TreeModelObjectSelection.cc

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#include <OpenFlipper/common/Types.hh>
 
 
#include <QtWidgets>
 
 
#include "TreeModelObjectSelection.hh"
 
 
#include "../OpenFlipper/BasePlugin/PluginFunctions.hh"
 
 
//******************************************************************************
 
TreeModelObjectSelection::TreeModelObjectSelection( QObject *_parent) : QAbstractItemModel(_parent)
{
  rootItem_ = new TreeItemObjectSelection( -1, "ROOT", DATA_UNKNOWN, 0);
}
 
 
//******************************************************************************
 
TreeModelObjectSelection::~TreeModelObjectSelection()
{
 
}
 
 
//******************************************************************************
 
 
int TreeModelObjectSelection::columnCount(const QModelIndex &/*_parent*/) const
{
  // Id, Name -> 2
  return (2);
}
 
 
//******************************************************************************
 
QVariant TreeModelObjectSelection::data(const QModelIndex &index, int role) const
{
 
  // Skip invalid requests
  if (!index.isValid())
      return QVariant();
 
  // Get the corresponding tree item
  TreeItemObjectSelection *item = static_cast<TreeItemObjectSelection*>(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 (192, 192, 192)));
    }
  }
 
  if (role == Qt::DisplayRole)
  {
    switch (index.column ())
    {
      case 0:
        return QVariant(item->id());
      case 1:
        return QVariant(item->name());
      default:
        return QVariant ();
    }
  }
  else
    return QVariant ();
}
 
 
//******************************************************************************
 
Qt::ItemFlags TreeModelObjectSelection::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() == 0 || index.column() == 1 )
    flags = Qt::ItemIsEnabled | Qt::ItemIsSelectable;
  else
    flags = Qt::ItemIsEnabled;
 
  return flags;
}
 
 
//******************************************************************************
 
QVariant TreeModelObjectSelection::headerData(int section, Qt::Orientation orientation,
                                int role) const
{
  if (orientation == Qt::Horizontal && role == Qt::DisplayRole) {
 
    if (section == 0)
      return QVariant("ID");
    else if (section == 1)
      return QVariant("Name");
    else
      return QVariant();
 
  }
  return QVariant();
}
 
 
//******************************************************************************
 
QModelIndex TreeModelObjectSelection::index(int row, int column, const QModelIndex &_parent) const
{
  TreeItemObjectSelection *parentItem;
 
  if (!_parent.isValid())
    parentItem = rootItem_;
  else
    parentItem = static_cast<TreeItemObjectSelection*>(_parent.internalPointer());
 
  TreeItemObjectSelection *childItem = parentItem->child(row);
  if (childItem)
    return createIndex(row, column, childItem);
  else
    return QModelIndex();
}
 
 
//******************************************************************************
 
QModelIndex TreeModelObjectSelection::parent(const QModelIndex &index) const
{
  if (!index.isValid())
    return QModelIndex();
 
  TreeItemObjectSelection *childItem = static_cast<TreeItemObjectSelection*>(index.internalPointer());
  TreeItemObjectSelection *parentItem = childItem->parent();
 
  if (parentItem == rootItem_)
    return QModelIndex();
 
  return createIndex(parentItem->row(), 0, parentItem);
}
 
 
//******************************************************************************
 
int TreeModelObjectSelection::rowCount(const QModelIndex &_parent) const
{
  TreeItemObjectSelection *parentItem;
  if (_parent.column() > 0)
    return 0;
 
  if (!_parent.isValid())
    parentItem = rootItem_;
  else
    parentItem = static_cast<TreeItemObjectSelection*>(_parent.internalPointer());
 
  return parentItem->childCount();
}
 
 
//******************************************************************************
 
void TreeModelObjectSelection::objectChanged(int _id) {
 
  if ( _id != -1 ){
 
    BaseObject* obj = 0;
    PluginFunctions::getObject(_id, obj);
 
    TreeItemObjectSelection* item = rootItem_->childExists(_id);
 
    //if internal and external representation are both valid
    if (obj != 0 && item != 0){
      //update the name
      if ( obj->name() != item->name() ){
 
        item->name( obj->name() );
 
        QModelIndex index = getModelIndex(item,0);
        if ( index.isValid() )
          emit dataChanged( index, index);
      }
 
      //update visibility
      if ( obj->visible() != item->visible() || obj->isGroup() ){
 
        item->visible( obj->visible() );
 
        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);
          propagateUpwards(item->parent(), 1, obj->visible() );
        }
 
        if ( obj->isGroup() )
          propagateDownwards(item, 1 );
      }
 
      //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() ){
        TreeItemObjectSelection* parent = rootItem_->childExists( obj->parent()->id() );
 
        if (parent != 0)
          moveItem(item, parent );
      }
    }
  }
}
 
 
void TreeModelObjectSelection::objectAdded(BaseObject* _object){
 
  objectAdded (_object, _object->parent());
}
 
void TreeModelObjectSelection::objectAdded(BaseObject* _object, BaseObject* _parent){
 
  if (rootItem_->childExists(_object->id()))
    return;
  
