X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d345e841da6719c3de9de784220aafafb5eb1e93..2d4b5a5e99d62f6e6fd127f8afb4e551aa9aceac:/src/gtk/combobox.cpp?ds=sidebyside

diff --git a/src/gtk/combobox.cpp b/src/gtk/combobox.cpp
index 98b3ba7b82..3cd992283d 100644
--- a/src/gtk/combobox.cpp
+++ b/src/gtk/combobox.cpp
@@ -13,10 +13,21 @@
 
 #include "wx/combobox.h"
 
-#include <wx/intl.h>
+#if wxUSE_COMBOBOX
 
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#include "wx/settings.h"
+#include "wx/intl.h"
+
+#include "wx/textctrl.h"    // for wxEVT_COMMAND_TEXT_UPDATED
+
+#include "wx/gtk/private.h"
+
+//-----------------------------------------------------------------------------
+// idle system
+//-----------------------------------------------------------------------------
+
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
 
 //-----------------------------------------------------------------------------
 // data
@@ -31,11 +42,11 @@ extern bool   g_blockEventsOnDrag;
 static void
 gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 {
-    if (!combo->HasVMT())
-        return;
+    if (g_isIdle) wxapp_install_idle_handler();
 
-    if (g_blockEventsOnDrag)
-        return;
+    if (!combo->m_hasVMT) return;
+
+    if (g_blockEventsOnDrag) return;
 
     if (combo->m_alreadySent)
     {
@@ -45,10 +56,21 @@ gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 
     combo->m_alreadySent = TRUE;
 
+    int curSelection = combo->GetSelection();
+
+    if (combo->m_prevSelection != curSelection)
+    {
+        GtkWidget *list = GTK_COMBO(combo->m_widget)->list;
+        gtk_list_unselect_item( GTK_LIST(list), combo->m_prevSelection );
+    }
+
+    combo->m_prevSelection = curSelection;
+
     wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, combo->GetId() );
-    event.SetInt( combo->GetSelection() );
+    event.SetInt( curSelection );
     event.SetString( combo->GetStringSelection() );
     event.SetEventObject( combo );
+
     combo->GetEventHandler()->ProcessEvent( event );
 }
 
@@ -59,6 +81,10 @@ gtk_combo_clicked_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 static void
 gtk_text_changed_callback( GtkWidget *WXUNUSED(widget), wxComboBox *combo )
 {
+    if (g_isIdle) wxapp_install_idle_handler();
+
+    if (!combo->m_hasVMT) return;
+
     wxCommandEvent event( wxEVT_COMMAND_TEXT_UPDATED, combo->GetId() );
     event.SetString( combo->GetValue() );
     event.SetEventObject( combo );
@@ -85,46 +111,50 @@ bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
     m_alreadySent = FALSE;
     m_needParent = TRUE;
     m_acceptsFocus = TRUE;
+    m_prevSelection = 0;
 
-    PreCreation( parent, id, pos, size, style, name );
-
-    SetValidator( validator );
+    if (!PreCreation( parent, pos, size ) ||
+        !CreateBase( parent, id, pos, size, style, validator, name ))
+    {
+        wxFAIL_MSG( wxT("wxComboBox creation failed") );
+        return FALSE;
+    }
 
     m_widget = gtk_combo_new();
 
     // make it more useable
-    gtk_combo_set_use_arrows_always(GTK_COMBO(m_widget), TRUE);
+    gtk_combo_set_use_arrows_always( GTK_COMBO(m_widget), TRUE );
+    
+    // and case-sensitive
+    gtk_combo_set_case_sensitive( GTK_COMBO(m_widget), TRUE );
 
-    wxSize newSize = size;
-    if (newSize.x == -1)
-        newSize.x = 100;
-    if (newSize.y == -1)
-        newSize.y = 26;
-    SetSize( newSize.x, newSize.y );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
+    gtk_list_set_selection_mode( GTK_LIST(list), GTK_SELECTION_MULTIPLE );
+
     for (int i = 0; i < n; i++)
     {
-        GtkWidget *list_item = gtk_list_item_new_with_label( choices[i] );
+        /* don't send first event, which GTK sends aways when
+           inserting the first item */
+        m_alreadySent = TRUE;
+
+        GtkWidget *list_item = gtk_list_item_new_with_label( choices[i].mbc_str() );
 
         m_clientDataList.Append( (wxObject*)NULL );
         m_clientObjectList.Append( (wxObject*)NULL );
 
         gtk_container_add( GTK_CONTAINER(list), list_item );
 
