400 lines
11 KiB
C++
400 lines
11 KiB
C++
/*
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* Copyright 2010 by Marco Martin <mart@kde.org>
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU Library General Public License as
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* published by the Free Software Foundation; either version 2, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "datamodel.h"
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#include "datasource_p.h"
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#include <QTimer>
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#include <KDebug>
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namespace Plasma
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{
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SortFilterModel::SortFilterModel(QObject* parent)
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: QSortFilterProxyModel(parent)
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{
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setObjectName("SortFilterModel");
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setDynamicSortFilter(true);
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connect(this, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
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this, SIGNAL(countChanged()));
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connect(this, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
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this, SIGNAL(countChanged()));
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connect(this, SIGNAL(modelReset()),
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this, SIGNAL(countChanged()));
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}
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SortFilterModel::~SortFilterModel()
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{
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}
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void SortFilterModel::syncRoleNames()
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{
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m_roleIds.clear();
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setRoleNames(sourceModel()->roleNames());
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QHash<int, QByteArray>::const_iterator i;
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for (i = roleNames().constBegin(); i != roleNames().constEnd(); ++i) {
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m_roleIds[i.value()] = i.key();
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}
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setFilterRole(m_filterRole);
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setSortRole(m_sortRole);
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}
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int SortFilterModel::roleNameToId(const QString &name)
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{
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if (!m_roleIds.contains(name)) {
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return -1;
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}
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return m_roleIds.value(name);
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}
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void SortFilterModel::setModel(QObject *source)
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{
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QAbstractItemModel *model = qobject_cast<QAbstractItemModel *>(source);
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if (!model) {
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kWarning() << "Error: QAbstractItemModel type expected";
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return;
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}
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connect(model, SIGNAL(modelReset()), this, SLOT(syncRoleNames()));
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QSortFilterProxyModel::setSourceModel(model);
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}
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void SortFilterModel::setFilterRegExp(const QString &exp)
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{
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//FIXME: this delaying of the reset signal seems to make the views behave a bit better, i.e. less holes and avoids some crashes, in theory shouldn't be necessary
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blockSignals(true);
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QSortFilterProxyModel::setFilterRegExp(QRegExp(exp, Qt::CaseInsensitive));
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blockSignals(false);
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reset();
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}
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QString SortFilterModel::filterRegExp() const
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{
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return QSortFilterProxyModel::filterRegExp().pattern();
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}
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void SortFilterModel::setFilterRole(const QString &role)
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{
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QSortFilterProxyModel::setFilterRole(roleNameToId(role));
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m_filterRole = role;
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}
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QString SortFilterModel::filterRole() const
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{
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return m_filterRole;
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}
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void SortFilterModel::setSortRole(const QString &role)
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{
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QSortFilterProxyModel::setSortRole(roleNameToId(role));
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m_sortRole = role;
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sort(0, sortOrder());
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}
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QString SortFilterModel::sortRole() const
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{
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return m_sortRole;
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}
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void SortFilterModel::setSortOrder(const Qt::SortOrder order)
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{
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sort(0, order);
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}
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DataModel::DataModel(QObject* parent)
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: QAbstractItemModel(parent),
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m_dataSource(0),
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m_maxRoleId(Qt::UserRole+1)
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{
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//There is one reserved role name: DataEngineSource
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m_roleNames[m_maxRoleId] = "DataEngineSource";
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m_roleIds["DataEngineSource"] = m_maxRoleId;
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++m_maxRoleId;
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setObjectName("DataModel");
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connect(this, SIGNAL(rowsInserted(const QModelIndex &, int, int)),
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this, SIGNAL(countChanged()));
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connect(this, SIGNAL(rowsRemoved(const QModelIndex &, int, int)),
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this, SIGNAL(countChanged()));
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connect(this, SIGNAL(modelReset()),
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this, SIGNAL(countChanged()));
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m_roleNamesTimer = new QTimer(this);
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m_roleNamesTimer->setSingleShot(true);
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connect(m_roleNamesTimer, SIGNAL(timeout()),
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this, SLOT(syncRoleNames()));
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}
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DataModel::~DataModel()
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{
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}
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void DataModel::dataUpdated(const QString &sourceName, const Plasma::DataEngine::Data &data)
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{
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if (!m_keyRoleFilter.isEmpty()) {
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QRegExp sourceRegExp(m_sourceFilter);
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//a key that matches the one we want exists and is a list of DataEngine::Data
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if (data.contains(m_keyRoleFilter) &&
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data.value(m_keyRoleFilter).canConvert<QVariantList>() &&
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//matches the source filter regexp?
