question about the function of callback
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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?
2 Comments
Andy
on 17 May 2011
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?
Accepted Answer
Jan
on 17 May 2011
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}.
More Answers (2)
Paulo Silva
on 17 May 2011
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
0 Comments
Yoav Livneh
on 17 May 2011
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
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