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[wxWidgets.git] / src / gtk / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dc.cpp
3 // Purpose:
4 // Author: Robert Roebling
5 // RCS-ID: $Id$
6 // Copyright: (c) 1998 Robert Roebling
7 // Licence: wxWindows licence
8 /////////////////////////////////////////////////////////////////////////////
9
10 // For compilers that support precompilation, includes "wx.h".
11 #include "wx/wxprec.h"
12
13 #include "wx/dc.h"
14
15
16 #if wxUSE_NEW_DC
17
18 //----------------------------------------------------------------------------
19 // wxDCFactory
20 //----------------------------------------------------------------------------
21
22 wxDCFactory *wxDCFactory::m_factory = NULL;
23
24 void wxDCFactory::SetDCFactory( wxDCFactory *factory )
25 {
26 if (wxDCFactory::m_factory)
27 delete wxDCFactory::m_factory;
28
29 wxDCFactory::m_factory = factory;
30 }
31
32 wxDCFactory *wxDCFactory::GetFactory()
33 {
34 if (!wxDCFactory::m_factory)
35 wxDCFactory::m_factory = new wxNativeDCFactory;
36
37 return wxDCFactory::m_factory;
38 }
39
40 //-----------------------------------------------------------------------------
41 // wxNativeDCFactory
42 //-----------------------------------------------------------------------------
43
44 wxImplDC* wxNativeDCFactory::CreateWindowDC( wxWindow *window )
45 {
46 #if defined(__WXMSW__)
47 return new wxWindowsWindowImplDC( window );
48 #elif defined(__WXGTK20__)
49 return new wxGTKWindowImplDC( window );
50 #elif defined(__WXGTK__)
51 return new wxGTKWindowImplDC( window );
52 #elif defined(__WXMAC__)
53 return new wxMacWindowImplDC( window );
54 #elif defined(__WXCOCOA__)
55 return new wxCocoaWindowImplDC( window );
56 #elif defined(__WXMOTIF__)
57 return new wxMotifWindowImplDC( window );
58 #elif defined(__WXX11__)
59 return new wxX11WindowImplDC( window );
60 #elif defined(__WXMGL__)
61 return new wxMGLWindowImplDC( window );
62 #elif defined(__WXDFB__)
63 return new wxDFBWindowImplDC( window );
64 #elif defined(__WXPM__)
65 return new wxPMWindowImplDC( window );
66 #elif defined(__PALMOS__)
67 return new wxPalmWindowImplDC( window );
68 #endif
69 }
70
71 wxImplDC* wxNativeDCFactory::CreateClientDC( wxWindow *window )
72 {
73 #if defined(__WXMSW__)
74 return new wxWindowsClientImplDC( window );
75 #elif defined(__WXGTK20__)
76 return new wxGTKClientImplDC( window );
77 #elif defined(__WXGTK__)
78 return new wxGTKClientImplDC( window );
79 #elif defined(__WXMAC__)
80 return new wxMacClientImplDC( window );
81 #elif defined(__WXCOCOA__)
82 return new wxCocoaClientImplDC( window );
83 #elif defined(__WXMOTIF__)
84 return new wxMotifClientImplDC( window );
85 #elif defined(__WXX11__)
86 return new wxX11ClientImplDC( window );
87 #elif defined(__WXMGL__)
88 return new wxMGLClientImplDC( window );
89 #elif defined(__WXDFB__)
90 return new wxDFBClientImplDC( window );
91 #elif defined(__WXPM__)
92 return new wxPMClientImplDC( window );
93 #elif defined(__PALMOS__)
94 return new wxPalmClientImplDC( window );
95 #endif
96 }
97
98 wxImplDC* wxNativeDCFactory::CreatePaintDC( wxWindow *window )
99 {
100 #if defined(__WXMSW__)
101 return new wxWindowsPaintImplDC( window );
102 #elif defined(__WXGTK20__)
103 return new wxGTKPaintImplDC( window );
104 #elif defined(__WXGTK__)
105 return new wxGTKPaintImplDC( window );
106 #elif defined(__WXMAC__)
107 return new wxMacPaintImplDC( window );
108 #elif defined(__WXCOCOA__)
109 return new wxCocoaPaintImplDC( window );
110 #elif defined(__WXMOTIF__)
111 return new wxMotifPaintImplDC( window );
112 #elif defined(__WXX11__)
113 return new wxX11PaintImplDC( window );
114 #elif defined(__WXMGL__)
115 return new wxMGLPaintImplDC( window );
116 #elif defined(__WXDFB__)
117 return new wxDFBPaintImplDC( window );
118 #elif defined(__WXPM__)
119 return new wxPMPaintImplDC( window );
120 #elif defined(__PALMOS__)
121 return new wxPalmPaintImplDC( window );
122 #endif
123 }
124
125 wxImplDC* wxNativeDCFactory::CreateMemoryDC()
126 {
127 #if defined(__WXMSW__)
128 return new wxWindowsMemoryImplDC();
129 #elif defined(__WXGTK20__)
130 return new wxGTKMemoryImplDC();
131 #elif defined(__WXGTK__)
132 return new wxGTKMemoryImplDC();
133 #elif defined(__WXMAC__)
134 return new wxMacMemoryImplDC();
135 #elif defined(__WXCOCOA__)
