How do I disable a dropdown option?

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hbcukid
hbcukid on 27 Sep 2021
Commented: hbcukid on 29 Sep 2021
On my GUI on the appbuilder I have two dropdown menus with the same options, app.dropdown1 and app.dropdown2. Their Items are a1, a2, a3, and a4. How can I make it so that if I choose an item on dropdown1 it turns the visibility of it off on dropdown2.
Desired output: if dropdown1's value = a1 on dropdown2 only (a2,a3,a4) should be visible

Answers (1)

Voss
Voss on 28 Sep 2021
str = app.dropdown1.String; % store dropdown1's list of options
str(app.dropdown1.Value) = []; % remove the selected one
app.dropdown2.String = str; % apply it to dropdown2
Run those lines in dropdown1's Callback function. You probably also want to update app.dropdown2's Value property.
  3 Comments
Kevin Holly
Kevin Holly on 29 Sep 2021
try app.dropdown1.Items instead of String
hbcukid
hbcukid on 29 Sep 2021
Matrix index is out of range for deletion

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