]> git.saurik.com Git - wxWidgets.git/blob - src/msw/dc.cpp
projects / wxWidgets.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
minor additions to wxCmdLineParser tests
[wxWidgets.git] / src / msw / dc.cpp
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: dc.cpp
3 // Purpose: wxDC class
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 01/02/97
7 // RCS-ID: $Id$
8 // Copyright: (c) Julian Smart and Markus Holzem
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // ===========================================================================
13 // declarations
14 // ===========================================================================
15
16 // ---------------------------------------------------------------------------
17 // headers
18 // ---------------------------------------------------------------------------
19
20 #ifdef __GNUG__
21 #pragma implementation "dc.h"
22 #endif
23
24 // For compilers that support precompilation, includes "wx.h".
25 #include "wx/wxprec.h"
26
27 #ifdef __BORLANDC__
28 #pragma hdrstop
29 #endif
30
31 #ifndef WX_PRECOMP
32 #include "wx/window.h"
33 #include "wx/dc.h"
34 #include "wx/utils.h"
35 #include "wx/dialog.h"
36 #include "wx/app.h"
37 #include "wx/bitmap.h"
38 #include "wx/dcmemory.h"
39 #include "wx/log.h"
40 #include "wx/icon.h"
41 #endif
42
43 #include "wx/sysopt.h"
44 #include "wx/dcprint.h"
45 #include "wx/module.h"
46
47 #include <string.h>
48 #include <math.h>
49
50 #include "wx/msw/private.h" // needs to be before #include <commdlg.h>
51
52 #if wxUSE_COMMON_DIALOGS
53 #include <commdlg.h>
54 #endif
55
56 #ifndef __WIN32__
57 #include <print.h>
58 #endif
59
60 IMPLEMENT_ABSTRACT_CLASS(wxDC, wxDCBase)
61
62 // ---------------------------------------------------------------------------
63 // constants
64 // ---------------------------------------------------------------------------
65
66 static const int VIEWPORT_EXTENT = 1000;
67
68 static const int MM_POINTS = 9;
69 static const int MM_METRIC = 10;
70
71 // usually this is defined in math.h
72 #ifndef M_PI
73 static const double M_PI = 3.14159265358979323846;
74 #endif // M_PI
75
76 // ROPs which don't have standard names (see "Ternary Raster Operations" in the
77 // MSDN docs for how this and other numbers in wxDC::Blit() are obtained)
78 #define DSTCOPY 0x00AA0029 // a.k.a. NOP operation
79
80 // ---------------------------------------------------------------------------
81 // private functions
82 // ---------------------------------------------------------------------------
83
84 // convert degrees to radians
85 static inline double DegToRad(double deg) { return (deg * M_PI) / 180.0; }
86
87 // ----------------------------------------------------------------------------
88 // private classes
89 // ----------------------------------------------------------------------------
90
91 // instead of duplicating the same code which sets and then restores text
92 // colours in each wxDC method working with wxSTIPPLE_MASK_OPAQUE brushes,
93 // encapsulate this in a small helper class
94
95 // wxColourChanger: changes the text colours in the ctor if required and
96 // restores them in the dtor
97 class wxColourChanger
98 {
99 public:
100 wxColourChanger(wxDC& dc);
101 ~wxColourChanger();
102
103 private:
104 wxDC& m_dc;
105
106 COLORREF m_colFgOld, m_colBgOld;
107
108 bool m_changed;
109 };
110
111 // ===========================================================================
112 // implementation
113 // ===========================================================================
114
115 // ----------------------------------------------------------------------------
116 // wxColourChanger
117 // ----------------------------------------------------------------------------
118
119 wxColourChanger::wxColourChanger(wxDC& dc) : m_dc(dc)
120 {
121 if ( dc.GetBrush().GetStyle() == wxSTIPPLE_MASK_OPAQUE )
122 {
123 HDC hdc = GetHdcOf(dc);
124 m_colFgOld = ::GetTextColor(hdc);
125 m_colBgOld = ::GetBkColor(hdc);
126
127 // note that Windows convention is opposite to wxWindows one, this is
128 // why text colour becomes the background one and vice versa
129 const wxColour& colFg = dc.GetTextForeground();
130 if ( colFg.Ok() )
131 {
132 ::SetBkColor(hdc, colFg.GetPixel());
133 }
134
135 const wxColour& colBg = dc.GetTextBackground();
136 if ( colBg.Ok() )
137 {
138 ::SetTextColor(hdc, colBg.GetPixel());
139 }
140
141 SetBkMode(hdc,
142 dc.GetBackgroundMode() == wxTRANSPARENT ? TRANSPARENT
143 : OPAQUE);
144
145 // flag which telsl us to undo changes in the dtor
146 m_changed = TRUE;
147 }
148 else
149 {
150 // nothing done, nothing to undo
151 m_changed = FALSE;
152 }
153 }
154
155 wxColourChanger::~wxColourChanger()
156 {
157 if ( m_changed )
158 {
159 // restore the colours we changed
160 HDC hdc = GetHdcOf(m_dc);
161
162 ::SetBkMode(hdc, TRANSPARENT);
163 ::SetTextColor(hdc, m_colFgOld);
164 ::SetBkColor(hdc, m_colBgOld);
165 }
166 }
167
168 // ---------------------------------------------------------------------------
169 // wxDC
170 // ---------------------------------------------------------------------------
171
172 // Default constructor
173 wxDC::wxDC()
174 {
175 m_canvas = NULL;
176
177 m_oldBitmap = 0;
178 m_oldPen = 0;
179 m_oldBrush = 0;
180 m_oldFont = 0;
181 #if wxUSE_PALETTE
182 m_oldPalette = 0;
183 #endif // wxUSE_PALETTE
184
185 m_bOwnsDC = FALSE;
186 m_hDC = 0;
187
188 m_windowExtX = VIEWPORT_EXTENT;
189 m_windowExtY = VIEWPORT_EXTENT;
190 }
191
192
193 wxDC::~wxDC()
194 {
195 if ( m_hDC != 0 )
196 {
197 SelectOldObjects(m_hDC);
198
199 // if we own the HDC, we delete it, otherwise we just release it
200
201 if ( m_bOwnsDC )
202 {
203 ::DeleteDC(GetHdc());
204 }
205 else // we don't own our HDC
206 {
207 if (m_canvas)
208 {
209 ::ReleaseDC(GetHwndOf(m_canvas), GetHdc());
210 }
211 else
212 {
213 // Must have been a wxScreenDC
214 ::ReleaseDC((HWND) NULL, GetHdc());
215 }
216 }
217 }
218 }
219
220 // This will select current objects out of the DC,
221 // which is what you have to do before deleting the
222 // DC.
223 void wxDC::SelectOldObjects(WXHDC dc)
224 {
225 if (dc)
226 {
227 if (m_oldBitmap)
228 {
229 ::SelectObject((HDC) dc, (HBITMAP) m_oldBitmap);
230 if (m_selectedBitmap.Ok())
231 {
232 m_selectedBitmap.SetSelectedInto(NULL);
233 }
234 }
235 m_oldBitmap = 0;
236 if (m_oldPen)
237 {
238 ::SelectObject((HDC) dc, (HPEN) m_oldPen);
239 }
240 m_oldPen = 0;
241 if (m_oldBrush)
242 {
243 ::SelectObject((HDC) dc, (HBRUSH) m_oldBrush);
244 }
245 m_oldBrush = 0;
246 if (m_oldFont)
247 {
248 ::SelectObject((HDC) dc, (HFONT) m_oldFont);
249 }
250 m_oldFont = 0;
251
252 #if wxUSE_PALETTE
253 if (m_oldPalette)
254 {
255 ::SelectPalette((HDC) dc, (HPALETTE) m_oldPalette, TRUE);
256 }
257 m_oldPalette = 0;
258 #endif // wxUSE_PALETTE
259 }
260
261 m_brush = wxNullBrush;
262 m_pen = wxNullPen;
263 #if wxUSE_PALETTE
264 m_palette = wxNullPalette;
265 #endif // wxUSE_PALETTE
266 m_font = wxNullFont;
267 m_backgroundBrush = wxNullBrush;
268 m_selectedBitmap = wxNullBitmap;
269 }
270
271 // ---------------------------------------------------------------------------
272 // clipping
273 // ---------------------------------------------------------------------------
274
275 void wxDC::UpdateClipBox()
276 {
277 #ifdef __WXMICROWIN__
278 if (!GetHDC()) return;
279 #endif
280
281 RECT rect;
282 GetClipBox(GetHdc(), &rect);
283
284 m_clipX1 = (wxCoord) XDEV2LOG(rect.left);
285 m_clipY1 = (wxCoord) YDEV2LOG(rect.top);
286 m_clipX2 = (wxCoord) XDEV2LOG(rect.right);
287 m_clipY2 = (wxCoord) YDEV2LOG(rect.bottom);
288 }
289
290 void wxDC::DoSetClippingRegion(wxCoord x, wxCoord y, wxCoord w, wxCoord h)
291 {
292 #ifdef __WXMICROWIN__
293 if (!GetHDC()) return;
294 #endif
295
296 m_clipping = TRUE;
297
298 // the region coords are always the device ones, so do the translation
299 // manually
300 //
301 // FIXME: possible +/-1 error here, to check!
