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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
#include "testmodel.h"
TreeItem::TreeItem(TreeItem *parent)
: m_parentItem(parent)
{}
TreeItem::TreeItem(int rootRow)
: m_parentItem(nullptr)
, rootRow(rootRow)
{}
TreeItem::~TreeItem()
{
qDeleteAll(m_childItems);
}
int TreeItem::row() const
{
if (!m_parentItem) {
Q_ASSERT(rootRow != -1);
return rootRow;
}
return m_parentItem->m_childItems.indexOf(const_cast<TreeItem *>(this));
}
TestModel::TestModel(QObject *parent)
: QAbstractItemModel(parent)
{
m_rootItems.append(new TreeItem(0));
m_rootItems.append(new TreeItem(1));
m_rootItems.append(new TreeItem(2));
for (int row = 0; row < m_rootItems.count(); ++row) {
const QString branchTag = QString::number(row);
for (int col = 0; col < m_columnCount; ++col)
m_rootItems[row]->m_entries << QVariant(QString("r:%1, c:%2, d:0, b:%3").arg(row).arg(col).arg(branchTag));
createTreeRecursive(m_rootItems[row], 4, 1, 5, branchTag);
}
}
void TestModel::createTreeRecursive(TreeItem *parentItem, int childCount, int currentDepth, int maxDepth, const QString &branchTag)
{
for (int row = 0; row < childCount; ++row) {
auto childItem = new TreeItem(parentItem);
if (currentDepth < maxDepth && row == 0)
createTreeRecursive(childItem, childCount, currentDepth + 1, maxDepth, branchTag);
for (int col = 0; col < m_columnCount; ++col)
childItem->m_entries << QVariant(QString("r:%1, c:%2, d:%3, b:%4").arg(row).arg(col).arg(currentDepth).arg(branchTag));
parentItem->m_childItems.append(childItem);
}
}
TreeItem *TestModel::treeItem(const QModelIndex &index) const
{
if (!index.isValid())
return nullptr;
return static_cast<TreeItem *>(index.internalPointer());
}
int TestModel::rowCount(const QModelIndex &parent) const
{
if (!parent.isValid())
return m_rootItems.count();
return treeItem(parent)->m_childItems.count();
}
int TestModel::columnCount(const QModelIndex &) const
{
return m_columnCount;
}
QVariant TestModel::data(const QModelIndex &index, int role) const
{
switch (role) {
case Qt::SizeHintRole:
return QSize(100, 20);
case Qt::DisplayRole: {
if (!index.isValid())
return QVariant("invalid index");
TreeItem *item = treeItem(index);
return item->m_entries.at(index.column());
break; }
default:
break;
}
return QVariant();
}
bool TestModel::setData(const QModelIndex &index, const QVariant &value, int role)
{
Q_UNUSED(role)
if (!index.isValid())
return false;
TreeItem *item = treeItem(index);
Q_ASSERT(item);
item->m_entries[index.column()] = value;
emit dataChanged(index, index);
return true;
}
QModelIndex TestModel::index(int row, int column, const QModelIndex &parent) const
{
if (!hasIndex(row, column, parent))
return QModelIndex();
if (!parent.isValid())
return createIndex(row, column, m_rootItems[row]);
return createIndex(row, column, treeItem(parent)->m_childItems.at(row));
}
QModelIndex TestModel::parent(const QModelIndex &index) const
{
if (!index.isValid())
return QModelIndex();
TreeItem *item = treeItem(index);
TreeItem *parentItem = item->m_parentItem;
if (!parentItem)
return QModelIndex();
return createIndex(parentItem->row(), 0, parentItem);
}
bool TestModel::insertRows(int position, int count, const QModelIndex &parent)
{
if (!parent.isValid()) {
qWarning() << "Cannot insert rows on an invalid parent!";
return false;
}
beginInsertRows(parent, position, position + count - 1);
TreeItem *parentItem = treeItem(parent);
for (int row = 0; row < count; ++row) {
auto newChildItem = new TreeItem(parentItem);
for (int col = 0; col < m_columnCount; ++col)
newChildItem->m_entries << QVariant(QString("(inserted at %1, %2)").arg(position + row).arg(col));
parentItem->m_childItems.insert(position + row, newChildItem);
}
endInsertRows();
return true;
}
bool TestModel::removeRows(int position, int count, const QModelIndex &parent)
{
if (!parent.isValid()) {
qWarning() << "Cannot remove rows on an invalid parent!";
return false;
}
beginRemoveRows(parent, position, position + count - 1);
TreeItem *parentItem = treeItem(parent);
parentItem->m_childItems.remove(position, count);
endRemoveRows();
return true;
}
Qt::ItemFlags TestModel::flags(const QModelIndex &index) const
{
Q_UNUSED(index)
return Qt::ItemIsSelectable | Qt::ItemIsEnabled | Qt::ItemIsEditable;
}
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