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/dc.h"
  13 #include "wx/log.h"
  14
  15 #import <AppKit/NSBezierPath.h>
  16 #import <AppKit/NSTextStorage.h>
  17 #import <AppKit/NSLayoutManager.h>
  18 #import <AppKit/NSTextContainer.h>
  19 #import <AppKit/NSGraphicsContext.h>
  20 #import <AppKit/NSAffineTransform.h>
  21 #import <AppKit/NSColor.h>
  22 #import <AppKit/NSTypeSetter.h>
  23
  24 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
  25 wxDC *wxDC::sm_focusedDC = NULL;
  26 WX_NSTextStorage wxDC::sm_cocoaNSTextStorage = nil;
  27 WX_NSLayoutManager wxDC::sm_cocoaNSLayoutManager = nil;
  28 WX_NSTextContainer wxDC::sm_cocoaNSTextContainer = nil;
  29
  30 void wxDC::CocoaInitializeTextSystem()
  31 {
  32     wxASSERT_MSG(!sm_cocoaNSTextStorage && !sm_cocoaNSLayoutManager && !sm_cocoaNSTextContainer,"Text system already initalized!  BAD PROGRAMMER!");
  33
  34     sm_cocoaNSTextStorage = [[NSTextStorage alloc] init];
  35
  36     sm_cocoaNSLayoutManager = [[NSLayoutManager alloc] init];
  37     [sm_cocoaNSTextStorage addLayoutManager:sm_cocoaNSLayoutManager];
  38     // NSTextStorage retains NSLayoutManager, but so do we
  39     // [sm_cocoaNSLayoutManager release]; [sm_cocoaNSLayoutManager retain];
  40
  41     // NOTE:  initWithContainerSize is the designated initializer, but the
  42     // Apple CircleView sample gets away with just calling init, which
  43     // is all we really need for our purposes.
  44     sm_cocoaNSTextContainer = [[NSTextContainer alloc] init];
  45     [sm_cocoaNSLayoutManager addTextContainer:sm_cocoaNSTextContainer];
  46     // NSLayoutManager retains NSTextContainer, but so do we
  47     // [sm_cocoaNSTextContainer release]; [sm_cocoaNSTextContainer retain];
  48 }
  49
  50 void wxDC::CocoaShutdownTextSystem()
  51 {
  52     [sm_cocoaNSTextContainer release]; sm_cocoaNSTextContainer = nil;
  53     [sm_cocoaNSLayoutManager release]; sm_cocoaNSLayoutManager = nil;
  54     [sm_cocoaNSTextStorage release]; sm_cocoaNSTextStorage = nil;
  55 }
  56
  57 wxDC::wxDC(void)
  58 {
  59 }
  60
  61 wxDC::~wxDC(void)
  62 {
  63 }
  64
  65 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
  66 {
  67     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(x,y,width,height)];
  68     [m_textForegroundColour.GetNSColor() set];
  69     [bezpath stroke];
  70     [m_brush.GetNSColor() set];
  71     [bezpath fill];
  72 }
  73
  74 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
  75 {
  76     NSBezierPath *bezpath = [NSBezierPath bezierPath];
  77     [bezpath moveToPoint:NSMakePoint(x1,y1)];
  78     [bezpath lineToPoint:NSMakePoint(x2,y2)];
  79
  80     [m_textForegroundColour.GetNSColor() set];
  81     [bezpath stroke];
  82 }
  83
  84 void wxDC::DoGetTextExtent(const wxString& text, wxCoord *x, wxCoord *y, wxCoord *descent, wxCoord *externalLeading, wxFont *theFont) const
  85 {
  86 // FIXME: Cache this so it can be used for DoDrawText
  87     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, "Text system has not been initialized.  BAD PROGRAMMER!");
  88     NSAttributedString *attributedString = [[NSAttributedString alloc]
  89             initWithString:[NSString stringWithCString:text.c_str()]];
  90     [sm_cocoaNSTextStorage setAttributedString:attributedString];
  91     [attributedString release];
  92
  93     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
  94     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
  95     if(x)
  96         *x=(int)usedRect.size.width;
  97     if(y)
  98         *y=(int)usedRect.size.height;
  99     if(descent)
 100         *descent=0;
 101     if(externalLeading)
 102         *externalLeading=0;
 103 }
 104
 105 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
 106 {
 107     wxASSERT_MSG(sm_cocoaNSTextStorage && sm_cocoaNSLayoutManager && sm_cocoaNSTextContainer, "Text system has not been initialized.  BAD PROGRAMMER!");
 108     NSAttributedString *attributedString = [[NSAttributedString alloc]
 109             initWithString:[NSString stringWithCString:text.c_str()]];
 110     [sm_cocoaNSTextStorage setAttributedString:attributedString];
 111     [attributedString release];
 112
 113     // Set the color (and later font) attributes
 114     NSColor *fgColor = m_textForegroundColour.GetNSColor();
 115     NSColor *bgColor = m_textBackgroundColour.GetNSColor();
