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1/////////////////////////////////////////////////////////////////////////////
2// Name: src/msw/choice.cpp
3// Purpose: wxChoice
4// Author: Julian Smart
5// Modified by: Vadim Zeitlin to derive from wxChoiceBase
6// Created: 04/01/98
7// RCS-ID: $Id$
8// Copyright: (c) Julian Smart
9// Licence: wxWindows licence
10/////////////////////////////////////////////////////////////////////////////
11
12// ============================================================================
13// declarations
14// ============================================================================
15
16// ----------------------------------------------------------------------------
17// headers
18// ----------------------------------------------------------------------------
19
20// For compilers that support precompilation, includes "wx.h".
21#include "wx/wxprec.h"
22
23#ifdef __BORLANDC__
24 #pragma hdrstop
25#endif
26
27#if wxUSE_CHOICE && !(defined(__SMARTPHONE__) && defined(__WXWINCE__))
28
29#include "wx/choice.h"
30
31#ifndef WX_PRECOMP
32 #include "wx/utils.h"
33 #include "wx/log.h"
34 #include "wx/brush.h"
35 #include "wx/settings.h"
36#endif
37
38#include "wx/msw/private.h"
39
40#if wxUSE_EXTENDED_RTTI
41WX_DEFINE_FLAGS( wxChoiceStyle )
42
43wxBEGIN_FLAGS( wxChoiceStyle )
44 // new style border flags, we put them first to
45 // use them for streaming out
46 wxFLAGS_MEMBER(wxBORDER_SIMPLE)
47 wxFLAGS_MEMBER(wxBORDER_SUNKEN)
48 wxFLAGS_MEMBER(wxBORDER_DOUBLE)
49 wxFLAGS_MEMBER(wxBORDER_RAISED)
50 wxFLAGS_MEMBER(wxBORDER_STATIC)
51 wxFLAGS_MEMBER(wxBORDER_NONE)
52
53 // old style border flags
54 wxFLAGS_MEMBER(wxSIMPLE_BORDER)
55 wxFLAGS_MEMBER(wxSUNKEN_BORDER)
56 wxFLAGS_MEMBER(wxDOUBLE_BORDER)
57 wxFLAGS_MEMBER(wxRAISED_BORDER)
58 wxFLAGS_MEMBER(wxSTATIC_BORDER)
59 wxFLAGS_MEMBER(wxBORDER)
60
61 // standard window styles
62 wxFLAGS_MEMBER(wxTAB_TRAVERSAL)
63 wxFLAGS_MEMBER(wxCLIP_CHILDREN)
64 wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW)
65 wxFLAGS_MEMBER(wxWANTS_CHARS)
66 wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE)
67 wxFLAGS_MEMBER(wxALWAYS_SHOW_SB )
68 wxFLAGS_MEMBER(wxVSCROLL)
69 wxFLAGS_MEMBER(wxHSCROLL)
70
71wxEND_FLAGS( wxChoiceStyle )
72
73IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControlWithItems,"wx/choice.h")
74
75wxBEGIN_PROPERTIES_TABLE(wxChoice)
76 wxEVENT_PROPERTY( Select , wxEVT_COMMAND_CHOICE_SELECTED , wxCommandEvent )
77
78 wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
79 wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
80 wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group"))
81 wxPROPERTY_FLAGS( WindowStyle , wxChoiceStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style
82wxEND_PROPERTIES_TABLE()
83
84wxBEGIN_HANDLERS_TABLE(wxChoice)
85wxEND_HANDLERS_TABLE()
86
87wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size )
88#else
89IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)
90#endif
91/*
92 TODO PROPERTIES
93 selection (long)
94 content (list)
95 item
96*/
97
98// ============================================================================
99// implementation
100// ============================================================================
101
102// ----------------------------------------------------------------------------
103// creation
104// ----------------------------------------------------------------------------
105
106bool wxChoice::Create(wxWindow *parent,
107 wxWindowID id,
108 const wxPoint& pos,
109 const wxSize& size,
110 int n, const wxString choices[],
111 long style,
112 const wxValidator& validator,
113 const wxString& name)
114{
115 // Experience shows that wxChoice vs. wxComboBox distinction confuses
116 // quite a few people - try to help them
117 wxASSERT_MSG( !(style & wxCB_DROPDOWN) &&
118 !(style & wxCB_READONLY) &&
119 !(style & wxCB_SIMPLE),
120 _T("this style flag is ignored by wxChoice, you ")
121 _T("probably want to use a wxComboBox") );
