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