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

/**
 * 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"
 */
highlightMarker = function (map, currentMarker, highlightID, color) {
    var markerPoint = currentMarker.marker.getPoint();
    var polyPoints = Array();

    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?)
    map.highlightID = new GPolygon(polyPoints, color, 2, 0, color, 0.5);
    map.addOverlay(map.highlightID);
};

unHighlightMarker = function (map, currentMarker, highlightID) {
    if (map.highlightID) {
        map.removeOverlay(map.highlightID);
        delete map.highlightID;
    }
};