136 return new wxCocoaMemoryImplDC();
137 #elif defined(__WXMOTIF__)
138 return new wxMotifMemoryImplDC();
139 #elif defined(__WXX11__)
140 return new wxX11MemoryImplDC();
141 #elif defined(__WXMGL__)
142 return new wxMGLMemoryImplDC();
143 #elif defined(__WXDFB__)
144 return new wxDFBMemoryImplDC();
145 #elif defined(__WXPM__)
146 return new wxPMMemoryImplDC();
147 #elif defined(__PALMOS__)
148 return new wxPalmMemoryImplDC();
149 #endif
150 }
151
152 wxImplDC* wxNativeDCFactory::CreateMemoryDC( wxBitmap &bitmap )
153 {
154 #if defined(__WXMSW__)
155 return new wxWindowsMemoryImplDC( bitmap );
156 #elif defined(__WXGTK20__)
157 return new wxGTKMemoryImplDC( bitmap );
158 #elif defined(__WXGTK__)
159 return new wxGTKMemoryImplDC( bitmap );
160 #elif defined(__WXMAC__)
161 return new wxMacMemoryImplDC( bitmap );
162 #elif defined(__WXCOCOA__)
163 return new wxCocoaMemoryImplDC( bitmap );
164 #elif defined(__WXMOTIF__)
165 return new wxMotifMemoryImplDC( bitmap );
166 #elif defined(__WXX11__)
167 return new wxX11MemoryImplDC( bitmap );
168 #elif defined(__WXMGL__)
169 return new wxMGLMemoryImplDC( bitmap );
170 #elif defined(__WXDFB__)
171 return new wxDFBMemoryImplDC( bitmap );
172 #elif defined(__WXPM__)
173 return new wxPMMemoryImplDC( bitmap );
174 #elif defined(__PALMOS__)
175 return new wxPalmMemoryImplDC( bitmap );
176 #endif
177 }
178
179 wxImplDC* wxNativeDCFactory::CreateMemoryDC( wxDC *dc )
180 {
181 #if defined(__WXMSW__)
182 return new wxWindowsMemoryImplDC( dc );
183 #elif defined(__WXGTK20__)
184 return new wxGTKMemoryImplDC( dc );
185 #elif defined(__WXGTK__)
186 return new wxGTKMemoryImplDC( dc );
187 #elif defined(__WXMAC__)
188 return new wxMacMemoryImplDC( dc );
189 #elif defined(__WXCOCOA__)
190 return new wxCocoaMemoryImplDC( dc );
191 #elif defined(__WXMOTIF__)
192 return new wxMotifMemoryImplDC( dc );
193 #elif defined(__WXX11__)
194 return new wxX11MemoryImplDC( dc );
195 #elif defined(__WXMGL__)
196 return new wxMGLMemoryImplDC( dc );
197 #elif defined(__WXDFB__)
198 return new wxDFBMemoryImplDC( dc );
199 #elif defined(__WXPM__)
200 return new wxPMMemoryImplDC( dc );
201 #elif defined(__PALMOS__)
202 return new wxPalmMemoryImplDC( dc );
203 #endif
204 }
205
206 //-----------------------------------------------------------------------------
207 // wxImplDC
208 //-----------------------------------------------------------------------------
209
210 IMPLEMENT_ABSTRACT_CLASS(wxImplDC, wxObject)
211
212 wxImplDC::wxImplDC( wxDC *owner )
213 : m_colour(wxColourDisplay())
214 , m_ok(true)
215 , m_clipping(false)
216 , m_isInteractive(0)
217 , m_isBBoxValid(false)
218 , m_logicalOriginX(0), m_logicalOriginY(0)
219 , m_deviceOriginX(0), m_deviceOriginY(0)
220 , m_deviceLocalOriginX(0), m_deviceLocalOriginY(0)
221 , m_logicalScaleX(1.0), m_logicalScaleY(1.0)
222 , m_userScaleX(1.0), m_userScaleY(1.0)
223 , m_scaleX(1.0), m_scaleY(1.0)
224 , m_signX(1), m_signY(1)
225 , m_minX(0), m_minY(0), m_maxX(0), m_maxY(0)
226 , m_clipX1(0), m_clipY1(0), m_clipX2(0), m_clipY2(0)
227 , m_logicalFunction(wxCOPY)
228 , m_backgroundMode(wxTRANSPARENT)
229 , m_mappingMode(wxMM_TEXT)
230 , m_pen()
231 , m_brush()
232 , m_backgroundBrush(*wxTRANSPARENT_BRUSH)
233 , m_textForegroundColour(*wxBLACK)
234 , m_textBackgroundColour(*wxWHITE)
235 , m_font()
236 #if wxUSE_PALETTE
237 , m_palette()
238 , m_hasCustomPalette(false)
239 #endif // wxUSE_PALETTE
240 {
241 m_owner = owner;
242
243 m_mm_to_pix_x = (double)wxGetDisplaySize().GetWidth() /
244 (double)wxGetDisplaySizeMM().GetWidth();
245 m_mm_to_pix_y = (double)wxGetDisplaySize().GetHeight() /
246 (double)wxGetDisplaySizeMM().GetHeight();
247
248 ResetBoundingBox();
249 ResetClipping();
250 }
251
252 wxImplDC::~wxImplDC()
253 {
254 }
255
256 #if WXWIN_COMPATIBILITY_2_8
257 // for compatibility with the old code when wxCoord was long everywhere
258 void wxImplDC::GetTextExtent(const wxString& string,
259 long *x, long *y,
260 long *descent,
261 long *externalLeading,
262 const wxFont *theFont) const
263 {
264 wxCoord x2, y2, descent2, externalLeading2;
265 DoGetTextExtent(string, &x2, &y2,
266 &descent2, &externalLeading2,
267 theFont);
268 if ( x )
269 *x = x2;
270 if ( y )
271 *y = y2;
272 if ( descent )
273 *descent = descent2;
274 if ( externalLeading )
275 *externalLeading = externalLeading2;
