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[Launchpad Bug Tracker <1647415@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package ubuntu-ui-toolkit -
1.3.2166+17.04.20170130

---------------
ubuntu-ui-toolkit (1.3.2166+17.04.20170130) zesty; urgency=medium

  [ Andrea Bernabei ]
  * ListItemLayout documentation: fix typo in color usage of a code example.
    Fixes LP: #1561861

  [ Zsombor Egri ]
  * Get tst_listitem_focus_13 back alive. Fixes LP: #1624331.

  [ Arthur Mello ]
  * Add support for interacting with Content Hub Clipboard UI via DBus calls.
    Fixes LP: #1563440.

  [ Daniel d'Andrada ]
  * If GRID_UNIT_PX set, always use it. It should override scaling information
    from the QPA.

  [ Adnane Belmadiaf ]
  * Expose append method in TextArea. Fixes LP: #1658121.

  [ Tim Peeters ]
  * Toolbar visual refresh to scroll the icons instead of using an overflow
    panel. Fixes LP: #1558018.
  * Add missing dependency for the UITK gallery. Fixes lLP: #1640135

  [ Sergio Cazzolato ]
  * This change is done to remove the dependencies with upstart in the tests.
    To start apps with env vars is gonna be used the launch_test_application
    method provided by autopilot in its test base class which is a wrapper for
    the ubuntu-app-launch tools (API). This change removes all the dependencies
    with upstart, so all the projects which are using the initctl api and
    fixtures will be impacted. An update in the documentation or in the blog is
    gonna be done also to communicate this change to the developers.

  [ Christian Dywan ]
  * Add visualRoot property to MainWindow. Fixes LP: #1504551, LP: #1656857.
  * Add python3-debian to control.gles and harden package-sorting.sh.
  * Add organizationName property to MainWindow
  * Add MainWindow to Ubuntu.Components.Labs.
    Fixes LP: #1573118, LP: #1587431, LP: #1647415

  [ Albert Astals Cid ]
  * Labs is at 1.0.
  * You can't save the focus after the popup/dialog has been created, at that
    stage the dialog has focus already, you need to do it before creating it.

 -- Zoltán Balogh <zoltan.balogh@xxxxxxxxxxxxx>  Mon, 30 Jan 2017
11:30:03 +0000

** Changed in: ubuntu-ui-toolkit (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1647415

Title:
  units.gu() emits changed signal before completion

Status in ubuntu-ui-toolkit package in Ubuntu:
  Fix Released

Bug description:
  Consider this snippet of code:

  -----------------------------------------------
  import QtQuick 2.4
  import Ubuntu.Components 1.3

  Item {
      property int bla: units.gu(10)
      onBlaChanged: print("bla changed", bla);

      property int blubb: 80
      onBlubbChanged: print("blubb changed", blubb);

      Component.onCompleted: print("completed", bla);
  }
  ----------------------------------------------

  The output of this is:

  qml: bla changed 80
  qml: completed 80

  the changed signal should not be emitted before completion, given it
  is its initial value and not actually changed.

  The current behavior triggers all the onChanged handlers when there's
  units.gu() involved, which results in things like change animations
  being played at startup and lots of wasted cpu cycles for evaluating
  all those changed events.

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