private static void CommandProperty_Changed(DependencyObject dependencyObject, DependencyPropertyChangedEventArgs e)
{
Control element = dependencyObject as Control;
if (element != null)
{
PreviewKeyDownBehavior behavior = GetOrCreateBehavior(element);
behavior.Command = e.NewValue as ICommand;
}
}
private static PreviewKeyDownBehavior GetOrCreateBehavior(Control element)
{
PreviewKeyDownBehavior behavior = element.GetValue(PreviewKeyDownBehaviorProperty) as PreviewKeyDownBehavior;
if (behavior == null)
{
behavior = new PreviewKeyDownBehavior(element);
element.SetValue(PreviewKeyDownBehaviorProperty, behavior);
}
return(behavior);
}
public static void SetPreviewKeyDownBehavior(DependencyObject obj,
PreviewKeyDownBehavior value)
{
obj.SetValue(PreviewKeyDownBehaviorProperty, value);
}