X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/c801d85f158c4cba50b588807daabdcbd0ed3853..b9efe021b554fa3967d1442cf758435c5cd5ae8f:/src/gtk1/choice.cpp

diff --git a/src/gtk1/choice.cpp b/src/gtk1/choice.cpp
index a7c5ff028b..7b8633ef1b 100644
--- a/src/gtk1/choice.cpp
+++ b/src/gtk1/choice.cpp
@@ -2,197 +2,645 @@
 // Name:        choice.cpp
 // Purpose:
 // Author:      Robert Roebling
-// Created:     01/02/97
-// Id:
-// Copyright:   (c) 1998 Robert Roebling, Julian Smart and Markus Holzem
-// Licence:   	wxWindows licence
+// Id:          $Id$
+// Copyright:   (c) 1998 Robert Roebling
+// Licence:     wxWindows licence
 /////////////////////////////////////////////////////////////////////////////
 
 
-#ifdef __GNUG__
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma implementation "choice.h"
 #endif
 
+#include "wx/defs.h"
+
+#if wxUSE_CHOICE
+
 #include "wx/choice.h"
+#include "wx/arrstr.h"
+
+#include "wx/gtk/private.h"
 
 //-----------------------------------------------------------------------------
-// wxChoice
+// idle system
+//-----------------------------------------------------------------------------
+
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
+
+//-----------------------------------------------------------------------------
+// data
+//-----------------------------------------------------------------------------
+
+extern bool   g_blockEventsOnDrag;
+
+//-----------------------------------------------------------------------------
+// "activate"
 //-----------------------------------------------------------------------------
 
-void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), gpointer data )
+extern "C" {
+static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
 {
-  wxChoice *choice = (wxChoice*)data;
-  wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId());
-  event.SetInt( choice->GetSelection() );
-  wxString tmp( choice->GetStringSelection() );
-  event.SetString( WXSTRINGCAST(tmp) );
-  event.SetEventObject(choice);
-  choice->ProcessEvent(event);
-};
+    if (g_isIdle)
+      wxapp_install_idle_handler();
+
+    if (!choice->m_hasVMT) return;
+
+    if (g_blockEventsOnDrag) return;
+
+    int selection = wxNOT_FOUND;
+
+#ifdef __WXGTK20__
+    selection = gtk_option_menu_get_history( GTK_OPTION_MENU(choice->GetHandle()) );
+#else
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(choice->GetHandle()) ) );
+    int count = 0;
+
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        GtkBin *bin = GTK_BIN( child->data );
+        if (!bin->child)
+        {
+            selection = count;
+            break;
+        }
+        child = child->next;
+        count++;
+    }
+#endif
+    choice->m_selection_hack = selection;
+
+    wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
+    int n = choice->GetSelection();
+
+    event.SetInt( n );
+    event.SetString( choice->GetStringSelection() );
+    event.SetEventObject(choice);
+
+    if ( choice->HasClientObjectData() )
+        event.SetClientObject( choice->GetClientObject(n) );
+    else if ( choice->HasClientUntypedData() )
+        event.SetClientData( choice->GetClientData(n) );
+
+    choice->GetEventHandler()->ProcessEvent(event);
+}
+}
 
+//-----------------------------------------------------------------------------
+// wxChoice
 //-----------------------------------------------------------------------------
 
-IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxWindow)
-
-wxChoice::wxChoice(void)
-{
-};
-
-wxChoice::wxChoice( wxWindow *parent, const wxWindowID id,
-      const wxPoint &pos, const wxSize &size, 
-      const int n, const wxString choices[],
-      const long style, const wxString &name )
-{
-  Create( parent, id, pos, size, n, choices, style, name );
-};
-
-bool wxChoice::Create( wxWindow *parent, const wxWindowID id,
-      const wxPoint &pos, const wxSize &size, 
-      const int n, const wxString choices[],
-      const long style, const wxString &name )
-{
-  m_needParent = TRUE;
-  
-  PreCreation( parent, id, pos, size, style, name );
-  
-  m_widget = gtk_option_menu_new();
-  
-  wxSize newSize = size;
-  if (newSize.x == -1) newSize.x = 80;
-  if (newSize.y == -1) newSize.y = 26;
-  SetSize( newSize.x, newSize.y );
-  
-  GtkWidget *menu;
-  menu = gtk_menu_new();
-  
-  for (int i = 0; i < n; i++)
-  {
-    GtkWidget *item;
-    item = gtk_menu_item_new_with_label( choices[i] );
-    gtk_signal_connect( GTK_OBJECT( item ), "activate", 
-      GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
-    gtk_menu_append( GTK_MENU(menu), item );
-    gtk_widget_show( item );
-  };
-  gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
-  
-  PostCreation();
-  
-  Show( TRUE );
-    
-  return TRUE;
-};
-      
-void wxChoice::Append( const wxString &item )
-{
-  GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
-  GtkWidget *menu_item;
-  menu_item = gtk_menu_item_new_with_label( item );
-  gtk_signal_connect( GTK_OBJECT( menu_item ), "activate", 
