File: tf_display.cpp

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/*
 * Copyright (c) 2012, Willow Garage, Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the Willow Garage, Inc. nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <boost/bind.hpp>

#include <OgreSceneNode.h>
#include <OgreSceneManager.h>

#include <tf/transform_listener.h>

#include "rviz/display_context.h"
#include "rviz/frame_manager.h"
#include "rviz/ogre_helpers/arrow.h"
#include "rviz/ogre_helpers/axes.h"
#include "rviz/ogre_helpers/movable_text.h"
#include "rviz/properties/bool_property.h"
#include "rviz/properties/float_property.h"
#include "rviz/properties/quaternion_property.h"
#include "rviz/properties/string_property.h"
#include "rviz/properties/vector_property.h"
#include "rviz/selection/forwards.h"
#include "rviz/selection/selection_manager.h"

#include "rviz/default_plugin/tf_display.h"

namespace rviz
{

class FrameSelectionHandler: public SelectionHandler
{
public:
  FrameSelectionHandler( FrameInfo* frame, TFDisplay* display, DisplayContext* context );
  virtual ~FrameSelectionHandler() {}

  virtual void createProperties( const Picked& obj, Property* parent_property );
  virtual void destroyProperties( const Picked& obj, Property* parent_property );

  bool getEnabled();
  void setEnabled( bool enabled );
  void setParentName( std::string parent_name );
  void setPosition( const Ogre::Vector3& position );
  void setOrientation( const Ogre::Quaternion& orientation );

private:
  FrameInfo* frame_;
  TFDisplay* display_;
  Property* category_property_;
  BoolProperty* enabled_property_;
  StringProperty* parent_property_;
  VectorProperty* position_property_;
  QuaternionProperty* orientation_property_;
};

FrameSelectionHandler::FrameSelectionHandler(FrameInfo* frame, TFDisplay* display, DisplayContext* context )
  : SelectionHandler( context )
  , frame_( frame )
  , display_( display )
  , category_property_( NULL )
  , enabled_property_( NULL )
  , parent_property_( NULL )
  , position_property_( NULL )
  , orientation_property_( NULL )
{
}

void FrameSelectionHandler::createProperties( const Picked& obj, Property* parent_property )
{
  category_property_ = new Property( "Frame " + QString::fromStdString( frame_->name_ ), QVariant(), "", parent_property );

  enabled_property_ = new BoolProperty( "Enabled", true, "", category_property_, SLOT( updateVisibilityFromSelection() ), frame_ );

  parent_property_ = new StringProperty( "Parent", "", "", category_property_ );
  parent_property_->setReadOnly( true );

  position_property_ = new VectorProperty( "Position", Ogre::Vector3::ZERO, "", category_property_ );
  position_property_->setReadOnly( true );

  orientation_property_ = new QuaternionProperty( "Orientation", Ogre::Quaternion::IDENTITY, "", category_property_ );
  orientation_property_->setReadOnly( true );
}

void FrameSelectionHandler::destroyProperties( const Picked& obj, Property* parent_property )
{
  delete category_property_; // This deletes its children as well.
  category_property_ = NULL;
  enabled_property_ = NULL;
  parent_property_ = NULL;
  position_property_ = NULL;
  orientation_property_ = NULL;
}

bool FrameSelectionHandler::getEnabled()
{
  if( enabled_property_ )
  {
    return enabled_property_->getBool();
  }
  return false; // should never happen, but don't want to crash if it does.
}

void FrameSelectionHandler::setEnabled( bool enabled )
{
  if( enabled_property_ )
  {
    enabled_property_->setBool( enabled );
  }
}

void FrameSelectionHandler::setParentName( std::string parent_name )
{
  if( parent_property_ )
  {
    parent_property_->setStdString( parent_name );
  }
}

void FrameSelectionHandler::setPosition( const Ogre::Vector3& position )
{
  if( position_property_ )
  {
    position_property_->setVector( position );
  }
}

void FrameSelectionHandler::setOrientation( const Ogre::Quaternion& orientation )
{
  if( orientation_property_ )
  {
    orientation_property_->setQuaternion( orientation );
  }
}

typedef std::set<FrameInfo*> S_FrameInfo;

