camerakeyevent_symbian.cpp Example File

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 #include "camerakeyevent_symbian.h"

 #include <QtGui/QWidget>    // WId
 #include <eikon.hrh>        // EKeyCamera
 #include <coecntrl.h>       // CCoeControl (WId)
 #include <w32std.h>         // RWindowbase, RWindowGroup, RWsSession

 QSymbianCameraKeyListener::QSymbianCameraKeyListener(QWidget *widget):
     QObject(widget),
     m_widget(widget)
 {
     if (!m_widget)
         return;

     // Get view's native Symbian window
     WId windowId = 0;
     if (m_widget->internalWinId())
         windowId = m_widget->internalWinId();
     else if (m_widget->parentWidget() && m_widget->effectiveWinId())
         windowId = m_widget->effectiveWinId();
     RWindowBase *window = windowId ? static_cast<RWindowBase*>(windowId->DrawableWindow()) : 0;

     // Get hold of the window group
     TInt wGroupId = window ? window->WindowGroupId() : 0;
     if (!wGroupId)
         return;
     RWsSession &wsSession = CCoeEnv::Static()->WsSession();
     TUint wGroupHandle = wsSession.GetWindowGroupHandle(wGroupId);
     if (wGroupHandle) {
         RWindowGroup wGroup(wsSession);
         wGroup.Construct(wGroupHandle);
         if (wGroup.CaptureKey(EKeyCamera, 0, 0, 100) < 0)
             qWarning("Unable to register for camera capture key events, SwEvent capability may be missing");
     }
 }

 QSymbianCameraKeyListener::~QSymbianCameraKeyListener()
 {
 // CaptureKey request needs to be unregistered only for Symbian^3 and later
 #ifndef Q_OS_SYMBIAN1
     if (!m_widget)
         return;

     // Get view's native Symbian window
     WId windowId = 0;
     if (m_widget->internalWinId())
         windowId = m_widget->internalWinId();
     else if (m_widget->parentWidget() && m_widget->effectiveWinId())
         windowId = m_widget->effectiveWinId();
     RWindowBase *window = windowId ? static_cast<RWindowBase*>(windowId->DrawableWindow()) : 0;

     // Get hold of the window group
     TInt wGroupId = window ? window->WindowGroupId() : 0;
     if (!wGroupId)
         return;
     RWsSession &wsSession = CCoeEnv::Static()->WsSession();
     TUint wGroupHandle = wsSession.GetWindowGroupHandle(wGroupId);
     if (wGroupHandle) {
         RWindowGroup wGroup(wsSession);
         wGroup.Construct(wGroupHandle);
         wGroup.CancelCaptureKey(EKeyCamera);
     }
 #endif // Q_OS_SYMBIAN1
 }