| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: choice.cpp |
| 3 | // Purpose: |
| 4 | // Author: Robert Roebling |
| 5 | // Id: $Id$ |
| 6 | // Copyright: (c) 1998 Robert Roebling |
| 7 | // Licence: wxWindows licence |
| 8 | ///////////////////////////////////////////////////////////////////////////// |
| 9 | |
| 10 | |
| 11 | #ifdef __GNUG__ |
| 12 | #pragma implementation "choice.h" |
| 13 | #endif |
| 14 | |
| 15 | #include "wx/defs.h" |
| 16 | |
| 17 | #if wxUSE_CHOICE |
| 18 | |
| 19 | #include "wx/choice.h" |
| 20 | |
| 21 | #include <gdk/gdk.h> |
| 22 | #include <gtk/gtk.h> |
| 23 | |
| 24 | //----------------------------------------------------------------------------- |
| 25 | // idle system |
| 26 | //----------------------------------------------------------------------------- |
| 27 | |
| 28 | extern void wxapp_install_idle_handler(); |
| 29 | extern bool g_isIdle; |
| 30 | |
| 31 | //----------------------------------------------------------------------------- |
| 32 | // data |
| 33 | //----------------------------------------------------------------------------- |
| 34 | |
| 35 | extern bool g_blockEventsOnDrag; |
| 36 | |
| 37 | //----------------------------------------------------------------------------- |
| 38 | // "activate" |
| 39 | //----------------------------------------------------------------------------- |
| 40 | |
| 41 | static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice ) |
| 42 | { |
| 43 | if (g_isIdle) |
| 44 | wxapp_install_idle_handler(); |
| 45 | |
| 46 | if (!choice->m_hasVMT) return; |
| 47 | |
| 48 | if (g_blockEventsOnDrag) return; |
| 49 | |
| 50 | wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() ); |
| 51 | int n = choice->GetSelection(); |
| 52 | |
| 53 | event.SetInt( n ); |
| 54 | event.SetString( choice->GetStringSelection() ); |
| 55 | event.SetEventObject(choice); |
| 56 | |
| 57 | if ( choice->HasClientObjectData() ) |
| 58 | event.SetClientObject( choice->GetClientObject(n) ); |
| 59 | else if ( choice->HasClientUntypedData() ) |
| 60 | event.SetClientData( choice->GetClientData(n) ); |
| 61 | |
| 62 | choice->GetEventHandler()->ProcessEvent(event); |
| 63 | } |
| 64 | |
| 65 | //----------------------------------------------------------------------------- |
| 66 | // wxChoice |
| 67 | //----------------------------------------------------------------------------- |
| 68 | |
| 69 | IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl) |
| 70 | |
| 71 | wxChoice::wxChoice() |
| 72 | { |
| 73 | m_strings = (wxSortedArrayString *)NULL; |
| 74 | } |
| 75 | |
| 76 | bool wxChoice::Create( wxWindow *parent, wxWindowID id, |
| 77 | const wxPoint &pos, const wxSize &size, |
| 78 | int n, const wxString choices[], |
| 79 | long style, const wxValidator& validator, const wxString &name ) |
| 80 | { |
| 81 | m_needParent = TRUE; |
| 82 | #if (GTK_MINOR_VERSION > 0) |
| 83 | m_acceptsFocus = TRUE; |
| 84 | #endif |
| 85 | |
| 86 | if (!PreCreation( parent, pos, size ) || |
| 87 | !CreateBase( parent, id, pos, size, style, validator, name )) |
| 88 | { |
| 89 | wxFAIL_MSG( wxT("wxChoice creation failed") ); |
| 90 | return FALSE; |
| 91 | } |
| 92 | |
| 93 | m_widget = gtk_option_menu_new(); |
| 94 | |
| 95 | if ( style & wxCB_SORT ) |
| 96 | { |
| 97 | // if our m_strings != NULL, DoAppend() will check for it and insert |
| 98 | // items in the correct order |
| 99 | m_strings = new wxSortedArrayString; |
| 100 | } |
| 101 | |
| 102 | GtkWidget *menu = gtk_menu_new(); |
| 103 | |
| 104 | for (int i = 0; i < n; i++) |
| 105 | { |
