StatusBar.java

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package org.libcsdbg.jtracer;

import java.util.Hashtable;

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.Font;
import java.awt.Color;
import java.awt.Insets;
import java.awt.GridBagLayout;
import java.awt.GridBagConstraints;
import java.awt.EventQueue;

import javax.swing.JPanel;
import javax.swing.JLabel;
import javax.swing.Timer;
import javax.swing.SwingUtilities;
import javax.swing.BorderFactory;
import javax.swing.border.EtchedBorder;

public class StatusBar extends JPanel implements ActionListener
{
  private static final long serialVersionUID = 0x00;

  private long uptime = 0;

  private Timer timer = null;

  private Hashtable<String, JLabel> fields = null;


  StatusBar(String msg)
  {
    super();
    fields = new Hashtable<String, JLabel>();
    GridBagLayout lm = new GridBagLayout();
    GridBagConstraints c = new GridBagConstraints();
    setLayout(lm);

    JPanel field = createField("status", msg);
    c.gridx = c.gridy = 0;
    c.weightx = 1;
    c.insets = new Insets(0, 0, 0, 0);
    c.fill = GridBagConstraints.HORIZONTAL;
    lm.setConstraints(field, c);
    add(field);

    field = createField("uptime", "Uptime 00:00:00");
    c.gridx++;
    c.weightx = 0;
    c.fill = GridBagConstraints.NONE;
    lm.setConstraints(field, c);
    add(field);

    field = createField("protocol", "TCP");
    c.gridx++;
    lm.setConstraints(field, c);
    add(field);

    field = createField("sessionCount", "0 sessions");
    c.gridx++;
    lm.setConstraints(field, c);
    add(field);

    field = createField("traceCount", "0 traces");
    c.gridx++;
    lm.setConstraints(field, c);
    add(field);
  }


  public void setMessage(final String msg, final boolean normal)
  {
    /* If the rendering is done by the event dispatching thread */
    if (EventQueue.isDispatchThread()) {
      JLabel field = fields.get("status");
      field.setText(msg);

      Registry conf = Registry.getCurrent();
      if (!normal) {
        field.setForeground((Color) conf.get("statusbar", "fgcolor-error"));
        field.setIcon(conf.loadIcon("stat_err.png"));
      }
      else {
        field.setForeground((Color) conf.get("statusbar", "fgcolor"));
        field.setIcon(conf.loadIcon("stat_ok.png"));
      }

      return;
    }

    /*
     * If the rendering is done from any other thread, create a Worker task and
     * register it to be called by the event dispatching thread
     */
    class Worker implements Runnable {
      public void run()
      {
        /* The task is to recursively call the same method */
        setMessage(msg, normal);
      }
    }

    try {
      SwingUtilities.invokeLater(new Worker());
    }

    catch (Throwable t) {
      Registry.debug(t);
    }
  }


  public void setIndicator(String nm, int cnt)
  {
    JLabel field = fields.get(nm + "Count");

    String text = cnt + " " + nm;
    if (cnt != 1)
      text += "s";
    field.setText(text);

    Registry conf = Registry.getCurrent();
    Color bg = null;
    if (cnt > 0)
      bg = (Color) conf.get("statusbar", "bgcolor-counter-active");
    else
      bg = (Color) conf.get("statusbar", "bgcolor");

    field.getParent().setBackground(bg);
  }


  public void setIndicators(int sessions, int traces)
  {
    setIndicator("session", sessions);
    setIndicator("trace", traces);
  }


  public void startUptimeTimer()
  {
    /* If the rendering is done by the event dispatching thread */
    if (EventQueue.isDispatchThread()) {
      Registry conf = Registry.getCurrent();
      Color bg = (Color) conf.get("statusbar", "bgcolor-uptime-active");
      fields.get("uptime").getParent().setBackground(bg);

      timer = new Timer(1000, this);
      timer.setActionCommand("Uptime timer");
      timer.setCoalesce(false);
      timer.start();
      return;
    }

    /*
     * If the rendering is done from any other thread, create a Worker task and
     * register it to be called by the event dispatching thread
     */
    class Worker implements Runnable {
      public void run()
      {
        /* The task is to recursively call the same method */
        startUptimeTimer();
      }
    }

    try {
      SwingUtilities.invokeLater(new Worker());
    }

    catch (Throwable t) {
      Registry.debug(t);
    }
  }


  public void stopUptimeTimer()
  {
    stopUptimeTimer(true, true);
  }


  public void stopUptimeTimer(final boolean reset, final boolean normal)
  {
    /* If the rendering is done by the event dispatching thread */
    if (EventQueue.isDispatchThread()) {
      timer.stop();
      timer = null;

      Registry conf = Registry.getCurrent();
      JLabel field = fields.get("uptime");
      field.getParent().setBackground((Color) conf.get("statusbar", "bgcolor"));

      if (!normal)
        field.setForeground((Color) conf.get("statusbar", "fgcolor-error"));

      if (reset) {
        uptime = 0;
        renderUptime();
      }

      return;
    }

    /*
     * If the rendering is done from any other thread, create a Worker task and
     * register it to be called by the event dispatching thread
     */
    class Worker implements Runnable {
      public void run()
      {
        /* The task is to recursively call the same method */
        stopUptimeTimer(reset, normal);
      }
    }

    try {
      SwingUtilities.invokeLater(new Worker());
    }

    catch (Throwable t) {
      Registry.debug(t);
    }
  }


  private JPanel createField(String tag, String text)
  {
    GridBagLayout lm = new GridBagLayout();
    GridBagConstraints c = new GridBagConstraints();
    JPanel retval = new JPanel(lm);

    Registry conf = Registry.getCurrent();
    retval.setBackground((Color) conf.get("statusbar", "bgcolor"));
    retval.setBorder(BorderFactory.createEtchedBorder(EtchedBorder.LOWERED));

    JLabel field = new JLabel(text);
    field.setFont((Font) conf.get("statusbar", "font"));
    field.setForeground((Color) conf.get("statusbar", "fgcolor"));

    if (tag.equals("status")) {
      field.setIcon(conf.loadIcon("stat_ok.png"));
      field.setIconTextGap(6);
      c.weightx = 1;
      c.anchor = GridBagConstraints.EAST;
    }

    c.insets = new Insets(1, 8, 1, 8);
    lm.setConstraints(field, c);
    retval.add(field);

    fields.put(tag, field);
    return retval;
  }


  private void renderUptime()
  {
    long now = uptime;
    long hours = now / 3600;

    now = now % 3600;
    long minutes = now / 60;
    long seconds = now % 60;

    String tm = "Uptime ";
    tm += ((hours < 10) ? "0" : "") + hours + ":";
    tm += ((minutes < 10) ? "0" : "") + minutes + ":";
    tm += ((seconds < 10) ? "0" : "") + seconds;

    fields.get("uptime").setText(tm);
  }


  public void actionPerformed(ActionEvent event)
  {
    try {
      uptime++;
      renderUptime();
    }

    catch (Throwable t) {
      Registry.debug(t);
    }
  }
}