/// <summary>
/// Called when the behavior is being detached from its AssociatedObject, but before it has actually occurred.
/// </summary>
/// <remarks>
/// Override this to unhook functionality from the AssociatedObject.
/// </remarks>
protected override void OnDetaching()
{
base.OnDetaching();
var mappings = EventCommander.GetMappings(AssociatedObject);
if (mappings != null && _commandEvent != null)
{
mappings.Remove(_commandEvent);
}
}
/// <summary>
/// Hooks the event maps
/// </summary>
private void HookEvents()
{
var mappings = EventCommander.GetMappings(AssociatedObject);
if (mappings == null)
{
mappings = new CommandEventCollection();
EventCommander.SetMappings(AssociatedObject, mappings);
}
_commandEvent = new CommandEvent {
Command = this, CommandParameter = this.CommandParameter, Event = this.Event
};
mappings.Add(_commandEvent);
}