TFDisplay::TFDisplay()
  : Display()
  , update_timer_( 0.0f )
  , changing_single_frame_enabled_state_( false )
{
  show_names_property_ = new BoolProperty( "Show Names", true, "Whether or not names should be shown next to the frames.",
                                           this, SLOT( updateShowNames() ));

  show_axes_property_ = new BoolProperty( "Show Axes", true, "Whether or not the axes of each frame should be shown.",
                                          this, SLOT( updateShowAxes() ));

  show_arrows_property_ = new BoolProperty( "Show Arrows", true, "Whether or not arrows from child to parent should be shown.",
                                            this, SLOT( updateShowArrows() ));

  scale_property_ = new FloatProperty( "Marker Scale", 1, "Scaling factor for all names, axes and arrows.", this );

  update_rate_property_ = new FloatProperty( "Update Interval", 0,
                                             "The interval, in seconds, at which to update the frame transforms.  0 means to do so every update cycle.",
                                             this );
  update_rate_property_->setMin( 0 );

  frame_timeout_property_ = new FloatProperty( "Frame Timeout", 15,
                                               "The length of time, in seconds, before a frame that has not been updated is considered \"dead\"."
                                               "  For 1/3 of this time the frame will appear correct, for the second 1/3rd it will fade to gray,"
                                               " and then it will fade out completely.",
                                               this );
  frame_timeout_property_->setMin( 1 );

  frames_category_ = new Property( "Frames", QVariant(), "The list of all frames.", this );

  all_enabled_property_ = new BoolProperty( "All Enabled", true,
                                            "Whether all the frames should be enabled or not.",
                                            frames_category_, SLOT( allEnabledChanged() ), this );

  tree_category_ = new Property( "Tree", QVariant(), "A tree-view of the frames, showing the parent/child relationships.", this );
}

TFDisplay::~TFDisplay()
{
  if ( initialized() )
  {
    root_node_->removeAndDestroyAllChildren();
    scene_manager_->destroySceneNode( root_node_->getName() );
  }
}

void TFDisplay::onInitialize()
{
  frame_config_enabled_state_.clear();

  root_node_ = scene_node_->createChildSceneNode();

  names_node_ = root_node_->createChildSceneNode();
  arrows_node_ = root_node_->createChildSceneNode();
  axes_node_ = root_node_->createChildSceneNode();
}

void TFDisplay::load(const Config& config)
{
  Display::load(config);

  // Load the enabled state for all frames specified in the config, and store
  // the values in a map so that the enabled state can be properly set once
  // the frame is created
  Config c = config.mapGetChild("Frames");
  for( Config::MapIterator iter = c.mapIterator(); iter.isValid(); iter.advance() )
  {
    QString key = iter.currentKey();
    if( key != "All Enabled" )
    {
      const Config& child = iter.currentChild();
      bool enabled = child.mapGetChild("Value").getValue().toBool();

      frame_config_enabled_state_[key.toStdString()] = enabled;
    }
  }
}

void TFDisplay::clear()
{
  // Clear the tree.
  tree_category_->removeChildren();

  // Clear the frames category, except for the "All enabled" property, which is first.
  frames_category_->removeChildren( 1 );

  S_FrameInfo to_delete;
  M_FrameInfo::iterator frame_it = frames_.begin();
  M_FrameInfo::iterator frame_end = frames_.end();
  for ( ; frame_it != frame_end; ++frame_it )
  {
    to_delete.insert( frame_it->second );
  }

  S_FrameInfo::iterator delete_it = to_delete.begin();
  S_FrameInfo::iterator delete_end = to_delete.end();
  for ( ; delete_it != delete_end; ++delete_it )
  {
    deleteFrame( *delete_it, false );
  }

  frames_.clear();

  update_timer_ = 0.0f;

  clearStatuses();
}

void TFDisplay::onEnable()
{
  root_node_->setVisible( true );

  names_node_->setVisible( show_names_property_->getBool() );
  arrows_node_->setVisible( show_arrows_property_->getBool() );
  axes_node_->setVisible( show_axes_property_->getBool() );
}

void TFDisplay::onDisable()
{
  root_node_->setVisible( false );
  clear();
}

void TFDisplay::updateShowNames()
{
  names_node_->setVisible( show_names_property_->getBool() );

  M_FrameInfo::iterator it = frames_.begin();
  M_FrameInfo::iterator end = frames_.end();
  for (; it != end; ++it)
  {
    FrameInfo* frame = it->second;

    frame->updateVisibilityFromFrame();
  }
}

void TFDisplay::updateShowAxes()
{
  axes_node_->setVisible( show_axes_property_->getBool() );

