src/gtk/combobox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        combobox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Id:          $Id$
   6 // Copyright:   (c) 1998 Robert Roebling
   7 // Licence:     wxWindows licence
   8 /////////////////////////////////////////////////////////////////////////////
   9
  10 #ifdef __GNUG__
  11 #pragma implementation "combobox.h"
  12 #endif
  13
  14 #include "wx/combobox.h"
  15
  16 #if wxUSE_COMBOBOX
  17
  18 #include "wx/settings.h"
  19 #include "wx/intl.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 // "select"
  39 //-----------------------------------------------------------------------------
  40
  41 static void
  42 gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  43 {
  44     if (g_isIdle) wxapp_install_idle_handler();
  45
  46     if (!combo->m_hasVMT) return;
  47
  48     if (g_blockEventsOnDrag) return;
  49
  50     if (combo->m_alreadySent)
  51     {
  52         combo->m_alreadySent = FALSE;
  53         return;
  54     }
  55
  56     combo->m_alreadySent = TRUE;
  57
  58     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
  59     event.SetInt( combo->GetSelection() );
  60     event.SetString( combo->GetStringSelection() );
  61     event.SetEventObject( combo );
  62
  63     combo->GetEventHandler()->ProcessEvent( event );
  64 }
  65
  66 //-----------------------------------------------------------------------------
  67 //  "changed"
  68 //-----------------------------------------------------------------------------
  69
  70 static void
  71 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
  72 {
  73     if (g_isIdle) wxapp_install_idle_handler();
  74
  75     if (!combo->m_hasVMT) return;
  76
  77     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
  78     event.SetString( combo->GetValue() );
  79     event.SetEventObject( combo );
  80     combo->GetEventHandler()->ProcessEvent( event );
  81 }
  82
  83 //-----------------------------------------------------------------------------
  84 // wxComboBox
  85 //-----------------------------------------------------------------------------
  86
  87 IMPLEMENT_DYNAMIC_CLASS(wxComboBox,wxControl)
  88
  89 BEGIN_EVENT_TABLE(wxComboBox, wxControl)
  90     EVT_SIZE(wxComboBox::OnSize)
  91     EVT_CHAR(wxComboBox::OnChar)
  92 END_EVENT_TABLE()
  93
  94 bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
  95                          const wxPoint& pos, const wxSize& size,
  96                          int n, const wxString choices[],
  97                          long style, const wxValidator& validator,
  98                          const wxString& name )
  99 {
 100     m_alreadySent = FALSE;
 101     m_needParent = TRUE;
 102     m_acceptsFocus = TRUE;
 103
 104     if (!PreCreation( parent, pos, size ) ||
 105         !CreateBase( parent, id, pos, size, style, validator, name ))
 106     {
 107         wxFAIL_MSG( _T("wxComboBox creation failed") );
 108         return FALSE;
 109     }
 110
 111     m_widget = gtk_combo_new();
 112
 113     // make it more useable
 114     gtk_combo_set_use_arrows_always(GTK_COMBO(m_widget), TRUE);
 115
 116     wxSize newSize = size;
 117     if (newSize.x == -1)
 118         newSize.x = 100;
 119     if (newSize.y == -1)
 120         newSize.y = 26;
 121     SetSize( newSize.x, newSize.y );
 122
 123     GtkWidget *list = GTK_COMBO(m_widget)->list;
 124
 125     for (int i = 0; i < n; i++)
 126     {
 127         /* don't send first event, which GTK sends aways when
 128            inserting the first item */
 129         m_alreadySent = TRUE;
 130
 131         GtkWidget *list_item = gtk_list_item_new_with_label( choices[i].mbc_str() );
 132
 133         m_clientDataList.Append( (wxObject*)NULL );
 134         m_clientObjectList.Append( (wxObject*)NULL );
 135
 136         gtk_container_add( GTK_CONTAINER(list), list_item );
 137
 138         gtk_signal_connect( GTK_OBJECT(list_item), "select",
 139            GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 140
 141         gtk_widget_show( list_item );
 142     }
 143
 144     m_parent->DoAddChild( this );
 145
 146     PostCreation();
 147
 148     ConnectWidget( GTK_COMBO(m_widget)->button );
 149
 150     if (!value.IsNull()) SetValue( value );
 151
 152     if (style & wxCB_READONLY)
 153         gtk_entry_set_editable( GTK_ENTRY( GTK_COMBO(m_widget)->entry ), FALSE );
 154
 155     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
 156       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 157
 158     SetBackgroundColour( wxSystemSettings::GetSystemColour( wxSYS_COLOUR_WINDOW ) );
 159     SetForegroundColour( parent->GetForegroundColour() );
 160     SetFont( parent->GetFont() );
 161
 162     Show( TRUE );
 163
 164     return TRUE;
 165 }
 166
 167 wxComboBox::~wxComboBox()
 168 {
 169     wxNode *node = m_clientObjectList.First();
 170     while (node)
 171     {
