/[pcsx2_0.9.7]/trunk/3rdparty/wxWidgets/src/generic/splitter.cpp
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Revision 31 - (show annotations) (download)
Tue Sep 7 03:24:11 2010 UTC (10 years, 1 month ago) by william
File size: 29500 byte(s)
committing r3113 initial commit again...
1 /////////////////////////////////////////////////////////////////////////////
2 // Name: src/generic/splitter.cpp
3 // Purpose: wxSplitterWindow implementation
4 // Author: Julian Smart
5 // Modified by:
6 // Created: 01/02/97
7 // RCS-ID: $Id: splitter.cpp 59341 2009-03-05 15:44:24Z JS $
8 // Copyright: (c) Julian Smart
9 // Licence: wxWindows licence
10 /////////////////////////////////////////////////////////////////////////////
11
12 // For compilers that support precompilation, includes "wx.h".
13 #include "wx/wxprec.h"
14
15 #ifdef __BORLANDC__
16 #pragma hdrstop
17 #endif
18
19 #if wxUSE_SPLITTER
20
21 #include "wx/splitter.h"
22
23 #ifndef WX_PRECOMP
24 #include "wx/string.h"
25 #include "wx/utils.h"
26 #include "wx/log.h"
27
28 #include "wx/dcclient.h"
29 #include "wx/dcscreen.h"
30
31 #include "wx/window.h"
32 #include "wx/dialog.h"
33 #include "wx/frame.h"
34
35 #include "wx/settings.h"
36 #endif
37
38 #include "wx/renderer.h"
39
40 #include <stdlib.h>
41
42 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED)
43 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING)
44 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED)
45 DEFINE_EVENT_TYPE(wxEVT_COMMAND_SPLITTER_UNSPLIT)
46
47 IMPLEMENT_DYNAMIC_CLASS(wxSplitterWindow, wxWindow)
48
49 /*
50 TODO PROPERTIES
51 style wxSP_3D
52 sashpos (long , 0 )
53 minsize (long -1 )
54 object, object_ref
55 orientation
56 */
57
58 IMPLEMENT_DYNAMIC_CLASS(wxSplitterEvent, wxNotifyEvent)
59
60 BEGIN_EVENT_TABLE(wxSplitterWindow, wxWindow)
61 EVT_PAINT(wxSplitterWindow::OnPaint)
62 EVT_SIZE(wxSplitterWindow::OnSize)
63 EVT_MOUSE_EVENTS(wxSplitterWindow::OnMouseEvent)
64
65 #if defined( __WXMSW__ ) || defined( __WXMAC__)
66 EVT_SET_CURSOR(wxSplitterWindow::OnSetCursor)
67 #endif // wxMSW
68
69 WX_EVENT_TABLE_CONTROL_CONTAINER(wxSplitterWindow)
70 END_EVENT_TABLE()
71
72 WX_DELEGATE_TO_CONTROL_CONTAINER(wxSplitterWindow, wxWindow)
73
74 bool wxSplitterWindow::Create(wxWindow *parent, wxWindowID id,
75 const wxPoint& pos,
76 const wxSize& size,
77 long style,
78 const wxString& name)
79 {
80 // allow TABbing from one window to the other
81 style |= wxTAB_TRAVERSAL;
82
83 // we draw our border ourselves to blend the sash with it
84 style &= ~wxBORDER_MASK;
85 style |= wxBORDER_NONE;
86
87 #if defined(__WXMAC__) && wxMAC_USE_CORE_GRAPHICS
88 // CoreGraphics can't paint sash feedback
89 style |= wxSP_LIVE_UPDATE;
90 #endif
91
92 if ( !wxWindow::Create(parent, id, pos, size, style, name) )
93 return false;
94
95 if (size.x >= 0)
96 m_lastSize.x = size.x;
97 if (size.y >= 0)
98 m_lastSize.y = size.y;
99
100 m_permitUnsplitAlways = (style & wxSP_PERMIT_UNSPLIT) != 0;
101
102 // FIXME: with this line the background is not erased at all under GTK1,
103 // so temporary avoid it there
104 #if !defined(__WXGTK__) || defined(__WXGTK20__)
105 // don't erase the splitter background, it's pointless as we overwrite it
106 // anyhow
