texticons.java~2~

java class文件介绍

/* (swing1.1) */
package zb.swing.icons;


import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.plaf.metal.*;


/**
 * @version 1.0 01/12/99
 */
public class TextIcons extends MetalIconFactory.TreeLeafIcon {

  protected String label;
  private static Hashtable labels;

  protected TextIcons() {
  }

  public void paintIcon(Component c, Graphics g, int x, int y) {
    super.paintIcon( c, g, x, y );
    if (label != null) {
      FontMetrics fm = g.getFontMetrics();

      int offsetX = (getIconWidth()  - fm.stringWidth(label)) /2;
      int offsetY = (getIconHeight() - fm.getHeight()) /2 - 2;

      g.drawString(label, x + offsetX ,
                          y + offsetY + fm.getHeight());
    }
  }

  public static Icon getIcon(String str) {
    if (labels == null) {
      labels = new Hashtable();
      setDefaultSet();
    }
    TextIcons icon = new TextIcons();
    icon.label = (String)labels.get(str);
    return icon;
  }

  public static void setLabelSet(String ext, String label) {
    if (labels == null) {
      labels = new Hashtable();
      setDefaultSet();
    }
    labels.put(ext, label);
  }

  private static void setDefaultSet() {
    labels.put("c"     ,"C");
    labels.put("java"  ,"J");
    labels.put("html"  ,"H");
    labels.put("htm"   ,"H");
  }

}