MATLAB: (app designer) Callback for ROIMoved event does not work

Question

Hi,

I have modified the Matlab app 'Image histogram example' with the possibility to draw an ROI and get the histogram of that part of the image. It works when I draws the ROI but when I moves the ROI I got the below error:

Warning: Error occurred while executing the listener callback

for event ROIMoved defined for class images.roi.Rectangle:

Undefined function 'allevents' for input arguments of type

'images.roi.Rectangle'.

> In images.roi.internal/ROI/stopDrag

In images.roi.internal.ROI

I have tried several alternatives from this forum but nothing works.

Below is a sceen shot from the code view with the relevant part visible.

Answer 1

Thomas,

When setting up the listener, use

addlistener(ROI, 'ROIMoved', @app.allevents)

Then, when defining allevents, use

function allevents(app, src, event)
    ...
end