tvout/tvoutengine/src/glxwindowvisibilitymonitor.cpp
author hgs
Fri, 23 Jul 2010 20:41:04 +0530
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permissions -rw-r--r--
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/*
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* Copyright (c) 2008-2009 Nokia Corporation and/or its subsidiary(-ies). 
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:    Class that monitors tv window visibility
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*
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*/
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//  CLASS HEADER
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#include "glxwindowvisibilitymonitor.h"
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//  EXTERNAL INCLUDES
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#include <w32std.h>             // for TWsEvent
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#include <AknDef.h>             // for KAknFullOrPartialForegroundLost
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#include <AknWsEventObserver.h> // for EventMonitor
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#include <aknappui.h>
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//  INTERNAL INCLUDES
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#include <glxlog.h>
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#include <glxpanic.h>
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#include "glxtv.h"              // for MGlxWindowVisibilityObserver
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//-----------------------------------------------------------------------------
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// Return new object
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//-----------------------------------------------------------------------------
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//
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CGlxWindowVisibilityMonitor* CGlxWindowVisibilityMonitor::NewL(
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                               MGlxWindowVisibilityObserver& aVisibilityObserver ) 
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    {
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    GLX_LOG_INFO("CGlxWindowVisibilityMonitor::NewL");
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    CGlxWindowVisibilityMonitor* self = new ( ELeave ) 
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                CGlxWindowVisibilityMonitor( aVisibilityObserver );
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    CleanupStack::PushL( self );
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    self->ConstructL();
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    CleanupStack::Pop( self );
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    return self;
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    }
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//-----------------------------------------------------------------------------
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// Destructor
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//-----------------------------------------------------------------------------
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//
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CGlxWindowVisibilityMonitor::~CGlxWindowVisibilityMonitor()
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    {
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    GLX_LOG_INFO("~CGlxWindowVisibilityMonitor");
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    }
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//-----------------------------------------------------------------------------
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// Close
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// To overcome code-scanner high rated warning
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//-----------------------------------------------------------------------------
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//
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void CGlxWindowVisibilityMonitor::Close()
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    {
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    iAknEventMonitor->Enable( EFalse );
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    iAknEventMonitor->RemoveObserver( this );
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    }
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//-----------------------------------------------------------------------------
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// Default C++ constructor
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//-----------------------------------------------------------------------------
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//
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CGlxWindowVisibilityMonitor::CGlxWindowVisibilityMonitor
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                           ( MGlxWindowVisibilityObserver& aVisibilityObserver ) 
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                            :iVisibilityObserver ( aVisibilityObserver )
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    {
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    GLX_LOG_INFO("CGlxWindowVisibilityMonitor");
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    }
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//-----------------------------------------------------------------------------
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// Symbian second phase constructor
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//-----------------------------------------------------------------------------
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//
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void CGlxWindowVisibilityMonitor::ConstructL()
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    {
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    GLX_LOG_INFO("CGlxWindowVisibilityMonitor::ConstructL");
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    // Register for visibility events
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    iAknEventMonitor = 
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       static_cast<CAknAppUiBase*>(CCoeEnv::Static()->AppUi())->EventMonitor();
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    iAknEventMonitor->Enable( ETrue );
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    iAknEventMonitor->AddObserverL( this );
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    }
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//-----------------------------------------------------------------------------
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// From class MAknWsEventObserver
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// Propagates window server visibility events to the observer
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//-----------------------------------------------------------------------------
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//
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void CGlxWindowVisibilityMonitor::HandleWsEventL( const TWsEvent& aEvent, 
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                                                CCoeControl* /*aDestination*/ )
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    {
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    GLX_LOG_INFO("CGlxWindowVisibilityMonitor::HandleWsEventL");
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	TInt eventType = aEvent.Type();
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    if ( eventType == EEventWindowVisibilityChanged )
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        {
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        // check the state 
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        TUint visible = aEvent.VisibilityChanged()->iFlags;
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        // notify the observer
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        if ( visible & TWsVisibilityChangedEvent::EFullyVisible )
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            {
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            GLX_LOG_INFO("Visibility Event - EFullyVisible");
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            iVisibilityObserver.HandleWindowVisibilityChangedL( ETvDisplayIsVisible ); 
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            }
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        else if ( visible & TWsVisibilityChangedEvent::ENotVisible )
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            {
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            GLX_LOG_INFO("Visibility Event - ENotVisible");
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            iVisibilityObserver.HandleWindowVisibilityChangedL( ETvDisplayNotVisible ); 
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            }
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         else if (visible & TWsVisibilityChangedEvent::EPartiallyVisible)   
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            {
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            GLX_LOG_INFO("Visibility Event - EPartiallyVisible");
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            iVisibilityObserver.HandleWindowVisibilityChangedL( ETvDisplayNotVisible ); 
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            }
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        }
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    }
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