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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/gtk1/choice.cpp | |
3 | // Purpose: | |
4 | // Author: Robert Roebling | |
5 | // Id: $Id$ | |
6 | // Copyright: (c) 1998 Robert Roebling | |
7 | // Licence: wxWindows licence | |
8 | ///////////////////////////////////////////////////////////////////////////// | |
9 | ||
10 | #include "wx/wxprec.h" | |
11 | ||
12 | #if wxUSE_CHOICE | |
13 | ||
14 | #include "wx/choice.h" | |
15 | ||
16 | #ifndef WX_PRECOMP | |
17 | #include "wx/arrstr.h" | |
18 | #endif | |
19 | ||
20 | #include "wx/gtk1/private.h" | |
21 | ||
22 | //----------------------------------------------------------------------------- | |
23 | // idle system | |
24 | //----------------------------------------------------------------------------- | |
25 | ||
26 | extern void wxapp_install_idle_handler(); | |
27 | extern bool g_isIdle; | |
28 | ||
29 | //----------------------------------------------------------------------------- | |
30 | // data | |
31 | //----------------------------------------------------------------------------- | |
32 | ||
33 | extern bool g_blockEventsOnDrag; | |
34 | ||
35 | //----------------------------------------------------------------------------- | |
36 | // "activate" | |
37 | //----------------------------------------------------------------------------- | |
38 | ||
39 | extern "C" { | |
40 | static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice ) | |
41 | { | |
42 | if (g_isIdle) | |
43 | wxapp_install_idle_handler(); | |
44 | ||
45 | if (!choice->m_hasVMT) return; | |
46 | ||
47 | if (g_blockEventsOnDrag) return; | |
48 | ||
49 | int selection = wxNOT_FOUND; | |
50 | ||
51 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(choice->GetHandle()) ) ); | |
52 | int count = 0; | |
53 | ||
54 | GList *child = menu_shell->children; | |
55 | while (child) | |
56 | { | |
57 | GtkBin *bin = GTK_BIN( child->data ); | |
58 | if (!bin->child) | |
59 | { | |
60 | selection = count; | |
61 | break; | |
62 | } | |
63 | child = child->next; | |
64 | count++; | |
65 | } | |
66 | ||
67 | choice->m_selection_hack = selection; | |
68 | ||
69 | wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() ); | |
70 | int n = choice->GetSelection(); | |
71 | ||
72 | event.SetInt( n ); | |
73 | event.SetString( choice->GetStringSelection() ); | |
74 | event.SetEventObject(choice); | |
75 | ||
76 | if ( choice->HasClientObjectData() ) | |
77 | event.SetClientObject( choice->GetClientObject(n) ); | |
78 | else if ( choice->HasClientUntypedData() ) | |
79 | event.SetClientData( choice->GetClientData(n) ); | |
80 | ||
81 | choice->HandleWindowEvent(event); | |
82 | } | |
83 | } | |
84 | ||
85 | //----------------------------------------------------------------------------- | |
86 | // wxChoice | |
87 | //----------------------------------------------------------------------------- | |
88 | ||
89 | IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems) | |
90 | ||
91 | wxChoice::wxChoice() | |
92 | { | |
93 | m_strings = (wxSortedArrayString *)NULL; | |
94 | } | |
95 | ||
96 | bool wxChoice::Create( wxWindow *parent, wxWindowID id, | |
97 | const wxPoint &pos, const wxSize &size, | |
98 | const wxArrayString& choices, | |
99 | long style, const wxValidator& validator, | |
100 | const wxString &name ) | |
101 | { | |
102 | wxCArrayString chs(choices); | |
103 | ||
104 | return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(), | |
105 | style, validator, name ); | |
106 | } | |
107 | ||
108 | bool wxChoice::Create( wxWindow *parent, wxWindowID id, | |
109 | const wxPoint &pos, const wxSize &size, | |
