Fix for zoom-to-fit crash in public repo

[Maurice van der Pot-2]

Hi guys,

I've implemented a fix for the zoom-to-fit crash.

The problem was that I called gnome_canvas_get_scroll_offsets in the
gantt_chart_reflow_idle function and that it did not always return
up-to-date values. The old and large values caused an overflow and
eventually a crash.

The reason for calling get_scroll_offsets was to have the same scrolling
behaviour when dragging the duration of a task while left of the project
end as when right of the project end. The simple implementation (without
get_scroll_offsets) would have the gantt scroll to the left in the
latter case as soon as the cursor moves away from the right edge instead
of staying stationary until the cursor reaches the left edge.

This fix uses a dummy object on the gantt to prevent the scrollable area
from shrinking as a task duration is decreased. The dummy object is only
present while dragging.


Like Kurt said it's probably easier to have changes in a public repo, so
I put up my public planner repo at:
http://www.kfk4ever.com/~griffon26/planner.git

Or via gitweb:
http://www.kfk4ever.com/gitweb.cgi?p=planner.git;a=summary

You'll find the fix in there.

I'll push this in a few days if nobody objects.

Regards,
Maurice.

--
Maurice van der Pot

Gentoo Linux Developer   griffon26@...    http://www.gentoo.org
Gnome Planner Developer  griffon26@...  http://live.gnome.org/Planner



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