107 SetBackgroundStyle(wxBG_STYLE_CUSTOM);
108 #endif
109
110 return true;
111 }
112
113 void wxSplitterWindow::Init()
114 {
115 m_container.SetContainerWindow(this);
116
117 m_splitMode = wxSPLIT_VERTICAL;
118 m_permitUnsplitAlways = true;
119 m_windowOne = (wxWindow *) NULL;
120 m_windowTwo = (wxWindow *) NULL;
121 m_dragMode = wxSPLIT_DRAG_NONE;
122 m_oldX = 0;
123 m_oldY = 0;
124 m_firstX = 0;
125 m_firstY = 0;
126 m_sashPosition = m_requestedSashPosition = 0;
127 m_sashGravity = 0.0;
128 m_sashSize = -1; // -1 means use the native sash size
129 m_lastSize = wxSize(0,0);
130 m_checkRequestedSashPosition = false;
131 m_minimumPaneSize = 0;
132 m_sashCursorWE = wxCursor(wxCURSOR_SIZEWE);
133 m_sashCursorNS = wxCursor(wxCURSOR_SIZENS);
134 m_sashTrackerPen = new wxPen(*wxBLACK, 2, wxSOLID);
135
136 m_needUpdating = false;
137 m_isHot = false;
138 }
139
140 wxSplitterWindow::~wxSplitterWindow()
141 {
142 delete m_sashTrackerPen;
143 }
144
145 // ----------------------------------------------------------------------------
146 // entering/leaving sash
147 // ----------------------------------------------------------------------------
148
149 void wxSplitterWindow::RedrawIfHotSensitive(bool isHot)
150 {
151 if ( wxRendererNative::Get().GetSplitterParams(this).isHotSensitive )
152 {
153 m_isHot = isHot;
154
155 wxClientDC dc(this);
156 DrawSash(dc);
157 }
158 //else: we don't change our appearance, don't redraw to avoid flicker
159 }
160
161 void wxSplitterWindow::OnEnterSash()
162 {
163 SetResizeCursor();
164
165 RedrawIfHotSensitive(true);
166 }
167
168 void wxSplitterWindow::OnLeaveSash()
169 {
170 SetCursor(*wxSTANDARD_CURSOR);
171
172 RedrawIfHotSensitive(false);
173 }
174
175 void wxSplitterWindow::SetResizeCursor()
176 {
177 SetCursor(m_splitMode == wxSPLIT_VERTICAL ? m_sashCursorWE
178 : m_sashCursorNS);
179 }
180
181 // ----------------------------------------------------------------------------
182 // other event handlers
183 // ----------------------------------------------------------------------------
184
185 void wxSplitterWindow::OnPaint(wxPaintEvent& WXUNUSED(event))
186 {
187 wxPaintDC dc(this);
188
189 DrawSash(dc);
190 }
191
192 void wxSplitterWindow::OnInternalIdle()
193 {
194 wxWindow::OnInternalIdle();
195
196 // if this is the first idle time after a sash position has potentially
197 // been set, allow SizeWindows to check for a requested size.
198 if (!m_checkRequestedSashPosition)
199 {
200 m_checkRequestedSashPosition = true;
201 SizeWindows();
202 return; // it won't needUpdating in this case
203 }
204
205 if (m_needUpdating)
206 SizeWindows();
207 }
208
209 void wxSplitterWindow::OnMouseEvent(wxMouseEvent& event)
210 {
211 int x = (int)event.GetX(),
212 y = (int)event.GetY();
213
214 if ( GetWindowStyle() & wxSP_NOSASH )
215 {
216 event.Skip();
217 return;
218 }
219
220 // with wxSP_LIVE_UPDATE style the splitter windows are always resized
221 // following the mouse movement while it drags the sash, without it we only
222 // draw the sash at the new position but only resize the windows when the
223 // dragging is finished
224 #if defined( __WXMAC__ ) && defined(TARGET_API_MAC_OSX) && TARGET_API_MAC_OSX == 1
225 bool isLive = true ; // FIXME: why?
