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Creating a delete button in App Designer

Asked by Leah Griffiths on 17 Apr 2019
Latest activity Answered by Geoff Hayes
on 17 Apr 2019
Hello!
I'm relatively new to MATLAB and programming. I'm making a simulation in App Designer to mimic a keypad interface.
I have buttons from 0-9, a clear all button, a delete button an output button that displays the text inputted and takes you to another app window when the output button is pushed.
What should I write in the delete button callback so that when the delete button is pushed it deletes the last character in the output display?
Here is what I have so far...
% Button pushed function: 1Button
function 1ButtonPushed(app,event)
str = strcat(app.OutButton.Text, '1');
app.OutButton.Text = string(str);
end
% Button pushed function: 2Button
function 2ButtonPushed(app, event)
str = strcat(app.OutButton.Text, '2');
app.OutButton.Text = string(str);
end
% Button pushed function: 3Button
function 3ButtonPushed(app, event)
str = strcat(app.OutButton.Text, '3');
app.OutButton.Text = string(str);
end
% And so on for the rest until 0...
% Button pushed function: ClearButton
function ClearButtonPushed(app, event)
app.OutButton.Text = '';
end
% Button pushed function: DelButton
function DelButtonPushed(app, event)
???
end
% Button pushed function: OutButton
function OutButtonPushed(app,event)
app2
closereq;
end

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1 Answer

Answer by Geoff Hayes
on 17 Apr 2019
 Accepted Answer

Leah - your delete button callback could look something like
function DelButtonPushed(app, event)
app.OutButton.Text = app.OutButton.Text(1:end-1);
end
I'm assuming that app.OutButton.Text is just a string that we can then remove the last character from.

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