Controlling GUI through a matlab code

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Hend Faiad 2022-6-4

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回答： Tom Teasdale 2022-6-10

How can I write a matlab code that controls the appearacne of textboxes and button in a GUI?
for instance I want matlab to display n textboxes when I input n to a text box in GUI,How can I do that?

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Benjamin Thompson 2022-6-4

Try looking over the article titled "App Building" in the documentation and see what approach best meets your requirements. Then ask the Community more questions with some sample code of the work you have done or more details about how you would like it to work.

Walter Roberson 2022-6-4

generally speaking if you have a fixed maximum number of them it can sometimes be easier to create them all at design time but make them invisible until needed.

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Answer 1

Tom Teasdale 2022-6-10

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在 MATLAB Online 中打开

Hello,

I understand you want to programatically create a varying number of UI components. Your second question could be implemented as follows. Paste this example into a Live Script to execute it yourself.

gridMain = uigridlayout(...
    'RowHeight', {'fit', '1x'}, ...
    'ColumnWidth', {'1x', 'fit'});
gridTextAreas = uigridlayout(gridMain, ...
    'ColumnWidth', {'1x'}, ...
    'Scrollable', 'on');
gridTextAreas.Layout.Row = [1 numel(gridMain.RowHeight)];
editfield = uieditfield(gridMain, 'numeric', ...
    'ValueChangedFcn', @(~,e) onValueChanged(gridTextAreas,e));
editfield.Layout.Row = 1;
function onValueChanged(gridTextAreas, event)
delete(gridTextAreas.Children);
n = event.Value;
set(gridTextAreas, 'RowHeight', repmat({'fit'},n,1)) 
for i = 1:n
    text = sprintf('This is textarea %i/%i', i, n);
    uitextarea(gridTextAreas, 'Value', text)
end
end

Note that in AppDesigner the implementation of the onValueChanged function handle would look different, as you usually pass the app, then the handle of the object generating the callback and then the event data.