diff -r 000000000000 -r bde4ae8d615e os/graphics/windowing/windowserver/nga/SERVER/ROOTWIN.CPP
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/os/graphics/windowing/windowserver/nga/SERVER/ROOTWIN.CPP	Fri Jun 15 03:10:57 2012 +0200
@@ -0,0 +1,288 @@
+// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).
+// All rights reserved.
+// This component and the accompanying materials are made available
+// under the terms of "Eclipse Public License v1.0"
+// which accompanies this distribution, and is available
+// at the URL "http://www.eclipse.org/legal/epl-v10.html".
+//
+// Initial Contributors:
+// Nokia Corporation - initial contribution.
+//
+// Contributors:
+//
+// Description:
+// Root window sub-class of CWsWindow
+// 
+//
+
+#include "rootwin.h"
+#include <e32std.h>
+#include <graphics/wsscreendevice.h>
+#include "server.h"
+#include "windowgroup.h"
+#include "walkwindowtree.h"
+#include "wstop.h"
+#include "ScrDev.H"
+#include "panics.h"
+#include "inifile.h"
+#include "EVENT.H"
+
+_LIT(KNoBlank,"NOBLANKSCREEN");
+_LIT(KDefaultBackgroundColor,"BACKGROUNDCOLOR");
+_LIT(KDefaultBackgroundAlpha,"BACKGROUNDALPHA");
+_LIT(KRootWinDefaultBackgroundColor,"ROOTBACKGROUNDCOLOR");
+
+CWsRootWindow::CWsRootWindow(CWsClient* aOwner, CScreen* aScreen) : CWsWindow(aOwner,WS_HANDLE_ROOT_WINDOW,aScreen)
+	{
+	iWinType=EWinTypeRoot;
+	}
+
+CWsRootWindow::~CWsRootWindow()
+	{
+	if (Screen() && (iBaseWinFlags&EBaseWinNodeCreated))
+		{
+		MWsWindowTreeObserver* const windowTreeObserver = Screen()->WindowTreeObserver();
+		if (windowTreeObserver)
+			{
+			windowTreeObserver->NodeReleased(*this);
+			iBaseWinFlags &= ~EBaseWinNodeCreated;
+			}
+		}
+	Shutdown();
+	}
+
+void CWsRootWindow::ConstructL()
+	{
+	CWsWindow::Construct();
+	iParent=NULL;
+	iSibling=NULL;
+	iChild=NULL;
+	iClientHandle=NULL;
+	iAbs.Resize(iScreen->SizeInPixels());
+	iRel=iAbs;
+	iFlags=EFlagPointerCaptured;
+	iPointerFilter=EPointerFilterEnterExit|EPointerFilterMove|EPointerFilterDrag;
+	iArea.AddRect(iAbs);
+	iRedraw=new(ELeave) CWsBlankWindow(this);
+	iRedraw->ConstructL();
+	TInt backgroundcolor;
+	if(!WsIniFile->FindVar(KDefaultBackgroundColor,backgroundcolor))
+		backgroundcolor = KRgbWhite.Value();
+	TInt backgroundalpha;
+	if(!WsIniFile->FindVar(KDefaultBackgroundAlpha,backgroundalpha))
+		backgroundalpha = 0xFF;	
+	iDefaultBackgroundColor = TRgb(backgroundcolor,backgroundalpha);
+	
+	if (WsIniFile->FindVar(KNoBlank))
+		BlankRedraw()->SetBackgroundClear();
+	else
+		{
+		if (WsIniFile->FindVar(KRootWinDefaultBackgroundColor,backgroundcolor))
+			SetColor(TRgb(backgroundcolor,backgroundalpha));
+		else
+			SetColor(iDefaultBackgroundColor);
+		}
+
+	MWsWindowTreeObserver* const windowTreeObserver = Screen()->WindowTreeObserver();
+	if (windowTreeObserver)
+		{
+		windowTreeObserver->NodeCreated(*this, NULL);
+		iBaseWinFlags |= EBaseWinNodeCreated;
+		}
+	}
+
+void CWsRootWindow::SetColor(TRgb aColor)
+	{
+	BlankRedraw()->SetColor(aColor);
+	}
+
+void CWsRootWindow::SetColorIfClear()
+	{
+	if (!BlankRedraw()->IsBackgroundColor())
+		SetColor(iDefaultBackgroundColor);
+	}
+
+const CWsWindow *CWsRootWindow::PointerWindow(const TPoint &aInPos,TPoint *aOutPos, TPoint *aParentPos,
+					const CWsWindow *aGrabWin, const CWsWindow *&aOriginalWinItIsIn, const CWsWindowGroup *aForceInGroup)
+//
+// For aInPos (a global point on screen) find which window it is in, starting the search from 'this'.
+// aOutPos is set to be aInPos adjusted relative to the top left of the result window.
+// If the pointer is not in any of the searched windows the result is returned as though it was in 'this'
+// even though it may actually be oustside the bounds of this.
