Source Code : Component Alignment

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Component Alignment

      
/*
Definitive Guide to Swing for Java 2, Second Edition
By John Zukowski     
ISBN: 1-893115-78-X
Publisher: APress
*/

import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.GridLayout;
import java.awt.Insets;

import javax.swing.BorderFactory;
import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class YAxisDiffAlign {
  private static Container makeIt(String title, boolean more) {
    JPanel container = new JPanel() {
      public void paintComponent(Graphics g) {
        super.paintComponent(g);
        Insets insets = getInsets();
        int width = getWidth() - insets.left - insets.right;
        int halfWidth = width / 2 + insets.left;
        int height = getHeight();
        int halfHeight = height / 2 + insets.top;
        g.drawLine(halfWidth, 0, halfWidth, height);
      }
    };
    container.setBorder(BorderFactory.createTitledBorder(title));
    BoxLayout layout = new BoxLayout(container, BoxLayout.Y_AXIS);
    container.setLayout(layout);

    JButton button;
    button = new JButton("0.0");
    button.setOpaque(false);
    button.setAlignmentX(Component.LEFT_ALIGNMENT);
    container.add(button);
    if (more) {
      button = new JButton(".25");
      button.setOpaque(false);
      button.setAlignmentX(0.25f);
      container.add(button);
      button = new JButton(".5");
      button.setOpaque(false);
      button.setAlignmentX(Component.CENTER_ALIGNMENT);
      container.add(button);
      button = new JButton(".75");
      button.setOpaque(false);
      button.setAlignmentX(0.75f);
      container.add(button);
    }
    button = new JButton("1.0");
    button.setOpaque(false);
    button.setAlignmentX(Component.RIGHT_ALIGNMENT);
    container.add(button);

    return container;
  }

  public static void main(String args[]) {
    JFrame frame = new JFrame("Alignment Example");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

    Container panel1 = makeIt("Mixed", false);
    Container panel2 = makeIt("Mixed", true);

    Container contentPane = frame.getContentPane();
    contentPane.setLayout(new GridLayout(1, 2));
    contentPane.add(panel1);
    contentPane.add(panel2);

    frame.setSize(300, 200);
    frame.setVisible(true);
  }
}

           
         
    
    
    
    
    
  

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