110 | int n, const wxString choices[], | |
111 | long style, const wxValidator& validator, const wxString &name ) | |
112 | { | |
113 | m_needParent = true; | |
114 | #if (GTK_MINOR_VERSION > 0) | |
115 | m_acceptsFocus = true; | |
116 | #endif | |
117 | ||
118 | if (!PreCreation( parent, pos, size ) || | |
119 | !CreateBase( parent, id, pos, size, style, validator, name )) | |
120 | { | |
121 | wxFAIL_MSG( wxT("wxChoice creation failed") ); | |
122 | return false; | |
123 | } | |
124 | ||
125 | m_widget = gtk_option_menu_new(); | |
126 | ||
127 | if ( style & wxCB_SORT ) | |
128 | { | |
129 | // if our m_strings != NULL, Append() will check for it and insert | |
130 | // items in the correct order | |
131 | m_strings = new wxSortedArrayString; | |
132 | } | |
133 | ||
134 | // begin with no selection | |
135 | m_selection_hack = wxNOT_FOUND; | |
136 | ||
137 | GtkWidget *menu = gtk_menu_new(); | |
138 | ||
139 | for (unsigned int i = 0; i < (unsigned int)n; i++) | |
140 | { | |
141 | GtkAddHelper(menu, i, choices[i]); | |
142 | } | |
143 | ||
144 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); | |
145 | ||
146 | m_parent->DoAddChild( this ); | |
147 | ||
148 | PostCreation(size); | |
149 | SetInitialSize(size); // need this too because this is a wxControlWithItems | |
150 | ||
151 | return true; | |
152 | } | |
153 | ||
154 | wxChoice::~wxChoice() | |
155 | { | |
156 | Clear(); | |
157 | ||
158 | delete m_strings; | |
159 | } | |
160 | ||
161 | int wxChoice::DoInsertItems(const wxArrayStringsAdapter & items, | |
162 | unsigned int pos, | |
163 | void **clientData, wxClientDataType type) | |
164 | { | |
165 | wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") ); | |
166 | ||
167 | const unsigned int count = items.GetCount(); | |
168 | ||
169 | GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ); | |
170 | ||
171 | for ( unsigned int i = 0; i < count; ++i, ++pos ) | |
172 | { | |
173 | int n = GtkAddHelper(menu, pos, items[i]); | |
174 | if ( n == wxNOT_FOUND ) | |
175 | return n; | |
176 | ||
177 | AssignNewItemClientData(n, clientData, i, type); | |
178 | } | |
179 | ||
180 | // if the item to insert is at or before the selection, and the selection is valid | |
181 | if (((int)pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND)) | |
182 | { | |
183 | // move the selection forward | |
184 | m_selection_hack += count; | |
185 | } | |
186 | ||
187 | return pos - 1; | |
188 | } | |
189 | ||
190 | void wxChoice::DoSetItemClientData(unsigned int n, void* clientData) | |
191 | { | |
192 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") ); | |
193 | ||
194 | wxList::compatibility_iterator node = m_clientList.Item( n ); | |
195 | wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") ); | |
196 | ||
197 | node->SetData( (wxObject*) clientData ); | |
198 | } | |
199 | ||
200 | void* wxChoice::DoGetItemClientData(unsigned int n) const | |
201 | { | |
202 | wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") ); | |
203 | ||
204 | wxList::compatibility_iterator node = m_clientList.Item( n ); | |
205 | wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") ); | |
206 | ||
207 | return node->GetData(); | |
208 | } | |
209 | ||
210 | void wxChoice::DoClear() | |
211 | { | |
212 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
213 | ||
214 | gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) ); | |
215 | GtkWidget *menu = gtk_menu_new(); | |
216 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); | |
217 | ||
218 | m_clientList.Clear(); | |
219 | ||
220 | if ( m_strings ) | |
221 | m_strings->Clear(); | |