 116     if(!fgColor)
 117         fgColor = [NSColor clearColor];
 118     if(!bgColor)
 119         bgColor = [NSColor clearColor];
 120     NSDictionary *attrDict = [[NSDictionary alloc] initWithObjectsAndKeys:
 121             fgColor, NSForegroundColorAttributeName,
 122             bgColor, NSBackgroundColorAttributeName,
 123             nil];
 124     [sm_cocoaNSTextStorage addAttributes: attrDict range:NSMakeRange(0,[sm_cocoaNSTextStorage length])];
 125     [attrDict release];
 126
 127     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 128     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 129     // NOTE: We'll crash trying to get the location of glyphAtIndex:0 if
 130     // there is no length or we don't start at zero
 131     if(!glyphRange.length)
 132         return;
 133     wxASSERT_MSG(glyphRange.location==0,"glyphRange must begin at zero");
 134
 135     NSAffineTransform *transform = [NSAffineTransform transform];
 136     [transform translateXBy:x yBy:y];
 137
 138     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 139     /*  x' = 1x + 0y + 0
 140         y' = 0x + -1y + window's height
 141     */
 142     NSAffineTransformStruct matrix = {
 143         1,  0
 144     ,   0, -1
 145     ,   0, usedRect.size.height
 146     };
 147     [flipTransform setTransformStruct: matrix];
 148
 149     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 150     [context saveGraphicsState];
 151     [transform concat];
 152     [flipTransform concat];
 153     #if 0
 154     // Draw+fill a rectangle so we can see where the shit is supposed to be.
 155     wxLogDebug("(%f,%f) (%fx%f)",usedRect.origin.x,usedRect.origin.y,usedRect.size.width,usedRect.size.height);
 156     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(0,0,usedRect.size.width,usedRect.size.height)];
 157     [[NSColor blackColor] set];
 158     [bezpath stroke];
 159     [[NSColor blueColor] set];
 160     [bezpath fill];
 161     #endif
 162
 163     NSPoint layoutLocation = [sm_cocoaNSLayoutManager locationForGlyphAtIndex:0];
 164     layoutLocation.x = 0.0;
 165     layoutLocation.y *= -1.0;
 166     layoutLocation.y += [[sm_cocoaNSLayoutManager typesetter] baselineOffsetInLayoutManager:sm_cocoaNSLayoutManager glyphIndex:0];
 167     if(m_backgroundMode==wxSOLID)
 168         [sm_cocoaNSLayoutManager drawBackgroundForGlyphRange:glyphRange  atPoint:NSZeroPoint];
 169     [sm_cocoaNSLayoutManager drawGlyphsForGlyphRange:glyphRange  atPoint:layoutLocation];
 170
 171     [context restoreGraphicsState];
 172 }
 173
 174 // wxDCBase functions
 175 int wxDCBase::DeviceToLogicalX(int x) const
 176 {
 177     return x;
 178 }
 179
 180 int wxDCBase::DeviceToLogicalY(int y) const
 181 {
 182     return y;
 183 }
 184
 185 int wxDCBase::LogicalToDeviceX(int x) const
 186 {
 187     return x;
 188 }
 189
 190 int wxDCBase::LogicalToDeviceY(int y) const
 191 {
 192     return y;
 193 }
 194
 195 ///////////////////////////////////////////////////////////////////////////
 196 // cut here, the rest is stubs
 197 ///////////////////////////////////////////////////////////////////////////
 198
 199 //-----------------------------------------------------------------------------
 200 // constants
 201 //-----------------------------------------------------------------------------
 202
 203 #define mm2inches               0.0393700787402
 204 #define inches2mm               25.4
 205 #define mm2twips                56.6929133859
 206 #define twips2mm                0.0176388888889
 207 #define mm2pt                   2.83464566929
 208 #define pt2mm                   0.352777777778
 209
 210 //-----------------------------------------------------------------------------
 211 // wxDC
 212 //-----------------------------------------------------------------------------
 213
 214 void wxDC::DoDrawIcon( const wxIcon &WXUNUSED(icon), int WXUNUSED(x), int WXUNUSED(y) )
 215 {
 216 };
 217
 218 void wxDC::DoDrawPoint( int x, int y )
 219 {
 220 };
 221
 222 void wxDC::DoDrawPolygon( int, wxPoint *, int, int, int)
 223 {
 224 };
 225
 226 void wxDC::DoDrawLines( int, wxPoint *, int, int )
 227 {
 228 }
 229
 230 int wxDC::GetDepth() const
 231 {
 232     return 0;
 233 }
 234
 235 wxSize wxDC::GetPPI() const
 236 {
 237     return wxSize(0,0);
 238 }
 239
 240 bool wxDC::CanGetTextExtent() const