276 }
277
278 void wxImplDC::GetLogicalOrigin(long *x, long *y) const
279 {
280 wxCoord x2, y2;
281 DoGetLogicalOrigin(&x2, &y2);
282 if ( x )
283 *x = x2;
284 if ( y )
285 *y = y2;
286 }
287
288 void wxImplDC::GetDeviceOrigin(long *x, long *y) const
289 {
290 wxCoord x2, y2;
291 DoGetDeviceOrigin(&x2, &y2);
292 if ( x )
293 *x = x2;
294 if ( y )
295 *y = y2;
296 }
297
298 void wxImplDC::GetClippingBox(long *x, long *y, long *w, long *h) const
299 {
300 wxCoord xx,yy,ww,hh;
301 DoGetClippingBox(&xx, &yy, &ww, &hh);
302 if (x) *x = xx;
303 if (y) *y = yy;
304 if (w) *w = ww;
305 if (h) *h = hh;
306 }
307 #endif // WXWIN_COMPATIBILITY_2_8
308
309
310
311 // ----------------------------------------------------------------------------
312 // coordinate conversions and transforms
313 // ----------------------------------------------------------------------------
314
315 wxCoord wxImplDC::DeviceToLogicalX(wxCoord x) const
316 {
317 return wxRound((double)(x - m_deviceOriginX - m_deviceLocalOriginX) / m_scaleX) * m_signX + m_logicalOriginX;
318 }
319
320 wxCoord wxImplDC::DeviceToLogicalY(wxCoord y) const
321 {
322 return wxRound((double)(y - m_deviceOriginY - m_deviceLocalOriginY) / m_scaleY) * m_signY + m_logicalOriginY;
323 }
324
325 wxCoord wxImplDC::DeviceToLogicalXRel(wxCoord x) const
326 {
327 return wxRound((double)(x) / m_scaleX);
328 }
329
330 wxCoord wxImplDC::DeviceToLogicalYRel(wxCoord y) const
331 {
332 return wxRound((double)(y) / m_scaleY);
333 }
334
335 wxCoord wxImplDC::LogicalToDeviceX(wxCoord x) const
336 {
337 return wxRound((double)(x - m_logicalOriginX) * m_scaleX) * m_signX + m_deviceOriginX + m_deviceLocalOriginX;
338 }
339
340 wxCoord wxImplDC::LogicalToDeviceY(wxCoord y) const
341 {
342 return wxRound((double)(y - m_logicalOriginY) * m_scaleY) * m_signY + m_deviceOriginY + m_deviceLocalOriginY;
343 }
344
345 wxCoord wxImplDC::LogicalToDeviceXRel(wxCoord x) const
346 {
347 return wxRound((double)(x) * m_scaleX);
348 }
349
350 wxCoord wxImplDC::LogicalToDeviceYRel(wxCoord y) const
351 {
352 return wxRound((double)(y) * m_scaleY);
353 }
354
355 void wxImplDC::ComputeScaleAndOrigin()
356 {
357 m_scaleX = m_logicalScaleX * m_userScaleX;
358 m_scaleY = m_logicalScaleY * m_userScaleY;
359 }
360
361 void wxImplDC::SetMapMode( int mode )
362 {
363 switch (mode)
364 {
365 case wxMM_TWIPS:
366 SetLogicalScale( twips2mm*m_mm_to_pix_x, twips2mm*m_mm_to_pix_y );
367 break;
368 case wxMM_POINTS:
369 SetLogicalScale( pt2mm*m_mm_to_pix_x, pt2mm*m_mm_to_pix_y );
370 break;
371 case wxMM_METRIC:
372 SetLogicalScale( m_mm_to_pix_x, m_mm_to_pix_y );
373 break;
374 case wxMM_LOMETRIC:
375 SetLogicalScale( m_mm_to_pix_x/10.0, m_mm_to_pix_y/10.0 );
376 break;
377 default:
378 case wxMM_TEXT:
379 SetLogicalScale( 1.0, 1.0 );
380 break;
381 }
382 m_mappingMode = mode;
383 }
384
385 void wxImplDC::SetUserScale( double x, double y )
386 {
387 // allow negative ? -> no
388 m_userScaleX = x;
389 m_userScaleY = y;
390 ComputeScaleAndOrigin();
391 }
392
393 void wxImplDC::SetLogicalScale( double x, double y )
394 {
395 // allow negative ?
396 m_logicalScaleX = x;
397 m_logicalScaleY = y;
398 ComputeScaleAndOrigin();
399 }
400
401 void wxImplDC::SetLogicalOrigin( wxCoord x, wxCoord y )
402 {
403 m_logicalOriginX = x * m_signX;
404 m_logicalOriginY = y * m_signY;
405 ComputeScaleAndOrigin();
406 }
407
408 void wxImplDC::SetDeviceOrigin( wxCoord x, wxCoord y )
409 {
410 m_deviceOriginX = x;
411 m_deviceOriginY = y;
412 ComputeScaleAndOrigin();
413 }
414
415 void wxImplDC::SetDeviceLocalOrigin( wxCoord x, wxCoord y )
416 {
417 m_deviceLocalOriginX = x;
418 m_deviceLocalOriginY = y;
419 ComputeScaleAndOrigin();
420 }
421
422 void wxImplDC::SetAxisOrientation( bool xLeftRight, bool yBottomUp )
423 {
424 // only wxPostScripDC has m_signX = -1, we override SetAxisOrientation there
425 m_signX = (xLeftRight ? 1 : -1);
426 m_signY = (yBottomUp ? -1 : 1);
427 ComputeScaleAndOrigin();
428 }
429
430
431 // Each element of the widths array will be the width of the string up to and
432 // including the corresponding character in text. This is the generic
433 // implementation, the port-specific classes should do this with native APIs
434 // if available and if faster. Note: pango_layout_index_to_pos is much slower
435 // than calling GetTextExtent!!
