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| author | Laszlo Agocs <laszlo.agocs@theqtcompany.com> | 2015-05-07 18:05:00 +0200 |
|---|---|---|
| committer | Laszlo Agocs <laszlo.agocs@theqtcompany.com> | 2015-05-12 08:58:52 +0000 |
| commit | d33edcfe379fe4d86c8a4a0a2b02e8c6af104a71 (patch) | |
| tree | 2b70fb748e082b0aca98593ddd657daacc73d8d3 /tests/manual/qscreen/README | |
| parent | 1adedb7baad717bd6f41796ccc717ba93e2f3738 (diff) | |
Fix the qscreen manual test for separate X screens
It is fully possible to show a window on all the connected screens
even when the screens are not virtual siblings, i.e. they do not
form one big desktop. When X is configured to use a separate screen
for each physical screen, it becomes essential to do setScreen()
either directly or via QDesktopWidget in case of widgets. The original
code attempting to call QWindow::setScreen() cannot succeed since there
is no QWindow available before the widget is shown. This is easy to
work around.
The app now works identically in all cases.
Change-Id: I519ca0c0109c68aac2f2d4e6972d14b55767b403
Reviewed-by: Gunnar Sletta <gunnar@sletta.org>
Diffstat (limited to 'tests/manual/qscreen/README')
| -rw-r--r-- | tests/manual/qscreen/README | 12 |
1 files changed, 4 insertions, 8 deletions
diff --git a/tests/manual/qscreen/README b/tests/manual/qscreen/README index 5f5da17293..cd1324276d 100644 --- a/tests/manual/qscreen/README +++ b/tests/manual/qscreen/README @@ -20,14 +20,10 @@ create two windows, and will center one each screen, by setting the geometry. Alternatively you can configure xorg.conf to create separate screens for each graphics card; then the mouse cursor can move between the screens, but -application windows cannot: each app needs to be started up on the screen that -you want to run it on. In either case, ideally this test app ought to create -two windows, one on each screen; but in fact, it can do that only if the -screens are virtual siblings. If they are on different Displays, the second -Display is not accessible to the QXcbConnection instance which was createad on -the first Display. It can be considered a known bug that the API appears to -make this possible (you would think QWindow::setScreen might work) but it -isn't possible. +application windows cannot: each app needs to be started on the screen that +you want to run it on (by specifying e.g. DISPLAY=:0.1 for the second screen), +or the application has to set the desired screen via QWindow::setScreen() before +showing the window. The physical size of the screen is considered to be a constant. This can create discrepancies in DPI when orientation is changed, or when the screen is |