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 "hblistmodel_p.h"

    27 #include "hblistwidgetitem_p.h"

    28 

    29 #include <hblistwidgetitem.h>

    30 

    31 HbListModel::HbListModel(QObject *parent) : 

    32     QAbstractListModel(parent)

    33 {

    34 }

    35 

    36 HbListModel::~HbListModel()

    37 {

    38     qDeleteAll(items);

    39 }

    40 

    41 void HbListModel::clear()

    42 {

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

    44         if (items.at(i)) {

    45             items.at(i)->d->id = -1;

    46             delete items.at(i);

    47         }

    48     }

    49     items.clear();

    50     reset();

    51 }

    52 

    53 HbListWidgetItem *HbListModel::item(int row) const

    54 {

    55     return items.value(row);

    56 }

    57 

    58 void HbListModel::insert(int row, HbListWidgetItem *item)

    59 {

    60     item->d->mModel = this;

    61     //Do not accept duplicate inserts.

    62     //Occurs e.g if user of HbListWidgetitem creates HbListWidgetItem and gives a parent

    63     //(HbListWidget) but still calls HbListWidget::addItem()

    64     if (!item || items.contains(item) )

    65         return;

    66 

    67     if (row < 0)

    68         row = 0;

    69     else if (row > items.count())

    70         row = items.count();

    71     beginInsertRows(QModelIndex(), row, row);

    72     items.insert(row, item);

    73     item->d->id = row;

    74     endInsertRows();

    75 }

    76 

    77 void HbListModel::appendRow(HbListWidgetItem *item)

    78 {

    79     item->d->mModel = this;

    80     insert(rowCount(),item);

    81 }

    82 

    83 HbListWidgetItem *HbListModel::take(int row)

    84 {

    85     if (row < 0 || row >= items.count())

    86         return 0;

    87 

    88     beginRemoveRows(QModelIndex(), row, row);

    89     items.at(row)->d->id = -1;

    90     HbListWidgetItem *item = items.takeAt(row);

    91     endRemoveRows();

    92     return item;

    93 }

    94 

    95 int HbListModel::rowCount(const QModelIndex &parent) const

    96 {

    97      return parent.isValid() ? 0 : items.count();

    98 }

    99 

   100 QModelIndex HbListModel::index(HbListWidgetItem *item) const

   101 {

   102     if (!item || items.isEmpty())

   103         return QModelIndex();

   104 

   105     int row;

   106     const int id = item->d->id;

   107 

   108     if (id >= 0 && id < items.count() && items.at(id) == item)

   109     {

   110         row = id;

   111     }

   112     else

   113     {

   114         // we need to search for the item

   115         row = items.lastIndexOf(item);  // lastIndexOf is an optimization in favor of indexOf

   116         if (row == -1) // not found

   117             return QModelIndex();

   118         item->d->id = row;

   119     }

   120     return createIndex(row, 0, item);

   121 }

   122 

   123 QModelIndex HbListModel::index(int row, int column, const QModelIndex &parent) const

   124 {

   125     if (hasIndex(row, column, parent))

   126         return createIndex(row, column, items.at(row));

   127 

   128      return QModelIndex();

   129 }

   130 

   131 QVariant HbListModel::data(const QModelIndex &index, int role) const

   132 {

   133     if (!index.isValid() || index.row() >= items.count())

   134         return QVariant();

   135     return items.at(index.row())->data(role);

   136 

   137 }

   138 

   139 bool HbListModel::setData(const QModelIndex &index, const QVariant &value, int role)

   140 {

   141     if (!index.isValid() || index.row() >= items.count())

   142         return false;

   143     items.at(index.row())->setData(value,role);

   144     return true;

   145 }

   146 

   147 bool HbListModel::removeRows(int row, int count, const QModelIndex &parent)

   148 {

   149     if (count < 1 || row < 0 || (row + count) > rowCount() || parent.isValid())

   150         return false;

   151 

   152     beginRemoveRows(QModelIndex(), row, row + count - 1);

   153     HbListWidgetItem *itm = 0;

   154     for (int r = row; r < row + count; ++r) {

   155         itm = items.takeAt(row);

   156         itm->d->id = -1;

   157         delete itm;

   158     }

   159     endRemoveRows();

   160     return true;

   161 }

   162 

   163 void HbListModel::itemChanged(HbListWidgetItem *item)

   164 {

   165     QModelIndex idx = index(item);

   166     emit dataChanged(idx, idx);

   167 }

   168 

   169 Qt::ItemFlags HbListModel::flags(const QModelIndex &index) const

   170 {

   171     if (index.isValid()) {

   172         const HbListWidgetItem *item = items.at(index.row());

   173         if (item) {

   174             return item->d->flags;

   175         } 

   176     }

   177     

   178     return 0;

   179 }

   180 

   181 #include "moc_hblistmodel_p.cpp"

   182 

   183