-        gtk_widget_realize( list_item );
-        gtk_widget_realize( GTK_BIN(list_item)->child );
+        gtk_signal_connect( GTK_OBJECT(list_item), "select",
+           GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 
         gtk_widget_show( list_item );
-
-        gtk_signal_connect( GTK_OBJECT(list_item), "select",
-        GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
     }
 
-    m_parent->AddChild( this );
-
-    (m_parent->m_insertCallback)( m_parent, this );
+    m_parent->DoAddChild( this );
+    
+    m_focusWidget = GTK_COMBO(m_widget)->entry;
 
     PostCreation();
 
@@ -132,16 +162,31 @@ bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 
     if (!value.IsNull()) SetValue( value );
 
-    gtk_widget_realize( GTK_COMBO(m_widget)->list );
-    gtk_widget_realize( GTK_COMBO(m_widget)->entry );
-    gtk_widget_realize( GTK_COMBO(m_widget)->button );
+    if (style & wxCB_READONLY)
+        gtk_entry_set_editable( GTK_ENTRY( GTK_COMBO(m_widget)->entry ), FALSE );
 
     gtk_signal_connect( GTK_OBJECT(GTK_COMBO(m_widget)->entry), "changed",
       GTK_SIGNAL_FUNC(gtk_text_changed_callback), (gpointer)this);
 
-    SetBackgroundColour( parent->GetBackgroundColour() );
+    wxSize size_best( DoGetBestSize() );
+    wxSize new_size( size );
+    if (new_size.x == -1)
+        new_size.x = size_best.x;
+    if (new_size.y == -1)
+        new_size.y = size_best.y;
+    if (new_size.y > size_best.y)
+        new_size.y = size_best.y;
+    if ((new_size.x != size.x) || (new_size.y != size.y))
+    {
+        SetSize( new_size.x, new_size.y );
+        
+        // This is required for tool bar support
+        gtk_widget_set_usize( m_widget, new_size.x, new_size.y );
+    }
+
+
+    SetBackgroundColour( wxSystemSettings::GetColour( wxSYS_COLOUR_WINDOW ) );
     SetForegroundColour( parent->GetForegroundColour() );
-    SetFont( parent->GetFont() );
 
     Show( TRUE );
 
@@ -150,30 +195,38 @@ bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 
 wxComboBox::~wxComboBox()
 {
-    wxNode *node = m_clientDataList.First();
+    wxNode *node = m_clientObjectList.First();
     while (node)
     {
         wxClientData *cd = (wxClientData*)node->Data();
         if (cd) delete cd;
         node = node->Next();
     }
+    m_clientObjectList.Clear();
+
     m_clientDataList.Clear();
 }
 
 void wxComboBox::AppendCommon( const wxString &item )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
-    GtkWidget *list_item = gtk_list_item_new_with_label( item );
+    GtkWidget *list_item = gtk_list_item_new_with_label( item.mbc_str() );
+
+    gtk_container_add( GTK_CONTAINER(list), list_item );
 
     gtk_signal_connect( GTK_OBJECT(list_item), "select",
       GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
 
-    gtk_container_add( GTK_CONTAINER(list), list_item );
+    if (GTK_WIDGET_REALIZED(m_widget))
+    {
+        gtk_widget_realize( list_item );
+        gtk_widget_realize( GTK_BIN(list_item)->child );
 
