protected virtual void StatefulPerform(CommandKey key, object param)
{
CommandHandler handler;
if (!_handlers.TryGetValue(key, out handler))
{
return;
}
StatefulCommandHandler stateHandler = handler as StatefulCommandHandler;
if (stateHandler == null)
{
return;
}
stateHandler.Selected = !stateHandler.Selected;
if (stateHandler.Perform != null)
{
stateHandler.Perform(param);
}
Invalidate(key);
}
public virtual bool IsSelected(CommandKey key)
{
CommandHandler handler;
if (!_handlers.TryGetValue(key, out handler))
{
return(false);
}
StatefulCommandHandler stateHandler = handler as StatefulCommandHandler;
if (stateHandler != null)
{
return(stateHandler.Selected);
}
CommandGroup group;
if (!_toggleGroups.TryGetValue(handler.Group, out group))
{
return(false);
}
return(group.Selected == key);
}
public void RegisterToggle(CommandKey key, Func <object, bool> performCheck, Action <object> perform)
{
_handlers[key] = new StatefulCommandHandler()
{
CanPerform = performCheck ?? DefaultStatefulCheck,
Perform = perform,
};
}
