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1 | /////////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/msw/listbox.cpp | |
3 | // Purpose: wxListBox | |
4 | // Author: Julian Smart | |
5 | // Modified by: Vadim Zeitlin (owner drawn stuff) | |
6 | // Created: | |
7 | // RCS-ID: $Id$ | |
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_LISTBOX | |
20 | ||
21 | #include "wx/listbox.h" | |
22 | ||
23 | #ifndef WX_PRECOMP | |
24 | #include "wx/dynarray.h" | |
25 | #include "wx/settings.h" | |
26 | #include "wx/brush.h" | |
27 | #include "wx/font.h" | |
28 | #include "wx/dc.h" | |
29 | #include "wx/utils.h" | |
30 | #include "wx/log.h" | |
31 | #include "wx/window.h" | |
32 | #endif | |
33 | ||
34 | #include "wx/msw/private.h" | |
35 | ||
36 | #include <windowsx.h> | |
37 | ||
38 | #if wxUSE_OWNER_DRAWN | |
39 | #include "wx/ownerdrw.h" | |
40 | #endif | |
41 | ||
42 | #if wxUSE_EXTENDED_RTTI | |
43 | WX_DEFINE_FLAGS( wxListBoxStyle ) | |
44 | ||
45 | wxBEGIN_FLAGS( wxListBoxStyle ) | |
46 | // new style border flags, we put them first to | |
47 | // use them for streaming out | |
48 | wxFLAGS_MEMBER(wxBORDER_SIMPLE) | |
49 | wxFLAGS_MEMBER(wxBORDER_SUNKEN) | |
50 | wxFLAGS_MEMBER(wxBORDER_DOUBLE) | |
51 | wxFLAGS_MEMBER(wxBORDER_RAISED) | |
52 | wxFLAGS_MEMBER(wxBORDER_STATIC) | |
53 | wxFLAGS_MEMBER(wxBORDER_NONE) | |
54 | ||
55 | // old style border flags | |
56 | wxFLAGS_MEMBER(wxSIMPLE_BORDER) | |
57 | wxFLAGS_MEMBER(wxSUNKEN_BORDER) | |
58 | wxFLAGS_MEMBER(wxDOUBLE_BORDER) | |
59 | wxFLAGS_MEMBER(wxRAISED_BORDER) | |
60 | wxFLAGS_MEMBER(wxSTATIC_BORDER) | |
61 | wxFLAGS_MEMBER(wxBORDER) | |
62 | ||
63 | // standard window styles | |
64 | wxFLAGS_MEMBER(wxTAB_TRAVERSAL) | |
65 | wxFLAGS_MEMBER(wxCLIP_CHILDREN) | |
66 | wxFLAGS_MEMBER(wxTRANSPARENT_WINDOW) | |
67 | wxFLAGS_MEMBER(wxWANTS_CHARS) | |
68 | wxFLAGS_MEMBER(wxFULL_REPAINT_ON_RESIZE) | |
69 | wxFLAGS_MEMBER(wxALWAYS_SHOW_SB ) | |
70 | wxFLAGS_MEMBER(wxVSCROLL) | |
71 | wxFLAGS_MEMBER(wxHSCROLL) | |
72 | ||
73 | wxFLAGS_MEMBER(wxLB_SINGLE) | |
74 | wxFLAGS_MEMBER(wxLB_MULTIPLE) | |
75 | wxFLAGS_MEMBER(wxLB_EXTENDED) | |
76 | wxFLAGS_MEMBER(wxLB_HSCROLL) | |
77 | wxFLAGS_MEMBER(wxLB_ALWAYS_SB) | |
78 | wxFLAGS_MEMBER(wxLB_NEEDED_SB) | |
79 | wxFLAGS_MEMBER(wxLB_SORT) | |
80 | ||
81 | wxEND_FLAGS( wxListBoxStyle ) | |
82 | ||
83 | IMPLEMENT_DYNAMIC_CLASS_XTI(wxListBox, wxControl,"wx/listbox.h") | |
84 | ||
85 | wxBEGIN_PROPERTIES_TABLE(wxListBox) | |
86 | wxEVENT_PROPERTY( Select , wxEVT_COMMAND_LISTBOX_SELECTED , wxCommandEvent ) | |
87 | wxEVENT_PROPERTY( DoubleClick , wxEVT_COMMAND_LISTBOX_DOUBLECLICKED , wxCommandEvent ) | |
88 | ||
89 | wxPROPERTY( Font , wxFont , SetFont , GetFont , EMPTY_MACROVALUE, 0 /*flags*/ , wxT("Helpstring") , wxT("group")) | |
90 | wxPROPERTY_COLLECTION( Choices , wxArrayString , wxString , AppendString , GetStrings, 0 /*flags*/ , wxT("Helpstring") , wxT("group") ) | |
91 | wxPROPERTY( Selection ,int, SetSelection, GetSelection, EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group") ) | |
92 | wxPROPERTY_FLAGS( WindowStyle , wxListBoxStyle , long , SetWindowStyleFlag , GetWindowStyleFlag , EMPTY_MACROVALUE , 0 /*flags*/ , wxT("Helpstring") , wxT("group")) // style | |
93 | wxEND_PROPERTIES_TABLE() | |
94 | ||
95 | wxBEGIN_HANDLERS_TABLE(wxListBox) | |
96 | wxEND_HANDLERS_TABLE() | |
97 | ||
98 | wxCONSTRUCTOR_4( wxListBox , wxWindow* , Parent , wxWindowID , Id , wxPoint , Position , wxSize , Size ) | |