302 HRGN hrgn = ::CreateRectRgn(LogicalToDeviceX(x),
303 LogicalToDeviceY(y),
304 LogicalToDeviceX(x + w),
305 LogicalToDeviceY(y + h));
306 if ( !hrgn )
307 {
308 wxLogLastError(_T("CreateRectRgn"));
309 }
310 else
311 {
312 if ( ::SelectClipRgn(GetHdc(), hrgn) == ERROR )
313 {
314 wxLogLastError(_T("SelectClipRgn"));
315 }
316 DeleteObject(hrgn);
317
318 UpdateClipBox();
319 }
320 }
321
322 void wxDC::DoSetClippingRegionAsRegion(const wxRegion& region)
323 {
324 #ifdef __WXMICROWIN__
325 if (!GetHDC()) return;
326 #endif
327
328 wxCHECK_RET( GetHrgnOf(region), wxT("invalid clipping region") );
329
330 m_clipping = TRUE;
331
332 #ifdef __WIN16__
333 SelectClipRgn(GetHdc(), GetHrgnOf(region));
334 #else // Win32
335 ExtSelectClipRgn(GetHdc(), GetHrgnOf(region), RGN_AND);
336 #endif // Win16/32
337
338 UpdateClipBox();
339 }
340
341 void wxDC::DestroyClippingRegion()
342 {
343 #ifdef __WXMICROWIN__
344 if (!GetHDC()) return;
345 #endif
346
347 if (m_clipping && m_hDC)
348 {
349 // TODO: this should restore the previous clipping region,
350 // so that OnPaint processing works correctly, and the update clipping region
351 // doesn't get destroyed after the first DestroyClippingRegion.
352 HRGN rgn = CreateRectRgn(0, 0, 32000, 32000);
353 SelectClipRgn(GetHdc(), rgn);
354 DeleteObject(rgn);
355 }
356
357 m_clipping = FALSE;
358 }
359
360 // ---------------------------------------------------------------------------
361 // query capabilities
362 // ---------------------------------------------------------------------------
363
364 bool wxDC::CanDrawBitmap() const
365 {
366 return TRUE;
367 }
368
369 bool wxDC::CanGetTextExtent() const
370 {
371 #ifdef __WXMICROWIN__
372 // TODO Extend MicroWindows' GetDeviceCaps function
373 return TRUE;
374 #else
375 // What sort of display is it?
376 int technology = ::GetDeviceCaps(GetHdc(), TECHNOLOGY);
377
378 return (technology == DT_RASDISPLAY) || (technology == DT_RASPRINTER);
379 #endif
380 }
381
382 int wxDC::GetDepth() const
383 {
384 #ifdef __WXMICROWIN__
385 if (!GetHDC()) return 16;
386 #endif
387
388 return (int)::GetDeviceCaps(GetHdc(), BITSPIXEL);
389 }
390
391 // ---------------------------------------------------------------------------
392 // drawing
393 // ---------------------------------------------------------------------------
394
395 void wxDC::Clear()
396 {
397 #ifdef __WXMICROWIN__
398 if (!GetHDC()) return;
399 #endif
400
401 RECT rect;
402 if ( m_canvas )
403 {
404 GetClientRect((HWND) m_canvas->GetHWND(), &rect);
405 }
406 else
407 {
408 // No, I think we should simply ignore this if printing on e.g.
409 // a printer DC.
410 // wxCHECK_RET( m_selectedBitmap.Ok(), wxT("this DC can't be cleared") );
411 if (!m_selectedBitmap.Ok())
412 return;
413
414 rect.left = 0; rect.top = 0;
415 rect.right = m_selectedBitmap.GetWidth();
416 rect.bottom = m_selectedBitmap.GetHeight();
417 }
418
419 (void) ::SetMapMode(GetHdc(), MM_TEXT);
420
421 DWORD colour = GetBkColor(GetHdc());
422 HBRUSH brush = CreateSolidBrush(colour);
423 FillRect(GetHdc(), &rect, brush);
424 DeleteObject(brush);
425
426 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
427 ::SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
428 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
429 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
430 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
431 }
432
433 void wxDC::DoFloodFill(wxCoord x, wxCoord y, const wxColour& col, int style)
434 {
435 #ifdef __WXMICROWIN__
436 if (!GetHDC()) return;
437 #endif
438
439 if ( !::ExtFloodFill(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
440 col.GetPixel(),
441 style == wxFLOOD_SURFACE ? FLOODFILLSURFACE
442 : FLOODFILLBORDER) )
443 {
444 // quoting from the MSDN docs:
445 //
446 // Following are some of the reasons this function might fail:
447 //
448 // * The filling could not be completed.
449 // * The specified point has the boundary color specified by the
450 // crColor parameter (if FLOODFILLBORDER was requested).
451 // * The specified point does not have the color specified by
452 // crColor (if FLOODFILLSURFACE was requested)
453 // * The point is outside the clipping region that is, it is not
454 // visible on the device.
455 //
456 wxLogLastError(wxT("ExtFloodFill"));
457 }
458
459 CalcBoundingBox(x, y);
460 }
461
462 bool wxDC::DoGetPixel(wxCoord x, wxCoord y, wxColour *col) const
463 {
464 #ifdef __WXMICROWIN__
465 if (!GetHDC()) return FALSE;
466 #endif
467
468 wxCHECK_MSG( col, FALSE, _T("NULL colour parameter in wxDC::GetPixel") );
469
470 // get the color of the pixel
471 COLORREF pixelcolor = ::GetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y));
472
473 wxRGBToColour(*col, pixelcolor);
474
475 return TRUE;
476 }
477
478 void wxDC::DoCrossHair(wxCoord x, wxCoord y)
479 {
480 #ifdef __WXMICROWIN__
481 if (!GetHDC()) return;
482 #endif
483
484 wxCoord x1 = x-VIEWPORT_EXTENT;
485 wxCoord y1 = y-VIEWPORT_EXTENT;
486 wxCoord x2 = x+VIEWPORT_EXTENT;
487 wxCoord y2 = y+VIEWPORT_EXTENT;
488
489 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y), NULL);
490 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y));
491
492 (void)MoveToEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y1), NULL);
493 (void)LineTo(GetHdc(), XLOG2DEV(x), YLOG2DEV(y2));
494
495 CalcBoundingBox(x1, y1);
496 CalcBoundingBox(x2, y2);
497 }
498
499 void wxDC::DoDrawLine(wxCoord x1, wxCoord y1, wxCoord x2, wxCoord y2)
500 {
501 #ifdef __WXMICROWIN__
502 if (!GetHDC()) return;
503 #endif
504
505 (void)MoveToEx(GetHdc(), XLOG2DEV(x1), YLOG2DEV(y1), NULL);
506 (void)LineTo(GetHdc(), XLOG2DEV(x2), YLOG2DEV(y2));
507
508 // Normalization: Windows doesn't draw the last point of the line.
509 // But apparently neither does GTK+, so we take it out again.
510 // (void)LineTo(GetHdc(), XLOG2DEV(x2) + 1, YLOG2DEV(y2));
511
512 CalcBoundingBox(x1, y1);
513 CalcBoundingBox(x2, y2);
514 }
515
516 // Draws an arc of a circle, centred on (xc, yc), with starting point (x1, y1)
517 // and ending at (x2, y2)
518 void wxDC::DoDrawArc(wxCoord x1, wxCoord y1,
519 wxCoord x2, wxCoord y2,
520 wxCoord xc, wxCoord yc)
521 {
522 #ifdef __WXMICROWIN__
523 if (!GetHDC()) return;
524 #endif
525
526 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
527
528 double dx = xc - x1;
529 double dy = yc - y1;
530 double radius = (double)sqrt(dx*dx+dy*dy);
531 wxCoord r = (wxCoord)radius;
532
533 // treat the special case of full circle separately
534 if ( x1 == x2 && y1 == y2 )
535 {
536 DrawEllipse(xc - r, yc - r, 2*r, 2*r);
537 return;
538 }
539
540 wxCoord xx1 = XLOG2DEV(x1);
541 wxCoord yy1 = YLOG2DEV(y1);
542 wxCoord xx2 = XLOG2DEV(x2);
543 wxCoord yy2 = YLOG2DEV(y2);
544 wxCoord xxc = XLOG2DEV(xc);
545 wxCoord yyc = YLOG2DEV(yc);
546 wxCoord ray = (wxCoord) sqrt(double((xxc-xx1)*(xxc-xx1)+(yyc-yy1)*(yyc-yy1)));
547
548 wxCoord xxx1 = (wxCoord) (xxc-ray);
549 wxCoord yyy1 = (wxCoord) (yyc-ray);
550 wxCoord xxx2 = (wxCoord) (xxc+ray);
551 wxCoord yyy2 = (wxCoord) (yyc+ray);
552
553 if ( m_brush.Ok() && m_brush.GetStyle() != wxTRANSPARENT )
554 {
555 // Have to add 1 to bottom-right corner of rectangle
556 // to make semi-circles look right (crooked line otherwise).