436
437 #define FWC_SIZE 256
438
439 class FontWidthCache
440 {
441 public:
442 FontWidthCache() : m_scaleX(1), m_widths(NULL) { }
443 ~FontWidthCache() { delete []m_widths; }
444
445 void Reset()
446 {
447 if (!m_widths)
448 m_widths = new int[FWC_SIZE];
449
450 memset(m_widths, 0, sizeof(int)*FWC_SIZE);
451 }
452
453 wxFont m_font;
454 double m_scaleX;
455 int *m_widths;
456 };
457
458 static FontWidthCache s_fontWidthCache;
459
460 bool wxImplDC::DoGetPartialTextExtents(const wxString& text, wxArrayInt& widths) const
461 {
462 int totalWidth = 0;
463
464 const size_t len = text.length();
465 widths.Empty();
466 widths.Add(0, len);
467
468 // reset the cache if font or horizontal scale have changed
469 if ( !s_fontWidthCache.m_widths ||
470 !wxIsSameDouble(s_fontWidthCache.m_scaleX, m_scaleX) ||
471 (s_fontWidthCache.m_font != GetFont()) )
472 {
473 s_fontWidthCache.Reset();
474 s_fontWidthCache.m_font = GetFont();
475 s_fontWidthCache.m_scaleX = m_scaleX;
476 }
477
478 // Calculate the position of each character based on the widths of
479 // the previous characters
480 int w, h;
481 for ( size_t i = 0; i < len; i++ )
482 {
483 const wxChar c = text[i];
484 unsigned int c_int = (unsigned int)c;
485
486 if ((c_int < FWC_SIZE) && (s_fontWidthCache.m_widths[c_int] != 0))
487 {
488 w = s_fontWidthCache.m_widths[c_int];
489 }
490 else
491 {
492 GetTextExtent(c, &w, &h);
493 if (c_int < FWC_SIZE)
494 s_fontWidthCache.m_widths[c_int] = w;
495 }
496
497 totalWidth += w;
498 widths[i] = totalWidth;
499 }
500
501 return true;
502 }
503
504 void wxImplDC::GetMultiLineTextExtent(const wxString& text,
505 wxCoord *x,
506 wxCoord *y,
507 wxCoord *h,
508 const wxFont *font) const
509 {
510 wxCoord widthTextMax = 0, widthLine,
511 heightTextTotal = 0, heightLineDefault = 0, heightLine = 0;
512
513 wxString curLine;
514 for ( const wxChar *pc = text; ; pc++ )
515 {
516 if ( *pc == _T('\n') || *pc == _T('\0') )
517 {
518 if ( curLine.empty() )
519 {
520 // we can't use GetTextExtent - it will return 0 for both width
521 // and height and an empty line should count in height
522 // calculation
523
524 // assume that this line has the same height as the previous
525 // one
526 if ( !heightLineDefault )
527 heightLineDefault = heightLine;
528
529 if ( !heightLineDefault )
530 {
531 // but we don't know it yet - choose something reasonable
532 DoGetTextExtent(_T("W"), NULL, &heightLineDefault,
533 NULL, NULL, font);
534 }
535
536 heightTextTotal += heightLineDefault;
537 }
538 else
539 {
540 DoGetTextExtent(curLine, &widthLine, &heightLine,
541 NULL, NULL, font);
542 if ( widthLine > widthTextMax )
543 widthTextMax = widthLine;
544 heightTextTotal += heightLine;
545 }
546
547 if ( *pc == _T('\n') )
548 {
549 curLine.clear();
550 }
551 else
552 {
553 // the end of string
554 break;
555 }
556 }
557 else
558 {
559 curLine += *pc;
560 }
561 }
562
563 if ( x )
564 *x = widthTextMax;
565 if ( y )
566 *y = heightTextTotal;
567 if ( h )
568 *h = heightLine;
569 }
570
571 void wxImplDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
572 wxCoord width, wxCoord height)
573 {
574 wxCHECK_RET( Ok(), wxT("invalid window dc") );
575
576 wxCoord x2 = x1 + width,
577 y2 = y1 + height;
578
579 // the pen width is calibrated to give 3 for width == height == 10
580 wxDCPenChanger pen(m_owner, wxPen(GetTextForeground(), (width + height + 1)/7));
581
582 // we're drawing a scaled version of wx/generic/tick.xpm here
583 wxCoord x3 = x1 + (4*width) / 10, // x of the tick bottom
584 y3 = y1 + height / 2; // y of the left tick branch
585 DoDrawLine(x1, y3, x3, y2);
586 DoDrawLine(x3, y2, x2, y1);
587
588 CalcBoundingBox(x1, y1);
589 CalcBoundingBox(x2, y2);
590 }
591
592 bool
593 wxImplDC::DoStretchBlit(wxCoord xdest, wxCoord ydest,
594 wxCoord dstWidth, wxCoord dstHeight,
595 wxDC *source,
596 wxCoord xsrc, wxCoord ysrc,
597 wxCoord srcWidth, wxCoord srcHeight,
598 int rop,
599 bool useMask,
600 wxCoord xsrcMask,
601 wxCoord ysrcMask)
602 {
603 wxCHECK_MSG( srcWidth && srcHeight && dstWidth && dstHeight, false,
604 _T("invalid blit size") );
605
606 // emulate the stretching by modifying the DC scale
607 double xscale = (double)srcWidth/dstWidth,
608 yscale = (double)srcHeight/dstHeight;
609
610 double xscaleOld, yscaleOld;
611 GetUserScale(&xscaleOld, &yscaleOld);
612 SetUserScale(xscaleOld/xscale, yscaleOld/yscale);
613
614 bool rc = DoBlit(wxCoord(xdest*xscale), wxCoord(ydest*yscale),
615 wxCoord(dstWidth*xscale), wxCoord(dstHeight*yscale),
616 source,
617 xsrc, ysrc, rop, useMask, xsrcMask, ysrcMask);
618
619 SetUserScale(xscaleOld, yscaleOld);
620
621 return rc;
622 }
623
624 void wxImplDC::DrawLines(const wxList *list, wxCoord xoffset, wxCoord yoffset)
625 {
626 int n = list->GetCount();
627 wxPoint *points = new wxPoint[n];
628
629 int i = 0;
630 for ( wxList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
631 {
632 wxPoint *point = (wxPoint *)node->GetData();
633 points[i].x = point->x;
634 points[i].y = point->y;
635 }
636
637 DoDrawLines(n, points, xoffset, yoffset);
638
639 delete [] points;
640 }
641
642 void wxImplDC::DrawPolygon(const wxList *list,
643 wxCoord xoffset, wxCoord yoffset,
644 int fillStyle)
645 {
646 int n = list->GetCount();
647 wxPoint *points = new wxPoint[n];
648
649 int i = 0;
650 for ( wxList::compatibility_iterator node = list->GetFirst(); node; node = node->GetNext(), i++ )
651 {
652 wxPoint *point = (wxPoint *)node->GetData();
653 points[i].x = point->x;
654 points[i].y = point->y;
655 }
656
657 DoDrawPolygon(n, points, xoffset, yoffset, fillStyle);
658
659 delete [] points;
660 }
661
662 void
663 wxImplDC::DoDrawPolyPolygon(int n,
664 int count[],
665 wxPoint points[],
666 wxCoord xoffset, wxCoord yoffset,
667 int fillStyle)
668 {
669 if ( n == 1 )
670 {
671 DoDrawPolygon(count[0], points, xoffset, yoffset, fillStyle);
672 return;
673 }
674
675 int i, j, lastOfs;
676 wxPoint* pts;
677 wxPen pen;
678
679 for (i = j = lastOfs = 0; i < n; i++)
680 {
681 lastOfs = j;
682 j += count[i];
683 }
684 pts = new wxPoint[j+n-1];
685 for (i = 0; i < j; i++)
686 pts[i] = points[i];
687 for (i = 2; i <= n; i++)
688 {
689 lastOfs -= count[n-i];
690 pts[j++] = pts[lastOfs];
691 }
692
693 pen = GetPen();
694 SetPen(wxPen(*wxBLACK, 0, wxTRANSPARENT));
695 DoDrawPolygon(j, pts, xoffset, yoffset, fillStyle);
696 SetPen(pen);
697 for (i = j = 0; i < n; i++)
698 {
699 DoDrawLines(count[i], pts+j, xoffset, yoffset);
700 j += count[i];
701 }
702 delete[] pts;
703 }
704
705 #if wxUSE_SPLINES
706
707 // TODO: this API needs fixing (wxPointList, why (!const) "wxList *"?)
