How to enable a button after x seconds in MATLAB GUI?

Hi,

I am recording an audio. I have a start button and a stop button in GUI. When someone clicks start, the audio starts getting recorded.

Now, I want to enable the stop button only after x seconds. Where x could be 0.5 seconds, 1 seconds or whatever. How could I know that x seconds have passed and now its time to turn on the stop button.

Basically, I don't know how to start a clock and obtain its value. Can someone please help me with it?

Thank you.

Answer 1

[Paulo Silva]

function testtimebutton
figure

t = timer('TimerFcn','nan;','StopFcn',@endtimer, 'startdelay',... 2,'ExecutionMode','singleshot');

pbh1 = uicontrol(gcf,'Style','pushbutton','String','Start timer',...
    'Position',[10 90 60 40],...
    'callback',@stimer);

pbh2 = uicontrol(gcf,'Style','pushbutton','String','Button',...
    'Position',[10 30 60 40],...
    'enable','off','callback','disp(''You pressed the Button'')');

      function endtimer(obj,event)
          set(pbh2,'enable','on')
          disp('timer stopped, Button enabled')
      end

      function stimer(obj,event)
          start(t)
          disp('timer started')
          set(pbh2,'enable','off')
      end

end

[Matlab Help Seeker]

Dear Paulo,

Actually I have a toggle button. When I click on it first time, it starts recording. The next time you click it, it will stop recording.

function togglebutton1_Callback(hObject, eventdata, handles)

button_state = get(hObject,'Value');

if button_state == get(hObject,'Max')

recorder = audiorecorder(8000,8,1);

record(recorder);

set(handles.togglebutton1,'String','Stop Recording');

handles.recorder=recorder;

guidata(hObject,handles);

elseif button_state == get(hObject,'Min')

recorder=handles.recorder;

stop(recorder);

samples = getaudiodata(recorder,'uint8');

set(handles.togglebutton1,'String','Start Recording');

end

But what I want is that when you click on it for the first time, it starts recording. Then you can't press the button for 2 seconds. After 2 seconds, you can press the button to stop recording. This will make my recording duration of atleast 2 seconds. Also, the recording could be greater than 2 seconds but the recording shouldn't be less than 2 seconds.

So, what I want is when you click on the togglebutton, it starts recording. Then the togglebutton gets disabled (enabled=off) for 2 seconds. After atleast 2 seconds or more than 2 seconds recording, you can press the togglebutton again to stop recording.

[Paulo Silva]

%code to start recording and start record

set(hObject,'enable','off')

pause(2)

set(hObject,'enable','on')

%now the user can click again on the button

Answer 2

[Fangjun Jiang]

You can use the MATLAB timer object. Follow this