBitmapImageRep alloc]
 421         initWithBitmapDataPlanes: NULL  // Tell Cocoa to allocate the planes for us.
 422         pixelsWide: 16      // All classic cursors are 16x16
 423         pixelsHigh: 16
 424         bitsPerSample: 1    // All classic cursors are bitmaps with bitmasks
 425         samplesPerPixel: 2  // Sample 0:image 1:mask
 426         hasAlpha: YES       // Identify last sample as a mask
 427         isPlanar: YES       // Use a separate array for each sample
 428         colorSpaceName: NSCalibratedWhiteColorSpace // 0.0=black 1.0=white
 429         bytesPerRow: 2      // Rows in each plane are on 2-byte boundaries (no pad)
 430         bitsPerPixel: 1];   // same as bitsPerSample since data is planar
 431
 432     // Ensure that Cocoa allocated 2 and only 2 of the 5 possible planes
 433     unsigned char *planes[5];
 434     [theRep getBitmapDataPlanes:planes];
 435     wxASSERT(planes[0] != NULL);
 436     wxASSERT(planes[1] != NULL);
 437     wxASSERT(planes[2] == NULL);
 438     wxASSERT(planes[3] == NULL);
 439     wxASSERT(planes[4] == NULL);
 440
 441     // NOTE1: The Cursor's bits field is white=0 black=1.. thus the bitwise-not
 442     // Why not use NSCalibratedBlackColorSpace?  Because that reverses the
 443     // sense of the alpha (mask) plane.
 444     // NOTE2: The mask data is 0=off 1=on
 445     // NOTE3: Cocoa asks for "premultiplied" color planes.  Since we have a
 446     // 1-bit color plane and a 1-bit alpha plane we can just do a bitwise-and
 447     // on the two.  The original cursor bitmaps have 0 (white actually) for
 448     // any masked-off pixels.  Therefore every masked-off pixel would be wrong
 449     // since we bit-flip all of the picture bits.  In practice, Cocoa doesn't
 450     // seem to care, but we are following the documentation.
 451
 452     // Fill in the color (black/white) plane
 453     for(int i=0; i<16; ++i)
 454     {
 455         planes[0][2*i  ] = (~pCursor->bits[i] & pCursor->mask[i]) >> 8 & 0xff;
 456         planes[0][2*i+1] = (~pCursor->bits[i] & pCursor->mask[i]) & 0xff;
 457     }
 458     // Fill in the alpha (i.e. mask) plane
 459     for(int i=0; i<16; ++i)
 460     {
 461         planes[1][2*i  ] = pCursor->mask[i] >> 8 & 0xff;
 462         planes[1][2*i+1] = pCursor->mask[i] & 0xff;
 463     }
 464
 465     //add the representation (data) to the image
 466     [theImage addRepresentation:theRep];
 467
 468     //create the new cursor
 469     NSCursor* theCursor =  [[NSCursor alloc]  initWithImage:theImage
 470                                     hotSpot:NSMakePoint(pCursor->hotspot[1], pCursor->hotspot[0])
 471                             ];
 472
 473     //do the usual cleanups
 474     [theRep release];
 475     [theImage release];
 476
 477     //return the new cursor
 478     return theCursor;
 479 }
 480
 481 WX_NSCursor wxMacCocoaCreateStockCursor( int cursor_type )
 482 {
 483     WX_NSCursor cursor = nil;
 484     switch (cursor_type)
 485     {
 486     case wxCURSOR_COPY_ARROW:
 487         cursor = [[NSCursor arrowCursor] retain];
 488         break;
 489
 490     case wxCURSOR_WATCH:
 491     case wxCURSOR_WAIT:
 492         // should be displayed by the system when things are running
 493         cursor = [[NSCursor arrowCursor] retain];
 494         break;
 495
 496     case wxCURSOR_IBEAM:
 497         cursor = [[NSCursor IBeamCursor] retain];
 498         break;
 499
 500     case wxCURSOR_CROSS:
 501         cursor = [[NSCursor crosshairCursor] retain];
 502         break;
 503