708 void wxImplDC::DrawSpline(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2, wxCoord x3, wxCoord y3)
709 {
710 wxList point_list;
711
712 wxPoint *point1 = new wxPoint;
713 point1->x = x1; point1->y = y1;
714 point_list.Append((wxObject*)point1);
715
716 wxPoint *point2 = new wxPoint;
717 point2->x = x2; point2->y = y2;
718 point_list.Append((wxObject*)point2);
719
720 wxPoint *point3 = new wxPoint;
721 point3->x = x3; point3->y = y3;
722 point_list.Append((wxObject*)point3);
723
724 DrawSpline(&point_list);
725
726 for( wxList::compatibility_iterator node = point_list.GetFirst(); node; node = node->GetNext() )
727 {
728 wxPoint *p = (wxPoint *)node->GetData();
729 delete p;
730 }
731 }
732
733 void wxImplDC::DrawSpline(int n, wxPoint points[])
734 {
735 wxList list;
736 for (int i =0; i < n; i++)
737 {
738 list.Append((wxObject*)&points[i]);
739 }
740
741 DrawSpline(&list);
742 }
743
744 // ----------------------------------- spline code ----------------------------------------
745
746 void wx_quadratic_spline(double a1, double b1, double a2, double b2,
747 double a3, double b3, double a4, double b4);
748 void wx_clear_stack();
749 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2, double *x3,
750 double *y3, double *x4, double *y4);
751 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3,
752 double x4, double y4);
753 static bool wx_spline_add_point(double x, double y);
754 static void wx_spline_draw_point_array(wxDCBase *dc);
755
756 wxList wx_spline_point_list;
757
758 #define half(z1, z2) ((z1+z2)/2.0)
759 #define THRESHOLD 5
760
761 /* iterative version */
762
763 void wx_quadratic_spline(double a1, double b1, double a2, double b2, double a3, double b3, double a4,
764 double b4)
765 {
766 register double xmid, ymid;
767 double x1, y1, x2, y2, x3, y3, x4, y4;
768
769 wx_clear_stack();
770 wx_spline_push(a1, b1, a2, b2, a3, b3, a4, b4);
771
772 while (wx_spline_pop(&x1, &y1, &x2, &y2, &x3, &y3, &x4, &y4)) {
773 xmid = (double)half(x2, x3);
774 ymid = (double)half(y2, y3);
775 if (fabs(x1 - xmid) < THRESHOLD && fabs(y1 - ymid) < THRESHOLD &&
776 fabs(xmid - x4) < THRESHOLD && fabs(ymid - y4) < THRESHOLD) {
777 wx_spline_add_point( x1, y1 );
778 wx_spline_add_point( xmid, ymid );
779 } else {
780 wx_spline_push(xmid, ymid, (double)half(xmid, x3), (double)half(ymid, y3),
781 (double)half(x3, x4), (double)half(y3, y4), x4, y4);
782 wx_spline_push(x1, y1, (double)half(x1, x2), (double)half(y1, y2),
783 (double)half(x2, xmid), (double)half(y2, ymid), xmid, ymid);
784 }
785 }
786 }
787
788 /* utilities used by spline drawing routines */
789
790 typedef struct wx_spline_stack_struct {
791 double x1, y1, x2, y2, x3, y3, x4, y4;
792 } Stack;
793
794 #define SPLINE_STACK_DEPTH 20
795 static Stack wx_spline_stack[SPLINE_STACK_DEPTH];
796 static Stack *wx_stack_top;
797 static int wx_stack_count;
798
799 void wx_clear_stack()
800 {
801 wx_stack_top = wx_spline_stack;
802 wx_stack_count = 0;
803 }
804
805 void wx_spline_push(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
806 {
807 wx_stack_top->x1 = x1;
808 wx_stack_top->y1 = y1;
809 wx_stack_top->x2 = x2;
810 wx_stack_top->y2 = y2;
811 wx_stack_top->x3 = x3;
812 wx_stack_top->y3 = y3;
813 wx_stack_top->x4 = x4;
814 wx_stack_top->y4 = y4;
815 wx_stack_top++;
816 wx_stack_count++;
817 }
818
819 int wx_spline_pop(double *x1, double *y1, double *x2, double *y2,
820 double *x3, double *y3, double *x4, double *y4)
821 {
822 if (wx_stack_count == 0)
823 return (0);
824 wx_stack_top--;
825 wx_stack_count--;
826 *x1 = wx_stack_top->x1;
827 *y1 = wx_stack_top->y1;
828 *x2 = wx_stack_top->x2;
829 *y2 = wx_stack_top->y2;
830 *x3 = wx_stack_top->x3;
831 *y3 = wx_stack_top->y3;
832 *x4 = wx_stack_top->x4;
833 *y4 = wx_stack_top->y4;
834 return (1);
835 }
836
837 static bool wx_spline_add_point(double x, double y)
838 {
839 wxPoint *point = new wxPoint ;
840 point->x = (int) x;
841 point->y = (int) y;
842 wx_spline_point_list.Append((wxObject*)point);
843 return true;
844 }
845
846 static void wx_spline_draw_point_array(wxDC *dc)
847 {
848 dc->DrawLines(&wx_spline_point_list, 0, 0 );
849 wxList::compatibility_iterator node = wx_spline_point_list.GetFirst();
