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1 | ///////////////////////////////////////////////////////////////////////////// | |
2 | // Name: src/gtk/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 | // FIXME: We use GtkOptionMenu which has been deprecated since GTK+ 2.3.0 in | |
21 | // favour of GtkComboBox. | |
22 | // Later use GtkComboBox if GTK+ runtime version is new enough. | |
23 | #include <gtk/gtkversion.h> | |
24 | #if defined(GTK_DISABLE_DEPRECATED) && GTK_CHECK_VERSION(2,3,0) | |
25 | #undef GTK_DISABLE_DEPRECATED | |
26 | #endif | |
27 | ||
28 | #include "wx/gtk/private.h" | |
29 | ||
30 | //----------------------------------------------------------------------------- | |
31 | // data | |
32 | //----------------------------------------------------------------------------- | |
33 | ||
34 | extern bool g_blockEventsOnDrag; | |
35 | ||
36 | //----------------------------------------------------------------------------- | |
37 | // "activate" | |
38 | //----------------------------------------------------------------------------- | |
39 | ||
40 | extern "C" { | |
41 | static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice ) | |
42 | { | |
43 | if (!choice->m_hasVMT) return; | |
44 | ||
45 | if (g_blockEventsOnDrag) return; | |
46 | ||
47 | int selection = wxNOT_FOUND; | |
48 | ||
49 | selection = gtk_option_menu_get_history( GTK_OPTION_MENU(choice->GetHandle()) ); | |
50 | ||
51 | choice->m_selection_hack = selection; | |
52 | ||
53 | wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() ); | |
54 | int n = choice->GetSelection(); | |
55 | ||
56 | event.SetInt( n ); | |
57 | event.SetString( choice->GetStringSelection() ); | |
58 | event.SetEventObject(choice); | |
59 | ||
60 | if ( choice->HasClientObjectData() ) | |
61 | event.SetClientObject( choice->GetClientObject(n) ); | |
62 | else if ( choice->HasClientUntypedData() ) | |
63 | event.SetClientData( choice->GetClientData(n) ); | |
64 | ||
65 | choice->GetEventHandler()->ProcessEvent(event); | |
66 | } | |
67 | } | |
68 | ||
69 | //----------------------------------------------------------------------------- | |
70 | // wxChoice | |
71 | //----------------------------------------------------------------------------- | |
72 | ||
73 | IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl) | |
74 | ||
75 | wxChoice::wxChoice() | |
76 | { | |
77 | m_strings = (wxSortedArrayString *)NULL; | |
78 | } | |
79 | ||
80 | bool wxChoice::Create( wxWindow *parent, wxWindowID id, | |
81 | const wxPoint &pos, const wxSize &size, | |
82 | const wxArrayString& choices, | |
83 | long style, const wxValidator& validator, | |
84 | const wxString &name ) | |
85 | { | |
86 | wxCArrayString chs(choices); | |
87 | ||
88 | return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(), | |
89 | style, validator, name ); | |
90 | } | |
91 | ||
92 | bool wxChoice::Create( wxWindow *parent, wxWindowID id, | |
93 | const wxPoint &pos, const wxSize &size, | |
94 | int n, const wxString choices[], | |
95 | long style, const wxValidator& validator, const wxString &name ) | |
96 | { | |
97 | if (!PreCreation( parent, pos, size ) || | |
98 | !CreateBase( parent, id, pos, size, style, validator, name )) | |
99 | { | |
100 | wxFAIL_MSG( wxT("wxChoice creation failed") ); | |
101 | return false; | |
102 | } | |
103 | ||
104 | m_widget = gtk_option_menu_new(); | |
105 | ||
106 | if ( IsSorted() ) | |
107 | { | |
108 | // if our m_strings != NULL, Append() will check for it and insert | |
109 | // items in the correct order | |
110 | m_strings = new wxSortedArrayString; | |
111 | } | |
112 | ||
113 | // begin with no selection | |
114 | m_selection_hack = wxNOT_FOUND; | |
115 | ||
116 | GtkWidget *menu = gtk_menu_new(); | |
117 | ||
118 | for (unsigned int i = 0; i < (unsigned int)n; i++) | |
119 | { | |
120 | GtkAddHelper(menu, i, choices[i]); | |
121 | } | |
122 | ||
123 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); | |
124 | ||
125 | m_parent->DoAddChild( this ); | |
126 | ||
127 | PostCreation(size); | |
128 | SetInitialSize(size); // need this too because this is a wxControlWithItems | |
