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/*
selectionmodelmodel.cpp
This file is part of GammaRay, the Qt application inspection and manipulation tool.
SPDX-FileCopyrightText: 2016 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 "selectionmodelmodel.h"
#include <core/objectdataprovider.h>
#include <QItemSelectionModel>
#include <algorithm>
using namespace GammaRay;
SelectionModelModel::SelectionModelModel(QObject *parent)
: ObjectModelBase<QAbstractTableModel>(parent)
, m_model(nullptr)
{
}
SelectionModelModel::~SelectionModelModel() = default;
void SelectionModelModel::objectCreated(QObject *obj)
{
Q_ASSERT(obj);
auto model = qobject_cast<QItemSelectionModel *>(obj);
if (!model)
return;
auto it = std::lower_bound(m_selectionModels.begin(), m_selectionModels.end(), model);
if (it != m_selectionModels.end() && *it == model)
return;
m_selectionModels.insert(it, model);
connect(model, &QItemSelectionModel::selectionChanged, this, &SelectionModelModel::selectionChanged);
connect(model, &QItemSelectionModel::modelChanged, this, &SelectionModelModel::sourceModelChanged);
if (!m_model || model->model() != m_model)
return;
it = std::lower_bound(m_currentSelectionModels.begin(), m_currentSelectionModels.end(), model);
const auto row = std::distance(m_currentSelectionModels.begin(), it);
beginInsertRows(QModelIndex(), row, row);
m_currentSelectionModels.insert(it, model);
endInsertRows();
}
void SelectionModelModel::objectDestroyed(QObject *obj)
{
Q_ASSERT(obj);
// do not dereference!
QItemSelectionModel *unsafeModelPtr = nullptr;
memcpy(&unsafeModelPtr, &obj, sizeof(unsafeModelPtr));
auto it = std::lower_bound(m_selectionModels.begin(), m_selectionModels.end(), unsafeModelPtr);
if (it == m_selectionModels.end() || *it != unsafeModelPtr)
return;
m_selectionModels.erase(it);
it = std::lower_bound(m_currentSelectionModels.begin(), m_currentSelectionModels.end(), unsafeModelPtr);
if (it == m_currentSelectionModels.end() || *it != unsafeModelPtr)
return;
const auto row = std::distance(m_currentSelectionModels.begin(), it);
beginRemoveRows(QModelIndex(), row, row);
m_currentSelectionModels.erase(it);
endRemoveRows();
}
void SelectionModelModel::sourceModelChanged()
{
auto model = qobject_cast<QItemSelectionModel *>(sender());
Q_ASSERT(model);
auto it = std::lower_bound(m_currentSelectionModels.begin(), m_currentSelectionModels.end(), model);
if (it != m_currentSelectionModels.end() && *it == model && model->model() != m_model && m_model) {
const auto row = std::distance(m_currentSelectionModels.begin(), it);
beginRemoveRows(QModelIndex(), row, row);
m_currentSelectionModels.erase(it);
endRemoveRows();
}
if (model->model() == m_model && m_model) {
auto it = std::lower_bound(m_currentSelectionModels.begin(), m_currentSelectionModels.end(), model);
if (it != m_currentSelectionModels.end() && *it == model)
return;
const auto row = std::distance(m_currentSelectionModels.begin(), it);
beginInsertRows(QModelIndex(), row, row);
m_currentSelectionModels.insert(it, model);
endInsertRows();
}
}
void SelectionModelModel::selectionChanged()
{
auto model = qobject_cast<QItemSelectionModel *>(sender());
Q_ASSERT(model);
if (model->model() != m_model)
return;
const auto it = std::lower_bound(m_currentSelectionModels.constBegin(), m_currentSelectionModels.constEnd(), model);
Q_ASSERT(it != m_currentSelectionModels.constEnd() && *it == model);
const auto row = std::distance(m_currentSelectionModels.constBegin(), it);
emit dataChanged(index(row, 1), index(row, 3));
}
void SelectionModelModel::setModel(QAbstractItemModel *model)
{
if (model == m_model)
return;
if (!m_currentSelectionModels.isEmpty()) {
beginRemoveRows(QModelIndex(), 0, m_currentSelectionModels.size() - 1);
m_currentSelectionModels.clear();
endRemoveRows();
}
m_model = model;
QVector<QItemSelectionModel *> models;
std::copy_if(m_selectionModels.constBegin(), m_selectionModels.constEnd(), std::back_inserter(models), [this](QItemSelectionModel *model) {
return model->model() == m_model;
});
if (models.isEmpty())
return;
beginInsertRows(QModelIndex(), 0, models.size() - 1);
m_currentSelectionModels = std::move(models);
endInsertRows();
}
int SelectionModelModel::columnCount(const QModelIndex &parent) const
{
Q_UNUSED(parent);
return 5;
}
int SelectionModelModel::rowCount(const QModelIndex &parent) const
{
if (parent.isValid())
return 0;
return m_currentSelectionModels.size();
}
QVariant SelectionModelModel::data(const QModelIndex &index, int role) const
{
if (!index.isValid())
return QVariant();
auto model = m_currentSelectionModels.at(index.row());
if (role == Qt::DisplayRole) {
switch (index.column()) {
case 1:
return model->selectedIndexes().size();
case 2:
return model->selectedRows().size();
case 3:
return model->selectedColumns().size();
case 4:
return ObjectDataProvider::typeName(model);
}
}
return dataForObject(model, index, role);
}
QVariant SelectionModelModel::headerData(int section, Qt::Orientation orientation, int role) const
{
if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
switch (section) {
case 0:
return tr("Object");
case 1:
return tr("#Items");
case 2:
return tr("#Rows");
case 3:
return tr("#Columns");
case 4:
return tr("Type");
}
}
return QAbstractTableModel::headerData(section, orientation, role);
}
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