369 lines
11 KiB
C++
369 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2009 Stephen Kelly <steveire@gmail.com>
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the test suite of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:GPL-EXCEPT$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** GNU General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU
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** General Public License version 3 as published by the Free Software
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** Foundation with exceptions as appearing in the file LICENSE.GPL3-EXCEPT
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** included in the packaging of this file. Please review the following
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** information to ensure the GNU General Public License requirements will
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** be met: https://www.gnu.org/licenses/gpl-3.0.html.
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "dynamictreemodel.h"
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#include <QtCore/QHash>
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#include <QtCore/QList>
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#include <QtCore/QTimer>
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#include <QtCore/QDebug>
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DynamicTreeModel::DynamicTreeModel(QObject *parent) :
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QAbstractItemModel(parent),
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nextId(1)
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{
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}
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QModelIndex DynamicTreeModel::index(int row, int column, const QModelIndex &parent) const
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{
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// if (column != 0)
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// return QModelIndex();
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if (column < 0 || row < 0)
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return QModelIndex();
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QList<QList<qint64> > childIdColumns = m_childItems.value(parent.internalId());
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const qint64 grandParent = findParentId(parent.internalId());
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if (grandParent >= 0) {
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QList<QList<qint64> > parentTable = m_childItems.value(grandParent);
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if (parent.column() >= parentTable.size())
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qFatal("%s: parent.column() must be less than parentTable.size()", Q_FUNC_INFO);
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QList<qint64> parentSiblings = parentTable.at(parent.column());
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if (parent.row() >= parentSiblings.size())
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qFatal("%s: parent.row() must be less than parentSiblings.size()", Q_FUNC_INFO);
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}
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if (childIdColumns.size() == 0)
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return QModelIndex();
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if (column >= childIdColumns.size())
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return QModelIndex();
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QList<qint64> rowIds = childIdColumns.at(column);
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if (row >= rowIds.size())
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return QModelIndex();
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qint64 id = rowIds.at(row);
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return createIndex(row, column, reinterpret_cast<void *>(id));
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}
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qint64 DynamicTreeModel::findParentId(qint64 searchId) const
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{
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if (searchId <= 0)
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return -1;
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for (auto i = m_childItems.cbegin(), end = m_childItems.cend(); i != end; ++i) {
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for (const auto &list : i.value()) {
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if (list.contains(searchId))
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return i.key();
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}
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}
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return -1;
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}
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QModelIndex DynamicTreeModel::parent(const QModelIndex &index) const
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{
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if (!index.isValid())
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return QModelIndex();
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qint64 searchId = index.internalId();
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qint64 parentId = findParentId(searchId);
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// Will never happen for valid index, but what the hey...
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if (parentId <= 0)
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return QModelIndex();
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qint64 grandParentId = findParentId(parentId);
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if (grandParentId < 0)
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grandParentId = 0;
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int column = 0;
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QList<qint64> childList = m_childItems.value(grandParentId).at(column);
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int row = childList.indexOf(parentId);
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return createIndex(row, column, reinterpret_cast<void *>(parentId));
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}
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int DynamicTreeModel::rowCount(const QModelIndex &index) const
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{
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QList<QList<qint64> > cols = m_childItems.value(index.internalId());
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if (cols.size() == 0)
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return 0;
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if (index.column() > 0)
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return 0;
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return cols.at(0).size();
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}
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int DynamicTreeModel::columnCount(const QModelIndex &index) const
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{
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// Q_UNUSED(index);
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return m_childItems.value(index.internalId()).size();
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}
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QVariant DynamicTreeModel::data(const QModelIndex &index, int role) const
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{
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if (!index.isValid())
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return QVariant();
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if (Qt::DisplayRole == role)
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return m_items.value(index.internalId());
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return QVariant();
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}
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void DynamicTreeModel::clear()
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{
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beginResetModel();
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m_items.clear();
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m_childItems.clear();
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nextId = 1;
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endResetModel();
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}
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ModelChangeCommand::ModelChangeCommand(DynamicTreeModel *model, QObject *parent) :
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QObject(parent),
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m_model(model),
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m_numCols(1),
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m_startRow(-1),
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m_endRow(-1)
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{
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}
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QModelIndex ModelChangeCommand::findIndex(const QList<int> &rows) const
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{
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const int col = 0;
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QModelIndex parent = QModelIndex();
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for (int row : rows) {
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parent = m_model->index(row, col, parent);
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if (!parent.isValid())
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qFatal("%s: parent must be valid", Q_FUNC_INFO);
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}
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return parent;
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}
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ModelInsertCommand::ModelInsertCommand(DynamicTreeModel *model, QObject *parent) :
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ModelChangeCommand(model, parent)
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{
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}
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void ModelInsertCommand::doCommand()
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{
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QModelIndex parent = findIndex(m_rowNumbers);
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m_model->beginInsertRows(parent, m_startRow, m_endRow);
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qint64 parentId = parent.internalId();
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for (int row = m_startRow; row <= m_endRow; row++) {
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for (int col = 0; col < m_numCols; col++) {
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if (m_model->m_childItems[parentId].size() <= col)
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m_model->m_childItems[parentId].append(QList<qint64>());
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// QString name = QUuid::createUuid().toString();
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qint64 id = m_model->newId();
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QString name = QString::number(id);
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m_model->m_items.insert(id, name);
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m_model->m_childItems[parentId][col].insert(row, id);
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}