 504     case wxCURSOR_SIZENWSE:
 505         cursor = wxGetStockCursor(kwxCursorSizeNWSE);
 506         break;
 507
 508     case wxCURSOR_SIZENESW:
 509         cursor = wxGetStockCursor(kwxCursorSizeNESW);
 510         break;
 511
 512     case wxCURSOR_SIZEWE:
 513         cursor = [[NSCursor resizeLeftRightCursor] retain];
 514         break;
 515
 516     case wxCURSOR_SIZENS:
 517         cursor = [[NSCursor resizeUpDownCursor] retain];
 518         break;
 519
 520     case wxCURSOR_SIZING:
 521         cursor = wxGetStockCursor(kwxCursorSize);
 522         break;
 523
 524     case wxCURSOR_HAND:
 525         cursor = [[NSCursor pointingHandCursor] retain];
 526         break;
 527
 528     case wxCURSOR_BULLSEYE:
 529         cursor = wxGetStockCursor(kwxCursorBullseye);
 530         break;
 531
 532     case wxCURSOR_PENCIL:
 533         cursor = wxGetStockCursor(kwxCursorPencil);
 534         break;
 535
 536     case wxCURSOR_MAGNIFIER:
 537         cursor = wxGetStockCursor(kwxCursorMagnifier);
 538         break;
 539
 540     case wxCURSOR_NO_ENTRY:
 541         cursor = wxGetStockCursor(kwxCursorNoEntry);
 542         break;
 543
 544     case wxCURSOR_PAINT_BRUSH:
 545         cursor = wxGetStockCursor(kwxCursorPaintBrush);
 546         break;
 547
 548     case wxCURSOR_POINT_LEFT:
 549         cursor = wxGetStockCursor(kwxCursorPointLeft);
 550         break;
 551
 552     case wxCURSOR_POINT_RIGHT:
 553         cursor = wxGetStockCursor(kwxCursorPointRight);
 554         break;
 555
 556     case wxCURSOR_QUESTION_ARROW:
 557         cursor = wxGetStockCursor(kwxCursorQuestionArrow);
 558         break;
 559
 560     case wxCURSOR_BLANK:
 561         cursor = wxGetStockCursor(kwxCursorBlank);
 562         break;
 563
 564     case wxCURSOR_RIGHT_ARROW:
 565         cursor = wxGetStockCursor(kwxCursorRightArrow);
 566         break;
 567
 568     case wxCURSOR_SPRAYCAN:
 569         cursor = wxGetStockCursor(kwxCursorRoller);
 570         break;
 571
 572     case wxCURSOR_OPEN_HAND:
 573         cursor = [[NSCursor openHandCursor] retain];
 574         break;
 575
 576     case wxCURSOR_CLOSED_HAND:
 577         cursor = [[NSCursor closedHandCursor] retain];
 578         break;
 579
 580     case wxCURSOR_CHAR:
 581     case wxCURSOR_ARROW:
 582     case wxCURSOR_LEFT_BUTTON:
 583     case wxCURSOR_RIGHT_BUTTON:
 584     case wxCURSOR_MIDDLE_BUTTON:
 585     default:
 586         cursor = [[NSCursor arrowCursor] retain];
 587         break;
 588     }
 589     return cursor;
 590 }
 591
 592 //  C-based style wrapper routines around NSCursor
 593 WX_NSCursor  wxMacCocoaCreateCursorFromCGImage( CGImageRef cgImageRef, float hotSpotX, float hotSpotY )
 594 {
 595     static BOOL    firstTime  = YES;
 596
 597     if ( firstTime )
 598     {
 599         //  Must first call [[[NSWindow alloc] init] release] to get the NSWindow machinery set up so that NSCursor can use a window to cache the cursor image
 600         [[[NSWindow alloc] init] release];
 601         firstTime = NO;
 602     }
 603
 604     NSImage    *nsImage  = wxOSXGetNSImageFromCGImage( cgImageRef );
 605     NSCursor  *cursor    = [[NSCursor alloc] initWithImage:nsImage hotSpot:NSMakePoint( hotSpotX, hotSpotY )];
 606
 607     return cursor;
 608 }
 609
 610 void  wxMacCocoaSetCursor( WX_NSCursor cursor )
 611 {
 612     [cursor set];
 613 }
 614
 615 void  wxMacCocoaHideCursor()
 616 {
 617     [NSCursor hide];
 618 }
 619
 620 void  wxMacCocoaShowCursor()
 621 {
 622     [NSCursor unhide];
 623 }
 624
 625 #endif
 626