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(m_sourceFilter.isEmpty() || (sourceRegExp.isValid() && sourceRegExp.exactMatch(sourceName)))) {
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setItems(sourceName, data.value(m_keyRoleFilter).value<QVariantList>());
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//try to match the key we want with a regular expression if set
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} else {
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QRegExp regExp(m_keyRoleFilter);
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if (regExp.isValid() &&
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//matches the source filter regexp?
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(m_sourceFilter.isEmpty() || (sourceRegExp.isValid() && sourceRegExp.exactMatch(sourceName)))) {
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QHash<QString, QVariant>::const_iterator i;
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QVariantList list;
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for (i = data.constBegin(); i != data.constEnd(); ++i) {
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if (regExp.exactMatch(i.key())) {
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list.append(i.value());
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}
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}
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setItems(sourceName, list);
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}
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}
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//an item is represented by a source: keys are roles m_roleLevel == FirstLevel
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} else {
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QVariantList list;
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if (!m_dataSource->data().isEmpty()) {
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QVariantMap::const_iterator i = m_dataSource->data().constBegin();
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QRegExp sourceRegExp(m_sourceFilter);
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while (i != m_dataSource->data().constEnd()) {
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QVariant value = i.value();
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if (value.isValid() &&
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value.canConvert<Plasma::DataEngine::Data>() &&
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//matches the source filter regexp?
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(m_sourceFilter.isEmpty() || (sourceRegExp.isValid() && sourceRegExp.exactMatch(i.key())))) {
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Plasma::DataEngine::Data data = value.value<Plasma::DataEngine::Data>();
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data["DataEngineSource"] = i.key();
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list.append(data);
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}
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++i;
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}
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}
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setItems(QString(), list);
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}
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}
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void DataModel::setDataSource(QObject *object)
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{
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DataSource *source = qobject_cast<DataSource *>(object);
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if (!source) {
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kWarning() << "Error: DataSource type expected";
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return;
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}
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if (m_dataSource == source) {
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return;
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}
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disconnect(m_dataSource, 0, this, 0);
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m_dataSource = source;
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connect(m_dataSource, SIGNAL(newData(const QString &, const Plasma::DataEngine::Data &)),
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this, SLOT(dataUpdated(const QString &, const Plasma::DataEngine::Data &)));
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connect(m_dataSource, SIGNAL(sourceRemoved(const QString &)), this, SLOT(removeSource(const QString &)));
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connect(m_dataSource, SIGNAL(sourceDisconnected(const QString &)), this, SLOT(removeSource(const QString &)));
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}
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QObject *DataModel::dataSource() const
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{
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return m_dataSource;
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}
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void DataModel::setKeyRoleFilter(const QString& key)
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{
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if (m_keyRoleFilter == key) {
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return;
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}
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m_keyRoleFilter = key;
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}
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void DataModel::setSourceFilter(const QString& key)
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{
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if (m_sourceFilter == key) {
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return;
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}
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m_sourceFilter = key;
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}
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QString DataModel::sourceFilter() const
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{
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return m_sourceFilter;
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}
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QString DataModel::keyRoleFilter() const
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{
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return m_keyRoleFilter;
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}
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void DataModel::setItems(const QString &sourceName, const QVariantList &list)
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{
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emit modelAboutToBeReset();
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//convert to vector, so data() will be O(1)
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m_items[sourceName] = list.toVector();
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if (!list.isEmpty()) {
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if (list.first().canConvert<QVariantHash>()) {
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foreach (const QString& roleName, list.first().value<QVariantHash>().keys()) {
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if (!m_roleIds.contains(roleName)) {
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++m_maxRoleId;
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m_roleNames[m_maxRoleId] = roleName.toLatin1();
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m_roleIds[roleName] = m_maxRoleId;
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}
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}
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} else {
