1 /****************************************************************************

     2 **

     3 ** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

     4 ** All rights reserved.

     5 ** Contact: Nokia Corporation (developer.feedback@nokia.com)

     6 **

     7 ** This file is part of the HbWidgets module of the UI Extensions for Mobile.

     8 **

     9 ** GNU Lesser General Public License Usage

    10 ** This file may be used under the terms of the GNU Lesser General Public

    11 ** License version 2.1 as published by the Free Software Foundation and

    12 ** appearing in the file LICENSE.LGPL included in the packaging of this file.

    13 ** Please review the following information to ensure the GNU Lesser General

    14 ** Public License version 2.1 requirements will be met:

    15 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

    16 **

    17 ** In addition, as a special exception, Nokia gives you certain additional

    18 ** rights.  These rights are described in the Nokia Qt LGPL Exception

    19 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

    20 **

    21 ** If you have questions regarding the use of this file, please contact

    22 ** Nokia at developer.feedback@nokia.com.

    23 **

    24 ****************************************************************************/

    25     

    26 #include "hbtreeview_p.h"

    27 #include "hbtreeview.h"

    28 

    29 #include "hbtreeviewitem.h"

    30 #include "hbtreeitemselectionmodel_p.h"

    31 #include "hbtreemodeliterator_p.h"

    32 

    33 const QString KDefaultLayoutOption = "default";

    34 

    35 HbTreeViewPrivate::HbTreeViewPrivate() :

    36     HbAbstractItemViewPrivate(),

    37     mSelectionStarted(false)

    38 {

    39 }

    40 

    41 HbTreeViewPrivate::~HbTreeViewPrivate()

    42 {

    43 }

    44 

    45 void HbTreeViewPrivate::init()

    46 {

    47     Q_Q(HbTreeView);

    48 

    49     q->setClampingStyle(HbScrollArea::StrictClamping);

    50     q->setFrictionEnabled(0);

    51     q->setItemRecycling(true);

    52     q->setScrollDirections(Qt::Horizontal | Qt::Vertical);

    53     mLayoutOptionName = KDefaultLayoutOption;

    54     treeModelIterator()->setItemContainer(mContainer, HbTreeViewItem::ExpansionKey);

    55 }

    56 

    57 bool HbTreeViewPrivate::isParentValid(const QModelIndex &parent) const

    58 {

    59     bool valid = false;

    60     QModelIndex currentParent = parent;

    61     while (!valid) {

    62         if (currentParent == mModelIterator->rootIndex()) {

    63             valid = true;

    64         } else if (currentParent.isValid()) {

    65             currentParent = currentParent.parent();

    66         } else {

    67             break;

    68         }

    69     }

    70     return valid;

    71 }

    72 

    73 bool HbTreeViewPrivate::isChild(const QModelIndex &index, const QModelIndex &parent) const

    74 {

    75     bool isChild = false;

    76     QModelIndex currentIndex = index;

    77     while (!isChild) {

    78         if (currentIndex.parent() == parent) {

    79             isChild = true;

    80         } else if (currentIndex.isValid()) {

    81             currentIndex = currentIndex.parent();

    82         } else {

    83             break;

    84         }

    85     }

    86     return isChild;

    87 }

    88 

    89 QModelIndex HbTreeViewPrivate::searchIndexUp( 

    90                             const   QModelIndex &index,

    91                             int     maxStepCount) const

    92 {

    93     Q_Q(const HbTreeView);

    94 

    95     QModelIndex root = q->rootIndex();

    96     int counter = 1;

    97 

    98     // previousIndex() returns invalid, if root found

    99     QModelIndex previousIndex = index;

   100     QModelIndex previousIndexTemp = mModelIterator->previousIndex(previousIndex);

   101     while (previousIndex.isValid() && counter < maxStepCount) {

   102         counter++;

   103         previousIndexTemp = mModelIterator->previousIndex(previousIndex);

   104         if (previousIndexTemp.isValid()) {

   105             previousIndex = previousIndexTemp;

   106         }

   107     }

   108     return previousIndex;

   109 }