How to decrement the quantity in a specific row while clicking-CodePudding

I have a problem in my code while clicking the selected row the quantity reset to 1

I want to decrement it by 1 and also when the quantity hits the minimum value the selected row will be removed.

BTW I'm using AbstractTableModel to manage my data.

private void OrderListMouseClicked(java.awt.event.MouseEvent evt) {
    OrderTableModel model = (OrderTableModel) OrderList.getModel();
    Order order = new Order();
    int row = OrderList.getSelectedRow();
    int currentqty = (int) (model.getValueAt(row, 2));
    order =  model.getOrderAt(row);
    for (int i=currentqty - 1; i>=1; i--){
        currentqty = i;
    }
    order.setQuanity(currentqty);
    model.update(order);

CodePudding user response：

In your click handler, you just need to decrement the value by one (instead of looping until it is 1) and if it hits the minimum we need to call a function to remove the row in the Model:

private void OrderListMouseClicked(java.awt.event.MouseEvent evt) {                                       
    OrderTableModel model = (OrderTableModel) OrderList.getModel();
    Order order = new Order();
    int row = OrderList.getSelectedRow();
    int currentqty = (int) (model.getValueAt(row, 2));
    
    order =  model.getOrderAt(row);
    // decrement current quantity by one
    currentqty--;
    // if current quantity has hit the minimum? - i assumed 0 would be the number where you want to remove the row
    if (currentqty <= 0) {
        model.removeRowAt(row);
    } else {
        order.setQuanity(currentqty);
        model.update(order);
    }
}

In your class OrderTableModel you have to add this function for the remove to work:

public void removeRowAt(int row) {
    filters.remove(row);
    fireTableRowsDeleted(row, row);
}

As these are only code snippets I was not able to run & test the code, but it should work.