TreeModel.cc

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#include "TreeModel.hh"
 
  #include <QtWidgets>
 
 
#include <OpenFlipper/BasePlugin/PluginFunctions.hh>
#include <OpenFlipper/common/GlobalOptions.hh>
 
#include <ObjectTypes/Light/LightWidget.hh>
 
 
//******************************************************************************
 
TreeModel::TreeModel( QObject *_parent) : QAbstractItemModel(_parent)
{
  rootItem_ = new TreeItem( -1, "ROOT", DATA_UNKNOWN, 0);
}
 
 
//******************************************************************************
 
TreeModel::~TreeModel()
{
 
}
 
 
//******************************************************************************
 
int TreeModel::columnCount(const QModelIndex &/*_parent*/) const
{
  // Name,Visible,Source,Target -> 4
  return (4);
}
 
 
//******************************************************************************
 
QVariant TreeModel::data(const QModelIndex &_index, int _role) const
{
 
  // Skip invalid requests
  if (!_index.isValid())
      return QVariant();
 
  // Get the corresponding tree item
  TreeItem *item = static_cast<TreeItem*>(_index.internalPointer());
 
  if ( item == rootItem_ ) {
    std::cerr << "Root" << std::endl;
  }
 
  // Set the background color of the objects row
  if ( _role == Qt::BackgroundRole ) {
    if ( !item->visible() ) {
      return QVariant( QBrush(QColor(100,100,100) ) );
    }
  }
  
 
 
  switch (_index.column() ) {
  // Name
  case 0 :
 
    // If we are setting the name, also add the icon
    if ( _role == Qt::DecorationRole ) {
      if (item->dataType() == DATA_LIGHT)
      {
        LightObject* light = 0;
        if (item->id() != -1 && PluginFunctions::getObject( item->id(), light ) ) {
          if (light != 0 && !light->lightSource()->enabled())
            return QVariant (QIcon (OpenFlipper::Options::iconDirStr()+OpenFlipper::Options::dirSeparator()+"LightOff.png"));
        }
      }
      return QVariant( typeIcon(item->dataType()) );
    }
 
    if (_role != Qt::DisplayRole && _role != Qt::EditRole )
      return QVariant();
 
    return QVariant(item->name());
 
    break;
    // Visible
  case 1 :
    if (_role == Qt::CheckStateRole ) {
      bool visible = false;
      // target group
      if (item->isGroup() && item->childCount() > 0)
      {
        QList< TreeItem* > children = item->getLeafs();
 
        visible = children[0]->visible();
        for (int i=0; i < children.size() ; ++i)
        {
          if (visible != children[i]->visible())
            return QVariant(Qt::PartiallyChecked);
        }
      }
      else
        visible = item->visible();
      return (visible) ? QVariant(Qt::Checked) : QVariant(Qt::Unchecked);
    }
    return QVariant();
    // Source
  case 2 :
    if (_role == Qt::CheckStateRole ) {
      bool source = false;
      // target group
      if (item->isGroup() && item->childCount() > 0)
      {
        QList< TreeItem* > children = item->getLeafs();
 
        source = children[0]->source();
        for (int i=0; i < children.size() ; ++i)
        {
          if (source != children[i]->source())
            return QVariant(Qt::PartiallyChecked);
        }
      }
      else
        source = item->source();
      return (source) ? QVariant(Qt::Checked) : QVariant(Qt::Unchecked);
    }
    return QVariant();
 
    // Target
  case 3 :
    if (_role == Qt::CheckStateRole ) {
      bool target = false;
      // target group
      if (item->isGroup() && item->childCount() > 0)
      {
        QList< TreeItem* > children = item->getLeafs();
 
        target = children[0]->target();
        for (int i=0; i < children.size() ; ++i)
        {
          if (target != children[i]->target())
            return QVariant(Qt::PartiallyChecked);
        }
      }
      else
        target = item->target();
      return (target) ? QVariant(Qt::Checked) : QVariant(Qt::Unchecked);
    }
    return QVariant();
 
  default:
    return QVariant();
  }
  return QVariant();
 
}
 
 
//******************************************************************************
 
Qt::ItemFlags TreeModel::flags(const QModelIndex &_index) const
{
 
#if QT_VERSION < QT_VERSION_CHECK(5, 15, 0)
    if (!_index.isValid())
        return 0;
 
    Qt::ItemFlags flags = 0;
#else
    if (!_index.isValid())
        return Qt::ItemFlags();
 
    Qt::ItemFlags flags = Qt::ItemFlags();
#endif
 
 
    // Show/Source/Target
    if ( ( _index.column() == 1 ) ||
         ( _index.column() == 2 ) ||
         ( _index.column() == 3 ) )
      flags = Qt::ItemIsUserCheckable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
    else
    if ( _index.column() == 0 )
      flags = Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
    else
      flags = Qt::ItemIsEnabled;
 
