How can I execute a double-click callback without executing the single-click callback in my MATLAB GUI?

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MathWorks Support Team 2011-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/96424-how-can-i-execute-a-double-click-callback-without-executing-the-single-click-callback-in-my-matlab-g

回答： CAM 2015-3-26

In order to set a double-click callback for my figure, I must set the SelectionType property to "open." However, when I double-click on my figure, MATLAB cycles the SelectionType through "normal" while I am clicking. This triggers my single-click callback. Thus both callbacks are executed instead of only my double-click callback.

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Answer 1

MathWorks Support Team 2011-12-5

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https://ww2.mathworks.cn/matlabcentral/answers/96424-how-can-i-execute-a-double-click-callback-without-executing-the-single-click-callback-in-my-matlab-g#answer_105777

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You can use the following sample code to cause your application to execute only the double-click callback:

Associate this function with 'WindowButtonDownFcn' callback of the figure window.

function clickcallback(obj,evt)
persistent chk
if isempty(chk)
      chk = 1;
      pause(0.5); %Add a delay to distinguish single click from a double click
      if chk == 1
          fprintf(1,'\nI am doing a single-click.\n\n');
          chk = [];
      end
else
      chk = [];
      fprintf(1,'\nI am doing a double-click.\n\n');
end

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Answer 2

CAM 2015-3-26

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https://ww2.mathworks.cn/matlabcentral/answers/96424-how-can-i-execute-a-double-click-callback-without-executing-the-single-click-callback-in-my-matlab-g#answer_172879

I am disappointed that GUI's do not (apparently) support the double-click option in SelectionType. Why is there no disclaimer in the help files about this?

When will this bug be fixed?