Set Data Cursor Text Update Function in GUIDE GUI

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Gregory McFadden 2017-3-14

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https://ww2.mathworks.cn/matlabcentral/answers/329837-set-data-cursor-text-update-function-in-guide-gui

回答： Adam 2017-3-14

I suspect I am just missing something very simple, but I am confused how I set the data cursor text update function in a GUIDE generated GUI. I have the standard menu bar turned on, showing the data cursor button.

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Answer 1

Adam 2017-3-14

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Assuming you didn't change the 'tag' of your GUIDE-created figure (I always change min), you can just do

dcm = datacursormode( handles.figure1 );
dcm.UpdateFcn = @updateDataCursor;

and then define updateDataCursor in the file as

function outputText = updateDataCursor(~,event_obj)

where event_obj has fields 'Target' and 'Position' which you can use to create outputText, for example one I did uses the following:

pos = get( eventObj, 'Position' );
outputTxt = { ['R: ', num2str( round( pos( 1 ), 3 ) )],...
          ['G: ', num2str( round( pos( 2 ), 3 ) )],...
    ['B: ', num2str( round( pos( 3 ), 3 ) )] };