I have a grid with a dynamically changing number of columns. I already have a checkbox column. I need to add checkBox to other column headers, only to headers.
Yes. Include Ext.grid.CheckboxSelectionModelas a column when declaring your ColumnModel.
Ext.grid.CheckboxSelectionModel
var colModel = new Ext.grid.ColumnModel({ columns: [ new Ext.grid.CheckboxSelectionModel(), {/* other columns}] });
: , , . / , RECONFIGURE , , /. , ( , ), RECONFIGURE "undefined", .