129 | ||
130 | return true; | |
131 | } | |
132 | ||
133 | wxChoice::~wxChoice() | |
134 | { | |
135 | Clear(); | |
136 | ||
137 | delete m_strings; | |
138 | } | |
139 | ||
140 | int wxChoice::DoInsertItems(const wxArrayStringsAdapter & items, | |
141 | unsigned int pos, | |
142 | void **clientData, wxClientDataType type) | |
143 | { | |
144 | wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") ); | |
145 | ||
146 | const unsigned int count = items.GetCount(); | |
147 | ||
148 | GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ); | |
149 | ||
150 | for ( unsigned int i = 0; i < count; ++i, ++pos ) | |
151 | { | |
152 | int n = GtkAddHelper(menu, pos, items[i]); | |
153 | if ( n == wxNOT_FOUND ) | |
154 | return n; | |
155 | ||
156 | AssignNewItemClientData(n, clientData, i, type); | |
157 | } | |
158 | ||
159 | // if the item to insert is at or before the selection, and the selection is valid | |
160 | if (((int)pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND)) | |
161 | { | |
162 | // move the selection forward | |
163 | m_selection_hack += count; | |
164 | } | |
165 | ||
166 | return pos - 1; | |
167 | } | |
168 | ||
169 | void wxChoice::DoSetItemClientData(unsigned int n, void* clientData) | |
170 | { | |
171 | m_clientData[n] = clientData; | |
172 | } | |
173 | ||
174 | void* wxChoice::DoGetItemClientData(unsigned int n) const | |
175 | { | |
176 | return m_clientData[n]; | |
177 | } | |
178 | ||
179 | void wxChoice::DoClear() | |
180 | { | |
181 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
182 | ||
183 | gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) ); | |
184 | GtkWidget *menu = gtk_menu_new(); | |
185 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); | |
186 | ||
187 | m_clientData.Clear(); | |
188 | ||
189 | if ( m_strings ) | |
190 | m_strings->Clear(); | |
191 | ||
192 | // begin with no selection | |
193 | m_selection_hack = wxNOT_FOUND; | |
194 | } | |
195 | ||
196 | void wxChoice::DoDeleteOneItem(unsigned int n) | |
197 | { | |
198 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
199 | wxCHECK_RET( IsValid(n), _T("invalid index in wxChoice::Delete") ); | |
200 | ||
201 | // if the item to delete is before the selection, and the selection is valid | |
202 | if (((int)n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND)) | |
203 | { | |
204 | // move the selection back one | |
205 | m_selection_hack--; | |
206 | } | |
207 | else if ((int)n == m_selection_hack) | |
208 | { | |
209 | // invalidate the selection | |
210 | m_selection_hack = wxNOT_FOUND; | |
211 | } | |
212 | ||
213 | // VZ: apparently GTK+ doesn't have a built-in function to do it (not even | |
214 | // in 2.0), hence this dumb implementation -- still better than nothing | |
215 | const unsigned int count = GetCount(); | |
216 | ||
217 | wxArrayString items; | |
218 | wxArrayPtrVoid itemsData; | |
219 | items.Alloc(count); | |
220 | itemsData.Alloc(count); | |
221 | for ( unsigned i = 0; i < count; i++ ) | |
222 | { | |
223 | if ( i != n ) | |
224 | { | |
225 | items.Add(GetString(i)); | |
226 | itemsData.Add(m_clientData[i]); | |
227 | } | |
228 | } | |
229 | ||
230 | wxChoice::DoClear(); | |
231 | ||
232 | void ** const data = &itemsData[0]; | |
233 | if ( HasClientObjectData() ) | |
234 | Append(items, wx_reinterpret_cast(wxClientData **, data)); | |
235 | else | |
236 | Append(items, data); | |
237 | } | |
238 | ||
239 | int wxChoice::FindString( const wxString &string, bool bCase ) const | |
240 | { | |
241 | wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid choice") ); | |
242 | ||
243 | // If you read this code once and you think you understand | |
244 | // it, then you are very wrong. Robert Roebling. | |
245 | ||
246 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
247 | int count = 0; | |
248 | GList *child = menu_shell->children; | |
249 | while (child) | |
250 | { | |
251 | GtkBin *bin = GTK_BIN( child->data ); | |
252 | GtkLabel *label = (GtkLabel *) NULL; | |
253 | if (bin->child) | |
254 | label = GTK_LABEL(bin->child); | |
