How to record time and position of a mouse cursor simultaneously and save it in file using "GUIDE"?

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Franck paulin Ludovig pehn Mayo 2022-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/1651270-how-to-record-time-and-position-of-a-mouse-cursor-simultaneously-and-save-it-in-file-using-guide

评论： Franck paulin Ludovig pehn Mayo 2022-2-22

采纳的回答： Geoff Hayes

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I am trying to record time and position each time the mouse is moving on the canvas in Guide and save it in file....

In appdesigner, it's something like the link below.(I know Guide is going to be deleted in the future release but appdesigner is just short on what i am doing). This code is not working on Guide, any help please?

clear
clc
fileID = fopen('exp.txt','w');
t = timer('ExecutionMode', 'fixedRate', ...
          'Period', 0.05, ...
          'TasksToExecute', Inf, ... 
          'TimerFcn', @(~,~) fprintf(fileID,'(X, Y, time) = (%g, %g, %s)\n', get(0, 'PointerLocation'), datetime('now') ));
start(t);
%stop(t) %whenever we want to stop.
%fclose(fileID);

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采纳的回答

Geoff Hayes 2022-2-16

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https://ww2.mathworks.cn/matlabcentral/answers/1651270-how-to-record-time-and-position-of-a-mouse-cursor-simultaneously-and-save-it-in-file-using-guide#answer_897760

在 MATLAB Online 中打开

@Franck paulin Ludovig pehn Mayo if you need to use GUIDE, you could do the following in whatever callback that would start the recording (I suspect the issue is that the fileID is unknown when the code tries to write to file)

handles.fileID = fopen('exp.txt','w');
handles.t = timer('ExecutionMode', 'fixedRate', ...
          'Period', 0.5, ...
          'TasksToExecute', Inf, ... 
          'TimerFcn', {@timerCallback, handles.fileID});
start(handles.t);
guidata(hObject,handles); % ----> do this to save the updated handles object

Your callback would then look like

function timerCallback(~,~,fileID)
fprintf(fileID,'(X, Y, time) = (%g, %g, %s)\n', get(0, 'PointerLocation'), datetime('now'));

In whatever callback (or exit) function that you wish to stop the timer and close the file, then you would do the following (here I'm assuming in the exit function)

% --- Executes when user attempts to close figure1.
function figure1_CloseRequestFcn(hObject, eventdata, handles)
% hObject    handle to figure1 (see GCBO)
% eventdata  reserved - to be defined in a future version of MATLAB
% handles    structure with handles and user data (see GUIDATA)
stop(handles.t) %whenever we want to stop.
fclose(handles.fileID);
% Hint: delete(hObject) closes the figure
delete(hObject);