Optimized WFS-T example

This example shows how to modify and delete features available through WMS and WFS-T, whith minimum overload on server.

• When just viewing, OpenLayers works with WMS layer.
• Modifying
  • When you click on the 'Modify' button and select a feature from the map by clicking on it, OpenLayers will retrieve only that feature using the getFeature from WFS protocol (and thanks to the OpenLayers.Protocol.WFS.fromWMSLayer protocol).
  • If at any time you want to cancel the modification, just click the 'Cancel' button (I know, non-sense icon, sorry about that)
  • When you click on the 'Save' button, the feature is saved remotely through the WFS-T protocol, and again only the modified feature is sent in the request.
• Deleting
  • When you click on the 'Delete' button and select the feature you want to delete, again, only the feature you want to delete will be retrieved.
  • If you confirm the dialog, a wfs:delete transaction will be sent to the server, including, again, only the featureId of the deleted feature.