850 while (node)
851 {
852 wxPoint *point = (wxPoint *)node->GetData();
853 delete point;
854 wx_spline_point_list.Erase(node);
855 node = wx_spline_point_list.GetFirst();
856 }
857 }
858
859 void wxImplDC::DoDrawSpline( wxList *points )
860 {
861 wxCHECK_RET( Ok(), wxT("invalid window dc") );
862
863 wxPoint *p;
864 double cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4;
865 double x1, y1, x2, y2;
866
867 wxList::compatibility_iterator node = points->GetFirst();
868 if (!node)
869 // empty list
870 return;
871
872 p = (wxPoint *)node->GetData();
873
874 x1 = p->x;
875 y1 = p->y;
876
877 node = node->GetNext();
878 p = (wxPoint *)node->GetData();
879
880 x2 = p->x;
881 y2 = p->y;
882 cx1 = (double)((x1 + x2) / 2);
883 cy1 = (double)((y1 + y2) / 2);
884 cx2 = (double)((cx1 + x2) / 2);
885 cy2 = (double)((cy1 + y2) / 2);
886
887 wx_spline_add_point(x1, y1);
888
889 while ((node = node->GetNext())
890 #if !wxUSE_STL
891 != NULL
892 #endif // !wxUSE_STL
893 )
894 {
895 p = (wxPoint *)node->GetData();
896 x1 = x2;
897 y1 = y2;
898 x2 = p->x;
899 y2 = p->y;
900 cx4 = (double)(x1 + x2) / 2;
901 cy4 = (double)(y1 + y2) / 2;
902 cx3 = (double)(x1 + cx4) / 2;
903 cy3 = (double)(y1 + cy4) / 2;
904
905 wx_quadratic_spline(cx1, cy1, cx2, cy2, cx3, cy3, cx4, cy4);
906
907 cx1 = cx4;
908 cy1 = cy4;
909 cx2 = (double)(cx1 + x2) / 2;
910 cy2 = (double)(cy1 + y2) / 2;
911 }
912
913 wx_spline_add_point( cx1, cy1 );
914 wx_spline_add_point( x2, y2 );
915
916 wx_spline_draw_point_array( m_owner );
917 }
918
919 #endif // wxUSE_SPLINES
920
921
922 void wxImplDC::DrawLabel(const wxString& text,
923 const wxBitmap& bitmap,
924 const wxRect& rect,
925 int alignment,
926 int indexAccel,
927 wxRect *rectBounding)
928 {
929 // find the text position
930 wxCoord widthText, heightText, heightLine;
931 GetMultiLineTextExtent(text, &widthText, &heightText, &heightLine);
932
933 wxCoord width, height;
934 if ( bitmap.Ok() )
935 {
936 width = widthText + bitmap.GetWidth();
937 height = bitmap.GetHeight();
938 }
939 else // no bitmap
940 {
941 width = widthText;
942 height = heightText;
943 }
944
945 wxCoord x, y;
946 if ( alignment & wxALIGN_RIGHT )
947 {
948 x = rect.GetRight() - width;
949 }
950 else if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
951 {
952 x = (rect.GetLeft() + rect.GetRight() + 1 - width) / 2;
953 }
954 else // alignment & wxALIGN_LEFT
955 {
956 x = rect.GetLeft();
957 }
958
959 if ( alignment & wxALIGN_BOTTOM )
960 {
961 y = rect.GetBottom() - height;
962 }
963 else if ( alignment & wxALIGN_CENTRE_VERTICAL )
964 {
965 y = (rect.GetTop() + rect.GetBottom() + 1 - height) / 2;
966 }
967 else // alignment & wxALIGN_TOP
968 {
969 y = rect.GetTop();
970 }
971
972 // draw the bitmap first
973 wxCoord x0 = x,
974 y0 = y,
975 width0 = width;
976 if ( bitmap.Ok() )
977 {
978 DoDrawBitmap(bitmap, x, y, true /* use mask */);
979
980 wxCoord offset = bitmap.GetWidth() + 4;
981 x += offset;
982 width -= offset;
983
984 y += (height - heightText) / 2;
985 }
986
987 // we will draw the underscore under the accel char later
988 wxCoord startUnderscore = 0,
989 endUnderscore = 0,
990 yUnderscore = 0;
991
992 // split the string into lines and draw each of them separately
993 wxString curLine;
994 for ( wxString::const_iterator pc = text.begin(); ; ++pc )
995 {
996 if ( *pc == _T('\n') || pc == text.end() )
997 {
998 int xRealStart = x; // init it here to avoid compielr warnings
999
1000 if ( !curLine.empty() )
1001 {
1002 // NB: can't test for !(alignment & wxALIGN_LEFT) because
1003 // wxALIGN_LEFT is 0
1004 if ( alignment & (wxALIGN_RIGHT | wxALIGN_CENTRE_HORIZONTAL) )
1005 {
1006 wxCoord widthLine;
1007 m_owner->GetTextExtent(curLine, &widthLine, NULL);
1008
1009 if ( alignment & wxALIGN_RIGHT )
1010 {
1011 xRealStart += width - widthLine;
1012 }
1013 else // if ( alignment & wxALIGN_CENTRE_HORIZONTAL )
1014 {
1015 xRealStart += (width - widthLine) / 2;
1016 }
1017 }
1018 //else: left aligned, nothing to do
1019
1020 DoDrawText(curLine, xRealStart, y);
1021 }
1022
1023 y += heightLine;
1024
1025 // do we have underscore in this line? we can check yUnderscore
