About listbox item selection: If i have two boxes how can i know from which one the cursor has selected?

I have two listboxes : listbox1 containing lines,and listbox2 containing cercles. And i have a button "Set" (as described in the image) to set the thikness of the selected item(line or circle). So, in the function "Set" it's written this : num =handles.selected % the value selected by the cursor is called num. e(num)=thiknss % Then we give this value a thikness. Now my problem is that i want to know from which box the "num" is selected.I need to know if it's from the box 1 ( a line) or the box2 (a circle). How can i do that?

Answer 1

[Image Analyst]

That is not a good situation to use listboxes in. You are expecting to take some action based on a single selection, however you will always have two selections because you have two listboxes. You should use either radio buttons, or a popup (drop down list).

[bh dhouha]

Ok supoose that i have only one listbox in which the list is "line1, arc1, acr2, line2, line3....." ,when i click on an item for example "line2",how can i return a variable containing "line2" and not the order of the item in the list? If i do this i will be able to check if the item selected is from the first or the second box.

[Image Analyst]

Try this:

% Get item name
selectedItem = get(handles.lstListbox, 'value');
numberOfItemsSelected = length(selectedItem);
% If more than one is selected, bail out.
if numberOfItemsSelected > 1
  return;
end
% If only one item is selected, get it's name.
allItemNames = get(handles.lstListbox, 'string');
selectedItemName = allItemNames{selectedItem};

[bh dhouha]

[bh dhouha]

great answer but there is a little problem in the line selectedItemName = allItemNames{selectedItem} tha ti don't understand.Can you correct it please?

[Image Analyst]

Sorry - I think there's some discrepancy if there is just one item in there in that it mgiht return a string instead of a cell array. Try this instead - I think it might work in both cases:

whos allItemNames
selectedItemName = char(allItemNames(selectedItem));

If not, tell me what shows up in the command window after the whos command runs.

[bh dhouha]

This is the result below, it is approximitely the same with the previous code.It the returns an "L" which is the first letter of the selected item "line2" which i selected. So i need to return a [1,5] array to have all the word "line2" returned. I searched about this but i didn't find how to return the first 5 letters of the word.

[Image Analyst]

Final try. Try this:

selectedItemName  = strcat(cell2mat(allItemNames(selectedItem)));

If that doesn't work, upload your fig file and m-file.