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