Lock screen orientation with Qt

cheng

How to lock screen orientation with Qt code? I have seen the code from native symbian c++ that run on Qt, but it is not work for me.

Code:
@
//example_application.pro

  symbian: {

      LIBS += -lcone -leikcore -lavkon

  }

//example_application.cpp

  #ifdef Q_OS_SYMBIAN

  #include <eikenv.h>

  #include <eikappui.h>

  #include <aknenv.h>

  #include <aknappui.h>

  #endif


  CAknAppUi* appUi = dynamic_cast (CEikonEnv::Static()->AppUi());

  TRAPD(error,

  if (appUi) appUi->SetOrientationL(CAknAppUi::EAppUiOrientationLandscape);

  );

@
I am using Qt Creator from NokiaQtSDK.

kkoehne

I have by chance an example project open that also does this. The only difference I can instanly spot is that it also links against the eiksrv library:

LIBS += -leiksrv

kamalakshantv

try this

@#ifdef Q_OS_SYMBIAN

CAknAppUi* appUi = dynamic_cast<CAknAppUi*>( CEikonEnv::Static()->AppUi() );
  
if(appUi) 
  {
  TRAP_IGNORE( appUi->SetOrientationL( CAknAppUi::EAppUiOrientationLandscape ) );
  }

#endif // Q_OS_SYMBIAN@

mismail

I used this code but it did not work for me.
I built my app using QML and C++.
@QApplication::setGraphicsSystem("raster");
QApplication app(argc, argv);
#ifdef Q_OS_SYMBIAN
CAknAppUi* appUi = dynamic_cast<CAknAppUi*>( CEikonEnv::Static()->AppUi() );
if(appUi)
{
appUi->SetOrientationL( CAknAppUi::EAppUiOrientationPortrait);
}
#endif // Q_OS_SYMBIAN
QmlApplicationViewer viewer;
//viewer.setOrientation(QmlApplicationViewer::ScreenOrientationLockPortrait);@

kamalakshantv

[quote author="mismael" date="1307435986"]I used this code but it did not work.[/quote]

You might have missed something. The new Qt Creator template creates sample app project with orientation lock code in it. Try with that once.

thisisbhaskar

On your main QWidget or QMainWindow or QGraphicsView call function

@setAttribute(Qt::WA_LockPortraitOrientation, true);@

This works in all the platforms.

thisisbhaskar

For Qml, Atleast below code works well for me

@QmlApplicationViewer viewer;
viewer.setOrientation(QmlApplicationViewer::ScreenOrientationLockPortrait);
viewer.setResizeMode(QDeclarativeView::SizeRootObjectToView);
viewer.showFullScreen();@

This locks my screen orientation of portrait.

Chuck Gao

In my memory, if you create a qml project(for mobile) in the Qt Creator, it will generate these code to you :)

some snap code:

@void MainWindow::setOrientation(ScreenOrientation orientation)
{
#ifdef Q_OS_SYMBIAN
if (orientation != ScreenOrientationAuto) {
#if defined(ORIENTATIONLOCK)
const CAknAppUiBase::TAppUiOrientation uiOrientation =
(orientation == ScreenOrientationLockPortrait) ? CAknAppUi::EAppUiOrientationPortrait
: CAknAppUi::EAppUiOrientationLandscape;
CAknAppUi* appUi = dynamic_cast<CAknAppUi*> (CEikonEnv::Static()->AppUi());
TRAPD(error,
if (appUi)
appUi->SetOrientationL(uiOrientation);
);
Q_UNUSED(error)
#else // ORIENTATIONLOCK
qWarning("'ORIENTATIONLOCK' needs to be defined on Symbian when locking the orientation.");
#endif // ORIENTATIONLOCK
}
#elif defined(Q_WS_MAEMO_5)
Qt::WidgetAttribute attribute;
switch (orientation) {
case ScreenOrientationLockPortrait:
attribute = Qt::WA_Maemo5PortraitOrientation;
break;
case ScreenOrientationLockLandscape:
attribute = Qt::WA_Maemo5LandscapeOrientation;
break;
case ScreenOrientationAuto:
default:
attribute = Qt::WA_Maemo5AutoOrientation;
break;
}
setAttribute(attribute, true);
#else // Q_OS_SYMBIAN
Q_UNUSED(orientation);
#endif // Q_OS_SYMBIAN
}

void MainWindow::showExpanded()
{
#ifdef Q_OS_SYMBIAN
showFullScreen();
#elif defined(Q_WS_MAEMO_5) || defined(Q_WS_MAEMO_6)
showMaximized();
#else
show();
#endif
}@