-    GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
-  gtk_menu_append( GTK_MENU(menu), menu_item );
-  gtk_widget_show( menu_item );
-};
- 
-void wxChoice::Clear(void)
-{
-  gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
-  GtkWidget *menu = gtk_menu_new();
-  gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
-};
+IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
+
+wxChoice::wxChoice()
+{
+    m_strings = (wxSortedArrayString *)NULL;
+}
+
+bool wxChoice::Create( wxWindow *parent, wxWindowID id,
+                       const wxPoint &pos, const wxSize &size,
+                       const wxArrayString& choices,
+                       long style, const wxValidator& validator,
+                       const wxString &name )
+{
+    wxCArrayString chs(choices);
+
+    return Create( parent, id, pos, size, chs.GetCount(), chs.GetStrings(),
+                   style, validator, name );
+}
+
+bool wxChoice::Create( wxWindow *parent, wxWindowID id,
+                       const wxPoint &pos, const wxSize &size,
+                       int n, const wxString choices[],
+                       long style, const wxValidator& validator, const wxString &name )
+{
+    m_needParent = TRUE;
+#if (GTK_MINOR_VERSION > 0)
+    m_acceptsFocus = TRUE;
+#endif
+
+    if (!PreCreation( parent, pos, size ) ||
+        !CreateBase( parent, id, pos, size, style, validator, name ))
+    {
+        wxFAIL_MSG( wxT("wxChoice creation failed") );
+        return FALSE;
+    }
+
+    m_widget = gtk_option_menu_new();
+
+    if ( style & wxCB_SORT )
+    {
+        // if our m_strings != NULL, DoAppend() will check for it and insert
+        // items in the correct order
+        m_strings = new wxSortedArrayString;
+    }
+
+    // begin with no selection
+    m_selection_hack = wxNOT_FOUND;
+
+    GtkWidget *menu = gtk_menu_new();
+
+    for (int i = 0; i < n; i++)
+    {
+        GtkAddHelper(menu, i, choices[i]);
+    }
+
+    gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
+
+    m_parent->DoAddChild( this );
+
+    PostCreation(size);
+    SetBestSize(size); // need this too because this is a wxControlWithItems
+
+    return TRUE;
+}
+
+wxChoice::~wxChoice()
+{
+    Clear();
+
+    delete m_strings;
+}
+
+int wxChoice::DoAppend( const wxString &item )
+{
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
+
+    GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
+
+    return GtkAddHelper(menu, GetCount(), item);
+}
+
+int wxChoice::DoInsert( const wxString &item, int pos )
+{
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
+    wxCHECK_MSG( (pos>=0) && (pos<=GetCount()), -1, wxT("invalid index"));
+
+    if (pos == GetCount())
+        return DoAppend(item);
+
+    GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
+
+    // if the item to insert is at or before the selection, and the selection is valid
+    if ((pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
+    {
+        // move the selection forward one
+        m_selection_hack++;
+    }
+
+    return GtkAddHelper(menu, pos, item);
+}
+
+void wxChoice::DoSetItemClientData( int n, void* clientData )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
+
+    wxList::compatibility_iterator node = m_clientList.Item( n );
+    wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientData") );
+
+    node->SetData( (wxObject*) clientData );
+}
+
+void* wxChoice::DoGetItemClientData( int n ) const
+{
+    wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid choice control") );
+
+    wxList::compatibility_iterator node = m_clientList.Item( n );
+    wxCHECK_MSG( node, NULL, wxT("invalid index in wxChoice::DoGetItemClientData") );
+
+    return node->GetData();
+}
+
+void wxChoice::DoSetItemClientObject( int n, wxClientData* clientData )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice control") );
+
+    wxList::compatibility_iterator node = m_clientList.Item( n );
+    wxCHECK_RET( node, wxT("invalid index in wxChoice::DoSetItemClientObject") );
+
+    // wxItemContainer already deletes data for us
+
+    node->SetData( (wxObject*) clientData );
+}
+
+wxClientData* wxChoice::DoGetItemClientObject( int n ) const
+{
+    wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, wxT("invalid choice control") );
+
+    wxList::compatibility_iterator node = m_clientList.Item( n );
+    wxCHECK_MSG( node, (wxClientData *)NULL,
+                 wxT("invalid index in wxChoice::DoGetItemClientObject") );
+
+    return (wxClientData*) node->GetData();
+}
+
+void wxChoice::Clear()
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
+
+    gtk_option_menu_remove_menu( GTK_OPTION_MENU(m_widget) );
+    GtkWidget *menu = gtk_menu_new();
+    gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
+
+    if ( HasClientObjectData() )
+    {
+        // destroy the data (due to Robert's idea of using wxList<wxObject>
+        // and not wxList<wxClientData> we can't just say
+        // m_clientList.DeleteContents(TRUE) - this would crash!
