How to create a search box in List Box in MATLAB GUI?

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Harsh Mittal 2021-8-13

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回答： Image Analyst 2021-8-13

I have a listbox in my MATLAB GUI, it contains 200 items to select from. I want to add a search option in my listbox so that I can select the items from the list box easily, is there any way to do this?

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Adam Danz 2021-8-13

You can add a textbox to your GUI. The callback of the textbox will update the listbox list by deciding which values are a match to the string in the text box. You may want to use startsWith, endsWith, regexp, regexpi, contains, or another string matching function.

Harsh Mittal 2021-8-13

Thanks I will try this to resolve my issue.

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Answer 1

Image Analyst 2021-8-13

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I agree with Adam. I'd put an edit text box right above the listbox. Maybe with a button beside it if you want. Then in the callback for the edit text box, and the button callback if you have a button, call a function called LoadListBox(). In that function do something like (untested)

function handles = LoadListBox(handles)
% Get the folder you're working in.
folder = handles.folder; % or wherever....
% Get edit text box pattern
filePattern = strtrim(handles.edtSearch.String);
% Prepend the folder.
if isempty(filePattern)
    % Handle case where the edit box is empty.
    filePattern = fullfile(folder, '*.*'); % List all files.
else
    % Case where they entered something into the edit text box.
    % See if they put an extension.  If they didn't, add star.
    if ~contains(filePattern, '.') || endsWith(filePattern, '.')
        % No dot, or else ends with dot but has no extension.  Add wildcard extension.
        filePattern = [filePattern, '.*']; % Append dot star.
    end
    filePattern = fullfile(folder, filePattern);
end
% Call dir to get a list of files matching the filter.
fileList = dir(filePattern);
% Send the list of base file names into the listbox control.
handles.lstFilebox.String = {fileList.name};
% Old Value (from prior folder listing) cannot be greater than the number of files in this folder or
% else the listbox won't appear.  It it's longer, make it 1.
if handles.lstFilebox.Value > length(handles.lstFilebox.String)
    handles.lstFilebox.Value = 1;
end