-    if (m_widgetStyle) ApplyWidgetStyle();
+        if (m_widgetStyle) ApplyWidgetStyle();
+    }
 
     gtk_widget_show( list_item );
 }
@@ -204,7 +257,7 @@ void wxComboBox::Append( const wxString &item, wxClientData *clientData )
 
 void wxComboBox::SetClientData( int n, void* clientData )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     wxNode *node = m_clientDataList.Nth( n );
     if (!node) return;
@@ -214,7 +267,7 @@ void wxComboBox::SetClientData( int n, void* clientData )
 
 void* wxComboBox::GetClientData( int n )
 {
-    wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, NULL, wxT("invalid combobox") );
 
     wxNode *node = m_clientDataList.Nth( n );
     if (!node) return NULL;
@@ -224,7 +277,7 @@ void* wxComboBox::GetClientData( int n )
 
 void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     wxNode *node = m_clientObjectList.Nth( n );
     if (!node) return;
@@ -237,9 +290,9 @@ void wxComboBox::SetClientObject( int n, wxClientData* clientData )
 
 wxClientData* wxComboBox::GetClientObject( int n )
 {
-    wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, (wxClientData*)NULL, wxT("invalid combobox") );
 
-    wxNode *node = m_clientDataList.Nth( n );
+    wxNode *node = m_clientObjectList.Nth( n );
     if (!node) return (wxClientData*) NULL;
 
     return (wxClientData*) node->Data();
@@ -247,7 +300,7 @@ wxClientData* wxComboBox::GetClientObject( int n )
 
 void wxComboBox::Clear()
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
     gtk_list_clear_items( GTK_LIST(list), 0, Number() );
@@ -266,7 +319,7 @@ void wxComboBox::Clear()
 
 void wxComboBox::Delete( int n )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkList *listbox = GTK_LIST( GTK_COMBO(m_widget)->list );
 
@@ -274,7 +327,7 @@ void wxComboBox::Delete( int n )
 
     if (!child)
     {
-        wxFAIL_MSG("wrong index");
+        wxFAIL_MSG(wxT("wrong index"));
         return;
     }
 
@@ -299,7 +352,7 @@ void wxComboBox::Delete( int n )
 
 int wxComboBox::FindString( const wxString &item )
 {
-    wxCHECK_MSG( m_widget != NULL, -1, "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
@@ -309,7 +362,7 @@ int wxComboBox::FindString( const wxString &item )
     {
         GtkBin *bin = GTK_BIN( child->data );
         GtkLabel *label = GTK_LABEL( bin->child );
-        if (item == label->label)
+        if (item == wxString(label->label,*wxConvCurrent))
             return count;
         count++;
         child = child->next;
@@ -320,7 +373,7 @@ int wxComboBox::FindString( const wxString &item )
 
 int wxComboBox::GetSelection() const
 {
-    wxCHECK_MSG( m_widget != NULL, -1, "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
@@ -337,14 +390,12 @@ int wxComboBox::GetSelection() const
         }
     }
 
-    wxFAIL_MSG( "wxComboBox: no selection" );
-
     return -1;
 }
 
 wxString wxComboBox::GetString( int n ) const
 {
-    wxCHECK_MSG( m_widget != NULL, "", "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
@@ -354,11 +405,11 @@ wxString wxComboBox::GetString( int n ) const
     {
         GtkBin *bin = GTK_BIN( child->data );
         GtkLabel *label = GTK_LABEL( bin->child );
-        str = label->label;
+        str = wxString(label->label,*wxConvCurrent);
     }
     else
     {
-        wxFAIL_MSG( "wxComboBox: wrong index" );
+        wxFAIL_MSG( wxT("wxComboBox: wrong index") );
     }
 
     return str;
@@ -366,7 +417,7 @@ wxString wxComboBox::GetString( int n ) const
 
 wxString wxComboBox::GetStringSelection() const
 {
-    wxCHECK_MSG( m_widget != NULL, "", "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, wxT(""), wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
@@ -374,18 +425,18 @@ wxString wxComboBox::GetStringSelection() const
     if (selection)
     {
         GtkBin *bin = GTK_BIN( selection->data );
-        wxString tmp = GTK_LABEL( bin->child )->label;
+        wxString tmp = wxString(GTK_LABEL( bin->child )->label,*wxConvCurrent);
         return tmp;
     }
 
-    wxFAIL_MSG( "wxComboBox: no selection" );
+    wxFAIL_MSG( wxT("wxComboBox: no selection") );
 