  M_FrameInfo::iterator it = frames_.begin();
  M_FrameInfo::iterator end = frames_.end();
  for (; it != end; ++it)
  {
    FrameInfo* frame = it->second;

    frame->updateVisibilityFromFrame();
  }
}

void TFDisplay::updateShowArrows()
{
  arrows_node_->setVisible( show_arrows_property_->getBool() );

  M_FrameInfo::iterator it = frames_.begin();
  M_FrameInfo::iterator end = frames_.end();
  for (; it != end; ++it)
  {
    FrameInfo* frame = it->second;

    frame->updateVisibilityFromFrame();
  }
}

void TFDisplay::allEnabledChanged()
{
  if( changing_single_frame_enabled_state_ )
  {
    return;
  }
  bool enabled = all_enabled_property_->getBool();

  M_FrameInfo::iterator it = frames_.begin();
  M_FrameInfo::iterator end = frames_.end();
  for (; it != end; ++it)
  {
    FrameInfo* frame = it->second;

    frame->enabled_property_->setBool( enabled );
  }
}

void TFDisplay::update(float wall_dt, float ros_dt)
{
  update_timer_ += wall_dt;
  float update_rate = update_rate_property_->getFloat();
  if( update_rate < 0.0001f || update_timer_ > update_rate )
  {
    updateFrames();

    update_timer_ = 0.0f;
  }
}

FrameInfo* TFDisplay::getFrameInfo( const std::string& frame )
{
  M_FrameInfo::iterator it = frames_.find( frame );
  if ( it == frames_.end() )
  {
    return NULL;
  }

  return it->second;
}

void TFDisplay::updateFrames()
{
  typedef std::vector<std::string> V_string;
  V_string frames;
  context_->getTFClient()->getFrameStrings( frames );
  std::sort(frames.begin(), frames.end());

  S_FrameInfo current_frames;

  {
    V_string::iterator it = frames.begin();
    V_string::iterator end = frames.end();
    for ( ; it != end; ++it )
    {
      const std::string& frame = *it;

      if ( frame.empty() )
      {
        continue;
      }

      FrameInfo* info = getFrameInfo( frame );
      if (!info)
      {
        info = createFrame(frame);
      }
      else
      {
        updateFrame(info);
      }

      current_frames.insert( info );
    }
  }

  {
    S_FrameInfo to_delete;
    M_FrameInfo::iterator frame_it = frames_.begin();
    M_FrameInfo::iterator frame_end = frames_.end();
    for ( ; frame_it != frame_end; ++frame_it )
    {
      if ( current_frames.find( frame_it->second ) == current_frames.end() )
      {
        to_delete.insert( frame_it->second );
      }
    }

    S_FrameInfo::iterator delete_it = to_delete.begin();
    S_FrameInfo::iterator delete_end = to_delete.end();
    for ( ; delete_it != delete_end; ++delete_it )
    {
      deleteFrame( *delete_it, true );
    }
  }

  context_->queueRender();
}

static const Ogre::ColourValue ARROW_HEAD_COLOR(1.0f, 0.1f, 0.6f, 1.0f);
static const Ogre::ColourValue ARROW_SHAFT_COLOR(0.8f, 0.8f, 0.3f, 1.0f);

FrameInfo* TFDisplay::createFrame(const std::string& frame)
{
  FrameInfo* info = new FrameInfo( this );
  frames_.insert( std::make_pair( frame, info ) );

  info->name_ = frame;
  info->last_update_ = ros::Time::now();
  info->axes_ = new Axes( scene_manager_, axes_node_, 0.2, 0.02 );
  info->axes_->getSceneNode()->setVisible( show_axes_property_->getBool() );
  info->selection_handler_.reset( new FrameSelectionHandler( info, this, context_ ));
  info->selection_handler_->addTrackedObjects( info->axes_->getSceneNode() );

  info->name_text_ = new MovableText( frame, "Font", 0.1 );
  info->name_text_->setTextAlignment(MovableText::H_CENTER, MovableText::V_BELOW);
  info->name_node_ = names_node_->createChildSceneNode();
  info->name_node_->attachObject( info->name_text_ );
  info->name_node_->setVisible( show_names_property_->getBool() );

  info->parent_arrow_ = new Arrow( scene_manager_, arrows_node_, 1.0f, 0.01, 1.0f, 0.08 );
  info->parent_arrow_->getSceneNode()->setVisible( false );
  info->parent_arrow_->setHeadColor(ARROW_HEAD_COLOR);
  info->parent_arrow_->setShaftColor(ARROW_SHAFT_COLOR);

