/////////////////////////////////////////////////////////////////////////////
-// Name: choice.cpp
+// Name: src/gtk1/choice.cpp
// Purpose:
// Author: Robert Roebling
// Id: $Id$
// Copyright: (c) 1998 Robert Roebling
-// Licence: wxWindows licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
+#include "wx/wxprec.h"
-#ifdef __GNUG__
-#pragma implementation "choice.h"
-#endif
+#if wxUSE_CHOICE
#include "wx/choice.h"
-#include "gdk/gdk.h"
-#include "gtk/gtk.h"
+#ifndef WX_PRECOMP
+ #include "wx/arrstr.h"
+#endif
+
+#include "wx/gtk1/private.h"
+
+//-----------------------------------------------------------------------------
+// idle system
+//-----------------------------------------------------------------------------
+
+extern void wxapp_install_idle_handler();
+extern bool g_isIdle;
//-----------------------------------------------------------------------------
// data
// "activate"
//-----------------------------------------------------------------------------
+extern "C" {
static void gtk_choice_clicked_callback( GtkWidget *WXUNUSED(widget), wxChoice *choice )
{
- if (!choice->HasVMT()) return;
- if (g_blockEventsOnDrag) return;
-
- wxCommandEvent event(wxEVT_COMMAND_CHOICE_SELECTED, choice->GetId() );
- event.SetInt( choice->GetSelection() );
- wxString tmp( choice->GetStringSelection() );
- event.SetString( WXSTRINGCAST(tmp) );
- event.SetEventObject(choice);
- choice->GetEventHandler()->ProcessEvent(event);
+ if (g_isIdle)
+ wxapp_install_idle_handler();
+
+ if (!choice->m_hasVMT) return;
+
+ if (g_blockEventsOnDrag) return;
+
+ int selection = wxNOT_FOUND;
+
+ 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++;
+ }
+
+ 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->HandleWindowEvent(event);
+}
}
//-----------------------------------------------------------------------------
// wxChoice
//-----------------------------------------------------------------------------
-IMPLEMENT_DYNAMIC_CLASS(wxChoice,wxControl)
+IMPLEMENT_DYNAMIC_CLASS(wxChoice, wxControlWithItems)
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,
int n, const wxString choices[],
long style, const wxValidator& validator, const wxString &name )
{
- m_needParent = TRUE;
-
- PreCreation( parent, id, pos, size, style, name );
-
- SetValidator( validator );
+ 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();
-
- wxSize newSize = size;
- if (newSize.x == -1) newSize.x = 80;
- if (newSize.y == -1) newSize.y = 26;
- SetSize( newSize.x, newSize.y );
-
+
+ if ( style & wxCB_SORT )
+ {
+ // if our m_strings != NULL, Append() 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++)
+
+ for (unsigned int i = 0; i < (unsigned int)n; i++)
{
- m_clientDataList.Append( (wxObject*) NULL );
- m_clientObjectList.Append( (wxObject*) NULL );
-
- GtkWidget *item = gtk_menu_item_new_with_label( choices[i] );
- gtk_menu_append( GTK_MENU(menu), item );
-
- gtk_widget_realize( item );
- gtk_widget_realize( GTK_BIN(item)->child );
-
- gtk_widget_show( item );
-
- gtk_signal_connect( GTK_OBJECT( item ), "activate",
- GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
+ GtkAddHelper(menu, i, choices[i]);
}
+
gtk_option_menu_set_menu( GTK_OPTION_MENU(m_widget), menu );
-
- m_parent->AddChild( this );
-
- (m_parent->m_insertCallback)( m_parent, this );
-
- PostCreation();
-
- SetBackgroundColour( parent->GetBackgroundColour() );
- SetForegroundColour( parent->GetForegroundColour() );
- SetFont( parent->GetFont() );
-
- Show( TRUE );
-
- return TRUE;
+
+ m_parent->DoAddChild( this );
+
+ PostCreation(size);
+ SetInitialSize(size); // need this too because this is a wxControlWithItems
+
+ return true;
}
-
+
wxChoice::~wxChoice()
{
Clear();
+
+ delete m_strings;
}
-void wxChoice::AppendCommon( const wxString &item )
+int wxChoice::DoInsertItems(const wxArrayStringsAdapter & items,
+ unsigned int pos,
+ void **clientData, wxClientDataType type)
{
- wxCHECK_RET( m_widget != NULL, "invalid choice" );
-
+ wxCHECK_MSG( m_widget != NULL, -1, wxT("invalid choice control") );
+
+ const unsigned int count = items.GetCount();
+
GtkWidget *menu = gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) );
- GtkWidget *menu_item = gtk_menu_item_new_with_label( item );
-
- gtk_menu_append( GTK_MENU(menu), menu_item );
-
- gtk_widget_realize( menu_item );
- gtk_widget_realize( GTK_BIN(menu_item)->child );
-
- if (m_widgetStyle) ApplyWidgetStyle();
-
- gtk_signal_connect( GTK_OBJECT( menu_item ), "activate",
