src/gtk/listbox.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        listbox.cpp
   3 // Purpose:
   4 // Author:      Robert Roebling
   5 // Created:     01/02/97
   6 // Id:
   7 // Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
   8 // Licence:     wxWindows licence
   9 /////////////////////////////////////////////////////////////////////////////
  10
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "listbox.h"
  14 #endif
  15
  16 #include "wx/dynarray.h"
  17 #include "wx/listbox.h"
  18 #include "wx/utils.h"
  19
  20 //-----------------------------------------------------------------------------
  21 // data
  22 //-----------------------------------------------------------------------------
  23
  24 extern bool   g_blockEventsOnDrag;
  25
  26 //-----------------------------------------------------------------------------
  27 // wxListBox
  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
  61 IMPLEMENT_DYNAMIC_CLASS(wxListBox,wxControl)
  62
  63 wxListBox::wxListBox(void)
  64 {
  65   m_list = NULL;
  66 };
  67
  68 wxListBox::wxListBox( wxWindow *parent, wxWindowID id,
  69       const wxPoint &pos, const wxSize &size,
  70       int n, const wxString choices[],
  71       long style, const wxString &name )
  72 {
  73   Create( parent, id, pos, size, n, choices, style, name );
  74 };
  75
  76 bool wxListBox::Create( wxWindow *parent, wxWindowID id,
  77       const wxPoint &pos, const wxSize &size,
  78       int n, const wxString choices[],
  79       long style, const wxString &name )
  80 {
  81   m_needParent = TRUE;
  82
  83   PreCreation( parent, id, pos, size, style, name );
  84
  85   m_widget = gtk_scrolled_window_new( NULL, NULL );
  86   gtk_scrolled_window_set_policy( GTK_SCROLLED_WINDOW(m_widget),
  87     GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC );
  88
  89   m_list = GTK_LIST( gtk_list_new() );
  90
  91   // @@ what's the difference between BROWSE and SINGLE?
  92   GtkSelectionMode mode = GTK_SELECTION_BROWSE;
  93   if ( style & wxLB_MULTIPLE )
  94     mode = GTK_SELECTION_MULTIPLE;
  95   else if ( style & wxLB_EXTENDED )
  96     mode = GTK_SELECTION_EXTENDED;
  97
  98   gtk_list_set_selection_mode( GTK_LIST(m_list), mode );
  99
 100   gtk_container_add (GTK_CONTAINER(m_widget), GTK_WIDGET(m_list) );
 101   gtk_widget_show( GTK_WIDGET(m_list) );
 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     m_clientData.Append( (wxObject*)NULL );
 118
 119     gtk_widget_show( list_item );
 120   };
 121
 122   PostCreation();
 123
 124   gtk_widget_realize( GTK_WIDGET(m_list) );
 125
 126   Show( TRUE );
 127
 128   return TRUE;
 129 };
 130
 131 void wxListBox::Append( const wxString &item )
 132 {
 133   Append( item, (char*)NULL );
 134 };
 135
 136 void wxListBox::Append( const wxString &item, char *clientData )
 137 {
 138   GtkWidget *list_item;
 139   list_item = gtk_list_item_new_with_label( item );
 140
 141   gtk_signal_connect( GTK_OBJECT(list_item), "select",
 142     GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 143
 144   if ( GetWindowStyleFlag() & wxLB_MULTIPLE )
 145     gtk_signal_connect( GTK_OBJECT(list_item), "deselect",
 146       GTK_SIGNAL_FUNC(gtk_listitem_select_callback), (gpointer)this );
 147
 148   gtk_container_add( GTK_CONTAINER(m_list), list_item );
 149
 150   m_clientData.Append( (wxObject*)clientData );
 151
 152   gtk_widget_show( list_item );
 153 };
 154
 155 void wxListBox::Clear(void)
 156 {
 157   gtk_list_clear_items( m_list, 0, Number() );
 158
 159   m_clientData.Clear();
 160 };
 161
 162 void wxListBox::Delete( int n )
 163 {
 164   gtk_list_clear_items( m_list, n, n );
 165
 166   wxNode *node = m_clientData.Nth( n );
 167   if (!node)
 168   {
 169     wxFAIL_MSG("wxListBox::Delete wrong index");
 170   }
 171   else
 172     m_clientData.DeleteNode( node );
 173 };
 174
 175 void wxListBox::Deselect( int n )
 176 {
 177   gtk_list_unselect_item( m_list, n );
 178 };
 179
 180 int wxListBox::FindString( const wxString &item ) const
 181 {
 182   GList *child = m_list->children;
 183   int count = 0;
 184   while (child)
 185   {
 186     GtkBin *bin = GTK_BIN( child->data );
 187     GtkLabel *label = GTK_LABEL( bin->child );
