Warning, file /libraries/kquickitemviews/tests/modelviewtester.cpp was not indexed or was modified since last indexation (in which case cross-reference links may be missing, inaccurate or erroneous).

 /***************************************************************************
  *   Copyright (C) 2017 by Emmanuel Lepage Vallee                          *
  *   Author : Emmanuel Lepage Vallee <emmanuel.lepage@kde.org>             *
  *                                                                         *
  *   This program is free software; you can redistribute it and/or modify  *
  *   it under the terms of the GNU General Public License as published by  *
  *   the Free Software Foundation; either version 3 of the License, or     *
  *   (at your option) any later version.                                   *
  *                                                                         *
  *   This program is distributed in the hope that it will be useful,       *
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  *   GNU General Public License for more details.                          *
  *                                                                         *
  *   You should have received a copy of the GNU General Public License     *
  *   along with this program.  If not, see <http://www.gnu.org/licenses/>. *
  **************************************************************************/
 #include "modelviewtester.h"
 
 #include <QtCore/QDebug>
 #include <QMetaObject>
 #include <QMetaMethod>
 
 #include <functional>
 
 #define DO(slot) steps << QString(#slot) ;
 
 struct ModelViewTesterItem
 {
     ModelViewTesterItem() {}
     ModelViewTesterItem(ModelViewTesterItem* p, const QHash<int, QVariant>& vals, int i = -1);
 
     int m_Index {0};;
     ModelViewTesterItem* m_pParent {nullptr};
     QHash<int, QVariant> m_hValues;
     QVector<ModelViewTesterItem*> m_lChildren;
 };
 
 ModelViewTester::ModelViewTester(QObject* parent) : QAbstractItemModel(parent)
 {
     m_pRoot = new ModelViewTesterItem;
 
     // Append
     DO(appendSimpleRoot);
     DO(appendSimpleRoot);
     DO(appendSimpleRoot);
     DO(appendSimpleRoot);
     DO(appendSimpleRoot);
 
     DO(appendRootChildren);
     DO(appendRootChildren);
     DO(appendRootChildren);
     DO(appendRootChildren);
 
     // Prepend
     DO(prependSimpleRoot);
 
     // Move
     DO(moveRootToFront);
     DO(moveChildByOne);
     DO(moveChildByParent);
     DO(moveToGrandChildren);
     //TODO moveFirst
     //TODO moveLast
 
     // Insert
     DO(insertRoot);
     DO(insertFirst);
     DO(insertChild);
 
     // Remove
     DO(removeRoot);
     //TODO removeMiddle
     //TODO removeLastChild
     //TODO removeWithChildren
     DO(resetModel);
 
     // Larger tree
     DO(largeFrontTree);
     DO(removeLargeTree);
     DO(removeLargeTree2);
     DO(largeFrontTree2);
     DO(removeLargeTree2);
     DO(removeLargeTree3);
     //TODO move multiple
 
     // Larger move (with out of view)
 
 }
 
 ModelViewTester::~ModelViewTester()
 {
 
 }
 
 void ModelViewTester::run() {
     m_pTimer->setInterval(100);
 
     QObject::connect(m_pTimer, &QTimer::timeout, this, [this]() {
         int methodIndex = metaObject()->indexOfMethod((steps[count]+"()").toLatin1());
         metaObject()->method(methodIndex).invoke(this, Qt::QueuedConnection);
         count++;
         if (count == steps.size()) {
             m_pTimer->stop();
             count = 0;
         }
     });
 
     m_pTimer->start();
 }
 
 bool ModelViewTester::setData( const QModelIndex& index, const QVariant &value, int role   )
 {
     Q_UNUSED(index)
     Q_UNUSED(value)
     Q_UNUSED(role)
     return false;
 }
 