99 | #else | |
100 | IMPLEMENT_DYNAMIC_CLASS(wxListBox, wxControl) | |
101 | #endif | |
102 | ||
103 | /* | |
104 | TODO PROPERTIES | |
105 | selection | |
106 | content | |
107 | item | |
108 | */ | |
109 | ||
110 | // ============================================================================ | |
111 | // list box item declaration and implementation | |
112 | // ============================================================================ | |
113 | ||
114 | #if wxUSE_OWNER_DRAWN | |
115 | ||
116 | class wxListBoxItem : public wxOwnerDrawn | |
117 | { | |
118 | public: | |
119 | wxListBoxItem(const wxString& str = wxEmptyString); | |
120 | }; | |
121 | ||
122 | wxListBoxItem::wxListBoxItem(const wxString& str) : wxOwnerDrawn(str, false) | |
123 | { | |
124 | // no bitmaps/checkmarks | |
125 | SetMarginWidth(0); | |
126 | } | |
127 | ||
128 | wxOwnerDrawn *wxListBox::CreateLboxItem(size_t WXUNUSED(n)) | |
129 | { | |
130 | return new wxListBoxItem(); | |
131 | } | |
132 | ||
133 | #endif //USE_OWNER_DRAWN | |
134 | ||
135 | // ============================================================================ | |
136 | // list box control implementation | |
137 | // ============================================================================ | |
138 | ||
139 | // ---------------------------------------------------------------------------- | |
140 | // creation | |
141 | // ---------------------------------------------------------------------------- | |
142 | ||
143 | // Listbox item | |
144 | wxListBox::wxListBox() | |
145 | { | |
146 | m_noItems = 0; | |
147 | m_selected = 0; | |
148 | } | |
149 | ||
150 | bool wxListBox::Create(wxWindow *parent, | |
151 | wxWindowID id, | |
152 | const wxPoint& pos, | |
153 | const wxSize& size, | |
154 | int n, const wxString choices[], | |
155 | long style, | |
156 | const wxValidator& validator, | |
157 | const wxString& name) | |
158 | { | |
159 | m_noItems = 0; | |
160 | m_selected = 0; | |
161 | ||
162 | // initialize base class fields | |
163 | if ( !CreateControl(parent, id, pos, size, style, validator, name) ) | |
164 | return false; | |
165 | ||
166 | // create the native control | |
167 | if ( !MSWCreateControl(_T("LISTBOX"), wxEmptyString, pos, size) ) | |
168 | { | |
169 | // control creation failed | |
170 | return false; | |
171 | } | |
172 | ||
173 | // initialize the contents | |
174 | for ( int i = 0; i < n; i++ ) | |
175 | { | |
176 | Append(choices[i]); | |
177 | } | |
178 | ||
179 | // now we can compute our best size correctly, so do it if necessary | |
180 | SetBestSize(size); | |
181 | ||
182 | return true; | |
183 | } | |
184 | ||
185 | bool wxListBox::Create(wxWindow *parent, | |
186 | wxWindowID id, | |
187 | const wxPoint& pos, | |
188 | const wxSize& size, | |
189 | const wxArrayString& choices, | |
190 | long style, | |
191 | const wxValidator& validator, | |
192 | const wxString& name) | |
193 | { | |
194 | wxCArrayString chs(choices); | |
195 | return Create(parent, id, pos, size, chs.GetCount(), chs.GetStrings(), | |
196 | style, validator, name); | |
197 | } | |
198 | ||
199 | wxListBox::~wxListBox() | |
200 | { | |
201 | Free(); | |
202 | } | |
203 | ||
204 | WXDWORD wxListBox::MSWGetStyle(long style, WXDWORD *exstyle) const | |
205 | { | |
206 | WXDWORD msStyle = wxControl::MSWGetStyle(style, exstyle); | |
207 | ||
208 | // always show the vertical scrollbar if necessary -- otherwise it is | |
209 | // impossible to use the control with the mouse | |