 241 {
 242     return false;
 243 }
 244
 245 wxCoord wxDC::GetCharHeight() const
 246 {
 247     return 0;
 248 }
 249
 250 wxCoord wxDC::GetCharWidth() const
 251 {
 252     return 0;
 253 }
 254
 255 bool wxDC::CanDrawBitmap() const
 256 {
 257     return false;
 258 }
 259
 260 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 261 {
 262     return false;
 263 }
 264
 265 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 266 {
 267 }
 268
 269 void wxDC::SetPen(const wxPen& pen)
 270 {
 271 }
 272
 273 void wxDC::SetBrush(const wxBrush& brush)
 274 {
 275     m_brush = brush;
 276 }
 277
 278 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 279 {
 280 }
 281
 282 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 283 {
 284 }
 285
 286 void wxDC::DestroyClippingRegion()
 287 {
 288 }
 289
 290 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 291 {
 292 }
 293
 294 void wxDC::DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 295 {
 296 }
 297
 298 void wxDC::DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea)
 299 {
 300 }
 301
 302 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 303 {
 304 }
 305
 306 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 307 {
 308 }
 309
 310 bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
 311 {
 312     return false;
 313 }
 314
 315 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 316 {
 317 }
 318
 319
 320 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)
 321 {
 322     return false;
 323 }
 324
 325 void wxDC::DoGetSize( int* width, int* height ) const
 326 {
 327   *width = m_maxX-m_minX;
 328   *height = m_maxY-m_minY;
 329 };
 330
 331 void wxDC::DoGetSizeMM( int* width, int* height ) const
 332 {
 333   int w = 0;
 334   int h = 0;
 335   GetSize( &w, &h );
 336 };
 337
 338 void wxDC::SetTextForeground( const wxColour &col )
 339 {
 340   if (!Ok()) return;
 341   m_textForegroundColour = col;
 342 };
 343
 344 void wxDC::SetTextBackground( const wxColour &col )
 345 {
 346   if (!Ok()) return;
 347   m_textBackgroundColour = col;
 348 };
 349
 350 void wxDC::Clear()
 351 {
 352 }
 353
 354 void wxDC::SetBackground(const wxBrush& brush)
 355 {
 356     m_backgroundBrush = brush;
 357 }
 358
 359 void wxDC::SetPalette(const wxPalette&)
 360 {
 361 }
 362
 363 void wxDC::SetLogicalFunction(int)
 364 {
 365 }
 366
 367
 368 void wxDC::SetMapMode( int mode )
 369 {
 370   switch (mode)
 371   {
 372     case wxMM_TWIPS:
 373       break;
 374     case wxMM_POINTS:
 375       break;
 376     case wxMM_METRIC:
 377       break;
 378     case wxMM_LOMETRIC:
 379       break;
 380     default:
 381     case wxMM_TEXT:
 382       SetLogicalScale( 1.0, 1.0 );
 383       break;
 384   };
 385   if (mode != wxMM_TEXT)
 386   {
 387   };
 388 };
 389
 390 void wxDC::SetUserScale( double x, double y )
 391 {
 392   // allow negative ? -> no
 393   m_userScaleX = x;
 394   m_userScaleY = y;
 395   ComputeScaleAndOrigin();
 396 };
 397
 398 void wxDC::SetLogicalScale( double x, double y )
 399 {
 400   // allow negative ?
 401   m_logicalScaleX = x;
 402   m_logicalScaleY = y;
 403   ComputeScaleAndOrigin();
 404 };
 405
 406 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 407 {
 408   m_logicalOriginX = x * m_signX;   // is this still correct ?
 409   m_logicalOriginY = y * m_signY;
 410   ComputeScaleAndOrigin();
 411 };
 412
 413 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 414 {
 415   ComputeScaleAndOrigin();
 416 };
 417
 418 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 419 {
 420   m_signX = (xLeftRight ?  1 : -1);
 421   m_signY = (yBottomUp  ? -1 :  1);
 422   ComputeScaleAndOrigin();
 423 };
 424
 425 void wxDC::ComputeScaleAndOrigin(void)
 426 {
 427   // CMB: copy scale to see if it changes
 428   double origScaleX = m_scaleX;
 429   double origScaleY = m_scaleY;
 430
 431   m_scaleX = m_logicalScaleX * m_userScaleX;
 432   m_scaleY = m_logicalScaleY * m_userScaleY;
 433
 434   // CMB: if scale has changed call SetPen to recalulate the line width
 435   if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 436   {
 437     // this is a bit artificial, but we need to force wxDC to think
 438     // the pen has changed
 439     wxPen* pen = & GetPen();
 440     wxPen tempPen;
 441     m_pen = tempPen;
 442     SetPen(* pen);
 443   }
 444 };
 445