 QVariant ModelViewTester::data( const QModelIndex& index, int role ) const
 {
     if (!index.isValid())
         return {};
 
     auto item = static_cast<ModelViewTesterItem*>(index.internalPointer());
 
     return item->m_hValues[role];
 }
 
 int ModelViewTester::rowCount( const QModelIndex& parent) const
 {
     if (!parent.isValid())
         return m_pRoot->m_lChildren.size();
 
     auto item = static_cast<ModelViewTesterItem*>(parent.internalPointer());
 
     return item->m_lChildren.size();
 }
 
 int ModelViewTester::columnCount( const QModelIndex& parent ) const
 {
     return parent.isValid() ? 0 : 1; //FIXME not really true
 }
 
 QModelIndex ModelViewTester::parent( const QModelIndex& index ) const
 {
     if (!index.isValid())
         return {};
 
     auto item = static_cast<ModelViewTesterItem*>(index.internalPointer());
 
     Q_ASSERT(item != m_pRoot);
 
     if (item->m_pParent == m_pRoot)
         return {};
 
     return createIndex(item->m_pParent->m_Index, 0, item->m_pParent);
 }
 
 QModelIndex ModelViewTester::index( int row, int column, const QModelIndex& parent ) const
 {
     auto parItem = parent.isValid() ?
         static_cast<ModelViewTesterItem*>(parent.internalPointer()): m_pRoot;
 
     if (column || row >= parItem->m_lChildren.size() || row < 0)
         return {};
 
     return createIndex(row, column, parItem->m_lChildren[row]);
 }
 
 QMimeData* ModelViewTester::mimeData( const QModelIndexList &indexes) const
 {
     Q_UNUSED(indexes)
     return nullptr; //TODO
 }
 
 bool ModelViewTester::dropMimeData( const QMimeData* data, Qt::DropAction action, int row, int column, const QModelIndex& parent)
 {
     Q_UNUSED(data)
     Q_UNUSED(action)
     Q_UNUSED(row)
     Q_UNUSED(column)
     Q_UNUSED(parent)
     return false; //TODO
 }
 
 QHash<int,QByteArray> ModelViewTester::roleNames() const
 {
     return {
         {Qt::DisplayRole, "display"},
         {Qt::UserRole, "offset"}
     };
 }
 
 // Qt::ItemFlags ModelViewTester::flags( const QModelIndex& index) const
 
 ModelViewTesterItem::ModelViewTesterItem(ModelViewTesterItem* p, const QHash<int, QVariant>& vals, int i) :
     m_pParent(p), m_hValues(vals)
 {
     if (i == -1) {
         m_Index = p->m_lChildren.size();
         p->m_lChildren << this;
     }
     else {
         m_Index = i;
 
         p->m_lChildren.insert(i, this);
         for (int j=i+1; j < p->m_lChildren.size(); j++)
             p->m_lChildren[j]->m_Index++;
     }
 }
 
 void ModelViewTester::prependSimpleRoot()
 {
     beginInsertRows({}, 0, 0);
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "prep root 1"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals, 0);
 
     endInsertRows();
     beginInsertRows({}, 1, 1);
 
     vals = {
         {Qt::DisplayRole, "prep root 2"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals, 1);
 
     endInsertRows();
     beginInsertRows({}, 0, 0);
 
     vals = {
         {Qt::DisplayRole, "prep root 0"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals, 0);
 
     endInsertRows();
 }
 
 void ModelViewTester::appendSimpleRoot()
 {
     beginInsertRows({}, m_pRoot->m_lChildren.size(), m_pRoot->m_lChildren.size());
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "root "+QString::number(m_pRoot->m_lChildren.size())},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals);
 
     endInsertRows();
 }
 
 void ModelViewTester::appendRootChildren()
 {
     auto par = m_pRoot->m_lChildren[1];
     beginInsertRows(index(1,0), par->m_lChildren.size(), par->m_lChildren.size());
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "child "+QString::number(par->m_lChildren.size())},
         {Qt::UserRole, 10}
     };
 
