// Copyright (c) 1999-2009 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:

//

#ifndef __VWSWEVNT_H__

#define __VWSWEVNT_H__

#include <w32std.h>

//

// Forward declarations.

//

class CVwsServer;

/**

 * The CVwsWServEventHandler class actively monitors the window server for screen device change notifications.

 */ 

class CVwsWServEventHandler : public CActive

	{

public:

 	static CVwsWServEventHandler* NewL(CVwsServer& aServer, RWsSession& aWsSession, TBool aIgnoreFirstScreenDeviceChangedEvent);

	~CVwsWServEventHandler();

	void Queue();

private: // From CActive.

	void RunL();

	void DoCancel();

	TInt RunError(TInt aError);

private:

	CVwsWServEventHandler(CVwsServer& aServer, RWsSession& aWsSession, TBool aIgnoreFirstScreenDeviceChangedEvent);

	void ConstructL();

private:

	CVwsServer& iServer;

	RWsSession& iWsSession;

	TBool		iIgnoreNextScreenDeviceChangedEvent;

	};

/**

 * The CVwsWServRedrawer class handles redraw events for the window used by the view server to manage WSERV activity

 * during view transistions. The window is created in front of normal applications and is put up for the duration of

 * a view transistion. The window is transparent for ordinary view switches and opaque for screen orientation changes. 

 */ 

class CVwsWServRedrawer : public CActive

	{

public:

	static CVwsWServRedrawer* NewL(RWsSession& aWsSession, CWindowGc& aGc, RWindow& aWindow);

	~CVwsWServRedrawer();

	void SetDrawMode(TBool aOpaque);

	void Queue();

private: // From CActive

	void RunL();

	void DoCancel();

private:

	void HandleRedrawEvent(const TRect& aRect);

	void ConstructL();

	CVwsWServRedrawer(RWsSession& aWsSession, CWindowGc& aGc, RWindow& aWindow);

private:

	RWsSession& iWsSession;

	CWindowGc& iGc;

	RWindow& iWindow;

	TBool iOpaque;

	};

/**

 * The CVwsWServSessionHandler class connects to the window server and manages WSERV activity.

 * It uses an event handler to detect screen device changes for the view server and puts up a window in front of normal

 * applications to manage activity during view transistions.

 */ 

class CVwsWServSessionHandler : public CBase

	{

public:

	static CVwsWServSessionHandler* NewL(CVwsServer& aServer);

	~CVwsWServSessionHandler();

	void DisplayWindow();

	void HideWindow();

	void ConfigureScreenDevice();

	TInt GetScreenMode();

	void UpdateScreenAndDisplayWindow();

	inline RWsSession& WsSession() const;

	void SetWindowBackgroundColor(const TRgb& aBgColor);

private:

	void ConstructL();

	void CreateWServSessionL();

	CVwsWServSessionHandler(CVwsServer& aServer);

	CVwsWServEventHandler* iWServEventHandler;

	CVwsWServRedrawer* iWServRedrawer;

	CVwsServer& iServer;

	TBool iFirstDisplay;

	RWsSession iWsSession;

	CWsScreenDevice* iScreen;

	CWindowGc* iGc;

	RWindowGroup iRootWin;

	RWindow* iWindow;

	};

//

// Inlines

//

inline RWsSession& CVwsWServSessionHandler::WsSession() const

	{ return((RWsSession&)iWsSession); }

#endif