tree b9d69d1d746eaac4c049dc92974b94ece2854912
parent 1dd8b6850f4caf6a689de54a9065a448fc455e46
author Eric Williams <ericwill@redhat.com> 1551472782 -0500
committer Eric Williams <ericwill@redhat.com> 1552335505 -0400

Bug 540674: [GTK4] Adapt to new drawing model changes

This patch furthers the work on the drawing model changes in GTK4.

1) Remove instances of GdkEventExpose as this has been gone in GTK3
already.

2) Replace GDK drawing API with purely Cairo sourced drawing contexts
provided by draw/snapshot handlers or other such callbacks. This include
methods like Canvas.scroll().

3) Fixes the snapshot handling in SWT-GTK4 and propagates all snapshots
down the hierarchy to ensure things like Canvases drawing properly.

Change-Id: If96d1e0d33c97aeb5eed7bb6e5f478ee1785f30a
Signed-off-by: Eric Williams <ericwill@redhat.com>