Assigning a hotkey in app designer to activate the push button

Hi

I have a push button in app designer and I want to asign a hotkey (c) to activate it. I used this code but it does n't work. My button name is 'ResponseButtonPushed'

I separately tried

app.ResponseButtonPushed and

ResponseButtonPushed only after Case C.

Where is the issuse in my code?

% Key press function: UIFigure

function UIFigureKeyPress(app, event)

key = event.Key;

switch key

case 'c'

app.ResponseButtonPushed(app,event); %or whatever your function is. This is the name of mine]

end

[Jiri Hajek]

Hi, I use the same syntax as you and never had any problem... While the app window remains in focus, this works.

[Mo]

Hi

I have tried it in R2022b and R2019b and that doesnt work. I use USB keyboard for typing. Is it an issue to use a wireless keyboard?

Answer 1

[Divyanshu]

The interpretation of the description provided is that you want the button to be pushed automatically when the hotkey ‘c’ is pressed. So, proceeding with this understanding->

I have created a sample App using App-designer which has a push button and 2 additional edit fields. The button is automatically pushed when key ‘c’ is pressed on the keyboard.

The edit field ‘Key Pressed’ is for reference to see which key user has pressed on the keyboard.

The 2nd edit field gets value ‘Hello’ when the Button is pushed.

Here is the code view of the App->

methods (Access = private)
    % Key press function: UIFigure
    function activateBtn(app, event)
        key = event.Key;
        app.KeypressedEditField.Value = key;
        switch key
            case 'c'
                app.ResponseButtonPushed();
        end
    end

    % Button pushed function: ResponseButton_2
    function ResponseButtonPushed(app, event)
        app.ButtonPushedEditField.Value = 'Hello';
    end
end

In R2022b you can call the call-back function ’ResponseButtonPushed’ by following the above syntax or also you can follow this syntax when calling the call-back function-> app.ResponseButtonPushed(event);

But this syntax ‘app.ResponseButtonPushed(app, event);’ throws the error ‘too many arguments.’ on both R2022b and R2019b MATLAB versions. You can retry after using any of the above-mentioned syntaxes.