Google maps in firefox6 zooms znd scrolls page
I have problem with Firefox6 (don't know if it also concerns earlier versions).
I want to embed Google Map on page, and when page has scrollbars (is longer than viewport) mouse wheel not only zooms map but also scrolls page. I tried to catch mousewheel event and stop propagation but this event isn catchable when cursor os over map. When cursor is over map controls (zoom control, google logo, etc) i can catch event and stop propagation.
What is more strange it not happens always. Sometimes page srolls and after few 开发者_运维知识库scrolls it stops and mousewheel only zooms map (as expected). Sometimes page doesn't scroll and sometimes it scrolls with zoom all the time. Can't find pattern.
Source code is simple:
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<title>test</title>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
<script type="text/javascript">
window.onload = function(){
var latlng = new google.maps.LatLng(52.25, 21.01);
mapOptions = {
zoom: 12,
center: latlng,
mapTypeId: google.maps.MapTypeId.ROADMAP,
streetViewControl: false,
zoomControl:true,
mapTypeControl:false
};
map = new google.maps.Map(document.getElementById("map_canvas"), mapOptions);
}
</script>
</head>
<body>
<p style="height:500px;">-lot of text-</p>
<div id="map_canvas" style="width:500px; height:500px;"></div>
<p style="height:500px;">-lot of text-</p>
</body>
</html>
Your problem is also described on code.google.com, this problem is only in Firefox, but it isn't a Firefox bug:
http://code.google.com/p/gmaps-api-issues/issues/detail?id=3652 http://code.google.com/p/gmaps-api-issues/issues/detail?id=1605
Have also found out a workaround, that is not re-scrolling or re-zooming and works fine:
A new ScrollInterceptOverlay derived from google.maps.OverlayView, prepending a div on MapPanes.overlayMouseTarget:
Version with jQuery
// Ensure to have google.maps loaded:
// var gmap = new google.maps.Map($googlemap[0], mapOptions);
// Define a ScrollInterceptOverlay function
var ScrollInterceptOverlay = function (gmap) {
if (!(this instanceof ScrollInterceptOverlay)) return;
var $div;
var $mapDiv;
var initialize = function () {
$div = $('<div />').css({
position: 'absolute', top: 0, left: 0,
display: 'inline-block'
});
var div = $div[0];
if (div && div.addEventListener) {
// Internet Explorer, Opera, Google Chrome and Safari
div.addEventListener("mousewheel", mouseScrollStop);
// Firefox
div.addEventListener("DOMMouseScroll", mouseScrollStop);
div.addEventListener("MozMousePixelScroll", mouseScrollStop);
}
else if (div && div.attachEvent) { // IE before version 9
div.attachEvent("onmousewheel", mouseScrollStop);
}
this.setMap(gmap);
};
var mouseScrollStop = function (e) {
if (e && e.preventDefault) e.preventDefault();
};
this.onAdd = function () {
$div.prependTo(this.getPanes().overlayMouseTarget);
};
this.onRemove = function () {
var div = $div[0];
if (div && div.addEventListener) {
// Internet Explorer, Opera, Google Chrome and Safari
div.addEventListener("mousewheel", mouseScrollStop);
// Firefox
div.addEventListener("DOMMouseScroll", mouseScrollStop);
div.addEventListener("MozMousePixelScroll", mouseScrollStop);
}
else if (div && div.attachEvent) { // IE before version 9
div.attachEvent("onmousewheel", mouseScrollStop);
}
$div.detach();
};
this.draw = function () {
if ($mapDiv && $mapDiv.length === 1) {
$div.css({
width: $mapDiv.outerWidth(),
height: $mapDiv.outerHeight()
});
}
};
var base_setMap = this.setMap;
this.setMap = function (map) {
$mapDiv = $(map.getDiv());
base_setMap.call(this, map);
};
initialize.call(this);
};
// Setup prototype as OverlayView object
ScrollInterceptOverlay.prototype = new google.maps.OverlayView();
// Now create a new ScrollInterceptOverlay OverlayView object:
var mapScrollInterceptor = new ScrollInterceptOverlay(gmap);
This workaround is using jQuery, required for calculating outerWidth and outerHeight, but also for better reading.
