Listbox MATLAB GUI issue : How to pass two list box values to the 3rd listbox

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Tania 2015-9-16

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/243303-listbox-matlab-gui-issue-how-to-pass-two-list-box-values-to-the-3rd-listbox

编辑： Tania 2015-9-19

采纳的回答： Walter Roberson

Hi everyone,

I am trying to pass 2 list box values to the third list box but it seems I am not getting what I am looking for.

Can anyone guide me in this matter please.

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采纳的回答

Walter Roberson 2015-9-16

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/243303-listbox-matlab-gui-issue-how-to-pass-two-list-box-values-to-the-3rd-listbox#answer_192538

In the place you fetch the strings and values for the listboxes, also fetch the Enable property, and if it is not on then use the value (index) for the first listbox to index the second listbox as well.

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Walter Roberson 2015-9-16

在 MATLAB Online 中打开

function pushbutton1_Callback(hObject, eventdata, handles)
str1 = cellstr(get(handles.listbox1, 'string'));
val1 = get(handles.listbox1, 'value');
str2 = cellstr(get(handles.listbox2, 'string'));
val2 = get(handles.listbox2, 'value');
if isempty(val1)
   selection1 = '';
 else
   selection1 = str1{val1};
end
enable_state2 = get(handles.listbox2, 'Enable');
if ~strcmp(enable_state2, 'on')
  val2 = val1;
end
if isempty(val2)
   selection2 = '';
 else
   selection2 = str2{val2};
end
combined_selection = {selection1; selection2};
set(handles.listbox3, 'string', combined_selection);

Tania 2015-9-17

Great help.

Thank you very much.

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