  info->enabled_property_ = new BoolProperty( QString::fromStdString( info->name_ ), true, "Enable or disable this individual frame.",
                                              frames_category_, SLOT( updateVisibilityFromFrame() ), info );

  info->parent_property_ = new StringProperty( "Parent", "", "Parent of this frame.  (Not editable)",
                                               info->enabled_property_ );
  info->parent_property_->setReadOnly( true );

  info->position_property_ = new VectorProperty( "Position", Ogre::Vector3::ZERO,
                                                 "Position of this frame, in the current Fixed Frame.  (Not editable)",
                                                 info->enabled_property_ );
  info->position_property_->setReadOnly( true );

  info->orientation_property_ = new QuaternionProperty( "Orientation", Ogre::Quaternion::IDENTITY,
                                                        "Orientation of this frame, in the current Fixed Frame.  (Not editable)",
                                                        info->enabled_property_ );
  info->orientation_property_->setReadOnly( true );

  info->rel_position_property_ = new VectorProperty( "Relative Position", Ogre::Vector3::ZERO,
                                                 "Position of this frame, relative to it's parent frame.  (Not editable)",
                                                 info->enabled_property_ );
  info->rel_position_property_->setReadOnly( true );

  info->rel_orientation_property_ = new QuaternionProperty( "Relative Orientation", Ogre::Quaternion::IDENTITY,
                                                        "Orientation of this frame, relative to it's parent frame.  (Not editable)",
                                                        info->enabled_property_ );
  info->rel_orientation_property_->setReadOnly( true );

  // If the current frame was specified as disabled in the config file
  // then its enabled state must be updated accordingly
  if( frame_config_enabled_state_.count(frame) > 0 && !frame_config_enabled_state_[frame] )
  {
      info->enabled_property_->setBool(false);
  }

  updateFrame( info );

  return info;
}

Ogre::ColourValue lerpColor(const Ogre::ColourValue& start, const Ogre::ColourValue& end, float t)
{
  return start * t + end * (1 - t);
}

void TFDisplay::updateFrame( FrameInfo* frame )
{
  tf::TransformListener* tf = context_->getTFClient();

  // Check last received time so we can grey out/fade out frames that have stopped being published
  ros::Time latest_time;
  tf->getLatestCommonTime( fixed_frame_.toStdString(), frame->name_, latest_time, 0 );

  if(( latest_time != frame->last_time_to_fixed_ ) ||
     ( latest_time == ros::Time() ))
  {
    frame->last_update_ = ros::Time::now();
    frame->last_time_to_fixed_ = latest_time;
  }

  // Fade from color -> grey, then grey -> fully transparent
  ros::Duration age = ros::Time::now() - frame->last_update_;
  float frame_timeout = frame_timeout_property_->getFloat();
  float one_third_timeout = frame_timeout * 0.3333333f;
  if( age > ros::Duration( frame_timeout ))
  {
    frame->parent_arrow_->getSceneNode()->setVisible(false);
    frame->axes_->getSceneNode()->setVisible(false);
    frame->name_node_->setVisible(false);
    return;
  }
  else if (age > ros::Duration(one_third_timeout))
  {
    Ogre::ColourValue grey(0.7, 0.7, 0.7, 1.0);

    if (age > ros::Duration(one_third_timeout * 2))
    {
      float a = std::max(0.0, (frame_timeout - age.toSec())/one_third_timeout);
      Ogre::ColourValue c = Ogre::ColourValue(grey.r, grey.g, grey.b, a);

      frame->axes_->setXColor(c);
      frame->axes_->setYColor(c);
      frame->axes_->setZColor(c);
      frame->name_text_->setColor(c);
      frame->parent_arrow_->setColor(c.r, c.g, c.b, c.a);
    }
    else
    {
      float t = std::max(0.0, (one_third_timeout * 2 - age.toSec())/one_third_timeout);
      frame->axes_->setXColor(lerpColor(frame->axes_->getDefaultXColor(), grey, t));
      frame->axes_->setYColor(lerpColor(frame->axes_->getDefaultYColor(), grey, t));
      frame->axes_->setZColor(lerpColor(frame->axes_->getDefaultZColor(), grey, t));
      frame->name_text_->setColor(lerpColor(Ogre::ColourValue::White, grey, t));
      frame->parent_arrow_->setShaftColor(lerpColor(ARROW_SHAFT_COLOR, grey, t));
      frame->parent_arrow_->setHeadColor(lerpColor(ARROW_HEAD_COLOR, grey, t));
    }
  }
  else
  {
    frame->axes_->setToDefaultColors();
    frame->name_text_->setColor(Ogre::ColourValue::White);
    frame->parent_arrow_->setHeadColor(ARROW_HEAD_COLOR);
    frame->parent_arrow_->setShaftColor(ARROW_SHAFT_COLOR);
  }

  setStatusStd(StatusProperty::Ok, frame->name_, "Transform OK");

