// this variable will collect the html which will eventually be placed in the side_bar
var side_bar_html = "";
var gmarkers = [];
var gicons = [];
var map = null;
var infowindow = new google.maps.InfoWindow({
size: new google.maps.Size(150, 50)
});
gicons["red"] = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/red.png",
// This marker is 32 pixels wide by 32 pixels tall.
new google.maps.Size(32, 32),
// The origin for this image is 0,0.
new google.maps.Point(0, 0),
// The anchor for this image is at 16,32.
new google.maps.Point(16, 32));
// Marker sizes are expressed as a Size of X,Y
// where the origin of the image (0,0) is located
// in the top left of the image.
// Origins, anchor positions and coordinates of the marker
// increase in the X direction to the right and in
// the Y direction down.
var iconImage = new google.maps.MarkerImage('http://maps.google.com/mapfiles/ms/micons/red.png',
// This marker is 32 pixels wide by 32 pixels tall.
new google.maps.Size(32, 32),
// The origin for this image is 0,0.
new google.maps.Point(0, 0),
// The anchor for this image is at 16,32.
new google.maps.Point(16, 32));
// Shapes define the clickable region of the icon.
// The type defines an HTML <area> element 'poly' which
// traces out a polygon as a series of X,Y points. The final
// coordinate closes the poly by connecting to the first
// coordinate.
var iconShape = {
coord: [9, 0, 6, 1, 4, 2, 2, 4, 0, 8, 0, 12, 1, 14, 2, 16, 5, 19, 7, 23, 8, 26, 9, 30, 9, 34, 11, 34, 11, 30, 12, 26, 13, 24, 14, 21, 16, 18, 18, 16, 20, 12, 20, 8, 18, 4, 16, 2, 15, 1, 13, 0],
type: 'poly'
};
function getMarkerImage(iconColor) {
if ((typeof(iconColor) == "undefined") || (iconColor == null)) {
iconColor = "red";
}
if (!gicons[iconColor]) {
gicons[iconColor] = new google.maps.MarkerImage("http://maps.google.com/mapfiles/ms/micons/" + iconColor + ".png",
// This marker is 20 pixels wide by 34 pixels tall.
new google.maps.Size(32, 32),
// The origin for this image is 0,0.
new google.maps.Point(0, 0),
// The anchor for this image is at 6,20.
new google.maps.Point(16, 32));
}
return gicons[iconColor];
}
function category2color(category) {
var color = "red";
switch (category) {
case "theatre":
color = "blue";
break;
case "golf":
color = "green";
break;
case "info":
color = "yellow";
break;
default:
color = "red";
break;
}
return color;
}
gicons["theatre"] = getMarkerImage(category2color("theatre"));
gicons["golf"] = getMarkerImage(category2color("golf"));
gicons["info"] = getMarkerImage(category2color("info"));
// A function to create the marker and set up the event window
function createMarker(latlng, name, html, category) {
var contentString = html;
var marker = new google.maps.Marker({
position: latlng,
icon: gicons[category],
map: map,
title: name,
zIndex: Math.round(latlng.lat() * -100000) << 5
});
// === Store the category and name info as a marker properties ===
marker.mycategory = category;
marker.myname = name;
gmarkers.push(marker);
google.maps.event.addListener(marker, 'click', function() {
infowindow.setContent(contentString);
infowindow.open(map, marker);
});
}
// == shows all markers of a particular category, and ensures the checkbox is checked ==
function show(category) {
for (var i = 0; i < gmarkers.length; i++) {
if (gmarkers[i].mycategory == category) {
gmarkers[i].setVisible(true);
}
}
// == check the checkbox ==
document.getElementById(category + "box").checked = true;
}
// == hides all markers of a particular category, and ensures the checkbox is cleared ==
function hide(category) {
for (var i = 0; i < gmarkers.length; i++) {
if (gmarkers[i].mycategory == category) {
gmarkers[i].setVisible(false);
}
}
// == clear the checkbox ==
document.getElementById(category + "box").checked = false;
// == close the info window, in case its open on a marker that we just hid
infowindow.close();
}
// == a checkbox has been clicked ==
function boxclick(box, category) {
if (box.checked) {
show(category);
} else {
hide(category);
}
// == rebuild the side bar
makeSidebar();
}
function myclick(i) {
google.maps.event.trigger(gmarkers[i], "click");
}
// == rebuilds the sidebar to match the markers currently displayed ==
function makeSidebar() {
var html = "";
for (var i = 0; i < gmarkers.length; i++) {
if (gmarkers[i].getVisible()) {
html += '<a href="javascript:myclick(' + i + ')">' + gmarkers[i].myname + '<\/a><br>';
}
}
document.getElementById("side_bar").innerHTML = html;
}
function initialize() {
var myOptions = {
zoom: 11,
center: new google.maps.LatLng(53.8363, -3.0377),
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map"), myOptions);
