EXTJS Fiddles (2015) Grid - Generate Fake store with pagination http://jsfiddle.net/prajavk/Ufeyw/ Grid - Reconfigure grids http://jsfiddle.net/prajavk/t2bVJ/ Grid - Load two stores, hide columns, apply state http://jsfiddle.net/prajavk/P7ES5/ Grid - row expander + grouping http://jsfiddle.net/89Ljt/ Grid - load child grid on row expander http://jsfiddle.net/prajavk/9t3JE/ Nested grid with row expander http://jsfiddle.net/prajavk/3TxkA/ Grid - Preselect checkbox grid http://jsfiddle.net/prajavk/97fXp/ Combo - two fieldsearch http://jsfiddle.net/prajavk/7j4uW/ Grid - cell click event loads child grid http://jsfiddle.net/prajavk/5eq3T/ Grid -Action column with checkbox event http://jsfiddle.net/prajavk/ZLmY6/ Ext.Direct simulator- load nested grids http://jsfiddle.net/prajavk/622kF/ Ext.Ajax comet simulator for continous response http://jsfiddle.net/prajavk/3msnf/ Hasone - model http://jsfiddle.net/prajavk/yLLuG/ Grid - simulate live data ...
A foundation you can build.