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     NSRange glyphRange = [sm_cocoaNSLayoutManager glyphRangeForTextContainer:sm_cocoaNSTextContainer];
 114     NSRect usedRect = [sm_cocoaNSLayoutManager usedRectForTextContainer:sm_cocoaNSTextContainer];
 115     // NOTE: We'll crash trying to get the location of glyphAtIndex:0 if
 116     // there is no length or we don't start at zero
 117     if(!glyphRange.length)
 118         return;
 119     wxASSERT_MSG(glyphRange.location==0,"glyphRange must begin at zero");
 120
 121     NSAffineTransform *transform = [NSAffineTransform transform];
 122     [transform translateXBy:x yBy:y];
 123
 124     NSAffineTransform *flipTransform = [NSAffineTransform transform];
 125     /*  x' = 1x + 0y + 0
 126         y' = 0x + -1y + window's height
 127     */
 128     NSAffineTransformStruct matrix = {
 129         1,  0
 130     ,   0, -1
 131     ,   0, usedRect.size.height
 132     };
 133     [flipTransform setTransformStruct: matrix];
 134
 135     NSGraphicsContext *context = [NSGraphicsContext currentContext];
 136     [context saveGraphicsState];
 137     [transform concat];
 138     [flipTransform concat];
 139     #if 0
 140     // Draw+fill a rectangle so we can see where the shit is supposed to be.
 141     wxLogDebug("(%f,%f) (%fx%f)",usedRect.origin.x,usedRect.origin.y,usedRect.size.width,usedRect.size.height);
 142     NSBezierPath *bezpath = [NSBezierPath bezierPathWithRect:NSMakeRect(0,0,usedRect.size.width,usedRect.size.height)];
 143     [[NSColor blackColor] set];
 144     [bezpath stroke];
 145     [[NSColor blueColor] set];
 146     [bezpath fill];
 147     #endif
 148
 149     NSPoint layoutLocation = [sm_cocoaNSLayoutManager locationForGlyphAtIndex:0];
 150     layoutLocation.x = 0.0;
 151     layoutLocation.y *= -1.0;
 152     layoutLocation.y += [[sm_cocoaNSLayoutManager typesetter] baselineOffsetInLayoutManager:sm_cocoaNSLayoutManager glyphIndex:0];
 153     // NOTE: That's NSMakePoint, not NSMakePint (working on that though)
 154     [m_textForegroundColour.GetNSColor() set];
 155     [sm_cocoaNSLayoutManager drawGlyphsForGlyphRange:glyphRange  atPoint:layoutLocation];
 156
 157     [context restoreGraphicsState];
 158 }
 159
 160 // wxDCBase functions
 161 int wxDCBase::DeviceToLogicalX(int x) const
 162 {
 163     return x;
 164 }
 165
 166 int wxDCBase::DeviceToLogicalY(int y) const
 167 {
 168     return y;
 169 }
 170
 171 int wxDCBase::LogicalToDeviceX(int x) const
 172 {
 173     return x;
 174 }
 175
 176 int wxDCBase::LogicalToDeviceY(int y) const
 177 {
 178     return y;
 179 }
 180
 181 ///////////////////////////////////////////////////////////////////////////
 182 // cut here, the rest is stubs
 183 ///////////////////////////////////////////////////////////////////////////
 184
 185 //-----------------------------------------------------------------------------
 186 // constants
 187 //-----------------------------------------------------------------------------
 188
 189 #define mm2inches               0.0393700787402
 190 #define inches2mm               25.4
 191 #define mm2twips                56.6929133859
 192 #define twips2mm                0.0176388888889
 193 #define mm2pt                   2.83464566929
 194 #define pt2mm                   0.352777777778
 195
 196 //-----------------------------------------------------------------------------
 197 // wxDC
 198 //-----------------------------------------------------------------------------
 199
 200 void wxDC::DoDrawIcon( const wxIcon &WXUNUSED(icon), int WXUNUSED(x), int WXUNUSED(y) )
 201 {
 202 };
 203
 204 void wxDC::DoDrawPoint( int x, int y )
 205 {
 206 };
 207
 208 void wxDC::DoDrawPolygon( int, wxPoint *, int, int, int)
 209 {
 210 };
 211
 212 void wxDC::DoDrawLines( int, wxPoint *, int, int )
 213 {
 214 }
 215
 216 int wxDC::GetDepth() const
 217 {
 218     return 0;
 219 }
 220
 221 wxSize wxDC::GetPPI() const
 222 {
 223     return wxSize(0,0);
 224 }
 225
 226 bool wxDC::CanGetTextExtent() const
 227 {
 228     return false;
 229 }
 230
 231 wxCoord wxDC::GetCharHeight() const
 232 {
 233     return 0;
 234 }
 235
 236 wxCoord wxDC::GetCharWidth() const
 237 {
 238     return 0;
 239 }
 240
 241 bool wxDC::CanDrawBitmap() const
