question about the function of callback

hello, I have a question about the writing the function of callback. # how to callback a group of function? For exemple, We use 'callback' like this way: 'callback', @pushbutton_callback. Here pushbutton_callback is a function. In my interface there is many same functions repeated, Can I realize to write the function of callback like @pushbutton_callback(k), and there is the function of callback related. I know writing directly like pushbutton_callback(k) is not correct. I didn't find something similar. What should I do?

[Andy]

Can you clarify: do you want a single pushbutton to fire off multiple callback functions, or do you want to set the callbacks for all of your pushbuttons in one call?

[zhiping]

I used a loop to create multiple pushbuttons(pushbuttons(k)), and want to use a loop to write his own function ( pushbuttons_callback(k)). thanks in advance.

Answer 1

[Jan]

Function handles cannot be combined in an array due to the konfusion of the indexing and the input arguments. But you can create a cell of function handles:

C = {@sin, @cos, @tan};
for i = 1:3
   feval(C{i}, pi)
   % In modern Matlab versions also directly:
   % C{i}(pi)
end

Similar works for pushbutton_callback{k}.

[zhiping]

Thank you verry much

Answer 2

[Paulo Silva]

If you have several pushbuttons each one with his own function, try this:

hb = uicontrol('Style','pushbutton',...
               'String','PushMe');
set(hb,'Callback',sprintf('pushbutton%d_callback',k))

%for button1
%pushbutton1_callback

This also might work (not tested)

hb = uicontrol('Style','pushbutton',...
               'String','PushMe');
set(hb,'Callback',sprintf('@pushbutton%d_callback',k))

%for button1
%pushbutton1_callback

Answer 3

[Yoav Livneh]

Another option is to do this:

push_button(k) = uicontrol('style','pushbutton',...
'callback',{@pushbutton_callback_main,k});

and the callback function:

function pushbutton_callback_main(obj,event,idx)
% Run pushbutton_callback number idx
eval(['pushbutton_callback' idx]);
end

There's probably a way to do this without eval but can't think of one right now