210 | msStyle |= WS_VSCROLL; | |
211 | ||
212 | // we always want to get the notifications | |
213 | msStyle |= LBS_NOTIFY; | |
214 | ||
215 | // without this style, you get unexpected heights, so e.g. constraint | |
216 | // layout doesn't work properly | |
217 | msStyle |= LBS_NOINTEGRALHEIGHT; | |
218 | ||
219 | wxASSERT_MSG( !(style & wxLB_MULTIPLE) || !(style & wxLB_EXTENDED), | |
220 | _T("only one of listbox selection modes can be specified") ); | |
221 | ||
222 | if ( style & wxLB_MULTIPLE ) | |
223 | msStyle |= LBS_MULTIPLESEL; | |
224 | else if ( style & wxLB_EXTENDED ) | |
225 | msStyle |= LBS_EXTENDEDSEL; | |
226 | ||
227 | if ( m_windowStyle & wxLB_ALWAYS_SB ) | |
228 | msStyle |= LBS_DISABLENOSCROLL; | |
229 | if ( m_windowStyle & wxLB_HSCROLL ) | |
230 | msStyle |= WS_HSCROLL; | |
231 | if ( m_windowStyle & wxLB_SORT ) | |
232 | msStyle |= LBS_SORT; | |
233 | ||
234 | #if wxUSE_OWNER_DRAWN && !defined(__WXWINCE__) | |
235 | if ( m_windowStyle & wxLB_OWNERDRAW ) | |
236 | { | |
237 | // we don't support LBS_OWNERDRAWVARIABLE yet and we also always put | |
238 | // the strings in the listbox for simplicity even though we could have | |
239 | // avoided it in this case | |
240 | msStyle |= LBS_OWNERDRAWFIXED | LBS_HASSTRINGS; | |
241 | } | |
242 | #endif // wxUSE_OWNER_DRAWN | |
243 | ||
244 | return msStyle; | |
245 | } | |
246 | ||
247 | // ---------------------------------------------------------------------------- | |
248 | // implementation of wxListBoxBase methods | |
249 | // ---------------------------------------------------------------------------- | |
250 | ||
251 | void wxListBox::DoSetFirstItem(int N) | |
252 | { | |
253 | wxCHECK_RET( IsValid(N), | |
254 | wxT("invalid index in wxListBox::SetFirstItem") ); | |
255 | ||
256 | SendMessage(GetHwnd(), LB_SETTOPINDEX, (WPARAM)N, (LPARAM)0); | |
257 | } | |
258 | ||
259 | void wxListBox::Delete(unsigned int n) | |
260 | { | |
261 | wxCHECK_RET( IsValid(n), | |
262 | wxT("invalid index in wxListBox::Delete") ); | |
263 | ||
264 | // for owner drawn objects, the data is used for storing wxOwnerDrawn | |
265 | // pointers and we shouldn't touch it | |
266 | #if !wxUSE_OWNER_DRAWN | |
267 | if ( !(m_windowStyle & wxLB_OWNERDRAW) ) | |
268 | #endif // !wxUSE_OWNER_DRAWN | |
269 | if ( HasClientObjectData() ) | |
270 | { | |
271 | delete GetClientObject(n); | |
272 | } | |
273 | ||
274 | SendMessage(GetHwnd(), LB_DELETESTRING, n, 0); | |
275 | m_noItems--; | |
276 | ||
277 | SetHorizontalExtent(wxEmptyString); | |
278 | ||
279 | InvalidateBestSize(); | |
280 | } | |
281 | ||
282 | int wxListBox::DoAppend(const wxString& item) | |
283 | { | |
284 | int index = ListBox_AddString(GetHwnd(), item); | |
285 | m_noItems++; | |
286 | ||
287 | #if wxUSE_OWNER_DRAWN | |
288 | if ( m_windowStyle & wxLB_OWNERDRAW ) { | |
289 | wxOwnerDrawn *pNewItem = CreateLboxItem(index); // dummy argument | |
290 | pNewItem->SetName(item); | |
291 | m_aItems.Insert(pNewItem, index); | |
292 | ListBox_SetItemData(GetHwnd(), index, pNewItem); | |
293 | pNewItem->SetFont(GetFont()); | |
294 | } | |
295 | #endif // wxUSE_OWNER_DRAWN | |
296 | ||
297 | SetHorizontalExtent(item); | |
298 | ||
299 | InvalidateBestSize(); | |
300 | return index; | |
301 | } | |
302 | ||
303 | void wxListBox::DoSetItems(const wxArrayString& choices, void** clientData) | |
304 | { | |
305 | // avoid flicker - but don't need to do this for a hidden listbox | |
306 | bool hideAndShow = IsShown(); | |
