Re: [Gwt-openlayers-users] WMS shifts to wrong location after zooming/panning

[Wigger T. <but...@ho...>]

Dear all,
Thank you for your help. unfortunately I haven't solved the problem yet. 
- My layout is the following: I have a dockpanel as root, and add an Absolute panel (containing the mapwidget) to the center of the Dockpanel.- I have tried both tiled and single tile layers. No real difference in result. Besides GWT I use smartgwt and incubator libraries. I used them before in other projects where they didn't seem to cause any problems. - In my map I dont believe other divs, like the selection element you mentioned, could cause the WMS div to move. 
Could it help if I send you the link to the application in a private email so you can see what happends? It seems that if I pan the WMS to the top left corner it fits again on the underground (OSM). 
Thanks again,Willem 

> Date: Fri, 4 Mar 2011 09:09:59 -0600
> From: Rol...@no...
> To: gwt...@li...
> Subject: Re: [Gwt-openlayers-users] WMS shifts to wrong location	after	zooming/panning
> 
> Hi,
> 
> On 03/04/2011 02:30 AM, Edwin Commandeur wrote:
> > Are you using plain GWT or some GUI library?
> >
> > It is OpenLayers that calculates these offsets for tiled layers.
> > Apparently it does this in way that does not play nice with GWT. Have
> > you tried untiled (get's the whole map image in one go, versus in
> > several tiles)? Or is that no option for you?
> 
> I have found that problems like this crop up when the div that contains 
> the map moves on the page.  My solution was to connect a function that 
> re-centers the map to events that cause the location of the map div to 
> move on the page.  In our case we add and remove some selection elements 
> above the div pushing it up and down on the page and re-centering the 
> map each time one of those elements was added/removed fixed the problem.
> 
> Roland
> 
> 
>   public void resizeMap() {
>                  // Do a meaningless little calculation to force the map 
> to re-calibrate where it is on the page.
>                  int zoom = map.getZoom();
>                  LonLat center = map.getCenter();
>                  map.setCenter(center, zoom);
>          }
> > Greetings,
> > Edwin
> >
> > On 3 March 2011 23:30, Wigger Tims<but...@ho...>  wrote:
> >> Dear List,
> >> In my web application using gwt-openlayers 0.5 and GWT 2.04 I am
> >> experiencing a rather annoying problem. When I initially load a WMS, it is
> >> visualized without a problem. When I zoom, however, the WMS is shifted, most
> >> of the time to the south east. After every pan/ zoom action the offset is
> >> difference. When I use firebug in firefox I see can see that the DIV that
> >> contains the image has a top and left offset as can be seen below:
> >> <div style="overflow: hidden; position: absolute; z-index: 1; left: 218px;
> >> top: 96px; width: 1004px; height: 496px;"><img id="OpenLayersDiv499"
> >> style="width: 1004px; height: 496px; position: relative;"
> >> class="olTileImage"
> >> src="xxxxxx/deegree/services?FORMAT=image%2Fpng&amp;TRANSPARENT=TRUE&amp;LAYERS=Lakes%20Rwanda&amp;SERVICE=WMS&amp;VERSION=1.1.1&amp;REQUEST=GetMap&amp;STYLES=&amp;EXCEPTIONS=application%2Fvnd.ogc.se_inimage&amp;SRS=EPSG%3A900913&amp;_OLSALT=0.7358005342568256&amp;BBOX=3186029.3265993,-283703.63671876,3493000.4269411,-132052.57519532&amp;WIDTH=1004&amp;HEIGHT=496"></div>
> >> The image that is returned by Deegree is fine by the way.
> >> Does anyone have an idea what is going wrong and what I can do to solve it?
> >> Thanks in advance!
> >> Best,
> >> Willem
> >>
> >>
> >> ------------------------------------------------------------------------------
> >> What You Don't Know About Data Connectivity CAN Hurt You
> >> This paper provides an overview of data connectivity, details
> >> its effect on application quality, and explores various alternative
> >> solutions. http://p.sf.net/sfu/progress-d2d
> >> _______________________________________________
> >> Gwt-openlayers-users mailing list
> >> Gwt...@li...
> >> https://lists.sourceforge.net/lists/listinfo/gwt-openlayers-users
> >>
> >>
> > ------------------------------------------------------------------------------
> > What You Don't Know About Data Connectivity CAN Hurt You
> > This paper provides an overview of data connectivity, details
> > its effect on application quality, and explores various alternative
> > solutions. http://p.sf.net/sfu/progress-d2d
> > _______________________________________________
> > Gwt-openlayers-users mailing list
> > Gwt...@li...
> > https://lists.sourceforge.net/lists/listinfo/gwt-openlayers-users
> 
> 
> ------------------------------------------------------------------------------
> What You Don't Know About Data Connectivity CAN Hurt You
> This paper provides an overview of data connectivity, details
> its effect on application quality, and explores various alternative
> solutions. http://p.sf.net/sfu/progress-d2d
> _______________________________________________
> Gwt-openlayers-users mailing list
> Gwt...@li...
> https://lists.sourceforge.net/lists/listinfo/gwt-openlayers-users