226 #else
227 bool isLive = HasFlag(wxSP_LIVE_UPDATE);
228 #endif
229 if (event.LeftDown())
230 {
231 if ( SashHitTest(x, y) )
232 {
233 // Start the drag now
234 m_dragMode = wxSPLIT_DRAG_DRAGGING;
235
236 // Capture mouse and set the cursor
237 CaptureMouse();
238 SetResizeCursor();
239
240 if ( !isLive )
241 {
242 // remember the initial sash position and draw the initial
243 // shadow sash
244 m_sashPositionCurrent = m_sashPosition;
245
246 DrawSashTracker(x, y);
247 }
248
249 m_oldX = x;
250 m_oldY = y;
251
252 SetResizeCursor();
253 return;
254 }
255 }
256 else if (event.LeftUp() && m_dragMode == wxSPLIT_DRAG_DRAGGING)
257 {
258 // We can stop dragging now and see what we've got.
259 m_dragMode = wxSPLIT_DRAG_NONE;
260
261 // Release mouse and unset the cursor
262 ReleaseMouse();
263 SetCursor(* wxSTANDARD_CURSOR);
264
265 // exit if unsplit after doubleclick
266 if ( !IsSplit() )
267 {
268 return;
269 }
270
271 // Erase old tracker
272 if ( !isLive )
273 {
274 DrawSashTracker(m_oldX, m_oldY);
275 }
276
277 // the position of the click doesn't exactly correspond to
278 // m_sashPosition, rather it changes it by the distance by which the
279 // mouse has moved
280 int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
281
282 int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
283 int posSashNew = OnSashPositionChanging(posSashOld + diff);
284 if ( posSashNew == -1 )
285 {
286 // change not allowed
287 return;
288 }
289
290 if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
291 {
292 // Deal with possible unsplit scenarios
293 if ( posSashNew == 0 )
294 {
295 // We remove the first window from the view
296 wxWindow *removedWindow = m_windowOne;
297 m_windowOne = m_windowTwo;
298 m_windowTwo = (wxWindow *) NULL;
299 OnUnsplit(removedWindow);
300 wxSplitterEvent eventUnsplit(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
301 eventUnsplit.m_data.win = removedWindow;
302 (void)DoSendEvent(eventUnsplit);
303 SetSashPositionAndNotify(0);
304 }
305 else if ( posSashNew == GetWindowSize() )
306 {
307 // We remove the second window from the view
308 wxWindow *removedWindow = m_windowTwo;
309 m_windowTwo = (wxWindow *) NULL;
310 OnUnsplit(removedWindow);
311 wxSplitterEvent eventUnsplit(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
312 eventUnsplit.m_data.win = removedWindow;
313 (void)DoSendEvent(eventUnsplit);
314 SetSashPositionAndNotify(0);
315 }
316 else
317 {
318 SetSashPositionAndNotify(posSashNew);
319 }
320 }
321 else
322 {
323 SetSashPositionAndNotify(posSashNew);
324 }
325
326 SizeWindows();
327 } // left up && dragging
328 else if ((event.Moving() || event.Leaving() || event.Entering()) && (m_dragMode == wxSPLIT_DRAG_NONE))
329 {
330 if ( event.Leaving() || !SashHitTest(x, y) )
331 OnLeaveSash();
332 else
333 OnEnterSash();
334 }
335 else if (event.Dragging() && (m_dragMode == wxSPLIT_DRAG_DRAGGING))
336 {
337 int diff = m_splitMode == wxSPLIT_VERTICAL ? x - m_oldX : y - m_oldY;
338 if ( !diff )
339 {
340 // nothing to do, mouse didn't really move far enough
341 return;
342 }
343
344 int posSashOld = isLive ? m_sashPosition : m_sashPositionCurrent;
345 int posSashNew = OnSashPositionChanging(posSashOld + diff);
346 if ( posSashNew == -1 )
347 {
348 // change not allowed
349 return;
350 }
351
352 if ( posSashNew == m_sashPosition )
353 return;
354
355 // Erase old tracker
356 if ( !isLive )
357 {
358 DrawSashTracker(m_oldX, m_oldY);
359 }
360
361 if (m_splitMode == wxSPLIT_VERTICAL)
362 x = posSashNew;
363 else
364 y = posSashNew;
365
366 // Remember old positions
367 m_oldX = x;
368 m_oldY = y;
369
370 #ifdef __WXMSW__
371 // As we captured the mouse, we may get the mouse events from outside
372 // our window - for example, negative values in x, y. This has a weird
373 // consequence under MSW where we use unsigned values sometimes and
374 // signed ones other times: the coordinates turn as big positive
375 // numbers and so the sash is drawn on the *right* side of the window
376 // instead of the left (or bottom instead of top). Correct this.
