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(Flickery) fix for droppings when there are no notebook pages
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1/////////////////////////////////////////////////////////////////////////////
2// File: region.cpp
3// Purpose: Region class
4// Author: David Webster
5// Modified by:
6// Created: 10/15/99
7// RCS-ID: $Id$
8// Copyright: (c) Davdi Webster
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12// For compilers that support precompilation, includes "wx.h".
13#include "wx/wxprec.h"
14
15#include "wx/app.h"
16#include "wx/os2/region.h"
17#include "wx/gdicmn.h"
18
19#include "wx/window.h"
20#include "wx/os2/private.h"
21
22 IMPLEMENT_DYNAMIC_CLASS(wxRegion, wxGDIObject)
23 IMPLEMENT_DYNAMIC_CLASS(wxRegionIterator, wxObject)
24
25//-----------------------------------------------------------------------------
26// wxRegionRefData implementation
27//-----------------------------------------------------------------------------
28
29class WXDLLEXPORT wxRegionRefData : public wxGDIRefData {
30public:
31 wxRegionRefData()
32 {
33 m_hRegion = 0;
34 m_hPS = 0;
35 }
36
37 wxRegionRefData(const wxRegionRefData& rData)
38 {
39 RGNRECT vRgnData;
40 PRECTL pRect = NULL;
41
42 vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
43 if (::GpiQueryRegionRects( rData.m_hPS // Pres space
44 ,rData.m_hRegion // Handle of region to query
45 ,NULL // Return all RECTs
46 ,&vRgnData // Will contain number or RECTs in region
47 ,NULL // NULL to return number of RECTs
48 ))
49 {
50 pRect = new RECTL[vRgnData.crcReturned];
51 vRgnData.crc = vRgnData.crcReturned;
52 vRgnData.ircStart = 1;
53 if (::GpiQueryRegionRects( rData.m_hPS // Pres space of source
54 ,rData.m_hRegion // Handle of source region
55 ,NULL // Return all RECTs
56 ,&vRgnData // Operations set to return rects
57 ,pRect // Will contain the actual RECTS
58 ))
59 {
60 m_hRegion = ::GpiCreateRegion( rData.m_hPS
61 ,vRgnData.crcReturned
62 ,pRect
63 );
64 m_hPS = rData.m_hPS;
65 }
66 delete [] pRect;
67 }
68 }
69
70 ~wxRegionRefData()
71 {
72 ::GpiDestroyRegion(m_hPS, m_hRegion);
73 }
74
75 HRGN m_hRegion;
76 HPS m_hPS;
77};
78
79#define M_REGION (((wxRegionRefData*)m_refData)->m_hRegion)
80#define M_REGION_OF(rgn) (((wxRegionRefData*)(rgn.m_refData))->m_hRegion)
81
82//-----------------------------------------------------------------------------
83// wxRegion
84//-----------------------------------------------------------------------------
85
86/*!
87 * Create an empty region.
88 */
89wxRegion::wxRegion()
90{
91 m_refData = new wxRegionRefData;
92} // end of wxRegion::wxRegion
93
94wxRegion::wxRegion(
95 WXHRGN hRegion,
96 WXHDC hPS
97)
98{
99 m_refData = new wxRegionRefData;
100 M_REGION = (HRGN) hRegion;
101 (((wxRegionRefData*)m_refData)->m_hPS) = hPS;
102} // end of wxRegion::wxRegion
103
104wxRegion::wxRegion(
105 wxCoord x
106, wxCoord y
107, wxCoord vWidth
108, wxCoord vHeight
109)
110{
111 RECTL vRect;
112 SIZEL vSize = {0, 0};
113 DEVOPENSTRUC vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
114 HDC hDC = ::DevOpenDC( vHabmain
115 ,OD_MEMORY
116 ,"*"
117 ,5L
118 ,(PDEVOPENDATA)&vDop
119 ,NULLHANDLE
120 );
121
122
123 vRect.xLeft = x;
124 vRect.xRight = x + vWidth;
125 vRect.yBottom = y;
126 vRect.yTop = y + vHeight;