 172         wxClientData *cd = (wxClientData*)node->Data();
 173         if (cd) delete cd;
 174         node = node->Next();
 175     }
 176     m_clientObjectList.Clear();
 177
 178     m_clientDataList.Clear();
 179 }
 180
 181 void wxComboBox::AppendCommon( const wxString &item )
 182 {
 183     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 184
 185     GtkWidget *list = GTK_COMBO(m_widget)->list;
 186
 187     GtkWidget *list_item = gtk_list_item_new_with_label( item.mbc_str() );
 188
 189     gtk_container_add( GTK_CONTAINER(list), list_item );
 190
 191     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 192       GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 193
 194     if (GTK_WIDGET_REALIZED(m_widget))
 195     {
 196         gtk_widget_realize( list_item );
 197         gtk_widget_realize( GTK_BIN(list_item)->child );
 198
 199         if (m_widgetStyle) ApplyWidgetStyle();
 200     }
 201
 202     gtk_widget_show( list_item );
 203 }
 204
 205 void wxComboBox::Append( const wxString &item )
 206 {
 207     m_clientDataList.Append( (wxObject*) NULL );
 208     m_clientObjectList.Append( (wxObject*) NULL );
 209
 210     AppendCommon( item );
 211 }
 212
 213 void wxComboBox::Append( const wxString &item, void *clientData )
 214 {
 215     m_clientDataList.Append( (wxObject*) clientData );
 216     m_clientObjectList.Append( (wxObject*)NULL );
 217
 218     AppendCommon( item );
 219 }
 220
 221 void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 222 {
 223     m_clientDataList.Append( (wxObject*) NULL );
 224     m_clientObjectList.Append( (wxObject*) clientData );
 225
 226     AppendCommon( item );
 227 }
 228
 229 void wxComboBox::SetClientData( int n, void* clientData )
 230 {
 231     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 232
 233     wxNode *node = m_clientDataList.Nth( n );
 234     if (!node) return;
 235
 236     node->SetData( (wxObject*) clientData );
 237 }
 238
 239 void* wxComboBox::GetClientData( int n )
 240 {
 241     wxCHECK_MSG( m_widget != NULL, NULL, _T("invalid combobox") );
 242
 243     wxNode *node = m_clientDataList.Nth( n );
 244     if (!node) return NULL;
 245
 246     return node->Data();
 247 }
 248
 249 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 250 {
 251     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 252
 253     wxNode *node = m_clientObjectList.Nth( n );
 254     if (!node) return;
 255
 256     wxClientData *cd = (wxClientData*) node->Data();
 257     if (cd) delete cd;
 258
 259     node->SetData( (wxObject*) clientData );
 260 }
 261
 262 wxClientData* wxComboBox::GetClientObject( int n )
 263 {
 264     wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, _T("invalid combobox") );
 265
 266     wxNode *node = m_clientDataList.Nth( n );
 267     if (!node) return (wxClientData*) NULL;
 268
 269     return (wxClientData*) node->Data();
 270 }
 271
 272 void wxComboBox::Clear()
 273 {
 274     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 275
 276     GtkWidget *list = GTK_COMBO(m_widget)->list;
 277     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
 278
 279     wxNode *node = m_clientObjectList.First();
 280     while (node)
 281     {
 282         wxClientData *cd = (wxClientData*)node->Data();
 283         if (cd) delete cd;
 284         node = node->Next();
 285     }
 286     m_clientObjectList.Clear();
 287
 288     m_clientDataList.Clear();
 289 }
 290
 291 void wxComboBox::Delete( int n )
 292 {
 293     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 294
 295     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 296
 297     GList *child = g_list_nth( listbox->children, n );
 298
 299     if (!child)
 300     {
 301         wxFAIL_MSG(_T("wrong index"));
 302         return;
 303     }
 304
 305     GList *list = g_list_append( (GList*) NULL, child->data );
 306     gtk_list_remove_items( listbox, list );
 307     g_list_free( list );
 308
 309     wxNode *node = m_clientObjectList.Nth( n );
 310     if (node)
 311     {
 312         wxClientData *cd = (wxClientData*)node->Data();
 313         if (cd) delete cd;
 314         m_clientObjectList.DeleteNode( node );
 315     }
 316
 317     node = m_clientDataList.Nth( n );
 318     if (node)
 319     {
 320         m_clientDataList.DeleteNode( node );
 321     }
 322 }
 323
 324 int wxComboBox::FindString( const wxString &item )
 325 {
 326     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid combobox") );
 327
 328     GtkWidget *list = GTK_COMBO(m_widget)->list;
 329
 330     GList *child = GTK_LIST(list)->children;
 331     int count = 0;
 332     while (child)
 333     {
 334         GtkBin *bin = GTK_BIN( child->data );
 335         GtkLabel *label = GTK_LABEL( bin->child );
 336         if (item == wxString(label->label,*wxConvCurrent))
 337             return count;
 338         count++;
 339         child = child->next;
 340     }
 341
