Octave equivalent to Matlab buttondownfcn?

[Sar gan]

Hello, 

What is the Octave equivalent to Matlabs buttondownfcn()?
I'm looking for a way to get pixel values base on a mouse button down click. 

-------------------Matlab code----------------- 

     img=magic(5); 
      subplot(3,3,[1,2,4,5,7,8]); 
      ih=imagesc(img); 
      axis image; 
      com={ 
           'cp=round' 
           '(get(gca,''currentpoint''));' 
           'r=[cp(1),cp(3)];' 
           'r=[r,img(r(2),r(1))]' 
      }; 
      set(ih,'buttondownfcn',[com{:}]);

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Thank you,


F