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/***************************************************************************** |
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* |
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* Copyright (C) 2009 - 2025 Florian Pose <fp@igh.de> |
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* |
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* This file is part of the QtPdCom library. |
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* |
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* The QtPdCom library is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU Lesser General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or (at your |
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* option) any later version. |
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* |
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* The QtPdCom library is distributed in the hope that it will be useful, but |
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY |
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public |
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* License for more details. |
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* |
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* You should have received a copy of the GNU Lesser General Public License |
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* along with the QtPdCom Library. If not, see <http://www.gnu.org/licenses/>. |
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* |
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****************************************************************************/ |
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#include "MessageModelUnion.h" |
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using QtPdCom::MessageModelUnion; |
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#include "MessageModel.h" |
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#include <QAbstractProxyModel> |
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#if PD_DEBUG_MESSAGE_MODEL |
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#include <QDebug> |
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#endif |
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/***************************************************************************** |
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* MessageModelUnion::Impl |
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****************************************************************************/ |
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struct MessageModelUnion::Impl |
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{ |
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Impl() = delete; |
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Impl(MessageModelUnion *parent): |
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parentModel {parent} |
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{} |
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MessageModelUnion *const parentModel; |
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struct SourceModel |
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{ |
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~SourceModel() { QObject::disconnect(connection); } |
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QAbstractItemModel *model; |
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QString name; |
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const QtPdCom::Message *announcedMessage; |
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QMetaObject::Connection connection; |
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}; |
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QList<SourceModel> sourceModels; |
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struct SourceEntry |
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{ |
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SourceModel *sourceModel; |
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int row; // original row in source model |
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}; |
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QVector<SourceEntry> mergedRows; |
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enum { SortColumn = 1 }; |
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void rebuildMergedRows() |
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{ |
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parentModel->beginResetModel(); |
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mergedRows.clear(); |
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for (auto &sourceModel : sourceModels) { |
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int rows = sourceModel.model->rowCount(); |
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for (int row = 0; row < rows; ++row) { |
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mergedRows.append({&sourceModel, row}); |
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} |
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} |
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std::sort( |
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mergedRows.begin(), |
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mergedRows.end(), |
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[this](const SourceEntry &a, const SourceEntry &b) { |
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QVariant va = a.sourceModel->model->data( |
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a.sourceModel->model->index( |
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a.row, |
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SortColumn)); |
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QVariant vb = b.sourceModel->model->data( |
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b.sourceModel->model->index( |
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b.row, |
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SortColumn)); |
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return vb.toString() < va.toString(); |
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}); |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << "(): Now " << mergedRows.size() |
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<< " rows."; |
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#endif |
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parentModel->endResetModel(); |
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} |
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void currentMessage( |
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SourceModel *sourceModel, |
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const QtPdCom::Message *message) |
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{ |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << sourceModel << message; |
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#endif |
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sourceModel->announcedMessage = message; |
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updateCurrentMessage(); |
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} |
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void updateCurrentMessage() |
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{ |
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const QtPdCom::Message *candidate {nullptr}; |
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for (auto &sourceModel : sourceModels) { |
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if (sourceModel.announcedMessage) { |
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if (not candidate |
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or sourceModel.announcedMessage->getType() |
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> candidate->getType()) { |
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candidate = sourceModel.announcedMessage; |
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} |
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} |
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} |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << candidate; |
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#endif |
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emit parentModel->currentMessage(candidate); |
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} |
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}; |
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/***************************************************************************** |
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* MessageModelUnion |
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****************************************************************************/ |
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/** Constructor. |
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*/ |
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MessageModelUnion::MessageModelUnion(QObject *parent): |
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QAbstractTableModel(parent), |
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impl(std::unique_ptr<Impl>(new MessageModelUnion::Impl(this))) |
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{} |
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/****************************************************************************/ |
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/** Destructor. |
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*/ |
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MessageModelUnion::~MessageModelUnion() |
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{ |
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clearSourceModels(); |
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} |
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/****************************************************************************/ |
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void MessageModelUnion::addSourceModel( |
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QAbstractItemModel *model, |
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QString sourceName) |
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{ |
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impl->sourceModels.push_back( |
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{model, |
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sourceName, |
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nullptr, // announced message |
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QMetaObject::Connection()}); |
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auto *sourceModel = &impl->sourceModels.last(); |
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connect(model, &QAbstractTableModel::rowsInserted, [this]() { |
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impl->rebuildMergedRows(); |
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}); |
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connect(model, &QAbstractTableModel::rowsRemoved, [this]() { |
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impl->rebuildMergedRows(); |
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}); |
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connect(model, &QAbstractTableModel::dataChanged, [this]() { |
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impl->rebuildMergedRows(); |
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}); |
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connect(model, &QAbstractTableModel::layoutChanged, [this]() { |
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impl->rebuildMergedRows(); |
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}); |
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connect(model, &QAbstractTableModel::modelReset, [this]() { |
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impl->rebuildMergedRows(); |
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}); |
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// find a QtPdCom::MessageModel after a chain of QAbstractProxyModels |
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QtPdCom::MessageModel *messageModel {nullptr}; |
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while (true) { |
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auto *proxy {qobject_cast<QAbstractProxyModel *>(model)}; |
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if (not proxy) { |
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messageModel = qobject_cast<QtPdCom::MessageModel *>(model); |
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break; |
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} |
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model = proxy->sourceModel(); |
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} |
