indicatorcellrenderer.java

Swing Examples Sources Codes 里包含了Java Web开发的一些实例代码

/* (swing1.1) */
package jp.gr.java_conf.tame.swing.table;

import java.util.*;
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;

/**
 * @version 1.0 03/03/99
 */
public class IndicatorCellRenderer extends JProgressBar implements TableCellRenderer {
  private Hashtable limitColors;
  private int[] limitValues;
  
  public IndicatorCellRenderer() {
    super(JProgressBar.HORIZONTAL);
    setBorderPainted(false);
  }

  public IndicatorCellRenderer(int min, int max) {
    super(JProgressBar.HORIZONTAL, min, max);
    setBorderPainted(false);
  }
  
  public Component getTableCellRendererComponent(JTable table, Object value,
                   boolean isSelected, boolean hasFocus, int row, int column) {
    int n = 0;
    if (! (value instanceof Number)) {
      String str;
      if (value instanceof String) {
        str = (String)value;
      } else {
        str = value.toString();
      }
      try {
        n = Integer.valueOf(str).intValue();
      } catch (NumberFormatException ex) {
      }
    } else {
      n = ((Number)value).intValue();
    }
    Color color = getColor(n);
    if (color != null) {
      setForeground(color);
    }
    setValue(n);
    return this;
  }
  
  public void setLimits(Hashtable limitColors) {
    this.limitColors = limitColors;
    int i=0;
    int n = limitColors.size();   
    limitValues = new int[n];
    Enumeration enum = limitColors.keys();
    while (enum.hasMoreElements()) {
      limitValues[i++] = ((Integer)enum.nextElement()).intValue();
    }
    sort(limitValues);
  }
  
  private Color getColor(int value) {
    Color color = null;    
    if (limitValues != null) {
      int i;
      for (i=0;i<limitValues.length;i++) {
        if (limitValues[i] < value) {
          color = (Color)limitColors.get(new Integer(limitValues[i]));
        }
      }
    }
    return color;
  }
  
  private void sort(int[] a) {
    int n = a.length;
    for (int i=0; i<n-1; i++) {
      int k = i;
      for (int j=i+1; j<n; j++) {
        if (a[j] < a[k]) {
          k = j;
        }
      }
      int tmp = a[i];
      a[i] = a[k];
      a[k] = tmp;
    }
  }
}