222 | ||
223 | // begin with no selection | |
224 | m_selection_hack = wxNOT_FOUND; | |
225 | } | |
226 | ||
227 | void wxChoice::DoDeleteOneItem(unsigned int n) | |
228 | { | |
229 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
230 | ||
231 | wxCHECK_RET( IsValid(n), _T("invalid index in wxChoice::Delete") ); | |
232 | ||
233 | // if the item to delete is before the selection, and the selection is valid | |
234 | if (((int)n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND)) | |
235 | { | |
236 | // move the selection back one | |
237 | m_selection_hack--; | |
238 | } | |
239 | else if ((int)n == m_selection_hack) | |
240 | { | |
241 | // invalidate the selection | |
242 | m_selection_hack = wxNOT_FOUND; | |
243 | } | |
244 | ||
245 | // VZ: apparently GTK+ doesn't have a built-in function to do it (not even | |
246 | // in 2.0), hence this dumb implementation -- still better than nothing | |
247 | const unsigned int count = GetCount(); | |
248 | ||
249 | wxList::compatibility_iterator node = m_clientList.GetFirst(); | |
250 | ||
251 | wxArrayString items; | |
252 | wxArrayPtrVoid itemsData; | |
253 | items.Alloc(count); | |
254 | for ( unsigned i = 0; i < count; i++, node = node->GetNext() ) | |
255 | { | |
256 | if ( i != n ) | |
257 | { | |
258 | items.Add(GetString(i)); | |
259 | itemsData.Add(node->GetData()); | |
260 | } | |
261 | } | |
262 | ||
263 | wxChoice::DoClear(); | |
264 | ||
265 | void ** const data = &itemsData[0]; | |
266 | if ( HasClientObjectData() ) | |
267 | Append(items, reinterpret_cast<wxClientData **>(data)); | |
268 | else | |
269 | Append(items, data); | |
270 | } | |
271 | ||
272 | int wxChoice::FindString( const wxString &string, bool bCase ) const | |
273 | { | |
274 | wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid choice") ); | |
275 | ||
276 | // If you read this code once and you think you understand | |
277 | // it, then you are very wrong. Robert Roebling. | |
278 | ||
279 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
280 | int count = 0; | |
281 | GList *child = menu_shell->children; | |
282 | while (child) | |
283 | { | |
284 | GtkBin *bin = GTK_BIN( child->data ); | |
285 | GtkLabel *label = (GtkLabel *) NULL; | |
286 | if (bin->child) | |
287 | label = GTK_LABEL(bin->child); | |
288 | if (!label) | |
289 | label = GTK_LABEL( BUTTON_CHILD(m_widget) ); | |
290 | ||
291 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
292 | ||
293 | wxString tmp( label->label ); | |
294 | ||
295 | if (string.IsSameAs( tmp, bCase )) | |
296 | return count; | |
297 | ||
298 | child = child->next; | |
299 | count++; | |
300 | } | |
301 | ||
302 | return wxNOT_FOUND; | |
303 | } | |
304 | ||
305 | int wxChoice::GetSelection() const | |
306 | { | |
307 | wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid choice") ); | |
308 | ||
309 | return m_selection_hack; | |
310 | ||
311 | } | |
312 | ||
313 | void wxChoice::SetString(unsigned int n, const wxString& str ) | |
314 | { | |
315 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
316 | ||
317 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
318 | unsigned int count = 0; | |
319 | GList *child = menu_shell->children; | |
320 | while (child) | |
321 | { | |
322 | GtkBin *bin = GTK_BIN( child->data ); | |
323 | if (count == n) | |
324 | { | |
325 | GtkLabel *label = (GtkLabel *) NULL; | |
326 | if (bin->child) | |
327 | label = GTK_LABEL(bin->child); | |
328 | if (!label) | |
329 | label = GTK_LABEL( BUTTON_CHILD(m_widget) ); | |
330 | ||
331 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
332 | ||
333 | gtk_label_set_text( label, wxGTK_CONV( str ) ); | |