557 // Unfortunately this is not a reliable method, depends
558 // on the size of shape.
559 // TODO: figure out why this happens!
560 Pie(GetHdc(),xxx1,yyy1,xxx2+1,yyy2+1, xx1,yy1,xx2,yy2);
561 }
562 else
563 {
564 Arc(GetHdc(),xxx1,yyy1,xxx2,yyy2, xx1,yy1,xx2,yy2);
565 }
566
567 CalcBoundingBox(xc - r, yc - r);
568 CalcBoundingBox(xc + r, yc + r);
569 }
570
571 void wxDC::DoDrawCheckMark(wxCoord x1, wxCoord y1,
572 wxCoord width, wxCoord height)
573 {
574 #ifdef __WXMICROWIN__
575 if (!GetHDC()) return;
576 #endif
577
578 wxCoord x2 = x1 + width,
579 y2 = y1 + height;
580
581 #if defined(__WIN32__) && !defined(__SC__) && !defined(__WXMICROWIN__)
582 RECT rect;
583 rect.left = x1;
584 rect.top = y1;
585 rect.right = x2;
586 rect.bottom = y2;
587
588 DrawFrameControl(GetHdc(), &rect, DFC_MENU, DFCS_MENUCHECK);
589 #else // Win16
590 // In WIN16, draw a cross
591 HPEN blackPen = ::CreatePen(PS_SOLID, 1, RGB(0, 0, 0));
592 HPEN whiteBrush = (HPEN)::GetStockObject(WHITE_BRUSH);
593 HPEN hPenOld = (HPEN)::SelectObject(GetHdc(), blackPen);
594 HPEN hBrushOld = (HPEN)::SelectObject(GetHdc(), whiteBrush);
595 ::SetROP2(GetHdc(), R2_COPYPEN);
596 Rectangle(GetHdc(), x1, y1, x2, y2);
597 MoveToEx(GetHdc(), x1, y1, NULL);
598 LineTo(GetHdc(), x2, y2);
599 MoveToEx(GetHdc(), x2, y1, NULL);
600 LineTo(GetHdc(), x1, y2);
601 ::SelectObject(GetHdc(), hPenOld);
602 ::SelectObject(GetHdc(), hBrushOld);
603 ::DeleteObject(blackPen);
604 #endif // Win32/16
605
606 CalcBoundingBox(x1, y1);
607 CalcBoundingBox(x2, y2);
608 }
609
610 void wxDC::DoDrawPoint(wxCoord x, wxCoord y)
611 {
612 #ifdef __WXMICROWIN__
613 if (!GetHDC()) return;
614 #endif
615
616 COLORREF color = 0x00ffffff;
617 if (m_pen.Ok())
618 {
619 color = m_pen.GetColour().GetPixel();
620 }
621
622 SetPixel(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), color);
623
624 CalcBoundingBox(x, y);
625 }
626
627 void wxDC::DoDrawPolygon(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset,int fillStyle)
628 {
629 #ifdef __WXMICROWIN__
630 if (!GetHDC()) return;
631 #endif
632
633 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
634
635 // Do things less efficiently if we have offsets
636 if (xoffset != 0 || yoffset != 0)
637 {
638 POINT *cpoints = new POINT[n];
639 int i;
640 for (i = 0; i < n; i++)
641 {
642 cpoints[i].x = (int)(points[i].x + xoffset);
643 cpoints[i].y = (int)(points[i].y + yoffset);
644
645 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
646 }
647 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
648 (void)Polygon(GetHdc(), cpoints, n);
649 SetPolyFillMode(GetHdc(),prev);
650 delete[] cpoints;
651 }
652 else
653 {
654 int i;
655 for (i = 0; i < n; i++)
656 CalcBoundingBox(points[i].x, points[i].y);
657
658 int prev = SetPolyFillMode(GetHdc(),fillStyle==wxODDEVEN_RULE?ALTERNATE:WINDING);
659 (void)Polygon(GetHdc(), (POINT*) points, n);
660 SetPolyFillMode(GetHdc(),prev);
661 }
662 }
663
664 void wxDC::DoDrawLines(int n, wxPoint points[], wxCoord xoffset, wxCoord yoffset)
665 {
666 #ifdef __WXMICROWIN__
667 if (!GetHDC()) return;
668 #endif
669
670 // Do things less efficiently if we have offsets
671 if (xoffset != 0 || yoffset != 0)
672 {
673 POINT *cpoints = new POINT[n];
674 int i;
675 for (i = 0; i < n; i++)
676 {
677 cpoints[i].x = (int)(points[i].x + xoffset);
678 cpoints[i].y = (int)(points[i].y + yoffset);
679
680 CalcBoundingBox(cpoints[i].x, cpoints[i].y);
681 }
682 (void)Polyline(GetHdc(), cpoints, n);
683 delete[] cpoints;
684 }
685 else
686 {
687 int i;
688 for (i = 0; i < n; i++)
689 CalcBoundingBox(points[i].x, points[i].y);
690
691 (void)Polyline(GetHdc(), (POINT*) points, n);
692 }
693 }
694
695 void wxDC::DoDrawRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
696 {
697 #ifdef __WXMICROWIN__
698 if (!GetHDC()) return;
699 #endif
700
701 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
702
703 wxCoord x2 = x + width;
704 wxCoord y2 = y + height;
705
706 if ((m_logicalFunction == wxCOPY) && (m_pen.GetStyle() == wxTRANSPARENT))
707 {
708 RECT rect;
709 rect.left = XLOG2DEV(x);
710 rect.top = YLOG2DEV(y);
711 rect.right = XLOG2DEV(x2);
712 rect.bottom = YLOG2DEV(y2);
713 (void)FillRect(GetHdc(), &rect, (HBRUSH)m_brush.GetResourceHandle() );
714 }
715 else
716 {
717 // Windows draws the filled rectangles without outline (i.e. drawn with a
718 // transparent pen) one pixel smaller in both directions and we want them
719 // to have the same size regardless of which pen is used - adjust
720
721 // I wonder if this shouldn´t be done after the LOG2DEV() conversions. RR.
722 if ( m_pen.GetStyle() == wxTRANSPARENT )
723 {
724 x2++;
725 y2++;
726 }
727
728 (void)Rectangle(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
729 }
730
731
732 CalcBoundingBox(x, y);
733 CalcBoundingBox(x2, y2);
734 }
735
736 void wxDC::DoDrawRoundedRectangle(wxCoord x, wxCoord y, wxCoord width, wxCoord height, double radius)
737 {
738 #ifdef __WXMICROWIN__
739 if (!GetHDC()) return;
740 #endif
741
742 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
743
744 // Now, a negative radius value is interpreted to mean
745 // 'the proportion of the smallest X or Y dimension'
746
747 if (radius < 0.0)
748 {
749 double smallest = 0.0;
750 if (width < height)
751 smallest = width;
752 else
753 smallest = height;
754 radius = (- radius * smallest);
755 }
756
757 wxCoord x2 = (x+width);
758 wxCoord y2 = (y+height);
759
760 // Windows draws the filled rectangles without outline (i.e. drawn with a
761 // transparent pen) one pixel smaller in both directions and we want them
762 // to have the same size regardless of which pen is used - adjust
763 if ( m_pen.GetStyle() == wxTRANSPARENT )
764 {
765 x2++;
766 y2++;
767 }
768
769 (void)RoundRect(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2),
770 YLOG2DEV(y2), (int) (2*XLOG2DEV(radius)), (int)( 2*YLOG2DEV(radius)));
771
772 CalcBoundingBox(x, y);
773 CalcBoundingBox(x2, y2);
774 }
775
776 void wxDC::DoDrawEllipse(wxCoord x, wxCoord y, wxCoord width, wxCoord height)
777 {
778 #ifdef __WXMICROWIN__
779 if (!GetHDC()) return;
780 #endif
781
782 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
783
784 wxCoord x2 = (x+width);
785 wxCoord y2 = (y+height);
786
787 (void)Ellipse(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2));
788
789 CalcBoundingBox(x, y);
790 CalcBoundingBox(x2, y2);
791 }
792
793 // Chris Breeze 20/5/98: first implementation of DrawEllipticArc on Windows
794 void wxDC::DoDrawEllipticArc(wxCoord x,wxCoord y,wxCoord w,wxCoord h,double sa,double ea)
795 {
796 #ifdef __WXMICROWIN__
797 if (!GetHDC()) return;
798 #endif
799
800 wxColourChanger cc(*this); // needed for wxSTIPPLE_MASK_OPAQUE handling
801
802 wxCoord x2 = x + w;
803 wxCoord y2 = y + h;
804
805 int rx1 = XLOG2DEV(x+w/2);
806 int ry1 = YLOG2DEV(y+h/2);
807 int rx2 = rx1;
808 int ry2 = ry1;
809
810 sa = DegToRad(sa);
811 ea = DegToRad(ea);
812
813 rx1 += (int)(100.0 * abs(w) * cos(sa));
