Call a Pushbutton within a timer object using guide

Hello. I'm fairly new to using GUIDE so thank you for your patience. I have gui with "Record On/Off" pushbutton which serves to start and stop a timer object. The default setting is therefore infinite in that the timer object will run until the stop button is pressed. Additionally, when pushbutton is pressed to stop the timer, several other processes are performed (e.g., changing the color of the button, preprocessing and saving the data generated during the timer object etc.).

However, I have an optional setting in which the user can specify a custom duration. When a duration is specified, the 'TasksToExecute' is set thus stopping the timer automatically after the duration has elapsed.

The issue is, that because the Recording pushbutton executes several operations in addition to stopping the timer, I need to trigger the button press via the timer's StopFcn. Being a novice with guide, I'm confused about executing callbacks within another call back. I've pasted the relevant sections of code below:

function Record_Callback(hObject, eventdata, handles)
% hObject    handle to Record (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)

RecordStatus = get(hObject,'Value');
runstr=get(hObject,'string');
if RecordStatus == 1
    cla; %clears current axes if applicable
    set(hObject, 'string', 'STOP Recording'); %updates text of record button
    set(hObject, 'ForegroundColor', 'black'); %updates color of record button
    Duration_MS = handles.dur * (60 * handles.hertz); %Pre-allocates duration of recording based on sample rate and time
    if Duration_MS > 0;
        NumExecutions = [handles.dur * 60] / get(handles.tmr, 'Period');
        set(handles.tmr, 'TasksToExecute', NumExecutions);
    end
% does some other cool stuff irrelevant here
    start(handles.tmr); %starts the timer function 
    guidata(hObject, handles);
elseif RecordStatus == 0
    stop(handles.tmr); %stops the timer (and stops recording)
    timeElapsed = toc;
    % does some other cool stuff after the timer is stopped.

Here is the StopFcn which I'd like to figure out how to simulate a button press (i.e. stop recording).

function StopRNG_callback(obj,event,hObject)
handles=guidata(hObject);
disp(['recording should have stopped at ' toc]); %shows when recording ended.
% So here is where I need to call the Record pushbutton callback.  But I don't understand how to execute a callback within another callback. 
guidata(hObject, handles);

Answer 1

[Geoff Hayes]

Daemonic - you should be able to call the callback as you would any other function provided that you pass in the correct parameters (in particular, the handle to the control that you wish to invoke the callback on).

But instead of doing this, why not create a function that has the code common to your two callbacks and invoke that from both? Your code would then look something like

 function Record_Callback(hObject, eventdata, handles)

 RecordStatus = get(hObject,'Value');
 runstr=get(hObject,'string');
 if RecordStatus == 1
    % start recording
 else
    % stop recording
    StopRecording(handles);
 end

In your timer stop function (which perhaps could be named OnTimerStoppedCallback or something similar), you would do

 function StopRNG_callback(obj,event,hObject)
 % stop recording
 StopRecording(guidata(hObject);

Finally, your StopRecording function would do all of the work

 function StopRecording(handles)
 % do stuff...

All the code to stop the recording is in one function that is called by either callback.

[Daemonic]

Fantastic! I'm still tinkering with it, but this solution appears to be working quite well. Thank you!!