** Changed in: gtk+3.0 (Ubuntu)
       Status: Triaged => Fix Released

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https://bugs.launchpad.net/bugs/1302546

Title:
  gtk drawing area - missing or incorrect expose or draw event

Status in GTK+:
  Fix Released
Status in LiVES:
  Confirmed
Status in gtk+3.0 package in Ubuntu:
  Fix Released

Bug description:
  Application is Fotoxx 14.04. A GTK notebook is used with tabs
  containing drawing areas inside scrolled windows. The program works on
  Ubuntu 13.10 and earlier (GTK 3.8) and fails on Ubuntu 14.04 beta (as
  of April 4) (GTK 3.10).

  When the notebook tab is changed the new tab's drawing area is not
  updated (Fotoxx gallery page). Some prior data is present and the rest
  is background color only. Clicking elsewhere and then clicking the
  window title bar (unfocus and refocus the app) causes the tab to
  update correctly. Removing the default "double buffered" attribute
  from the drawing area widget after it is created makes everything work
  correctly on Ubuntu 14.04. However on earlier Ubuntu releases the
  background is not updated and is filled with data from the previous
  tab.

  This seems to be a problem with missing "draw" events or events with
  incorrect update regions. I have verified that draw events are not
  sent when the tab is switched but are sent when the window acquires
  focus.

  The GTK bug tracking system seems to have related bugs but I cannot be
  sure (too much technical jargon for my knowledge of GTK internals). I
  did not file a report there because the expected knowledge of
  internals is missing. The bug may be fixed in GTK 3.12.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: libgtk-3-0 3.10.7-0ubuntu5
  ProcVersionSignature: Ubuntu 3.13.0-22.44-generic 3.13.8
  Uname: Linux 3.13.0-22-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.14-0ubuntu1
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Fri Apr  4 13:28:59 2014
  InstallationDate: Installed on 2014-03-28 (7 days ago)
  InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Beta amd64 (20140326)
  SourcePackage: gtk+3.0
  UpgradeStatus: No upgrade log present (probably fresh install)

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