Repeat:
Attached is a fix for ProportionalSplitterMorph.
Currently, moving a window splitter changes all relevant frame layout
offsets; fractions are not touched. But offsets are absolute values, in
pixels, and a frame with a large offset will be badly redimensionned
when the system window extent is reduced.
To see this, open a browser, and move the main horizontal splitter way
up. Then shrink the browser: the code pane will keep a largeish height
(because of its large vertical offsets), and eventually be moved above
the browser top.
To fix this, I propose in the attached changeset to keep track of the
overall splitter delta, then on #mouseUp to recompute the fractions and
reset the offsets to the typical small values they have.
I don't know if I am being clear, but it works... try it.
(the #balanceOffsets method may possibly be simplified I guess)
Stef