GUI keyboard shortcut without using keypressfcn

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Yukai Xu 2022-8-22

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https://ww2.mathworks.cn/matlabcentral/answers/1782940-gui-keyboard-shortcut-without-using-keypressfcn

评论： Yukai Xu 2022-9-6

Hello!

I want to create keyboard shortcuts for a GUI program, but it only appears inspector when I attempt to view callbacks, its .m file is not using callback handles to construct the GUI. The reason and solution HERE do not apply to my case. So the methods illustrated HERE are not working.

Is there a way I can create shortcuts without keypressfcn? Maybe by indexing the object tag?

Any help would be highly appreciated!

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Walter Roberson 2022-8-24

When you use Guide, you need to consider two different items.

The m file holds a couple of header functions, and then contains source code to implement the callbacks. The content of the callback implementation can be modified with any text editor, including outside of the control of Guide. Guide might be needed to connect the controls to the implementation when new functions are added.

The fig file is really a .mat file with a few special variables stored in it, including a figure() object. The graphics objects such as axes and uicontrol have various callback properties. When the callback is actie, what is really done is whatever is stored in the graphics object. Typically what is stored with the graphics object by Guide is a call that retrieves the gui handle object and calls into the function named by the m file name, passing in a character vector containing the name of the implementation function, and passing in the callback parameters, and the gui handles. But if you edit function names in the m file or especially if you rename the m file and fig file without going through Guide, then the m file and graphics object can get out of synchronization.

Occasionally, it can be necessary to examine the properties of the graphics object to see what callback properties are really stored there.

App Designer works a quite different way.

Bruno Luong 2022-9-6

Can you just load the fig file in GUIDE and uncheck the option 'Generate FIG file only'?

Yukai Xu 2022-9-6

Thank you for you advice! @Bruno Luong

Unfortunately, the buttons in my program work with original functions (in the mfile I described with no callbacks), so when MATLAB generates a new mfile for the GUI, I can actually find the callback functions and the buttons are assigned to these callbacks now, but apparently the GUI is controlled by blank functions now and my original mfile is not involving.

Seems I still have to reconstruct the GUI on the new mfile, thank you for all the help!

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