  Ogre::Vector3 position;
  Ogre::Quaternion orientation;
  if( !context_->getFrameManager()->getTransform( frame->name_, ros::Time(), position, orientation ))
  {
    std::stringstream ss;
    ss << "No transform from [" << frame->name_ << "] to frame [" << fixed_frame_.toStdString() << "]";
    setStatusStd(StatusProperty::Warn, frame->name_, ss.str());
    ROS_DEBUG( "Error transforming frame '%s' to frame '%s'", frame->name_.c_str(), qPrintable( fixed_frame_ ));
    frame->name_node_->setVisible( false );
    frame->axes_->getSceneNode()->setVisible( false );
    frame->parent_arrow_->getSceneNode()->setVisible( false );
    return;
  }

  frame->selection_handler_->setPosition( position );
  frame->selection_handler_->setOrientation( orientation );

  bool frame_enabled = frame->enabled_property_->getBool();

  frame->axes_->setPosition( position );
  frame->axes_->setOrientation( orientation );
  frame->axes_->getSceneNode()->setVisible( show_axes_property_->getBool() && frame_enabled);
  float scale = scale_property_->getFloat();
  frame->axes_->setScale( Ogre::Vector3( scale, scale, scale ));

  frame->name_node_->setPosition( position );
  frame->name_node_->setVisible( show_names_property_->getBool() && frame_enabled );
  frame->name_node_->setScale( scale, scale, scale );

  frame->position_property_->setVector( position );
  frame->orientation_property_->setQuaternion( orientation );

  std::string old_parent = frame->parent_;
  frame->parent_.clear();
  bool has_parent = tf->getParent( frame->name_, ros::Time(), frame->parent_ );
  if( has_parent )
  {
    // If this frame has no tree property or the parent has changed,
    if( !frame->tree_property_ || old_parent != frame->parent_ )
    {
      // Look up the new parent.
      M_FrameInfo::iterator parent_it = frames_.find( frame->parent_ );
      if( parent_it != frames_.end() )
      {
        FrameInfo* parent = parent_it->second;

        // If the parent has a tree property, make a new tree property for this frame.
        if( parent->tree_property_ )
        {
          if(!frame->tree_property_) {
            frame->tree_property_ = new Property( QString::fromStdString( frame->name_ ), QVariant(), "", parent->tree_property_ );
          } else {
            frame->tree_property_->setParent(parent->tree_property_);
            frame->tree_property_->setName(QString::fromStdString( frame->name_ ));
            frame->tree_property_->setValue(QVariant());
            frame->tree_property_->setDescription("");
          }
        }
      }
    }

    tf::StampedTransform transform;
    try {
      context_->getFrameManager()->getTFClientPtr()->lookupTransform(frame->parent_,frame->name_,ros::Time(0),transform);
    }
    catch(tf::TransformException& e)
    {
      ROS_DEBUG( "Error transforming frame '%s' (parent of '%s') to frame '%s'",
                 frame->parent_.c_str(), frame->name_.c_str(), qPrintable( fixed_frame_ ));
    }

    // get the position/orientation relative to the parent frame
    Ogre::Vector3 relative_position( transform.getOrigin().x(), transform.getOrigin().y(), transform.getOrigin().z() );
    Ogre::Quaternion relative_orientation( transform.getRotation().w(), transform.getRotation().x(), transform.getRotation().y(), transform.getRotation().z() );
    frame->rel_position_property_->setVector( relative_position );
    frame->rel_orientation_property_->setQuaternion( relative_orientation );

    if( show_arrows_property_->getBool() )
    {
      Ogre::Vector3 parent_position;
      Ogre::Quaternion parent_orientation;
      if (!context_->getFrameManager()->getTransform(frame->parent_, ros::Time(), parent_position, parent_orientation))
      {
        ROS_DEBUG( "Error transforming frame '%s' (parent of '%s') to frame '%s'",
                   frame->parent_.c_str(), frame->name_.c_str(), qPrintable( fixed_frame_ ));
      }

      Ogre::Vector3 direction = parent_position - position;
      float distance = direction.length();
      direction.normalise();

