How can I avoid displaying "0" in my text box when cancel is pressed using UIGETDIR

Hi,

The dialog box UIGETDIR returns either the selected folder name as a string if OK is pressed or the number 0 if Cancel is pressed. In my application I have an edit box with a callback function that calls UIGETDIR and then displays the selected folder string, something like this:

editboxhandle.callbackfcn = @set(editboxhandle,'String',uigetdir);

However, when Cancel is pressed, "0" is displayed in my edit box but while I would like the string to be empty in such case. I'm am restricted to a singel expression callback like the one above. How can I solve this?

Answer 1

[Azzi Abdelmalek]

k=uigetdir; 
if k==0;
 k=[];
end

[Spigge]

OK, but as I mentioned, I need to be able to do this in a single expression inside the (anonymous type) callback function. Your solution has more than one epression. Nevertheless, I seem to have cracked it myself by using the char command, like this:

editboxhandle.callbackfcn = @char(set(editboxhandle,'String',uigetdir));

When the number 0 is returned by UIGETDIR, char(0) becomes empty.

[Azzi Abdelmalek]

Why do you need to do it in a single line?

k=uigetdir; 
if k==0;
 k=[];
end
editboxhandle.callbackfcn = @char(set(editboxhandle,'String',k))

[Spigge]

http://www.mathworks.se/help/matlab/matlab_prog/anonymous-functions.html