This might be what you're looking for.
HitTest — Ability to become current object 'on' (default) | on/off logical value Ability to become current object, specified as 'on' or 'off', or as numeric or logical 1 (true) or 0 (false). A value of 'on' is equivalent to true, and 'off' is equivalent to false. Thus, you can use the value of this property as a logical value. The value is stored as an on/off logical value of type matlab.lang.OnOffSwitchState.
'on' — Sets the current object to the Figure when the user clicks the component in the running app. Both the CurrentObject property of the Figure and the gco function return the Figure as the current object.
'off' — The current object does not update when the user clicks the figure in the running app.