[OpenLayers-Users] Re: OpenLayers.Layer.Vector shifted in
IE9compatibility mode
Ricardo Bayley
ricardo.bayley at gmail.com
Thu Apr 26 14:06:18 EDT 2012
Hi Donald,
Thanks for such a thorough reply.
I am not labeling the features, I am just using a external graphics.
As said before, if I dont, and use only the default style, then it renders
fine.
I dont know if the external graphics has the same behaviour you mention
with labels.
Is this so ?
Best regards, and again, thanks for your explanation.
Ricardo
2012/4/26 Donald Kerr <donald.kerr at dkerr.co.uk>
> Having done a good bit of research into labeling in Internet Explorer,
> principly with trying to get label outlines working, I can confirm that
> there are quite significant differences between the VML rendered in
> Internet
> Explorer when compared to Canvas or SVG in both Chrome and Firefox;
> certainly more than one pixel. I'm assuming that the issues you have are
> related to VML and Internet Explorer and are therefore similar to the
> issues
> I have experienced.
>
> An example that allows various label alignments is available here:
> https://github.com/openlayers/openlayers/issues/366#issuecomment-4824401
>
> By changing the querystring, different renderers can be tested in various
> browsers showing the position differences.
>
> VML in Internet Explorer is not only different in terms of label
> positioning
> (not that critical for me), but it's so slow that renderening any more than
> a few tens of features can result in a map page becoming quite unusable
> from
> a user experience point of view.
>
> I have to admit that I have not tried IE9 and its SVG engine though I have
> spoken to people who say that it is also quite slow. As for positioning, it
> has to be better than IE8 and VML.
>
> Microsoft will support IE8 and XP up to 2020 which means that there will be
> no rush for corporations to change to IE9 which cannot be installed in XP.
> Their VML flavour is deprecated and there will be no further development.
> This leaves me, and others, with serious problems when developing vector
> layers and labeling.
>
> If you are in a position to install and use Google Chrome Frame (GCF), this
> effectively takes over the rendering of the page and has a fast javascript
> engine with rendering in SVG. I have some very good results using this
> within an internal intranet where there is control over the user's browser.
> If you're developing for the wider community the you'll simply have to
> compromise and ensure that your code makes adjustments based on which
> renderer is being used in the various browsers. I certainly cannot find
> another way around it.
>
> I hope this helps.
>
> Regards,
>
> Donald
>
>
>
> -----Original Message-----
> From: openlayers-users-bounces at lists.osgeo.org
> [mailto:openlayers-users-bounces at lists.osgeo.org] On Behalf Of Andreas
> Hocevar
> Sent: 26 April 2012 17:36
> To: Ricardo Bayley
> Cc: openlayers-users at lists.osgeo.org
> Subject: Re: [OpenLayers-Users] Re: OpenLayers.Layer.Vector shifted in
> IE9compatibility mode
>
>
> Is the shift about 1 pixel or more?
>
> Andreas.
>
> On Thu, Apr 26, 2012 at 10:35 AM, Ricardo Bayley <ricardo.bayley at gmail.com
> >
> wrote:
> > Ok, but it also happens with IE6. Yet to try IE7 and 8.
> >
> >
> > 2012/4/25 Andreas Hocevar <ahocevar at opengeo.org>
> >>
> >> Probably not the answer you want to hear, but don't use compatibility
> >> mode. In standards mode, everything will work fine using the SVG
> >> renderer.
> >>
> >> Andreas.
> >>
> >> On Apr 25, 2012 1:07 PM, "Ricardo Bayley" <ricardo.bayley at gmail.com>
> >> wrote:
> >>>
> >>> I checked if styling has anything to do with it.
> >>> If I dont set any styling, leave default style, then features get
> >>> rendered properly.
> >>>
> >>> this is the styl I use
> >>>
> >>> var style = function(){
> >>> var defaultStyle = new OpenLayers.Style({
> >>> cursor:"pointer",
> >>> graphicHeight: "14" ,
> >>> graphicWidth : "14",
> >>> externalGraphic: "imgs/panoramio-marker.png",
> >>> graphicZIndex: 999
> >>> }),
> >>> selectStyle = new OpenLayers.Style({
> >>> graphicZIndex: 1001,
> >>> graphicHeight: "22",
> >>> graphicWidth : "22"
> >>> }),
> >>> myStyle = new OpenLayers.StyleMap({
> >>> 'default': defaultStyle,
> >>> 'select': selectStyle
> >>> });
> >>> return myStyle;
> >>> };
> >>>
> >>> app.panoramio.layer.styleMap = style();
> >>>
> >>> FYI: panoramio-marker.png is a 18px X 18px png file.
> >>>
> >>>
> >>> Any ideas ?
> >>>
> >>>
> >>> ricardo
> >>>
> >>>
> >>>
> >>> 2012/4/25 Ricardo Bayley <ricardo.bayley at gmail.com>
> >>>>
> >>>> Hi everyone,
> >>>>
> >>>> I am trying to load Panoramios pictures. It works great on every
> >>>> browser but in IE6, 7, 8 and IE9 compatibility mode features are
> >>>> not place properly. Location is shifted. If I select any feature
> >>>> and show the popup, then popup is shown in the correct X,Y
> >>>> location.
> >>>>
> >>>> This is the code I user to load panoramios json to the
> >>>> OpenLayers.Layer.Vector class
> >>>>
> >>>> var lyr = app.panoramio.layer, photo, feature, GeoJSON =
> >>>> {"type":"FeatureCollection","total":data.photos.length,"features":[
> >>>> ]};
> >>>> for(i=0; i < data.photos.length; i++){
> >>>> photo = data.photos[i];
> >>>>
> >>>> if(lyr.getFeaturesByAttribute("photo_id",photo.photo_id).length===0
> >>>> ){
> >>>> feature =
> >>>>
>
> {"type":"Feature","geometry":{"type":"Point","coordinates":[photo.longitude,
> >>>> photo.latitude]},"properties":photo};
> >>>> GeoJSON.features.push(feature);
> >>>> }
> >>>> };
> >>>>
> >>>> // Reproject
> >>>> var format = new OpenLayers.Format.GeoJSON({
> >>>> 'internalProjection': new
> >>>> OpenLayers.Projection('EPSG:900913'),
> >>>> 'externalProjection': new OpenLayers.Projection('EPSG:4326')
> >>>> }),
> >>>> f = format.read(GeoJSON);
> >>>> lyr.addFeatures(f);
> >>>>
> >>>> Any ideas why is this happening ? Is there a workaround ? What I
> >>>> dont understand is I have other GeoJSON vector layers which load
> >>>> correctly in every browser. Could this have anything to do with
> >>>> styling ?
> >>>>
> >>>>
> >>>> best regards,
> >>>>
> >>>>
> >>>> Ricardo
> >>>
> >>>
> >>>
> >>> _______________________________________________
> >>> Users mailing list
> >>> Users at lists.osgeo.org
> >>> http://lists.osgeo.org/mailman/listinfo/openlayers-users
> >>>
> >
>
>
>
> --
> Andreas Hocevar
> OpenGeo - http://opengeo.org/
> Expert service straight from the developers.
> _______________________________________________
> Users mailing list
> Users at lists.osgeo.org
> http://lists.osgeo.org/mailman/listinfo/openlayers-users
>
>
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