  TreeItemObjectSelection* parent = 0;
  //find the parent
  if ( _parent == PluginFunctions::objectRoot() )
    parent = rootItem_;
  else
    parent = rootItem_->childExists( _parent->id() );
 
  if (!parent)
  {
    objectAdded(_parent);
    parent = rootItem_->childExists( _parent->id() );
  }
  
  QModelIndex parentIndex = getModelIndex(parent, 0);
 
  beginInsertRows(parentIndex, parent->childCount(), parent->childCount()); //insert at the bottom
 
  TreeItemObjectSelection* item = new TreeItemObjectSelection( _object->id(), _object->name(), _object->dataType(), parent);
 
  parent->appendChild( item );
 
  endInsertRows();
 
  objectChanged( _object->id() );
}
 
void TreeModelObjectSelection::objectDeleted(int _id){
 
  TreeItemObjectSelection* 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 TreeModelObjectSelection::moveItem(TreeItemObjectSelection* _item, TreeItemObjectSelection* _parent ){
 
  QModelIndex itemIndex   = getModelIndex(_item, 0);
  QModelIndex oldParentIndex = itemIndex.parent();
  QModelIndex newParentIndex = getModelIndex(_parent, 0);
 
  //delete everything at the old location
  beginRemoveRows( oldParentIndex, itemIndex.row(), itemIndex.row() );
 
    _item->parent()->removeChild(_item);
 
  endRemoveRows();
 
  //insert it at the new location
  beginInsertRows(newParentIndex, _parent->childCount(), _parent->childCount() ); //insert at the bottom
    _item->setParent( _parent );
    _parent->appendChild( _item );
  endInsertRows();
 
  emit layoutChanged();
}
 
//******************************************************************************
 
TreeItemObjectSelection* TreeModelObjectSelection::getItem(const QModelIndex &index) const
{
    if (index.isValid()) {
        TreeItemObjectSelection *item = static_cast<TreeItemObjectSelection*>(index.internalPointer());
        if (item) return item;
    }
    return rootItem_;
}
 
 
//******************************************************************************
 
QString TreeModelObjectSelection::itemName(const QModelIndex &index) const
{
    if (index.isValid()) {
        TreeItemObjectSelection *item = static_cast<TreeItemObjectSelection*>(index.internalPointer());
        if (item)
          return item->name();
    }
    return "not found";
}
 
//******************************************************************************
 
int TreeModelObjectSelection::itemId(const QModelIndex &index) const
{
    if (index.isValid()) {
        TreeItemObjectSelection *item = static_cast<TreeItemObjectSelection*>(index.internalPointer());
        if (item)
          return item->id();
    }
    return -1;
}
 
//******************************************************************************
 
QModelIndex TreeModelObjectSelection::getModelIndex(TreeItemObjectSelection* _object, int _column ){
 
  // root item gets an invalid QModelIndex
  if ( _object == rootItem_ )
    return QModelIndex();
 
  QModelIndex index = createIndex(_object->row(), _column, _object);
 
  return index;
}
 
//******************************************************************************
 
QModelIndex TreeModelObjectSelection::getModelIndex(int _id, int _column ){
 
  TreeItemObjectSelection *obj = rootItem_->childExists(_id);
 
  if (obj)
    return getModelIndex (obj, _column);
 
  return QModelIndex();
}
 
 
//******************************************************************************
 
void TreeModelObjectSelection::propagateUpwards(TreeItemObjectSelection* _item, int _column, bool _value ){
 
  if ( isRoot(_item) || (!_item->isGroup()) )
    return;
 
  if (_column == 1){ //visibility
    _item->visible( _value );
 
    //the whole row has to be updated because of the grey background-color
    QModelIndex index0 = getModelIndex(_item,0);
    QModelIndex index1 = getModelIndex(_item,3);
 
    emit dataChanged( index0, index1);
 
  } else {
 
    QModelIndex index = getModelIndex(_item,_column);
    emit dataChanged(index, index);
  }
 
  propagateUpwards( _item->parent(), _column, _value );
}
 
//******************************************************************************
 
void TreeModelObjectSelection::propagateDownwards(TreeItemObjectSelection* _item, int _column ){
 
  for (int i=0; i < _item->childCount(); i++){
 
    TreeItemObjectSelection* current = _item->child(i);
 
    bool changed = false;
 
    switch ( _column ){
 
      case 1: //VISIBILTY
 
        if ( current->visible() != _item->visible() ){
 
          current->visible( _item->visible() );
          changed = true;
        }
        break;
 
      default:
        break;
    }
 
    if (changed){
      QModelIndex index = getModelIndex(current,_column);
      emit dataChanged(index, index);
    }
 
    if ( current->isGroup() )
      propagateDownwards(current, _column);
  }
}
 
//******************************************************************************
 
bool TreeModelObjectSelection::setData(const QModelIndex &index, const QVariant &value, int /*role*/)
{
 
  emit dataChangedInside( itemId(index), index.column(), value );
 
  return true;
}
 
 
//******************************************************************************
 
bool TreeModelObjectSelection::isRoot(TreeItemObjectSelection * _item) {
  return ( _item == rootItem_ ); 
}