255 | if (!label) | |
256 | label = GTK_LABEL(GTK_BIN(m_widget)->child); | |
257 | ||
258 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
259 | ||
260 | wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) ); | |
261 | if (string.IsSameAs( tmp, bCase )) | |
262 | return count; | |
263 | ||
264 | child = child->next; | |
265 | count++; | |
266 | } | |
267 | ||
268 | return wxNOT_FOUND; | |
269 | } | |
270 | ||
271 | int wxChoice::GetSelection() const | |
272 | { | |
273 | wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid choice") ); | |
274 | ||
275 | return m_selection_hack; | |
276 | ||
277 | } | |
278 | ||
279 | void wxChoice::SetString(unsigned int n, const wxString& str) | |
280 | { | |
281 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
282 | ||
283 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
284 | unsigned int count = 0; | |
285 | GList *child = menu_shell->children; | |
286 | while (child) | |
287 | { | |
288 | GtkBin *bin = GTK_BIN( child->data ); | |
289 | if (count == n) | |
290 | { | |
291 | GtkLabel *label = (GtkLabel *) NULL; | |
292 | if (bin->child) | |
293 | label = GTK_LABEL(bin->child); | |
294 | if (!label) | |
295 | label = GTK_LABEL(GTK_BIN(m_widget)->child); | |
296 | ||
297 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
298 | ||
299 | gtk_label_set_text( label, wxGTK_CONV( str ) ); | |
300 | ||
301 | InvalidateBestSize(); | |
302 | ||
303 | return; | |
304 | } | |
305 | child = child->next; | |
306 | count++; | |
307 | } | |
308 | } | |
309 | ||
310 | wxString wxChoice::GetString(unsigned int n) const | |
311 | { | |
312 | wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid choice") ); | |
313 | ||
314 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
315 | unsigned int count = 0; | |
316 | GList *child = menu_shell->children; | |
317 | while (child) | |
318 | { | |
319 | GtkBin *bin = GTK_BIN( child->data ); | |
320 | if (count == n) | |
321 | { | |
322 | GtkLabel *label = (GtkLabel *) NULL; | |
323 | if (bin->child) | |
324 | label = GTK_LABEL(bin->child); | |
325 | if (!label) | |
326 | label = GTK_LABEL(GTK_BIN(m_widget)->child); | |
327 | ||
328 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); | |
329 | ||
330 | return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) ); | |
331 | } | |
332 | child = child->next; | |
333 | count++; | |
334 | } | |
335 | ||
336 | wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") ); | |
337 | ||
338 | return wxEmptyString; | |
339 | } | |
340 | ||
341 | unsigned int wxChoice::GetCount() const | |
342 | { | |
343 | wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") ); | |
344 | ||
345 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
346 | unsigned int count = 0; | |
347 | GList *child = menu_shell->children; | |
348 | while (child) | |
349 | { | |
350 | count++; | |
351 | child = child->next; | |
352 | } | |
353 | return count; | |
354 | } | |
355 | ||
356 | void wxChoice::SetSelection( int n ) | |
357 | { | |
358 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); | |
359 | ||
360 | int tmp = n; | |
361 | gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp ); | |
362 | ||
363 | // set the local selection variable manually | |
364 | if ((n >= 0) && ((unsigned int)n < GetCount())) | |
365 | { | |
366 | // a valid selection has been made | |
367 | m_selection_hack = n; | |
368 | } | |
369 | else if ((n == wxNOT_FOUND) || (GetCount() == 0)) | |
370 | { | |
371 | // invalidates the selection if there are no items | |
372 | // or if it is specifically set to wxNOT_FOUND | |
373 | m_selection_hack = wxNOT_FOUND; | |
374 | } | |
375 | else | |
376 | { | |
377 | // this selects the first item by default if the selection is out of bounds | |
378 | m_selection_hack = 0; | |
379 | } | |
380 | } | |
381 | ||
382 | void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style) | |
383 | { | |
384 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); | |
385 | ||
386 | gtk_widget_modify_style( m_widget, style ); | |
387 | gtk_widget_modify_style( GTK_WIDGET( menu_shell ), style ); | |
388 | ||
