// 依存プロパティが変更されたときの処理
private static void OnMustToggleIsEnabledChanged(
DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
EventToCommand parent = obj as EventToCommand;
if (parent != null && e.NewValue != null)
{
if (parent.AssociatedObject == null)
{
return;
}
parent.EnableDisableElement();
}
}
private static void OnCommandChanged(
EventToCommand element,
DependencyPropertyChangedEventArgs e)
{
if (element == null)
{
return;
}
if (e.OldValue != null)
{
((ICommand)e.OldValue).CanExecuteChanged -= element.OnCommandCanExecuteChanged;
}
var command = (ICommand)e.NewValue;
if (command != null)
{
command.CanExecuteChanged += element.OnCommandCanExecuteChanged;
}
element.EnableDisableElement();
}