| 106 | GtkAppendHelper(menu, choices[i]); |
| 107 | } |
| 108 | |
| 109 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); |
| 110 | |
| 111 | m_parent->DoAddChild( this ); |
| 112 | |
| 113 | PostCreation(); |
| 114 | |
| 115 | SetFont( parent->GetFont() ); |
| 116 | |
| 117 | SetBestSize(size); |
| 118 | |
| 119 | SetBackgroundColour( parent->GetBackgroundColour() ); |
| 120 | SetForegroundColour( parent->GetForegroundColour() ); |
| 121 | |
| 122 | Show( TRUE ); |
| 123 | |
| 124 | return TRUE; |
| 125 | } |
| 126 | |
| 127 | wxChoice::~wxChoice() |
| 128 | { |
| 129 | Clear(); |
| 130 | |
| 131 | delete m_strings; |
| 132 | } |
| 133 | |
| 134 | int wxChoice::DoAppend( const wxString &item ) |
| 135 | { |
| 136 | wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") ); |
| 137 | |
| 138 | GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ); |
| 139 | |
| 140 | return GtkAppendHelper(menu, item); |
| 141 | } |
| 142 | |
| 143 | void wxChoice::DoSetItemClientData( int n, void* clientData ) |
| 144 | { |
| 145 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") ); |
| 146 | |
| 147 | wxNode *node = m_clientList.Nth( n ); |
| 148 | wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") ); |
| 149 | |
| 150 | node->SetData( (wxObject*) clientData ); |
| 151 | } |
| 152 | |
| 153 | void* wxChoice::DoGetItemClientData( int n ) const |
| 154 | { |
| 155 | wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") ); |
| 156 | |
| 157 | wxNode *node = m_clientList.Nth( n ); |
| 158 | wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") ); |
| 159 | |
| 160 | return node->Data(); |
| 161 | } |
| 162 | |
| 163 | void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData ) |
| 164 | { |
| 165 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") ); |
| 166 | |
| 167 | wxNode *node = m_clientList.Nth( n ); |
| 168 | wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") ); |
| 169 | |
| 170 | wxClientData *cd = (wxClientData*) node->Data(); |
| 171 | delete cd; |
| 172 | |
| 173 | node->SetData( (wxObject*) clientData ); |
| 174 | } |
| 175 | |
| 176 | wxClientData* wxChoice::DoGetItemClientObject( int n ) const |
| 177 | { |
| 178 | wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") ); |
| 179 | |
| 180 | wxNode *node = m_clientList.Nth( n ); |
| 181 | wxCHECK_MSG( node, (wxClientData *)NULL, |
| 182 | wxT("invalid index in wxChoice::DoGetItemClientObject") ); |
| 183 | |
| 184 | return (wxClientData*) node->Data(); |
| 185 | } |
| 186 | |
| 187 | void wxChoice::Clear() |
| 188 | { |
| 189 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); |
| 190 | |
| 191 | gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) ); |
| 192 | GtkWidget *menu = gtk_menu_new(); |
| 193 | gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu ); |
| 194 | |
| 195 | if ( HasClientObjectData() ) |
| 196 | { |
| 197 | // destroy the data (due to Robert's idea of using wxList<wxObject> |
| 198 | // and not wxList<wxClientData> we can't just say |
| 199 | // m_clientList.DeleteContents(TRUE) - this would crash! |
| 200 | wxNode *node = m_clientList.First(); |
| 201 | while ( node ) |
| 202 | { |
| 203 | delete (wxClientData *)node->Data(); |
| 204 | node = node->Next(); |
| 205 | } |
| 206 | } |
| 207 | m_clientList.Clear(); |
| 208 | |
| 209 | if ( m_strings ) |
| 210 | m_strings->Clear(); |
| 211 | } |
| 212 | |
| 213 | void wxChoice::Delete( int WXUNUSED(n) ) |
| 214 | { |
| 215 | wxFAIL_MSG( wxT("wxChoice:Delete not implemented") ); |
| 216 | } |
| 217 | |
| 218 | int wxChoice::FindString( const wxString &string ) const |
