qt-creator/src/plugins/help/openpagesmodel.cpp

/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2012 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: http://www.qt-project.org/
**
**
** GNU Lesser General Public License Usage
**
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this file.
** Please review the following information to ensure the GNU Lesser General
** Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** Other Usage
**
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
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**************************************************************************/

#include "openpagesmodel.h"
#include "helpviewer.h"

#include <QUrl>

using namespace Help::Internal;

OpenPagesModel::OpenPagesModel(QObject *parent)
    : QAbstractTableModel(parent)
{
}

int OpenPagesModel::rowCount(const QModelIndex &parent) const
{
    return  parent.isValid() ? 0 : m_pages.count();
}

int OpenPagesModel::columnCount(const QModelIndex &/*parent*/) const
{
    return 2;
}

QVariant OpenPagesModel::data(const QModelIndex &index, int role) const
{
    if (!index.isValid() || index.row() >= rowCount()
        || index.column() >= columnCount() - 1)
        return QVariant();

    switch (role) {
        case Qt::ToolTipRole:
            return m_pages.at(index.row())->source().toString();
        case Qt::DisplayRole: {
            QString title = m_pages.at(index.row())->title();
            title.replace(QLatin1Char('&'), QLatin1String("&&"));
            return title.isEmpty() ? tr("(Untitled)") : title;
        }
        default:
            break;
    }
    return QVariant();
}

void OpenPagesModel::addPage(const QUrl &url, qreal zoom)
{
    beginInsertRows(QModelIndex(), rowCount(), rowCount());
    HelpViewer *page = new HelpViewer(zoom);
    connect(page, SIGNAL(titleChanged()), this, SLOT(handleTitleChanged()));
    m_pages << page;
    endInsertRows();
    page->setSource(url);
}

void OpenPagesModel::removePage(int index)
{
    Q_ASSERT(index >= 0 && index < rowCount());
    beginRemoveRows(QModelIndex(), index, index);
    HelpViewer *page = m_pages.at(index);
    page->stop();
    m_pages.removeAt(index);
    endRemoveRows();
    page->deleteLater();
}

HelpViewer *OpenPagesModel::pageAt(int index) const
{
    Q_ASSERT(index >= 0 && index < rowCount());
    return m_pages.at(index);
}

void OpenPagesModel::handleTitleChanged()
{
    HelpViewer *page = static_cast<HelpViewer *>(sender());
    const int row = m_pages.indexOf(page);
    Q_ASSERT(row != -1 );
    const QModelIndex &item = index(row, 0);
    emit dataChanged(item, item);
}