 342     return wxNOT_FOUND;
 343 }
 344
 345 int wxComboBox::GetSelection() const
 346 {
 347     wxCHECK_MSG( m_widget != NULL, -1, _T("invalid combobox") );
 348
 349     GtkWidget *list = GTK_COMBO(m_widget)->list;
 350
 351     GList *selection = GTK_LIST(list)->selection;
 352     if (selection)
 353     {
 354         GList *child = GTK_LIST(list)->children;
 355         int count = 0;
 356         while (child)
 357         {
 358             if (child->data == selection->data) return count;
 359             count++;
 360             child = child->next;
 361         }
 362     }
 363
 364     return -1;
 365 }
 366
 367 wxString wxComboBox::GetString( int n ) const
 368 {
 369     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid combobox") );
 370
 371     GtkWidget *list = GTK_COMBO(m_widget)->list;
 372
 373     wxString str;
 374     GList *child = g_list_nth( GTK_LIST(list)->children, n );
 375     if (child)
 376     {
 377         GtkBin *bin = GTK_BIN( child->data );
 378         GtkLabel *label = GTK_LABEL( bin->child );
 379         str = wxString(label->label,*wxConvCurrent);
 380     }
 381     else
 382     {
 383         wxFAIL_MSG( _T("wxComboBox: wrong index") );
 384     }
 385
 386     return str;
 387 }
 388
 389 wxString wxComboBox::GetStringSelection() const
 390 {
 391     wxCHECK_MSG( m_widget != NULL, _T(""), _T("invalid combobox") );
 392
 393     GtkWidget *list = GTK_COMBO(m_widget)->list;
 394
 395     GList *selection = GTK_LIST(list)->selection;
 396     if (selection)
 397     {
 398         GtkBin *bin = GTK_BIN( selection->data );
 399         wxString tmp = wxString(GTK_LABEL( bin->child )->label,*wxConvCurrent);
 400         return tmp;
 401     }
 402
 403     wxFAIL_MSG( _T("wxComboBox: no selection") );
 404
 405     return _T("");
 406 }
 407
 408 int wxComboBox::Number() const
 409 {
 410     wxCHECK_MSG( m_widget != NULL, 0, _T("invalid combobox") );
 411
 412     GtkWidget *list = GTK_COMBO(m_widget)->list;
 413
 414     GList *child = GTK_LIST(list)->children;
 415     int count = 0;
 416     while (child) { count++; child = child->next; }
 417     return count;
 418 }
 419
 420 void wxComboBox::SetSelection( int n )
 421 {
 422     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 423
 424     DisableEvents();
 425
 426     GtkWidget *list = GTK_COMBO(m_widget)->list;
 427     gtk_list_select_item( GTK_LIST(list), n );
 428
 429     EnableEvents();
 430 }
 431
 432 void wxComboBox::SetStringSelection( const wxString &string )
 433 {
 434     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 435
 436     int res = FindString( string );
 437     if (res == -1) return;
 438     SetSelection( res );
 439 }
 440
 441 wxString wxComboBox::GetValue() const
 442 {
 443     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 444     wxString tmp = wxString(gtk_entry_get_text( GTK_ENTRY(entry) ),*wxConvCurrent);
 445     return tmp;
 446 }
 447
 448 void wxComboBox::SetValue( const wxString& value )
 449 {
 450     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 451
 452     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 453     wxString tmp = _T("");
 454     if (!value.IsNull()) tmp = value;
 455     gtk_entry_set_text( GTK_ENTRY(entry), tmp.mbc_str() );
 456 }
 457
 458 void wxComboBox::Copy()
 459 {
 460     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 461
 462     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 463 #if (GTK_MINOR_VERSION > 0)
 464     gtk_editable_copy_clipboard( GTK_EDITABLE(entry) );
 465 #else
 466     gtk_editable_copy_clipboard( GTK_EDITABLE(entry), 0 );
 467 #endif
 468 }
 469
 470 void wxComboBox::Cut()
 471 {
 472     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 473
 474     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 475 #if (GTK_MINOR_VERSION > 0)
 476     gtk_editable_cut_clipboard( GTK_EDITABLE(entry) );
 477 #else
 478     gtk_editable_cut_clipboard( GTK_EDITABLE(entry), 0 );
 479 #endif
 480 }
 481
 482 void wxComboBox::Paste()
 483 {
 484     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 485
 486     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 487 #if (GTK_MINOR_VERSION > 0)
 488     gtk_editable_paste_clipboard( GTK_EDITABLE(entry) );
 489 #else
 490     gtk_editable_paste_clipboard( GTK_EDITABLE(entry), 0 );
 491 #endif
 492 }
 493
 494 void wxComboBox::SetInsertionPoint( long pos )
 495 {
 496     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 497
 498     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 499     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
 500 }
 501
 502 void wxComboBox::SetInsertionPointEnd()
 503 {
 504     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 505
 506     SetInsertionPoint( -1 );
 507 }
 508
 509 long wxComboBox::GetInsertionPoint() const
 510 {
 511     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 512     return (long) GTK_EDITABLE(entry)->current_pos;