-    return "";
+    return wxT("");
 }
 
 int wxComboBox::Number() const
 {
-    wxCHECK_MSG( m_widget != NULL, 0, "invalid combobox" );
+    wxCHECK_MSG( m_widget != NULL, 0, wxT("invalid combobox") );
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
 
@@ -397,15 +448,21 @@ int wxComboBox::Number() const
 
 void wxComboBox::SetSelection( int n )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
+
+    DisableEvents();
 
     GtkWidget *list = GTK_COMBO(m_widget)->list;
+    gtk_list_unselect_item( GTK_LIST(list), m_prevSelection );
     gtk_list_select_item( GTK_LIST(list), n );
+    m_prevSelection = n;
+
+    EnableEvents();
 }
 
 void wxComboBox::SetStringSelection( const wxString &string )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     int res = FindString( string );
     if (res == -1) return;
@@ -415,59 +472,47 @@ void wxComboBox::SetStringSelection( const wxString &string )
 wxString wxComboBox::GetValue() const
 {
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-    wxString tmp = gtk_entry_get_text( GTK_ENTRY(entry) );
+    wxString tmp = wxString(gtk_entry_get_text( GTK_ENTRY(entry) ),*wxConvCurrent);
     return tmp;
 }
 
 void wxComboBox::SetValue( const wxString& value )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-    wxString tmp = "";
+    wxString tmp = wxT("");
     if (!value.IsNull()) tmp = value;
-    gtk_entry_set_text( GTK_ENTRY(entry), tmp );
+    gtk_entry_set_text( GTK_ENTRY(entry), tmp.mbc_str() );
 }
 
 void wxComboBox::Copy()
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-#if (GTK_MINOR_VERSION > 0)
-    gtk_editable_copy_clipboard( GTK_EDITABLE(entry) );
-#else
-    gtk_editable_copy_clipboard( GTK_EDITABLE(entry), 0 );
-#endif
+    gtk_editable_copy_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 }
 
 void wxComboBox::Cut()
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-#if (GTK_MINOR_VERSION > 0)
-    gtk_editable_cut_clipboard( GTK_EDITABLE(entry) );
-#else
-    gtk_editable_cut_clipboard( GTK_EDITABLE(entry), 0 );
-#endif
+    gtk_editable_cut_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG );
 }
 
 void wxComboBox::Paste()
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-#if (GTK_MINOR_VERSION > 0)
-    gtk_editable_paste_clipboard( GTK_EDITABLE(entry) );
-#else
-    gtk_editable_paste_clipboard( GTK_EDITABLE(entry), 0 );
-#endif
+    gtk_editable_paste_clipboard( GTK_EDITABLE(entry) DUMMY_CLIPBOARD_ARG);
 }
 
 void wxComboBox::SetInsertionPoint( long pos )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
     gtk_entry_set_position( GTK_ENTRY(entry), (int)pos );
@@ -475,15 +520,14 @@ void wxComboBox::SetInsertionPoint( long pos )
 
 void wxComboBox::SetInsertionPointEnd()
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     SetInsertionPoint( -1 );
 }
 
 long wxComboBox::GetInsertionPoint() const
 {
-    GtkWidget *entry = GTK_COMBO(m_widget)->entry;
-    return (long) GTK_EDITABLE(entry)->current_pos;
+    return (long) GET_EDITABLE_POS( GTK_COMBO(m_widget)->entry );
 }
 
 long wxComboBox::GetLastPosition() const
@@ -495,18 +539,19 @@ long wxComboBox::GetLastPosition() const
 
 void wxComboBox::Replace( long from, long to, const wxString& value )
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
+    // FIXME: not quite sure how to do this method right in multibyte mode
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
     if (value.IsNull()) return;
     gint pos = (gint)to;
-    gtk_editable_insert_text( GTK_EDITABLE(entry), value, value.Length(), &pos );
+    gtk_editable_insert_text( GTK_EDITABLE(entry), value.mbc_str(), value.Length(), &pos );
 }
 
 void wxComboBox::Remove(long from, long to)
 {
-    wxCHECK_RET( m_widget != NULL, "invalid combobox" );
+    wxCHECK_RET( m_widget != NULL, wxT("invalid combobox") );
 