+        wxList::compatibility_iterator node = m_clientList.GetFirst();
+        while ( node )
+        {
+            delete (wxClientData *)node->GetData();
+            node = node->GetNext();
+        }
+    }
+    m_clientList.Clear();
+
+    if ( m_strings )
+        m_strings->Clear();
+
+    // begin with no selection
+    m_selection_hack = wxNOT_FOUND;
+}
+
+void wxChoice::Delete( int n )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
+
+    // VZ: apparently GTK+ doesn't have a built-in function to do it (not even
+    //     in 2.0), hence this dumb implementation -- still better than nothing
+    int i,
+        count = GetCount();
+
+    wxCHECK_RET( n >= 0 && n < count, _T("invalid index in wxChoice::Delete") );
+
+    // if the item to delete is before the selection, and the selection is valid
+    if ((n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
+    {
+        // move the selection back one
+        m_selection_hack--;
+    }
+    else if (n == m_selection_hack)
+    {
+        // invalidate the selection
+        m_selection_hack = wxNOT_FOUND;
+    }
+
+    const bool hasClientData = m_clientDataItemsType != wxClientData_None;
+    const bool hasObjectData = m_clientDataItemsType == wxClientData_Object;
+
+    wxList::compatibility_iterator node = m_clientList.GetFirst();
+
+    wxArrayString items;
+    wxArrayPtrVoid itemsData;
+    items.Alloc(count);
+    for ( i = 0; i < count; i++ )
+    {
+        if ( i != n )
+        {
+            items.Add(GetString(i));
+            if ( hasClientData )
+            {
+                // also save the client data
+                itemsData.Add(node->GetData());
+            }
+        }
+        else // need to delete the client object too
+        {
+            if ( hasObjectData )
+            {
+                delete (wxClientData *)node->GetData();
+            }
+        }
+
+        if ( hasClientData )
+        {
+            node = node->GetNext();
+        }
+    }
+
+    if ( hasObjectData )
+    {
+        // prevent Clear() from destroying all client data
+        m_clientDataItemsType = wxClientData_None;
+    }
+
+    Clear();
+
+    for ( i = 0; i < count - 1; i++ )
+    {
+        Append(items[i]);
+
+        if ( hasObjectData )
+            SetClientObject(i, (wxClientData *)itemsData[i]);
+        else if ( hasClientData )
+            SetClientData(i, itemsData[i]);
+    }
+}
 
 int wxChoice::FindString( const wxString &string ) const
 {
-  // If you read this code once and you think you undestand
-  // it, then you are very wrong. RR
-  
-  GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
-  int count = 0;
-  GList *child = menu_shell->children;
-  while (child)
-  {
-    GtkBin *bin = GTK_BIN( child->data );
-    GtkLabel *label = GTK_LABEL(bin->child);
-    if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-    if (string == label->label) return count;
-    child = child->next;
-    count++;
-  };
-  return -1;
-};
-
-int wxChoice::GetColumns(void) const
-{
-  return 1;
-};
-
-int wxChoice::GetSelection(void)
-{
-  GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
-  int count = 0;
-  GList *child = menu_shell->children;
-  while (child)
-  {
-    GtkBin *bin = GTK_BIN( child->data );
-    if (!bin->child) return count;
-    child = child->next;
-    count++;
-  };
-  return -1;
-};
-
-wxString wxChoice::GetString( const int n ) const
-{
-  GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
-  int count = 0;
-  GList *child = menu_shell->children;
-  while (child)
-  {
-    GtkBin *bin = GTK_BIN( child->data );
-    if (count == n)
-    {
-      GtkLabel *label = GTK_LABEL(bin->child);
-      if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-      return label->label;
-    };
-    child = child->next;
-    count++;
-  };
-  return "";
-};
-
-wxString wxChoice::GetStringSelection(void) const
-{
-  GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-  return label->label;
-};
-
-int wxChoice::Number(void) const
-{
-  GtkMenu *menu = GTK_MENU( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
-  int count = 0;
-  GList *child = menu->children;
-  while (child)
-  {
-    count++;
-    child = child->next;
-  };
-  return count;
-};
-
-void wxChoice::SetColumns( const int WXUNUSED(n) )
-{
-};
-
-void wxChoice::SetSelection( const int n )
-{
-  int tmp = n;
-  gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
-};
-
-void wxChoice::SetStringSelection( const wxString &string )
-{
-  int n = FindString( string );
-  if (n != -1) SetSelection( n );
-};
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
+
+    // If you read this code once and you think you understand
+    // it, then you are very wrong. Robert Roebling.