122
123 return CreateAndInit(parent, id, pos, size, n, choices, style,
124 validator, name);
125}
126
127bool wxChoice::CreateAndInit(wxWindow *parent,
128 wxWindowID id,
129 const wxPoint& pos,
130 const wxSize& size,
131 int n, const wxString choices[],
132 long style,
133 const wxValidator& validator,
134 const wxString& name)
135{
136 // initialize wxControl
137 if ( !CreateControl(parent, id, pos, size, style, validator, name) )
138 return false;
139
140 // now create the real HWND
141 if ( !MSWCreateControl(wxT("COMBOBOX"), wxEmptyString, pos, size) )
142 return false;
143
144
145 // choice/combobox normally has "white" (depends on colour scheme, of
146 // course) background rather than inheriting the parent's background
147 SetBackgroundColour(wxSystemSettings::GetColour(wxSYS_COLOUR_WINDOW));
148
149 // initialize the controls contents
150 for ( int i = 0; i < n; i++ )
151 {
152 Append(choices[i]);
153 }
154
155 // and now we may finally size the control properly (if needed)
156 SetInitialSize(size);
157
158 return true;
159}
160
161bool wxChoice::Create(wxWindow *parent,
162 wxWindowID id,
163 const wxPoint& pos,
164 const wxSize& size,
165 const wxArrayString& choices,
166 long style,
167 const wxValidator& validator,
168 const wxString& name)
169{
170 wxCArrayString chs(choices);
171 return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
172 style, validator, name);
173}
174
175bool wxChoice::MSWShouldPreProcessMessage(WXMSG *pMsg)
176{
177 MSG *msg = (MSG *) pMsg;
178
179 // if the dropdown list is visible, don't preprocess certain keys
180 if ( msg->message == WM_KEYDOWN
181 && (msg->wParam == VK_ESCAPE || msg->wParam == VK_RETURN) )
182 {
183 if (::SendMessage(GetHwndOf(this), CB_GETDROPPEDSTATE, 0, 0))
184 {
185 return false;
186 }
187 }
188
189 return wxControl::MSWShouldPreProcessMessage(pMsg);
190}
191
192WXDWORD wxChoice::MSWGetStyle(long style, WXDWORD *exstyle) const
193{
194 // we never have an external border
195 WXDWORD msStyle = wxControl::MSWGetStyle
196 (
197 (style & ~wxBORDER_MASK) | wxBORDER_NONE, exstyle
198 );
199
200 // WS_CLIPSIBLINGS is useful with wxChoice and doesn't seem to result in
201 // any problems
202 msStyle |= WS_CLIPSIBLINGS;
203
204 // wxChoice-specific styles
205 msStyle |= CBS_DROPDOWNLIST | WS_HSCROLL | WS_VSCROLL;
206 if ( style & wxCB_SORT )
207 msStyle |= CBS_SORT;
208
209 return msStyle;
210}
211
212wxChoice::~wxChoice()
213{
214 Clear();
215}
216
217// ----------------------------------------------------------------------------
218// adding/deleting items to/from the list
219// ----------------------------------------------------------------------------
220
221int wxChoice::DoInsertItems(const wxArrayStringsAdapter& items,
222 unsigned int pos,
223 void **clientData, wxClientDataType type)
224{
225 MSWAllocStorage(items, CB_INITSTORAGE);
226
227 const bool append = pos == GetCount();
228
229 // use CB_ADDSTRING when appending at the end to make sure the control is
230 // resorted if it has wxCB_SORT style
231 const unsigned msg = append ? CB_ADDSTRING : CB_INSERTSTRING;
232
233 if ( append )
234 pos = 0;
235
236 int n = wxNOT_FOUND;
237 const unsigned numItems = items.GetCount();
238 for ( unsigned i = 0; i < numItems; ++i )
239 {
240 n = MSWInsertOrAppendItem(pos, items[i], msg);
241 if ( n == wxNOT_FOUND )
242 return n;
243
244 if ( !append )
245 pos++;
246
247 AssignNewItemClientData(n, clientData, i, type);
248 }
249
250 // we need to refresh our size in order to have enough space for the
251 // newly added items
252 if ( !IsFrozen() )
253 UpdateVisibleHeight();
254
255 InvalidateBestSize();
256
257 return n;
258}
259
260void wxChoice::DoDeleteOneItem(unsigned int n)
261{
262 wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::Delete") );
263
264 SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
265
266 if ( !IsFrozen() )
267 UpdateVisibleHeight();
268
269 InvalidateBestSize();
270}
271
272void wxChoice::DoClear()
