Bug in ArcGIS API for Flex InfoWindow Workaround

Update:  I’ve added examples for ArcGIS Viewer API for Flex 2.4 and 2.3.1 at the bottom of this post

I’m a big fan of the new PopUpRenderer and ability to use popups on an ArcGISDynamicMapServiceLayer with little code. They’re especially nice when working within an ArcGIS Viewer for Flex app as they’re so configurable. However, I’ve discovered one wrinkle though. The layer does not clear the title (infoWindow.label) property, thus retaining any previous title. The default PopUpRenderer does not use the infoWindow.label property. It simply ignores it. Take the following examples.

First, I’ll click on a graphic, a tweet in this case. The tweet content is actually a component instance that is set via map.infoWindowContent. We also set the map.infoWindow.label with the tweet owner.

Next, we click on a feature from an ArcGISDynamicMapServiceLayer which displays the popup using the configured PopUpRenderer. Notice the tweet title is persisted. This is regardless if we close the InfoWindow and click another feature. And this isn’t limited to ArcGISDynamicMapServiceLayers. FeatureLayers are affected too.

The application I’m developing makes heavy use of the map’s InfoWindow class. So, I wanted to resolve this bug with as few lines of code as possible and in one single location if possible.

Here’s what I did. Once the map is initialized, I add a listener to its infoWindow.content property. Since the InfoWindow only exposes the close event, I had to use a ChangeWatcher to keep an eye on the content property.

// Edits to fix bug in InfoWindow/PopUpRenderer that 

//does not clear out InfoWindow.label property

ChangeWatcher.watch(map.infoWindow, "content",

                     infoWindowContentChangeHandler);

When the content property changes I check to see if the content is of type PopUpRenderer. Because the PopUpRenderer does not use the InfoWindow.label property, I clear it.

private function infoWindowContentChangeHandler(event:Event):void

{

  if(map.infoWindow.content is PopUpRenderer)

  {

    map.infoWindow.label = "";

  }

}

Fixed. Though now we have the added hassle of remembering to tote this along to future projects until Esri addresses it.

Update:  ArcGIS Viewer API for Flex 2.3.1 and 2.4 

Insert code into the MapManager.mxml file

2.4 -

At 2.4, insert code into the existing method this_creationCompleteHandler and add additional handler as follows:

private function this_creationCompleteHandler():void
{
existing esri code…
…
… then

// Edits to fix bug in InfoWindow/PopUpRenderer that
// does not clear out InfoWindow.label property
// This is more of a defensive move!
ChangeWatcher.watch(map.infoWindow, “content”, infoWindowContentChangeHandler);
}

private function infoWindowContentChangeHandler(event:Event):void
{
map.infoWindow.label = “”;
}

2.3.1 -

At 2.3.1, insert code into the existing method init and add additional handler as follows:

private function init():void
{
existing esri code…
…
… then

// Edits to fix bug in InfoWindow/PopUpRenderer that
// does not clear out InfoWindow.label property
// This is more of a defensive move!
ChangeWatcher.watch(map.infoWindow, “content”, infoWindowContentChangeHandler);
}

private function infoWindowContentChangeHandler(event:Event):void
{
map.infoWindow.label = “”;
}

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