ROI listener in appdesigner not working

Question

Jason 2020-6-17

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/549864-roi-listener-in-appdesigner-not-working

回答： Jason 2020-6-17

Hello. I am using AppDesigner and have an ellipse drawn onto a UIAxes component using:

    subplot(1,3,1); hold on
    h = images.roi.Ellipse(gca,'Center',[xpeak xpeak2],'Semiaxes',[1.699*fwhm/2 1.699*fwhm2/2],'Color','g','StripeColor','r','LineWidth',1);         %1/e^2 = 1.699xfwhm  
    %el=addlistener(h,'ROIMoved',@allevents);   %This doesn't work, causes an error                   
    el=event.listener(h,'ROIMoved',@allevents)

(The ellipse draws fine and I can move it and resize it)

If I've read the documentation correctly, it suggests using event.listener rather than addlistener.

So in function I have:

        function allevents(src,evt)
            evname = evt.EventName;
            switch(evname)
                case{'MovingROI'}
                    disp(['ROI moving Current Center: ' mat2str(evt.CurrentCenter)]);
                    disp(['ROI moving Current SemiAxes: ' mat2str(evt.CurrentSemiAxes)]);
                case{'ROIMoved'}
                    disp(['ROI moved Current Center: ' mat2str(evt.CurrentCenter)]);
                    disp(['ROI moved Current SemiAxes: ' mat2str(evt.CurrentSemiAxes)]);
            end
         end