details update very very slow

This is a result of us not using fixed height mode anymore. The event processing that gtktreeview is doing is interfering with the events we use in the webkit widget. Once fixed_height mode is activated again it works fine again.

Runtime (from demo program in the bugzilla report):
normal mode: 4.75834488869
events fixed_height: 0.190175056458

Runtime with patched gtk and "ubuntu-almost-fixed-height" property set:
normal mode: 4.78250980377
events fixed_height: 0.126662015915

So no decrease (but no speedup either, the difference is just noise).

Row expand/collapse works fine with the code. Software-center is snappier and this
particular bug is fixed. But there are still some areas where we need to work to make
it faster in the code now that gtk does not hide this anymore.

Thank you

This bug was fixed in the package gtk+2.0 - 2.19.7-0ubuntu2

---------------
gtk+2.0 (2.19.7-0ubuntu2) lucid; urgency=low

  * debian/patches/063_treeview_almost_fixed.patch:
    - change by Michael Vogt to add an ubuntu-almost-fixed-height-mode property,
      the change is required for software-center, adding as an ubuntu specific
      change for now until somebody comment on the upstream bug (lp: #514879)
  * debian/patches/064_initial_fileselector_select.patch:
    - change by Cody Russell to fix the default action not working in the
      gtkfileselector until you selected a directory (lp: #80755, #181788)
 -- Sebastien Bacher <email address hidden> Mon, 22 Mar 2010 14:23:46 +0100

This bug was fixed in the package software-center - 1.1.18

---------------
software-center (1.1.18) lucid; urgency=low

  [ Michael Vogt ]
  * data/templates/AppDetailsView.html:
    - cherry pick progress nice bar improvements from
      Michael Forrest (many thanks)
  * softwarecenter/view/appdetailsview.py:
    - show correct maintenance status for non applications
      (LP: #538172)
  * softwarecenter/view/appview.py:
    - use "ubuntu-almost-fixed-height-mode" when available
      to speed up the treeview drawing significantly
      (LP: #514879)
  * softwarecenter/view/softwarepane.py:
    - set show_ratings to "false" because ratings&reviews are
      cancelt for lucid (LP: #538129)
  * softwarecenter/view/appview.py:
    - only show active pane ratings if show_ratings is true

  [ Gary Lasker ]
  * data/ui/SoftwareCenter.ui:
    - don't translate available pane notebook labels
      (LP: #539371)
  * softwarecenter/view/viewswitcher.py:
    - when collapsing a node in the left pane (e.g. "Get Software"),
      select the node (LP: 532774)
  * softwarecenter/view/appview.py:
    - tweak padding in list view buttons (LP: #537524)
  * data/templates/AppDetailsView.html,
    data/templates/CategoriesView.html:
    - set following items as not draggable; screenshot thumbnail
      in details view, "Featured Applications" icon and general
      images in categories view (LP: #530163)
 -- Michael Vogt <email address hidden> Tue, 23 Mar 2010 10:13:26 +0100