377 if ( (short)m_oldX < 0 )
378 m_oldX = 0;
379 if ( (short)m_oldY < 0 )
380 m_oldY = 0;
381 #endif // __WXMSW__
382
383 // Draw new one
384 if ( !isLive )
385 {
386 m_sashPositionCurrent = posSashNew;
387
388 DrawSashTracker(m_oldX, m_oldY);
389 }
390 else
391 {
392 DoSetSashPosition(posSashNew);
393 m_needUpdating = true;
394 }
395 }
396 else if ( event.LeftDClick() && m_windowTwo )
397 {
398 OnDoubleClickSash(x, y);
399 }
400 else
401 {
402 event.Skip();
403 }
404 }
405
406 void wxSplitterWindow::OnSize(wxSizeEvent& event)
407 {
408 // only process this message if we're not iconized - otherwise iconizing
409 // and restoring a window containing the splitter has a funny side effect
410 // of changing the splitter position!
411 wxWindow *parent = wxGetTopLevelParent(this);
412 bool iconized;
413
414 wxTopLevelWindow *winTop = wxDynamicCast(parent, wxTopLevelWindow);
415 if ( winTop )
416 {
417 iconized = winTop->IsIconized();
418 }
419 else
420 {
421 wxFAIL_MSG(wxT("should have a top level parent!"));
422
423 iconized = false;
424 }
425
426 if ( iconized )
427 {
428 m_lastSize = wxSize(0,0);
429
430 event.Skip();
431
432 return;
433 }
434
435 if ( m_windowTwo )
436 {
437 int w, h;
438 GetClientSize(&w, &h);
439
440 int size = m_splitMode == wxSPLIT_VERTICAL ? w : h;
441
442 int old_size = m_splitMode == wxSPLIT_VERTICAL ? m_lastSize.x : m_lastSize.y;
443 if ( old_size != 0 )
444 {
445 int delta = (int) ( (size - old_size)*m_sashGravity );
446 if ( delta != 0 )
447 {
448 int newPosition = m_sashPosition + delta;
449 if( newPosition < m_minimumPaneSize )
450 newPosition = m_minimumPaneSize;
451 SetSashPositionAndNotify(newPosition);
452 }
453 }
454
455 if ( m_sashPosition >= size - 5 )
456 SetSashPositionAndNotify(wxMax(10, size - 40));
457 m_lastSize = wxSize(w,h);
458 }
459
460 SizeWindows();
461 }
462
463 void wxSplitterWindow::SetSashGravity(double gravity)
464 {
465 wxCHECK_RET( gravity >= 0. && gravity <= 1.,
466 _T("invalid gravity value") );
467
468 m_sashGravity = gravity;
469 }
470
471 bool wxSplitterWindow::SashHitTest(int x, int y, int tolerance)
472 {
473 if ( m_windowTwo == NULL || m_sashPosition == 0)
474 return false; // No sash
475
476 int z = m_splitMode == wxSPLIT_VERTICAL ? x : y;
477 int hitMin = m_sashPosition - tolerance;
478 int hitMax = m_sashPosition + GetSashSize() + tolerance;
479
480 return z >= hitMin && z <= hitMax;
481 }
482
483 int wxSplitterWindow::GetSashSize() const
484 {
485 return m_sashSize > -1 ? m_sashSize : wxRendererNative::Get().GetSplitterParams(this).widthSash;
486 }
487
488 int wxSplitterWindow::GetBorderSize() const
489 {
490 return wxRendererNative::Get().GetSplitterParams(this).border;
491 }
492
493 // Draw the sash
494 void wxSplitterWindow::DrawSash(wxDC& dc)
495 {
496 if (HasFlag(wxSP_3DBORDER))
497 wxRendererNative::Get().DrawSplitterBorder
498 (
499 this,
500 dc,
501 GetClientRect()
502 );
503
504 // don't draw sash if we're not split
505 if ( m_sashPosition == 0 || !m_windowTwo )
506 return;
507
508 // nor if we're configured to not show it
509 if ( HasFlag(wxSP_NOSASH) )
510 return;
511
512 wxRendererNative::Get().DrawSplitterSash
513 (
514 this,
515 dc,
516 GetClientSize(),
517 m_sashPosition,
518 m_splitMode == wxSPLIT_VERTICAL ? wxVERTICAL
519 : wxHORIZONTAL,
