Hey Brandon,
You can try using the following approach to block drawnow from executing callbacks:
I have introduced a global flag ALLOW_CALLBACKS to control whether the callback function should proceed with its intended action or simply return without doing anything. This way you can disable the callback during critical sections of the code programmatically. Here is a dummy example code:
function CallbackTest(Do_TCPIP)
% Initialize control flag
global ALLOW_CALLBACKS;
ALLOW_CALLBACKS = true;
% Initialize the GUI
hFigure = uifigure('Name', 'Callback Control Test');
uibutton(hFigure,ButtonPushedFcn=@ACallBack);
% Initialize TCP/IP setup if requested
if Do_TCPIP
echotcpip("on", 4000); % Enable echo server for testing
t = tcpclient("localhost", 4000);
end
% Critical section where callbacks should not interrupt
ALLOW_CALLBACKS = false;
for n = 1:20 % Example critical loop
fprintf('Critical operation in progress: Iteration %d\n', n);
if Do_TCPIP
% Simulate a critical TCP/IP operation
writeline(t, "This is a critical message.");
response = readline(t); % Assuming echo server, expect immediate response
fprintf('TCP/IP Echo Response: %s\n', response);
end
pause(1); % Simulate time-consuming operation
end
%Callbacks re-enabled
ALLOW_CALLBACKS = true;
% Wrap up...
if Do_TCPIP
clear t; % Close and clear the TCP/IP connection
echotcpip('off'); % Disable echo server
end
delete(hFigure); % Close the GUI
fprintf('Critical section completed. Callbacks re-enabled.\n');
end
function ACallBack(~,~)
global ALLOW_CALLBACKS;
if ~ALLOW_CALLBACKS
fprintf('Callback execution is currently disabled.\n');
return;
end
% Callback code that should be executed when allowed
fprintf('Callback executed: Main loop potentially interrupted.\n');
end
I hope this helps!