273{
274 SendMessage(GetHwnd(), CB_RESETCONTENT, 0, 0);
275
276 if ( !IsFrozen() )
277 UpdateVisibleHeight();
278
279 InvalidateBestSize();
280}
281
282// ----------------------------------------------------------------------------
283// selection
284// ----------------------------------------------------------------------------
285
286int wxChoice::GetSelection() const
287{
288 // if m_lastAcceptedSelection is set, it means that the dropdown is
289 // currently shown and that we want to use the last "permanent" selection
290 // instead of whatever is under the mouse pointer currently
291 //
292 // otherwise, get the selection from the control
293 return m_lastAcceptedSelection == wxID_NONE ? GetCurrentSelection()
294 : m_lastAcceptedSelection;
295}
296
297int wxChoice::GetCurrentSelection() const
298{
299 return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0);
300}
301
302void wxChoice::SetSelection(int n)
303{
304 SendMessage(GetHwnd(), CB_SETCURSEL, n, 0);
305}
306
307// ----------------------------------------------------------------------------
308// string list functions
309// ----------------------------------------------------------------------------
310
311unsigned int wxChoice::GetCount() const
312{
313 return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0);
314}
315
316int wxChoice::FindString(const wxString& s, bool bCase) const
317{
318#if defined(__WATCOMC__) && defined(__WIN386__)
319 // For some reason, Watcom in WIN386 mode crashes in the CB_FINDSTRINGEXACT message.
320 // wxChoice::Do it the long way instead.
321 unsigned int count = GetCount();
322 for ( unsigned int i = 0; i < count; i++ )
323 {
324 // as CB_FINDSTRINGEXACT is case insensitive, be case insensitive too
325 if (GetString(i).IsSameAs(s, bCase))
326 return i;
327 }
328
329 return wxNOT_FOUND;
330#else // !Watcom
331 //TODO: Evidently some MSW versions (all?) don't like empty strings
332 //passed to SendMessage, so we have to do it ourselves in that case
333 if ( s.empty() )
334 {
335 unsigned int count = GetCount();
336 for ( unsigned int i = 0; i < count; i++ )
337 {
338 if (GetString(i).empty())
339 return i;
340 }
341
342 return wxNOT_FOUND;
343 }
344 else if (bCase)
345 {
346 // back to base class search for not native search type
347 return wxItemContainerImmutable::FindString( s, bCase );
348 }
349 else
350 {
351 int pos = (int)SendMessage(GetHwnd(), CB_FINDSTRINGEXACT,
352 (WPARAM)-1, (LPARAM)s.wx_str());
353
354 return pos == LB_ERR ? wxNOT_FOUND : pos;
355 }
356#endif // Watcom/!Watcom
357}
358
359void wxChoice::SetString(unsigned int n, const wxString& s)
360{
361 wxCHECK_RET( IsValid(n), wxT("invalid item index in wxChoice::SetString") );
362
363 // we have to delete and add back the string as there is no way to change a
364 // string in place
365
366 // we need to preserve the client data manually
367 void *oldData = NULL;
368 wxClientData *oldObjData = NULL;
369 if ( HasClientUntypedData() )
370 oldData = GetClientData(n);
371 else if ( HasClientObjectData() )
372 oldObjData = GetClientObject(n);
373
374 ::SendMessage(GetHwnd(), CB_DELETESTRING, n, 0);
375 ::SendMessage(GetHwnd(), CB_INSERTSTRING, n, (LPARAM)s.wx_str() );
376
377 // restore the client data
378 if ( oldData )
379 SetClientData(n, oldData);
380 else if ( oldObjData )
381 SetClientObject(n, oldObjData);
382
383 InvalidateBestSize();
384}
385
386wxString wxChoice::GetString(unsigned int n) const
387{
388 int len = (int)::SendMessage(GetHwnd(), CB_GETLBTEXTLEN, n, 0);
389
390 wxString str;
391 if ( len != CB_ERR && len > 0 )
392 {
393 if ( ::SendMessage
394 (
395 GetHwnd(),
396 CB_GETLBTEXT,
397 n,
398 (LPARAM)(wxChar *)wxStringBuffer(str, len)
399 ) == CB_ERR )
400 {
401 wxLogLastError(wxT("SendMessage(CB_GETLBTEXT)"));
402 }
403 }
404
405 return str;
406}
407
408// ----------------------------------------------------------------------------
409// client data
410// ----------------------------------------------------------------------------
