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41
42 package java2d;
43
44 import java.awt.*;
45 import java.awt.event.*;
46 import javax.swing.JPanel  ;
47 import javax.swing.border.EtchedBorder ;
48 import javax.swing.border.TitledBorder ;
49 import java.awt.font.TextLayout ;
50 import java.awt.font.FontRenderContext ;
51 import java.awt.image.BufferedImage ;
52 import java.awt.geom.Rectangle2D ;
53
54
55
60 public class PerformanceMonitor extends JPanel {
61
62 Surface surf;
63
64 public PerformanceMonitor() {
65 setLayout(new BorderLayout());
66 setBorder(new TitledBorder (new EtchedBorder (), "Performance"));
67 add(surf = new Surface());
68 }
69
70
71 public class Surface extends JPanel implements Runnable {
72
73 public Thread thread;
74 private BufferedImage bimg;
75 private Font font = new Font("Times New Roman", Font.PLAIN, 12);
76 private JPanel panel;
77
78
79 public Surface() {
80 setBackground(Color.black);
81 addMouseListener(new MouseAdapter() {
82 public void mouseClicked(MouseEvent e) {
83 if (thread == null) start(); else stop();
84 }
85 });
86 }
87
88 public Dimension getMinimumSize() {
89 return getPreferredSize();
90 }
91
92 public Dimension getMaximumSize() {
93 return getPreferredSize();
94 }
95
96 public Dimension getPreferredSize() {
97 int textH = getFontMetrics(font).getHeight();
98 return new Dimension(135,2+textH*4);
99 }
100
101
102 public void paint(Graphics g) {
103 if (bimg != null) {
104 g.drawImage(bimg, 0, 0, this);
105 }
106 }
107
108
109 public void start() {
110 thread = new Thread (this);
111 thread.setPriority(Thread.MIN_PRIORITY);
112 thread.setName("PerformanceMonitor");
113 thread.start();
114 }
115
116
117 public synchronized void stop() {
118 thread = null;
119 setSurfaceState();
120 notify();
121 }
122
123
124 public void setSurfaceState() {
125 if (panel != null) {
126 for (Component comp : panel.getComponents()) {
127 if (((DemoPanel) comp).surface != null) {
128 ((DemoPanel) comp).surface.setMonitor(thread != null);
129 }
130 }
131 }
132 }
133
134
135 public void setPanel(JPanel panel) {
136 this.panel = panel;
137 }
138
139
140 public void run() {
141
142 Thread me = Thread.currentThread();
143
144 while (thread == me && !isShowing() || getSize().width == 0) {
145 try {
146 thread.sleep(500);
147 } catch (InterruptedException e) { return; }
148 }
149
150 Dimension d = new Dimension(0, 0);
151 Graphics2D big = null;
152 FontMetrics fm = null;
153 int ascent = 0;
154 int descent = 0;
155
156 while (thread == me && isShowing()) {
157
158 if (getWidth() != d.width || getHeight() != d.height) {
159 d = getSize();
160 bimg = (BufferedImage ) createImage(d.width, d.height);
161 big = bimg.createGraphics();
162 big.setFont(font);
163 fm = big.getFontMetrics();
164 ascent = fm.getAscent();
165 descent = fm.getDescent();
166 setSurfaceState();
167 }
168
169 big.setBackground(getBackground());
170 big.clearRect(0, 0, d.width, d.height);
171 if (panel == null) {
172 continue;
173 }
174 big.setColor(Color.green);
175 int ssH = 1;
176 for (Component comp : panel.getComponents()) {
177 if (((DemoPanel) comp).surface != null) {
178 String pStr = ((DemoPanel) comp).surface.perfStr;
179 if (pStr != null) {
180 ssH += ascent;
181 big.drawString(pStr, 4, ssH+1);
182 ssH += descent;
183 }
184 }
185 }
186 repaint();
187
188 try {
189 thread.sleep(999);
190 } catch (InterruptedException e) { break; }
191 }
192 thread = null;
193 }
194 } } |
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