Break loop with button click Appdesigner GUI [Both plot and button are in different callback functions]

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shubham kumar gupta
shubham kumar gupta 2020-11-23
评论： Jan 2020-12-7
I have a GUI MATLAB
I have a button
and there is a loop like this
function RUN()
t=1:0.01:3600;
for i=1:numel(t)
y(1,i)=readValue();
plot(t(1:i),Tco(1:i));
pause(0.02)
end
end
function BUTTON_PRESS()
%BREAK FROM THAT LOOP
end
I want to break this loop when I click my button

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采纳的回答

Jan
Jan 2020-11-24
编辑：Jan 2020-11-24
function main
FigH = figure;
ButtonH = uicontrol(FigH, 'Style', 'PushButton', 'String', 'Stop',
'Callback', @ButtonPressed, 'UserData', 0);
RUN(ButtonH);
end
function ButtnPressed(ButtonH, EventData)
ButtonH.UserData = 1;
end
function RUN(ButtonH)
t = 1:0.01:3600;
for i = 1:numel(t)
y(1,i) = readValue();
plot(t(1:i), Tco(1:i));
pause(0.02);
if ButtonH.UserData
break;
end
end
end
If there is really no chance to obtain a clean providing of the button's handle, use the tag to find it dynamically - but this is less nice:
function main
FigH = figure;
ButtonH = uicontrol(FigH, 'Style', 'PushButton', 'String', 'Stop', ...
'Callback', @ButtonPressed, 'UserData', 0, ...
'Tag', 'myUniqueButtonTag_in: main.m');
RUN();
end
function ButtnPressed(ButtonH, EventData)
ButtonH.UserData = 1;
end
function RUN()
ButtonH = findobj(allchild(groot), 'Tag', 'myUniqueButtonTag_in: main.m');
... same as above
end
Care for the situation, where two figures are existing or none, e.g. by:
function RUN()
ButtonH = findobj(allchild(groot), 'Tag', 'myUniqueButtonTag_in: main.m');
if numel(ButtonH) > 1
warning('Multiple stop buttons found.')
end
...
if ~isempty(ButtonH) && any([ButtonH.UserData])
end
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更多回答（1 个）

Voss
Voss 2020-11-23
You can define a variable that says whether the button has been clicked. Set the value of that variable in your button's callback function. Check the value of that variable on each iteration of your for loop, and if it says the button has been clicked, break out of the loop.
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shubham kumar gupta
shubham kumar gupta 2020-12-1
编辑：shubham kumar gupta 2020-12-1
NO HELPED!! Tried unable to stop loop even changing the name flag to RUN_PLOT_GUI___flag_to_stop_plotting_loop_if_true!!
Rik
Rik 2020-12-1
Changing the name will not solve anything if your code is not working in the first place. It is a good habit.
Instead of holding down the shift button while typing on this forum (which is considered SHOUTING and impolite), did you try using breakpoints to debug your code?

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