334 | ||
335 | return; | |
336 | } | |
337 | child = child->next; | |
338 | count++; | |
339 | } | |
340 | } | |
341 | ||
342 | wxString wxChoice::GetString(unsigned int n) const | |
343 | { | |
344 | wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid choice") ); | |
345 | ||
346 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
347 | unsigned int count = 0; | |
348 | GList *child = menu_shell->children; | |
349 | while (child) | |
350 | { | |
351 | GtkBin *bin = GTK_BIN( child->data ); | |
352 | if (count == n) | |
353 | { | |
354 | GtkLabel *label = (GtkLabel *) NULL; | |
355 | if (bin->child) | |
356 | label = GTK_LABEL(bin->child); | |
357 | if (!label) | |
358 | label = GTK_LABEL( BUTTON_CHILD(m_widget) ); | |
359 | ||
360 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
361 | ||
362 | return wxString( label->label ); | |
363 | } | |
364 | child = child->next; | |
365 | count++; | |
366 | } | |
367 | ||
368 | wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") ); | |
369 | ||
370 | return wxEmptyString; | |
371 | } | |
372 | ||
373 | unsigned int wxChoice::GetCount() const | |
374 | { | |
375 | wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") ); | |
376 | ||
377 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
378 | unsigned int count = 0; | |
379 | GList *child = menu_shell->children; | |
380 | while (child) | |
381 | { | |
382 | count++; | |
383 | child = child->next; | |
384 | } | |
385 | return count; | |
386 | } | |
387 | ||
388 | void wxChoice::SetSelection( int n ) | |
389 | { | |
390 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
391 | ||
392 | int tmp = n; | |
393 | gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp ); | |
394 | ||
395 | // set the local selection variable manually | |
396 | if (IsValid((unsigned int)n)) | |
397 | { | |
398 | // a valid selection has been made | |
399 | m_selection_hack = n; | |
400 | } | |
401 | else if ((n == wxNOT_FOUND) || (GetCount() == 0)) | |
402 | { | |
403 | // invalidates the selection if there are no items | |
404 | // or if it is specifically set to wxNOT_FOUND | |
405 | m_selection_hack = wxNOT_FOUND; | |
406 | } | |
407 | else | |
408 | { | |
409 | // this selects the first item by default if the selection is out of bounds | |
410 | m_selection_hack = 0; | |
411 | } | |
412 | } | |
413 | ||
414 | void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style) | |
415 | { | |
416 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
417 | ||
418 | gtk_widget_modify_style( m_widget, style ); | |
419 | gtk_widget_modify_style( GTK_WIDGET( menu_shell ), style ); | |
420 | ||
421 | GList *child = menu_shell->children; | |
422 | while (child) | |
423 | { | |
424 | gtk_widget_modify_style( GTK_WIDGET( child->data ), style ); | |
425 | ||
426 | GtkBin *bin = GTK_BIN( child->data ); | |
427 | GtkWidget *label = (GtkWidget *) NULL; | |
428 | if (bin->child) | |
429 | label = bin->child; | |
430 | if (!label) | |
431 | label = BUTTON_CHILD(m_widget); | |
432 | ||
433 | gtk_widget_modify_style( label, style ); | |
434 | ||
435 | child = child->next; | |
436 | } | |
437 | } | |
438 | ||
439 | int wxChoice::GtkAddHelper(GtkWidget *menu, unsigned int pos, const wxString& item) | |
440 | { | |
441 | wxCHECK_MSG(pos<=m_clientList.GetCount(), -1, wxT("invalid index")); | |
442 | ||
443 | GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) ); | |
444 | ||
445 | size_t index; | |
446 | if ( m_strings ) | |
447 | { | |
448 | // sorted control, need to insert at the correct index | |
449 | index = m_strings->Add(item); | |
450 | ||
451 | gtk_menu_insert( GTK_MENU(menu), menu_item, index ); | |