+//
+// If aForceInGroup==NULL search all groups otherwise only search it only
+//
+	{
+	aOriginalWinItIsIn=this;
+	const CWsWindowGroup *group;
+	const CWsWindowGroup *winItIsInGroup=aForceInGroup;
+//
+// First determine owner of the window the event is in regardless of any capture
+// This is so we can decide whether the capture affects this case or not
+//
+	for(group=(aForceInGroup ? aForceInGroup:Child());group!=NULL;group=group->NextSibling())
+		{
+		CWsClientWindow *win=group->Child();
+		while(win!=NULL)
+			{
+			const TRegion *baseArea=win->BaseArea();
+			if (win->IsVisible() && baseArea->Contains(aInPos))
+				{
+				aOriginalWinItIsIn=win;
+				winItIsInGroup=group;
+				win=win->Child();
+				}
+			else
+				win=win->NextSibling();
+			}
+		if (aOriginalWinItIsIn!=this || aForceInGroup!=NULL)
+			break;
+		}
+//
+// Then try again taking note of any pointer capture or grab
+//
+	const CWsWindow *winItIsIn;
+	if (aGrabWin!=NULL)
+		winItIsIn=aGrabWin;
+	else
+		{
+		winItIsIn=this;
+		for(group=(aForceInGroup ? aForceInGroup:Child());group!=NULL;group=group->NextSibling())
+			{
+			CWsClientWindow *win=group->Child();
+			while(win!=NULL)
+				{
+				const TRegion *baseArea=win->BaseArea();
+				const TBool underTheSameGroup=winItIsInGroup==group;
+				if (win->IsVisible() && 
+					((win->iFlags&EFlagPointerCaptured && 
+					 ((!underTheSameGroup && win->iFlags&EFlagPointerCaptureAllGroups) || 
+					  (winItIsInGroup==NULL && group==CWsTop::FocusWindowGroup()) || 
+					  (underTheSameGroup && win->iPointerCapturePriority>=aOriginalWinItIsIn->iPointerCapturePriority)))
+					   || baseArea->Contains(aInPos)))
+					{
+				 	winItIsIn=win;
+					win=win->Child();
+					}
+				else
+					win=win->NextSibling();
+				}
+			if (winItIsIn!=this || aForceInGroup!=NULL)
+				break;
+			}
+		}
+	if (aOutPos!=NULL)
+		{
+		*aOutPos=aInPos-winItIsIn->iOrigin;
+		}
+	if (aParentPos!=NULL)
+		{
+		const CWsWindowBase *win=winItIsIn->BaseParent();
+		if (win==NULL)
+			win=winItIsIn;
+		*aParentPos=aInPos-win->Origin();
+		}
+	return(winItIsIn);
+	}
+
+void CWsRootWindow::GenerateWindowRegion(RWsRegion &aRegion) const
+	{
+	aRegion.Clear();
+	aRegion.AddRect(iAbs);
+	if (iChild)
+		{
+		for(CWsTopClientWindow *win=FirstTopClientWindow();aRegion.Count()>0 && win!=NULL;win=win->NextSiblingMultiParent())
+			{
+			if (win->IsVisible())
+				aRegion.SubRegion(*win->BaseArea());
+			}
+		}
+	}
+
+void CWsRootWindow::CommandL(TInt , const TAny *)
+	{
+	WS_PANIC_ALWAYS(EWsPanicRootCommand);
+	}
+
+void CWsRootWindow::InvalidateWholeScreen()
+	{
+	RWsRegion screen(iAbs);
+	Invalidate(&screen);
+	screen.Close();
+	}
+
+void CWsRootWindow::Invalidate(RWsRegion* aRegion)
+	{
+	iScreen->AddRedrawRegion(*aRegion);
+	}
+
+void CWsRootWindow::AdjustCoordsDueToRotation()
+	{
+	iArea.Clear();
+	iAbs=iScreen->DrawableArea();
+	iRel=iAbs;
+	iArea.AddRect(iAbs);
+	iOrigin=iAbs.iTl;
+	for(CWsTopClientWindow *win=FirstTopClientWindow();win!=NULL;win=win->NextSiblingMultiParent())
+		{
+		win->RecalcChildAbs(NULL);
+		}
+	}
+
+void CWsRootWindow::ClearDisplay()
+	{
+	MWsScreenDevice *sd=static_cast<MWsScreenDevice*>(iScreen->ResolveObjectInterface(KMWsScreenDevice));
+	WS_ASSERT_ALWAYS(sd, EWsPanicScreenDeviceMissing); 
+	sd->ClearDisplay(BackColor());	
+	}
+
+void CWsRootWindow::SetSystemFaded(TBool aFaded, TUint8 aBlackMap, TUint8 aWhiteMap)
+	{
+	WS_ASSERT_DEBUG(Screen(),EWsPanicNoScreen);
+	
+	TBool stateChanged = EFalse; //will be set to true if one or more windows change fade state.
+	for(CWsWindowGroup* win=Child();win!=NULL;win=win->NextSibling())
+		{
+		TWalkWindowTreeSetSystemFaded wwt(aFaded, win, aBlackMap, aWhiteMap, stateChanged);
+		win->WalkWindowTree(wwt,EWalkChildren);
+		}
+
+	MWsWindowTreeObserver* windowTreeObserver = Screen()->WindowTreeObserver();
+	if(windowTreeObserver && stateChanged)
+		{
+		windowTreeObserver->FadeAllChildren(*this, aFaded);
+		}
+	}
+
+CWsWindowGroup* CWsRootWindow::WindowGroup(TInt aWindowGroup)
+	{
+	CWsWindowBase* group=iChild;
+	while (aWindowGroup-->0 && group)
+		group=group->NextSibling();
+	return static_cast<CWsWindowGroup*>(group);
+	}
+
+CWsTopClientWindow *CWsRootWindow::FirstTopClientWindow() const
+	{
+	CWsWindowGroup* group;
+	for(group=Child();group && group->Child()==NULL;group=group->NextSibling())
+		{}
+	return(group?group->Child():NULL);
+	}
+
+const TRegion& CWsRootWindow::WindowArea() const
+	{
+	return iArea;
+	}
+
+void CWsRootWindow::SendState(MWsWindowTreeObserver& aWindowTreeObserver) const
+	{
+	aWindowTreeObserver.NodeCreated(*this, NULL);
+	}
+
+/** @see MWsWindowTreeNode */
+const MWsWindow* CWsRootWindow::Window() const
+	{
+	return NULL;
+	}
+