520 m_isHot ? (int)wxCONTROL_CURRENT : 0
521 );
522 }
523
524 // Draw the sash tracker (for whilst moving the sash)
525 void wxSplitterWindow::DrawSashTracker(int x, int y)
526 {
527 int w, h;
528 GetClientSize(&w, &h);
529
530 wxScreenDC screenDC;
531 int x1, y1;
532 int x2, y2;
533
534 if ( m_splitMode == wxSPLIT_VERTICAL )
535 {
536 x1 = x; y1 = 2;
537 x2 = x; y2 = h-2;
538
539 if ( x1 > w )
540 {
541 x1 = w; x2 = w;
542 }
543 else if ( x1 < 0 )
544 {
545 x1 = 0; x2 = 0;
546 }
547 }
548 else
549 {
550 x1 = 2; y1 = y;
551 x2 = w-2; y2 = y;
552
553 if ( y1 > h )
554 {
555 y1 = h;
556 y2 = h;
557 }
558 else if ( y1 < 0 )
559 {
560 y1 = 0;
561 y2 = 0;
562 }
563 }
564
565 ClientToScreen(&x1, &y1);
566 ClientToScreen(&x2, &y2);
567
568 screenDC.SetLogicalFunction(wxINVERT);
569 screenDC.SetPen(*m_sashTrackerPen);
570 screenDC.SetBrush(*wxTRANSPARENT_BRUSH);
571
572 screenDC.DrawLine(x1, y1, x2, y2);
573
574 screenDC.SetLogicalFunction(wxCOPY);
575 }
576
577 int wxSplitterWindow::GetWindowSize() const
578 {
579 wxSize size = GetClientSize();
580
581 return m_splitMode == wxSPLIT_VERTICAL ? size.x : size.y;
582 }
583
584 int wxSplitterWindow::AdjustSashPosition(int sashPos) const
585 {
586 wxWindow *win;
587
588 win = GetWindow1();
589 if ( win )
590 {
591 // the window shouldn't be smaller than its own minimal size nor
592 // smaller than the minimual pane size specified for this splitter
593 int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
594 : win->GetMinHeight();
595
596 if ( minSize == -1 || m_minimumPaneSize > minSize )
597 minSize = m_minimumPaneSize;
598
599 minSize += GetBorderSize();
600
601 if ( sashPos < minSize )
602 sashPos = minSize;
603 }
604
605 win = GetWindow2();
606 if ( win )
607 {
608 int minSize = m_splitMode == wxSPLIT_VERTICAL ? win->GetMinWidth()
609 : win->GetMinHeight();
610
611 if ( minSize == -1 || m_minimumPaneSize > minSize )
612 minSize = m_minimumPaneSize;
613
614 int maxSize = GetWindowSize() - minSize - GetBorderSize() - GetSashSize();
615 if ( maxSize > 0 && sashPos > maxSize && maxSize >= m_minimumPaneSize)
616 sashPos = maxSize;
617 }
618
619 return sashPos;
620 }
621
622 bool wxSplitterWindow::DoSetSashPosition(int sashPos)
623 {
624 int newSashPosition = AdjustSashPosition(sashPos);
625
626 if ( newSashPosition == m_sashPosition )
627 return false;
628
629 m_sashPosition = newSashPosition;
630
631 return true;
632 }
633
634 void wxSplitterWindow::SetSashPositionAndNotify(int sashPos)
635 {
636 // we must reset the request here, otherwise the sash would be stuck at
637 // old position if the user attempted to move the sash after invalid
638 // (e.g. smaller than minsize) sash position was requested using
639 // SetSashPosition():
640 m_requestedSashPosition = INT_MAX;
641
642 // note that we must send the event in any case, i.e. even if the sash
643 // position hasn't changed and DoSetSashPosition() returns false because we
644 // must generate a CHANGED event at the end of resizing
645 DoSetSashPosition(sashPos);
646
647 wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGED, this);
648 event.m_data.pos = m_sashPosition;
649
650 (void)DoSendEvent(event);
651 }
652
653 // Position and size subwindows.
654 // Note that the border size applies to each subwindow, not
655 // including the edges next to the sash.