814 ry1 -= (int)(100.0 * abs(h) * m_signY * sin(sa));
815 rx2 += (int)(100.0 * abs(w) * cos(ea));
816 ry2 -= (int)(100.0 * abs(h) * m_signY * sin(ea));
817
818 // draw pie with NULL_PEN first and then outline otherwise a line is
819 // drawn from the start and end points to the centre
820 HPEN hpenOld = (HPEN) ::SelectObject(GetHdc(), (HPEN) ::GetStockObject(NULL_PEN));
821 if (m_signY > 0)
822 {
823 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2)+1, YLOG2DEV(y2)+1,
824 rx1, ry1, rx2, ry2);
825 }
826 else
827 {
828 (void)Pie(GetHdc(), XLOG2DEV(x), YLOG2DEV(y)-1, XLOG2DEV(x2)+1, YLOG2DEV(y2),
829 rx1, ry1-1, rx2, ry2-1);
830 }
831
832 ::SelectObject(GetHdc(), hpenOld);
833
834 (void)Arc(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), XLOG2DEV(x2), YLOG2DEV(y2),
835 rx1, ry1, rx2, ry2);
836
837 CalcBoundingBox(x, y);
838 CalcBoundingBox(x2, y2);
839 }
840
841 void wxDC::DoDrawIcon(const wxIcon& icon, wxCoord x, wxCoord y)
842 {
843 #ifdef __WXMICROWIN__
844 if (!GetHDC()) return;
845 #endif
846
847 wxCHECK_RET( icon.Ok(), wxT("invalid icon in DrawIcon") );
848
849 #ifdef __WIN32__
850 ::DrawIconEx(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon), icon.GetWidth(), icon.GetHeight(), 0, NULL, DI_NORMAL);
851 #else
852 ::DrawIcon(GetHdc(), XLOG2DEV(x), YLOG2DEV(y), GetHiconOf(icon));
853 #endif
854
855 CalcBoundingBox(x, y);
856 CalcBoundingBox(x + icon.GetWidth(), y + icon.GetHeight());
857 }
858
859 void wxDC::DoDrawBitmap( const wxBitmap &bmp, wxCoord x, wxCoord y, bool useMask )
860 {
861 #ifdef __WXMICROWIN__
862 if (!GetHDC()) return;
863 #endif
864
865 wxCHECK_RET( bmp.Ok(), _T("invalid bitmap in wxDC::DrawBitmap") );
866
867 int width = bmp.GetWidth(),
868 height = bmp.GetHeight();
869
870 HBITMAP hbmpMask = 0;
871
872 if ( useMask )
873 {
874 wxMask *mask = bmp.GetMask();
875 if ( mask )
876 hbmpMask = (HBITMAP)mask->GetMaskBitmap();
877
878 if ( !hbmpMask )
879 {
880 // don't give assert here because this would break existing
881 // programs - just silently ignore useMask parameter
882 useMask = FALSE;
883 }
884 }
885
886 if ( useMask )
887 {
888 #ifdef __WIN32__
889 // use MaskBlt() with ROP which doesn't do anything to dst in the mask
890 // points
891 // On some systems, MaskBlt succeeds yet is much much slower
892 // than the wxWindows fall-back implementation. So we need
893 // to be able to switch this on and off at runtime.
894 bool ok = FALSE;
895 #if wxUSE_SYSTEM_OPTIONS
896 if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
897 #endif
898 {
899 HDC hdcMem = ::CreateCompatibleDC(GetHdc());
900 ::SelectObject(hdcMem, GetHbitmapOf(bmp));
901
902 ok = ::MaskBlt(GetHdc(), x, y, width, height,
903 hdcMem, 0, 0,
904 hbmpMask, 0, 0,
905 MAKEROP4(SRCCOPY, DSTCOPY)) != 0;
906 ::DeleteDC(hdcMem);
907 }
908
909 if ( !ok )
910 #endif // Win32
911 {
912 // Rather than reproduce wxDC::Blit, let's do it at the wxWin API
913 // level
914 wxMemoryDC memDC;
915 memDC.SelectObject(bmp);
916
917 Blit(x, y, width, height, &memDC, 0, 0, wxCOPY, useMask);
918
919 memDC.SelectObject(wxNullBitmap);
920 }
921 }
922 else // no mask, just use BitBlt()
923 {
924 HDC cdc = GetHdc();
925 HDC memdc = ::CreateCompatibleDC( cdc );
926 HBITMAP hbitmap = (HBITMAP) bmp.GetHBITMAP( );
927
928 wxASSERT_MSG( hbitmap, wxT("bitmap is ok but HBITMAP is NULL?") );
929
930 COLORREF old_textground = ::GetTextColor(GetHdc());
931 COLORREF old_background = ::GetBkColor(GetHdc());
932 if (m_textForegroundColour.Ok())
933 {
934 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
935 }
936 if (m_textBackgroundColour.Ok())
937 {
938 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
939 }
940
941 ::SelectObject( memdc, hbitmap );
942 ::BitBlt( cdc, x, y, width, height, memdc, 0, 0, SRCCOPY);
943 ::DeleteDC( memdc );
944
945 ::SetTextColor(GetHdc(), old_textground);
946 ::SetBkColor(GetHdc(), old_background);
947 }
948 }
949
950 void wxDC::DoDrawText(const wxString& text, wxCoord x, wxCoord y)
951 {
952 #ifdef __WXMICROWIN__
953 if (!GetHDC()) return;
954 #endif
955
956 DrawAnyText(text, x, y);
957
958 // update the bounding box
959 CalcBoundingBox(x, y);
960
961 wxCoord w, h;
962 GetTextExtent(text, &w, &h);
963 CalcBoundingBox(x + w, y + h);
964 }
965
966 void wxDC::DrawAnyText(const wxString& text, wxCoord x, wxCoord y)
967 {
968 #ifdef __WXMICROWIN__
969 if (!GetHDC()) return;
970 #endif
971
972 // prepare for drawing the text
973 if ( m_textForegroundColour.Ok() )
974 SetTextColor(GetHdc(), m_textForegroundColour.GetPixel());
975
976 DWORD old_background = 0;
977 if ( m_textBackgroundColour.Ok() )
978 {
979 old_background = SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
980 }
981
982 SetBkMode(GetHdc(), m_backgroundMode == wxTRANSPARENT ? TRANSPARENT
983 : OPAQUE);
984
985 if ( ::TextOut(GetHdc(), XLOG2DEV(x), YLOG2DEV(y),
986 text.c_str(), text.length()) == 0 )
987 {
988 wxLogLastError(wxT("TextOut"));
989 }
990
991 // restore the old parameters (text foreground colour may be left because
992 // it never is set to anything else, but background should remain
993 // transparent even if we just drew an opaque string)
994 if ( m_textBackgroundColour.Ok() )
995 (void)SetBkColor(GetHdc(), old_background);
996
997 SetBkMode(GetHdc(), TRANSPARENT);
998 }
999
1000 void wxDC::DoDrawRotatedText(const wxString& text,
1001 wxCoord x, wxCoord y,
1002 double angle)
1003 {
1004 #ifdef __WXMICROWIN__
1005 if (!GetHDC()) return;
1006 #endif
1007
1008 // we test that we have some font because otherwise we should still use the
1009 // "else" part below to avoid that DrawRotatedText(angle = 180) and
1010 // DrawRotatedText(angle = 0) use different fonts (we can't use the default
1011 // font for drawing rotated fonts unfortunately)
1012 if ( (angle == 0.0) && m_font.Ok() )
1013 {
1014 DoDrawText(text, x, y);
1015 }
1016 #ifndef __WXMICROWIN__
1017 else
1018 {
1019 // NB: don't take DEFAULT_GUI_FONT (a.k.a. wxSYS_DEFAULT_GUI_FONT)
1020 // because it's not TrueType and so can't have non zero
1021 // orientation/escapement under Win9x
1022 wxFont font = m_font.Ok() ? m_font : *wxSWISS_FONT;
1023 HFONT hfont = (HFONT)font.GetResourceHandle();
1024 LOGFONT lf;
1025 if ( ::GetObject(hfont, sizeof(lf), &lf) == 0 )
1026 {
1027 wxLogLastError(wxT("GetObject(hfont)"));
1028 }
1029
1030 // GDI wants the angle in tenth of degree
1031 long angle10 = (long)(angle * 10);
1032 lf.lfEscapement = angle10;
1033 lf. lfOrientation = angle10;
1034
1035 hfont = ::CreateFontIndirect(&lf);
1036 if ( !hfont )
1037 {
1038 wxLogLastError(wxT("CreateFont"));
1039 }
1040 else
1041 {
1042 HFONT hfontOld = (HFONT)::SelectObject(GetHdc(), hfont);
1043
1044 DrawAnyText(text, x, y);
1045
1046 (void)::SelectObject(GetHdc(), hfontOld);
1047 (void)::DeleteObject(hfont);
1048 }
1049
1050 // call the bounding box by adding all four vertices of the rectangle
1051 // containing the text to it (simpler and probably not slower than
1052 // determining which of them is really topmost/leftmost/...)
