Hello, 

We are testing Clutter and GTKClutterEmbed for maybe a rather unusual, but for
us very logical use. We are building a 2D Medical Image Viewer, like MRICRO and
ImageJ, for research purposes. Our first main objective is to have a tool
specialized in ROI drawing, because we don't find any tool we find usable.

We are experimenting with OpenGL and we think Clutter is very suitable for our
2D needs. A single stage works perfectly to scroll,zoom and pan through a stack
of slices.

Now we are experimenting with MPR (Multi Planar Reformatted) Images, 3 views,
Axial, Coronal, Sagittal views of the same stack. So we need 3 stages, because
sometimes a very large zoom has to be separate and none overlapping between the
3 views right next to each other. So we started to use GTKClutterEmbed. But this
is giving me big problems.

Moving with the mouse from one to the other, events start to generate lots of
errors like the one below, I connected some leave and enter events, and the
pointers they return are not always the pointers of the stage the pointer is in.
If I go from one embedded clutter stage to the other by moving first out of the
window before entering the other embedded clutter widget, everything is working
fine.

Is this a bug or could it be my coding? 

Regards

Marc Geerlings

  (clMedView:16773): Clutter-WARNING **: The required ID of 2236962 does not
refer to an existing actor; this usually implies that the pick() of an actor is
not correctly implemented or that there is an error in the glReadPixels()
implementation of the GL driver.

(clMedView:16773): Clutter-WARNING **: The required ID of 6645093 does not refer
to an existing actor; this usually implies that the pick() of an actor is not
correctly implemented or that there is an error in the glReadPixels() implementa

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