307 | if ( hideAndShow ) | |
308 | { | |
309 | ShowWindow(GetHwnd(), SW_HIDE); | |
310 | } | |
311 | ||
312 | ListBox_ResetContent(GetHwnd()); | |
313 | ||
314 | m_noItems = choices.GetCount(); | |
315 | unsigned int i; | |
316 | for (i = 0; i < m_noItems; i++) | |
317 | { | |
318 | ListBox_AddString(GetHwnd(), choices[i]); | |
319 | if ( clientData ) | |
320 | { | |
321 | SetClientData(i, clientData[i]); | |
322 | } | |
323 | } | |
324 | ||
325 | #if wxUSE_OWNER_DRAWN | |
326 | if ( m_windowStyle & wxLB_OWNERDRAW ) { | |
327 | // first delete old items | |
328 | WX_CLEAR_ARRAY(m_aItems); | |
329 | ||
330 | // then create new ones | |
331 | for ( unsigned int ui = 0; ui < m_noItems; ui++ ) { | |
332 | wxOwnerDrawn *pNewItem = CreateLboxItem(ui); | |
333 | pNewItem->SetName(choices[ui]); | |
334 | m_aItems.Add(pNewItem); | |
335 | ListBox_SetItemData(GetHwnd(), ui, pNewItem); | |
336 | } | |
337 | } | |
338 | #endif // wxUSE_OWNER_DRAWN | |
339 | ||
340 | SetHorizontalExtent(); | |
341 | ||
342 | if ( hideAndShow ) | |
343 | { | |
344 | // show the listbox back if we hid it | |
345 | ShowWindow(GetHwnd(), SW_SHOW); | |
346 | } | |
347 | ||
348 | InvalidateBestSize(); | |
349 | } | |
350 | ||
351 | int wxListBox::FindString(const wxString& s, bool bCase) const | |
352 | { | |
353 | // back to base class search for not native search type | |
354 | if (bCase) | |
355 | return wxItemContainerImmutable::FindString( s, bCase ); | |
356 | ||
357 | int pos = ListBox_FindStringExact(GetHwnd(), -1, s); | |
358 | if (pos == LB_ERR) | |
359 | return wxNOT_FOUND; | |
360 | else | |
361 | return pos; | |
362 | } | |
363 | ||
364 | void wxListBox::Clear() | |
365 | { | |
366 | Free(); | |
367 | ||
368 | ListBox_ResetContent(GetHwnd()); | |
369 | ||
370 | m_noItems = 0; | |
371 | SetHorizontalExtent(); | |
372 | ||
373 | InvalidateBestSize(); | |
374 | } | |
375 | ||
376 | void wxListBox::Free() | |
377 | { | |
378 | #if wxUSE_OWNER_DRAWN | |
379 | if ( m_windowStyle & wxLB_OWNERDRAW ) | |
380 | { | |
381 | WX_CLEAR_ARRAY(m_aItems); | |
382 | } | |
383 | else | |
384 | #endif // wxUSE_OWNER_DRAWN | |
385 | if ( HasClientObjectData() ) | |
386 | { | |
387 | for ( unsigned int n = 0; n < m_noItems; n++ ) | |
388 | { | |
389 | delete GetClientObject(n); | |
390 | } | |
391 | } | |
392 | } | |
393 | ||
394 | void wxListBox::DoSetSelection(int N, bool select) | |
395 | { | |
396 | wxCHECK_RET( N == wxNOT_FOUND || IsValid(N), | |
397 | wxT("invalid index in wxListBox::SetSelection") ); | |
398 | ||
399 | if ( HasMultipleSelection() ) | |
400 | { | |
401 | SendMessage(GetHwnd(), LB_SETSEL, select, N); | |
402 | } | |
403 | else | |
404 | { | |
405 | SendMessage(GetHwnd(), LB_SETCURSEL, select ? N : -1, 0); | |
406 | } | |
407 | } | |
408 | ||
409 | bool wxListBox::IsSelected(int N) const | |
410 | { | |
411 | wxCHECK_MSG( IsValid(N), false, | |
412 | wxT("invalid index in wxListBox::Selected") ); | |
413 | ||
414 | return SendMessage(GetHwnd(), LB_GETSEL, N, 0) == 0 ? false : true; | |
415 | } | |
416 | ||
417 | wxClientData* wxListBox::DoGetItemClientObject(unsigned int n) const | |
418 | { | |
419 | return (wxClientData *)DoGetItemClientData(n); | |
420 | } | |
421 | ||
422 | void *wxListBox::DoGetItemClientData(unsigned int n) const | |
423 | { | |
424 | wxCHECK_MSG( IsValid(n), NULL, | |
425 | wxT("invalid index in wxListBox::GetClientData") ); | |
426 | ||
427 | return (void *)SendMessage(GetHwnd(), LB_GETITEMDATA, n, 0); | |
