MATLAB: How to pre-select item in the listbox in the Matlab UI

guilistbox

I am creating the UI using GUIDE. I have one list box and I am populating the list of M files from particular folder using a pushbutton. What I would like to do is when listbox loads the list of M files, It should by default select the first item. Right now what I have to do is once, list of files is loaded, I have to click the file I want and the callback of listbox is selecting the file. I want to automate such that by default first item is selected.

Best Answer

Set the 'Value' for the listbox to 1 at the point when it is populated.

Related Solutions

MATLAB: Listbox count items help

str = get( handles.listbox1, 'String' )
lc = numel( str );

If you want to see all the properties of a UI handle object such as a listbox you can just type:

get( handles.listbox1 )

and it will display all the properties in the command window. You can often use that as a way to work out what property you need.

MATLAB: Linking a pushbutton to two dropdown menus in GUIDE

vedesh - in the pushbutton callback, you would use the handles structure to get the selections from the two dropdown menus. Your code could look something like the following

function pushbutton1_Callback(hObject, eventdata, handles) 
% get the selection from the first drop down menu
popup1List = get(handles.popup1,'String'); % get the list of items of popup1
popup1Index = get(handles.popup1,'Value'); % get the index of the selected item of popup1
popup1Value = popup1List{idx};             % get the value of the selected item of popup1
% get the selection from the second drop down menu
popup2List = get(handles.popup2,'String'); % get the list of items of popup2
popup2Index = get(handles.popup2,'Value'); % get the index of the selected item of popup2
popup2Value = popup2List{idx};             % get the value of the selected item of popup2
% note that popup1Value and popup2Value are strings so you may need to convert to numbers is
% applicable
% do whatever work you need to and draw line on axes

Best Answer

Related Solutions

MATLAB: Listbox count items help

MATLAB: Linking a pushbutton to two dropdown menus in GUIDE

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