Thread Subject: GUI button's callback

Can someone explain me this please?

Suppose I set up a callback to a GUI button like this:

set(button_handle,'callback',@my_function)

I noticed that in this case my_function must have at least
2 input arguments, of which the first is button_handle.

My question is, what is the 2nd argument? What do we need
it for?

Thanks,

Yuri

"Yuri Geshelin" <geshelin@hotmail.com> wrote in message
news:g405f5$95h$1@fred.mathworks.com...
> Can someone explain me this please?
>
> Suppose I set up a callback to a GUI button like this:
>
> set(button_handle,'callback',@my_function)
>
> I noticed that in this case my_function must have at least
> 2 input arguments, of which the first is button_handle.
>
> My question is, what is the 2nd argument? What do we need
> it for?

http://www.mathworks.com/access/helpdesk/help/techdoc/creating_plots/f7-55506.html#brdjimp-1

--
Steve Lord
slord@mathworks.com

Let's see, when you progrm GUI from M.file , you can create button, slider, satic text, etc. using:
hImportar = uicontrol('Style','pushbutton',...
            'String','Importar',...
            'Position',[5 120 100 35],...
            'Parent',rightPanel,...
            'Callback',{@Importar_Callback});

Style,String,Position,Callback are property of uicontrol,
and @Importar_Callback ,call the function:

function Importar_Callback(source,eventdata)
   %put here any action of callabck
   %for exmple, clos the gui
   Close
end