     new ModelViewTesterItem(par, vals);
 
     endInsertRows();
 }
 
 void ModelViewTester::moveRootToFront()
 {
     beginMoveRows({}, 2,2, {}, 0);
 
     auto elem = m_pRoot->m_lChildren[2];
 
     m_pRoot->m_lChildren.remove(2);
     m_pRoot->m_lChildren.insert(0, elem);
 
     for (int i =0; i < m_pRoot->m_lChildren.size(); i++)
         m_pRoot->m_lChildren[i]->m_Index = i;
 
     endMoveRows();
 }
 
 void ModelViewTester::moveChildByOne()
 {
     auto parentIdx = index(4,0);
 
     beginMoveRows(parentIdx, 2,2, parentIdx, 1);
 
     auto elem = m_pRoot->m_lChildren[4]->m_lChildren[2];
 
     m_pRoot->m_lChildren[4]->m_lChildren.remove(2);
     m_pRoot->m_lChildren[4]->m_lChildren.insert(0, elem);
 
     for (int i =0; i < m_pRoot->m_lChildren[4]->m_lChildren.size(); i++)
         m_pRoot->m_lChildren[4]->m_lChildren[i]->m_Index = i;
 
     endMoveRows();
 }
 
 void ModelViewTester::moveChildByParent()
 {
     auto elem = m_pRoot->m_lChildren[4]->m_lChildren[3];
 
     auto oldParentIdx = index(4,0);
     auto newParentIdx = index(m_pRoot->m_lChildren.size()-1,0);
 
     beginMoveRows(oldParentIdx, 3,3, newParentIdx, 0);
 
     m_pRoot->m_lChildren[4]->m_lChildren.remove(3);
     m_pRoot->m_lChildren[m_pRoot->m_lChildren.size()-1]->m_lChildren.insert(0, elem);
 
     elem->m_Index = 0;
     endMoveRows();
 }
 
 void ModelViewTester::moveToGrandChildren()
 {
     auto elem1 = m_pRoot->m_lChildren[1];
     auto elem2 = m_pRoot->m_lChildren[2];
     auto newPar = m_pRoot->m_lChildren[4]->m_lChildren[2];
     auto newParentIdx = createIndex(newPar->m_Index, 0, newPar);
 
     beginMoveRows({}, 1,2, newParentIdx, 0);
 
     elem1->m_pParent = newPar;
     elem2->m_pParent = newPar;
 
     elem1->m_hValues = {
         {Qt::DisplayRole, elem1->m_hValues[0].toString()+" gc"},
         {Qt::UserRole, 20}
     };
     elem2->m_hValues = {
         {Qt::DisplayRole, elem2->m_hValues[0].toString()+" gc"},
         {Qt::UserRole, 20}
     };
 
     m_pRoot->m_lChildren.remove(1);
     m_pRoot->m_lChildren.remove(1);
 
     newPar->m_lChildren << elem1 << elem2;
 
     for (int i =0; i < newPar->m_lChildren.size(); i++)
         newPar->m_lChildren[i]->m_Index = i;
 
     for (int i =0; i < m_pRoot->m_lChildren.size(); i++)
         m_pRoot->m_lChildren[i]->m_Index = i;
 
     endMoveRows();
 
     Q_EMIT dataChanged(index(0, 0, newParentIdx), index(1, 0, newParentIdx));
 }
 
 
 void ModelViewTester::insertRoot()
 {
     beginInsertRows({}, 1, 1);
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "inserted root 1"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals, 1);
 
     endInsertRows();
 }
 
 void ModelViewTester::insertFirst()
 {
     beginInsertRows({}, 0, 0);
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "inserted root 0"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(m_pRoot, vals, 0);
 
     endInsertRows();
 }
 
 void ModelViewTester::insertChild()
 {
     auto newPar = m_pRoot->m_lChildren[4];
     auto parIdx = createIndex(4, 0, newPar);
 
