src/gtk/choice.cpp

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