/* $Id: highlight.js,v 1.0 2009/05/09 19:12:12 srobert72 Exp $ */

/**
 * @file
 * Common marker highlighting routines.
 */

/*global $, Drupal */

/**
 * Highlights marker on rollover.
 * Removes highlight on previous marker.
 *
 * Creates a "circle" using 20-sided GPolygon at the given point
 * Circle polygon object is global variable as there is only one highlighted marker at a time
 * and we want to remove the previously placed polygon before placing a new one.
 * 
 * Original code "Google Maps JavaScript API Example"
 */
var highlightCircle;
highlightCurrentMarker = function (map, currentMarker) {
  var markerPoint = currentMarker.marker.getPoint();

  var polyPoints = Array();

  if (highlightCircle) {
    map.removeOverlay(highlightCircle);
  }

  var mapNormalProj = G_NORMAL_MAP.getProjection();
  var mapZoom = map.getZoom();
  var clickedPixel = mapNormalProj.fromLatLngToPixel(markerPoint, mapZoom);

  var polySmallRadius = 20;

  var polyNumSides = 20;
  var polySideLength = 18;

  for (var a = 0; a<(polyNumSides+1); a++) {
    var aRad = polySideLength*a*(Math.PI/180);
    var polyRadius = polySmallRadius; 
	var pixelX = clickedPixel.x + polyRadius * Math.cos(aRad);
    var pixelY = clickedPixel.y + polyRadius * Math.sin(aRad);
    var polyPixel = new GPoint(pixelX,pixelY);
    var polyPoint = mapNormalProj.fromPixelToLatLng(polyPixel,mapZoom);
    polyPoints.push(polyPoint);
  }
  // Using GPolygon(points,  strokeColor?,  strokeWeight?,  strokeOpacity?,  fillColor?,  fillOpacity?)
  highlightCircle = new GPolygon(polyPoints,"#000000",2,0.0,"#FF0000",.5);
  map.addOverlay(highlightCircle);
};