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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