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Java Source | 1998-12-01 | 4.5 KB | 166 lines |
- /*
- * @(#)PerformanceMonitor.java 1.24 98/09/13
- *
- * Copyright 1998 by Sun Microsystems, Inc.,
- * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
- * All rights reserved.
- *
- * This software is the confidential and proprietary information
- * of Sun Microsystems, Inc. ("Confidential Information"). You
- * shall not disclose such Confidential Information and shall use
- * it only in accordance with the terms of the license agreement
- * you entered into with Sun.
- */
-
-
- import java.awt.*;
- import java.awt.event.*;
- import javax.swing.JPanel;
- import javax.swing.border.EtchedBorder;
- import javax.swing.border.TitledBorder;
- import java.awt.font.TextLayout;
- import java.awt.font.FontRenderContext;
- import java.awt.image.BufferedImage;
- import java.awt.geom.Rectangle2D;
-
-
- /**
- * Displays the time for a DemoSurface to paint. Displays the number
- * of frames per second on animated demos. Up to four surfaces fit
- * in the display area.
- */
- public class PerformanceMonitor extends JPanel {
-
- MonitorComponent mc;
-
- public PerformanceMonitor() {
- setLayout(new BorderLayout());
- setBorder(new TitledBorder(new EtchedBorder(), "Performance"));
- mc = new MonitorComponent();
- add(mc);
- }
-
- public class MonitorComponent extends JPanel implements Runnable {
-
- public Thread thread;
- private BufferedImage bimg;
- private Font font = new Font("Times New Roman", Font.PLAIN, 12);
- private JPanel panel;
-
-
- public MonitorComponent() {
- setBackground(Color.black);
- addMouseListener(new MouseAdapter() {
- public void mouseClicked(MouseEvent e) {
- if (thread == null) start(); else stop();
- }
- });
- start();
- }
-
- public Dimension getMinimumSize() {
- return getPreferredSize();
- }
-
- public Dimension getMaximumSize() {
- return getPreferredSize();
- }
-
-
- public Dimension getPreferredSize() {
- TextLayout tl = new TextLayout("Nothing",font,
- new FontRenderContext(null, false, false));
- int h = (int)(tl.getAscent()+tl.getDescent());
- return new Dimension(140,4+h*4);
- }
-
-
- public void paint(Graphics g) {
- if (bimg != null) {
- g.drawImage(bimg, 0, 0, this);
- }
- }
-
-
- public void start() {
- thread = new Thread(this);
- thread.setPriority(Thread.MIN_PRIORITY);
- thread.setName("PerformanceMonitor");
- thread.start();
- }
-
-
- public synchronized void stop() {
- thread = null;
- setSurfaceState();
- notify();
- }
-
-
- public void setSurfaceState() {
- if (panel == null) {
- return;
- }
- Component cmps[] = panel.getComponents();
- for (int i = 0; i < cmps.length; i++) {
- if (((DemoPanel) cmps[i]).surface != null) {
- ((DemoPanel) cmps[i]).surface.setMonitor(thread != null);
- }
- }
- }
-
-
- public void setPanel(JPanel panel) {
- this.panel = panel;
- }
-
-
- public void run() {
-
- Thread me = Thread.currentThread();
-
- while (thread == me && !isShowing() || getSize().width == 0) {
- try {
- thread.sleep(500);
- } catch (InterruptedException e) { thread = null; return; }
- }
-
-
- bimg = (BufferedImage) createImage(getSize().width, getSize().height);
- Graphics2D big = bimg.createGraphics();
- big.setFont(font);
- FontMetrics fm = big.getFontMetrics();
- int ascent = fm.getAscent();
- int descent = fm.getDescent();
- Dimension d = getSize();
- setSurfaceState();
-
- while (thread == me && isShowing()) {
-
- try {
- thread.sleep(999);
- } catch (InterruptedException e) { thread = null; return; }
-
- big.setBackground(getBackground());
- big.clearRect(0, 0, d.width, d.height);
- big.setColor(Color.green);
- if (panel == null) {
- continue;
- }
- Component cmps[] = panel.getComponents();
- int ssH = 1;
- for (int i = 0; i < cmps.length; i++) {
- DemoSurface surface = ((DemoPanel) cmps[i]).surface;
- if (surface != null && surface.perfStr != null) {
- ssH += ascent;
- big.drawString(surface.perfStr, 4, ssH+1);
- ssH += descent;
- }
- }
- repaint();
- }
- thread = null;
- }
- } // End MonitorComponent
- } // End PeformanceMonitor
-