/** * Called by Slate to determine if this button is enabled * * @return True if the menu entry is enabled, false otherwise */ bool SToolBarButtonBlock::IsEnabled() const { TSharedPtr< const FUICommandList > ActionList = MultiBlock->GetActionList(); TSharedPtr< const FUICommandInfo > Action = MultiBlock->GetAction(); const FUIAction& DirectActions = MultiBlock->GetDirectActions(); bool bEnabled = true; if( ActionList.IsValid() && Action.IsValid() ) { bEnabled = ActionList->CanExecuteAction( Action.ToSharedRef() ); } else { // There is no action list or action associated with this block via a UI command. Execute any direct action we have bEnabled = DirectActions.CanExecute(); } return bEnabled; }