qt5base-lts/tests/auto/other/qabstractitemmodelutils/dynamictreemodel.cpp

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