I have to add toolbar button in the shopping cart item. when user click on the button
system should copy the Value from the First line Item where the Check Boxes are Enabled and paste the values to the corresponding fields of other Line Items, only if the Check Box is enabled in other Line Items.
I have added the button 'update', but i dont know how to update all the line items. becuse when there is a differnce between item button and details of the items.