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[Launchpad Bug Tracker <552920@xxxxxxxxxxxxxxxxxx>]

** Branch linked: lp:~azzar1/unity/lp-552920

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https://bugs.launchpad.net/bugs/552920

Title:
  Moving diagonally from narrow menu title often opens adjacent menu

Status in One Hundred Papercuts:
  Triaged
Status in Unity:
  In Progress
Status in gtk+2.0 package in Ubuntu:
  Triaged
Status in gtk+3.0 package in Ubuntu:
  Triaged
Status in unity package in Ubuntu:
  In Progress

Bug description:
  gtk 2.22, Ubuntu 10.10

  1. Click on the volume control to open the sound menu.
  2. Move the pointer diagonally to click on the maximum volume button.
  <https://launchpadlibrarian.net/42732636/Why_autoexpanding_indicators_are_a_bad_idea.png>

  What often happens: The sound menu closes, and the menu next to it opens.
  Screencast: <https://www.youtube.com/watch?v=lVUokjAlREs>
  Example in an informal usability test: <https://www.youtube.com/watch?feature=player_detailpage&v=PgGbZfR6Vec#t=13m55s>

  What should happen: The sound menu stays open.

  One solution would be to make the volume slider vertical. But this
  would not work for other menus (like the Bluetooth menu), and would
  look awkward with other items in the menu.

  Another solution would be to use a timer for closing the current menu
  and opening a new one. This is what Windows does for submenus. But it
  has the drawback of slowing down browsing, which would be worse for
  top-level menus than for submenus.

  GTK already has a more sophisticated solution for submenus, similar to Mac OS: a triangle based on the corners of the submenu and its parent item, in which there is a much longer delay for closing the submenu and changing the menu selection. <http://www.quinn.echidna.id.au/Quinn/WWW/HISubtleties/HierarchicalMenus.html>
  Discussion of the invisible triangle for submenus in GTK:
  <http://mail.gnome.org/archives/gtk-devel-list/2000-May/msg00118.html>

  However, this feature in Gtk+ has been broken since July 2013.
  <https://bugzilla.gnome.org/show_bug.cgi?id=710388> The code, once
  fixed, should be applied to menu titles as well.

  More information: <http://thomaspark.co/2011/10/making-menus-
  escapable/>

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