411
412void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
413{
414 if ( ::SendMessage(GetHwnd(), CB_SETITEMDATA,
415 n, (LPARAM)clientData) == CB_ERR )
416 {
417 wxLogLastError(wxT("CB_SETITEMDATA"));
418 }
419}
420
421void* wxChoice::DoGetItemClientData(unsigned int n) const
422{
423 LPARAM rc = SendMessage(GetHwnd(), CB_GETITEMDATA, n, 0);
424 if ( rc == CB_ERR )
425 {
426 wxLogLastError(wxT("CB_GETITEMDATA"));
427
428 // unfortunately, there is no way to return an error code to the user
429 rc = (LPARAM) NULL;
430 }
431
432 return (void *)rc;
433}
434
435// ----------------------------------------------------------------------------
436// wxMSW specific helpers
437// ----------------------------------------------------------------------------
438
439void wxChoice::UpdateVisibleHeight()
440{
441 // be careful to not change the width here
442 DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING);
443}
444
445void wxChoice::DoMoveWindow(int x, int y, int width, int height)
446{
447 // here is why this is necessary: if the width is negative, the combobox
448 // window proc makes the window of the size width*height instead of
449 // interpreting height in the usual manner (meaning the height of the drop
450 // down list - usually the height specified in the call to MoveWindow()
451 // will not change the height of combo box per se)
452 //
453 // this behaviour is not documented anywhere, but this is just how it is
454 // here (NT 4.4) and, anyhow, the check shouldn't hurt - however without
455 // the check, constraints/sizers using combos may break the height
456 // constraint will have not at all the same value as expected
457 if ( width < 0 )
458 return;
459
460 wxControl::DoMoveWindow(x, y, width, height);
461}
462
463void wxChoice::DoGetSize(int *w, int *h) const
464{
465 // this is weird: sometimes, the height returned by Windows is clearly the
466 // total height of the control including the drop down list -- but only
467 // sometimes, and normally it isn't... I have no idea about what to do with
468 // this
469 wxControl::DoGetSize(w, h);
470}
471
472void wxChoice::DoSetSize(int x, int y,
473 int width, int height,
474 int sizeFlags)
475{
476 int heightOrig = height;
477
478 // the height which we must pass to Windows should be the total height of
479 // the control including the drop down list while the height given to us
480 // is, of course, just the height of the permanently visible part of it
481 if ( height != wxDefaultCoord )
482 {
483 // don't make the drop down list too tall, arbitrarily limit it to 40
484 // items max and also don't leave it empty
485 size_t nItems = GetCount();
486 if ( !nItems )
487 nItems = 9;
488 else if ( nItems > 24 )
489 nItems = 24;
490
491 // add space for the drop down list
492 const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
493 height += hItem*(nItems + 1);
494 }
495 else
496 {
497 // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
498 // wxGetWindowRect() to determine the current height of the combobox,
499 // and then again sets the combobox's height to that value. Unfortunately,
500 // wxGetWindowRect doesn't include the dropdown list's height (at least
501 // on Win2K), so this would result in a combobox with dropdown height of
502 // 1 pixel. We have to determine the default height ourselves and call
503 // wxControl with that value instead.
504 int w, h;
505 RECT r;
506 DoGetSize(&w, &h);
507 if (::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r) != 0)
508 {
509 height = h + r.bottom - r.top;
510 }
511 }
512
513 wxControl::DoSetSize(x, y, width, height, sizeFlags);
514
515 // If we're storing a pending size, make sure we store
516 // the original size for reporting back to the app.
517 if (m_pendingSize != wxDefaultSize)
518 m_pendingSize = wxSize(width, heightOrig);
519
520 // This solution works on XP, but causes choice/combobox lists to be
521 // too short on W2K and earlier.
