1 package aurelienribon.utils.swing; 2 3 import java.awt.Component; 4 import java.awt.Graphics; 5 import java.awt.Graphics2D; 6 import java.awt.Insets; 7 import javax.swing.border.Border; 8 9 public class GroupBorder implements Border { 10 private final int titleHeight = 20; 11 private final int borderPadding = 0; 12 private String title = ""; 13 14 public String getTitle() { 15 return title; 16 } 17 18 public void setTitle(String title) { 19 this.title = title; 20 } 21 22 @Override 23 public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) { 24 Graphics2D gg = (Graphics2D) g.create(); 25 26 int titleW = gg.getFontMetrics().stringWidth(title) + 20; 27 int titleDescent = gg.getFontMetrics().getDescent(); 28 29 gg.setColor(c.getBackground()); 30 31 if (!title.equals("")) { 32 int[] xs = {0, titleW, titleW + titleHeight, 0}; 33 int[] ys = {0, 0, titleHeight, titleHeight}; 34 gg.fillPolygon(xs, ys, 4); 35 gg.fillRect(0, titleHeight, width, height); 36 gg.setColor(c.getForeground()); 37 gg.drawString(title, 10, titleHeight - titleDescent); 38 } else { 39 gg.fillRect(0, 0, width, height); 40 } 41 42 gg.dispose(); 43 } 44 45 @Override 46 public Insets getBorderInsets(Component c) { 47 return new Insets(!title.equals("") ? borderPadding + titleHeight : borderPadding, borderPadding, borderPadding, borderPadding); 48 } 49 50 @Override 51 public boolean isBorderOpaque() { 52 return false; 53 } 54 } 55
