Multiple Callback Functions
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Hello MatLabers
I'm trying to have multiple callback functions executed on a uicontrol callback function.
Usually I go something like this:
obj = uicontrol(...,'style','popupmenu',...
'Callback',@(h,e)this.myfunc(h));
now I would like to not only have myfunc to be executed, but also myfunc2 and myfunc3.
I've tried the following (cell array of function handles):
obj = uicontrol(...,'style','popupmenu',...
'Callback',{@(h,e)this.myfunc(h), ...
@(h,e)this.myfunc2(h), ...
@(h,e)this.myfunc2(h)});
which does not work.
Any idea on how to achieve this? I explicitly do not want to have myotherfunc (which calls myfunc, myfunc2, myfunc3) to be the callback but rather be able to directly assign them to the uicontol (or whatever other callback function)
Thank you
采纳的回答
Daniel Shub
2011-7-1
It is ugly ...
obj = uicontrol(...,'style','popupmenu',...
'Callback', @(h,e)(cellfun(@(x)feval(x,h,e), ...
{@(h,e)this.myfunc(h), ...
@(h,e)this.myfunc2(h), ...
@(h,e)this.myfunc2(h)}))
更多回答（4 个）
Friedrich
2011-7-1
I think this is not possible without using some eval and feval command. I would suggest using only one callback function which calls the other functions:
obj = uicontrol(...,'style','popupmenu',...
'Callback',{@(h,e)this.dummyfunc(h)});
function dummyfunc(h)
this.myfunc(h);
this.myfunc2(h);
this.myfunc3(h);
end
1 个评论
Raymond
2012-7-13
hi..sorry but what is this @(h,e) means and stands for???
Titus Edelhofer
2011-7-1
1 个投票
Hi,
perhaps you could explain why "myotherfunc" would be bad. Perhaps events could help you out (the callback emits an event and you have three listeners who react to this event...?)
Titus
Jan
2011-7-1
I'd create a single callback, which calls the different functions. And if the list of callbacks must be created dynamically, a cell of function handles can be used as input for this wrapper:
fcnList = {this.myfunc, this.myfunc1, this.myfunc2};
obj = uicontrol(...,'style','popupmenu',...
'Callback', {@wrapper, fcnList});
function wrapper(ObjH, EventData, fcnList)
for iFcn = 1:length(fcnList)
feval(fcnList{iFcn}, ObjH, EventData);
end
Thomas Merlo
2021-2-16
0 个投票
try putting all the function names in a single string:
hMenu = gcf;
set(hMenu,'MenuBar','none');
h = uimenu(hMenu,'Label','Multiple Callbacks', 'Callback', 'FuncA; FuncB; FuncC;');
----------
Obviously, you'll want to define these example furnctions first; for A, B, and C, something like:
function FuncA
fprintf('FuncA\n');
return
~ "works on my machine".
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