1053 wxCoord w, h;
1054 GetTextExtent(text, &w, &h);
1055
1056 double rad = DegToRad(angle);
1057
1058 // "upper left" and "upper right"
1059 CalcBoundingBox(x, y);
1060 CalcBoundingBox(x + w*cos(rad), y - h*sin(rad));
1061
1062 // "bottom left" and "bottom right"
1063 x += (wxCoord)(h*sin(rad));
1064 y += (wxCoord)(h*cos(rad));
1065 CalcBoundingBox(x, y);
1066 CalcBoundingBox(x + h*sin(rad), y + h*cos(rad));
1067 }
1068 #endif
1069 }
1070
1071 // ---------------------------------------------------------------------------
1072 // set GDI objects
1073 // ---------------------------------------------------------------------------
1074
1075 #if wxUSE_PALETTE
1076
1077 void wxDC::SetPalette(const wxPalette& palette)
1078 {
1079 #ifdef __WXMICROWIN__
1080 if (!GetHDC()) return;
1081 #endif
1082
1083 // Set the old object temporarily, in case the assignment deletes an object
1084 // that's not yet selected out.
1085 if (m_oldPalette)
1086 {
1087 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
1088 m_oldPalette = 0;
1089 }
1090
1091 m_palette = palette;
1092
1093 if (!m_palette.Ok())
1094 {
1095 // Setting a NULL colourmap is a way of restoring
1096 // the original colourmap
1097 if (m_oldPalette)
1098 {
1099 ::SelectPalette(GetHdc(), (HPALETTE) m_oldPalette, TRUE);
1100 m_oldPalette = 0;
1101 }
1102
1103 return;
1104 }
1105
1106 if (m_palette.Ok() && m_palette.GetHPALETTE())
1107 {
1108 HPALETTE oldPal = ::SelectPalette(GetHdc(), (HPALETTE) m_palette.GetHPALETTE(), TRUE);
1109 if (!m_oldPalette)
1110 m_oldPalette = (WXHPALETTE) oldPal;
1111
1112 ::RealizePalette(GetHdc());
1113 }
1114 }
1115
1116 #endif // wxUSE_PALETTE
1117
1118 void wxDC::SetFont(const wxFont& the_font)
1119 {
1120 #ifdef __WXMICROWIN__
1121 if (!GetHDC()) return;
1122 #endif
1123
1124 // Set the old object temporarily, in case the assignment deletes an object
1125 // that's not yet selected out.
1126 if (m_oldFont)
1127 {
1128 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
1129 m_oldFont = 0;
1130 }
1131
1132 m_font = the_font;
1133
1134 if (!the_font.Ok())
1135 {
1136 if (m_oldFont)
1137 ::SelectObject(GetHdc(), (HFONT) m_oldFont);
1138 m_oldFont = 0;
1139 }
1140
1141 if (m_font.Ok() && m_font.GetResourceHandle())
1142 {
1143 HFONT f = (HFONT) ::SelectObject(GetHdc(), (HFONT) m_font.GetResourceHandle());
1144 if (f == (HFONT) NULL)
1145 {
1146 wxLogDebug(wxT("::SelectObject failed in wxDC::SetFont."));
1147 }
1148 if (!m_oldFont)
1149 m_oldFont = (WXHFONT) f;
1150 }
1151 }
1152
1153 void wxDC::SetPen(const wxPen& pen)
1154 {
1155 #ifdef __WXMICROWIN__
1156 if (!GetHDC()) return;
1157 #endif
1158
1159 // Set the old object temporarily, in case the assignment deletes an object
1160 // that's not yet selected out.
1161 if (m_oldPen)
1162 {
1163 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
1164 m_oldPen = 0;
1165 }
1166
1167 m_pen = pen;
1168
1169 if (!m_pen.Ok())
1170 {
1171 if (m_oldPen)
1172 ::SelectObject(GetHdc(), (HPEN) m_oldPen);
1173 m_oldPen = 0;
1174 }
1175
1176 if (m_pen.Ok())
1177 {
1178 if (m_pen.GetResourceHandle())
1179 {
1180 HPEN p = (HPEN) ::SelectObject(GetHdc(), (HPEN)m_pen.GetResourceHandle());
1181 if (!m_oldPen)
1182 m_oldPen = (WXHPEN) p;
1183 }
1184 }
1185 }
1186
1187 void wxDC::SetBrush(const wxBrush& brush)
1188 {
1189 #ifdef __WXMICROWIN__
1190 if (!GetHDC()) return;
1191 #endif
1192
1193 // Set the old object temporarily, in case the assignment deletes an object
1194 // that's not yet selected out.
1195 if (m_oldBrush)
1196 {
1197 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1198 m_oldBrush = 0;
1199 }
1200
1201 m_brush = brush;
1202
1203 if (!m_brush.Ok())
1204 {
1205 if (m_oldBrush)
1206 ::SelectObject(GetHdc(), (HBRUSH) m_oldBrush);
1207 m_oldBrush = 0;
1208 }
1209
1210 if (m_brush.Ok())
1211 {
1212 // to make sure the brush is alligned with the logical coordinates
1213 wxBitmap *stipple = m_brush.GetStipple();
1214 if ( stipple && stipple->Ok() )
1215 {
1216 #ifdef __WIN32__
1217 ::SetBrushOrgEx(GetHdc(),
1218 m_deviceOriginX % stipple->GetWidth(),
1219 m_deviceOriginY % stipple->GetHeight(),
1220 NULL); // don't need previous brush origin
1221 #else
1222 ::SetBrushOrg(GetHdc(),
1223 m_deviceOriginX % stipple->GetWidth(),
1224 m_deviceOriginY % stipple->GetHeight());
1225 #endif
1226 }
1227
1228 if ( m_brush.GetResourceHandle() )
1229 {
1230 HBRUSH b = 0;
1231 b = (HBRUSH) ::SelectObject(GetHdc(), (HBRUSH)m_brush.GetResourceHandle());
1232 if (!m_oldBrush)
1233 m_oldBrush = (WXHBRUSH) b;
1234 }
1235 }
1236 }
1237
1238 void wxDC::SetBackground(const wxBrush& brush)
1239 {
1240 #ifdef __WXMICROWIN__
1241 if (!GetHDC()) return;
1242 #endif
1243
1244 m_backgroundBrush = brush;
1245
1246 if (!m_backgroundBrush.Ok())
1247 return;
1248
1249 if (m_canvas)
1250 {
1251 bool customColours = TRUE;
1252 // If we haven't specified wxUSER_COLOURS, don't allow the panel/dialog box to
1253 // change background colours from the control-panel specified colours.
1254 if (m_canvas->IsKindOf(CLASSINFO(wxWindow)) && ((m_canvas->GetWindowStyleFlag() & wxUSER_COLOURS) != wxUSER_COLOURS))
1255 customColours = FALSE;
1256
1257 if (customColours)
1258 {
1259 if (m_backgroundBrush.GetStyle()==wxTRANSPARENT)
1260 {
1261 m_canvas->SetTransparent(TRUE);
1262 }
1263 else
1264 {
1265 // New behaviour, 10/2/99: setting the background brush of a DC
1266 // doesn't affect the window background colour. However,
1267 // I'm leaving in the transparency setting because it's needed by
1268 // various controls (e.g. wxStaticText) to determine whether to draw
1269 // transparently or not. TODO: maybe this should be a new function
1270 // wxWindow::SetTransparency(). Should that apply to the child itself, or the
1271 // parent?
