MATLAB: How to compose a formula in a GUI

gui selection

Hello,
In my GUI a have a list box (lstVariables) with variable names and an edit box (txtEditor) where I want to write a formula. When I click in the list box, I want to add the selected variable in the edit box. The difficulty is that I want to add it on the place where the cursor was.
Example : I have in the edit box the text : "var1 + var2 + var3", I select in the edit box "var2" (so it's highlighted) and than I click in the listbox on var4. The result should be : "var1 + var4 + var3". How can I find which part of the edit box is selected ?
My Example code up to now :
function lstVariables_Callback(hObject, eventdata, handles)
varnames = cellstr(get(hObject,'String')) 
varname =  varnames{get(hObject,'Value')} 
set(handles.txtEditor,'String',varname);
All help is appreciated.
Best regards,
Luc.

Best Answer

You will have to work at the Java level for this, in order to find out what was highlighted. I recommend that you look at Yair Altman's site, http://undocumentedmatlab.com
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