Here is a useless extension I wrote for fun : Ext.ux.KeySequenceMap. As its name suggests, it’s based on Ext.KeyMap and it handles sequences of keys instead of unique keys.
KeySequenceMap works almost the same way as KeyMap :
It’s the same excepted the key property which is now the sequence property.
Here is the Ext.ux.KeySequenceMap demo page where you can enter cheat codes !
As usual, on Github : Ext.ux.KeySequenceMap under the GPLv3.