522#if 0
523 int widthCurrent, heightCurrent;
524 DoGetSize(&widthCurrent, &heightCurrent);
525
526 // the height which we must pass to Windows should be the total height of
527 // the control including the drop down list while the height given to us
528 // is, of course, just the height of the permanently visible part of it
529 if ( height != wxDefaultCoord && height != heightCurrent )
530 {
531 // don't make the drop down list too tall, arbitrarily limit it to 40
532 // items max and also don't leave it empty
533 unsigned int nItems = GetCount();
534 if ( !nItems )
535 nItems = 9;
536 else if ( nItems > 24 )
537 nItems = 24;
538
539 // add space for the drop down list
540 const int hItem = SendMessage(GetHwnd(), CB_GETITEMHEIGHT, 0, 0);
541 height += hItem*(nItems + 1);
542 }
543 else // keep the same height as now
544 {
545 // normally wxWindow::DoSetSize() checks if we set the same size as the
546 // window already has and does nothing in this case, but for us the
547 // check fails as the size we pass to it includes the dropdown while
548 // the size returned by our GetSize() does not, so test if the size
549 // didn't really change ourselves here
550 if ( width == wxDefaultCoord || width == widthCurrent )
551 {
552 // size doesn't change, what about position?
553 int xCurrent, yCurrent;
554 DoGetPosition(&xCurrent, &yCurrent);
555 const bool defMeansUnchanged = !(sizeFlags & wxSIZE_ALLOW_MINUS_ONE);
556 if ( ((x == wxDefaultCoord && defMeansUnchanged) || x == xCurrent)
557 &&
558 ((y == wxDefaultCoord && defMeansUnchanged) || y == yCurrent) )
559 {
560 // nothing changes, nothing to do
561 return;
562 }
563 }
564
565 // We cannot pass wxDefaultCoord as height to wxControl. wxControl uses
566 // wxGetWindowRect() to determine the current height of the combobox,
567 // and then again sets the combobox's height to that value. Unfortunately,
568 // wxGetWindowRect doesn't include the dropdown list's height (at least
569 // on Win2K), so this would result in a combobox with dropdown height of
570 // 1 pixel. We have to determine the default height ourselves and call
571 // wxControl with that value instead.
572 //
573 // Also notice that sometimes CB_GETDROPPEDCONTROLRECT seems to return
574 // wildly incorrect values (~32000) which looks like a bug in it, just
575 // ignore them in this case
576 RECT r;
577 if ( ::SendMessage(GetHwnd(), CB_GETDROPPEDCONTROLRECT, 0, (LPARAM) &r)
578 && r.bottom < 30000 )
579 {
580 height = heightCurrent + r.bottom - r.top;
581 }
582 }
583
584 wxControl::DoSetSize(x, y, width, height, sizeFlags);
585#endif
586}
587
588wxSize wxChoice::DoGetBestSize() const
589{
590 // find the widest string
591 int wChoice = 0;
592 const unsigned int nItems = GetCount();
593 for ( unsigned int i = 0; i < nItems; i++ )
594 {
595 int wLine;
596 GetTextExtent(GetString(i), &wLine, NULL);
597 if ( wLine > wChoice )
598 wChoice = wLine;
599 }
600
601 // give it some reasonable default value if there are no strings in the
602 // list
603 if ( wChoice == 0 )
604 wChoice = 100;
605
606 // the combobox should be slightly larger than the widest string
607 wChoice += 5*GetCharWidth();
608
609 wxSize best(wChoice, EDIT_HEIGHT_FROM_CHAR_HEIGHT(GetCharHeight()));
610 CacheBestSize(best);
611 return best;
612}
613
614WXLRESULT wxChoice::MSWWindowProc(WXUINT nMsg, WXWPARAM wParam, WXLPARAM lParam)
615{
616 switch ( nMsg )
617 {
618 case WM_LBUTTONUP:
619 {
620 int x = (int)LOWORD(lParam);
621 int y = (int)HIWORD(lParam);
622
623 // Ok, this is truly weird, but if a panel with a wxChoice
624 // loses the focus, then you get a *fake* WM_LBUTTONUP message
625 // with x = 65535 and y = 65535. Filter out this nonsense.
626 //
627 // VZ: I'd like to know how to reproduce this please...