428 | } | |
429 | ||
430 | void wxListBox::DoSetItemClientObject(unsigned int n, wxClientData* clientData) | |
431 | { | |
432 | DoSetItemClientData(n, clientData); | |
433 | } | |
434 | ||
435 | void wxListBox::DoSetItemClientData(unsigned int n, void *clientData) | |
436 | { | |
437 | wxCHECK_RET( IsValid(n), | |
438 | wxT("invalid index in wxListBox::SetClientData") ); | |
439 | ||
440 | #if wxUSE_OWNER_DRAWN | |
441 | if ( m_windowStyle & wxLB_OWNERDRAW ) | |
442 | { | |
443 | // client data must be pointer to wxOwnerDrawn, otherwise we would crash | |
444 | // in OnMeasure/OnDraw. | |
445 | wxFAIL_MSG(wxT("Can't use client data with owner-drawn listboxes")); | |
446 | } | |
447 | #endif // wxUSE_OWNER_DRAWN | |
448 | ||
449 | if ( ListBox_SetItemData(GetHwnd(), n, clientData) == LB_ERR ) | |
450 | wxLogDebug(wxT("LB_SETITEMDATA failed")); | |
451 | } | |
452 | ||
453 | // Return number of selections and an array of selected integers | |
454 | int wxListBox::GetSelections(wxArrayInt& aSelections) const | |
455 | { | |
456 | aSelections.Empty(); | |
457 | ||
458 | if ( HasMultipleSelection() ) | |
459 | { | |
460 | int countSel = ListBox_GetSelCount(GetHwnd()); | |
461 | if ( countSel == LB_ERR ) | |
462 | { | |
463 | wxLogDebug(_T("ListBox_GetSelCount failed")); | |
464 | } | |
465 | else if ( countSel != 0 ) | |
466 | { | |
467 | int *selections = new int[countSel]; | |
468 | ||
469 | if ( ListBox_GetSelItems(GetHwnd(), | |
470 | countSel, selections) == LB_ERR ) | |
471 | { | |
472 | wxLogDebug(wxT("ListBox_GetSelItems failed")); | |
473 | countSel = -1; | |
474 | } | |
475 | else | |
476 | { | |
477 | aSelections.Alloc(countSel); | |
478 | for ( int n = 0; n < countSel; n++ ) | |
479 | aSelections.Add(selections[n]); | |
480 | } | |
481 | ||
482 | delete [] selections; | |
483 | } | |
484 | ||
485 | return countSel; | |
486 | } | |
487 | else // single-selection listbox | |
488 | { | |
489 | if (ListBox_GetCurSel(GetHwnd()) > -1) | |
490 | aSelections.Add(ListBox_GetCurSel(GetHwnd())); | |
491 | ||
492 | return aSelections.Count(); | |
493 | } | |
494 | } | |
495 | ||
496 | // Get single selection, for single choice list items | |
497 | int wxListBox::GetSelection() const | |
498 | { | |
499 | wxCHECK_MSG( !HasMultipleSelection(), | |
500 | -1, | |
501 | wxT("GetSelection() can't be used with multiple-selection listboxes, use GetSelections() instead.") ); | |
502 | ||
503 | return ListBox_GetCurSel(GetHwnd()); | |
504 | } | |
505 | ||
506 | // Find string for position | |
507 | wxString wxListBox::GetString(unsigned int n) const | |
508 | { | |
509 | wxCHECK_MSG( IsValid(n), wxEmptyString, | |
510 | wxT("invalid index in wxListBox::GetString") ); | |
511 | ||
512 | int len = ListBox_GetTextLen(GetHwnd(), n); | |
513 | ||
514 | // +1 for terminating NUL | |
515 | wxString result; | |
516 | ListBox_GetText(GetHwnd(), n, (wxChar*)wxStringBuffer(result, len + 1)); | |
517 | ||
518 | return result; | |
519 | } | |
520 | ||
521 | void | |
522 | wxListBox::DoInsertItems(const wxArrayString& items, unsigned int pos) | |
523 | { | |
524 | wxCHECK_RET( IsValidInsert(pos), | |
525 | wxT("invalid index in wxListBox::InsertItems") ); | |
526 | ||
527 | unsigned int nItems = items.GetCount(); | |
528 | for ( unsigned int i = 0; i < nItems; i++ ) | |
529 | { | |
530 | int idx = ListBox_InsertString(GetHwnd(), i + pos, items[i]); | |
531 | ||
532 | #if wxUSE_OWNER_DRAWN | |
533 | if ( m_windowStyle & wxLB_OWNERDRAW ) | |
534 | { | |