- GTK_SIGNAL_FUNC(gtk_choice_clicked_callback), (gpointer*)this );
-
- gtk_widget_show( menu_item );
-}
-void wxChoice::Append( const wxString &item )
-{
- m_clientDataList.Append( (wxObject*) NULL );
- m_clientObjectList.Append( (wxObject*) NULL );
-
- AppendCommon( item );
-}
+ for ( unsigned int i = 0; i < count; ++i, ++pos )
+ {
+ int n = GtkAddHelper(menu, pos, items[i]);
+ if ( n == wxNOT_FOUND )
+ return n;
-void wxChoice::Append( const wxString &item, void *clientData )
-{
- m_clientDataList.Append( (wxObject*) clientData );
- m_clientObjectList.Append( (wxObject*) NULL );
-
- AppendCommon( item );
-}
+ AssignNewItemClientData(n, clientData, i, type);
+ }
-void wxChoice::Append( const wxString &item, wxClientData *clientData )
-{
- m_clientObjectList.Append( (wxObject*) clientData );
- m_clientDataList.Append( (wxObject*) NULL );
-
- AppendCommon( item );
-}
+ // if the item to insert is at or before the selection, and the selection is valid
+ if (((int)pos <= m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
+ {
+ // move the selection forward
+ m_selection_hack += count;
+ }
-void wxChoice::SetClientData( int n, void* clientData )
-{
- wxCHECK_RET( m_widget != NULL, "invalid combobox" );
-
- wxNode *node = m_clientDataList.Nth( n );
- if (!node) return;
-
- node->SetData( (wxObject*) clientData );
+ return pos - 1;
}
-void* wxChoice::GetClientData( int n )
+void wxChoice::DoSetItemClientData(unsigned int n, void* clientData)
{
- wxCHECK_MSG( m_widget != NULL, NULL, "invalid combobox" );
-
- wxNode *node = m_clientDataList.Nth( n );
- if (!node) return NULL;
-
- return node->Data();
-}
+ 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") );
-void wxChoice::SetClientObject( int n, wxClientData* clientData )
-{
- wxCHECK_RET( m_widget != NULL, "invalid combobox" );
-
- wxNode *node = m_clientObjectList.Nth( n );
- if (!node) return;
-
- wxClientData *cd = (wxClientData*) node->Data();
- if (cd) delete cd;
-
node->SetData( (wxObject*) clientData );
}
-wxClientData* wxChoice::GetClientObject( int n )
+void* wxChoice::DoGetItemClientData(unsigned int n) const
{
- wxCHECK_MSG( m_widget != NULL, (wxClientData*) NULL, "invalid combobox" );
-
- wxNode *node = m_clientObjectList.Nth( n );
- if (!node) return (wxClientData*) NULL;
-
- return (wxClientData*) node->Data();
+ 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::Clear()
+
+void wxChoice::DoClear()
{
- wxCHECK_RET( m_widget != NULL, "invalid choice" );
+ 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 );
-
- 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();
+
+ m_clientList.Clear();
+
+ if ( m_strings )
+ m_strings->Clear();
+
+ // begin with no selection
+ m_selection_hack = wxNOT_FOUND;
}
-void wxChoice::Delete( int WXUNUSED(n) )
+void wxChoice::DoDeleteOneItem(unsigned int n)
{
- wxFAIL_MSG( "wxChoice:Delete not implemented" );
+ wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
+
+ wxCHECK_RET( IsValid(n), _T("invalid index in wxChoice::Delete") );
+
+ // if the item to delete is before the selection, and the selection is valid
+ if (((int)n < m_selection_hack) && (m_selection_hack != wxNOT_FOUND))
+ {
+ // move the selection back one
+ m_selection_hack--;
+ }
+ else if ((int)n == m_selection_hack)
+ {
+ // invalidate the selection
+ m_selection_hack = wxNOT_FOUND;
+ }
+
+ // 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
+ const unsigned int count = GetCount();
+
+ wxList::compatibility_iterator node = m_clientList.GetFirst();
+
+ wxArrayString items;
+ wxArrayPtrVoid itemsData;
+ items.Alloc(count);
+ for ( unsigned i = 0; i < count; i++, node = node->GetNext() )
+ {
+ if ( i != n )
+ {
+ items.Add(GetString(i));
+ itemsData.Add(node->GetData());
+ }
+ }
+
+ wxChoice::DoClear();
+
+ void ** const data = &itemsData[0];
+ if ( HasClientObjectData() )
+ Append(items, wx_reinterpret_cast(wxClientData **, data));
+ else
+ Append(items, data);
}
-int wxChoice::FindString( const wxString &string ) const
+int wxChoice::FindString( const wxString &string, bool bCase ) const
{
- wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
+ wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, 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;
{
GtkBin *bin = GTK_BIN( child->data );
GtkLabel *label = (GtkLabel *) NULL;
- if (bin->child) label = GTK_LABEL(bin->child);
- if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-
- wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
-
- if (string == label->label) return count;
- child = child->next;
- count++;
+ 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") );
+
+ wxString tmp( label->label );
+
+ if (string.IsSameAs( tmp, bCase ))
+ return count;
+
+ child = child->next;
+ count++;
}
-
- wxFAIL_MSG( "wxChoice: string not found" );
-
- return -1;
+
+ return wxNOT_FOUND;
}
-int wxChoice::GetColumns() const
+int wxChoice::GetSelection() const
{
- return 1;
+ wxCHECK_MSG( m_widget != NULL, wxNOT_FOUND, wxT("invalid choice") );
+
+ return m_selection_hack;
+
}
-int wxChoice::GetSelection()
+void wxChoice::SetString(unsigned int n, const wxString& str )
{
- wxCHECK_MSG( m_widget != NULL, -1, "invalid choice" );
+ 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;
+ unsigned int count = 0;
GList *child = menu_shell->children;
while (child)
{
GtkBin *bin = GTK_BIN( child->data );
- if (!bin->child) return count;
+ 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++;
}
-
- wxFAIL_MSG( "wxChoice: no selection" );
-
- return -1;
}
-wxString wxChoice::GetString( int n ) const
+wxString wxChoice::GetString(unsigned int n) const
{
- wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
+ wxCHECK_MSG( m_widget != NULL, wxEmptyString, wxT("invalid choice") );
GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
- int count = 0;
+ unsigned int count = 0;
GList *child = menu_shell->children;
while (child)
{
if (count == n)
{
GtkLabel *label = (GtkLabel *) NULL;
- if (bin->child) label = GTK_LABEL(bin->child);
- if (!label) label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-
- wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
-
- return label->label;
+ 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") );
+
+ return wxString( label->label );
}
child = child->next;
count++;
}
-
- wxFAIL_MSG( "wxChoice: string not found" );
-
- return "";
-}
-wxString wxChoice::GetStringSelection() const
-{
- wxCHECK_MSG( m_widget != NULL, "", "invalid choice" );
+ wxFAIL_MSG( wxT("wxChoice: invalid index in GetString()") );
- GtkLabel *label = GTK_LABEL( GTK_BUTTON(m_widget)->child );
-
- wxASSERT_MSG( label != NULL , "wxChoice: invalid label" );
-
- return label->label;
+ return wxEmptyString;
}
-int wxChoice::Number() const
+unsigned int wxChoice::GetCount() const
{
- wxCHECK_MSG( m_widget != NULL, 0, "invalid choice" );
+ 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;
+ unsigned int count = 0;
GList *child = menu_shell->children;
while (child)
{
return count;
}
-void wxChoice::SetColumns( int WXUNUSED(n) )
-{
-}
-
void wxChoice::SetSelection( int n )
{
- wxCHECK_RET( m_widget != NULL, "invalid choice" );
+ wxCHECK_RET( m_widget != NULL, wxT("invalid choice") );
int tmp = n;
gtk_option_menu_set_history( GTK_OPTION_MENU(m_widget), (gint)tmp );
-
- gtk_choice_clicked_callback( (GtkWidget *) NULL, this );
-}
-void wxChoice::SetStringSelection( const wxString &string )
-{
- wxCHECK_RET( m_widget != NULL, "invalid choice" );
-
- int n = FindString( string );
- if (n != -1) SetSelection( n );
+ // set the local selection variable manually
+ if (IsValid((unsigned int)n))
+ {
+ // 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::ApplyWidgetStyle()
+void wxChoice::DoApplyWidgetStyle(GtkRcStyle *style)
{
- SetWidgetStyle();
-
GtkMenuShell *menu_shell = GTK_MENU_SHELL( gtk_option_menu_get_menu( GTK_OPTION_MENU(m_widget) ) );
-
- gtk_widget_set_style( m_widget, m_widgetStyle );
- gtk_widget_set_style( GTK_WIDGET( menu_shell ), m_widgetStyle );
-
+
+ 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_set_style( GTK_WIDGET( child->data ), m_widgetStyle );
-
+ 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 = GTK_BUTTON(m_widget)->child;
-
- gtk_widget_set_style( label, m_widgetStyle );
-
+ 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, unsigned int pos, const wxString& item)
+{
+ wxCHECK_MSG(pos<=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 == 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;
+ unsigned int count = GetCount();
+ for ( unsigned int 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 )
+{
+ return (window == m_widget->window);
+}
+
+// static
+wxVisualAttributes
+wxChoice::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))
+{
+ return GetDefaultAttributesFromGTKWidget(gtk_option_menu_new);
+}
+
+
+#endif // wxUSE_CHOICE
projects / wxWidgets.git / blobdiff