diff options
| 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/gui | |
| 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/gui')
| -rw-r--r-- | src/gui/kernel/qguiapplication.cpp | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp index 243ef70efc..8c49b3a2b5 100644 --- a/src/gui/kernel/qguiapplication.cpp +++ b/src/gui/kernel/qguiapplication.cpp @@ -873,9 +873,14 @@ QWindowList QGuiApplication::topLevelWindows() } /*! - Returns the primary (or default) screen of the application. + Returns the primary (or default) screen of the application, or null if there is none This will be the screen where QWindows are initially shown, unless otherwise specified. + + On some platforms, it may be null when there are actually no screens connected. + It is not possible to start a new QGuiApplication while there are no screens. + Applications which were running at the time the primary screen was removed + will stop rendering graphics until one or more screens are restored. */ QScreen *QGuiApplication::primaryScreen() { |