127
128 m_refData = new wxRegionRefData;
129
130 //
131 // Need a PS to create a Region
132 //
133 ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
134 ,hDC
135 ,&vSize
136 ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
137 );
138 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
139 ,1
140 ,&vRect
141 );
142} // end of wxRegion::wxRegion
143
144wxRegion::wxRegion(
145 const wxPoint& rTopLeft
146, const wxPoint& rBottomRight
147)
148{
149 RECTL vRect;
150 SIZEL vSize = {0, 0};
151 DEVOPENSTRUC vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
152 HDC hDC = ::DevOpenDC( vHabmain
153 ,OD_MEMORY
154 ,"*"
155 ,5L
156 ,(PDEVOPENDATA)&vDop
157 ,NULLHANDLE
158 );
159
160 vRect.xLeft = rTopLeft.x;
161 vRect.xRight = rBottomRight.x;
162 vRect.yBottom = rBottomRight.y;
163 vRect.yTop = rTopLeft.y;
164
165 m_refData = new wxRegionRefData;
166
167 //
168 // Need a PS to create a Region
169 //
170 ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
171 ,hDC
172 ,&vSize
173 ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
174 );
175 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
176 ,1
177 ,&vRect
178 );
179} // end of wxRegion::wxRegion
180
181wxRegion::wxRegion(
182 const wxRect& rRect
183)
184{
185 RECTL vRect;
186 SIZEL vSize = {0, 0};
187 DEVOPENSTRUC vDop = {0L, "DISPLAY", NULL, 0L, 0L, 0L, 0L, 0L, 0L};
188 HDC hDC = ::DevOpenDC( vHabmain
189 ,OD_MEMORY
190 ,"*"
191 ,5L
192 ,(PDEVOPENDATA)&vDop
193 ,NULLHANDLE
194 );
195
196
197 vRect.xLeft = rRect.x;
198 vRect.xRight = rRect.x + rRect.width;
199 vRect.yBottom = rRect.y;
200 vRect.yTop = rRect.y + rRect.height;
201
202 m_refData = new wxRegionRefData;
203
204 //
205 // Need a PS to create a Region
206 //
207 ((wxRegionRefData*)m_refData)->m_hPS = ::GpiCreatePS( vHabmain
208 ,hDC
209 ,&vSize
210 ,PU_PELS | GPIT_MICRO | GPIA_ASSOC
211 );
212 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)m_refData)->m_hPS
213 ,1
214 ,&vRect
215 );
216} // end of wxRegion::wxRegion
217
218//
219// Destroy the region.
220//
221wxRegion::~wxRegion()
222{
223} // end of wxRegion::~wxRegion
224
225wxObjectRefData *wxRegion::CreateData() const
226{
227 return new wxRegionRefData;
228}
229
230wxObjectRefData *wxRegion::CloneData(const wxObjectRefData *data) const
231{
232 return new wxRegionRefData(*(wxRegionRefData *)data);
233}
234
235//-----------------------------------------------------------------------------
236//# Modify region
237//-----------------------------------------------------------------------------
238
239bool wxRegion::Offset(
240 wxCoord x
241, wxCoord y
242)
243{
244 if ( !x && !y )
245 {
246 // nothing to do
247 return TRUE;
248 }
249
250 AllocExclusive();
251
252#if 0
253 if ( ::OffsetRgn(GetHrgn(), x, y) == ERROR )
254 {
255 wxLogLastError(_T("OffsetRgn"));
256
257 return FALSE;
258 }
259#endif
260 return TRUE;
261}
262
263//
264// Clear current region
265//
266void wxRegion::Clear()
267{
268 UnRef();
269} // end of wxRegion::Clear
270
271//
272// Combine rectangle (x, y, w, h) with this.
273//
274bool wxRegion::Combine(
275 wxCoord x
276, wxCoord y
277, wxCoord vWidth
278, wxCoord vHeight
279, wxRegionOp eOp
280)
281{
282 return Combine(wxRegion(x, y, vWidth, vHeight), eOp);
283} // end of wxRegion::Combine
284
285//
286// Union region with this.
