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Message:

GridBag Layout

Posted by Patrick on August 14, 2001 at 2:52 AM

I am new to java. I want to design an applet consisting of labels and textfields using the gridbag layout. However when I run the applet I am not getting any results so can you please look at the code below and tell me where I am going wrong :

import java.awt.*;
import javax.swing.*;

public class Orders extends JApplet
{
JPanel panel;

JLabel labelOrderNo, labelOrderDate, labelCartID, labelShopperID, labelShipModID,
labelShipCharges, labelGiftWrap, labelGiftWrapCharges, labelOrdProc, labelTotalCost,
labelExpDelDate;
JTextField txtOrderNo, txtOrderDate, txtCartID, txtShopperID, txtShipModID, txtShipCharges,
txtGiftWrapCharges, txtTotalCost, txtExpDelDate;
JRadioButton rY, rN;
JButton btOK, btCancel;
GridBagConstraints gbc;
GridBagLayout gbl;

public void init()
{
JPanel panel;
gbc = new GridBagConstraints();
gbl = new GridBagLayout();
panel = (JPanel)getContentPane();
panel.setLayout(gbl);

labelOrderNo = new JLabel("Order No. ");
labelOrderDate = new JLabel("Order Date");
labelCartID = new JLabel("Cart ID");
labelShopperID = new JLabel(" Shopper ID");
labelShipModID = new JLabel(" Shipping Model ID");
labelShipCharges = new JLabel(" Shipping Charges");
labelGiftWrap = new JLabel(" Gift Wrap Charges");
labelOrdProc = new JLabel(" Order Processed");
labelTotalCost = new JLabel("Total Cost");
labelExpDelDate = new JLabel("Expected Delivery Date");

txtOrderNo = new JTextField(10);
txtOrderDate = new JTextField(10);
txtCartID = new JTextField(10);
txtShopperID = new JTextField(10);
txtShipModID = new JTextField(10);
txtShipCharges = new JTextField(20);
txtGiftWrapCharges = new JTextField(20);

rY = new JRadioButton("Yes");
rN = new JRadioButton("No");

txtTotalCost = new JTextField(20);
txtExpDelDate = new JTextField(20);

btOK = new JButton("OK");
btCancel = new JButton("Cancel");

//ADD CONTROLS TO THE PANEL

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 4;
gbl.setConstraints(labelOrderNo, gbc);
panel.add(labelOrderNo);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 4;
gbl.setConstraints(txtOrderNo, gbc);
panel.add(txtOrderNo);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 6;
gbl.setConstraints(labelCartID, gbc);
panel.add(labelCartID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 6;
gbl.setConstraints(txtCartID, gbc);
panel.add(txtCartID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 9;
gbl.setConstraints(labelShopperID, gbc);
panel.add(labelShopperID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 9;
gbl.setConstraints(txtShopperID, gbc);
panel.add(txtShopperID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 12;
gbl.setConstraints(labelShipModID, gbc);
panel.add(labelShipModID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 12;
gbl.setConstraints(txtShipModID, gbc);
panel.add(txtShipModID);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 15;
gbl.setConstraints(labelShipCharges, gbc);
panel.add(labelShipCharges);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 15;
gbl.setConstraints(txtShipCharges, gbc);
panel.add(txtShipCharges);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 18;
gbl.setConstraints(labelGiftWrapCharges, gbc);
panel.add(labelGiftWrapCharges);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 18;
gbl.setConstraints(txtGiftWrapCharges, gbc);
panel.add(txtGiftWrapCharges);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 22;
gbl.setConstraints(labelOrdProc, gbc);
panel.add(labelOrdProc);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 21;
gbl.setConstraints(rY, gbc);
panel.add(rY);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 23;
gbl.setConstraints(rN, gbc);
panel.add(rN);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 26;
gbl.setConstraints(labelTotalCost, gbc);
panel.add(labelTotalCost);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 26;
gbl.setConstraints(txtTotalCost, gbc);
panel.add(txtTotalCost);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 29;
gbl.setConstraints(labelExpDelDate, gbc);
panel.add(labelExpDelDate);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 29;
gbl.setConstraints(txtExpDelDate, gbc);
panel.add(txtExpDelDate);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 2;
gbc.gridy = 32;
gbl.setConstraints(labelOrderDate, gbc);
panel.add(labelOrderDate);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 6;
gbc.gridy = 32;
gbl.setConstraints(txtOrderDate, gbc);
panel.add(txtOrderDate);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 5;
gbc.gridy = 36;
gbl.setConstraints(btOK, gbc);
panel.add(btOK);

gbc.anchor = GridBagConstraints.NORTH;
gbc.gridx = 7;
gbc.gridy = 37;
gbl.setConstraints(btCancel, gbc);
panel.add(btCancel);
}
}