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-<!DOCTYPE html>
-<html>
- <head>
- <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
- <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=0">
- <meta name="apple-mobile-web-app-capable" content="yes">
- <title>OpenLayers Event Handling</title>
- <link rel="stylesheet" href="style.css" type="text/css">
- <style type="text/css">
- #panel {
- margin: 5px;
- height: 30px;
- width: 200px;
- }
- #panel div {
- float: left;
- margin-left: 5px;
- width: 25px;
- height: 25px;
- border: 1px solid gray;
- }
- #output {
- position: absolute;
- left: 550px;
- top: 4em;
- width: 350px;
- height: 400px;
- }
- div.blueItemInactive {
- background-color: #aac;
- }
- div.blueItemActive {
- background-color: #33c;
- }
- div.orangeItemInactive {
- background-color: #ca6;
- }
- div.orangeItemActive {
- background-color: #ea0;
- }
- div.greenItemInactive {
- background-color: #aca;
- }
- div.greenItemActive {
- background-color: #3c3;
- }
-
- </style>
- <script src="../lib/OpenLayers.js"></script>
- <script type="text/javascript">
- var map, panel;
-
- function init(){
-
- // define custom map event listeners
- function mapEvent(event) {
- log(event.type);
- }
- function mapBaseLayerChanged(event) {
- log(event.type + " " + event.layer.name);
- }
- function mapLayerChanged(event) {
- log(event.type + " " + event.layer.name + " " + event.property);
- }
- map = new OpenLayers.Map('map', {
- eventListeners: {
- "moveend": mapEvent,
- "zoomend": mapEvent,
- "changelayer": mapLayerChanged,
- "changebaselayer": mapBaseLayerChanged
- }
- });
-
- panel = new OpenLayers.Control.Panel(
- {div: document.getElementById("panel")}
- );
-
- // define custom event listeners
- function toolActivate(event) {
- log("activate " + event.object.displayClass);
- }
- function toolDeactivate(event) {
- log("deactivate " + event.object.displayClass);
- }
-
- // Multiple objects can share listeners with the same scope
- var toolListeners = {
- "activate": toolActivate,
- "deactivate": toolDeactivate
- };
- var blue = new OpenLayers.Control({
- type: OpenLayers.Control.TYPE_TOGGLE,
- eventListeners: toolListeners,
- displayClass: "blue"
- });
- var orange = new OpenLayers.Control({
- type: OpenLayers.Control.TYPE_TOGGLE,
- eventListeners: toolListeners,
- displayClass: "orange"
- });
- var green = new OpenLayers.Control({
- type: OpenLayers.Control.TYPE_TOGGLE,
- eventListeners: toolListeners,
- displayClass: "green"
- });
-
- // add buttons to a panel
- panel.addControls([blue, orange, green]);
- map.addControl(panel);
-
- var vmap = new OpenLayers.Layer.WMS(
- "OpenLayers WMS",
- "http://vmap0.tiles.osgeo.org/wms/vmap0",
- {layers: 'basic'}
- );
- var landsat = new OpenLayers.Layer.WMS(
- "NASA Global Mosaic",
- "http://t1.hypercube.telascience.org/cgi-bin/landsat7",
- {layers: "landsat7"}
- );
- var nexrad = new OpenLayers.Layer.WMS(
- "Nexrad",
- "http://mesonet.agron.iastate.edu/cgi-bin/wms/nexrad/n0r.cgi",
- {layers:"nexrad-n0r-wmst", transparent: "TRUE", format: 'image/png'},
- {isBaseLayer: false}
- );
-
-
- map.addLayers([vmap, landsat, nexrad]);
- map.addControl(new OpenLayers.Control.LayerSwitcher());
- map.zoomToMaxExtent();
-
- }
- function log(msg) {
- document.getElementById("output").innerHTML += msg + "\n";
- }
- </script>
- </head>
- <body onload="init()">
- <h1 id="title">Event Handling</h1>
-
- <div id="tags">
- event, events, handler, listener, cleanup
- </div>
-
- <p id="shortdesc">
- Demonstrating various styles of event handling in OpenLayers.
- </p>
-
- <div id="map" class="smallmap"></div>
- <div id="panel"></div>
- <textarea id="output"></textarea>
- <div id="docs"></div>
- </body>
-</html>