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[Will Cooke <676457@xxxxxxxxxxxxxxxxxx>]

** Tags added: u7-trello-import

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https://bugs.launchpad.net/bugs/676457

Title:
  Launcher - Add 'launching' state to launcher icons

Status in Ayatana Design:
  Fix Committed
Status in BAMF:
  Triaged
Status in The Charlotte project:
  Fix Released
Status in Unity:
  Triaged
Status in unity design (obsolete project):
  Triaged
Status in bamf package in Ubuntu:
  Triaged
Status in unity package in Ubuntu:
  Triaged

Bug description:
  Add 'launching' state to launcher icons

  Description:

  1.  As soon as a user clicks on a app in the Dash Application Lens,
  the Launcher should use the 'startup notification protocol' to
  *instantly* place a  icon for the application in the launcher (in the
  'launching' state).  As soon as the app has finished launching, the
  Launcher icon should switch to the 'running' state.

  2.  As soon as a user clicks on a app in the Launcher that is not
  running, the Launcher icon should instantaneously switch to the
  'launching' state.  As soon as the app has finished launching, the
  Launcher icon should instantly switch to the 'running' state.

  The following art assets will be attached to this bug:

  1. Add 'launching' placeholder Launcher icon to handle the case where
  we know an app has launched but we don't have it's icon.  *important*
  - this icon should only be used when we know an app has been launched
  but we don't know its icon.  If we can get the application's icon
  quickly we should use this correct icon instead.

  https://chinstrap.canonical.com/~sabdfl/11_04/desktop_and_netbook/launcher/unity_desktop_26_01_11_stages_fixed_10.png
  (note the outer glow shown in this same design is not the correct
  cursor select state, for the correct cursor select state see
  https://chinstrap.canonical.com/~sabdfl/11_04/desktop_and_netbook/launcher/select/
  )

  Notes:

   - we flash the backlight of the icon during launch

   - as soon as we have startup notification, we create an item in the
  launcher, in grayscale, and start flashing its backlight

   - as soon as we know the desktop file and hence icon, we transition to
  the icon backlight from grayscale to an appropriate colouring based on the icon

  Finally we need a instant "flash" on click.  See bug #893140 for a
  full description of this instant feedback issue.

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