  // Get the corresponding tree item
  TreeItem *item = static_cast<TreeItem*>(_index.internalPointer());
 
  if ( item->isGroup() )
    return flags | Qt::ItemIsDragEnabled | Qt::ItemIsDropEnabled;
  else
    return flags | Qt::ItemIsDragEnabled;
}
 
 
//******************************************************************************
 
QVariant TreeModel::headerData(int _section, Qt::Orientation _orientation,
                                int _role) const
{
    if (_orientation == Qt::Horizontal && _role == Qt::DisplayRole) {
 
      switch (_section) {
        case 0 : return QVariant("Name");
        case 1 : return QVariant("Show");
        case 2 : return QVariant("Source");
        case 3 : return QVariant("Target");
        default :
          return QVariant();
      }
    }
    return QVariant();
}
 
 
//******************************************************************************
 
QModelIndex TreeModel::index(int _row, int _column,const QModelIndex &_parent) const
{
//     if (!hasIndex(row, column, _parent))
//         return QModelIndex();
 
    TreeItem *parentItem;
 
    if (!_parent.isValid())
        parentItem = rootItem_;
    else
        parentItem = static_cast<TreeItem*>(_parent.internalPointer());
 
    TreeItem *childItem = parentItem->child(_row);
    if (childItem)
        return createIndex(_row, _column, childItem);
    else
        return QModelIndex();
}
 
 
//******************************************************************************
 
QModelIndex TreeModel::parent(const QModelIndex &_index) const
{
    if (!_index.isValid())
        return QModelIndex();
 
    TreeItem *childItem = static_cast<TreeItem*>(_index.internalPointer());
    TreeItem *parentItem = childItem->parent();
 
    if (parentItem == rootItem_)
        return QModelIndex();
 
    return createIndex(parentItem->row(), 0, parentItem);
}
 
 
//******************************************************************************
 
int TreeModel::rowCount(const QModelIndex &_parent) const
{
    TreeItem *parentItem;
    if (_parent.column() > 0)
        return 0;
 
    if (!_parent.isValid())
        parentItem = rootItem_;
    else
        parentItem = static_cast<TreeItem*>(_parent.internalPointer());
 
    return parentItem->childCount();
}
//******************************************************************************
 
void TreeModel::objectChanged(int _id) {
 
  if ( _id != -1 ){
 
    BaseObject* obj = 0;
    PluginFunctions::getObject(_id, obj);
 
    TreeItem* item = rootItem_->childExists(_id);
 
    //if internal and external representation are both valid
    if (obj != 0 && item != 0){
      //update the name
      bool updateRow = false;
      if ( obj->name() != item->name() ){
 
        item->name( obj->name() );
        updateRow = true;
      }
 
      //update visibility
      if ( obj->visible() != item->visible() ){
 
        item->visible( obj->visible() );
        updateRow = true;
      }
 
      //update source flag
      if ( obj->source() != item->source() ){
 
        item->source( obj->source() );
        updateRow = true;
      }
 
      //update target flag
      if ( obj->target() != item->target() ){
 
        item->target( obj->target() );
        updateRow = true;
      }
      if (updateRow)
      {
        //TODO actually we do not need to update the whole row but single column somehow doesn't work
        QModelIndex index0 = getModelIndex(item,0);
        QModelIndex index1 = getModelIndex(item,3);
 
        if ( index0.isValid() && index1.isValid() ){
          //the whole row has to be updated because of the grey background-color
          emit dataChanged( index0, index1);
        }
      }
 
      //update parent
      if ( obj->parent() == PluginFunctions::objectRoot() && isRoot( item->parent() ) ){
        return;
      }else if ( obj->parent() == PluginFunctions::objectRoot() && !isRoot( item->parent() ) ){
        moveItem(item, rootItem_ );
      }else if ( obj->parent()->id() != item->parent()->id() ){
        TreeItem* parent = rootItem_->childExists( obj->parent()->id() );
 
        if (parent != 0)
          moveItem(item, parent );
      }
 
    }
  }
 
}
 
 
void TreeModel::objectAdded(BaseObject* _object){
 
  // check if item already in model tree
  // this function can be called by addEmpty and fileOpened
  // both will be called by fileOpened such that the item
  // already exists
  if( rootItem_->childExists( _object->id() )) 
    return;
 
  TreeItem* parent = 0;
  //find the parent
  if ( _object->parent() == PluginFunctions::objectRoot() )
    parent = rootItem_;
  else
    parent = rootItem_->childExists( _object->parent()->id() );
 
  if (parent != 0){
    QModelIndex parentIndex = getModelIndex(parent, 0);
 
    beginInsertRows(parentIndex, parent->childCount(), parent->childCount()); //insert at the bottom
 