     Q_ASSERT(parIdx.isValid());
 
     beginInsertRows(parIdx, 0, 0);
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "inserted child 0"},
         {Qt::UserRole, 0}
     };
 
     new ModelViewTesterItem(newPar, vals, 0);
 
     endInsertRows();
 }
 
 void ModelViewTester::removeRoot()
 {
     beginRemoveRows({}, 0, 0);
 
     QHash<int, QVariant> vals = {
         {Qt::DisplayRole, "inserted root 0"},
         {Qt::UserRole, 0}
     };
 
     m_pRoot->m_lChildren.remove(1);
 
     for (int i =0; i < m_pRoot->m_lChildren.size(); i++)
         m_pRoot->m_lChildren[i]->m_Index = i;
 
     endRemoveRows();
 }
 
 void ModelViewTester::resetModel()
 {
     beginResetModel();
     qDeleteAll(m_pRoot->m_lChildren);
     m_pRoot->m_lChildren.clear();
     endResetModel();
 }
 
 void ModelViewTester::largeFrontTree()
 {
     for (int i = 0; i < 100; i++) {
         beginInsertRows({}, 0, 0);
 
         QHash<int, QVariant> vals = {
             {Qt::DisplayRole, "inserted root 1"},
             {Qt::UserRole, 0}
         };
 
         auto itm = new ModelViewTesterItem(m_pRoot, vals, 0);
 
         endInsertRows();
 
         auto p = createIndex(0, 0, itm);
 
         beginInsertRows(p, 0, 4);
         for (int j = 0; j < 5; j++) {
             QHash<int, QVariant> vals2 = {
                 {Qt::DisplayRole, "children "+QString::number(j)},
                 {Qt::UserRole, 0}
             };
 
             new ModelViewTesterItem(itm, vals2, 0);
         }
         endInsertRows();
     }
 }
 
 // Test removing elements when some are out of view
 void ModelViewTester::removeLargeTree()
 {
     for (int i = 0; i < 100; i++) {
         auto parent = m_pRoot->m_lChildren[i];
         auto idx = createIndex(i, 0, parent);
 
         beginRemoveRows(idx, 3, 3);
         delete parent->m_lChildren[3];
         parent->m_lChildren.remove(3);
         endRemoveRows();
     }
 }
 
 // Test removing multiple item at once with out-of-view
 void ModelViewTester::removeLargeTree2()
 {
     for (int i = 0; i < 100; i++) {
         auto parent = m_pRoot->m_lChildren[i];
         const int s =  parent->m_lChildren.size();
         auto idx = createIndex(i, 0, parent);
 
         beginRemoveRows(idx, 0, s);
         for (int j = 0; j < s; j++)
             delete parent->m_lChildren[j];
         parent->m_lChildren.clear();
         endRemoveRows();
     }
 }
 
 // Test removing out-of-view item until the viewport is empty
 void ModelViewTester::removeLargeTree3()
 {
     while (m_pRoot->m_lChildren.size()) {
         const int pos = m_pRoot->m_lChildren.size()/2;
         beginRemoveRows({}, pos, pos);
         delete m_pRoot->m_lChildren[pos];
         m_pRoot->m_lChildren.remove(pos);
         endRemoveRows();
     }
 }
 
 // Insert more items that can fit in the view
 void ModelViewTester::largeFrontTree2()
 {
     for (int i = 0; i < 100; i++) {
         auto parent = m_pRoot->m_lChildren[i];
         auto idx = createIndex(i, 0, parent);
 
         beginInsertRows(idx, 0, 19);
         for (int j = 0; j < 20; j++) {
             QHash<int, QVariant> vals = {
                 {Qt::DisplayRole, "children v2 "+QString::number(j)},
                 {Qt::UserRole, 0}
             };
 
             new ModelViewTesterItem(parent, vals, 0);
         }
         endInsertRows();
     }
 }