In such solution can occur another problem. The correct solution is:
bool
CameraWindow::event( QEvent * e )
{
switch( e->type() )
{
case QEvent::Resize :
case QEvent::LayoutRequest :
case QEvent::OrientationChange :
QCoreApplication::processEvents();
break;
default :
break;
}
return QWidget::event( e );
}
With this approach camera window rotates correctly and application
doesn't crash.
9/29/2015 10:25 PM, Igor Mironchik пишет:
> Problem is still actual. I refused from QCameraViewfinder. The main
> problem is that QCameraViewfinder eat resourses and on UI rotation
> widget doesn't updates its layouts and so on.
>
> In my implementation of view finder before drawing frame I invoke
> QCoreApplication::processEvents(). Without it UI doesn't update and
> after first rotation doesn't receive any more rotation events. But
> with processEvents() all is fine.
>
> Hope this information will be useful for somebody...
>
> On 29.09.2015 12:37, Igor Mironchik wrote:
>> Hi guys,
>>
>> Does anybody have experience with displaying QCameraViewfinder on iOS?
>>
>> I successfully display it, I see video from camera... But I have one
>> problem: when I rotate device my window trying to rotate and stopping
>> in the middle of this action. When I click somewhere on this screen
>> then layout correctly updates and everything looks correct but I
>> don't receive rotation anymore. If I don't display QCameraViewfinder
>> then rotation works fine.
>>
>> Does anybody have experience with this problem?
>>
>> What can I do?
>>
>> How can I handle rotation events in Qt?
>>
>> I tried to connect to QScreen::orientationChanged() and do some
>> workarounds but I don't receive this signal... I use
>> QGuiApplication::primaryScreen()...
>>
>> Thank you.
>
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