656 void wxSplitterWindow::SizeWindows()
657 {
658 // check if we have delayed setting the real sash position
659 if ( m_checkRequestedSashPosition && m_requestedSashPosition != INT_MAX )
660 {
661 int newSashPosition = ConvertSashPosition(m_requestedSashPosition);
662 if ( newSashPosition != m_sashPosition )
663 {
664 DoSetSashPosition(newSashPosition);
665 }
666
667 if ( newSashPosition <= m_sashPosition
668 && newSashPosition >= m_sashPosition - GetBorderSize() )
669 {
670 // don't update it any more
671 m_requestedSashPosition = INT_MAX;
672 }
673 }
674
675 int w, h;
676 GetClientSize(&w, &h);
677
678 if ( GetWindow1() && !GetWindow2() )
679 {
680 GetWindow1()->SetSize(GetBorderSize(), GetBorderSize(),
681 w - 2*GetBorderSize(), h - 2*GetBorderSize());
682 }
683 else if ( GetWindow1() && GetWindow2() )
684 {
685 const int border = GetBorderSize(),
686 sash = GetSashSize();
687
688 int size1 = GetSashPosition() - border,
689 size2 = GetSashPosition() + sash;
690
691 int x2, y2, w1, h1, w2, h2;
692 if ( GetSplitMode() == wxSPLIT_VERTICAL )
693 {
694 w1 = size1;
695 w2 = w - 2*border - sash - w1;
696 if (w2 < 0)
697 w2 = 0;
698 h2 = h - 2*border;
699 if (h2 < 0)
700 h2 = 0;
701 h1 = h2;
702 x2 = size2;
703 y2 = border;
704 }
705 else // horz splitter
706 {
707 w2 = w - 2*border;
708 if (w2 < 0)
709 w2 = 0;
710 w1 = w2;
711 h1 = size1;
712 h2 = h - 2*border - sash - h1;
713 if (h2 < 0)
714 h2 = 0;
715 x2 = border;
716 y2 = size2;
717 }
718
719 GetWindow2()->SetSize(x2, y2, w2, h2);
720 GetWindow1()->SetSize(border, border, w1, h1);
721 }
722
723 wxClientDC dc(this);
724 DrawSash(dc);
725
726 SetNeedUpdating(false);
727 }
728
729 // Set pane for unsplit window
730 void wxSplitterWindow::Initialize(wxWindow *window)
731 {
732 wxASSERT_MSG( (!window || (window && window->GetParent() == this)),
733 _T("windows in the splitter should have it as parent!") );
734
735 if (window && !window->IsShown())
736 window->Show();
737
738 m_windowOne = window;
739 m_windowTwo = (wxWindow *) NULL;
740 DoSetSashPosition(0);
741 }
742
743 // Associates the given window with window 2, drawing the appropriate sash
744 // and changing the split mode.
745 // Does nothing and returns false if the window is already split.
746 bool wxSplitterWindow::DoSplit(wxSplitMode mode,
747 wxWindow *window1, wxWindow *window2,
748 int sashPosition)
749 {
750 if ( IsSplit() )
751 return false;
752
753 wxCHECK_MSG( window1 && window2, false,
754 _T("can not split with NULL window(s)") );
755
756 wxCHECK_MSG( window1->GetParent() == this && window2->GetParent() == this, false,
757 _T("windows in the splitter should have it as parent!") );
758
759 if (! window1->IsShown())
760 window1->Show();
761 if (! window2->IsShown())
762 window2->Show();
763
764 m_splitMode = mode;
765 m_windowOne = window1;
766 m_windowTwo = window2;
767
768 // remember the sash position we want to set for later if we can't set it
769 // right now (e.g. because the window is too small)
770 m_requestedSashPosition = sashPosition;
771 m_checkRequestedSashPosition = false;
772
773 DoSetSashPosition(ConvertSashPosition(sashPosition));
774
775 SizeWindows();
776
777 return true;
778 }
779
780 int wxSplitterWindow::ConvertSashPosition(int sashPosition) const
781 {
782 if ( sashPosition > 0 )
783 {
784 return sashPosition;
785 }
786 else if ( sashPosition < 0 )
787 {
788 // It's negative so adding is subtracting
789 return GetWindowSize() + sashPosition;
790 }
791 else // sashPosition == 0
792 {
793 // default, put it in the centre
794 return GetWindowSize() / 2;
795 }
796 }
797
798 // Remove the specified (or second) window from the view
799 // Doesn't actually delete the window.