     GtkWidget *entry = GTK_COMBO(m_widget)->entry;
     gtk_editable_delete_text( GTK_EDITABLE(entry), (gint)from, (gint)to );
@@ -547,6 +592,7 @@ void wxComboBox::OnChar( wxKeyEvent &event )
             if ( FindString(value) == wxNOT_FOUND )
             {
                 Append(value);
+                SetStringSelection(value);
 
                 // and generate the selected event for it
                 wxCommandEvent event( wxEVT_COMMAND_COMBOBOX_SELECTED, GetId() );
@@ -555,29 +601,76 @@ void wxComboBox::OnChar( wxKeyEvent &event )
                 event.SetEventObject( this );
                 GetEventHandler()->ProcessEvent( event );
             }
-            //else: do nothing, this will open the listbox
+            else
+            {
+                // This will invoke the dialog default action, such
+                // as the clicking the default button.
+    
+                wxWindow *top_frame = m_parent;
+                while (top_frame->GetParent() && !(top_frame->IsTopLevel()))
+                top_frame = top_frame->GetParent();
+        
+                if (top_frame && GTK_IS_WINDOW(top_frame->m_widget))
+                {
+                    GtkWindow *window = GTK_WINDOW(top_frame->m_widget);
+
+                    if (window->default_widget)
+                    {
+                        gtk_widget_activate (window->default_widget);
+                        return;
+                    }
+                }
+            }
         }
     }
 
     event.Skip();
 }
 
+void wxComboBox::DisableEvents()
+{
+    GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
+    GList *child = list->children;
+    while (child)
+    {
+        gtk_signal_disconnect_by_func( GTK_OBJECT(child->data),
+          GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
+
+        child = child->next;
+    }
+}
+
+void wxComboBox::EnableEvents()
+{
+    GtkList *list = GTK_LIST( GTK_COMBO(m_widget)->list );
+    GList *child = list->children;
+    while (child)
+    {
+        gtk_signal_connect( GTK_OBJECT(child->data), "select",
+          GTK_SIGNAL_FUNC(gtk_combo_clicked_callback), (gpointer)this );
+
+        child = child->next;
+    }
+}
+
 void wxComboBox::OnSize( wxSizeEvent &event )
 {
-    wxControl::OnSize( event );
+    event.Skip();
 
+#if 0
     int w = 21;
     gtk_widget_set_usize( GTK_COMBO(m_widget)->entry, m_width-w-1, m_height );
 
     gtk_widget_set_uposition( GTK_COMBO(m_widget)->button, m_x+m_width-w, m_y );
     gtk_widget_set_usize( GTK_COMBO(m_widget)->button, w, m_height );
+#endif // 0
 }
 
 void wxComboBox::ApplyWidgetStyle()
 {
     SetWidgetStyle();
 
-    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
+//    gtk_widget_set_style( GTK_COMBO(m_widget)->button, m_widgetStyle );
     gtk_widget_set_style( GTK_COMBO(m_widget)->entry, m_widgetStyle );
     gtk_widget_set_style( GTK_COMBO(m_widget)->list, m_widgetStyle );
 
@@ -605,3 +698,31 @@ bool wxComboBox::IsOwnGtkWindow( GdkWindow *window )
              (window == GTK_COMBO(m_widget)->button->window ) );
 }
 
+wxSize wxComboBox::DoGetBestSize() const
+{
+    wxSize ret( wxControl::DoGetBestSize() );
+
+    // we know better our horizontal extent: it depends on the longest string
+    // in the combobox
+    ret.x = 0;
+    if ( m_widget )
+    {
+        GdkFont *font = m_font.GetInternalFont();
+
+        wxCoord width;
+        size_t count = Number();
+        for ( size_t n = 0; n < count; n++ )
+        {
+            width = (wxCoord)gdk_string_width(font, GetString(n).mbc_str());
+            if ( width > ret.x )
+                ret.x = width;
+        }
+    }
+
+    // empty combobox should have some reasonable default size too
+    if ( ret.x < 100 )
+        ret.x = 100;
+    return ret;
+}
+
+#endif