1272 // m_canvas->SetBackgroundColour(m_backgroundBrush.GetColour());
1273 m_canvas->SetTransparent(FALSE);
1274 }
1275 }
1276 }
1277 COLORREF new_color = m_backgroundBrush.GetColour().GetPixel();
1278 {
1279 (void)SetBkColor(GetHdc(), new_color);
1280 }
1281 }
1282
1283 void wxDC::SetBackgroundMode(int mode)
1284 {
1285 #ifdef __WXMICROWIN__
1286 if (!GetHDC()) return;
1287 #endif
1288
1289 m_backgroundMode = mode;
1290
1291 // SetBackgroundColour now only refers to text background
1292 // and m_backgroundMode is used there
1293
1294 /*
1295 if (m_backgroundMode == wxTRANSPARENT)
1296 ::SetBkMode(GetHdc(), TRANSPARENT);
1297 else
1298 ::SetBkMode(GetHdc(), OPAQUE);
1299 Last change: AC 29 Jan 101 8:54 pm
1300 */
1301 }
1302
1303 void wxDC::SetLogicalFunction(int function)
1304 {
1305 #ifdef __WXMICROWIN__
1306 if (!GetHDC()) return;
1307 #endif
1308
1309 m_logicalFunction = function;
1310
1311 SetRop(m_hDC);
1312 }
1313
1314 void wxDC::SetRop(WXHDC dc)
1315 {
1316 if ( !dc || m_logicalFunction < 0 )
1317 return;
1318
1319 int rop;
1320
1321 switch (m_logicalFunction)
1322 {
1323 case wxCLEAR: rop = R2_BLACK; break;
1324 case wxXOR: rop = R2_XORPEN; break;
1325 case wxINVERT: rop = R2_NOT; break;
1326 case wxOR_REVERSE: rop = R2_MERGEPENNOT; break;
1327 case wxAND_REVERSE: rop = R2_MASKPENNOT; break;
1328 case wxCOPY: rop = R2_COPYPEN; break;
1329 case wxAND: rop = R2_MASKPEN; break;
1330 case wxAND_INVERT: rop = R2_MASKNOTPEN; break;
1331 case wxNO_OP: rop = R2_NOP; break;
1332 case wxNOR: rop = R2_NOTMERGEPEN; break;
1333 case wxEQUIV: rop = R2_NOTXORPEN; break;
1334 case wxSRC_INVERT: rop = R2_NOTCOPYPEN; break;
1335 case wxOR_INVERT: rop = R2_MERGENOTPEN; break;
1336 case wxNAND: rop = R2_NOTMASKPEN; break;
1337 case wxOR: rop = R2_MERGEPEN; break;
1338 case wxSET: rop = R2_WHITE; break;
1339
1340 default:
1341 wxFAIL_MSG( wxT("unsupported logical function") );
1342 return;
1343 }
1344
1345 SetROP2(GetHdc(), rop);
1346 }
1347
1348 bool wxDC::StartDoc(const wxString& WXUNUSED(message))
1349 {
1350 // We might be previewing, so return TRUE to let it continue.
1351 return TRUE;
1352 }
1353
1354 void wxDC::EndDoc()
1355 {
1356 }
1357
1358 void wxDC::StartPage()
1359 {
1360 }
1361
1362 void wxDC::EndPage()
1363 {
1364 }
1365
1366 // ---------------------------------------------------------------------------
1367 // text metrics
1368 // ---------------------------------------------------------------------------
1369
1370 wxCoord wxDC::GetCharHeight() const
1371 {
1372 #ifdef __WXMICROWIN__
1373 if (!GetHDC()) return 0;
1374 #endif
1375
1376 TEXTMETRIC lpTextMetric;
1377
1378 GetTextMetrics(GetHdc(), &lpTextMetric);
1379
1380 return YDEV2LOGREL(lpTextMetric.tmHeight);
1381 }
1382
1383 wxCoord wxDC::GetCharWidth() const
1384 {
1385 #ifdef __WXMICROWIN__
1386 if (!GetHDC()) return 0;
1387 #endif
1388
1389 TEXTMETRIC lpTextMetric;
1390
1391 GetTextMetrics(GetHdc(), &lpTextMetric);
1392
1393 return XDEV2LOGREL(lpTextMetric.tmAveCharWidth);
1394 }
1395
1396 void wxDC::DoGetTextExtent(const wxString& string, wxCoord *x, wxCoord *y,
1397 wxCoord *descent, wxCoord *externalLeading,
1398 wxFont *font) const
1399 {
1400 #ifdef __WXMICROWIN__
1401 if (!GetHDC())
1402 {
1403 if (x) *x = 0;
1404 if (y) *y = 0;
1405 if (descent) *descent = 0;
1406 if (externalLeading) *externalLeading = 0;
1407 return;
1408 }
1409 #endif
1410
1411 HFONT hfontOld;
1412 if ( font )
1413 {
1414 wxASSERT_MSG( font->Ok(), _T("invalid font in wxDC::GetTextExtent") );
1415
1416 hfontOld = (HFONT)::SelectObject(GetHdc(), GetHfontOf(*font));
1417 }
1418 else // don't change the font
1419 {
1420 hfontOld = 0;
1421 }
1422
1423 SIZE sizeRect;
1424 TEXTMETRIC tm;
1425
1426 GetTextExtentPoint(GetHdc(), string, string.length(), &sizeRect);
1427 GetTextMetrics(GetHdc(), &tm);
1428
1429 if (x) *x = XDEV2LOGREL(sizeRect.cx);
1430 if (y) *y = YDEV2LOGREL(sizeRect.cy);
1431 if (descent) *descent = tm.tmDescent;
1432 if (externalLeading) *externalLeading = tm.tmExternalLeading;
1433
1434 if ( hfontOld )
1435 {
1436 ::SelectObject(GetHdc(), hfontOld);
1437 }
1438 }
1439
1440 void wxDC::SetMapMode(int mode)
1441 {
1442 #ifdef __WXMICROWIN__
1443 if (!GetHDC()) return;
1444 #endif
1445
1446 m_mappingMode = mode;
1447
1448 int pixel_width = 0;
1449 int pixel_height = 0;
1450 int mm_width = 0;
1451 int mm_height = 0;
1452
1453 pixel_width = GetDeviceCaps(GetHdc(), HORZRES);
1454 pixel_height = GetDeviceCaps(GetHdc(), VERTRES);
1455 mm_width = GetDeviceCaps(GetHdc(), HORZSIZE);
1456 mm_height = GetDeviceCaps(GetHdc(), VERTSIZE);
1457
1458 if ((pixel_width == 0) || (pixel_height == 0) || (mm_width == 0) || (mm_height == 0))
1459 {
1460 return;
1461 }
1462
1463 double mm2pixelsX = pixel_width/mm_width;
1464 double mm2pixelsY = pixel_height/mm_height;
1465
1466 switch (mode)
1467 {
1468 case wxMM_TWIPS:
1469 {
1470 m_logicalScaleX = (twips2mm * mm2pixelsX);
1471 m_logicalScaleY = (twips2mm * mm2pixelsY);
1472 break;
1473 }
1474 case wxMM_POINTS:
1475 {
1476 m_logicalScaleX = (pt2mm * mm2pixelsX);
1477 m_logicalScaleY = (pt2mm * mm2pixelsY);
1478 break;
1479 }
1480 case wxMM_METRIC:
1481 {
1482 m_logicalScaleX = mm2pixelsX;
1483 m_logicalScaleY = mm2pixelsY;
1484 break;
1485 }
1486 case wxMM_LOMETRIC:
1487 {
1488 m_logicalScaleX = (mm2pixelsX/10.0);
1489 m_logicalScaleY = (mm2pixelsY/10.0);
1490 break;
1491 }
1492 default:
1493 case wxMM_TEXT:
1494 {
1495 m_logicalScaleX = 1.0;
1496 m_logicalScaleY = 1.0;
1497 break;
1498 }
1499 }
1500
1501 if (::GetMapMode(GetHdc()) != MM_ANISOTROPIC)
1502 ::SetMapMode(GetHdc(), MM_ANISOTROPIC);
1503
1504 SetViewportExtEx(GetHdc(), VIEWPORT_EXTENT, VIEWPORT_EXTENT, NULL);
1505 m_windowExtX = (int)MS_XDEV2LOGREL(VIEWPORT_EXTENT);
1506 m_windowExtY = (int)MS_YDEV2LOGREL(VIEWPORT_EXTENT);
1507 ::SetWindowExtEx(GetHdc(), m_windowExtX, m_windowExtY, NULL);
1508 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1509 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1510 }
1511
1512 void wxDC::SetUserScale(double x, double y)
1513 {
1514 #ifdef __WXMICROWIN__
1515 if (!GetHDC()) return;
1516 #endif
1517
1518 m_userScaleX = x;
1519 m_userScaleY = y;
1520
1521 SetMapMode(m_mappingMode);
1522 }
1523
1524 void wxDC::SetAxisOrientation(bool xLeftRight, bool yBottomUp)
1525 {
1526 #ifdef __WXMICROWIN__
1527 if (!GetHDC()) return;
1528 #endif
1529
1530 m_signX = xLeftRight ? 1 : -1;
1531 m_signY = yBottomUp ? -1 : 1;
1532
1533 SetMapMode(m_mappingMode);
1534 }
1535
1536 void wxDC::SetSystemScale(double x, double y)
1537 {
1538 #ifdef __WXMICROWIN__
1539 if (!GetHDC()) return;
1540 #endif
1541
1542 m_scaleX = x;
1543 m_scaleY = y;
1544
1545 SetMapMode(m_mappingMode);
1546 }
1547
1548 void wxDC::SetLogicalOrigin(wxCoord x, wxCoord y)
1549 {
1550 #ifdef __WXMICROWIN__
