MATLAB Central Newsreader - call "callback function" again

call "callback function" again

ching l — Thu, 24 Jul 2008 17:26:01 -0400

function pushbutton9_Callback(hObject, eventdata, handles)

if handles.randValue <=5

;

else

wavplay(ssamples{handles.randValue}{:}) ;

end

Instead of "doing nothing" when the handles.randValue <=5,
how do I call the "callback function" again? I want it
persistently call the "callback function"

if handles.randValue <=5

set(hObject, 'Callback', '');

this is what I tried, but not right...

Re: call "callback function" again

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) — Thu, 24 Jul 2008 17:38:51 -0400

In article <g6adv9$4do$1@fred.mathworks.com>,
ching l <chinglnc@hotmail.com> wrote:
>function pushbutton9_Callback(hObject, eventdata, handles)

>if handles.randValue <=5
>;
>else
>wavplay(ssamples{handles.randValue}{:}) ;
>end

>Instead of "doing nothing" when the handles.randValue <=5,
>how do I call the "callback function" again? I want it
>persistently call the "callback function"

>if handles.randValue <=5
> set(hObject, 'Callback', '');
>this is what I tried, but not right...

function pushbutton9_Callback(hObject, eventdata, handles)
  if handles.randValue <= 5
    cb = get(hObject, 'Callback');
    cb{1}(hObject, eventdata, handles);
  else
    wavplay(ssamples{handles.randValue}{:});
  end

This code does what you asked; unfortunately what you asked for
is highly unlikely to be useful for anything other than crashing
your program with a complaint about the recursion limit being
exceeded.

Wouldn't it be wiser to at least change the value of handles.randValue
before calling the same routine again?

--
  "Is there any thing whereof it may be said, See, this is new? It hath
  been already of old time, which was before us." -- Ecclesiastes

Re: call

ching l — Thu, 24 Jul 2008 18:09:01 -0400

roberson@ibd.nrc-cnrc.gc.ca (Walter Roberson) wrote in
message <g6aenb$ki4$1@canopus.cc.umanitoba.ca>...
> In article <g6adv9$4do$1@fred.mathworks.com>,
> ching l <chinglnc@hotmail.com> wrote:
> >function pushbutton9_Callback(hObject, eventdata, handles)
>
> >if handles.randValue <=5
> >;
> >else
> >wavplay(ssamples{handles.randValue}{:}) ;
> >end
>
> >Instead of "doing nothing" when the handles.randValue <=5,
> >how do I call the "callback function" again? I want it
> >persistently call the "callback function"
>
> >if handles.randValue <=5
> > set(hObject, 'Callback', '');
> >this is what I tried, but not right...
>
> function pushbutton9_Callback(hObject, eventdata, handles)
> if handles.randValue <= 5
> cb = get(hObject, 'Callback');
> cb{1}(hObject, eventdata, handles);
> else
> wavplay(ssamples{handles.randValue}{:});
> end
>
>
> This code does what you asked; unfortunately what you
asked for
> is highly unlikely to be useful for anything other than
crashing
> your program with a complaint about the recursion limit being
> exceeded.
>
> Wouldn't it be wiser to at least change the value of
handles.randValue
> before calling the same routine again?
>
> --
> "Is there any thing whereof it may be said, See, this is
new? It hath
> been already of old time, which was before us." --
Ecclesiastes

Sorry if the question is confusing,

I have two group of similar callback function:

function group1_CreateFcn(hObject, eventdata, handles)

[audio, fs] = wavread('F:\matlab_gui\speech');
ssamples{1} = {audio, fs};
[audio, fs] = wavread('F:\matlab_gui\gtr');
ssamples{2} = {audio, fs};

%all the way up to {99}
%*******

function group2_CreateFcn(hObject, eventdata, handles)

[audio, fs] = wavread('F:\matlab_gui\speech');
ssamples{100} = {audio, fs};
[audio, fs] = wavread('F:\matlab_gui\gtr');
ssamples{101} = {audio, fs};

%*******

so when I do this for both;

handles.randValue = ceil(length(ssamples)*rand);

the Group 2 essentially generate the rand value for Group 1
also, which is something that I don't want.

So, I want to limit group 2 so that the handles.value only
start from {100} onwards.

The only way that I can thought of is to call the
CallFunction of Group 2 when handles.value is larger than {99}.

Or is there any better way to do it? The reason that I break
into two groups is that the push button has great latency
for Group 1 (which was originally more than 150 files).

please advice.