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if (messageModel) { |
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sourceModel->connection = |
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connect(messageModel, |
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&MessageModel::currentMessage, |
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[this, sourceModel](const QtPdCom::Message *message) { |
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impl->currentMessage(sourceModel, message); |
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}); |
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} |
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impl->rebuildMergedRows(); |
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} |
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/****************************************************************************/ |
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void MessageModelUnion::removeSourceModel(QAbstractItemModel *model) |
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{ |
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auto it = std::remove_if( |
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impl->sourceModels.begin(), |
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impl->sourceModels.end(), |
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[model](const Impl::SourceModel &s) { return s.model == model; }); |
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impl->sourceModels.erase(it, impl->sourceModels.end()); |
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impl->rebuildMergedRows(); |
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} |
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/****************************************************************************/ |
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void MessageModelUnion::clearSourceModels() |
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{ |
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beginResetModel(); |
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impl->sourceModels.clear(); |
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endResetModel(); |
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} |
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/****************************************************************************/ |
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int MessageModelUnion::rowCount(const QModelIndex &) const |
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{ |
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return impl->mergedRows.count(); |
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} |
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/****************************************************************************/ |
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int MessageModelUnion::columnCount(const QModelIndex &) const |
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{ |
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return 4; |
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} |
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/****************************************************************************/ |
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QVariant MessageModelUnion::data(const QModelIndex &index, int role) const |
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{ |
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QVariant ret; |
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if (index.isValid() and index.row() < impl->mergedRows.size()) { |
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auto entry {impl->mergedRows[index.row()]}; |
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QModelIndex sourceIndex = |
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entry.sourceModel->model->index(entry.row, index.column()); |
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if (index.column() >= TextColumn and index.column() < SourceColumn) { |
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ret = entry.sourceModel->model->data(sourceIndex, role); |
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} |
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else if (index.column() == SourceColumn and role == Qt::DisplayRole) { |
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ret = entry.sourceModel->name; |
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} |
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} |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << index << role << ret; |
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#endif |
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return ret; |
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} |
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/****************************************************************************/ |
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QVariant |
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MessageModelUnion::headerData(int section, Qt::Orientation o, int role) const |
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{ |
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if (role == Qt::DisplayRole && o == Qt::Horizontal) { |
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switch (section) { |
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case TextColumn: |
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return tr("Message"); |
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case TimeOccurredColumn: |
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return tr("Time"); |
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case TimeResetColumn: |
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return tr("Reset"); |
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case SourceColumn: |
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return tr("Source"); |
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default: |
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return QVariant(); |
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} |
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} |
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else { |
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return QVariant(); |
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} |
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} |
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/****************************************************************************/ |
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Qt::ItemFlags MessageModelUnion::flags(const QModelIndex &index) const |
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{ |
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Qt::ItemFlags ret; |
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if (index.isValid() and index.row() < impl->mergedRows.size()) { |
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auto entry {impl->mergedRows[index.row()]}; |
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QModelIndex sourceIndex = |
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entry.sourceModel->model->index(entry.row, index.column()); |
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if (index.column() >= TextColumn and index.column() < SourceColumn) { |
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ret = entry.sourceModel->model->flags(sourceIndex); |
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} |
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else if (index.column() == SourceColumn) { |
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QModelIndex textIndex = |
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entry.sourceModel->model->index(entry.row, TextColumn); |
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ret = entry.sourceModel->model->flags(textIndex); |
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} |
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} |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << index << ret; |
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#endif |
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return ret; |
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} |
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/****************************************************************************/ |
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bool MessageModelUnion::canFetchMore(const QModelIndex &index) const |
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{ |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << index; |
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#endif |
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if (not index.isValid()) { |
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// root layer - return true if *any* model can fetch more rows |
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for (auto &sourceModel : impl->sourceModels) { |
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if (sourceModel.model->canFetchMore(index)) { |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << sourceModel.model << sourceModel.name << "yes"; |
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#endif |
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return true; |
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} |
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} |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << "no"; |
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#endif |
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return false; |
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} |
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else if (index.row() < impl->mergedRows.size()) { |
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auto entry {impl->mergedRows[index.row()]}; |
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auto sourceIndex { |
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entry.sourceModel->model->index(entry.row, index.column())}; |
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auto canFetch {entry.sourceModel->model->canFetchMore(sourceIndex)}; |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << "specific" << canFetch; |
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#endif |
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return canFetch; |
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} |
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else { |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << "invalid"; |
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#endif |
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return false; |
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} |
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} |
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/****************************************************************************/ |
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void MessageModelUnion::fetchMore(const QModelIndex &index) |
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{ |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << index; |
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#endif |
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if (not index.isValid()) { |
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// root layer - pass on to *any* model that can fetch more rows |
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for (auto &sourceModel : impl->sourceModels) { |
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if (sourceModel.model->canFetchMore(index)) { |
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#if PD_DEBUG_MESSAGE_MODEL |
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qDebug() << __func__ << sourceModel.model << sourceModel.name; |
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#endif |
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sourceModel.model->fetchMore(index); |
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} |
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} |
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} |
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else if (index.row() < impl->mergedRows.size()) { |
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auto entry {impl->mergedRows[index.row()]}; |
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auto sourceIndex { |
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entry.sourceModel->model->index(entry.row, index.column())}; |
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entry.sourceModel->model->fetchMore(sourceIndex); |
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} |
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} |
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/****************************************************************************/ |
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