src/gtk/listbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        listbox.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 "listbox.h"
  13 #endif
  14
  15 #include "wx/dynarray.h"
  16 #include "wx/listbox.h"
  17 #include "wx/utils.h"
  18 #include <wx/intl.h>
  19
  20 //-----------------------------------------------------------------------------
  21 // data
  22 //-----------------------------------------------------------------------------
  23
  24 extern bool   g_blockEventsOnDrag;
  25
  26 //-----------------------------------------------------------------------------
  27 // "select" and "deselect"
  28 //-----------------------------------------------------------------------------
  29
  30 static void gtk_listitem_select_callback( GtkWidget *WXUNUSED(widget), wxListBox *listbox )
  31 {
  32   if (!listbox->HasVMT()) return;
  33   if (g_blockEventsOnDrag) return;
  34
  35   wxCommandEvent event(wxEVT_COMMAND_LISTBOX_SELECTED, listbox->GetId() );
  36
  37     wxArrayInt aSelections;
  38     int count = listbox->GetSelections(aSelections);
  39     if ( count > 0 )
  40     {
  41       event.m_commandInt = aSelections[0] ;
  42       event.m_clientData = listbox->GetClientData(event.m_commandInt);
  43       wxString str(listbox->GetString(event.m_commandInt));
  44       if (str != "")
  45         event.m_commandString = copystring((char *)(const char *)str);
  46     }
  47     else
  48     {
  49       event.m_commandInt = -1 ;
  50       event.m_commandString = copystring("") ;
  51     }
  52
  53   event.SetEventObject( listbox );
  54
  55   listbox->GetEventHandler()->ProcessEvent( event );
  56   if (event.m_commandString) delete[] event.m_commandString ;
  57 }
  58
  59 //-----------------------------------------------------------------------------
  60 // wxListBox
  61 //-----------------------------------------------------------------------------
  62
  63 IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
  64
  65 wxListBox::wxListBox(void)
  66 {
  67   m_list = (GtkList *) NULL;
  68 }
  69
  70 bool wxListBox::Create( wxWindow *parent, wxWindowID id,
  71       const wxPoint &pos, const wxSize &size,
  72       int n, const wxString choices[],
  73       long style, const wxValidator& validator, const wxString &name )
  74 {
  75   m_needParent = TRUE;
  76
  77   PreCreation( parent, id, pos, size, style, name );
  78
  79   SetValidator( validator );
  80
  81   m_widget = gtk_scrolled_window_new( (GtkAdjustment *) NULL, (GtkAdjustment *) NULL );
  82   gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
  83     GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
  84
  85   m_list = GTK_LIST( gtk_list_new() );
  86
  87   GtkSelectionMode mode = GTK_SELECTION_BROWSE;
  88   if (style & wxLB_MULTIPLE)
  89     mode = GTK_SELECTION_MULTIPLE;
  90   else if (style & wxLB_EXTENDED)
  91     mode = GTK_SELECTION_EXTENDED;
  92
  93   gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
  94
  95   gtk_container_add (GTK_CONTAINER(m_widget), GTK_WIDGET(m_list) );
  96   gtk_widget_show( GTK_WIDGET(m_list) );
  97
  98   wxSize newSize = size;
  99   if (newSize.x == -1) newSize.x = 100;
 100   if (newSize.y == -1) newSize.y = 110;
 101   SetSize( newSize.x, newSize.y );
 102
 103   for (int i = 0; i < n; i++)
 104   {
 105     GtkWidget *list_item;
 106     list_item = gtk_list_item_new_with_label( choices[i] );
 107
 108     gtk_container_add( GTK_CONTAINER(m_list), list_item );
 109
 110     gtk_signal_connect( GTK_OBJECT(list_item), "select",
 111       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 112
 113     if (style & wxLB_MULTIPLE)
 114       gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 115         GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 116
 117     ConnectWidget( list_item );
 118
 119     m_clientData.Append( (wxObject*)NULL );
 120
 121     gtk_widget_show( list_item );
 122   }
 123
 124   m_parent->AddChild( this );
 125
 126   (m_parent->m_insertCallback)( m_parent, this );
 127
 128   PostCreation();
 129
 130   gtk_widget_realize( GTK_WIDGET(m_list) );
 131
 132   SetBackgroundColour( parent->GetBackgroundColour() );
 133   SetForegroundColour( parent->GetForegroundColour() );
 134
 135   Show( TRUE );
 136
 137   return TRUE;
 138 }
 139
 140 void wxListBox::Append( const wxString &item )
 141 {
 142   Append( item, (char*)NULL );
 143 }
 144
 145 void wxListBox::Append( const wxString &item, char *clientData )
 146 {
 147   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 148
