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| author | Shawn Rutledge <shawn.rutledge@digia.com> | 2015-03-02 10:48:21 +0100 |
|---|---|---|
| committer | Shawn Rutledge <shawn.rutledge@digia.com> | 2015-03-06 19:54:46 +0000 |
| commit | 51ada7734ad780178ecced11e0dff454dfc2e5f2 (patch) | |
| tree | 4a56f0635c100f5053fd9ddf36b0e2cb5150dcea /src/widgets | |
| parent | d7401c32c5eb514da639753d939fafabd9d3492f (diff) | |
xcb: do not create a dummy QScreen when there are no outputs
Whenever a QWindow is associated with a QScreen, the screen is expected
to be a real working one, so that rendering continues to be possible.
This partially reverts 52f5e50f11a3ba82e32dc2efc656e4021a3fa4f5
[ChangeLog][QPA][Xcb] If all QScreens (xcb outputs) are disconnected
while an application is running, QGuiApplication::primaryScreen() will
return null until a screen is connected again.
Task-number: QTBUG-40174
Task-number: QTBUG-42985
Change-Id: Id1b29dd70eaf3f2e7fd477516ce7e2bf24e095f6
Reviewed-by: Laszlo Agocs <laszlo.agocs@theqtcompany.com>
Reviewed-by: Jørgen Lind <jorgen.lind@theqtcompany.com>
Diffstat (limited to 'src/widgets')
| -rw-r--r-- | src/widgets/kernel/qdesktopwidget.qdoc | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/widgets/kernel/qdesktopwidget.qdoc b/src/widgets/kernel/qdesktopwidget.qdoc index 822bb47a15..6ce312dc2f 100644 --- a/src/widgets/kernel/qdesktopwidget.qdoc +++ b/src/widgets/kernel/qdesktopwidget.qdoc @@ -238,6 +238,11 @@ \property QDesktopWidget::screenCount \brief the number of screens currently available on the system. + Note that on some platforms, screenCount will be zero if there are actually + no screens connected. Applications which were running at the time the + screenCount went to zero will stop rendering graphics until one or more + screens are restored. + \since 4.6 */ |