Show stock of selected item or stop selling out of stock item

This script shows stock of selected item from sales screen and stops selling out of stock item

Administrator Menu > Maintenance > Resources
Below script creates a button on sales screen to to show stock of selected item.
Add the below line Ticket.Buttons:

<button key="button.print" name="stock" code="Script.Stock" shortcut="F9"/>

Create a new resource, Script.Stock, and add the below line:

javax.swing.JOptionPane.showMessageDialog(null, "Stock: " + sales.getStock(ticket.getLine(sales.getSelectedIndex()).getProductID()) + "     " + "Buy Price: " + ticket.getLine(sales.getSelectedIndex()).printPriceBuy());

To stop selling out of stock items, add below lines in event.addline and event.setline

event.addline

if(sales.getStock(line.getProductID())==0 || sales.getStock(line.getProductID())-line.getMultiply()<=0)
{
 javax.swing.JOptionPane.showMessageDialog(null, "There is no stock of this item.");
     return "Cancel";
}

event.setline

if(sales.getStock(line.getProductID())==0 || sales.getStock(line.getProductID())-line.getMultiply()<0)
{
 javax.swing.JOptionPane.showMessageDialog(null, "There is no stock of this item.");
     return "Cancel";
}

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