Source Code : Indicator Table Example

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Indicator Table Example

 

// Example from http://www.crionics.com/products/opensource/faq/swing_ex/SwingExamples.html


/* (swing1.1) */


import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Component;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.Enumeration;
import java.util.Hashtable;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JProgressBar;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.event.TableModelEvent;
import javax.swing.event.TableModelListener;
import javax.swing.table.DefaultTableModel;
import javax.swing.table.TableCellRenderer;
import javax.swing.table.TableModel;

/**
 * @version 1.0 03/03/99
 */
public class IndicatorTableExample extends JPanel {
  private static final int MAX = 100;

  private static final int MIN = 0;

  public IndicatorTableExample() {
    setLayout(new BorderLayout());

    DefaultTableModel dm = new DefaultTableModel() {
      public Class getColumnClass(int col) {
        switch (col) {
        case 0:
          return String.class;
        case 1:
          return Integer.class;
        case 2:
          return Integer.class;
        default:
          return Object.class;
        }
      }

      public boolean isCellEditable(int row, int col) {
        switch (col) {
        case 2:
          return false;
        default:
          return true;
        }
      }

      public void setValueAt(Object obj, int row, int col) {
        if (col != 1) {
          super.setValueAt(obj, row, col);
          return;
        }
        try {
          Integer integer = new Integer(obj.toString());
          super.setValueAt(checkMinMax(integer), row, col);
        } catch (NumberFormatException ex) {
          ex.printStackTrace();
        }
      }
    };
    dm.setDataVector(new Object[][] {
        { "not human", new Integer(100), new Integer(100) },
        { "hard worker", new Integer(76), new Integer(76) },
        { "ordinary guy", new Integer(51), new Integer(51) },
        { "lazy fellow", new Integer(12), new Integer(12) } },
        new Object[] { "Name", "Result", "Indicator" });

    JTable table = new JTable(dm);

    IndicatorCellRenderer renderer = new IndicatorCellRenderer(MIN, MAX);
    renderer.setStringPainted(true);
    renderer.setBackground(table.getBackground());

    // set limit value and fill color
    Hashtable limitColors = new Hashtable();
    limitColors.put(new Integer(0), Color.green);
    limitColors.put(new Integer(60), Color.yellow);
    limitColors.put(new Integer(80), Color.red);
    renderer.setLimits(limitColors);
    table.getColumnModel().getColumn(2).setCellRenderer(renderer);

    table.getModel().addTableModelListener(new TableModelListener() {
      public void tableChanged(TableModelEvent e) {
        if (e.getType() == TableModelEvent.UPDATE) {
          int col = e.getColumn();
          if (col == 1) {
            int row = e.getFirstRow();
            TableModel model = (TableModel) e.getSource();
            Integer value = (Integer) model.getValueAt(row, col);
            model.setValueAt(checkMinMax(value), row, ++col);
          }
        }
      }
    });

    JScrollPane pane = new JScrollPane(table);
    add(pane, BorderLayout.CENTER);
  }

  public static void main(String[] args) {
    JFrame f = new JFrame("IndicatorTable Example");
    f.getContentPane()
        .add(new IndicatorTableExample(), BorderLayout.CENTER);
    f.setSize(400, 120);
    f.setVisible(true);
    f.addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent e) {
        System.exit(0);
      }
    });
  }

  private Integer checkMinMax(Integer value) {
    int intValue = value.intValue();
    if (intValue < MIN) {
      intValue = MIN;
    } else if (MAX < intValue) {
      intValue = MAX;
    }
    return new Integer(intValue);
  }
}

/**
 * @version 1.0 03/03/99
 */

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 e = limitColors.keys();
    while (e.hasMoreElements()) {
      limitValues[i++] = ((Integer) e.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;
    }
  }
}



           
         
  

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