Version with pure javaScript
Tested live: http://fiddle.jshell.net/fhSMM/7/
// Ensure to have google.maps loaded:
// var gmap = new google.maps.Map(googlemap, mapOptions);
// Define a ScrollInterceptOverlay class function
var ScrollInterceptOverlay = function () {
if (!(this instanceof ScrollInterceptOverlay)) return;
var div;
// private instance function
var mouseScrollStop = function (e) {
if (e && e.preventDefault) e.preventDefault();
};
// public instance function
this.onAdd = function () {
div = document.createElement('div');
div.style.display = 'inline-block';
div.style.position = 'absolute';
div.style.top = div.style.left = 0;
if (div.addEventListener) {
// Internet Explorer, Opera, Google Chrome and Safari
div.addEventListener("mousewheel", mouseScrollStop);
// Firefox
div.addEventListener("DOMMouseScroll", mouseScrollStop);
div.addEventListener("MozMousePixelScroll", mouseScrollStop);
}
else if (div.attachEvent) { // IE before version 9
div.attachEvent("onmousewheel", mouseScrollStop);
}
var pane = this.getPanes().overlayMouseTarget;
var firstChild = pane.firstChild;
if (!firstChild) {
pane.appendChild(div);
}
else {
pane.insertBefore(div, firstChild);
}
};
// public instance function
this.onRemove = function () {
if (div) {
if (div.removeEventListener) {
// Internet Explorer, Opera, Google Chrome and Safari
div.removeEventListener("mousewheel", mouseScrollStop);
// Firefox
div.removeEventListener("DOMMouseScroll", mouseScrollStop);
div.removeEventListener("MozMousePixelScroll", mouseScrollStop);
}
else if (div.detachEvent) { // IE before version 9
div.detachEvent("onmousewheel", mouseScrollStop);
}
var parent = div.parentNode;
parent.removeChild(div);
}
// do not delete div var'iable
div = undefined;
};
// public instance function
this.draw = function () {
var map = this.getMap();
if (map) {
var mapDiv = map.getDiv();
if (mapDiv) {
var rect = mapDiv.getBoundingClientRect();
div.style.width = rect.width + 'px';
div.style.height = rect.height + 'px';
}
}
};
};
// Setup prototype as OverlayView object
ScrollInterceptOverlay.prototype = new google.maps.OverlayView();
// Now create a new ScrollInterceptOverlay OverlayView object:
var mapScrollInterceptor = new ScrollInterceptOverlay();
mapScrollInterceptor.setMap(gmap);
Please visit also http://metadea.de/V/ about what (real) javaScript class functions are, and why I like jQuery :)
Works now for me. Also in Firefox, the map is zooming on mousescroll, but no more scrolling the document.
Edit: Updated support for MozMousePixelScroll, refined jS
For now it looks like firefox bug. Will close question when bug will be fixed.
I had the same issue.
You could try to start Firefox with a brand new profile (e.g. by starting the Profile Manager - executing 'firefox -P' on windows systems - and choosing 'Create...') and see if the problem persists.
I had several old but seemingly empty user profiles lying around in the VMs I used to verify if this was a bug in FF 6 and obviously installing only the new binaries didn't help. On the other hand, creating a blank profile did, so I can only think of this being a migration glitch. If major versions of FF are going to be released on a bi-monthly basis, though, a lot of people are going to suffer from similar issues.
Why not take UI control of zooming? This works well for me.
<!DOCTYPE html>
<html>
<head>
<script src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript" src="http://maps.googleapis.com/maps/api/js?sensor=false"></script>
</head>
<body>
<div class="canvas" style="width:600px;height:400px;"></div>
<script>
// Load event
$(function() {
var myOptions = {
zoom: 8,
center: new google.maps.LatLng(-34.397, 150.644),
mapTypeId: google.maps.MapTypeId.ROADMAP
};
var map = new google.maps.Map($('.canvas')[0], myOptions);
var overlay = new google.maps.OverlayView();
overlay.draw = function() {};
overlay.setMap(map);
// Only a Mozilla bug
if($.browser.mozilla) {
// Wait for the map DOM to be ready
google.maps.event.addListenerOnce(map, 'idle', function() {
$('.canvas > div > div:first-child > div').bind('DOMMouseScroll', function(e) {
// setTimeout needed otherwise the return false has no effect
setTimeout(function() {
// Calculate new center
var offset = $('.canvas').offset();
var pos = overlay.getProjection().fromContainerPixelToLatLng(new google.maps.Point(e.pageX-offset.left, e.pageY-offset.top));
// Calculate new zoom level
var zoom = map.getZoom();
if(e.detail < 0) zoom++;
else if(e.detail > 0) zoom--;
map.setCenter(pos);
map.setZoom(zoom);
}, 1);
// Stop propagation (prevent default)
return false;
});
});
}
});
</script>
<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
</body>
</html>
加载中,请稍侯......
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