| 219 | { |
| 220 | wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") ); |
| 221 | |
| 222 | // If you read this code once and you think you understand |
| 223 | // it, then you are very wrong. Robert Roebling. |
| 224 | |
| 225 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); |
| 226 | int count = 0; |
| 227 | GList *child = menu_shell->children; |
| 228 | while (child) |
| 229 | { |
| 230 | GtkBin *bin = GTK_BIN( child->data ); |
| 231 | GtkLabel *label = (GtkLabel *) NULL; |
| 232 | if (bin->child) label = GTK_LABEL(bin->child); |
| 233 | if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child ); |
| 234 | |
| 235 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); |
| 236 | |
| 237 | if (string == wxString(label->label,*wxConvCurrent)) |
| 238 | return count; |
| 239 | |
| 240 | child = child->next; |
| 241 | count++; |
| 242 | } |
| 243 | |
| 244 | return -1; |
| 245 | } |
| 246 | |
| 247 | int wxChoice::GetSelection() const |
| 248 | { |
| 249 | wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") ); |
| 250 | |
| 251 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); |
| 252 | int count = 0; |
| 253 | GList *child = menu_shell->children; |
| 254 | while (child) |
| 255 | { |
| 256 | GtkBin *bin = GTK_BIN( child->data ); |
| 257 | if (!bin->child) return count; |
| 258 | child = child->next; |
| 259 | count++; |
| 260 | } |
| 261 | |
| 262 | return -1; |
| 263 | } |
| 264 | |
| 265 | void wxChoice::SetString( int WXUNUSED(n), const wxString& WXUNUSED(string) ) |
| 266 | { |
| 267 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); |
| 268 | |
| 269 | wxFAIL_MSG(wxT("not implemented")); |
| 270 | } |
| 271 | |
| 272 | wxString wxChoice::GetString( int n ) const |
| 273 | { |
| 274 | wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") ); |
| 275 | |
| 276 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); |
| 277 | int count = 0; |
| 278 | GList *child = menu_shell->children; |
| 279 | while (child) |
| 280 | { |
| 281 | GtkBin *bin = GTK_BIN( child->data ); |
| 282 | if (count == n) |
| 283 | { |
| 284 | GtkLabel *label = (GtkLabel *) NULL; |
| 285 | if (bin->child) label = GTK_LABEL(bin->child); |
| 286 | if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child ); |
| 287 | |
| 288 | wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") ); |
| 289 | |
| 290 | return wxString(label->label,*wxConvCurrent); |
| 291 | } |
| 292 | child = child->next; |
| 293 | count++; |
| 294 | } |
| 295 | |
| 296 | wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") ); |
| 297 | |
| 298 | return wxT(""); |
| 299 | } |
| 300 | |
| 301 | int wxChoice::GetCount() const |
| 302 | { |
| 303 | wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") ); |
| 304 | |
| 305 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); |
| 306 | int count = 0; |
| 307 | GList *child = menu_shell->children; |
| 308 | while (child) |
| 309 | { |
| 310 | count++; |
| 311 | child = child->next; |
| 312 | } |
| 313 | return count; |
| 314 | } |
| 315 | |
| 316 | void wxChoice::SetSelection( int n ) |
| 317 | { |
| 318 | wxCHECK_RET( m_widget != NULL, wxT("invalid choice") ); |
| 319 | |
| 320 | int tmp = n; |
| 321 | gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp ); |
| 322 | } |
| 323 | |
| 324 | void wxChoice::ApplyWidgetStyle() |
| 325 | { |
| 326 | SetWidgetStyle(); |
| 327 | |
| 328 | GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) ); |
| 329 | |
| 330 | gtk_widget_set_style( m_widget, m_widgetStyle ); |
| 331 | gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle ); |
| 332 | |
