Sets or retrieves the width of the grid column.
var value = obj.getColumnWidth();
obj.setColumnWidth(value);
obj.onColumnWidthChanging = function(value){...};
obj.onColumnWidthChanged = function(value){...};
obj.onColumnWidthError = function(value){...};
obj.setColumnWidth(200, 0); // set column-0 width to 200px
setColumnWidth() does not work if given an array of widths, i.e. setColumnWidth([40, 100, 30]) won't work in 2.0.0, you should set values one by one.
It is also possible using CSS rules to specify the width and other visual parameters of the grid columns.
<style>
#myGrid .aw-column-0 {width: 80px;}
#myGrid .aw-column-1 {width: 200px;}
#myGrid .aw-column-2 {text-align: right;}
#myGrid .aw-column-3 {text-align: right;}
#myGrid .aw-column-4 {text-align: right;}
</style>