extends AbstractBorder (CurvedBorder) : AbstractBorder « javax.swing.border « Java by API

1. Java by API
2. javax.swing.border
3. AbstractBorder

extends AbstractBorder (CurvedBorder)

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 MainClass extends JPanel {

    public MainClass() {
        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 MainClass());
         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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