287//
288bool wxRegion::Combine(
289 const wxRegion& rRegion
290, wxRegionOp eOp
291)
292{
293 //
294 // We can't use the API functions if we don't have a valid region handle
295 //
296 if (!m_refData)
297 {
298 // combining with an empty/invalid region works differently depending
299 // on the operation
300 switch (eOp)
301 {
302 case wxRGN_COPY:
303 case wxRGN_OR:
304 case wxRGN_XOR:
305 *this = rRegion;
306 break;
307
308 default:
309 wxFAIL_MSG( _T("unknown region operation") );
310 // fall through
311
312 case wxRGN_AND:
313 case wxRGN_DIFF:
314 // leave empty/invalid
315 return FALSE;
316 }
317 }
318 else // we have a valid region
319 {
320
321 LONG lMode = 0;
322
323 switch (eOp)
324 {
325 case wxRGN_AND:
326 lMode = CRGN_AND;
327 break;
328
329 case wxRGN_OR:
330 lMode = CRGN_OR;
331 break;
332
333 case wxRGN_XOR:
334 lMode = CRGN_XOR;
335 break;
336
337 case wxRGN_DIFF:
338 lMode = CRGN_DIFF;
339 break;
340
341 case wxRGN_COPY:
342 default:
343 lMode = CRGN_COPY;
344 break;
345 }
346 return (::GpiCombineRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
347 ,M_REGION
348 ,M_REGION
349 ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion
350 ,lMode
351 ) != RGN_ERROR);
352 }
353 return TRUE;
354} // end of wxRegion::Combine
355
356bool wxRegion::Combine(
357 const wxRect& rRect
358, wxRegionOp eOp
359)
360{
361 return Combine( rRect.GetLeft()
362 ,rRect.GetTop()
363 ,rRect.GetWidth()
364 ,rRect.GetHeight()
365 ,eOp
366 );
367} // end of wxRegion::Combine
368
369//-----------------------------------------------------------------------------
370//# Information on region
371//-----------------------------------------------------------------------------
372
373//
374// Outer bounds of region
375//
376void wxRegion::GetBox(
377 wxCoord& x
378, wxCoord& y
379, wxCoord& vWidth
380, wxCoord& vHeight
381) const
382{
383 if (m_refData)
384 {
385 RECTL vRect;
386 APIRET rc;
387
388 rc = ::GpiQueryRegionBox( ((wxRegionRefData*)m_refData)->m_hPS
389 ,M_REGION
390 ,&vRect
391 );
392 x = vRect.xLeft;
393 y = vRect.yBottom;
394 vWidth = vRect.xRight - vRect.xLeft;
395 vHeight = vRect.yTop - vRect.yBottom;
396 }
397 else
398 {
399 x = y = vWidth = vHeight = 0L;
400 }
401} // end of wxRegion::GetBox
402
403wxRect wxRegion::GetBox() const
404{
405 wxCoord x, y, w, h;
406 GetBox(x, y, w, h);
407 return wxRect(x, y, w, h);
408}
409
410//
411// Is region empty?
412//
413bool wxRegion::Empty() const
414{
415 wxCoord x;
416 wxCoord y;
417 wxCoord vWidth;
418 wxCoord vHeight;
419
420 if (M_REGION == 0)
421 return TRUE;
422
423 GetBox( x
424 ,y
425 ,vWidth
426 ,vHeight
427 );
428 return ((vWidth == 0) && (vHeight == 0));
429} // end of wxRegion::Empty
430
431//-----------------------------------------------------------------------------
432// Tests
433//-----------------------------------------------------------------------------
434
435//
436// Does the region contain the point (x,y)?
437wxRegionContain wxRegion::Contains(
438 wxCoord x
439, wxCoord y
440) const
441{
442 POINTL vPoint;
443
444 vPoint.x = x;
445 vPoint.y = y;
446
447 if (!m_refData)
448 return wxOutRegion;
449
450 LONG lInside = ::GpiPtInRegion( ((wxRegionRefData*)m_refData)->m_hPS
451 ,M_REGION
452 ,&vPoint
453 );
454 if (lInside == PRGN_INSIDE)
455 return wxInRegion;
456 return wxOutRegion;
457} // end of wxRegion::Contains
458
459//
460// Does the region contain the point pt?
