Inside a window the coordinates system has its origin at the lower left
corner, and X axis is positive to the right, and Y axis is positive to
up. But inside a button I found that the origin is at upper left corner,
and that Y axis is positive to down. See attached app to test it. This
app prints at shell the coordinates where the mouse was clicked inside
the button. Is this the expected behaviour? 

Attachment: Boton-0.1.tar.gz
Description: application/compressed-tar

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