// screenmngr.cpp

// 

// Copyright (c) 2009 - 2010 Accenture. All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the "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:

// Accenture - Initial contribution

//

#include <e32base.h>

#include "screenmngr.h"

#include "viewbase.h"

const TInt KCmdWndMinHeight = 3;

const TInt KCmdWndMinWidth = 20;

const TInt KRM = 1000; //const multiplication to avoid inexact calculations on small numbers

void CScreenManager::ResizeScreenL(const TWindow& aWindow)

	{

	if(aWindow.iHeight < KCmdWndMinHeight

		|| aWindow.iWidth < KCmdWndMinWidth)

		User::Leave(KErrNotSupported);

	if(aWindow == iScreenWnd)

		return;

	//We need to leave one char on each side for the border around the console window, so the width/height is actually less by 2

	iMainWnd.iX = iCmdWnd.iX = aWindow.iX;

	iMainWnd.iWidth = iCmdWnd.iWidth = aWindow.iWidth + KConsoleWidthCorrection;

	iMainWnd.iY = aWindow.iY;

	//Based on proportions of windows on the old screen calculate proportions on the new screen

	TInt newcmdh = 1;

	if(iScreenWnd.iHeight)

		{

		newcmdh = ((iCmdWnd.iHeight*KRM) * (aWindow.iHeight*KRM)) / iScreenWnd.iHeight*KRM*KRM;

		if(newcmdh >= aWindow.iHeight)

			newcmdh = aWindow.iHeight/2;

		}

	iCmdWnd.iHeight = newcmdh > 0 ? newcmdh : 1;

	iMainWnd.iHeight = aWindow.iHeight - iCmdWnd.iHeight + KConsoleWidthCorrection;

	iCmdWnd.iY = aWindow.iY + iMainWnd.iHeight;

	iScreenWnd = aWindow;

	if(iCurrentView)

		iCurrentView->ResizeL(iMainWnd);

	}

const TWindow& CScreenManager::ResizeCommandWindowL(TInt aHeight)

	{

	if(aHeight == iCmdWnd.iHeight)

		return iCmdWnd;

	//resize the main and cmd windows

	if(aHeight > iScreenWnd.iHeight)

		aHeight = iScreenWnd.iHeight;

	iCmdWnd.iHeight = aHeight;

	iMainWnd.iHeight = iScreenWnd.iHeight - iCmdWnd.iHeight;

	iCmdWnd.iY = iScreenWnd.iY + iMainWnd.iHeight;

	if(iCurrentView)

		iCurrentView->ResizeL(iMainWnd);

	return iCmdWnd;

	}

void CScreenManager::AddViewL(MViewController& aView)

	{

	//Here create a new window if necessary

	AttachViewL(aView);

	}

void CScreenManager::AttachViewL(MViewController& aView)

	{

	if(iCurrentView)

		{

		iCurrentView->DeactivateL();

		}

	iCurrentView = &aView;

	iCurrentView->RedrawL(iMainWnd);

	}

void CScreenManager::UnsetCurrentView()

	{

	iCurrentView = NULL;

	}

void CScreenManager::RefreshScreenL()

	{

	if (iCurrentView) iCurrentView->RedrawL(iMainWnd);

	}