Em Quinta-feira 23 Setembro 2010, às 13:24:19, Tomas Junnonen escreveu: > On 09/22/2010 06:31 AM, ext Zhao, Halley wrote: > > Thanks Tomas. > > Is there any examples to have multi-windows for MeeGo touch application? > > I think video playback on HDMI is done by moving windows inside virtual > > screen; just move it to a region of virtual screen which map to HDMI > > output, right? Does mcompositor aware virtual screen now? > > A multi-window app is simply created by instantiating several windows > (MApplicationWindow w1; w1.show(); MApplicationWindow w2; w2.show()). > > The app is however not able to determine the placement of the windows > relative to each other, that is up to the window manager. A device with > multiple outputs is also not likely map these into a single virtual > screen, the management of the windows would be complicated. Instead I > would expect the two outputs to be represented as different screens in > X. An app can be started on a specific screen with something like > "DISPLAY=:2 MyApp". Unfortunately, while for instance Gtk+ allows to > specify the X screen when creating a window in an app, Qt apparently > does not.
DISPLAY=:2 isn't a separate screen, it's a separate display. A separate screen
would be DISPLAY=:0.1 and that really depends on how the window manager does
it (Xinerama or not).
To specify which screen you want a widget to show in Qt, you simply pass the
screen as the parent:
QWidget *screen1 = QApplication::desktop()->screen(1);
QMainWindow myWIndow(screen1);
myWindow.show();
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