/*

* Copyright (c) 2007-2008 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: tuicscrollbarmodel.h

*

*/

#ifndef T_UICSCROLLBARMODEL_H

#define T_UICSCROLLBARMODEL_H

#include <e32base.h>

/**

 * TUiCScrollBarModel

 * 

 */

class TUiCScrollBarModel

    {

public:

    /**

     * Constructor

     */

    TUiCScrollBarModel();

public: // model

    /**

     * Set total height

     */

    void SetHeight( TInt aHeight );

    /**

     * Total height

     */

    TInt Height() const;

    /**

     * Set window height

     */

    void SetWindowHeight( TInt aHeight );

    /**

     * Window height

     */

    TInt WindowHeight() const;

    /**

     * Sets top position of the window

     */

    void SetWindowPosition( TInt aPosition );

    /**

     * Top position of the window

     */

    TInt WindowPosition() const;

    /**

     * Height of the thumb

     */

    TInt ThumbHeight() const;

    /**

     * Position of thumb inside the window

     */

    TInt ThumbPosition() const;

    /**

     * Returns ETrue if total height is greater than window height

     */

    TBool ScrollBarNeeded() const;

private:

    /**

     * Returns minimum thumb height (from layout data)

     */

    TInt MinimumThumbHeight() const;

    /**

     * Returns calculated thumb height. Thumb height is calculated,

     * unless this result is smaller than MinimumThumbHeight().

     */

    TInt CalculatedThumbHeight() const;

private:

    TInt iHeight;

    TInt iWindowHeight;

    TInt iWindowPosition;

    };

#endif /* T_UICSCROLLBARMODEL_H */