 149   GtkWidget *list_item = gtk_list_item_new_with_label( item );
 150
 151   gtk_signal_connect( GTK_OBJECT(list_item), "select",
 152     GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 153
 154   if (GetWindowStyleFlag() & wxLB_MULTIPLE)
 155     gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 156       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 157
 158   ConnectWidget( list_item );
 159
 160   m_clientData.Append( (wxObject*)clientData );
 161
 162   gtk_container_add( GTK_CONTAINER(m_list), list_item );
 163
 164   if (m_widgetStyle) ApplyWidgetStyle();
 165
 166   gtk_widget_show( list_item );
 167
 168   ConnectWidget( list_item );
 169
 170   ConnectDnDWidget( list_item );
 171 }
 172
 173 void wxListBox::Clear(void)
 174 {
 175   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 176
 177   gtk_list_clear_items( m_list, 0, Number() );
 178
 179   m_clientData.Clear();
 180 }
 181
 182 void wxListBox::Delete( int n )
 183 {
 184   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 185
 186   GList *child = g_list_nth( m_list->children, n );
 187
 188   if (!child)
 189   {
 190     wxFAIL_MSG("wrong listbox index");
 191     return;
 192   }
 193
 194   GList *list = g_list_append( NULL, child->data );
 195   gtk_list_remove_items( m_list, list );
 196   g_list_free( list );
 197
 198   wxNode *node = m_clientData.Nth( n );
 199   if (!node)
 200   {
 201     wxFAIL_MSG("wrong listbox index");
 202   }
 203   else
 204     m_clientData.DeleteNode( node );
 205 }
 206
 207 void wxListBox::Deselect( int n )
 208 {
 209   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 210
 211   gtk_list_unselect_item( m_list, n );
 212 }
 213
 214 int wxListBox::FindString( const wxString &item ) const
 215 {
 216   wxCHECK_MSG( m_list != NULL, -1, "invalid listbox" );
 217
 218   GList *child = m_list->children;
 219   int count = 0;
 220   while (child)
 221   {
 222     GtkBin *bin = GTK_BIN( child->data );
 223     GtkLabel *label = GTK_LABEL( bin->child );
 224     if (item == label->label) return count;
 225     count++;
 226     child = child->next;
 227   }
 228
 229   // it's not an error if the string is not found - this function may be used to
 230   // test for existence of the string in the listbox, so don't give any
 231   // errors/assert failures.
 232
 233   return -1;
 234 }
 235
 236 char *wxListBox::GetClientData( int n ) const
 237 {
 238   wxCHECK_MSG( m_list != NULL, (char*) NULL, "invalid listbox" );
 239
 240   wxNode *node = m_clientData.Nth( n );
 241   if (node) return ((char*)node->Data());
 242
 243   wxFAIL_MSG("wrong listbox index");
 244   return (char *) NULL;
 245 }
 246
 247 int wxListBox::GetSelection(void) const
 248 {
 249   wxCHECK_MSG( m_list != NULL, -1, "invalid listbox" );
 250
 251   GList *child = m_list->children;
 252   int count = 0;
 253   while (child)
 254   {
 255     if (GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED) return count;
 256     count++;
 257     child = child->next;
 258   }
 259   return -1;
 260 }
 261
 262 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 263 {
 264   wxCHECK_MSG( m_list != NULL, -1, "invalid listbox" );
 265
 266   // get the number of selected items first
 267   GList *child = m_list->children;
 268   int count = 0;
 269   for ( child = m_list->children; child != NULL; child = child->next )
 270   {
 271     if ( GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED )
 272       count++;
 273   }
 274
 275   aSelections.Empty();
 276
 277   if ( count > 0 ) {
 278     // now fill the list
 279     aSelections.Alloc(count); // optimization attempt
 280     int i = 0;
 281     for ( child = m_list->children; child != NULL; child = child->next, i++ )
 282     {
 283       if ( GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED )
 284         aSelections.Add(i);
 285     }
 286   }
 287
 288   return count;
 289 }
 290
 291 wxString wxListBox::GetString( int n ) const
 292 {
 293   wxCHECK_MSG( m_list != NULL, "", "invalid listbox" );
 294
 295   GList *child = g_list_nth( m_list->children, n );
 296   if (child)
 297   {
 298     GtkBin *bin = GTK_BIN( child->data );
 299     GtkLabel *label = GTK_LABEL( bin->child );
 300     return label->label;
 301   }
 302   wxFAIL_MSG("wrong listbox index");
 303   return "";
 304 }
 305
 306 wxString wxListBox::GetStringSelection(void) const
 307 {
 308   wxCHECK_MSG( m_list != NULL, "", "invalid listbox" );
 309
 310   GList *selection = m_list->selection;
 311   if (selection)
 312   {