1026 // because it is set below to just y + heightLine if we do
1027 if ( y == yUnderscore )
1028 {
1029 // adjust the horz positions to account for the shift
1030 startUnderscore += xRealStart;
1031 endUnderscore += xRealStart;
1032 }
1033
1034 if ( pc == text.end() )
1035 break;
1036
1037 curLine.clear();
1038 }
1039 else // not end of line
1040 {
1041 if ( pc - text.begin() == indexAccel )
1042 {
1043 // remeber to draw underscore here
1044 GetTextExtent(curLine, &startUnderscore, NULL);
1045 curLine += *pc;
1046 GetTextExtent(curLine, &endUnderscore, NULL);
1047
1048 yUnderscore = y + heightLine;
1049 }
1050 else
1051 {
1052 curLine += *pc;
1053 }
1054 }
1055 }
1056
1057 // draw the underscore if found
1058 if ( startUnderscore != endUnderscore )
1059 {
1060 // it should be of the same colour as text
1061 SetPen(wxPen(GetTextForeground(), 0, wxSOLID));
1062
1063 yUnderscore--;
1064
1065 DoDrawLine(startUnderscore, yUnderscore, endUnderscore, yUnderscore);
1066 }
1067
1068 // return bounding rect if requested
1069 if ( rectBounding )
1070 {
1071 *rectBounding = wxRect(x, y - heightText, widthText, heightText);
1072 }
1073
1074 CalcBoundingBox(x0, y0);
1075 CalcBoundingBox(x0 + width0, y0 + height);
1076 }
1077
1078
1079 void wxImplDC::DoGradientFillLinear(const wxRect& rect,
1080 const wxColour& initialColour,
1081 const wxColour& destColour,
1082 wxDirection nDirection)
1083 {
1084 // save old pen
1085 wxPen oldPen = m_pen;
1086 wxBrush oldBrush = m_brush;
1087
1088 wxUint8 nR1 = initialColour.Red();
1089 wxUint8 nG1 = initialColour.Green();
1090 wxUint8 nB1 = initialColour.Blue();
1091 wxUint8 nR2 = destColour.Red();
1092 wxUint8 nG2 = destColour.Green();
1093 wxUint8 nB2 = destColour.Blue();
1094 wxUint8 nR, nG, nB;
1095
1096 if ( nDirection == wxEAST || nDirection == wxWEST )
1097 {
1098 wxInt32 x = rect.GetWidth();
1099 wxInt32 w = x; // width of area to shade
1100 wxInt32 xDelta = w/256; // height of one shade bend
1101 if (xDelta < 1)
1102 xDelta = 1;
1103
1104 while (x >= xDelta)
1105 {
1106 x -= xDelta;
1107 if (nR1 > nR2)
1108 nR = nR1 - (nR1-nR2)*(w-x)/w;
1109 else
1110 nR = nR1 + (nR2-nR1)*(w-x)/w;
1111
1112 if (nG1 > nG2)
1113 nG = nG1 - (nG1-nG2)*(w-x)/w;
1114 else
1115 nG = nG1 + (nG2-nG1)*(w-x)/w;
1116
1117 if (nB1 > nB2)
1118 nB = nB1 - (nB1-nB2)*(w-x)/w;
1119 else
1120 nB = nB1 + (nB2-nB1)*(w-x)/w;
1121
1122 wxColour colour(nR,nG,nB);
1123 SetPen(wxPen(colour, 1, wxSOLID));
1124 SetBrush(wxBrush(colour));
1125 if(nDirection == wxEAST)
1126 DoDrawRectangle(rect.GetRight()-x-xDelta, rect.GetTop(),
1127 xDelta, rect.GetHeight());
1128 else //nDirection == wxWEST
1129 DoDrawRectangle(rect.GetLeft()+x, rect.GetTop(),
1130 xDelta, rect.GetHeight());
1131 }
1132 }
1133 else // nDirection == wxNORTH || nDirection == wxSOUTH
1134 {
1135 wxInt32 y = rect.GetHeight();
1136 wxInt32 w = y; // height of area to shade
1137 wxInt32 yDelta = w/255; // height of one shade bend
1138 if (yDelta < 1)
1139 yDelta = 1;
1140
1141 while (y > 0)
1142 {
1143 y -= yDelta;
1144 if (nR1 > nR2)
1145 nR = nR1 - (nR1-nR2)*(w-y)/w;
1146 else
1147 nR = nR1 + (nR2-nR1)*(w-y)/w;
1148
1149 if (nG1 > nG2)
1150 nG = nG1 - (nG1-nG2)*(w-y)/w;
1151 else
1152 nG = nG1 + (nG2-nG1)*(w-y)/w;
1153
1154 if (nB1 > nB2)
1155 nB = nB1 - (nB1-nB2)*(w-y)/w;
1156 else
1157 nB = nB1 + (nB2-nB1)*(w-y)/w;
1158
1159 wxColour colour(nR,nG,nB);
1160 SetPen(wxPen(colour, 1, wxSOLID));
1161 SetBrush(wxBrush(colour));
1162 if(nDirection == wxNORTH)
1163 DoDrawRectangle(rect.GetLeft(), rect.GetTop()+y,
1164 rect.GetWidth(), yDelta);
1165 else //nDirection == wxSOUTH
1166 DoDrawRectangle(rect.GetLeft(), rect.GetBottom()-y-yDelta,
1167 rect.GetWidth(), yDelta);
1168 }
1169 }
1170
1171 SetPen(oldPen);
1172 SetBrush(oldBrush);
1173 }
1174
1175 void wxImplDC::DoGradientFillConcentric(const wxRect& rect,
1176 const wxColour& initialColour,
1177 const wxColour& destColour,
1178 const wxPoint& circleCenter)
1179 {
1180 //save the old pen color
1181 wxColour oldPenColour = m_pen.GetColour();
1182
1183 wxUint8 nR1 = destColour.Red();
1184 wxUint8 nG1 = destColour.Green();
1185 wxUint8 nB1 = destColour.Blue();
1186 wxUint8 nR2 = initialColour.Red();
1187 wxUint8 nG2 = initialColour.Green();