      Ogre::Quaternion orient = Ogre::Vector3::NEGATIVE_UNIT_Z.getRotationTo( direction );

      frame->distance_to_parent_ = distance;
      float head_length = ( distance < 0.1*scale ) ? (0.1*scale*distance) : 0.1*scale;
      float shaft_length = distance - head_length;
      // aleeper: This was changed from 0.02 and 0.08 to 0.01 and 0.04 to match proper radius handling in arrow.cpp
      frame->parent_arrow_->set( shaft_length, 0.01*scale, head_length, 0.04*scale );

      if ( distance > 0.001f )
      {
        frame->parent_arrow_->getSceneNode()->setVisible( show_arrows_property_->getBool() && frame_enabled );
      }
      else
      {
        frame->parent_arrow_->getSceneNode()->setVisible( false );
      }

      frame->parent_arrow_->setPosition( position );
      frame->parent_arrow_->setOrientation( orient );
    }
    else
    {
      frame->parent_arrow_->getSceneNode()->setVisible( false );
    }
  }
  else
  {
    if ( !frame->tree_property_ || old_parent != frame->parent_ )
    {
      if(!frame->tree_property_) {
        frame->tree_property_ = new Property( QString::fromStdString( frame->name_ ), QVariant(), "", tree_category_ );
      } else {
        frame->tree_property_->setName(QString::fromStdString( frame->name_ ));
        frame->tree_property_->setValue(QVariant());
        frame->tree_property_->setDescription("");
        frame->tree_property_->setParent(tree_category_);
      }
    }

    frame->parent_arrow_->getSceneNode()->setVisible( false );
  }

  frame->parent_property_->setStdString( frame->parent_ );
  frame->selection_handler_->setParentName( frame->parent_ );
}

void TFDisplay::deleteFrame( FrameInfo* frame, bool delete_properties )
{
  M_FrameInfo::iterator it = frames_.find( frame->name_ );
  ROS_ASSERT( it != frames_.end() );

  frames_.erase( it );

  delete frame->axes_;
  context_->getSelectionManager()->removeObject( frame->axes_coll_ );
  delete frame->parent_arrow_;
  delete frame->name_text_;
  scene_manager_->destroySceneNode( frame->name_node_->getName() );
  if( delete_properties )
  {
    delete frame->enabled_property_;
    delete frame->tree_property_;
  }
  delete frame;
}

void TFDisplay::fixedFrameChanged()
{
  update_timer_ = update_rate_property_->getFloat();
}

void TFDisplay::reset()
{
  Display::reset();
  clear();
}

/////////////////////////////////////////////////////////////////////////////////////////////////////////
// FrameInfo

FrameInfo::FrameInfo( TFDisplay* display )
  : display_( display )
  , axes_( NULL )
  , axes_coll_( 0 )
  , parent_arrow_( NULL )
  , name_text_( NULL )
  , distance_to_parent_( 0.0f )
  , arrow_orientation_(Ogre::Quaternion::IDENTITY)
  , tree_property_( NULL )
{}

void FrameInfo::updateVisibilityFromFrame()
{
  bool enabled = enabled_property_->getBool();
  selection_handler_->setEnabled( enabled );
  setEnabled( enabled );
}

void FrameInfo::updateVisibilityFromSelection()
{
  bool enabled = selection_handler_->getEnabled();
  enabled_property_->setBool( enabled );
  setEnabled( enabled );
}

void FrameInfo::setEnabled( bool enabled )
{
  if( name_node_ )
  {
    name_node_->setVisible( display_->show_names_property_->getBool() && enabled );
  }

  if( axes_ )
  {
    axes_->getSceneNode()->setVisible( display_->show_axes_property_->getBool() && enabled );
  }

  if( parent_arrow_ )
  {
    if( distance_to_parent_ > 0.001f )
    {
      parent_arrow_->getSceneNode()->setVisible( display_->show_arrows_property_->getBool() && enabled );
    }
    else
    {
      parent_arrow_->getSceneNode()->setVisible( false );
    }
  }

  if( display_->all_enabled_property_->getBool() && !enabled)
  {
    display_->changing_single_frame_enabled_state_ = true;
    display_->all_enabled_property_->setBool( false );
    display_->changing_single_frame_enabled_state_ = false;
  }

  // Update the configuration that stores the enabled state of all frames
  display_->frame_config_enabled_state_[this->name_] = enabled;

  display_->context_->queueRender();
}

} // namespace rviz

#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS( rviz::TFDisplay, rviz::Display )