Calling Matlab GUI popupmenu callback on click

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Aalaas
Aalaas 2016-10-4
回答： Jan 2019-7-23
Hi,
I would like to update the options that should be shown in a popupmenu of a Matab GUI each time it is clicked on it. When I implement this functionality in the callback function, it only works when one of the choices is selected, not when the down arrow is clicked.
Is there any way to create a callback function that works when the down arrow is clicked, before selecting any of the options of the menu?
Thanks!!

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回答（2 个）

Joe Yeh
Joe Yeh 2016-10-4
This question has already been asked before and there's a rather detailed explanation.
Please see the link : How to pass data from one GUI to another?
Jan
Jan 2019-7-23
No, there is no callback in the Matlab level.
You can use the Java callbacks, if your "Matlab GUI" is a figure, see https://undocumentedmatlab.com/blog/uicontrol-callbacks , but I do not know a method for uifigure windows.
I have simulated a popup menu in a similar case by a uicontextmenu and some graphical elements, which look like a popup. It works, but actually it is the porgrammers hell to emulate standard GUI elements.

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