Enable/disable on radio button in app designer

In App Designer, I have created a radio button group with three buttons. The buttons select which set of data to graph. Call the three buttons Choice1, Choice2, and Choice3.

If a certain selection of other controls is made in the app, I want to disable the Choice2 and Choice3 buttons and force the selected button to be Choice1.

If different set of selections is made, I want to re-enable the other Choice2 and Choice3 buttons and allow them to be selected.

Is it possible to do this? If so, how?

Answer 1

[Walter Roberson]

You can create app.bg as a uibuttongroup and populate it with uiradiobutton .

Later, you can

bc = [app.bg.Children];
set(bc(1:end-1), 'Enable', 'off')
bc(end).Enable = 'on';
app.bg.SelectedObject = bc(end);

to enable the first button and disable the other objects.

To restore,

bc = [app.bg.Children];
set(bc, 'Enable', 'on');
app.bg.SelectedObject = bc(end);

[Jim McIntyre]

Thank you. This was very helpful.

It turns out that when I created my buttons the one I want to keep enabled is number 3. So the code I've found that works is:

bc = [app.bg.Children];
set(bc(1:2), 'Enable', 'off')   % Disable buttons 1 and 2
bc(3).Value = 1;                % Force button 3 to be selected

and to re-enable:

bc = [app.bg.Children];
set(bc, 'Enable', 'on');        % Enable buttons 1 and 2

In the actual calback function, the only code I'm using is a call to the graphing function (which is also called by other callbacks). Within the graphing function, I'm using a switch to determine which button was selected.

switch app.bg.SelectedObject.Text
    case "Choice1"                    
    case "Choice2"
    case "Choice3"
end

This seems a little clunky, but the alternative would be dealing with the array of app.bg.Children.Value, which might look like this [0, 1, 0]. Is there a better way to get the choice numerically (that wouldn't break if the texts changed)?

[Walter Roberson]

You could set the UserData property of each of the button children, set it to an index. Then

app.bg.SelectedObject.UserData

would give you the index

Or you could

[tf, idx] = ismember(app.bg.SelectedObject, app.bg.Children);

and then if tf is true, idx would be the index in reverse creation order (e.g, if there were 3 children then index 3 would correspond to the first created.)

[Jim McIntyre]

Thank you for the additional suggestions.