 313     GtkBin *bin = GTK_BIN( selection->data );
 314     wxString tmp = GTK_LABEL( bin->child )->label;
 315     return tmp;
 316   }
 317   wxFAIL_MSG("no listbox selection available");
 318   return "";
 319 }
 320
 321 int wxListBox::Number(void)
 322 {
 323   wxCHECK_MSG( m_list != NULL, -1, "invalid listbox" );
 324
 325   GList *child = m_list->children;
 326   int count = 0;
 327   while (child) { count++; child = child->next; }
 328   return count;
 329 }
 330
 331 bool wxListBox::Selected( int n )
 332 {
 333   wxCHECK_MSG( m_list != NULL, FALSE, "invalid listbox" );
 334
 335   GList *target = g_list_nth( m_list->children, n );
 336   if (target)
 337   {
 338     GList *child = m_list->selection;
 339     while (child)
 340     {
 341       if (child->data == target->data) return TRUE;
 342       child = child->next;
 343     }
 344   }
 345   wxFAIL_MSG("wrong listbox index");
 346   return FALSE;
 347 }
 348
 349 void wxListBox::Set( int WXUNUSED(n), const wxString *WXUNUSED(choices) )
 350 {
 351   wxFAIL_MSG("wxListBox::Set not implemented");
 352 }
 353
 354 void wxListBox::SetClientData( int n, char *clientData )
 355 {
 356   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 357
 358   wxNode *node = m_clientData.Nth( n );
 359   if (node)
 360   {
 361     node->SetData( (wxObject*)clientData );
 362   }
 363   else
 364   {
 365     wxFAIL_MSG("wrong listbox index");
 366   }
 367 }
 368
 369 void wxListBox::SetFirstItem( int WXUNUSED(n) )
 370 {
 371   wxFAIL_MSG("wxListBox::SetFirstItem not implemented");
 372 }
 373
 374 void wxListBox::SetFirstItem( const wxString &WXUNUSED(item) )
 375 {
 376   wxFAIL_MSG("wxListBox::SetFirstItem not implemented");
 377 }
 378
 379 void wxListBox::SetSelection( int n, bool select )
 380 {
 381   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 382
 383   if (select)
 384     gtk_list_select_item( m_list, n );
 385   else
 386     gtk_list_unselect_item( m_list, n );
 387 }
 388
 389 void wxListBox::SetString( int n, const wxString &string )
 390 {
 391   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 392
 393   GList *child = g_list_nth( m_list->children, n );
 394   if (child)
 395   {
 396     GtkBin *bin = GTK_BIN( child->data );
 397     GtkLabel *label = GTK_LABEL( bin->child );
 398     gtk_label_set( label, string );
 399   }
 400   else
 401   {
 402     wxFAIL_MSG("wrong listbox index");
 403   }
 404 }
 405
 406 void wxListBox::SetStringSelection( const wxString &string, bool select )
 407 {
 408   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 409
 410   SetSelection( FindString(string), select );
 411 }
 412
 413 int wxListBox::GetIndex( GtkWidget *item ) const
 414 {
 415   if (item)
 416   {
 417     GList *child = m_list->children;
 418     int count = 0;
 419     while (child)
 420     {
 421       if (GTK_WIDGET(child->data) == item) return count;
 422       count++;
 423       child = child->next;
 424     }
 425   }
 426   return -1;
 427 }
 428
 429 void wxListBox::SetDropTarget( wxDropTarget *dropTarget )
 430 {
 431   wxCHECK_RET( m_list != NULL, "invalid listbox" );
 432
 433   GList *child = m_list->children;
 434   while (child)
 435   {
 436     DisconnectDnDWidget( GTK_WIDGET( child->data ) );
 437     child = child->next;
 438   }
 439
 440   wxWindow::SetDropTarget( dropTarget  );
 441
 442   child = m_list->children;
 443   while (child)
 444   {
 445     ConnectDnDWidget( GTK_WIDGET( child->data ) );
 446     child = child->next;
 447   }
 448 }
 449
 450 GtkWidget *wxListBox::GetConnectWidget(void)
 451 {
 452   return GTK_WIDGET(m_list);
 453 }
 454
 455 bool wxListBox::IsOwnGtkWindow( GdkWindow *window )
 456 {
 457   if (wxWindow::IsOwnGtkWindow( window )) return TRUE;
 458
 459   GList *child = m_list->children;
 460   while (child)
 461   {
 462     GtkWidget *bin = GTK_WIDGET( child->data );
 463     if (bin->window == window) return TRUE;
 464     child = child->next;
 465   }
 466
 467   return FALSE;
 468 }
 469
 470 void wxListBox::ApplyWidgetStyle()
 471 {
 472   SetWidgetStyle();
 473
 474   GdkWindow *window = GTK_WIDGET(m_list)->window;
 475   m_backgroundColour.CalcPixel( gdk_window_get_colormap( window ) );
 476   gdk_window_set_background( window, m_backgroundColour.GetColor() );
 477   gdk_window_clear( window );
 478
 479   GList *child = m_list->children;
 480   while (child)
 481   {
 482     gtk_widget_set_style( GTK_BIN(child->data)->child, m_widgetStyle );
 483     gtk_widget_set_style( GTK_WIDGET(child->data), m_widgetStyle );
 484     child = child->next;
 485   }
 486 }