how can i have a button in one callback function pause the execution of another callback function

Question

Joseph Kutteh 2021-5-27

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/841400-how-can-i-have-a-button-in-one-callback-function-pause-the-execution-of-another-callback-function

编辑： Adam Danz 2021-6-1

function pushbutton1_Callback(hObject, eventdata, handles)
%when this button is pressed i want the code that is executing in
%pushbutton2 to pause
end
function pushbutton2_Callback(hObject, eventdata, handles)
%some code
end
%i am using matlab version R2019b
%Thank you

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Adam Danz 2021-5-27

编辑：Adam Danz 2021-5-27

@Joseph Kutteh this question doesn't differ much from the question you asked earlier this week and never replied to:

how to have a callback function terminate another callback function in a GUIDE gui

And it's no surprise that both questions describe the same solution with some minor differences.

How many people do you want working on your problem? Please take some time to learn from the solutions and if you've got follow-up questions, leave comments.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Jan 2021-5-27

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/841400-how-can-i-have-a-button-in-one-callback-function-pause-the-execution-of-another-callback-function#answer_710655

编辑：Jan 2021-6-1

在 MATLAB Online 中打开

% Initialize in the CreateFcn: handles.Pause = false
function pushbutton1_Callback(hObject, eventdata, handles)
handles.Pause = (hObject.Value == 0);
guidata(hObject, handles);
end
function pushbutton2_Callback(hObject, eventdata, handles)
for k = 1:1000
   disp(clock);  % <-- This is the pseudo code
   pause(0.5);   % <-- Insert your real computations instead
   
   % If button1 was pressed, stay in this loop:
   while handles.Pause  % [EDITED] WHILE instead of IF ?!
      handles = guidata(hObject);
      pause(0.2);
   end
end
end

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Jan 2021-6-1

I do not understand, what you are asking for. I've marked the dummy lines now, which I have inserted instead of the real computations.

Adam Danz 2021-6-1

编辑：Adam Danz 2021-6-1

The while loop in Jan's answer 'pauses' execution if the pause-flag is set to true. This flag is set by pressing pushbutton1 which must be a togglebutton that has a binary state (on/off) (see the pushbutton1_Callback function in Jan's answer).

Note that execution isn't really paused. It's just stuck in the while loop until it gets the signal to escape.

Before you sink too much time into a GUI that appears to be created by GUIDE, note that,

>The GUIDE environment will be removed in a future release. After GUIDE is removed, existing GUIDE apps will continue to run in MATLAB® but they will not be editable in GUIDE - noted in r2021 documentation.

Other ways to implement pauses in Apps/GUIs.

waitfor - example using AppDesigner but can be implemented outside of AppDesigner, too.
uiprogressdlg with the Indeterminate option (requires uifigure which excludes GUIDE GUIs)