On Sep 25, 9:23 am, Tim White <[EMAIL PROTECTED]> wrote:
> We have a GWT app that works with Google Maps using the gwt-maps
> 'official' API.
>
> This app is running in WebLogicPortal. We have a requirement to run
> several copies of the map app, each as a portlet running on the same
> WLP page.
>
> WLP gives each portlet instance on the page a unique identifier. The
> trick is how to get that id into the app, so that you can keep the
> portlet instances separated in terms up updating the map, and doing
> the normal GWT stuff.
OK, So I have this working, and I thought I'd share how I did it, in
case someone else has to in the future.
What I did is append to a .js array at the top of each portlet's JSP.
So each time the map portlet is run on a page, it will add it's WLP
portlet ID to the array.
In the EntryPoint method, I loop over all the portlet ID's and check
to see if the GWT <div> for that portlet instance is populated yet.
If not, I populate it.
The key is that you have to append to the same .js array across all
the portlet instances....
Tim
WLP JSP:
<%
PortletPresentationContext context =
PortletPresentationContext.getPortletPresentationContext(request);
WindowState windowState = context.getWindowState();
if (windowState != null) {
pageContext.setAttribute("portletState",
windowState.getName());
} else {
pageContext.setAttribute("portletState", "normal");
}
String portletInstanceLabel = context.getInstanceLabel();
if (portletInstanceLabel != null) {
pageContext.setAttribute("portletInstanceLabel",
portletInstanceLabel);
} else {
pageContext.setAttribute("portletInstanceLabel", "none");
}
%>
…
<div id="NetworkMapContainer-${portletInstanceLabel}"></div>
…
<script type="text/javascript" language="javascript">
var portalInfo = new Array();
portalInfo['state'] = '${portletState}';
var portletInstanceLabel = '${portletInstanceLabel}';
if ((typeof(mapInstances) == 'undefined')) {
var mapInstances = new Array();
}
mapInstances['${portletInstanceLabel}'] = '$
{portletInstanceLabel}';
</script>
EntryPoint Class:
…
/* Get JavaScript Array of Map Portlet Instances, and
Iterate Over it */
Dictionary mapInstancesDictionary =
Dictionary.getDictionary("mapInstances");
Iterator<String> mapInstancesIterator =
mapInstancesDictionary.keySet().iterator();
String currentMapInstanceKey = "none";
String currentMapInstanceLabel = "none";
while (mapInstancesIterator.hasNext()) {
/* Determine the Name of the Current Portlet Target
Node */
currentMapInstanceKey = mapInstancesIterator.next();
if (!currentMapInstanceKey.equals("remove")) {
currentMapInstanceLabel =
mapInstancesDictionary.get(currentMapInstanceKey);
}
/* If we already added a map to this portlet, exit
*/
RootPanel currentRootPanel =
RootPanel.get("NetworkMapContainer-" + currentMapInstanceLabel);
if (currentRootPanel.getWidgetCount() > 0) {
return;
}
/* Must create a new MapWidget Object, can't use a
final static one */
MapWidget mapWidget = new MapWidget();
…
/* Add the main Panel to the Page */
currentRootPanel.add(mainPanel);
}
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