How to pre-select a value in a list box (GUI)

Question

Yahel Oren 2021-8-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/890122-how-to-pre-select-a-value-in-a-list-box-gui

回答： Image Analyst 2021-8-1

I would like to pre-select a value (lets say - value number 45 in an array is the default value) and when I open the GUI I want that value to be selected (with the blue mark in the list box)

I tried to set the Value to my value but it's not working

Thank you!

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2021-8-1

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/890122-how-to-pre-select-a-value-in-a-list-box-gui#answer_758307

在 MATLAB Online 中打开

You can set the index of the listbox in your startup code, yourApp_OpeningFcn() if you're using GUIDE.

index = 45;
handles.listbox1.Value = 45;

If you prepopulated the listbox with strings and want to find out which one(s) has 45, you can do this:

listBoxItems = handles.listbox1.String;  % e.g. {'4'; '45'; '5'; '45'}
pattern = '45';
indexes = ismember(listBoxItems, pattern) % e.g. 0 1 0 1
handles.listbox1.Value = find(indexes) % e.g. 2 4