GUI question:Change data depending on ListBox choice

Hi,

I want to change the color of the button "Pass" according to the choice of the listBox as shown by the code below:

function list_VIN_Callback(hObject, eventdata, handles) 
if strcmp(get(handles.list_VIN,'String'), '...............< Aucun >.............') 

    set(handles.Pass, 'BackgroundColor','red'); 

   else 
    set(handles.Not_Pass, 'BackgroundColor','green'); 
end;

Is this correct what I wrote as code? it deosn't work!

[Adam]

You are setting the BackgroundColor of two different buttons in that code, but you only seem to have one button. What is the tag of the 'Pass' button?

[Samah EL QASSAH]

Thank you to notify me, I corrected the code

function list_VIN_Callback(hObject, eventdata, handles) 
if strcmp(get(handles.list_VIN,'String'), '...............< Aucun >.............') 

    set(handles.Pass, 'BackgroundColor','red'); 

   else 
    set(handles.Pass, 'BackgroundColor','green'); 
end;

When I make a choice VIN1, VIN2 or VIN3 the button "Pass" becomes green but when I chose "....<Aucun>....the" Pass "button does not become red.

%

Answer 1

[ES]

What is the tag of the pass button? I think you are trying to set both the 'String' and 'BackgroundColor' property. If yes, you are doing it the wrong way. You can only set properties to a object by using its unique tag.

[Samah EL QASSAH]

The tag of "Pass" button is Pass

Answer 2

[ES]

% get(handles.listbox1,'String') returns listbox1 contents as cell array. So the 'if' will not work.

You should instead get the selected content by using

% Hints: contents = cellstr(get(hObject,'String')) returns listbox1 contents as cell array
%        contents{get(hObject,'Value')} returns selected item from listbox1

The strcmp should be done on contents{get(hObject,'Value')}