535 | wxOwnerDrawn *pNewItem = CreateLboxItem(idx); | |
536 | pNewItem->SetName(items[i]); | |
537 | pNewItem->SetFont(GetFont()); | |
538 | m_aItems.Insert(pNewItem, idx); | |
539 | ||
540 | ListBox_SetItemData(GetHwnd(), idx, pNewItem); | |
541 | } | |
542 | #else | |
543 | wxUnusedVar(idx); | |
544 | #endif // wxUSE_OWNER_DRAWN | |
545 | } | |
546 | ||
547 | m_noItems += nItems; | |
548 | ||
549 | SetHorizontalExtent(); | |
550 | ||
551 | InvalidateBestSize(); | |
552 | } | |
553 | ||
554 | int wxListBox::DoListHitTest(const wxPoint& point) const | |
555 | { | |
556 | LRESULT lRes = ::SendMessage(GetHwnd(), LB_ITEMFROMPOINT, | |
557 | 0L, MAKELONG(point.x, point.y)); | |
558 | ||
559 | // non zero high-order word means that this item is outside of the client | |
560 | // area, IOW the point is outside of the listbox | |
561 | return HIWORD(lRes) ? wxNOT_FOUND : lRes; | |
562 | } | |
563 | ||
564 | void wxListBox::SetString(unsigned int n, const wxString& s) | |
565 | { | |
566 | wxCHECK_RET( IsValid(n), | |
567 | wxT("invalid index in wxListBox::SetString") ); | |
568 | ||
569 | // remember the state of the item | |
570 | bool wasSelected = IsSelected(n); | |
571 | ||
572 | void *oldData = NULL; | |
573 | wxClientData *oldObjData = NULL; | |
574 | if ( m_clientDataItemsType == wxClientData_Void ) | |
575 | oldData = GetClientData(n); | |
576 | else if ( m_clientDataItemsType == wxClientData_Object ) | |
577 | oldObjData = GetClientObject(n); | |
578 | ||
579 | // delete and recreate it | |
580 | SendMessage(GetHwnd(), LB_DELETESTRING, n, 0); | |
581 | ||
582 | int newN = n; | |
583 | if ( n == (m_noItems - 1) ) | |
584 | newN = -1; | |
585 | ||
586 | ListBox_InsertString(GetHwnd(), newN, s); | |
587 | ||
588 | // restore the client data | |
589 | if ( oldData ) | |
590 | SetClientData(n, oldData); | |
591 | else if ( oldObjData ) | |
592 | SetClientObject(n, oldObjData); | |
593 | ||
594 | #if wxUSE_OWNER_DRAWN | |
595 | if ( m_windowStyle & wxLB_OWNERDRAW ) | |
596 | { | |
597 | // update item's text | |
598 | m_aItems[n]->SetName(s); | |
599 | ||
600 | // reassign the item's data | |
601 | ListBox_SetItemData(GetHwnd(), n, m_aItems[n]); | |
602 | } | |
603 | #endif //USE_OWNER_DRAWN | |
604 | ||
605 | // we may have lost the selection | |
606 | if ( wasSelected ) | |
607 | Select(n); | |
608 | ||
609 | InvalidateBestSize(); | |
610 | } | |
611 | ||
612 | unsigned int wxListBox::GetCount() const | |
613 | { | |
614 | return m_noItems; | |
615 | } | |
616 | ||
617 | // ---------------------------------------------------------------------------- | |
618 | // helpers | |
619 | // ---------------------------------------------------------------------------- | |
620 | ||
621 | // Windows-specific code to set the horizontal extent of the listbox, if | |
622 | // necessary. If s is non-NULL, it's used to calculate the horizontal extent. | |
623 | // Otherwise, all strings are used. | |
624 | void wxListBox::SetHorizontalExtent(const wxString& s) | |
625 | { | |
626 | // Only necessary if we want a horizontal scrollbar | |
627 | if (!(m_windowStyle & wxHSCROLL)) | |
628 | return; | |
629 | TEXTMETRIC lpTextMetric; | |
630 | ||
631 | if ( !s.empty() ) | |
632 | { | |
633 | int existingExtent = (int)SendMessage(GetHwnd(), LB_GETHORIZONTALEXTENT, 0, 0L); | |
634 | HDC dc = GetWindowDC(GetHwnd()); | |
635 | HFONT oldFont = 0; | |
636 | if (GetFont().Ok() && GetFont().GetResourceHandle() != 0) | |
