Hey,
2014-07-17 23:05 GMT+02:00 Piotr Tworek <tworaz...@gmail.com>:
> Is there a way to lock application screen orientation to landscape
> directly from Qt/C++ code? I know it's possible from QML, but I can't
> find any docs how the same can be done from C++.
You can e.g. subclass QWindow to a custom class (so you can handle
events, I call that QWindow subclass instance "view" in the code
snippet below), then instantiate and show the window
(.showFullScreen()) and then tell the system that the content is in
landscape like this:
// Switch to landscape mode
view.reportContentOrientationChange(Qt::LandscapeOrientation);
view.screen()->setOrientationUpdateMask(Qt::LandscapeOrientation);
You still have a "portrait" window (in the sense that you have to
rotate your content in your code, but that's always more efficent than
having the compositor do a rotated readout of your window buffer, even
if that's done in special 2D blitting hardware that can do
multiple-of-90-degrees readouts in hardware), but you can render in
landscape (in my case, I render everything in GL ES, so rotating is
just applying some forward-rotation to the projection matrix and
backward-rotation for handling input). What this will do is:
1. It will make the volume bar appear in landscape orientation
2. It will allow closing the window from the "top" relative to
landscape orientation (right screen border on device)
3. Everything else that a landscape window will do that I forgot here
HTH :)
Thomas
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