    TreeItem* item = new TreeItem( _object->id(), _object->name(), _object->dataType(), parent);
 
    parent->appendChild( item );
 
    endInsertRows();
  }
 
  objectChanged( _object->id() );
}
 
void TreeModel::objectDeleted(int _id){
 
  TreeItem* item = rootItem_->childExists(_id);
 
  if ( item != 0 && !isRoot(item) ){
 
    QModelIndex itemIndex   = getModelIndex(item, 0);
    QModelIndex parentIndex = itemIndex.parent();
 
    beginRemoveRows( parentIndex, itemIndex.row(), itemIndex.row() );
 
    item->parent()->removeChild(item);
    item->deleteSubtree();
 
    delete item;
 
    endRemoveRows();
  }
}
 
//******************************************************************************
 
void TreeModel::moveItem(TreeItem* _item, TreeItem* _parent ){
 
  QModelIndex itemIndex   = getModelIndex(_item, 0);
  QModelIndex oldParentIndex = itemIndex.parent();
  QModelIndex newParentIndex = getModelIndex(_parent, 0);
 
  beginMoveRows ( oldParentIndex, itemIndex.row(), itemIndex.row(), newParentIndex,0 );
    _item->parent()->removeChild(_item);
    _item->setParent( _parent );
    _parent->appendChild( _item );
  endMoveRows();
}
 
//******************************************************************************
 
TreeItem* TreeModel::getItem(const QModelIndex &_index) const
{
    if (_index.isValid()) {
        TreeItem *item = static_cast<TreeItem*>(_index.internalPointer());
        if (item) return item;
    }
    return rootItem_;
}
 
 
//******************************************************************************
 
QString TreeModel::itemName(const QModelIndex &_index) const
{
    if (_index.isValid()) {
        TreeItem *item = static_cast<TreeItem*>(_index.internalPointer());
        if (item)
          return item->name();
    }
    return "not found";
}
 
//******************************************************************************
 
int TreeModel::itemId(const QModelIndex &_index) const
{
    if (_index.isValid()) {
        TreeItem *item = static_cast<TreeItem*>(_index.internalPointer());
        if (item)
          return item->id();
    }
    return -1;
}
 
//******************************************************************************
 
QModelIndex TreeModel::getModelIndex(TreeItem* _object, int _column ){
 
  // root item gets an invalid QModelIndex
  if ( _object == rootItem_ )
    return QModelIndex();
 
  QModelIndex index = createIndex(_object->row(), _column, _object);
 
  return index;
}
 
//******************************************************************************
 
bool TreeModel::setData(const QModelIndex &_index, const QVariant &_value, int /*role*/)
{
 
  emit dataChangedInside( itemId(_index), _index.column(), _value );
 
  
  return true;
}
 
 
//******************************************************************************
 
bool TreeModel::isRoot(TreeItem * _item) {
  return ( _item == rootItem_ );
}
 
/*******************************************************************************
        drag & drop stuff
 *******************************************************************************/
 
Qt::DropActions TreeModel::supportedDropActions() const
{
    return /*Qt::CopyAction |*/ Qt::MoveAction;
}
 
 
//******************************************************************************
 
QStringList TreeModel::mimeTypes() const
{
    QStringList types;
    types << "DataControl/dragDrop";
    return types;
}
 
 
//******************************************************************************
 
QMimeData* TreeModel::mimeData(const QModelIndexList& _indexes) const
{
    QMimeData *mimeData = new QMimeData();
    QByteArray encodedData;
 
    QDataStream stream(&encodedData, QIODevice::WriteOnly);
 
    QVector< int > rows;
 
    foreach (QModelIndex index, _indexes) {
        if (index.isValid()) {
 
          if (!rows.contains( index.row() ) ){
            TreeItem *item = getItem(index);
            stream << item->id();
 
            rows.push_back( index.row() );
          }
        }
    }
 
    mimeData->setData("DataControl/dragDrop", encodedData);
    return mimeData;
}
 
 
//******************************************************************************
 
bool TreeModel::dropMimeData( const QMimeData *_data,
                              Qt::DropAction _action,
                              int /*_row*/,
                              int /*_column*/,
                              const QModelIndex &_parent)
{
  if (_action == Qt::IgnoreAction)
      return true;
 
  if (!_data->hasFormat("DataControl/dragDrop"))
      return false;
 
  QByteArray encodedData = _data->data("DataControl/dragDrop");
  QDataStream stream(&encodedData, QIODevice::ReadOnly);
 
  QVector< int > ids;
 
  while (!stream.atEnd()) {
    int id;
    stream >> id;
 
    ids.push_back( id );
  }
 
  if (ids.count() == 0)
    return false;
 
  //get new parent
  TreeItem *newParent = getItem(_parent);
 
  if ( newParent == 0 || !newParent->isGroup() )
    return false;
 
  //and move all objects
  for (int i = 0; i < ids.count(); i++){
    //tell the DataControlPlugin to move the corresponding BaseObject
    emit moveBaseObject( ids[i], newParent->id()  );
  }
 
  return true;
 
 }
//******************************************************************************
TreeItem *TreeModel::getItem(const int _id) const
{
  return rootItem_->childExists(_id);
}