637 | oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle()); | |
638 | ||
639 | GetTextMetrics(dc, &lpTextMetric); | |
640 | SIZE extentXY; | |
641 | ::GetTextExtentPoint32(dc, (LPTSTR) (const wxChar *)s, s.length(), &extentXY); | |
642 | int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth); | |
643 | ||
644 | if (oldFont) | |
645 | ::SelectObject(dc, oldFont); | |
646 | ||
647 | ReleaseDC(GetHwnd(), dc); | |
648 | if (extentX > existingExtent) | |
649 | SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(extentX), 0L); | |
650 | } | |
651 | else | |
652 | { | |
653 | int largestExtent = 0; | |
654 | HDC dc = GetWindowDC(GetHwnd()); | |
655 | HFONT oldFont = 0; | |
656 | if (GetFont().Ok() && GetFont().GetResourceHandle() != 0) | |
657 | oldFont = (HFONT) ::SelectObject(dc, (HFONT) GetFont().GetResourceHandle()); | |
658 | ||
659 | GetTextMetrics(dc, &lpTextMetric); | |
660 | ||
661 | for (unsigned int i = 0; i < m_noItems; i++) | |
662 | { | |
663 | wxString str = GetString(i); | |
664 | SIZE extentXY; | |
665 | ::GetTextExtentPoint32(dc, str.c_str(), str.length(), &extentXY); | |
666 | int extentX = (int)(extentXY.cx + lpTextMetric.tmAveCharWidth); | |
667 | if (extentX > largestExtent) | |
668 | largestExtent = extentX; | |
669 | } | |
670 | if (oldFont) | |
671 | ::SelectObject(dc, oldFont); | |
672 | ||
673 | ReleaseDC(GetHwnd(), dc); | |
674 | SendMessage(GetHwnd(), LB_SETHORIZONTALEXTENT, LOWORD(largestExtent), 0L); | |
675 | } | |
676 | } | |
677 | ||
678 | wxSize wxListBox::DoGetBestSize() const | |
679 | { | |
680 | // find the widest string | |
681 | int wLine; | |
682 | int wListbox = 0; | |
683 | for (unsigned int i = 0; i < m_noItems; i++) | |
684 | { | |
685 | wxString str(GetString(i)); | |
686 | GetTextExtent(str, &wLine, NULL); | |
687 | if ( wLine > wListbox ) | |
688 | wListbox = wLine; | |
689 | } | |
690 | ||
691 | // give it some reasonable default value if there are no strings in the | |
692 | // list | |
693 | if ( wListbox == 0 ) | |
694 | wListbox = 100; | |
695 | ||
696 | // the listbox should be slightly larger than the widest string | |
697 | int cx, cy; | |
698 | wxGetCharSize(GetHWND(), &cx, &cy, GetFont()); | |
699 | ||
700 | wListbox += 3*cx; | |
701 | ||
702 | // Add room for the scrollbar | |
703 | wListbox += wxSystemSettings::GetMetric(wxSYS_VSCROLL_X); | |
704 | ||
705 | // don't make the listbox too tall (limit height to 10 items) but don't | |
706 | // make it too small neither | |
707 | int hListbox = EDIT_HEIGHT_FROM_CHAR_HEIGHT(cy)* | |
708 | wxMin(wxMax(m_noItems, 3), 10); | |
709 | ||
710 | wxSize best(wListbox, hListbox); | |
711 | CacheBestSize(best); | |
712 | return best; | |
713 | } | |
714 | ||
715 | // ---------------------------------------------------------------------------- | |
716 | // callbacks | |
717 | // ---------------------------------------------------------------------------- | |
718 | ||
719 | bool wxListBox::MSWCommand(WXUINT param, WXWORD WXUNUSED(id)) | |
720 | { | |
721 | wxEventType evtType; | |
722 | if ( param == LBN_SELCHANGE ) | |
723 | { | |
724 | evtType = wxEVT_COMMAND_LISTBOX_SELECTED; | |
725 | } | |
726 | else if ( param == LBN_DBLCLK ) | |
727 | { | |
728 | evtType = wxEVT_COMMAND_LISTBOX_DOUBLECLICKED; | |
729 | } | |
730 | else | |
731 | { | |
732 | // some event we're not interested in | |
733 | return false; | |
734 | } | |
735 | ||
736 | wxCommandEvent event(evtType, m_windowId); | |
737 | event.SetEventObject( this ); | |
738 | ||
