bool TrySetMouseOver(ISelectable selection, RayQueryResult?ray)
{
//validate
if (selection == _mouseOver)
{
if (selection == null || !selection.SelectSubObject() || (ray != null && _mouseOverArg != null && _mouseOverArg.SubObject == ray.Value.SubObject))
{
return(false);
}
}
var e = new MouseSelectingArgs()
{
Ray = ray
};
if (ray.HasValue)
{
e.SubObject = ray.Value.SubObject;
}
//fire events
_mouseOver?.MouseExited();
_mouseOver = selection;
_mouseOverArg = e;
_mouseOver?.MouseEntered(e);
return(true);
}
bool TrySetSelection(ISelectable selection, RayQueryResult?ray)
{
//validate
if (selection == _selection)
{
if (selection == null || !selection.SelectSubObject() || (ray != null && _selectionArg != null && _selectionArg.SubObject == ray.Value.SubObject))
{
return(false);
}
}
//see if selectable is OK with selection
var e = new MouseSelectingArgs()
{
Ray = ray
};
if (ray.HasValue)
{
e.SubObject = ray.Value.SubObject;
}
selection?.MouseSelecting(e);
if (!e.Select) //selection not allowed
{
return(false);
}
//fire selection events
_selection?.MouseUnselected();
_selectionArg = e;
var prevSelection = _selection;
_selection = selection;
//swap inputReceivers
var inputReceiver = prevSelection as IInputReceiver;
if (inputReceiver != null)
{
_inputManager.Remove(inputReceiver);
}
inputReceiver = _selection as IInputReceiver;
if (inputReceiver != null)
{
_inputManager.Add(inputReceiver);
}
//request excusive mouse access while selected
_inputPermissions.RequestExclusiveMouse = _selection != null;
return(true);
}