+
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
+    int count = 0;
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        GtkBin *bin = GTK_BIN( child->data );
+        GtkLabel *label = (GtkLabel *) NULL;
+        if (bin->child)
+            label = GTK_LABEL(bin->child);
+        if (!label)
+            label = GTK_LABEL( BUTTON_CHILD(m_widget) );
+
+        wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
+
+#ifdef __WXGTK20__
+         wxString tmp( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
+#else
+         wxString tmp( label->label );
+#endif
+        if (string == tmp)
+            return count;
+
+        child = child->next;
+        count++;
+    }
+
+    return -1;
+}
+
+int wxChoice::GetSelection() const
+{
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice") );
+
+    return m_selection_hack;
+
+}
+
+void wxChoice::SetString( int n, const wxString& str )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
+
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
+    int count = 0;
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        GtkBin *bin = GTK_BIN( child->data );
+        if (count == n)
+        {
+            GtkLabel *label = (GtkLabel *) NULL;
+            if (bin->child)
+                label = GTK_LABEL(bin->child);
+            if (!label)
+                label = GTK_LABEL( BUTTON_CHILD(m_widget) );
+
+            wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
+
+            gtk_label_set_text( label, wxGTK_CONV( str ) ); 
+            
+            return;
+        }
+        child = child->next;
+        count++;
+    }
+}
+
+wxString wxChoice::GetString( int n ) const
+{
+    wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid choice") );
+
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
+    int count = 0;
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        GtkBin *bin = GTK_BIN( child->data );
+        if (count == n)
+        {
+            GtkLabel *label = (GtkLabel *) NULL;
+            if (bin->child)
+                label = GTK_LABEL(bin->child);
+            if (!label)
+                label = GTK_LABEL( BUTTON_CHILD(m_widget) );
+
+            wxASSERT_MSG( label != NULL , wxT("wxChoice: invalid label") );
+
+#ifdef __WXGTK20__
+            return wxString( wxGTK_CONV_BACK( gtk_label_get_text( label) ) );
+#else
+            return wxString( label->label );
+#endif
+        }
+        child = child->next;
+        count++;
+    }
+
+    wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
+
+    return wxT("");
+}
+
+int wxChoice::GetCount() const
+{
+    wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid choice") );
+
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
+    int count = 0;
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        count++;
+        child = child->next;
+    }
+    return count;
+}
+
+void wxChoice::SetSelection( int n )
+{
+    wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
+
+    int tmp = n;
+    gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
+
+    // set the local selection variable manually
+    if ((n >= 0) && (n < GetCount()))
+    {
+        // a valid selection has been made
+        m_selection_hack = n;
+    }
+    else if ((n == wxNOT_FOUND) || (GetCount() == 0))
+    {
+        // invalidates the selection if there are no items
+        // or if it is specifically set to wxNOT_FOUND
+        m_selection_hack = wxNOT_FOUND;
+    }
+    else
+    {
+        // this selects the first item by default if the selection is out of bounds
+        m_selection_hack = 0;
+    }
+}
+
+void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style)
+{
+    GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
+
+    gtk_widget_modify_style( m_widget, style );
+    gtk_widget_modify_style( GTK_WIDGET( menu_shell ), style );
+
+    GList *child = menu_shell->children;
+    while (child)
+    {
+        gtk_widget_modify_style( GTK_WIDGET( child->data ), style );
+
+        GtkBin *bin = GTK_BIN( child->data );
