text: /*==============================================================================
  
    Program: 3D Slicer
  
    Copyright (c) Kitware Inc.
  
    See COPYRIGHT.txt
    or http://www.slicer.org/copyright/copyright.txt for details.
  
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
  
    This file was originally developed by Luis Ibanez, Kitware Inc.
    and was partially funded by NIH grant 3P41RR013218-12S1
  
  ==============================================================================*/
  
  // Qt includes
  #include <QApplication>
  #include <QTimer>
  #include <QTreeView>
  
  // Slicer includes
  #include "vtkSlicerConfigure.h"
  
  // qMRML includes
  #include "qMRMLSceneModel.h"
  #include "qMRMLSceneFactoryWidget.h"
  
  // CTK includes
  #include <ctkCoreTestingMacros.h>
  
  // MRML includes
  #include "vtkMRMLScene.h"
  
  // VTK includes
  #include "qMRMLWidget.h"
  
  // STD includes
  
  int qMRMLSceneModelTest1( int argc, char * argv [] )
  {
    qMRMLWidget::preInitializeApplication();
    QApplication app(argc, argv);
    qMRMLWidget::postInitializeApplication();
  
    qMRMLSceneModel   sceneModel;
    CHECK_INT(sceneModel.rowCount(), 0);
  
    qMRMLSceneFactoryWidget sceneFactory;
    sceneFactory.generateScene();
    sceneModel.setMRMLScene(sceneFactory.mrmlScene());
  
    // Check if root item is shown
    CHECK_INT(sceneModel.rowCount(), 1);
  
    sceneFactory.deleteScene();
    CHECK_INT(sceneModel.rowCount(), 0);
  
    sceneFactory.generateScene();
    CHECK_INT(sceneModel.rowCount(), 0);
  
    sceneModel.setMRMLScene(sceneFactory.mrmlScene());
    CHECK_INT(sceneModel.rowCount(), 1);
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
  
    // We add 10 nodes but some nodes (such as folder display node) may trigger creation of a subject
    // hierarchy node.
    CHECK_BOOL(sceneFactory.mrmlScene()->GetNumberOfNodes() >= 10, true);
    CHECK_INT(sceneModel.rowCount(sceneModel.mrmlSceneIndex()), sceneFactory.mrmlScene()->GetNumberOfNodes());
  
    QStringList postNodes;
    postNodes << QString("temporary item");
    sceneModel.setPostItems(postNodes, sceneModel.mrmlSceneItem());
    CHECK_INT(sceneModel.rowCount(sceneModel.mrmlSceneIndex()), sceneFactory.mrmlScene()->GetNumberOfNodes() + 1);
  
    // test if it can be replaced
    postNodes.clear();
    postNodes << "separator" << "post item 1" << "post item 2" << "post item 3";
    sceneModel.setPostItems(postNodes, sceneModel.mrmlSceneItem());
  
    QStringList preNodes;
    preNodes << "pre item 1" << "pre item 2"  << "separator";
    sceneModel.setPreItems(preNodes, sceneModel.mrmlSceneItem());
  
    QStringList postScene;
    postScene << "post scene item";
    sceneModel.setPostItems(postScene, nullptr);
  
    CHECK_INT(sceneModel.rowCount(sceneModel.mrmlSceneIndex()), sceneFactory.mrmlScene()->GetNumberOfNodes() + 7);
  
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    sceneFactory.generateNode();
    CHECK_BOOL(sceneFactory.mrmlScene()->GetNumberOfNodes() >= 13, true);
  
    CHECK_INT(sceneModel.rowCount(sceneModel.mrmlSceneIndex()), sceneFactory.mrmlScene()->GetNumberOfNodes() + 7);
  
    CHECK_INT(sceneModel.columnCount(), 1);
    CHECK_INT(sceneModel.columnCount(sceneModel.mrmlSceneIndex()), 1);
  
    QTreeView* view = new QTreeView(nullptr);
    view->setSelectionMode(QAbstractItemView::SingleSelection);
    view->setSelectionBehavior(QAbstractItemView::SelectRows);
    view->setDragDropMode(QAbstractItemView::InternalMove);
    view->setModel(&sceneModel);
    view->show();
  
    if (argc < 2 || QString(argv[1]) != "-I" )
      {
      QTimer::singleShot(200, &app, SLOT(quit()));
      }
  
    return app.exec();
  }
  