| 333 | GList *child = menu_shell->children; |
| 334 | while (child) |
| 335 | { |
| 336 | gtk_widget_set_style( GTK_WIDGET( child->data ), m_widgetStyle ); |
| 337 | |
| 338 | GtkBin *bin = GTK_BIN( child->data ); |
| 339 | GtkWidget *label = (GtkWidget *) NULL; |
| 340 | if (bin->child) label = bin->child; |
| 341 | if (!label) label = GTK_BUTTON(m_widget)->child; |
| 342 | |
| 343 | gtk_widget_set_style( label, m_widgetStyle ); |
| 344 | |
| 345 | child = child->next; |
| 346 | } |
| 347 | } |
| 348 | |
| 349 | size_t wxChoice::GtkAppendHelper(GtkWidget *menu, const wxString& item) |
| 350 | { |
| 351 | GtkWidget *menu_item = gtk_menu_item_new_with_label( item.mbc_str() ); |
| 352 | |
| 353 | size_t index; |
| 354 | if ( m_strings ) |
| 355 | { |
| 356 | // sorted control, need to insert at the correct index |
| 357 | index = m_strings->Add(item); |
| 358 | |
| 359 | gtk_menu_insert( GTK_MENU(menu), menu_item, index ); |
| 360 | |
| 361 | if ( index ) |
| 362 | { |
| 363 | m_clientList.Insert( m_clientList.Item(index - 1), |
| 364 | (wxObject*) NULL ); |
| 365 | } |
| 366 | else |
| 367 | { |
| 368 | m_clientList.Insert( (wxObject*) NULL ); |
| 369 | } |
| 370 | } |
| 371 | else |
| 372 | { |
| 373 | // normal control, just append |
| 374 | gtk_menu_append( GTK_MENU(menu), menu_item ); |
| 375 | |
| 376 | m_clientList.Append( (wxObject*) NULL ); |
| 377 | |
| 378 | // don't call wxChoice::GetCount() from here because it doesn't work |
| 379 | // if we're called from ctor (and GtkMenuShell is still NULL) |
| 380 | index = m_clientList.GetCount() - 1; |
| 381 | } |
| 382 | |
| 383 | if (GTK_WIDGET_REALIZED(m_widget)) |
| 384 | { |
| 385 | gtk_widget_realize( menu_item ); |
| 386 | gtk_widget_realize( GTK_BIN(menu_item)->child ); |
| 387 | |
| 388 | if (m_widgetStyle) ApplyWidgetStyle(); |
| 389 | } |
| 390 | |
| 391 | gtk_signal_connect( GTK_OBJECT( menu_item ), "activate", |
| 392 | GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this ); |
| 393 | |
| 394 | gtk_widget_show( menu_item ); |
| 395 | |
| 396 | // return the index of the item in the control |
| 397 | return index; |
| 398 | } |
| 399 | |
| 400 | wxSize wxChoice::DoGetBestSize() const |
| 401 | { |
| 402 | wxSize ret( wxControl::DoGetBestSize() ); |
| 403 | |
| 404 | // we know better our horizontal extent: it depends on the longest string |
| 405 | // we have |
| 406 | ret.x = 0; |
| 407 | if ( m_widget ) |
| 408 | { |
| 409 | GdkFont *font = m_font.GetInternalFont(); |
| 410 | |
| 411 | wxCoord width; |
| 412 | size_t count = GetCount(); |
| 413 | for ( size_t n = 0; n < count; n++ ) |
| 414 | { |
| 415 | width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str()); |
| 416 | if ( width > ret.x ) |
| 417 | ret.x = width; |
| 418 | } |
| 419 | |
| 420 | // add extra for the choice "=" button |
| 421 | |
| 422 | // VZ: I don't know how to get the right value, it seems to be in |
| 423 | // GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get |
| 424 | // to it - maybe we can use gtk_option_menu_size_request() for this |
| 425 | // somehow? |
| 426 | // |
| 427 | // This default value works only for the default GTK+ theme (i.e. |
| 428 | // no theme at all) (FIXME) |
| 429 | static const int widthChoiceIndicator = 35; |
| 430 | ret.x += widthChoiceIndicator; |
| 431 | } |
| 432 | |
| 433 | // but not less than the minimal width |
| 434 | if ( ret.x < 80 ) |
| 435 | ret.x = 80; |
| 436 | |
| 437 | ret.y = 16 + gdk_char_height( m_widget->style->font, 'H' ); |
| 438 | return ret; |
| 439 | } |
| 440 | |
| 441 | #endif // wxUSE_CHOICE |
| 442 | |