628 if ( x == 65535 && y == 65535 )
629 return 0;
630 }
631 break;
632
633 // we have to handle both: one for the normal case and the other
634 // for readonly
635 case WM_CTLCOLOREDIT:
636 case WM_CTLCOLORLISTBOX:
637 case WM_CTLCOLORSTATIC:
638 {
639 WXHDC hdc;
640 WXHWND hwnd;
641 UnpackCtlColor(wParam, lParam, &hdc, &hwnd);
642
643 WXHBRUSH hbr = MSWControlColor((WXHDC)hdc, hwnd);
644 if ( hbr )
645 return (WXLRESULT)hbr;
646 //else: fall through to default window proc
647 }
648 }
649
650 return wxWindow::MSWWindowProc(nMsg, wParam, lParam);
651}
652
653bool wxChoice::MSWCommand(WXUINT param, WXWORD WXUNUSED(id))
654{
655 /*
656 The native control provides a great variety in the events it sends in
657 the different selection scenarios (undoubtedly for greater amusement of
658 the programmers using it). For the reference, here are the cases when
659 the final selection is accepted (things are quite interesting when it
660 is cancelled too):
661
662 A. Selecting with just the arrows without opening the dropdown:
663 1. CBN_SELENDOK
664 2. CBN_SELCHANGE
665
666 B. Opening dropdown with F4 and selecting with arrows:
667 1. CBN_DROPDOWN
668 2. many CBN_SELCHANGE while changing selection in the list
669 3. CBN_SELENDOK
670 4. CBN_CLOSEUP
671
672 C. Selecting with the mouse:
673 1. CBN_DROPDOWN
674 -- no intermediate CBN_SELCHANGEs --
675 2. CBN_SELENDOK
676 3. CBN_CLOSEUP
677 4. CBN_SELCHANGE
678
679 Admire the different order of messages in all of those cases, it must
680 surely have taken a lot of effort to Microsoft developers to achieve
681 such originality.
682 */
683 switch ( param )
684 {
685 case CBN_DROPDOWN:
686 // we use this value both because we don't want to track selection
687 // using CB_GETCURSEL while the dropdown is opened and because we
688 // need to reset the selection back to it if it's eventually
689 // cancelled by user
690 m_lastAcceptedSelection = GetCurrentSelection();
691 if ( m_lastAcceptedSelection == -1 )
692 {
693 // no current selection so no need to restore it later (this
694 // happens when opening a combobox containing text not from its
695 // list of items and we shouldn't erase this text)
696 m_lastAcceptedSelection = wxID_NONE;
697 }
698 break;
699
700 case CBN_CLOSEUP:
701 // if the selection was accepted by the user, it should have been
702 // reset to wxID_NONE by CBN_SELENDOK, otherwise the selection was
703 // cancelled and we must restore the old one
704 if ( m_lastAcceptedSelection != wxID_NONE )
705 {
706 SetSelection(m_lastAcceptedSelection);
707 m_lastAcceptedSelection = wxID_NONE;
708 }
709 break;
710
711 case CBN_SELENDOK:
712 // reset it to prevent CBN_CLOSEUP from undoing the selection (it's
713 // ok to reset it now as GetCurrentSelection() will now return the
714 // same thing anyhow)
715 m_lastAcceptedSelection = wxID_NONE;
716
717 {
718 const int n = GetSelection();
719
720 wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, m_windowId);
721 event.SetInt(n);
722 event.SetEventObject(this);
723
724 if ( n > -1 )
725 {
726 event.SetString(GetStringSelection());
727 InitCommandEventWithItems(event, n);
728 }
729
730 ProcessCommand(event);
731 }
732 break;
733
734 // don't handle CBN_SELENDCANCEL: just leave m_lastAcceptedSelection
735 // valid and the selection will be undone in CBN_CLOSEUP above
736
737 // don't handle CBN_SELCHANGE neither, we don't want to generate events
738 // while the dropdown is opened -- but do add it if we ever need this
739
740 default:
741 return false;
742 }
743
744 return true;
745}
746
747WXHBRUSH wxChoice::MSWControlColor(WXHDC hDC, WXHWND hWnd)
748{
749 if ( !IsEnabled() )
750 return MSWControlColorDisabled(hDC);
751
752 return wxChoiceBase::MSWControlColor(hDC, hWnd);
753}
754
755#endif // wxUSE_CHOICE && !(__SMARTPHONE__ && __WXWINCE__)