/**

 * Volume widget presentation code

 * 

 * Greyhound - real web management for Amarok

 * Copyright (C) 2008 Dan Fuhry

 *

 * This program is Free Software; you can redistribute and/or modify it under the terms of the GNU General Public License

 * as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

 *

 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied

 * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for details.

 */

var current_volume = 0;

function set_volume_fill(amount)

{

  amount = 10 * ( Math.round(amount / 10) );

  if ( amount == 0 )

    amount = -10;

  for ( var i = 0; i <= amount; i += 10 )

  {

    if ( !$('volbtn_' + i).hasClass('volume_button_active') )

    {

      $('volbtn_' + i).addClass('volume_button_active');

    }

  }

  for ( ; i <= 100; i += 10 )

  {

    if ( $('volbtn_' + i).hasClass('volume_button_active') )

    {

      $('volbtn_' + i).rmClass('volume_button_active');

    }

  }

}

function volume_over(amount)

{

  set_volume_fill(amount);

}

function volume_out()

{

  set_volume_fill(current_volume);

}

function set_volume(level)

{

  setAjaxLoading();

  if ( level == current_volume )

    return false;

  ajaxGet('/action.json/volume/' + level, function()

    {

      if ( ajax.readyState == 4 && ajax.status == 200 )

      {

        unsetAjaxLoading();

        var response = (' ' + ajax.responseText).substr(1);

        // quickie JSON parser :)

        response = eval('(' + response + ')');

        // update volume

        if ( response.volume != current_volume )

        {

          set_volume_fill(response.volume);

          current_volume = response.volume;

        }

      }

    });

}