/*

 * Copyright (c) 2010 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:  CalenDayHourScrollArea implementation.

 *

 */

// System includes

#include <QGraphicsLinearLayout>

// User includes

#include "calendayhourscrollarea.h"

#include "calendayhourelement.h"

#include "calendayutils.h"

/*!

 \class CalenDayHourScrollArea

 \brief Scrollable container class for hour elements.

 It handles vertical scrolling.

 */

/*!

 \brief Constructor

 Configures scroll area settings and resets internal stares of widget.

 Gets the width of device.

 \param parent The parent of scroll area widget

 */

CalenDayHourScrollArea::CalenDayHourScrollArea(QGraphicsItem *parent) :

    HbScrollArea(parent),

    mDateTime(QDateTime())

{

    // Set scroll settings

    setScrollDirections(Qt::Vertical);

    setScrollingStyle(HbScrollArea::PanWithFollowOn);

    setVerticalScrollBarPolicy(HbScrollArea::ScrollBarAlwaysOff);

    grabGesture(Qt::PanGesture, Qt::ReceivePartialGestures);

    // Get height and width of hour elements and set fixed size policy

    qreal hourElementHeight = CalenDayUtils::instance()->hourElementHeight();

    qreal hourElementWidth = CalenDayUtils::instance()->hourElementWidth();

    // Create widget for hour elements

    HbWidget *hourWidget = new HbWidget();

    // Create and insert hour elements into vertical layout

    QGraphicsLinearLayout* hourLayout = new QGraphicsLinearLayout(Qt::Vertical,

        NULL);

    for (int i = 0; i < 24; i++) {

        CalenDayHourElement* element = new CalenDayHourElement(QTime(i, 0),

            this);

        element->setPreferredWidth(hourElementWidth);

        element->setPreferredHeight(hourElementHeight);

        element->setSizePolicy(QSizePolicy(QSizePolicy::Fixed, 

            QSizePolicy::Fixed));

        hourLayout->addItem(element);

        mHourElements.append(element);

    }

    hourLayout->setContentsMargins(0.0, 0.0, 0.0, 0.0);

    hourLayout->setSpacing(0.0);

    // Fix the size of scroll area

    setMinimumWidth(hourElementWidth);

    setMaximumWidth(hourElementWidth);

    // Apply hour layout for new widget and set content widget to scroll area

    hourWidget->setLayout(hourLayout);

    setContentWidget(hourWidget);

}

/*!

 \brief Destructor

 */

CalenDayHourScrollArea::~CalenDayHourScrollArea()

{

}

/*!

 \brief SLOT scrolls the view vertically to new position.

 \param newPosition New position

 */

void CalenDayHourScrollArea::scrollVertically(const QPointF &newPosition)

{

    QPointF currentPos = contentWidget()->pos();

    if (abs(newPosition.y()) != abs(currentPos.y())) {

        currentPos.setY(newPosition.y());

        scrollContentsTo(currentPos, 0);

    }

}

/*!

 \brief Sets date and time for this container.  

 \param dateTime new date and time

 */

void CalenDayHourScrollArea::setDateTime(const QDateTime &dateTime)

{

    mDateTime = dateTime;

}

/*!

 \brief Returns date and time assigned to current view.

*/

QDateTime CalenDayHourScrollArea::dateTime() const

{

    return mDateTime;

}

/*!

 \brief Scroll view to given hour.

  \param  An hour In 24 hour format (0 - 23)

*/

void CalenDayHourScrollArea::scrollToHour(int hour)

{

    CalenDayHourElement *hourElement = mHourElements.at(hour); 

    QRectF hourElementRect = hourElement->rect();

    hourElementRect = hourElement->mapRectToParent(hourElementRect);

    QPointF newPos = hourElementRect.topLeft();

    //Ensure that we won't scroll out of bound

    CalenDayHourElement *lastElement = mHourElements.last();

    qreal bottomEdge = lastElement->mapRectToParent(lastElement->rect()).bottom();

    qreal viewHeight = rect().height();

    if(bottomEdge - newPos.y() < viewHeight){

        newPos.setY(bottomEdge - viewHeight);

    }

    scrollContentsTo(newPos);

}

// End of File