800 bool wxSplitterWindow::Unsplit(wxWindow *toRemove)
801 {
802 if ( ! IsSplit() )
803 return false;
804
805 wxWindow *win;
806 if ( toRemove == NULL || toRemove == m_windowTwo)
807 {
808 win = m_windowTwo ;
809 m_windowTwo = (wxWindow *) NULL;
810 }
811 else if ( toRemove == m_windowOne )
812 {
813 win = m_windowOne ;
814 m_windowOne = m_windowTwo;
815 m_windowTwo = (wxWindow *) NULL;
816 }
817 else
818 {
819 wxFAIL_MSG(wxT("splitter: attempt to remove a non-existent window"));
820
821 return false;
822 }
823
824 OnUnsplit(win);
825 DoSetSashPosition(0);
826 SizeWindows();
827
828 return true;
829 }
830
831 // Replace a window with another one
832 bool wxSplitterWindow::ReplaceWindow(wxWindow *winOld, wxWindow *winNew)
833 {
834 wxCHECK_MSG( winOld, false, wxT("use one of Split() functions instead") );
835 wxCHECK_MSG( winNew, false, wxT("use Unsplit() functions instead") );
836
837 if ( winOld == m_windowTwo )
838 {
839 m_windowTwo = winNew;
840 }
841 else if ( winOld == m_windowOne )
842 {
843 m_windowOne = winNew;
844 }
845 else
846 {
847 wxFAIL_MSG(wxT("splitter: attempt to replace a non-existent window"));
848
849 return false;
850 }
851
852 SizeWindows();
853
854 return true;
855 }
856
857 void wxSplitterWindow::SetMinimumPaneSize(int min)
858 {
859 m_minimumPaneSize = min;
860 int pos = m_requestedSashPosition != INT_MAX ? m_requestedSashPosition : m_sashPosition;
861 SetSashPosition(pos); // re-check limits
862 }
863
864 void wxSplitterWindow::SetSashPosition(int position, bool redraw)
865 {
866 // remember the sash position we want to set for later if we can't set it
867 // right now (e.g. because the window is too small)
868 m_requestedSashPosition = position;
869 m_checkRequestedSashPosition = false;
870
871 DoSetSashPosition(ConvertSashPosition(position));
872
873 if ( redraw )
874 {
875 SizeWindows();
876 }
877 }
878
879 // Make sure the child window sizes are updated. This is useful
880 // for reducing flicker by updating the sizes before a
881 // window is shown, if you know the overall size is correct.
882 void wxSplitterWindow::UpdateSize()
883 {
884 m_checkRequestedSashPosition = true;
885 SizeWindows();
886 m_checkRequestedSashPosition = false;
887 }
888
889 bool wxSplitterWindow::DoSendEvent(wxSplitterEvent& event)
890 {
891 return !GetEventHandler()->ProcessEvent(event) || event.IsAllowed();
892 }
893
894 wxSize wxSplitterWindow::DoGetBestSize() const
895 {
896 // get best sizes of subwindows
897 wxSize size1, size2;
898 if ( m_windowOne )
899 size1 = m_windowOne->GetEffectiveMinSize();
900 if ( m_windowTwo )
901 size2 = m_windowTwo->GetEffectiveMinSize();
902
903 // sum them
904 //
905 // pSash points to the size component to which sash size must be added
906 int *pSash;
907 wxSize sizeBest;
908 if ( m_splitMode == wxSPLIT_VERTICAL )
909 {
910 sizeBest.y = wxMax(size1.y, size2.y);
911 sizeBest.x = wxMax(size1.x, m_minimumPaneSize) +
912 wxMax(size2.x, m_minimumPaneSize);
913
914 pSash = &sizeBest.x;
915 }
916 else // wxSPLIT_HORIZONTAL
917 {
918 sizeBest.x = wxMax(size1.x, size2.x);
919 sizeBest.y = wxMax(size1.y, m_minimumPaneSize) +
920 wxMax(size2.y, m_minimumPaneSize);
921
922 pSash = &sizeBest.y;
923 }
924
925 // account for the border and the sash
926 int border = 2*GetBorderSize();
927 *pSash += GetSashSize();
928 sizeBest.x += border;
929 sizeBest.y += border;
930
931 return sizeBest;
932 }
933
934 // ---------------------------------------------------------------------------
935 // wxSplitterWindow virtual functions: they now just generate the events
936 // ---------------------------------------------------------------------------
937
938 bool wxSplitterWindow::OnSashPositionChange(int WXUNUSED(newSashPosition))
939 {
940 // always allow by default
941 return true;
942 }
943
944 int wxSplitterWindow::OnSashPositionChanging(int newSashPosition)
945 {
946 // If within UNSPLIT_THRESHOLD from edge, set to edge to cause closure.
