/*
 * Copyright (c) 2011, 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 <QTextBrowser>

#include "rviz/properties/property.h"
#include "rviz/properties/property_tree_widget.h"

#include "rviz/properties/property_tree_with_help.h"

namespace rviz
{

PropertyTreeWithHelp::PropertyTreeWithHelp( QWidget* parent )
  : QSplitter( parent )
{
  setOrientation( Qt::Vertical );

  property_tree_ = new PropertyTreeWidget;

  help_ = new QTextBrowser;
  help_->setOpenExternalLinks( true );

  addWidget( property_tree_ );
  addWidget( help_ );

  setStretchFactor( 0, 1000 );
  setCollapsible( 0, false );

  QList<int> _sizes;
  _sizes.push_back( 1000 );
  _sizes.push_back( 1 );
  setSizes( _sizes );

  connect( property_tree_, SIGNAL( currentPropertyChanged( const Property* )),
           this, SLOT( showHelpForProperty( const Property* )));
}

void PropertyTreeWithHelp::showHelpForProperty( const Property* property )
{
  if( property )
  {
    QString body_text = property->getDescription();
    QString heading = property->getName();
    QString html = "<html><body><strong>" + heading + "</strong><br>" + body_text + "</body></html>";
    help_->setHtml( html );
  }
  else
  {
    help_->setHtml( "" );
  }
}

void PropertyTreeWithHelp::save( Config config ) const
{
  property_tree_->save( config.mapMakeChild( "Property Tree Widget" ));

  QList<int> _sizes = sizes();
  config.mapSetValue( "Tree Height", _sizes.at( 0 ));
  config.mapSetValue( "Help Height", _sizes.at( 1 ));
}

void PropertyTreeWithHelp::load( const Config& config )
{
  property_tree_->load( config.mapGetChild( "Property Tree Widget" ));

  int tree_height;
  int help_height;
  if( config.mapGetInt( "Tree Height", &tree_height ) &&
      config.mapGetInt( "Help Height", &help_height ))
  {
    QList<int> _sizes;
    _sizes.push_back( tree_height );
    _sizes.push_back( help_height );
    setSizes( _sizes );
  }
}

} // end namespace rviz
