/*

* Copyright (c) 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:

*     The header file of filemanager view manager

*

*/

#ifndef FMVIEWMANAGER_H

#define FMVIEWMANAGER_H

#include <QObject>

#include <QList>

#include "fmcommon.h"

#include <QPixmap>

class FmMainWindow;

class HbView;

class FmViewManager;

class FmOperationService;

class FmOperationBase;

class QFileSystemWatcher;

class FmDriveWatcher;

class FmDialog;

/*

 * this class is used to record relationship between dialog and drive name 

 * FmViewManager will auto-close dialog which related drive is not available again.

 * for example. set name to MMC will pop a dialog, if add the dialog to FmViewManager::addDlgCloseUnit 

 * then after eject MMC, the dialog will be auto-closed by FmViewManager::checkDlgCloseUnit()

 */

class FmDlgCloseUnit

{

public:

	FmDlgCloseUnit( FmDialog *dialog );

	~FmDlgCloseUnit();

	void addAssociatedDrives( QString drives );

	void removeAssociatedDrives( QString drives );

	QString associatedDrives();

	FmDialog *dialog();

private:

	FmDialog *mDialog;

	QString mAssociatedDrives;

};

class FmViewManager : public QObject

{

    Q_OBJECT

public:

    int viewCount();

    static FmViewManager *CreateViewManager( FmMainWindow* mainWindow );

    static void RemoveViewManager();

    static FmViewManager *viewManager();

    FmOperationService *operationService();

    Qt::Orientation orientation(); 

    void createFileView( const QString &path,

        bool enableBackPathCheck = true, bool disableFind = false );

    void createFindView( const QString &keyword, const QString &path );

    void createDriverView();

    void createSplitView();

	void createBackupView();

	void createRestoreView();

    void createDeleteBackupView();

    void saveActivity();    

	// add a close unit. this is used to auto-close dialog which related drive is not available again.

	void addDlgCloseUnit( FmDlgCloseUnit* unit )

	{

		FM_LOG( "FmViewManager::addDlgCloseUnit_" + unit->associatedDrives() );

		mDlgCloseUnitList.append( unit );

	}

	// remove a close unit.

	void removeDlgCloseUnit( FmDlgCloseUnit* unit )

	{

		FM_LOG( "FmViewManager::removeDlgCloseUnit_" + unit->associatedDrives() );

		mDlgCloseUnitList.removeOne( unit );

	}

protected:

    explicit FmViewManager( FmMainWindow* mainWindow );

    ~FmViewManager();

public slots:

   /// popViewAndShow will delete current view and pop view from stack, then show it.

    void popViewAndShow();

    // triggered when drive space is changed

    // this slots is used to watch filemanager internal events

    // drive space event from other applictaion will not be observed here

    void on_operationService_driveSpaceChanged( FmOperationBase* operationBase );

    // triggered when drive is ejected/inserted, or other drive event. it will impact available property

    void on_driveWatcher_driveAddedOrChanged();

    // if operation finished, some addition works( such as refresh... ) should be done in some views

    // so this is the central controller function

    void on_operationService_notifyFinish( FmOperationBase *operationBase );

    void onAboutToChangeView(HbView * oldView, HbView *newView);

signals:

    // emit when drive space is changed by some operation inside filemanager.

    void driveSpaceChanged();

    // emit when drive is ejected/inserted, this is watched by FmDriveWatcher

    void driveChanged();

    // when backup is created, backup date should be updated.

    void refreshBackupDate();

private:

    // when drive is ejected, this function will be called and exam dialogs in mDlgCloseUnitList

    // it will colse dialogs if related drive is not available

	void checkDlgCloseUnit();

private:

     static FmViewManager *mViewManager;

private:

    // main window

    FmMainWindow        *mMainWindow;

    // operation service, used to start operations such as copy, move, delete, format...

    FmOperationService  *mOperationService;

    // used to watch drive event, for example, eject/insert drive

    FmDriveWatcher      *mDriveWatcher;

    // used to record some dialogs that related to drive

    // the dialog should be closed in checkDlgCloseUnit if drive is not available 

	QList<FmDlgCloseUnit*> mDlgCloseUnitList;

	QPixmap mScreenShot;

};

#endif