 188     if (item == label->label) return count;
 189     count++;
 190     child = child->next;
 191   };
 192   return -1;
 193 };
 194
 195 char *wxListBox::GetClientData( int n ) const
 196 {
 197   wxNode *node = m_clientData.Nth( n );
 198   if (node) return ((char*)node->Data());
 199   return NULL;
 200 };
 201
 202 int wxListBox::GetSelection(void) const
 203 {
 204   GList *selection = m_list->selection;
 205   if (selection)
 206   {
 207     GList *child = m_list->children;
 208     int count = 0;
 209     while (child)
 210     {
 211       if (child->data == selection->data) return count;
 212       count++;
 213       child = child->next;
 214     };
 215   };
 216   return -1;
 217 };
 218
 219 int wxListBox::GetSelections(wxArrayInt& aSelections) const
 220 {
 221   // get the number of selected items first
 222   GList *child = m_list->children;
 223   int count = 0;
 224   for ( child = m_list->children; child != NULL; child = child->next ) {
 225     if ( GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED )
 226       count++;
 227   }
 228
 229   aSelections.Empty();
 230
 231   if ( count > 0 ) {
 232     // now fill the list
 233     aSelections.Alloc(count); // optimization attempt
 234     int i = 0;
 235     for ( child = m_list->children; child != NULL; child = child->next, i++ ) {
 236       if ( GTK_WIDGET(child->data)->state == GTK_STATE_SELECTED )
 237         aSelections.Add(i);
 238     }
 239   }
 240
 241   return count;
 242 };
 243
 244 wxString wxListBox::GetString( int n ) const
 245 {
 246   GList *child = g_list_nth( m_list->children, n );
 247   if (child)
 248   {
 249     GtkBin *bin = GTK_BIN( child->data );
 250     GtkLabel *label = GTK_LABEL( bin->child );
 251     return label->label;
 252   };
 253   return "";
 254 };
 255
 256 wxString wxListBox::GetStringSelection(void) const
 257 {
 258   GList *selection = m_list->selection;
 259   if (selection)
 260   {
 261     GtkBin *bin = GTK_BIN( selection->data );
 262     wxString tmp = GTK_LABEL( bin->child )->label;
 263     return tmp;
 264   };
 265   return "";
 266 };
 267
 268 int wxListBox::Number(void)
 269 {
 270   GList *child = m_list->children;
 271   int count = 0;
 272   while (child) { count++; child = child->next; };
 273   return count;
 274 };
 275
 276 bool wxListBox::Selected( int n )
 277 {
 278   GList *target = g_list_nth( m_list->children, n );
 279   if (target)
 280   {
 281     GList *child = m_list->selection;
 282     while (child)
 283     {
 284       if (child->data == target->data) return TRUE;
 285       child = child->next;
 286     };
 287   };
 288   return FALSE;
 289 };
 290
 291 void wxListBox::Set( int WXUNUSED(n), const wxString *WXUNUSED(choices) )
 292 {
 293 };
 294
 295 void wxListBox::SetClientData( int n, char *clientData )
 296 {
 297   wxNode *node = m_clientData.Nth( n );
 298   if (node) node->SetData( (wxObject*)clientData );
 299 };
 300
 301 void wxListBox::SetFirstItem( int WXUNUSED(n) )
 302 {
 303 };
 304
 305 void wxListBox::SetFirstItem( const wxString &WXUNUSED(item) )
 306 {
 307 };
 308
 309 void wxListBox::SetSelection( int n, bool select )
 310 {
 311   if (select)
 312     gtk_list_select_item( m_list, n );
 313   else
 314     gtk_list_unselect_item( m_list, n );
 315 };
 316
 317 void wxListBox::SetString( int n, const wxString &string )
 318 {
 319   GList *child = g_list_nth( m_list->children, n );
 320   if (child)
 321   {
 322     GtkBin *bin = GTK_BIN( child->data );
 323     GtkLabel *label = GTK_LABEL( bin->child );
 324     gtk_label_set( label, string );
 325   };
 326 };
 327
 328 void wxListBox::SetStringSelection( const wxString &string, bool select )
 329 {
 330   SetSelection( FindString(string), select );
 331 };
 332
 333 int wxListBox::GetIndex( GtkWidget *item ) const
 334 {
 335   if (item)
 336   {
 337     GList *child = m_list->children;
 338     int count = 0;
 339     while (child)
 340     {
 341       if (GTK_WIDGET(child->data) == item) return count;
 342       count++;
 343       child = child->next;
 344     };
 345   };
 346   return -1;
 347 };
 348
 349 GtkWidget *wxListBox::GetDropTargetWidget(void)
 350 {
 351   return GTK_WIDGET(m_list);
 352 };
 353
 354
 355