 513 }
 514
 515 long wxComboBox::GetLastPosition() const
 516 {
 517     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 518     int pos = GTK_ENTRY(entry)->text_length;
 519     return (long) pos-1;
 520 }
 521
 522 void wxComboBox::Replace( long from, long to, const wxString& value )
 523 {
 524     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 525     // FIXME: not quite sure how to do this method right in multibyte mode
 526
 527     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 528     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 529     if (value.IsNull()) return;
 530     gint pos = (gint)to;
 531     gtk_editable_insert_text( GTK_EDITABLE(entry), value.mbc_str(), value.Length(), &pos );
 532 }
 533
 534 void wxComboBox::Remove(long from, long to)
 535 {
 536     wxCHECK_RET( m_widget != NULL, _T("invalid combobox") );
 537
 538     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 539     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
 540 }
 541
 542 void wxComboBox::SetSelection( long from, long to )
 543 {
 544     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 545     gtk_editable_select_region( GTK_EDITABLE(entry), (gint)from, (gint)to );
 546 }
 547
 548 void wxComboBox::SetEditable( bool editable )
 549 {
 550     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
 551     gtk_entry_set_editable( GTK_ENTRY(entry), editable );
 552 }
 553
 554 void wxComboBox::OnChar( wxKeyEvent &event )
 555 {
 556     if ( event.KeyCode() == WXK_RETURN )
 557     {
 558         wxString value = GetValue();
 559
 560         if ( Number() == 0 )
 561         {
 562             // make Enter generate "selected" event if there is only one item
 563             // in the combobox - without it, it's impossible to select it at
 564             // all!
 565             wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 566             event.SetInt( 0 );
 567             event.SetString( value );
 568             event.SetEventObject( this );
 569             GetEventHandler()->ProcessEvent( event );
 570         }
 571         else
 572         {
 573             // add the item to the list if it's not there yet
 574             if ( FindString(value) == wxNOT_FOUND )
 575             {
 576                 Append(value);
 577
 578                 // and generate the selected event for it
 579                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
 580                 event.SetInt( Number() - 1 );
 581                 event.SetString( value );
 582                 event.SetEventObject( this );
 583                 GetEventHandler()->ProcessEvent( event );
 584             }
 585             //else: do nothing, this will open the listbox
 586         }
 587     }
 588
 589     event.Skip();
 590 }
 591
 592 void wxComboBox::DisableEvents()
 593 {
 594     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 595     GList *child = list->children;
 596     while (child)
 597     {
 598         gtk_signal_disconnect_by_func( GTK_OBJECT(child->data),
 599           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 600
 601         child = child->next;
 602     }
 603 }
 604
 605 void wxComboBox::EnableEvents()
 606 {
 607     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 608     GList *child = list->children;
 609     while (child)
 610     {
 611         gtk_signal_connect( GTK_OBJECT(child->data), "select",
 612           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 613
 614         child = child->next;
 615     }
 616 }
 617
 618 void wxComboBox::OnSize( wxSizeEvent &event )
 619 {
 620     event.Skip();
 621
 622     return;
 623
 624     int w = 21;
 625     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 626
 627     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
 628     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
 629 }
 630
 631 void wxComboBox::ApplyWidgetStyle()
 632 {
 633     SetWidgetStyle();
 634
 635 //    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
 636     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
 637     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 638
 639     GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
 640     GList *child = list->children;
 641     while (child)
 642     {
 643         gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 644
 645         GtkBin *bin = GTK_BIN(child->data);
 646         gtk_widget_set_style( bin->child, m_widgetStyle );
 647
 648         child = child->next;
 649     }
 650 }
 651
 652 GtkWidget* wxComboBox::GetConnectWidget()
 653 {
 654     return GTK_COMBO(m_widget)->entry;
 655 }
 656
 657 bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
 658 {
 659     return ( (window == GTK_ENTRY( GTK_COMBO(m_widget)->entry )->text_area) ||
 660              (window == GTK_COMBO(m_widget)->button->window ) );
 661 }
 662
 663 #endif