1551 if (!GetHDC()) return;
1552 #endif
1553
1554 m_logicalOriginX = x;
1555 m_logicalOriginY = y;
1556
1557 ::SetWindowOrgEx(GetHdc(), (int)m_logicalOriginX, (int)m_logicalOriginY, NULL);
1558 }
1559
1560 void wxDC::SetDeviceOrigin(wxCoord x, wxCoord y)
1561 {
1562 #ifdef __WXMICROWIN__
1563 if (!GetHDC()) return;
1564 #endif
1565
1566 m_deviceOriginX = x;
1567 m_deviceOriginY = y;
1568
1569 ::SetViewportOrgEx(GetHdc(), (int)m_deviceOriginX, (int)m_deviceOriginY, NULL);
1570 }
1571
1572 // ---------------------------------------------------------------------------
1573 // coordinates transformations
1574 // ---------------------------------------------------------------------------
1575
1576 wxCoord wxDCBase::DeviceToLogicalX(wxCoord x) const
1577 {
1578 double xRel = x - m_deviceOriginX;
1579 xRel /= m_logicalScaleX*m_userScaleX*m_signX*m_scaleX;
1580 return (wxCoord)(xRel + m_logicalOriginX);
1581 }
1582
1583 wxCoord wxDCBase::DeviceToLogicalXRel(wxCoord x) const
1584 {
1585 return (wxCoord) ((x)/(m_logicalScaleX*m_userScaleX*m_signX*m_scaleX));
1586 }
1587
1588 wxCoord wxDCBase::DeviceToLogicalY(wxCoord y) const
1589 {
1590 double yRel = y - m_deviceOriginY;
1591 yRel /= m_logicalScaleY*m_userScaleY*m_signY*m_scaleY;
1592 return (wxCoord)(yRel + m_logicalOriginY);
1593 }
1594
1595 wxCoord wxDCBase::DeviceToLogicalYRel(wxCoord y) const
1596 {
1597 return (wxCoord) ((y)/(m_logicalScaleY*m_userScaleY*m_signY*m_scaleY));
1598 }
1599
1600 wxCoord wxDCBase::LogicalToDeviceX(wxCoord x) const
1601 {
1602 return (wxCoord) ((x - m_logicalOriginX)*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX + m_deviceOriginX);
1603 }
1604
1605 wxCoord wxDCBase::LogicalToDeviceXRel(wxCoord x) const
1606 {
1607 return (wxCoord) (x*m_logicalScaleX*m_userScaleX*m_signX*m_scaleX);
1608 }
1609
1610 wxCoord wxDCBase::LogicalToDeviceY(wxCoord y) const
1611 {
1612 return (wxCoord) ((y - m_logicalOriginY)*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY + m_deviceOriginY);
1613 }
1614
1615 wxCoord wxDCBase::LogicalToDeviceYRel(wxCoord y) const
1616 {
1617 return (wxCoord) (y*m_logicalScaleY*m_userScaleY*m_signY*m_scaleY);
1618 }
1619
1620 // ---------------------------------------------------------------------------
1621 // bit blit
1622 // ---------------------------------------------------------------------------
1623
1624 bool wxDC::DoBlit(wxCoord xdest, wxCoord ydest,
1625 wxCoord width, wxCoord height,
1626 wxDC *source, wxCoord xsrc, wxCoord ysrc,
1627 int rop, bool useMask,
1628 wxCoord xsrcMask, wxCoord ysrcMask)
1629 {
1630 #ifdef __WXMICROWIN__
1631 if (!GetHDC()) return FALSE;
1632 #endif
1633
1634 wxMask *mask = NULL;
1635 if ( useMask )
1636 {
1637 const wxBitmap& bmp = source->m_selectedBitmap;
1638 mask = bmp.GetMask();
1639
1640 if ( !(bmp.Ok() && mask && mask->GetMaskBitmap()) )
1641 {
1642 // don't give assert here because this would break existing
1643 // programs - just silently ignore useMask parameter
1644 useMask = FALSE;
1645 }
1646 }
1647
1648 if (xsrcMask == -1 && ysrcMask == -1)
1649 {
1650 xsrcMask = xsrc; ysrcMask = ysrc;
1651 }
1652
1653 COLORREF old_textground = ::GetTextColor(GetHdc());
1654 COLORREF old_background = ::GetBkColor(GetHdc());
1655 if (m_textForegroundColour.Ok())
1656 {
1657 ::SetTextColor(GetHdc(), m_textForegroundColour.GetPixel() );
1658 }
1659 if (m_textBackgroundColour.Ok())
1660 {
1661 ::SetBkColor(GetHdc(), m_textBackgroundColour.GetPixel() );
1662 }
1663
1664 DWORD dwRop = SRCCOPY;
1665 switch (rop)
1666 {
1667 case wxXOR: dwRop = SRCINVERT; break;
1668 case wxINVERT: dwRop = DSTINVERT; break;
1669 case wxOR_REVERSE: dwRop = 0x00DD0228; break;
1670 case wxAND_REVERSE: dwRop = SRCERASE; break;
1671 case wxCLEAR: dwRop = BLACKNESS; break;
1672 case wxSET: dwRop = WHITENESS; break;
1673 case wxOR_INVERT: dwRop = MERGEPAINT; break;
1674 case wxAND: dwRop = SRCAND; break;
1675 case wxOR: dwRop = SRCPAINT; break;
1676 case wxEQUIV: dwRop = 0x00990066; break;
1677 case wxNAND: dwRop = 0x007700E6; break;
1678 case wxAND_INVERT: dwRop = 0x00220326; break;
1679 case wxCOPY: dwRop = SRCCOPY; break;
1680 case wxNO_OP: dwRop = DSTCOPY; break;
1681 case wxSRC_INVERT: dwRop = NOTSRCCOPY; break;
1682 case wxNOR: dwRop = NOTSRCCOPY; break;
1683 default:
1684 wxFAIL_MSG( wxT("unsupported logical function") );
1685 return FALSE;
1686 }
1687
1688 bool success = FALSE;
1689
1690 if (useMask)
1691 {
1692 #ifdef __WIN32__
1693 // we want the part of the image corresponding to the mask to be
1694 // transparent, so use "DSTCOPY" ROP for the mask points (the usual
1695 // meaning of fg and bg is inverted which corresponds to wxWin notion
1696 // of the mask which is also contrary to the Windows one)
1697
1698 // On some systems, MaskBlt succeeds yet is much much slower
1699 // than the wxWindows fall-back implementation. So we need
1700 // to be able to switch this on and off at runtime.
1701 #if wxUSE_SYSTEM_OPTIONS
1702 if (wxSystemOptions::GetOptionInt(wxT("no-maskblt")) == 0)
1703 #endif
1704 {
1705 success = ::MaskBlt(GetHdc(), xdest, ydest, width, height,
1706 GetHdcOf(*source), xsrc, ysrc,
1707 (HBITMAP)mask->GetMaskBitmap(), xsrcMask, ysrcMask,
1708 MAKEROP4(dwRop, DSTCOPY)) != 0;
1709 }
1710
1711 if ( !success )
1712 #endif // Win32
1713 {
1714 // Blit bitmap with mask
1715 HDC dc_mask ;
1716 HDC dc_buffer ;
1717 HBITMAP buffer_bmap ;
1718
1719 #if wxUSE_DC_CACHEING
1720 // create a temp buffer bitmap and DCs to access it and the mask
1721 wxDCCacheEntry* dcCacheEntry1 = FindDCInCache(NULL, source->GetHDC());
1722 dc_mask = (HDC) dcCacheEntry1->m_dc;
1723
1724 wxDCCacheEntry* dcCacheEntry2 = FindDCInCache(dcCacheEntry1, GetHDC());
1725 dc_buffer = (HDC) dcCacheEntry2->m_dc;
1726
1727 wxDCCacheEntry* bitmapCacheEntry = FindBitmapInCache(GetHDC(),
1728 width, height);
1729
1730 buffer_bmap = (HBITMAP) bitmapCacheEntry->m_bitmap;
1731 #else // !wxUSE_DC_CACHEING
1732 // create a temp buffer bitmap and DCs to access it and the mask
1733 dc_mask = ::CreateCompatibleDC(GetHdcOf(*source));
1734 dc_buffer = ::CreateCompatibleDC(GetHdc());
1735 buffer_bmap = ::CreateCompatibleBitmap(GetHdc(), width, height);
1736 #endif // wxUSE_DC_CACHEING/!wxUSE_DC_CACHEING
1737 ::SelectObject(dc_mask, (HBITMAP) mask->GetMaskBitmap());
1738 ::SelectObject(dc_buffer, buffer_bmap);
1739
1740 // copy dest to buffer
1741 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1742 GetHdc(), xdest, ydest, SRCCOPY) )
1743 {
1744 wxLogLastError(wxT("BitBlt"));
1745 }
1746
1747 // copy src to buffer using selected raster op
1748 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1749 GetHdcOf(*source), xsrc, ysrc, dwRop) )
1750 {
1751 wxLogLastError(wxT("BitBlt"));
1752 }
1753
1754 // set masked area in buffer to BLACK (pixel value 0)
