renderer: function(sprite, record, attr, index, store) {
var color = selectedColor;
if (unique condition to identify the column ) {
return Ext.apply(attr, {
fill: color,
width: 100,x:50,y:50
});
}
else(another condition) {
return Ext.apply(attr, {
fill: color
,width: 50,
});
}
},
you can use record or index or store to identify the column being rendered