Thread Subject: list box-seletion via mouse

Hi, if I have a list box populated by several items, is it
possible to get a particular item by using the mouse to
select that item (or get the index of the item - using the
mouse to select)?

thanks

Jason

"Jason " <Jbryant@illumina.com> wrote in message
<fvuicr$2tu$1@fred.mathworks.com>...
> Hi, if I have a list box populated by several items, is
it
> possible to get a particular item by using the mouse to
> select that item (or get the index of the item - using
the
> mouse to select)?
>
> thanks
>
> Jason

I'm not sure what you mean. I think what you want to know
about is how to define a "callback" for the listbox. Look
into setting the "Callback" function for the listbox
(search the doc for the term "Callback"). Then, whenever
you click the listbox, your callback function will run.

Within the callback function, you can read the "Value"
property of the listbox to tell what is the index of the
currently selected item. You can read the "String"
property of the listbox to get a list of all elements in
the listbox. Then you can index into the result
of "String" using "Value" to determine the selected element.

OK, some code. First, set the "Callback" property of your
listbox to be "@Listbox_Callback" (without the quotes).
Then, create a function named ListBox_Callback containing
the code:

function ListBox_Callback(hObj,eventdata,handles)
value = get(hObj,'Value'); % Index of selected item
string = get(hObj,'String'); % List of strings
selected = string{value}; % Selected string
...<more code>...

Now, you can do whatever you want with "value"
or "selected".

Good luck!