//GBL2.java
//Improve the GridbagLayout
//Andy Harris, 05/00

import java.awt.*;
import java.applet.*;
import java.awt.event.*;

public class GBL2 extends Applet{
  Frame frmGBL = new Frame("Grid Bag Demo");
  Button btnShowFrame = new Button("Show Frame");
  EventHandler evt = new EventHandler();
  GridBagLayout gbl = new GridBagLayout();
  GridBagConstraints c = new GridBagConstraints();
  
  public void init(){
    add (btnShowFrame);
    btnShowFrame.addActionListener(evt);
    setUpFrame();
  } // end init

  private class EventHandler extends WindowAdapter implements ActionListener{

    public void actionPerformed(ActionEvent e){
      frmGBL.setVisible(true);
      frmGBL.setSize(400,300);
    } // end actionPerformed

    public void windowClosing(WindowEvent e){
      frmGBL.setVisible(false);
      frmGBL.dispose();
    } // end windowClosing

  } // end eventHandler class
  
  public void setUpFrame(){
    
    Button btn1 = new Button("Component 1");
    Button btn2 = new Button("Component 2");
    Button btn3 = new Button("Component 3");
    Button btn4 = new Button("Component 4");
    Button btn5 = new Button("Component 5");
    Button btn6 = new Button("Component 6");
    Button btn7 = new Button("Component 7");
  
    frmGBL.setLayout(gbl);
    frmGBL.addWindowListener(evt);
    
    //            comp   x  y  ht wd  x%  y%    fill
    placeComponent(btn1, 0, 0, 1, 3, 100, 25, c.BOTH);
    placeComponent(btn2, 0, 1, 2, 1,  50, 50, c.BOTH);
    placeComponent(btn3, 1, 1, 1, 2,  50, 25, c.BOTH);
    placeComponent(btn4, 1, 2, 2, 1,  25, 50, c.BOTH);
    placeComponent(btn5, 2, 2, 1, 1,  25, 25, c.BOTH);
    placeComponent(btn6, 0, 3, 1, 1,  50, 25, c.BOTH);
    placeComponent(btn7, 2, 3, 1, 1,  25, 25, c.BOTH);
    

  } // end setUpFrm

  public void placeComponent(
     Component comp,
     int x,
     int y,
     int height,
     int width,
     int xPerc,
     int yPerc,
     int fill){

    c.gridx = x;
    c.gridy = y;
    c.gridheight = height;
    c.gridwidth = width;
    c.weightx = xPerc;
    c.weighty = yPerc;
    c.fill = fill;
    
    gbl.setConstraints (comp, c);
    frmGBL.add(comp);
  } // end placeComponent

} // end class def