/*
 * Copyright (c) 2008, 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.
 */
 /*
 * measure_tool.cpp
 *
 *  Created on: Aug 8, 2012
 *      Author: gossow
 */

#include "measure_tool.h"

#include "rviz/ogre_helpers/line.h"
#include "rviz/viewport_mouse_event.h"
#include "rviz/display_context.h"
#include "rviz/selection/selection_manager.h"
#include "rviz/load_resource.h"

#include <OgreSceneNode.h>

#include <sstream>

namespace rviz
{

MeasureTool::MeasureTool() :
    state_(START),
    length_(-1)
{
}

MeasureTool::~MeasureTool()
{
  delete line_;
}

void MeasureTool::onInitialize()
{
  line_ = new Line(context_->getSceneManager());

  std_cursor_ = getDefaultCursor();
  hit_cursor_ = makeIconCursor( "package://rviz/icons/crosshair.svg" );
}

void MeasureTool::activate()
{
  state_ = START;
}

void MeasureTool::deactivate()
{
}

int MeasureTool::processMouseEvent( ViewportMouseEvent& event )
{
  int flags = 0;

  Ogre::Vector3 pos;

  std::stringstream ss;

  bool success = context_->getSelectionManager()->get3DPoint( event.viewport, event.x, event.y, pos );
  setCursor( success ? hit_cursor_ : std_cursor_ );

  switch ( state_ )
  {
    case START:
      break;
    case END:
      if ( success )
      {
        line_->setPoints(start_,pos);
        length_ = (start_-pos).length();
      }
      break;
  }

  if ( length_ > 0.0 )
  {
    ss << "[Length: " << length_ << "m] ";
  }

  ss << "Click on two points to measure their distance. Right-click to reset.";
  setStatus( QString( ss.str().c_str() ) );

  if( event.leftUp() && success )
  {
    switch ( state_ )
    {
      case START:
        start_ = pos;
        state_ = END;
        break;
      case END:
        end_ = pos;
        state_ = START;
        line_->setPoints(start_,end_);
        break;
    }

    flags |= Render;
  }

  if ( event.rightUp() )
  {
    state_ = START;
    line_->setVisible(false);
  }

  return flags;
}

} /* namespace rviz */


#include <pluginlib/class_list_macros.h>
PLUGINLIB_EXPORT_CLASS( rviz::MeasureTool, rviz::Tool )
