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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 Hover Handler Example</title>
- <link rel="stylesheet" href="../theme/default/style.css" type="text/css">
- <link rel="stylesheet" href="style.css" type="text/css">
- <style type="text/css">
- #map {
- width: 340px;
- height: 170px;
- border: 1px solid gray;
- }
- #west {
- width: 350px;
- }
- #east {
- position: absolute;
- left: 370px;
- top: 3em;
- }
-
- table td {
- text-align: center;
- margin: 0;
- border: 1px solid gray;
- }
- textarea.output {
- text-align: left;
- font-size: 0.9em;
- width: 250px;
- height: 65px;
- overflow: auto;
- }
- </style>
- <script src="../lib/Firebug/firebug.js"></script>
- <script src="../lib/OpenLayers.js"></script>
- <script type="text/javascript">
-
- OpenLayers.Control.Hover = OpenLayers.Class(OpenLayers.Control, {
- defaultHandlerOptions: {
- 'delay': 500,
- 'pixelTolerance': null,
- 'stopMove': false
- },
-
- initialize: function(options) {
- this.handlerOptions = OpenLayers.Util.extend(
- {}, this.defaultHandlerOptions
- );
- OpenLayers.Control.prototype.initialize.apply(
- this, arguments
- );
- this.handler = new OpenLayers.Handler.Hover(
- this,
- {'pause': this.onPause, 'move': this.onMove},
- this.handlerOptions
- );
- },
-
- onPause: function(evt) {
- var output = document.getElementById(this.key + 'Output');
- var msg = 'pause ' + evt.xy;
- output.value = output.value + msg + "\r\n";
- },
-
- onMove: function(evt) {
- // if this control sent an Ajax request (e.g. GetFeatureInfo) when
- // the mouse pauses the onMove callback could be used to abort that
- // request.
- }
- });
-
- var map, controls;
-
- function init(){
-
- map = new OpenLayers.Map('map');
- var layer = new OpenLayers.Layer.WMS(
- 'OpenLayers WMS',
- 'http://vmap0.tiles.osgeo.org/wms/vmap0',
- {layers: 'basic'}
- );
- map.addLayers([layer]);
-
- controls = {
- 'long': new OpenLayers.Control.Hover({
- handlerOptions: {
- 'delay': 2000
- }
- }),
- 'short': new OpenLayers.Control.Hover({
- handlerOptions: {
- 'delay': 100
- }
- }),
- 'tolerant': new OpenLayers.Control.Hover({
- handlerOptions: {
- 'delay': 1000,
- 'pixelTolerance': 6
- }
- }),
- 'untolerant': new OpenLayers.Control.Hover({
- handlerOptions: {
- 'delay': 1000,
- 'pixelTolerance': 1
- }
- }),
- 'stoppropag': new OpenLayers.Control.Hover({
- handlerOptions: {
- 'stopMove': true
- }
- })
- };
-
- var props = document.getElementById("props");
- var control;
- for(var key in controls) {
- control = controls[key];
- // only to route output here
- control.key = key;
- map.addControl(control);
- }
-
- map.addControl(new OpenLayers.Control.MousePosition());
- map.zoomToMaxExtent();
- }
-
- function toggle(key) {
- var control = controls[key];
- if(control.active) {
- control.deactivate();
- } else {
- control.activate();
- }
- var status = document.getElementById(key + "Status");
- status.innerHTML = control.active ? "on" : "off";
- var output = document.getElementById(key + "Output");
- output.value = "";
- }
- </script>
- </head>
- <body onload="init()">
- <h1 id="title">Hover Handler Example</h1>
- <div id="west">
-
- <div id="tags">
- hover, onmouseover, handler, listener, event, events
- </div>
-
- <p id="shortdesc">
- This example shows the use of the hover handler.
- </p>
-
- <div id="map" class="smallmap"></div>
- <p>
- The hover handler is to be used to emulate mouseovers on
- objects on the map that aren't DOM elements. For example
- one can use the hover hander to send WMS/GetFeatureInfo
- requests as the user moves the mouse over the map.
- </p>
- <p>
- The "delay" option specifies the number of milliseconds
- before the event is considered a hover. Default is 500
- milliseconds.
- </p>
- <p>
- The "pixelTolerance" option specifies the maximum number
- of pixels between mousemoves for an event to be
- considered a hover. Default is null, which means no
- pixel tolerance.
- </p>
- <p>
- The "stopMove" option specifies whether other mousemove
- listeners registered before the hover handler listener must
- be notified on mousemoves or not. Default is false (meaning
- that the other mousemove listeners will be notified on
- mousemove).
- </p>
- </div>
- <div id="east">
- <table>
- <caption>Controls with hover handlers (toggle on/off to clear output)</caption>
- <tbody>
- <tr>
- <td>long delay (2 sec)</td>
- <td><button id="longStatus" onclick="toggle('long')">off</button></td>
- <td><textarea class="output" id="longOutput"></textarea></td>
- </tr>
- <tr>
- <td>short delay (100 msec)</td>
- <td><button id="shortStatus" onclick="toggle('short')">off</button></td>
- <td><textarea class="output" id="shortOutput"></textarea></td>
- </tr>
- <tr>
- <td>tolerant (6 pixels)</td>
- <td><button id="tolerantStatus" onclick="toggle('tolerant')">off</button></td>
- <td><textarea class="output" id="tolerantOutput"></textarea></td>
- </tr>
- <tr>
- <td>untolerant (1 pixel)</td>
- <td><button id="untolerantStatus" onclick="toggle('untolerant')">off</button></td>
- <td><textarea class="output" id="untolerantOutput"></textarea></td>
- </tr>
- <tr>
- <td>stop propagation</td>
- <td><button id="stoppropagStatus" onclick="toggle('stoppropag')">off</button></td>
- <td><textarea class="output" id="stoppropagOutput"></textarea></td>
- </tr>
- </tbody>
- </table>
- </div>
- </body>
-</html>