Function to copy to clickboard in App Designer?

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Michael P
Michael P 2025-7-20
编辑： Matt J 2025-7-21
I am making an application that outputs results in Edit Fields (both text and numeric). I would like to add a function that automatically copies the contents of an Edit Field to the clipboard when the Edit Field is selected (clicked). However, I do not see a callback function for Edit Fields like "ClickedFcn" for Drop Down lists.
Is it possible to do this directly or perhaps via some workaround?
  2 个评论
dpb
dpb 2025-7-20
I've never gotten fancy enough to use them, but the workaround I can think of would be to put the control in a panel that does have the callback. How well it would suit your appication, I don't know...
Michael P
Michael P 2025-7-20
The best solution I've come up with is to add a button next to the Edit Field and use the ButtonPushedFcn callback with the clipboard function.
function ButtonPushedFcn(app, event)
clipboard('copy',value)
end
It's a good solution but it would be nice to not have to eat up screen real estate.

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采纳的回答

Matt J
Matt J 2025-7-20
编辑：Matt J 2025-7-20
Implement a WindowButtonDownFcn callback for the UIFigure canvas,
function CanvasButtonDown(app, event)
clickedComponent = app.UIFigure.CurrentObject;
if clickedComponent == app.MyEditField
% This code runs when the edit field is clicked
disp('Edit field was clicked');
clipboard('copy' , app.MyEditField.Value);
end
end
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Matt J
Matt J 2025-7-21
编辑：Matt J 2025-7-21
I don't see any option for a CanvasButtonDown callback
Youi want to set the WindowButtonDownFcn callback in the Component browser (see below). 'CanvasButtonDown' is just a hypothetical name I assigned for the function signature. The name appearing in the function signature of a callback can be anything you want.
There seems to be an issue because the Edit FIeld in question is inside of a Grid Layout, which is itself inside of a Tab, which is in turn inside of a Tab Group.
Doesn't seem to be an issue for me. I've attached a minimal working example app to illustrate.
Michael P
Michael P 2025-7-21
This worked! Thank you for the clear explanation.

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