/*

* 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:

*

*/

#include <QGraphicsLinearLayout>

#include "hspageindicator.h"

#include "hspageindicatoritem.h"

/*!

*/

HsPageIndicator::HsPageIndicator(qreal spacing, QGraphicsItem *parent)

  : HbWidget(parent),

    mActiveItemIndex(-1),

    mSpacing(spacing)

{

}

/*!

*/

HsPageIndicator::~HsPageIndicator()

{

    qDeleteAll(mItems);

}

/*!

*/

void HsPageIndicator::initialize(int itemCount, int activeItemIndex)

{

    qDeleteAll(mItems);

    mItems.clear();

    mActiveItemIndex = -1;

    if (itemCount < 1 || activeItemIndex < 0 ||

        itemCount <= activeItemIndex) {

        return;

    }

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

        mItems << new HsPageIndicatorItem(i == activeItemIndex);

    }

    mActiveItemIndex = activeItemIndex;

    layoutItems();

}

/*!

*/

int HsPageIndicator::itemCount() const

{

    return mItems.count();

}

/*!

*/

void HsPageIndicator::setActiveItemIndex(int activeItemIndex)

{

    if (activeItemIndex < 0 || itemCount() <= activeItemIndex) {

        return;

    }

    mActiveItemIndex = activeItemIndex;

    for (int i = 0; i < mItems.count(); ++i) {

        mItems[i]->setActive(i == activeItemIndex);

    }

}

/*!

*/

int HsPageIndicator::activeItemIndex() const

{

    return mActiveItemIndex;

}

/*!

*/

void HsPageIndicator::addItem(int activeItemIndex)

{

    if (activeItemIndex < 0 || itemCount() < activeItemIndex) {

        return;

    }

    mItems.append(new HsPageIndicatorItem);

    layoutItems();

    setActiveItemIndex(activeItemIndex);

}

/*!

*/

void HsPageIndicator::removeItem(int activeItemIndex)

{

    if (activeItemIndex < 0 || itemCount() - 1 <= activeItemIndex) {

        return;

    }

    delete mItems.last();

    mItems.removeLast();

    layoutItems();

    setActiveItemIndex(activeItemIndex);

}

/*!

*/

bool HsPageIndicator::isAnimationRunning() const

{

    return mItems.at(mActiveItemIndex)->isAnimationRunning();

}

/*!

*/

void HsPageIndicator::layoutItems()

{

    QGraphicsLinearLayout *layout = new QGraphicsLinearLayout;

    layout->setContentsMargins(0, 0, 0, 0);

    layout->setSpacing(mSpacing);

    layout->addStretch();

    foreach (HsPageIndicatorItem *item, mItems) {

        item->setPreferredSize(preferredHeight(), preferredHeight());

        layout->addItem(item);

    }

    layout->addStretch();

    setLayout(layout);

}

/*!

*/

void HsPageIndicator::setSpacing(qreal spacing)

{

    QGraphicsLinearLayout *linearLayout = static_cast<QGraphicsLinearLayout*>(layout());

    if (linearLayout) {

        linearLayout->setSpacing(spacing);

    }

}