 242 {
 243     return false;
 244 }
 245
 246 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
 247 {
 248     return false;
 249 }
 250
 251 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord xc, wxCoord yc)
 252 {
 253 }
 254
 255 void wxDC::SetPen(const wxPen& pen)
 256 {
 257 }
 258
 259 void wxDC::SetBrush(const wxBrush& brush)
 260 {
 261     m_brush = brush;
 262 }
 263
 264 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
 265 {
 266 }
 267
 268 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 269 {
 270 }
 271
 272 void wxDC::DestroyClippingRegion()
 273 {
 274 }
 275
 276 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
 277 {
 278 }
 279
 280 void wxDC::DoDrawRotatedText(const wxString& text, wxCoord x, wxCoord y, double angle)
 281 {
 282 }
 283
 284 void wxDC::DoDrawEllipticArc(wxCoord x, wxCoord y, wxCoord w, wxCoord h, double sa, double ea)
 285 {
 286 }
 287
 288 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
 289 {
 290 }
 291
 292 void wxDC::DoDrawBitmap(const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask)
 293 {
 294 }
 295
 296 bool wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
 297 {
 298     return false;
 299 }
 300
 301 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
 302 {
 303 }
 304
 305
 306 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)
 307 {
 308     return false;
 309 }
 310
 311 void wxDC::DoGetSize( int* width, int* height ) const
 312 {
 313   *width = m_maxX-m_minX;
 314   *height = m_maxY-m_minY;
 315 };
 316
 317 void wxDC::DoGetSizeMM( int* width, int* height ) const
 318 {
 319   int w = 0;
 320   int h = 0;
 321   GetSize( &w, &h );
 322 };
 323
 324 void wxDC::SetTextForeground( const wxColour &col )
 325 {
 326   if (!Ok()) return;
 327   m_textForegroundColour = col;
 328 };
 329
 330 void wxDC::SetTextBackground( const wxColour &col )
 331 {
 332   if (!Ok()) return;
 333   m_textBackgroundColour = col;
 334 };
 335
 336 void wxDC::Clear()
 337 {
 338 }
 339
 340 void wxDC::SetBackground(const wxBrush& brush)
 341 {
 342     m_backgroundBrush = brush;
 343 }
 344
 345 void wxDC::SetPalette(const wxPalette&)
 346 {
 347 }
 348
 349 void wxDC::SetLogicalFunction(int)
 350 {
 351 }
 352
 353
 354 void wxDC::SetMapMode( int mode )
 355 {
 356   switch (mode)
 357   {
 358     case wxMM_TWIPS:
 359       break;
 360     case wxMM_POINTS:
 361       break;
 362     case wxMM_METRIC:
 363       break;
 364     case wxMM_LOMETRIC:
 365       break;
 366     default:
 367     case wxMM_TEXT:
 368       SetLogicalScale( 1.0, 1.0 );
 369       break;
 370   };
 371   if (mode != wxMM_TEXT)
 372   {
 373   };
 374 };
 375
 376 void wxDC::SetUserScale( double x, double y )
 377 {
 378   // allow negative ? -> no
 379   m_userScaleX = x;
 380   m_userScaleY = y;
 381   ComputeScaleAndOrigin();
 382 };
 383
 384 void wxDC::SetLogicalScale( double x, double y )
 385 {
 386   // allow negative ?
 387   m_logicalScaleX = x;
 388   m_logicalScaleY = y;
 389   ComputeScaleAndOrigin();
 390 };
 391
 392 void wxDC::SetLogicalOrigin( wxCoord x, wxCoord y )
 393 {
 394   m_logicalOriginX = x * m_signX;   // is this still correct ?
 395   m_logicalOriginY = y * m_signY;
 396   ComputeScaleAndOrigin();
 397 };
 398
 399 void wxDC::SetDeviceOrigin( wxCoord x, wxCoord y )
 400 {
 401   ComputeScaleAndOrigin();
 402 };
 403
 404 void wxDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
 405 {
 406   m_signX = (xLeftRight ?  1 : -1);
 407   m_signY = (yBottomUp  ? -1 :  1);
 408   ComputeScaleAndOrigin();
 409 };
 410
 411 void wxDC::ComputeScaleAndOrigin(void)
 412 {
 413   // CMB: copy scale to see if it changes
 414   double origScaleX = m_scaleX;
 415   double origScaleY = m_scaleY;
 416
 417   m_scaleX = m_logicalScaleX * m_userScaleX;
 418   m_scaleY = m_logicalScaleY * m_userScaleY;
 419
 420   // CMB: if scale has changed call SetPen to recalulate the line width
 421   if (m_scaleX != origScaleX || m_scaleY != origScaleY)
 422   {
 423     // this is a bit artificial, but we need to force wxDC to think
 424     // the pen has changed
 425     wxPen* pen = & GetPen();
 426     wxPen tempPen;
 427     m_pen = tempPen;
 428     SetPen(* pen);
 429   }
 430 };
 431