1188 wxUint8 nB2 = initialColour.Blue();
1189 wxUint8 nR, nG, nB;
1190
1191
1192 //Radius
1193 wxInt32 cx = rect.GetWidth() / 2;
1194 wxInt32 cy = rect.GetHeight() / 2;
1195 wxInt32 nRadius;
1196 if (cx < cy)
1197 nRadius = cx;
1198 else
1199 nRadius = cy;
1200
1201 //Offset of circle
1202 wxInt32 nCircleOffX = circleCenter.x - (rect.GetWidth() / 2);
1203 wxInt32 nCircleOffY = circleCenter.y - (rect.GetHeight() / 2);
1204
1205 for ( wxInt32 x = 0; x < rect.GetWidth(); x++ )
1206 {
1207 for ( wxInt32 y = 0; y < rect.GetHeight(); y++ )
1208 {
1209 //get color difference
1210 wxInt32 nGradient = ((nRadius -
1211 (wxInt32)sqrt(
1212 pow((double)(x - cx - nCircleOffX), 2) +
1213 pow((double)(y - cy - nCircleOffY), 2)
1214 )) * 100) / nRadius;
1215
1216 //normalize Gradient
1217 if (nGradient < 0 )
1218 nGradient = 0;
1219
1220 //get dest colors
1221 nR = (wxUint8)(nR1 + ((nR2 - nR1) * nGradient / 100));
1222 nG = (wxUint8)(nG1 + ((nG2 - nG1) * nGradient / 100));
1223 nB = (wxUint8)(nB1 + ((nB2 - nB1) * nGradient / 100));
1224
1225 //set the pixel
1226 m_pen.SetColour(wxColour(nR,nG,nB));
1227 DoDrawPoint(wxPoint(x + rect.GetLeft(), y + rect.GetTop()));
1228 }
1229 }
1230 //return old pen color
1231 m_pen.SetColour(oldPenColour);
1232 }
1233
1234 //-----------------------------------------------------------------------------
1235 // wxDC
1236 //-----------------------------------------------------------------------------
1237
1238 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxObject)
1239
1240 #if WXWIN_COMPATIBILITY_2_8
1241 // for compatibility with the old code when wxCoord was long everywhere
1242 void wxDC::GetTextExtent(const wxString& string,
1243 long *x, long *y,
1244 long *descent,
1245 long *externalLeading,
1246 const wxFont *theFont) const
1247 {
1248 wxCoord x2, y2, descent2, externalLeading2;
1249 m_pimpl->DoGetTextExtent(string, &x2, &y2,
1250 &descent2, &externalLeading2,
1251 theFont);
1252 if ( x )
1253 *x = x2;
1254 if ( y )
1255 *y = y2;
1256 if ( descent )
1257 *descent = descent2;
1258 if ( externalLeading )
1259 *externalLeading = externalLeading2;
1260 }
1261
1262 void wxDC::GetLogicalOrigin(long *x, long *y) const
1263 {
1264 wxCoord x2, y2;
1265 m_pimpl->DoGetLogicalOrigin(&x2, &y2);
1266 if ( x )
1267 *x = x2;
1268 if ( y )
1269 *y = y2;
1270 }
1271
1272 void wxDC::GetDeviceOrigin(long *x, long *y) const
1273 {
1274 wxCoord x2, y2;
1275 m_pimpl->DoGetDeviceOrigin(&x2, &y2);
1276 if ( x )
1277 *x = x2;
1278 if ( y )
1279 *y = y2;
1280 }
1281
1282 void wxDC::GetClippingBox(long *x, long *y, long *w, long *h) const
1283 {
1284 wxCoord xx,yy,ww,hh;
1285 m_pimpl->DoGetClippingBox(&xx, &yy, &ww, &hh);
1286 if (x) *x = xx;
1287 if (y) *y = yy;
1288 if (w) *w = ww;
1289 if (h) *h = hh;
1290 }
1291
1292 #endif // WXWIN_COMPATIBILITY_2_8
1293
1294
1295 #endif // wxUSE_NEW_DC
1296
1297 //-----------------------------------------------------------------------------
1298 // wxDC
1299 //-----------------------------------------------------------------------------
1300
1301 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
1302
1303 wxDC::wxDC()
1304 {
1305 m_ok = FALSE;
1306
1307 m_pen = *wxBLACK_PEN;
1308 m_font = *wxNORMAL_FONT;
1309 m_brush = *wxWHITE_BRUSH;
1310 }
1311
1312 void wxDC::DoSetClippingRegion( wxCoord x, wxCoord y, wxCoord width, wxCoord height )
1313 {
1314 m_clipping = TRUE;
1315 m_clipX1 = x;
1316 m_clipY1 = y;
1317 m_clipX2 = x + width;
1318 m_clipY2 = y + height;
1319 }
1320
1321 // ---------------------------------------------------------------------------
1322 // get DC capabilities
1323 // ---------------------------------------------------------------------------
1324
1325 void wxDC::DoGetSizeMM( int* width, int* height ) const
1326 {
1327 int w = 0;
1328 int h = 0;
1329 GetSize( &w, &h );
1330 if (width) *width = int( double(w) / (m_userScaleX*m_mm_to_pix_x) );
1331 if (height) *height = int( double(h) / (m_userScaleY*m_mm_to_pix_y) );
1332 }
1333
1334 // Resolution in pixels per logical inch
1335 wxSize wxDC::GetPPI() const
1336 {
1337 // TODO (should probably be pure virtual)
1338 return wxSize(0, 0);
1339 }
wxWidgets (Impactor)