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