947 const int UNSPLIT_THRESHOLD = 4;
948
949 // first of all, check if OnSashPositionChange() doesn't forbid this change
950 if ( !OnSashPositionChange(newSashPosition) )
951 {
952 // it does
953 return -1;
954 }
955
956 // Obtain relevant window dimension for bottom / right threshold check
957 int window_size = GetWindowSize();
958
959 bool unsplit_scenario = false;
960 if ( m_permitUnsplitAlways || m_minimumPaneSize == 0 )
961 {
962 // Do edge detection if unsplit premitted
963 if ( newSashPosition <= UNSPLIT_THRESHOLD )
964 {
965 // threshold top / left check
966 newSashPosition = 0;
967 unsplit_scenario = true;
968 }
969 if ( newSashPosition >= window_size - UNSPLIT_THRESHOLD )
970 {
971 // threshold bottom/right check
972 newSashPosition = window_size;
973 unsplit_scenario = true;
974 }
975 }
976
977 if ( !unsplit_scenario )
978 {
979 // If resultant pane would be too small, enlarge it
980 newSashPosition = AdjustSashPosition(newSashPosition);
981 }
982
983 // If the result is out of bounds it means minimum size is too big,
984 // so split window in half as best compromise.
985 if ( newSashPosition < 0 || newSashPosition > window_size )
986 newSashPosition = window_size / 2;
987
988 // now let the event handler have it
989 //
990 // FIXME: shouldn't we do it before the adjustments above so as to ensure
991 // that the sash position is always reasonable?
992 wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_SASH_POS_CHANGING, this);
993 event.m_data.pos = newSashPosition;
994
995 if ( !DoSendEvent(event) )
996 {
997 // the event handler vetoed the change
998 newSashPosition = -1;
999 }
1000 else
1001 {
1002 // it could have been changed by it
1003 newSashPosition = event.GetSashPosition();
1004 }
1005
1006 return newSashPosition;
1007 }
1008
1009 // Called when the sash is double-clicked. The default behaviour is to remove
1010 // the sash if the minimum pane size is zero.
1011 void wxSplitterWindow::OnDoubleClickSash(int x, int y)
1012 {
1013 wxCHECK_RET(m_windowTwo, wxT("splitter: no window to remove"));
1014
1015 // new code should handle events instead of using the virtual functions
1016 wxSplitterEvent event(wxEVT_COMMAND_SPLITTER_DOUBLECLICKED, this);
1017 event.m_data.pt.x = x;
1018 event.m_data.pt.y = y;
1019 if ( DoSendEvent(event) )
1020 {
1021 if ( GetMinimumPaneSize() == 0 || m_permitUnsplitAlways )
1022 {
1023 wxWindow* win = m_windowTwo;
1024 if ( Unsplit(win) )
1025 {
1026 wxSplitterEvent unsplitEvent(wxEVT_COMMAND_SPLITTER_UNSPLIT, this);
1027 unsplitEvent.m_data.win = win;
1028 (void)DoSendEvent(unsplitEvent);
1029 }
1030 }
1031 }
1032 //else: blocked by user
1033 }
1034
1035 void wxSplitterWindow::OnUnsplit(wxWindow *winRemoved)
1036 {
1037 // call this before calling the event handler which may delete the window
1038 winRemoved->Show(false);
1039 }
1040
1041 #if defined( __WXMSW__ ) || defined( __WXMAC__)
1042
1043 // this is currently called (and needed) under MSW only...
1044 void wxSplitterWindow::OnSetCursor(wxSetCursorEvent& event)
1045 {
1046 // if we don't do it, the resizing cursor might be set for child window:
1047 // and like this we explicitly say that our cursor should not be used for
1048 // children windows which overlap us
1049
1050 if ( SashHitTest(event.GetX(), event.GetY(), 0) )
1051 {
1052 // default processing is ok
1053 event.Skip();
1054 }
1055 //else: do nothing, in particular, don't call Skip()
1056 }
1057
1058 #endif // wxMSW || wxMac
1059
1060 #endif // wxUSE_SPLITTER
1061

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