/****************************************************************************+
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**+
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).+
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** All rights reserved.+
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** Contact: Nokia Corporation (developer.feedback@nokia.com)+
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**+
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** This file is part of the HbWidgets module of the UI Extensions for Mobile.+
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**+
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** GNU Lesser General Public License Usage+
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** This file may be used under the terms of the GNU Lesser General Public+
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** License version 2.1 as published by the Free Software Foundation and+
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** appearing in the file LICENSE.LGPL included in the packaging of this file.+
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** Please review the following information to ensure the GNU Lesser General+
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** Public License version 2.1 requirements will be met:+
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** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.+
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**+
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** In addition, as a special exception, Nokia gives you certain additional+
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** rights.  These rights are described in the Nokia Qt LGPL Exception+
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.+
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**+
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** If you have questions regarding the use of this file, please contact+
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** Nokia at developer.feedback@nokia.com.+
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**+
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****************************************************************************/+
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    +
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#include "hbtreeview_p.h"+
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#include "hbtreeview.h"+
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+
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#include "hbabstractitemcontainer_p.h"+
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+
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const QString KDefaultLayoutOption = "default";+
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+
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HbTreeViewPrivate::HbTreeViewPrivate() :+
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    HbAbstractItemViewPrivate(),+
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    mSelectionStarted(false),+
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    mInSetExpanded(false)+
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{+
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}+
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+
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HbTreeViewPrivate::~HbTreeViewPrivate()+
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{+
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}+
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+
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void HbTreeViewPrivate::init()+
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{+
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    Q_Q(HbTreeView);+
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    q->setItemRecycling(true);+
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    q->setScrollDirections(Qt::Horizontal | Qt::Vertical);+
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    mLayoutOptionName = KDefaultLayoutOption;+
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    treeModelIterator()->setItemContainer(mContainer);+
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}+
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+
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bool HbTreeViewPrivate::isParentValid(const QModelIndex &parent) const+
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{+
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    bool valid = false;+
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    QModelIndex currentParent = parent;+
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    while (!valid) {+
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        if (currentParent == mModelIterator->rootIndex()) {+
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            valid = true;+
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        } else if (currentParent.isValid()) {+
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            currentParent = currentParent.parent();+
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        } else {+
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            break;+
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        }+
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    }+
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    return valid;+
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}+
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+
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bool HbTreeViewPrivate::isChild(const QModelIndex &index, const QModelIndex &parent) const+
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{+
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    bool isChild = false;+
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    QModelIndex currentIndex = index;+
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    while (!isChild) {+
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        if (currentIndex.parent() == parent) {+
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            isChild = true;+
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        } else if (currentIndex.isValid()) {+
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            currentIndex = currentIndex.parent();+
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        } else {+
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            break;+
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        }+
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    }+
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    return isChild;+
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}+
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+
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QModelIndex HbTreeViewPrivate::searchIndexUp( +
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                            const   QModelIndex &index,+
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                            int     maxStepCount) const+
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{+
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    Q_Q(const HbTreeView);+
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+
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    QModelIndex root = q->rootIndex();+
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    int counter = 1;+
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+
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    // previousIndex() returns invalid, if root found+
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    QModelIndex previousIndex = index;+
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    QModelIndex previousIndexTemp = mModelIterator->previousIndex(previousIndex);+
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    while (previousIndex.isValid() && counter < maxStepCount) {+
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        counter++;+
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        previousIndexTemp = mModelIterator->previousIndex(previousIndex);+
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        if (previousIndexTemp.isValid()) {+
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            previousIndex = previousIndexTemp;+
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        }+
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    }+
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    return previousIndex;+
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}+
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+
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/*!+
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    \reimp+
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*/+
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bool HbTreeViewPrivate::handleScrollBar(Qt::Orientation orientation)+
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{+
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    if (!mContainer->itemRecycling()+
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        || orientation == Qt::Horizontal+
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        || mContainer->itemPrototypes().count() != 1+
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        || mContainer->items().isEmpty()+
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        || !mVerticalScrollBar) {+
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        return false;+
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    } else {+
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        return true;+
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    }+
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}+
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+
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bool HbTreeViewPrivate::animationEnabled(bool insertOperation)+
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{+
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    if (mInSetExpanded) {+
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        if (insertOperation) {+
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            if (mEnabledAnimations & HbAbstractItemView::Expand) {+
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                return true;+
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            }+
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        } else {+
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            if (mEnabledAnimations & HbAbstractItemView::Collapse) {+
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                return true;+
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            }+
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        }+
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        return false;+
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    } else {+
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        return HbAbstractItemViewPrivate::animationEnabled(insertOperation);+
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+
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    }+
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}+
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+
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