1755 COLORREF prevBkCol = ::SetBkColor(GetHdc(), RGB(255, 255, 255));
1756 COLORREF prevCol = ::SetTextColor(GetHdc(), RGB(0, 0, 0));
1757 if ( !::BitBlt(dc_buffer, 0, 0, (int)width, (int)height,
1758 dc_mask, xsrcMask, ysrcMask, SRCAND) )
1759 {
1760 wxLogLastError(wxT("BitBlt"));
1761 }
1762
1763 // set unmasked area in dest to BLACK
1764 ::SetBkColor(GetHdc(), RGB(0, 0, 0));
1765 ::SetTextColor(GetHdc(), RGB(255, 255, 255));
1766 if ( !::BitBlt(GetHdc(), xdest, ydest, (int)width, (int)height,
1767 dc_mask, xsrcMask, ysrcMask, SRCAND) )
1768 {
1769 wxLogLastError(wxT("BitBlt"));
1770 }
1771 ::SetBkColor(GetHdc(), prevBkCol); // restore colours to original values
1772 ::SetTextColor(GetHdc(), prevCol);
1773
1774 // OR buffer to dest
1775 success = ::BitBlt(GetHdc(), xdest, ydest,
1776 (int)width, (int)height,
1777 dc_buffer, 0, 0, SRCPAINT) != 0;
1778 if ( !success )
1779 {
1780 wxLogLastError(wxT("BitBlt"));
1781 }
1782
1783 // tidy up temporary DCs and bitmap
1784 ::SelectObject(dc_mask, 0);
1785 ::SelectObject(dc_buffer, 0);
1786
1787 #if !wxUSE_DC_CACHEING
1788 {
1789 ::DeleteDC(dc_mask);
1790 ::DeleteDC(dc_buffer);
1791 ::DeleteObject(buffer_bmap);
1792 }
1793 #endif
1794 }
1795 }
1796 else // no mask, just BitBlt() it
1797 {
1798 success = ::BitBlt(GetHdc(), xdest, ydest,
1799 (int)width, (int)height,
1800 GetHdcOf(*source), xsrc, ysrc, dwRop) != 0;
1801 if ( !success )
1802 {
1803 wxLogLastError(wxT("BitBlt"));
1804 }
1805 }
1806 ::SetTextColor(GetHdc(), old_textground);
1807 ::SetBkColor(GetHdc(), old_background);
1808
1809 return success;
1810 }
1811
1812 void wxDC::DoGetSize(int *w, int *h) const
1813 {
1814 #ifdef __WXMICROWIN__
1815 if (!GetHDC()) return;
1816 #endif
1817
1818 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZRES);
1819 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTRES);
1820 }
1821
1822 void wxDC::DoGetSizeMM(int *w, int *h) const
1823 {
1824 #ifdef __WXMICROWIN__
1825 if (!GetHDC()) return;
1826 #endif
1827
1828 if ( w ) *w = ::GetDeviceCaps(GetHdc(), HORZSIZE);
1829 if ( h ) *h = ::GetDeviceCaps(GetHdc(), VERTSIZE);
1830 }
1831
1832 wxSize wxDC::GetPPI() const
1833 {
1834 #ifdef __WXMICROWIN__
1835 if (!GetHDC()) return wxSize();
1836 #endif
1837
1838 int x = ::GetDeviceCaps(GetHdc(), LOGPIXELSX);
1839 int y = ::GetDeviceCaps(GetHdc(), LOGPIXELSY);
1840
1841 return wxSize(x, y);
1842 }
1843
1844 // For use by wxWindows only, unless custom units are required.
1845 void wxDC::SetLogicalScale(double x, double y)
1846 {
1847 #ifdef __WXMICROWIN__
1848 if (!GetHDC()) return;
1849 #endif
1850
1851 m_logicalScaleX = x;
1852 m_logicalScaleY = y;
1853 }
1854
1855 #if WXWIN_COMPATIBILITY
1856 void wxDC::DoGetTextExtent(const wxString& string, float *x, float *y,
1857 float *descent, float *externalLeading,
1858 wxFont *theFont, bool use16bit) const
1859 {
1860 #ifdef __WXMICROWIN__
1861 if (!GetHDC()) return;
1862 #endif
1863
1864 wxCoord x1, y1, descent1, externalLeading1;
1865 GetTextExtent(string, & x1, & y1, & descent1, & externalLeading1, theFont, use16bit);
1866 *x = x1; *y = y1;
1867 if (descent)
1868 *descent = descent1;
1869 if (externalLeading)
1870 *externalLeading = externalLeading1;
1871 }
1872 #endif
1873
1874 #if wxUSE_DC_CACHEING
1875
1876 /*
1877 * This implementation is a bit ugly and uses the old-fashioned wxList class, so I will
1878 * improve it in due course, either using arrays, or simply storing pointers to one
1879 * entry for the bitmap, and two for the DCs. -- JACS
1880 */
1881
1882 wxList wxDC::sm_bitmapCache;
1883 wxList wxDC::sm_dcCache;
1884
1885 wxDCCacheEntry::wxDCCacheEntry(WXHBITMAP hBitmap, int w, int h, int depth)
1886 {
1887 m_bitmap = hBitmap;
1888 m_dc = 0;
1889 m_width = w;
1890 m_height = h;
1891 m_depth = depth;
1892 }
1893
1894 wxDCCacheEntry::wxDCCacheEntry(WXHDC hDC, int depth)
1895 {
1896 m_bitmap = 0;
1897 m_dc = hDC;
1898 m_width = 0;
1899 m_height = 0;
1900 m_depth = depth;
1901 }
1902
1903 wxDCCacheEntry::~wxDCCacheEntry()
1904 {
1905 if (m_bitmap)
1906 ::DeleteObject((HBITMAP) m_bitmap);
1907 if (m_dc)
1908 ::DeleteDC((HDC) m_dc);
1909 }
1910
1911 wxDCCacheEntry* wxDC::FindBitmapInCache(WXHDC dc, int w, int h)
1912 {
1913 int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL);
1914 wxNode* node = sm_bitmapCache.First();
1915 while (node)
1916 {
1917 wxDCCacheEntry* entry = (wxDCCacheEntry*) node->Data();
1918
1919 if (entry->m_depth == depth)
1920 {
1921 if (entry->m_width < w || entry->m_height < h)
1922 {
1923 ::DeleteObject((HBITMAP) entry->m_bitmap);
1924 entry->m_bitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h);
1925 if ( !entry->m_bitmap)
1926 {
1927 wxLogLastError(wxT("CreateCompatibleBitmap"));
1928 }
1929 entry->m_width = w; entry->m_height = h;
1930 return entry;
1931 }
1932 return entry;
1933 }
1934
1935 node = node->Next();
1936 }
1937 WXHBITMAP hBitmap = (WXHBITMAP) ::CreateCompatibleBitmap((HDC) dc, w, h);
1938 if ( !hBitmap)
1939 {
1940 wxLogLastError(wxT("CreateCompatibleBitmap"));
1941 }
1942 wxDCCacheEntry* entry = new wxDCCacheEntry(hBitmap, w, h, depth);
1943 AddToBitmapCache(entry);
1944 return entry;
1945 }
1946
1947 wxDCCacheEntry* wxDC::FindDCInCache(wxDCCacheEntry* notThis, WXHDC dc)
1948 {
1949 int depth = ::GetDeviceCaps((HDC) dc, PLANES) * ::GetDeviceCaps((HDC) dc, BITSPIXEL);
1950 wxNode* node = sm_dcCache.First();
1951 while (node)
1952 {
1953 wxDCCacheEntry* entry = (wxDCCacheEntry*) node->Data();
1954
1955 // Don't return the same one as we already have
1956 if (!notThis || (notThis != entry))
1957 {
1958 if (entry->m_depth == depth)
1959 {
1960 return entry;
1961 }
1962 }
1963
1964 node = node->Next();
1965 }
1966 WXHDC hDC = (WXHDC) ::CreateCompatibleDC((HDC) dc);
1967 if ( !hDC)
1968 {
1969 wxLogLastError(wxT("CreateCompatibleDC"));
1970 }
1971 wxDCCacheEntry* entry = new wxDCCacheEntry(hDC, depth);
1972 AddToDCCache(entry);
1973 return entry;
1974 }
1975
1976 void wxDC::AddToBitmapCache(wxDCCacheEntry* entry)
1977 {
1978 sm_bitmapCache.Append(entry);
1979 }
1980
1981 void wxDC::AddToDCCache(wxDCCacheEntry* entry)
1982 {
1983 sm_dcCache.Append(entry);
1984 }
1985
1986 void wxDC::ClearCache()
1987 {
1988 sm_bitmapCache.DeleteContents(TRUE);
1989 sm_bitmapCache.Clear();
1990 sm_bitmapCache.DeleteContents(FALSE);
1991 sm_dcCache.DeleteContents(TRUE);
1992 sm_dcCache.Clear();
1993 sm_dcCache.DeleteContents(FALSE);
1994 }
1995
1996 // Clean up cache at app exit
1997 class wxDCModule : public wxModule
1998 {
1999 public:
2000 virtual bool OnInit() { return TRUE; }
2001 virtual void OnExit() { wxDC::ClearCache(); }
2002
2003 private:
2004 DECLARE_DYNAMIC_CLASS(wxDCModule)
2005 };
2006
2007 IMPLEMENT_DYNAMIC_CLASS(wxDCModule, wxModule)
2008
2009 #endif
2010 // wxUSE_DC_CACHEING
2011
wxWidgets (Impactor)