TreeItem.cc

/*===========================================================================*\
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*                              OpenFlipper                                   *
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\*===========================================================================*/

/*===========================================================================*\
*                                                                            *
*   $Revision: 10272 $                                                       *
*   $LastChangedBy: moebius $                                                *
*   $Date: 2010-11-24 17:45:10 +0100 (Mi, 24 Nov 2010) $                     *
*                                                                            *
\*===========================================================================*/

#include "TreeItem.hh"

QMap<int,TreeItem*> TreeItem::kTreeMap_;

//--------------------------------------------------------------------------------

TreeItem::TreeItem(int _id, QString _name, DataType _type, TreeItem* _parent) :
  id_(_id),
  dataType_(_type),
  target_(true),
  source_(false),
  visible_(true),
  name_(_name),
  parentItem_(_parent),
  row_(0)
{
  // Remember ourself ;-)
  kTreeMap_[_id] = this;
}


TreeItem::~TreeItem() {
  // Remove itself from map
  QMap<int,TreeItem*>::iterator iter = kTreeMap_.find( id() );
  if( iter != kTreeMap_.end() ) {
    kTreeMap_.erase(iter);
  } else {
    std::cerr << "Map accelerator destructor in DataControl: Currently removing object that is not in the map!" << std::endl;
  }
}


// ===============================================================================
// Static Members
// ===============================================================================

int TreeItem::id() {
  return id_;
}

//--------------------------------------------------------------------------------

bool TreeItem::dataType(DataType _type) {
  if ( _type == DATA_ALL ) {
    return true;
  }

  return ( dataType_ & _type);
}

//--------------------------------------------------------------------------------

DataType TreeItem::dataType() {
  return dataType_;
}

//--------------------------------------------------------------------------------

int TreeItem::group() {
  // Skip root node
  if ( parent() == 0 )
    return -1;

  // Don't count root node as a group
  if ( parent()->parent() == 0 )
    return -1;

  // Only consider groups
  if ( !parent()->dataType(DATA_GROUP) )
    return -1;

  // Get the group id
  return ( parent()->id() );
}

//--------------------------------------------------------------------------------

bool TreeItem::isGroup() {
  return ( dataType(DATA_GROUP) );
}

// ===============================================================================
// Dynamic Members
// ===============================================================================

bool TreeItem::target() {
  return target_;
}

//--------------------------------------------------------------------------------

void TreeItem::target(bool _target) {
  target_= _target;
}

//--------------------------------------------------------------------------------

bool TreeItem::source() {
  return source_;
}

//--------------------------------------------------------------------------------

void TreeItem::source(bool _source) {
  source_ = _source;
}

//--------------------------------------------------------------------------------

bool TreeItem::visible() {
  return visible_;
}

//--------------------------------------------------------------------------------

void TreeItem::visible(bool _visible) {
  visible_ = _visible;
}

//--------------------------------------------------------------------------------

QString TreeItem::name() {
  return name_;
}

//--------------------------------------------------------------------------------

void TreeItem::name(QString _name ) {
  name_ = _name;
}

// ===============================================================================
// Tree Structure
// ===============================================================================

TreeItem* TreeItem::next() {
  // Visit child item of this node
  if ( childItems_.size() > 0 ) {
     return childItems_[0];
  }

  // No Child Item so visit the next child of the parentItem_
  if ( parentItem_ ) {

    TreeItem* parentPointer = parentItem_;
    TreeItem* thisPointer   = this;

    // while we are not at the root node
    while ( parentPointer ) {

      // If there is an unvisited child of the parent, return this one
      int position = thisPointer->row() + 1;
      if ( parentPointer->childCount() > position ) {
        return parentPointer->childItems_[ position ];
      }

      // Go to the next level
      thisPointer   = parentPointer;
      parentPointer = parentPointer->parentItem_;

    }

    return thisPointer;
  }

  return this;

}

//--------------------------------------------------------------------------------

int TreeItem::level() {
  int level = 0;
  TreeItem* current = this;

  // Go up and count the levels to the root node
  while ( current->parent() != 0 ) {
    level++;
    current = current->parent();
  }

  return level;
}

//--------------------------------------------------------------------------------

int TreeItem::row() const
{
  return row_;
}

//--------------------------------------------------------------------------------

TreeItem* TreeItem::parent()
{
  return parentItem_;
}

//--------------------------------------------------------------------------------

void TreeItem::setParent(TreeItem* _parent) {
  parentItem_ = _parent;
}

//--------------------------------------------------------------------------------

void TreeItem::appendChild(TreeItem *item)
{
  kTreeMap_[item->id()] = item;
  childItems_.append(item);
  item->row_ = childItems_.size() - 1;
}

//--------------------------------------------------------------------------------

TreeItem *TreeItem::child(int row)
{
    return childItems_.value(row);
}

//--------------------------------------------------------------------------------

int TreeItem::childCount() const
{
    return childItems_.count();
}

//--------------------------------------------------------------------------------

TreeItem* TreeItem::childExists(int _objectId) {

  // Check if this object has the requested id
  if ( id_ == _objectId )
    return this;

  // Check the map, for the item
  QMap<int,TreeItem*>::const_iterator iter = kTreeMap_.find(_objectId);

  // Not found -> return 0
  if( iter == kTreeMap_.end() ) {
    return 0;
  }

  // Move the tree up and check if we are in the line to the root
  TreeItem* current = *iter;

  while ( true ) {

    // Current item is a parent of the found one
    if ( current == this ) {
      return *iter;
    }

    // Move to parent or if there is no parent, we return 0
    if ( current->parent() != 0) {
      current = current->parent();
    } else
      return 0;
  }

  // Not in the line, so child does not exist
  return 0;
}

//--------------------------------------------------------------------------------

void TreeItem::removeChild( TreeItem* _item ) {

  int idx = (_item != 0) ? _item->row_ : -1;

  if ( (idx < 0) || (idx >= childItems_.size()) || (childItems_[idx] != _item) ) {
    std::cerr << "TreeItem: Illegal remove request" << std::endl;
    return;
  }

  childItems_.removeAt(idx);

  for ( ; idx < childItems_.size(); ++idx ) {
    --(childItems_[idx]->row_);
  }
}

//--------------------------------------------------------------------------------

QList< TreeItem* > TreeItem::getLeafs() {

  QList< TreeItem* > items;

  for ( int i = 0 ; i < childItems_.size(); ++i ) {
    items = items + childItems_[i]->getLeafs();
  }

  // If we are a leave...
  if ( childCount() == 0 )
    items.push_back(this);

  return items;
}

//--------------------------------------------------------------------------------

void TreeItem::deleteSubtree() {

  // call function for all children of this node
  for ( int i = 0 ; i < childItems_.size(); ++i) {

    // remove the subtree recursively
    childItems_[i]->deleteSubtree();

    // delete child
    delete childItems_[i];
  }

  // clear the array
  childItems_.clear();
}

//=============================================================================