GeoExt 2.1.0 is built atop OpenLayers 2.13.1 and ExtJS 5.1.0 and provides full backward compatibility to ExtJS 4.2.1. So GeoExt 2.1 is usable either with ExtJS 5.1 or Ext 4.2.1. GeoExt 2.0.x is based on OpenLayers 2.13.1 and ExtJS 4.2.1 and is maintained in the v2.0.x-maintenance Branch.
Since version 2.1.0, GeoExt is based upon ExtJS 4 and ExtJS 5.
This means GeoExt can be used just like any other Ext 4/5 component, and applications making use of GeoExt 2.1 also profit from Ext JS enhancements like charting, a harmonized API with Sencha Touch, support for the MVVM-Pattern, 2-way-binding and a sophisticated single-file build tool.
The current released version of GeoExt is 2.1.0.
Please download GeoExt 2.1.0, use it, and give feedback. Thanks!
A GeoExt.Action is created to insert an OpenLayers control in a toolbar as a button or in a menu as a menu item.
A popup is a specialized window that supports anchoring to a particular location in a MapPanel.
How to create a printable PDF with GeoExt.data.MapfishPrintProvider and GeoExt.PrintMapPanel.
The FeatureRenderer renderers arbitrary OpenLayers.Feature.Vector objects given a list of symbolizers.
Of course you can still use GeoExt 1.x.
We will still be fixing bugs in the 1.x-series, but our development will mainly focus on GeoExt 2 and above.
Consider using the new and shiny GeoExt 2 when you decide to refactor your code or start a new project. As we strived for a very harmonized API between GeoExt 1 and 2, upgrading shouldn't be too hard.