461//
462wxRegionContain wxRegion::Contains(
463 const wxPoint& rPoint
464) const
465{
466 POINTL vPoint = { rPoint.x, rPoint.y };
467
468 if (!m_refData)
469 return wxOutRegion;
470
471 LONG lInside = ::GpiPtInRegion( ((wxRegionRefData*)m_refData)->m_hPS
472 ,M_REGION
473 ,&vPoint
474 );
475 if (lInside == PRGN_INSIDE)
476 return wxInRegion;
477 else
478 return wxOutRegion;
479} // end of wxRegion::Contains
480
481//
482// Does the region contain the rectangle (x, y, w, h)?
483//
484wxRegionContain wxRegion::Contains(
485 wxCoord x
486, wxCoord y
487, wxCoord vWidth
488, wxCoord vHeight
489) const
490{
491 RECTL vRect;
492
493 if (!m_refData)
494 return wxOutRegion;
495
496 vRect.xLeft = x;
497 vRect.yTop = y;
498 vRect.xRight = x + vWidth;
499 vRect.yBottom = y + vHeight;
500
501 if (PRGN_INSIDE == ::GpiRectInRegion( ((wxRegionRefData*)m_refData)->m_hPS
502 ,M_REGION
503 ,&vRect
504 ))
505 return wxInRegion;
506 else
507 return wxOutRegion;
508} // end of wxRegion::Contains
509
510//
511// Does the region contain the rectangle rect
512//
513wxRegionContain wxRegion::Contains(
514 const wxRect& rRect
515) const
516{
517 if (!m_refData)
518 return wxOutRegion;
519
520 wxCoord x;
521 wxCoord y;
522 wxCoord vWidth;
523 wxCoord vHeight;
524
525 x = rRect.x;
526 y = rRect.y;
527 vWidth = rRect.GetWidth();
528 vHeight = rRect.GetHeight();
529 return Contains( x
530 ,y
531 ,vWidth
532 ,vHeight
533 );
534} // end of wxRegion::Contains
535
536//
537// Get internal region handle
538//
539WXHRGN wxRegion::GetHRGN() const
540{
541 if (!m_refData)
542 return (WXHRGN) 0;
543 return (WXHRGN) M_REGION;
544}
545
546//
547// Set a new PS, this means we have to recreate the old region in the new
548// PS
549//
550void wxRegion::SetPS(
551 HPS hPS
552)
553{
554 RGNRECT vRgnData;
555 PRECTL pRect = NULL;
556
557 vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
558 if (::GpiQueryRegionRects( ((wxRegionRefData*)m_refData)->m_hPS
559 ,((wxRegionRefData*)m_refData)->m_hRegion
560 ,NULL
561 ,&vRgnData
562 ,NULL
563 ))
564 {
565 pRect = new RECTL[vRgnData.crcReturned];
566 vRgnData.crc = vRgnData.crcReturned;
567 vRgnData.ircStart = 1;
568 if (::GpiQueryRegionRects( ((wxRegionRefData*)m_refData)->m_hPS
569 ,((wxRegionRefData*)m_refData)->m_hRegion
570 ,NULL
571 ,&vRgnData
572 ,pRect
573 ))
574 {
575 //
576 // First destroy the region out of the old PS
577 // and then create it in the new and set the new to current
578 //
579 ::GpiDestroyRegion( ((wxRegionRefData*)m_refData)->m_hPS
580 ,M_REGION
581 );
582 ((wxRegionRefData*)m_refData)->m_hRegion = ::GpiCreateRegion( hPS
583 ,vRgnData.crcReturned
584 ,pRect
585 );
586 ((wxRegionRefData*)m_refData)->m_hPS = hPS;
587 }
588 delete [] pRect;
589 }
590} // end of wxRegion::SetPS
591
592///////////////////////////////////////////////////////////////////////////////
593// //
594// wxRegionIterator //
595// //
596///////////////////////////////////////////////////////////////////////////////
597
598//
599// Initialize empty iterator
600//
601wxRegionIterator::wxRegionIterator()
602: m_lCurrent(0)
603, m_lNumRects(0)
604, m_pRects(NULL)
605{
606} // end of wxRegionIterator::wxRegionIterator
607
608wxRegionIterator::~wxRegionIterator()
609{
610 if (m_pRects)
611 delete[] m_pRects;
612} // end of wxRegionIterator::~wxRegionIterator
613
614//
615// Initialize iterator for region
616//
617wxRegionIterator::wxRegionIterator(
618 const wxRegion& rRegion
619)
620{
621 m_pRects = NULL;
622 Reset(rRegion);
623} // end of wxRegionIterator::wxRegionIterator
624
625//
626// Reset iterator for a new /e region.
