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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 | |
41 | WX_DEFINE_FLAGS( wxChoiceStyle ) | |
42 | ||
43 | wxBEGIN_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 | ||
71 | wxEND_FLAGS( wxChoiceStyle ) | |
72 | ||
73 | IMPLEMENT_DYNAMIC_CLASS_XTI(wxChoice, wxControlWithItems,"wx/choice.h") | |
74 | ||
75 | wxBEGIN_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 | |
82 | wxEND_PROPERTIES_TABLE() | |
83 | ||
84 | wxBEGIN_HANDLERS_TABLE(wxChoice) | |
85 | wxEND_HANDLERS_TABLE() | |
86 | ||
87 | wxCONSTRUCTOR_4( wxChoice , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size ) | |
88 | #else | |
89 | IMPLEMENT_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 | ||
106 | bool 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 | ||
127 | bool 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 | ||
161 | bool 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 | ||
175 | bool 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 | ||
192 | WXDWORD 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 | ||
212 | wxChoice::~wxChoice() | |
213 | { | |
214 | Clear(); | |
215 | } | |
216 | ||
217 | // ---------------------------------------------------------------------------- | |
218 | // adding/deleting items to/from the list | |
219 | // ---------------------------------------------------------------------------- | |
220 | ||
221 | int 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 | ||
260 | void 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 | ||
272 | void 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 | ||
286 | int 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 | ||
297 | int wxChoice::GetCurrentSelection() const | |
298 | { | |
299 | return (int)SendMessage(GetHwnd(), CB_GETCURSEL, 0, 0); | |
300 | } | |
301 | ||
302 | void wxChoice::SetSelection(int n) | |
303 | { | |
304 | SendMessage(GetHwnd(), CB_SETCURSEL, n, 0); | |
305 | } | |
306 | ||
307 | // ---------------------------------------------------------------------------- | |
308 | // string list functions | |
309 | // ---------------------------------------------------------------------------- | |
310 | ||
311 | unsigned int wxChoice::GetCount() const | |
312 | { | |
313 | return (unsigned int)SendMessage(GetHwnd(), CB_GETCOUNT, 0, 0); | |
314 | } | |
315 | ||
316 | int 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 | ||
359 | void 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 | ||
386 | wxString 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 | ||
412 | void 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 | ||
421 | void* 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 | ||
439 | void wxChoice::UpdateVisibleHeight() | |
440 | { | |
441 | // be careful to not change the width here | |
442 | DoSetSize(wxDefaultCoord, wxDefaultCoord, wxDefaultCoord, GetSize().y, wxSIZE_USE_EXISTING); | |
443 | } | |
444 | ||
445 | void 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 | ||
463 | void 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 | ||
472 | void 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 | ||
588 | wxSize 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 | ||
614 | WXLRESULT 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 | ||
653 | bool 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 | ||
747 | WXHBRUSH 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__) |