Source Code : demonstrate the custom CurvedBorder class

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demonstrate the custom CurvedBorder class

   
import java.awt.Color;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.Insets;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JSlider;
import javax.swing.border.AbstractBorder;

public class CurvedExample extends JPanel {

  public CurvedExample() {
    super(true);

    JSlider mySlider = new JSlider();
    mySlider.setMajorTickSpacing(20);
    mySlider.setMinorTickSpacing(10);
    mySlider.setPaintTicks(true);
    mySlider.setPaintLabels(true);

    CurvedBorder border = new CurvedBorder(10, Color.darkGray);
    mySlider.setBorder(border);

    add(mySlider);
  }

  public static void main(String s[]) {
    JFrame frame = new JFrame("Custom Curved Border");
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setSize(300, 150);
    frame.setContentPane(new CurvedExample());
    frame.setVisible(true);
  }
}
class CurvedBorder extends AbstractBorder {
  private Color wallColor = Color.gray;

  private int sinkLevel = 10;

  public CurvedBorder() {
  }

  public CurvedBorder(int sinkLevel) {
    this.sinkLevel = sinkLevel;
  }

  public CurvedBorder(Color wall) {
    this.wallColor = wall;
  }

  public CurvedBorder(int sinkLevel, Color wall) {
    this.sinkLevel = sinkLevel;
    this.wallColor = wall;
  }

  public void paintBorder(Component c, Graphics g, int x, int y, int w, int h) {
    g.setColor(getWallColor());

    //  Paint a tall wall around the component
    for (int i = 0; i < sinkLevel; i++) {
      g.drawRoundRect(x + i, y + i, w - i - 1, h - i - 1, sinkLevel - i,
          sinkLevel);
      g.drawRoundRect(x + i, y + i, w - i - 1, h - i - 1, sinkLevel,
          sinkLevel - i);
      g.drawRoundRect(x + i, y, w - i - 1, h - 1, sinkLevel - i,
          sinkLevel);
      g.drawRoundRect(x, y + i, w - 1, h - i - 1, sinkLevel, sinkLevel
          - i);
    }
  }

  public Insets getBorderInsets(Component c) {
    return new Insets(sinkLevel, sinkLevel, sinkLevel, sinkLevel);
  }

  public Insets getBorderInsets(Component c, Insets i) {
    i.left = i.right = i.bottom = i.top = sinkLevel;
    return i;
  }

  public boolean isBorderOpaque() {
    return true;
  }

  public int getSinkLevel() {
    return sinkLevel;
  }

  public Color getWallColor() {
    return wallColor;
  }
}
           
         
    
    
  

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