This bug was fixed in the package qtubuntu -
0.62+16.04.20151105-0ubuntu1
---------------
qtubuntu (0.62+16.04.20151105-0ubuntu1) xenial; urgency=medium
[ Nick Dedekind ]
* Support server->client visibility change to stop rendering
(lp:#1475678) (LP: #1475678)
[ Olivier Tilloy ]
* Re-implement QPlatformScreen::physicalSize(). (LP: #1504293)
-- Michał Sawicz <michal.saw...@canonical.com> Thu, 05 Nov 2015
16:56:48 +0000
** Changed in: qtubuntu (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1504293
Title:
Screen.pixelDensity is incorrect on all devices
Status in Canonical System Image:
Fix Committed
Status in qtubuntu:
Fix Released
Status in qtubuntu package in Ubuntu:
Fix Released
Bug description:
I’m testing the Screen.pixelDensity attached property
(http://doc.qt.io/qt-5/qml-qtquick-window-screen.html#pixelDensity-
attached-prop) in a QML app on various devices (krillin, arale, flo),
and the screen always reports the same incorrect value: 3.93701 px/mm.
I had a quick look at how this is implemented in QtQuick, and it calls
into QScreen::physicalDotsPerInch(), which itself calls into
QPlatformScreen::physicalSize(), which doesn’t appear to be
reimplemented in QtUbuntu (UbuntuScreen).
For reference, I want to use that property to calculate the physical
size of the screen, as a heuristic to determine the most suitable form
factor.
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