public override void Reset()
{
UndoService undoService = _designItem.Services.GetService <UndoService>();
if (undoService != null)
{
undoService.Execute(new PropertyChangeAction(this, null, false));
}
else
{
ResetInternal();
}
}
void Execute(ITransactionItem item)
{
UndoService undoService = context.Services.GetService <UndoService>();
if (undoService != null)
{
undoService.Execute(item);
}
else
{
item.Do();
}
}
public override void SetValue(object value)
{
XamlPropertyValue newValue;
if (value == null)
{
newValue = _property.ParentObject.OwnerDocument.CreateNullValue();
}
else
{
XamlComponentService componentService = _designItem.ComponentService;
XamlDesignItem designItem = value as XamlDesignItem;
if (designItem == null)
{
designItem = (XamlDesignItem)componentService.GetDesignItem(value);
}
if (designItem != null)
{
if (designItem.Parent != null)
{
throw new DesignerException("Cannot set value to design item that already has a parent");
}
newValue = designItem.XamlObject;
}
else
{
XamlPropertyValue val = _property.ParentObject.OwnerDocument.CreatePropertyValue(value, _property);
designItem = componentService.RegisterXamlComponentRecursive(val as XamlObject);
newValue = val;
}
}
UndoService undoService = _designItem.Services.GetService <UndoService>();
if (undoService != null)
{
undoService.Execute(new PropertyChangeAction(this, newValue, true));
}
else
{
SetValueInternal(newValue);
}
}