google.maps.event.addListener(map, 'click', function() {
infowindow.close();
});
// Read the data
// downloadUrl("categories.xml", function(doc) {
var xml = xmlParse(xmlData);
var markers = xml.documentElement.getElementsByTagName("marker");
for (var i = 0; i < markers.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(markers[i].getAttribute("lat"));
var lng = parseFloat(markers[i].getAttribute("lng"));
var point = new google.maps.LatLng(lat, lng);
var address = markers[i].getAttribute("address");
var name = markers[i].getAttribute("name");
var html = "<b>" + name + "<\/b><p>" + address;
var category = markers[i].getAttribute("category");
// create the marker
var marker = createMarker(point, name, html, category);
}
// == show or hide the categories initially ==
show("theatre");
hide("golf");
hide("info");
// == create the initial sidebar ==
makeSidebar();
// });
}
google.maps.event.addDomListener(window, 'load', initialize);
var xmlData = '<markers> <marker name="Grand Theatre" address="33 Church St, Blackpool, Lancashire, FY1 1HT" lng="-3.053102" lat="53.817260" category="theatre" /> <marker name="Claremont Theatre Club" address="Burwood Dr, Blackpool, Lancashire, FY3 8NS" lng="-3.049690" lat="53.829649" category="theatre" /> <marker name="Pendle Productions" address="249 Hawes Side La, Blackpool, Lancashire, FY4 4AA" lng="-3.030698" lat="53.794399" category="theatre" /> <marker name="Tram Shed Theatre" address="7 Moor Pk Av, Blackpool, Lancashire, FY2 0LT" lng="-3.034974" lat="53.845938" category="theatre" /> <marker name="Thornton Little Theatre" address="Fleetwood Road North, Thornton Cleveleys, FY5 3SZ" lng="-3.010607" lat="53.872058" category="theatre" /> <marker name="Barbara Jackson Arts" address="Rossall La, Fleetwood, Lancashire, FY7 8JP" lng="-3.033960" lat="53.897928" category="theatre" /> <marker name="North Shore Golf Club" address="Devonshire Rd, Blackpool, Lancashire, FY2 0RD" lng="-3.043305" lat="53.839898" category="golf" /> <marker name="St Annes Old Links" address="Highbury Road East, Lytham St. Annes, Lancashire, FY8 2LD" lng="-3.038407" lat="53.762917" category="golf" /> <marker name="Fairhaven Golf Club" address="Oakwood Av, Lytham St. Annes, Lancashire, FY8 4JU" lng="-2.983218" lat="53.742781" category="golf" /> <marker name="Green Drive Golf Club" address="Ballam Rd, Lytham St. Annes, Lancashire, FY8 4LE" lng="-2.959530" lat="53.745971" category="golf" /> <marker name="Fleetwood Golf Club" address="Princes Wy, Fleetwood, Lancashire, FY7 8AF" lng="-3.042973" lat="53.917606" category="golf" /> <marker name="Knott End Golf Club" address="Wyre Side, Knott End-on-Sea, Poulton-le-Fylde, Lancashire, FY6 0AA" lng="-2.997062" lat="53.923200" category="golf" /> <marker name="Tourist Information 1" address="1 Clifton St, Blackpool, Lancashire, FY1 1LY" lng="-3.054529" lat="53.818775" category="info" /> <marker name="Tourist Information 2" address="Thornton-Cleveleys, Lancashire, FY5 1WA" lng="-3.042989" lat="53.876079" category="info" /> <marker name="Tourist Information 3" address="Victoria Rd West, Thornton-Cleveleys, Lancashire, FY5 1AJ" lng="-3.041668" lat="53.877403" category="info" /> <marker name="Tourist Information 4" address="St. Annes Rd West, Lytham St. Annes, Lancashire, FY8 1SA" lng="-3.031074" lat="53.752122" category="info" /> <marker name="Tourist Information 5" address="The Esplanade, Fleetwood, Lancashire, FY7 6DL" lng="-3.006366" lat="53.926970" category="info" /> <marker name="Tourist Information 6" address="10-12 York St, Blackpool, Lancashire, FY1 5AQ" lng="-3.052919" lat="53.810556" category="info" /></markers>';
function xmlParse(str) {
if (typeof ActiveXObject != 'undefined' && typeof GetObject != 'undefined') {
var doc = new ActiveXObject('Microsoft.XMLDOM');
doc.loadXML(str);
return doc;
}
if (typeof DOMParser != 'undefined') {
return (new DOMParser()).parseFromString(str, 'text/xml');
}
return createElement('div', null);
}
html,
body {
height: 100%;
}
<script src="http://maps.google.com/maps/api/js"></script>
<table border=1>
<tr>
<td>
<div id="map" style="width: 550px; height: 450px"></div>
</td>
<td valign="top" style="width:150px; text-decoration: underline; color: #4444ff;">
<div id="side_bar"></div>
</td>
</tr>
</table>
<form action="#">
Theatres:
<input type="checkbox" id="theatrebox" onclick="boxclick(this,'theatre')" /> Golf Courses:
<input type="checkbox" id="golfbox" onclick="boxclick(this,'golf')" /> Tourist Information:
<input type="checkbox" id="infobox" onclick="boxclick(this,'info')" />
<br />
</form>
這指出了我在正確的方向。乾杯! – Fraser