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foreach (const QString& roleName, list.first().value<QVariantMap>().keys()) {
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if (!m_roleIds.contains(roleName)) {
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++m_maxRoleId;
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m_roleNames[m_maxRoleId] = roleName.toLatin1();
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m_roleIds[roleName] = m_maxRoleId;
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}
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}
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}
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setRoleNames(m_roleNames);
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}
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m_roleNamesTimer->start(0);
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}
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void DataModel::syncRoleNames()
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{
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setRoleNames(m_roleNames);
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//make the declarative view reload everything,
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//would be nice an incremental update but is not possible
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emit modelReset();
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}
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void DataModel::removeSource(const QString &sourceName)
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{
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//FIXME: this could be way more efficient by not resetting the whole model
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//FIXME: find a way to remove only the proper things also in the case where sources are items
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emit modelAboutToBeReset();
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m_items.remove(sourceName);
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emit modelReset();
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}
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QVariant DataModel::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid() || index.column() > 0 ||
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index.row() < 0 || index.row() >= countItems()){
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return QVariant();
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}
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int count = 0;
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int actualRow = 0;
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QString source;
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QMap<QString, QVector<QVariant> >::const_iterator i;
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for (i = m_items.constBegin(); i != m_items.constEnd(); ++i) {
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const int oldCount = count;
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count += i.value().count();
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if (index.row() < count) {
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source = i.key();
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actualRow = index.row() - oldCount;
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break;
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}
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}
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//is it the reserved role: DataEngineSource ?
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//also, if each source is an item DataEngineSource is a role between all the others, otherwise we know it from the role variable
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if (!m_keyRoleFilter.isEmpty() && m_roleNames.value(role) == "DataEngineSource") {
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return source;
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//sub items are some times QVariantHash some times QVariantMaps
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} else if (m_items.value(source).value(actualRow).canConvert<QVariantHash>()) {
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return m_items.value(source).value(actualRow).value<QVariantHash>().value(m_roleNames.value(role));
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} else {
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return m_items.value(source).value(actualRow).value<QVariantMap>().value(m_roleNames.value(role));
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}
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}
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QVariant DataModel::headerData(int section, Qt::Orientation orientation, int role) const
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{
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Q_UNUSED(section)
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Q_UNUSED(orientation)
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Q_UNUSED(role)
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return QVariant();
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}
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QModelIndex DataModel::index(int row, int column, const QModelIndex &parent) const
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{
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if (parent.isValid() || column > 0 || row < 0 || row >= countItems()) {
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return QModelIndex();
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}
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return createIndex(row, column, 0);
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}
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QModelIndex DataModel::parent(const QModelIndex &child) const
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{
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Q_UNUSED(child)
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return QModelIndex();
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}
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int DataModel::rowCount(const QModelIndex &parent) const
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{
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//this is not a tree
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//TODO: make it possible some day?
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if (parent.isValid()) {
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return 0;
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}
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return countItems();
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}
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int DataModel::columnCount(const QModelIndex &parent) const
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{
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if (parent.isValid()) {
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return 0;
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}
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return 1;
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}
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int DataModel::roleNameToId(const QString &name)
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{
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if (!m_roleIds.contains(name)) {
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return -1;
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}
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return m_roleIds.value(name);
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}
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}
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#include "datamodel.moc"
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