src/gtk/choice.cpp

   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 || wxUSE_COMBOBOX
  13
  14 #include "wx/choice.h"
  15
  16 #ifndef WX_PRECOMP
  17     #include "wx/arrstr.h"
  18 #endif
  19
  20 #include "wx/gtk/private.h"
  21
  22
  23 // ----------------------------------------------------------------------------
  24 // GTK callbacks
  25 // ----------------------------------------------------------------------------
  26
  27 extern "C" {
  28
  29 static void
  30 gtk_choice_changed_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
  31 {
  32     choice->SendSelectionChangedEvent(wxEVT_COMMAND_CHOICE_SELECTED);
  33 }
  34
  35 }
  36
  37 //-----------------------------------------------------------------------------
  38 // wxChoice
  39 //-----------------------------------------------------------------------------
  40
  41 IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)
  42
  43 void wxChoice::Init()
  44 {
  45     m_strings = (wxSortedArrayString *)NULL;
  46     m_stringCellIndex = 0;
  47 }
  48
  49 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  50                        const wxPoint &pos, const wxSize &size,
  51                        const wxArrayString& choices,
  52                        long style, const wxValidator& validator,
  53                        const wxString &name )
  54 {
  55     wxCArrayString chs(choices);
  56
  57     return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
  58                    style, validator, name );
  59 }
  60
  61 bool wxChoice::Create( wxWindow *parent, wxWindowID id,
  62                        const wxPoint &pos, const wxSize &size,
  63                        int n, const wxString choices[],
  64                        long style, const wxValidator& validator,
  65                        const wxString &name )
  66 {
  67     if (!PreCreation( parent, pos, size ) ||
  68         !CreateBase( parent, id, pos, size, style, validator, name ))
  69     {
  70         wxFAIL_MSG( wxT("wxChoice creation failed") );
  71         return false;
  72     }
  73
  74     if ( IsSorted() )
  75     {
  76         // if our m_strings != NULL, Append() will check for it and insert
  77         // items in the correct order
  78         m_strings = new wxSortedArrayString;
  79     }
  80
  81     m_widget = gtk_combo_box_new_text();
  82
  83     Append(n, choices);
  84
  85     m_parent->DoAddChild( this );
  86
  87     PostCreation(size);
  88
  89     g_signal_connect_after (m_widget, "changed",
  90                             G_CALLBACK (gtk_choice_changed_callback), this);
  91
  92     return true;
  93 }
  94
  95 wxChoice::~wxChoice()
  96 {
  97     delete m_strings;
  98 }
  99
 100 void wxChoice::SendSelectionChangedEvent(wxEventType evt_type)
 101 {
 102     if (!m_hasVMT)
 103         return;
 104
 105     if (GetSelection() == -1)
 106         return;
 107
 108     wxCommandEvent event( evt_type, GetId() );
 109
 110     int n = GetSelection();
 111     event.SetInt( n );
 112     event.SetString( GetStringSelection() );
 113     event.SetEventObject( this );
 114     InitCommandEventWithItems( event, n );
 115
 116     HandleWindowEvent( event );
 117 }
 118
 119 void wxChoice::GTKInsertComboBoxTextItem( unsigned int n, const wxString& text )
 120 {
 121     gtk_combo_box_insert_text( GTK_COMBO_BOX( m_widget ), n, wxGTK_CONV( text ) );
 122 }
 123
 124 int wxChoice::DoInsertItems(const wxArrayStringsAdapter & items,
 125                             unsigned int pos,
 126                             void **clientData, wxClientDataType type)
 127 {
 128     wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid control") );
 129
 130     wxASSERT_MSG( !IsSorted() || (pos == GetCount()),
 131                  _T("In a sorted choice data could only be appended"));
 132
 133     const int count = items.GetCount();
 134
 135     int n = wxNOT_FOUND;
 136
 137     for ( int i = 0; i < count; ++i )
 138     {
 139         n = pos + i;
 140         // If sorted, use this wxSortedArrayStrings to determine
 141         // the right insertion point
 142         if(m_strings)
 143             n = m_strings->Add(items[i]);
 144
 145         GTKInsertComboBoxTextItem( n, items[i] );
 146
 147         m_clientData.Insert( NULL, n );
 148         AssignNewItemClientData(n, clientData, i, type);
 149     }
 150
 151     InvalidateBestSize();
 152
 153     return n;
 154 }
 155
 156 void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
 157 {
 158     m_clientData[n] = clientData;
 159 }
 160
 161 void* wxChoice::DoGetItemClientData(unsigned int n) const
 162 {
 163     return m_clientData[n];
 164 }
 165
 166 void wxChoice::DoClear()
 167 {
 168     wxCHECK_RET( m_widget != NULL, wxT("invalid control") );
 169
 170     DisableEvents();
 171
 172     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 173     GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 174     gtk_list_store_clear(GTK_LIST_STORE(model));
 175
 176     m_clientData.Clear();
 177
 178     if (m_strings)
 179         m_strings->Clear();
 180
 181     EnableEvents();
 182
 183     InvalidateBestSize();
 184 }
 185
 186 void wxChoice::DoDeleteOneItem(unsigned int n)
 187 {
 188     wxCHECK_RET( m_widget != NULL, wxT("invalid control") );
 189     wxCHECK_RET( IsValid(n), _T("invalid index in wxChoice::Delete") );
 190
 191     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 192     GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 193     GtkListStore* store = GTK_LIST_STORE(model);
 194     GtkTreeIter iter;
 195     gtk_tree_model_iter_nth_child( model, &iter,