739 | // retrieve the affected item | |
740 | int n = SendMessage(GetHwnd(), LB_GETCARETINDEX, 0, 0); | |
741 | if ( n != LB_ERR ) | |
742 | { | |
743 | if ( HasClientObjectData() ) | |
744 | event.SetClientObject( GetClientObject(n) ); | |
745 | else if ( HasClientUntypedData() ) | |
746 | event.SetClientData( GetClientData(n) ); | |
747 | ||
748 | event.SetString(GetString(n)); | |
749 | event.SetExtraLong( HasMultipleSelection() ? IsSelected(n) : true ); | |
750 | } | |
751 | ||
752 | event.SetInt(n); | |
753 | ||
754 | return GetEventHandler()->ProcessEvent(event); | |
755 | } | |
756 | ||
757 | // ---------------------------------------------------------------------------- | |
758 | // wxCheckListBox support | |
759 | // ---------------------------------------------------------------------------- | |
760 | ||
761 | #if wxUSE_OWNER_DRAWN | |
762 | ||
763 | // drawing | |
764 | // ------- | |
765 | ||
766 | // space beneath/above each row in pixels | |
767 | // "standard" checklistbox use 1 here, some might prefer 2. 0 is ugly. | |
768 | #define OWNER_DRAWN_LISTBOX_EXTRA_SPACE (1) | |
769 | ||
770 | // the height is the same for all items | |
771 | // TODO should be changed for LBS_OWNERDRAWVARIABLE style listboxes | |
772 | ||
773 | // NB: can't forward this to wxListBoxItem because LB_SETITEMDATA | |
774 | // message is not yet sent when we get here! | |
775 | bool wxListBox::MSWOnMeasure(WXMEASUREITEMSTRUCT *item) | |
776 | { | |
777 | // only owner-drawn control should receive this message | |
778 | wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), false ); | |
779 | ||
780 | MEASUREITEMSTRUCT *pStruct = (MEASUREITEMSTRUCT *)item; | |
781 | ||
782 | #ifdef __WXWINCE__ | |
783 | HDC hdc = GetDC(NULL); | |
784 | #else | |
785 | HDC hdc = CreateIC(wxT("DISPLAY"), NULL, NULL, 0); | |
786 | #endif | |
787 | ||
788 | { | |
789 | wxDCTemp dc((WXHDC)hdc); | |
790 | dc.SetFont(GetFont()); | |
791 | ||
792 | pStruct->itemHeight = dc.GetCharHeight() + 2*OWNER_DRAWN_LISTBOX_EXTRA_SPACE; | |
793 | pStruct->itemWidth = dc.GetCharWidth(); | |
794 | } | |
795 | ||
796 | #ifdef __WXWINCE__ | |
797 | ReleaseDC(NULL, hdc); | |
798 | #else | |
799 | DeleteDC(hdc); | |
800 | #endif | |
801 | ||
802 | return true; | |
803 | } | |
804 | ||
805 | // forward the message to the appropriate item | |
806 | bool wxListBox::MSWOnDraw(WXDRAWITEMSTRUCT *item) | |
807 | { | |
808 | // only owner-drawn control should receive this message | |
809 | wxCHECK( ((m_windowStyle & wxLB_OWNERDRAW) == wxLB_OWNERDRAW), false ); | |
810 | ||
811 | DRAWITEMSTRUCT *pStruct = (DRAWITEMSTRUCT *)item; | |
812 | UINT itemID = pStruct->itemID; | |
813 | ||
814 | // the item may be -1 for an empty listbox | |
815 | if ( itemID == (UINT)-1 ) | |
816 | return false; | |
817 | ||
818 | long data = ListBox_GetItemData(GetHwnd(), pStruct->itemID); | |
819 | ||
820 | wxCHECK( data && (data != LB_ERR), false ); | |
821 | ||
822 | wxListBoxItem *pItem = (wxListBoxItem *)data; | |
823 | ||
824 | wxDCTemp dc((WXHDC)pStruct->hDC); | |
825 | wxPoint pt1(pStruct->rcItem.left, pStruct->rcItem.top); | |
826 | wxPoint pt2(pStruct->rcItem.right, pStruct->rcItem.bottom); | |
827 | wxRect rect(pt1, pt2); | |
828 | ||
829 | return pItem->OnDrawItem(dc, rect, | |
830 | (wxOwnerDrawn::wxODAction)pStruct->itemAction, | |
831 | (wxOwnerDrawn::wxODStatus)pStruct->itemState); | |
832 | } | |
833 | ||
834 | #endif // wxUSE_OWNER_DRAWN | |
835 | ||
836 | #endif // wxUSE_LISTBOX |