+        GtkWidget *label = (GtkWidget *) NULL;
+        if (bin->child)
+            label = bin->child;
+        if (!label)
+            label = BUTTON_CHILD(m_widget);
+
+        gtk_widget_modify_style( label, style );
+
+        child = child->next;
+    }
+}
+
+int wxChoice::GtkAddHelper(GtkWidget *menu, int pos, const wxString& item)
+{
+    wxCHECK_MSG((pos>=0) && (pos<=(int)m_clientList.GetCount()), -1, wxT("invalid index"));
+
+    GtkWidget *menu_item = gtk_menu_item_new_with_label( wxGTK_CONV( item ) );
+
+    size_t index;
+    if ( m_strings )
+    {
+        // sorted control, need to insert at the correct index
+        index = m_strings->Add(item);
+
+        gtk_menu_insert( GTK_MENU(menu), menu_item, index );
+
+        if ( index )
+        {
+            m_clientList.Insert( m_clientList.Item(index - 1),
+                                 (wxObject*) NULL );
+        }
+        else
+        {
+            m_clientList.Insert( (wxObject*) NULL );
+        }
+    }
+    else
+    {
+        // don't call wxChoice::GetCount() from here because it doesn't work
+        // if we're called from ctor (and GtkMenuShell is still NULL)
+
+        // normal control, just append
+        if (pos == (int)m_clientList.GetCount())
+        {
+        gtk_menu_append( GTK_MENU(menu), menu_item );
+        m_clientList.Append( (wxObject*) NULL );
+        index = m_clientList.GetCount() - 1;
+        }
+        else
+        {
+            gtk_menu_insert( GTK_MENU(menu), menu_item, pos );
+            m_clientList.Insert( pos, (wxObject*) NULL );
+            index = pos;
+        }
+    }
+
+    if (GTK_WIDGET_REALIZED(m_widget))
+    {
+        gtk_widget_realize( menu_item );
+        gtk_widget_realize( GTK_BIN(menu_item)->child );
+
+        ApplyWidgetStyle();
+    }
+
+    // The best size of a wxChoice should probably
+    // be changed everytime the control has been
+    // changed, but at least after adding an item
+    // it has to change. Adapted from Matt Ownby.
+    InvalidateBestSize();
+    
+    gtk_signal_connect_after( GTK_OBJECT( menu_item ), "activate",
+      GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
+
+    gtk_widget_show( menu_item );
+
+    // return the index of the item in the control
+    return index;
+}
+
+wxSize wxChoice::DoGetBestSize() const
+{
+    wxSize ret( wxControl::DoGetBestSize() );
+
+    // we know better our horizontal extent: it depends on the longest string
+    // we have
+    ret.x = 0;
+    if ( m_widget )
+    {
+        int width;
+        size_t count = GetCount();
+        for ( size_t n = 0; n < count; n++ )
+        {
+            GetTextExtent( GetString(n), &width, NULL, NULL, NULL );
+            if ( width > ret.x )
+                ret.x = width;
+        }
+
+        // add extra for the choice "=" button
+
+        // VZ: I don't know how to get the right value, it seems to be in
+        //     GtkOptionMenuProps struct from gtkoptionmenu.c but we can't get
+        //     to it - maybe we can use gtk_option_menu_size_request() for this
+        //     somehow?
+        //
+        //     This default value works only for the default GTK+ theme (i.e.
+        //     no theme at all) (FIXME)
+        static const int widthChoiceIndicator = 35;
+        ret.x += widthChoiceIndicator;
+    }
+
+    // but not less than the minimal width
+    if ( ret.x < 80 )
+        ret.x = 80;
+
+    // If this request_size is called with no entries then
+    // the returned height is wrong. Give it a reasonable
+    // default value.
+    if (ret.y <= 18)
+        ret.y = 8 + GetCharHeight();
+
+    CacheBestSize(ret);
+    return ret;
+}
+
+bool wxChoice::IsOwnGtkWindow( GdkWindow *window )
+{
+#ifdef __WXGTK20__
+    return GTK_BUTTON(m_widget)->event_window;
+#else
+    return (window == m_widget->window);
+#endif
+}
+
+// static
+wxVisualAttributes
+wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+{
+    return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new);
+}
+
+
+#endif // wxUSE_CHOICE