70002771 Use control key to switch between multi and single selection

Summary

Use control key to switch between multi and single selection. When a command that wait for a user selection, like move copy etc. , we want to start a window selection only if the Control Key is pressed else assept only single entities under the left mouse down

Solution

Example code

VdDocument doc;//A predefine document

      doc.ActionStart += Doc_ActionStart;
      doc.ActionEnd += Doc_ActionEnd;

       bool isselecting = false;//it is true when a user selection is started
        private void Doc_ActionEnd(object sender, string actionName)
        {
            if (actionName == "CmdSelect") isselecting = false;
        }
        private void Doc_ActionStart(object sender, string actionName, ref bool cancel)
        {
            if (actionName == "CmdSelect") isselecting = true;
            if (!isselecting || actionName != "BaseAction_ActionGetRectFromPointSelectDCS") return;//ActionGetRectFromPointSelectDCS is started by default when no entity is found uder the mouse down and a window selection started
            //it is ActionGetRectFromPointSelectDCS inside CmdSelect
            BaseAction action = doc.ActiveLayOut.OverAllActiveAction;//get the active action object which is a type of ActionGetRectFromPointSelectDCS
            if (BaseAction.PressedKeyCode != Keys.Control) action.FinishAction(action);//if the Control key is not pressed then immediately finish the window select action 
        }

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