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}
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m_model->endInsertRows();
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}
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ModelMoveCommand::ModelMoveCommand(DynamicTreeModel *model, QObject *parent) :
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ModelChangeCommand(model, parent)
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{
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}
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bool ModelMoveCommand::emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd,
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const QModelIndex &destParent, int destRow)
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{
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return m_model->beginMoveRows(srcParent, srcStart, srcEnd, destParent, destRow);
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}
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void ModelMoveCommand::doCommand()
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{
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QModelIndex srcParent = findIndex(m_rowNumbers);
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QModelIndex destParent = findIndex(m_destRowNumbers);
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if (!emitPreSignal(srcParent, m_startRow, m_endRow, destParent, m_destRow))
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return;
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for (int column = 0; column < m_numCols; ++column) {
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QList<qint64> l = m_model->m_childItems.value(srcParent.internalId())[column].mid(
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m_startRow, m_endRow - m_startRow + 1);
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for (int i = m_startRow; i <= m_endRow; i++)
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m_model->m_childItems[srcParent.internalId()][column].removeAt(m_startRow);
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int d;
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if (m_destRow < m_startRow) {
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d = m_destRow;
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} else {
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if (srcParent == destParent)
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d = m_destRow - (m_endRow - m_startRow + 1);
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else
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d = m_destRow;
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}
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foreach (const qint64 id, l)
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m_model->m_childItems[destParent.internalId()][column].insert(d++, id);
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}
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emitPostSignal();
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}
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void ModelMoveCommand::emitPostSignal()
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{
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m_model->endMoveRows();
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}
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ModelResetCommand::ModelResetCommand(DynamicTreeModel *model, QObject *parent) :
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ModelMoveCommand(model, parent)
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{
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}
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ModelResetCommand::~ModelResetCommand()
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{
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}
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bool ModelResetCommand::emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd,
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const QModelIndex &destParent, int destRow)
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{
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Q_UNUSED(srcParent);
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Q_UNUSED(srcStart);
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Q_UNUSED(srcEnd);
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Q_UNUSED(destParent);
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Q_UNUSED(destRow);
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return true;
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}
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void ModelResetCommand::emitPostSignal()
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{
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m_model->beginResetModel();
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m_model->endResetModel();
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}
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ModelResetCommandFixed::ModelResetCommandFixed(DynamicTreeModel *model, QObject *parent) :
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ModelMoveCommand(model, parent)
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{
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}
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ModelResetCommandFixed::~ModelResetCommandFixed()
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{
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}
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bool ModelResetCommandFixed::emitPreSignal(const QModelIndex &srcParent, int srcStart, int srcEnd,
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const QModelIndex &destParent, int destRow)
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{
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Q_UNUSED(srcParent);
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Q_UNUSED(srcStart);
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Q_UNUSED(srcEnd);
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Q_UNUSED(destParent);
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Q_UNUSED(destRow);
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m_model->beginResetModel();
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return true;
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}
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void ModelResetCommandFixed::emitPostSignal()
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{
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m_model->endResetModel();
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}
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ModelChangeChildrenLayoutsCommand::ModelChangeChildrenLayoutsCommand(DynamicTreeModel *model,
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QObject *parent) :
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ModelChangeCommand(model, parent)
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{
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}
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void ModelChangeChildrenLayoutsCommand::doCommand()
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{
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const QPersistentModelIndex parent1 = findIndex(m_rowNumbers);
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const QPersistentModelIndex parent2 = findIndex(m_secondRowNumbers);
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QList<QPersistentModelIndex> parents;
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parents << parent1;
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parents << parent2;
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emit m_model->layoutAboutToBeChanged(parents);
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int rowSize1 = -1;
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int rowSize2 = -1;
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for (int column = 0; column < m_numCols; ++column) {
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{
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QList<qint64> &l = m_model->m_childItems[parent1.internalId()][column];
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rowSize1 = l.size();
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l.prepend(l.takeLast());
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}
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{
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QList<qint64> &l = m_model->m_childItems[parent2.internalId()][column];
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rowSize2 = l.size();
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l.append(l.takeFirst());
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}
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}
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// If we're changing one of the parent indexes, we need to ensure that we do that before
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// changing any children of that parent. The reason is that we're keeping parent1 and parent2
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// around as QPersistentModelIndex instances, and we query idx.parent() in the loop.
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QModelIndexList persistent = m_model->persistentIndexList();
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foreach (const QModelIndex &parent, parents) {
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int idx = persistent.indexOf(parent);
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if (idx != -1)
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persistent.move(idx, 0);
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}
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foreach (const QModelIndex &idx, persistent) {
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if (idx.parent() == parent1) {
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if (idx.row() == rowSize1 - 1) {
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m_model->changePersistentIndex(idx,
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m_model->createIndex(0, idx.column(),
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idx.internalPointer()));
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} else {
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m_model->changePersistentIndex(idx,
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m_model->createIndex(idx.row() + 1, idx.column(),
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idx.internalPointer()));
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}
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} else if (idx.parent() == parent2) {
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if (idx.row() == 0) {
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m_model->changePersistentIndex(idx,
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m_model->createIndex(rowSize2 - 1, idx.column(),
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idx.internalPointer()));
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} else {
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m_model->changePersistentIndex(idx,
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m_model->createIndex(idx.row() - 1, idx.column(),
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idx.internalPointer()));
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}
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}
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}
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emit m_model->layoutChanged(parents);
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}
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