389 | GList *child = menu_shell->children; | |
390 | while (child) | |
391 | { | |
392 | gtk_widget_modify_style( GTK_WIDGET( child->data ), style ); | |
393 | ||
394 | GtkBin *bin = GTK_BIN( child->data ); | |
395 | GtkWidget *label = (GtkWidget *) NULL; | |
396 | if (bin->child) | |
397 | label = bin->child; | |
398 | if (!label) | |
399 | label = GTK_BIN(m_widget)->child; | |
400 | ||
401 | gtk_widget_modify_style( label, style ); | |
402 | ||
403 | child = child->next; | |
404 | } | |
405 | } | |
406 | ||
407 | int wxChoice::GtkAddHelper(GtkWidget *menu, unsigned int pos, const wxString& item) | |
408 | { | |
409 | wxCHECK_MSG(pos<=m_clientData.GetCount(), -1, wxT("invalid index")); | |
410 | ||
411 | GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) ); | |
412 | ||
413 | if ( m_strings ) | |
414 | { | |
415 | // sorted control, need to insert at the correct index | |
416 | pos = m_strings->Add(item); | |
417 | } | |
418 | ||
419 | // don't call wxChoice::GetCount() from here because it doesn't work | |
420 | // if we're called from ctor (and GtkMenuShell is still NULL) | |
421 | if (pos == m_clientData.GetCount()) | |
422 | gtk_menu_shell_append( GTK_MENU_SHELL(menu), menu_item ); | |
423 | else | |
424 | gtk_menu_shell_insert( GTK_MENU_SHELL(menu), menu_item, pos ); | |
425 | ||
426 | m_clientData.Insert( NULL, pos ); | |
427 | ||
428 | if (GTK_WIDGET_REALIZED(m_widget)) | |
429 | { | |
430 | gtk_widget_realize( menu_item ); | |
431 | gtk_widget_realize( GTK_BIN(menu_item)->child ); | |
432 | ||
433 | ApplyWidgetStyle(); | |
434 | } | |
435 | ||
436 | // The best size of a wxChoice should probably | |
437 | // be changed everytime the control has been | |
438 | // changed, but at least after adding an item | |
439 | // it has to change. Adapted from Matt Ownby. | |
440 | InvalidateBestSize(); | |
441 | ||
442 | g_signal_connect_after (menu_item, "activate", | |
443 | G_CALLBACK (gtk_choice_clicked_callback), | |
444 | this); | |
445 | ||
446 | gtk_widget_show( menu_item ); | |
447 | ||
448 | // return the index of the item in the control | |
449 | return pos; | |
450 | } | |
451 | ||
452 | wxSize wxChoice::DoGetBestSize() const | |
453 | { | |
454 | wxSize ret( wxControl::DoGetBestSize() ); | |
455 | ||
456 | // we know better our horizontal extent: it depends on the longest string | |
457 | // we have | |
458 | ret.x = 0; | |
459 | if ( m_widget ) | |
460 | { | |
461 | int width; | |
462 | unsigned int count = GetCount(); | |
463 | for ( unsigned int n = 0; n < count; n++ ) | |
464 | { | |
465 | GetTextExtent( GetString(n), &width, NULL, NULL, NULL ); | |
466 | if ( width > ret.x ) | |
467 | ret.x = width; | |
468 | } | |
469 | ||
470 | // add extra for the choice "=" button | |
471 | ||
472 | // VZ: I don't know how to get the right value, it seems to be in | |
473 | // GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get | |
474 | // to it - maybe we can use gtk_option_menu_size_request() for this | |
475 | // somehow? | |
476 | // | |
477 | // This default value works only for the default GTK+ theme (i.e. | |
478 | // no theme at all) (FIXME) | |
479 | static const int widthChoiceIndicator = 35; | |
480 | ret.x += widthChoiceIndicator; | |
481 | } | |
482 | ||
483 | // but not less than the minimal width | |
484 | if ( ret.x < 80 ) | |
485 | ret.x = 80; | |
486 | ||
487 | // If this request_size is called with no entries then | |
488 | // the returned height is wrong. Give it a reasonable | |
489 | // default value. | |
490 | if (ret.y <= 18) | |
491 | ret.y = 8 + GetCharHeight(); | |
492 | ||
493 | CacheBestSize(ret); | |
494 | return ret; | |
495 | } | |
496 | ||
497 | GdkWindow *wxChoice::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const | |
498 | { | |
499 | return GTK_BUTTON(m_widget)->event_window; | |
500 | } | |
501 | ||
502 | // static | |
503 | wxVisualAttributes | |
504 | wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant)) | |
505 | { | |
506 | return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new); | |
507 | } | |
508 | ||
509 | ||
510 | #endif // wxUSE_CHOICE |