627//
628void wxRegionIterator::Reset(
629 const wxRegion& rRegion
630)
631{
632 m_lCurrent = 0;
633 m_lNumRects = 0;
634 m_vRegion = rRegion;
635
636 if (m_pRects)
637 delete[] m_pRects;
638
639 m_pRects = NULL;
640
641 if (m_vRegion.Empty())
642 m_lNumRects = 0;
643 else
644 {
645 RGNRECT vRgnData;
646 PRECTL pRect;
647
648 vRgnData.ulDirection = RECTDIR_LFRT_TOPBOT;
649 if (::GpiQueryRegionRects( ((wxRegionRefData*)rRegion.m_refData)->m_hPS // Pres space
650 ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion // Handle of region to query
651 ,NULL // Return all RECTs
652 ,&vRgnData // Will contain number or RECTs in region
653 ,NULL // NULL to return number of RECTs
654 ))
655 {
656 pRect = new RECTL[vRgnData.crcReturned];
657 m_pRects = new wxRect[vRgnData.crcReturned];
658 vRgnData.crc = vRgnData.crcReturned;
659 m_lNumRects = vRgnData.crcReturned;
660 vRgnData.ircStart = 1;
661 if (::GpiQueryRegionRects( ((wxRegionRefData*)rRegion.m_refData)->m_hPS // Pres space of source
662 ,((wxRegionRefData*)rRegion.m_refData)->m_hRegion // Handle of source region
663 ,NULL // Return all RECTs
664 ,&vRgnData // Operations set to return rects
665 ,pRect // Will contain the actual RECTS
666 ))
667 {
668#if 0
669 M_REGION = ::GpiCreateRegion( ((wxRegionRefData*)rRegion.m_refData)->m_hPS
670 ,vRgnData.crcReturned
671 ,pRect
672 );
673#endif
674 for( LONG i = 0; i < m_lNumRects; i++)
675 {
676 m_pRects[i].x = pRect[i].xLeft;
677 m_pRects[i].width = pRect[i].xRight - pRect[i].xLeft;
678 m_pRects[i].y = pRect[i].yBottom;
679 m_pRects[i].height = pRect[i].yTop - pRect[i].yBottom;
680 }
681#if 0
682 ((wxRegionRefData*)m_refData)->m_hPS = ((wxRegionRefData*)rRegion.m_refData)->m_hPS;
683#endif
684 }
685 }
686 }
687} // end of wxRegionIterator::Reset
688
689//
690// Increment iterator. The rectangle returned is the one after the
691// incrementation.
692//
693void wxRegionIterator::operator++ ()
694{
695 if (m_lCurrent < m_lNumRects)
696 ++m_lCurrent;
697} // end of wxRegionIterator::operator ++
698
699//
700// Increment iterator. The rectangle returned is the one before the
701// incrementation.
702//
703void wxRegionIterator::operator++ (int)
704{
705 if (m_lCurrent < m_lNumRects)
706 ++m_lCurrent;
707} // end of wxRegionIterator::operator++
708
709wxCoord wxRegionIterator::GetX() const
710{
711 if (m_lCurrent < m_lNumRects)
712 return m_pRects[m_lCurrent].x;
713 return 0L;
714} // end of wxRegionIterator::GetX
715
716wxCoord wxRegionIterator::GetY() const
717{
718 if (m_lCurrent < m_lNumRects)
719 return m_pRects[m_lCurrent].y;
720 return 0L;
721} // end of wxRegionIterator::GetY
722
723wxCoord wxRegionIterator::GetW() const
724{
725 if (m_lCurrent < m_lNumRects)
726 return m_pRects[m_lCurrent].width ;
727 return 0L;
728} // end of wxRegionIterator::GetW
729
730wxCoord wxRegionIterator::GetH() const
731{
732 if (m_lCurrent < m_lNumRects)
733 return m_pRects[m_lCurrent].height;
734 return 0L;
735} // end of wxRegionIterator::GetH
736
wxWidgets (Impactor)