Allow drag through div positioned over map
I have an openlayers map and I have positioned a div to sit inside/over the map component.
This works fine, however when dragging the map, if the mouse moves through/over the div the drag action is terminated.
How can I avoid the drag action from terminating?
thanks, p.
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<script type="text/javascript" src="http://www.openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/prototype/1.7.0.0/prototype.js"></script>
</head>
<body>
<div id="map" style="margin:0px; width:300px; height:200px;"></div>
<div id="overlay" style="position:absolute; width:10开发者_StackOverflow中文版0px; height:75px; border:1px solid red; background-color:white; z-index:5000; text-align:center;">I want to drag through this</div>
<script type="text/javascript">
// create map
var map = new OpenLayers.Map("map", {"maxResolution":0.703125});
map.addLayers([new OpenLayers.Layer.WMS("World Map", "http://labs.metacarta.com/wms-c/Basic.py?", {layers:"basic", format:"image/png"})]);
map.zoomToMaxExtent();
// put div over map
Position.clone($("map"), $("overlay"), {offsetLeft:100, offsetTop:62.5, setWidth:false, setHeight:false});
</script>
</body>
</html>
EDIT: solution using accepted answer:
<div class="mapDragThrough">some content which gets positioned over the map</div>
initialise: function()
{
this.map.events.register("movestart", this, this.applyDragThrough);
this.map.events.register("moveend", this, this.applyDragThrough);
},
applyDragThrough: function(event)
{
var elements = Element.select(document.body, ".mapDragThrough");
var value = this.map.dragging ? "none" : "auto";
elements.invoke("setStyle", {"pointerEvents":value});
},
You can set pointer-events css attributes of the overlay DIV to none.
This causes the element not to receive mouse events at all, allowing the map dragging to continue uninterrupted.
Here's a working example:
<html>
<head>
<script type="text/javascript" src="http://www.openlayers.org/api/OpenLayers.js"></script>
<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/prototype/1.7.0.0/prototype.js"></script>
</head>
<body>
<div id="map" style="margin:0px; width:300px; height:200px;"></div>
<div id="overlay" style="position:absolute; width:100px; height:75px; border:1px solid red; background-color:white; z-index:5000; text-align:center;">I want to drag through this</div>
<script type="text/javascript">
// create map
var map = new OpenLayers.Map("map", {"maxResolution":0.703125});
map.addLayers([new OpenLayers.Layer.WMS("World Map", "http://labs.metacarta.com/wms-c/Basic.py?", {layers:"basic", format:"image/png"})]);
map.zoomToMaxExtent();
// put div over map
Position.clone($("map"), $("overlay").setStyle({'pointerEvents': 'none'}), {offsetLeft:100, offsetTop:62.5, setWidth:false, setHeight:false});
</script>
</body>
</html>
A possible solution could be to listen to hover event with jQuery and activate/deactivate Navigation control(or you probably are using MouseDefaults which you shouldn't) accordingly. The code should look something like this:
var nav = map.getControlsByClass("OpenLayers.Control.Navigation")[0];
$("#your-overlay-div").hover(function(){
nav.deactivate();
},function(){
nav.activate();
});
加载中,请稍侯......
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