/// <summary>
/// Find ISelectable under cursor over element's datacontext, if it's ISelectable.IsSelected,
/// assign canDragKey to true, otherwise false.
/// </summary>
/// <param name="canDragKey"></param>
/// <returns></returns>
public static IScriptCommand IfItemUnderMouseIsSelected(IScriptCommand trueCommand = null, IScriptCommand otherwiseCommand = null)
{
return
//Calculate a number of positions.
(HubScriptCommands.ObtainPointerPosition(
//Assign the datacontext item of the UIelement that's undermouse to {ItemUnderMouse}
HubScriptCommands.AssignItemUnderMouse("{ItemUnderMouse}", false,
//And If it's exists and selected,
ScriptCommands.IfAssigned("{ItemUnderMouse}",
ScriptCommands.IfNotAssigned("{ItemUnderMouse.IsSelected}", trueCommand,
ScriptCommands.IfTrue("{ItemUnderMouse.IsSelected}", trueCommand,
otherwiseCommand)), otherwiseCommand))));
}