452 | ||
453 | if ( index ) | |
454 | { | |
455 | m_clientList.Insert( m_clientList.Item(index - 1), | |
456 | (wxObject*) NULL ); | |
457 | } | |
458 | else | |
459 | { | |
460 | m_clientList.Insert( (wxObject*) NULL ); | |
461 | } | |
462 | } | |
463 | else | |
464 | { | |
465 | // don't call wxChoice::GetCount() from here because it doesn't work | |
466 | // if we're called from ctor (and GtkMenuShell is still NULL) | |
467 | ||
468 | // normal control, just append | |
469 | if (pos == m_clientList.GetCount()) | |
470 | { | |
471 | gtk_menu_append( GTK_MENU(menu), menu_item ); | |
472 | m_clientList.Append( (wxObject*) NULL ); | |
473 | index = m_clientList.GetCount() - 1; | |
474 | } | |
475 | else | |
476 | { | |
477 | gtk_menu_insert( GTK_MENU(menu), menu_item, pos ); | |
478 | m_clientList.Insert( pos, (wxObject*) NULL ); | |
479 | index = pos; | |
480 | } | |
481 | } | |
482 | ||
483 | if (GTK_WIDGET_REALIZED(m_widget)) | |
484 | { | |
485 | gtk_widget_realize( menu_item ); | |
486 | gtk_widget_realize( GTK_BIN(menu_item)->child ); | |
487 | ||
488 | ApplyWidgetStyle(); | |
489 | } | |
490 | ||
491 | // The best size of a wxChoice should probably | |
492 | // be changed everytime the control has been | |
493 | // changed, but at least after adding an item | |
494 | // it has to change. Adapted from Matt Ownby. | |
495 | InvalidateBestSize(); | |
496 | ||
497 | gtk_signal_connect_after( GTK_OBJECT( menu_item ), "activate", | |
498 | GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this ); | |
499 | ||
500 | gtk_widget_show( menu_item ); | |
501 | ||
502 | // return the index of the item in the control | |
503 | return index; | |
504 | } | |
505 | ||
506 | wxSize wxChoice::DoGetBestSize() const | |
507 | { | |
508 | wxSize ret( wxControl::DoGetBestSize() ); | |
509 | ||
510 | // we know better our horizontal extent: it depends on the longest string | |
511 | // we have | |
512 | ret.x = 0; | |
513 | if ( m_widget ) | |
514 | { | |
515 | int width; | |
516 | unsigned int count = GetCount(); | |
517 | for ( unsigned int n = 0; n < count; n++ ) | |
518 | { | |
519 | GetTextExtent(GetString(n), &width, NULL, NULL, NULL ); | |
520 | if ( width > ret.x ) | |
521 | ret.x = width; | |
522 | } | |
523 | ||
524 | // add extra for the choice "=" button | |
525 | ||
526 | // VZ: I don't know how to get the right value, it seems to be in | |
527 | // GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get | |
528 | // to it - maybe we can use gtk_option_menu_size_request() for this | |
529 | // somehow? | |
530 | // | |
531 | // This default value works only for the default GTK+ theme (i.e. | |
532 | // no theme at all) (FIXME) | |
533 | static const int widthChoiceIndicator = 35; | |
534 | ret.x += widthChoiceIndicator; | |
535 | } | |
536 | ||
537 | // but not less than the minimal width | |
538 | if ( ret.x < 80 ) | |
539 | ret.x = 80; | |
540 | ||
541 | // If this request_size is called with no entries then | |
542 | // the returned height is wrong. Give it a reasonable | |
543 | // default value. | |
544 | if (ret.y <= 18) | |
545 | ret.y = 8 + GetCharHeight(); | |
546 | ||
547 | CacheBestSize(ret); | |
548 | return ret; | |
549 | } | |
550 | ||
551 | bool wxChoice::IsOwnGtkWindow( GdkWindow *window ) | |
552 | { | |
553 | return (window == m_widget->window); | |
554 | } | |
555 | ||
556 | // static | |
557 | wxVisualAttributes | |
558 | wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) | |
559 | { | |
560 | return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new); | |
561 | } | |
562 | ||
563 | ||
564 | #endif // wxUSE_CHOICE |