 196                                    NULL, (gint) n );
 197     gtk_list_store_remove( store, &iter );
 198
 199     m_clientData.RemoveAt( n );
 200     if ( m_strings )
 201         m_strings->RemoveAt( n );
 202
 203     InvalidateBestSize();
 204 }
 205
 206 int wxChoice::FindString( const wxString &item, bool bCase ) const
 207 {
 208     wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid control") );
 209
 210     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 211     GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 212     GtkTreeIter iter;
 213     gtk_tree_model_get_iter_first( model, &iter );
 214     if (!gtk_list_store_iter_is_valid(GTK_LIST_STORE(model), &iter ))
 215         return -1;
 216     int count = 0;
 217     do
 218     {
 219         GValue value = { 0, };
 220         gtk_tree_model_get_value( model, &iter, m_stringCellIndex, &value );
 221         wxString str = wxGTK_CONV_BACK( g_value_get_string( &value ) );
 222         g_value_unset( &value );
 223
 224         if (item.IsSameAs( str, bCase ) )
 225             return count;
 226
 227         count++;
 228     }
 229     while ( gtk_tree_model_iter_next(model, &iter) );
 230
 231     return wxNOT_FOUND;
 232 }
 233
 234 int wxChoice::GetSelection() const
 235 {
 236     return gtk_combo_box_get_active( GTK_COMBO_BOX( m_widget ) );
 237 }
 238
 239 void wxChoice::SetString(unsigned int n, const wxString &text)
 240 {
 241     wxCHECK_RET( m_widget != NULL, wxT("invalid control") );
 242
 243     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 244     wxCHECK_RET( IsValid(n), wxT("invalid index") );
 245
 246     GtkTreeModel *model = gtk_combo_box_get_model( combobox );
 247     GtkTreeIter iter;
 248     if (gtk_tree_model_iter_nth_child (model, &iter, NULL, n))
 249     {
 250         GValue value = { 0, };
 251         g_value_init( &value, G_TYPE_STRING );
 252         g_value_set_string( &value, wxGTK_CONV( text ) );
 253         gtk_list_store_set_value( GTK_LIST_STORE(model), &iter, m_stringCellIndex, &value );
 254         g_value_unset( &value );
 255     }
 256
 257     InvalidateBestSize();
 258 }
 259
 260 wxString wxChoice::GetString(unsigned int n) const
 261 {
 262     wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid control") );
 263
 264     wxString str;
 265
 266     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 267     GtkTreeModel *model = gtk_combo_box_get_model( combobox );
 268     GtkTreeIter iter;
 269     if (gtk_tree_model_iter_nth_child (model, &iter, NULL, n))
 270     {
 271         GValue value = { 0, };
 272         gtk_tree_model_get_value( model, &iter, m_stringCellIndex, &value );
 273         wxString tmp = wxGTK_CONV_BACK( g_value_get_string( &value ) );
 274         g_value_unset( &value );
 275         return tmp;
 276     }
 277
 278     return str;
 279 }
 280
 281 unsigned int wxChoice::GetCount() const
 282 {
 283     wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid control") );
 284
 285     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 286     GtkTreeModel* model = gtk_combo_box_get_model( combobox );
 287     GtkTreeIter iter;
 288     gtk_tree_model_get_iter_first( model, &iter );
 289     if (!gtk_list_store_iter_is_valid(GTK_LIST_STORE(model), &iter ))
 290         return 0;
 291     unsigned int ret = 1;
 292     while (gtk_tree_model_iter_next( model, &iter ))
 293         ret++;
 294     return ret;
 295 }
 296
 297 void wxChoice::SetSelection( int n )
 298 {
 299     wxCHECK_RET( m_widget != NULL, wxT("invalid control") );
 300
 301     DisableEvents();
 302
 303     GtkComboBox* combobox = GTK_COMBO_BOX( m_widget );
 304     gtk_combo_box_set_active( combobox, n );
 305
 306     EnableEvents();
 307 }
 308
 309 void wxChoice::DisableEvents()
 310 {
 311     g_signal_handlers_block_by_func(m_widget,
 312                                 (gpointer) gtk_choice_changed_callback, this);
 313 }
 314
 315 void wxChoice::EnableEvents()
 316 {
 317     g_signal_handlers_unblock_by_func(m_widget,
 318                                 (gpointer) gtk_choice_changed_callback, this);
 319 }
 320
 321
 322 GdkWindow *wxChoice::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
 323 {
 324     return m_widget->window;
 325 }
 326
 327 // Notice that this method shouldn't be necessary, because GTK calculates
 328 // properly size of the combobox but for unknown reasons it doesn't work
 329 // correctly in wx without this.
 330 wxSize wxChoice::DoGetBestSize() const
 331 {
 332     // strangely, this returns a width of 188 pixels from GTK+ (?)
 333     wxSize ret( wxControl::DoGetBestSize() );
 334
 335     // we know better our horizontal extent: it depends on the longest string
 336     // in the combobox
 337     if ( m_widget )
 338     {
 339         ret.x = 60;  // start with something "sensible"
 340         int width;
 341         unsigned int count = GetCount();
 342         for ( unsigned int n = 0; n < count; n++ )
 343         {
 344             GetTextExtent(GetString(n), &width, NULL, NULL, NULL );
 345             if ( width + 40 > ret.x ) // 40 for drop down arrow and space around text
 346                 ret.x = width + 40;
 347         }
 348     }
 349
 350     // empty combobox should have some reasonable default size too
 351     if ((GetCount() == 0) && (ret.x < 80))
 352         ret.x = 80;
 353
 354     CacheBestSize(ret);
 355     return ret;
 356 }
 357
 358 // static
 359 wxVisualAttributes
 360 wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
 361 {
 362     return GetDefaultAttributesFromGTKWidget(gtk_combo_box_new);
 363 }
 364
 365
 366 #endif // wxUSE_CHOICE || wxUSE_COMBOBOX