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/*
modelmodel.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2010 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
Author: Volker Krause <volker.krause@kdab.com>
SPDX-License-Identifier: GPL-2.0-or-later
Contact KDAB at <info@kdab.com> for commercial licensing options.
*/
#include "modelmodel.h"
#include <QThread>
using namespace GammaRay;
ModelModel::ModelModel(QObject *parent)
: ObjectModelBase<QAbstractItemModel>(parent)
{
}
QVariant ModelModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
QAbstractItemModel *model = static_cast<QAbstractItemModel *>(index.internalPointer());
if (!model)
return QVariant();
return dataForObject(model, index, role);
}
int ModelModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid()) {
if (parent.column() > 0)
return 0;
QAbstractItemModel *sourceModel = static_cast<QAbstractItemModel *>(parent.internalPointer());
Q_ASSERT(sourceModel);
const QVector<QAbstractProxyModel *> proxies = proxiesForModel(sourceModel);
return proxies.size();
}
return m_models.size();
}
QModelIndex ModelModel::parent(const QModelIndex &child) const
{
if (!child.isValid())
return {};
QAbstractItemModel *model = static_cast<QAbstractItemModel *>(child.internalPointer());
Q_ASSERT(model);
if (m_models.contains(model))
return {};
QAbstractProxyModel *proxy = qobject_cast<QAbstractProxyModel *>(model);
Q_ASSERT(proxy);
return indexForModel(proxy->sourceModel());
}
QModelIndex ModelModel::index(int row, int column, const QModelIndex &parent) const
{
if (parent.isValid()) {
QAbstractItemModel *model = static_cast<QAbstractItemModel *>(parent.internalPointer());
const QVector<QAbstractProxyModel *> proxies = proxiesForModel(model);
if (proxies.size() <= row)
return {};
return createIndex(row, column, proxies.at(row));
}
return createIndex(row, column, m_models.at(row));
}
void ModelModel::objectAdded(QObject *obj)
{
if (obj->thread() != QThread::currentThread()) { // ignore models in secondary threads, they can be deleted at any time
return;
}
QAbstractProxyModel *proxy = qobject_cast<QAbstractProxyModel *>(obj);
if (proxy) {
beginResetModel(); // FIXME
if (proxy->sourceModel())
m_proxies.push_back(proxy);
else
m_models.push_back(proxy);
connect(proxy, &QAbstractProxyModel::sourceModelChanged, this, [this, proxy]() {
beginResetModel(); // FIXME
if (proxy->sourceModel()) {
const auto i = m_models.indexOf(proxy);
if (i >= 0)
m_models.remove(i);
m_proxies.push_back(proxy);
} else {
const auto i = m_proxies.indexOf(proxy);
if (i >= 0)
m_proxies.remove(i);
m_models.push_back(proxy);
}
endResetModel();
});
endResetModel();
return;
}
QAbstractItemModel *model = qobject_cast<QAbstractItemModel *>(obj);
if (model) {
beginInsertRows(QModelIndex(), m_models.size(), m_models.size());
m_models.push_back(model);
endInsertRows();
}
}
void ModelModel::objectRemoved(QObject *obj)
{
// do not dereference!
QAbstractItemModel *unsafeModelPtr = nullptr;
memcpy(&unsafeModelPtr, &obj, sizeof(unsafeModelPtr));
int index = m_models.indexOf(unsafeModelPtr);
if (index >= 0 && index < m_models.size()) {
beginRemoveRows(QModelIndex(), index, index);
m_models.remove(index);
endRemoveRows();
}
for (auto it = m_proxies.begin();
it != m_proxies.end(); ++it) {
if (*it == obj) {
beginResetModel(); // FIXME
m_proxies.erase(it);
endResetModel();
return;
}
}
}
QModelIndex ModelModel::indexForModel(QAbstractItemModel *model) const
{
if (!model)
return {};
QAbstractProxyModel *proxy = qobject_cast<QAbstractProxyModel *>(model);
if (!proxy) {
Q_ASSERT(m_models.contains(model));
return index(m_models.indexOf(model), 0, QModelIndex());
}
QAbstractItemModel *sourceModel = proxy->sourceModel();
const QModelIndex parentIndex = indexForModel(sourceModel);
const QVector<QAbstractProxyModel *> proxies = proxiesForModel(sourceModel);
Q_ASSERT(proxies.contains(proxy));
return index(proxies.indexOf(proxy), 0, parentIndex);
}
QVector<QAbstractProxyModel *> ModelModel::proxiesForModel(QAbstractItemModel *model) const
{
QVector<QAbstractProxyModel *> proxies;
if (!model)
return proxies;
for (QAbstractProxyModel *proxy : m_proxies) {
if (proxy && proxy->sourceModel() == model)
proxies.push_back(proxy);
}
return proxies;
}
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