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1
3 package org.jgroups.demos;
4
5
6 import org.jgroups.Channel;
7 import org.jgroups.JChannel;
8 import org.jgroups.blocks.GroupRequest;
9 import org.jgroups.blocks.MethodCall;
10 import org.jgroups.blocks.RpcDispatcher;
11
12 import java.awt.*;
13 import java.awt.event.*;
14 import java.io.ByteArrayInputStream  ;
15 import java.io.ByteArrayOutputStream ;
16 import java.io.DataInputStream ;
17 import java.io.DataOutputStream ;
18 import java.util.Hashtable ;
19 import java.util.Random ;
20
21
22
23
24
30 public class DrawRepl implements MouseMotionListener, WindowListener, ActionListener,
31 Runnable {
32 private Graphics graphics=null;
33 private Frame mainFrame=null;
34 private Panel panel=null, sub_panel=null;
35 private final byte[] buf=new byte[128];
36 private final ByteArrayOutputStream out=new ByteArrayOutputStream ();
37 private DataOutputStream outstream;
38 private ByteArrayInputStream inp;
39 private DataInputStream instream;
40 private int x, y;
41 private final Hashtable colors=new Hashtable ();
42 private final Random random=new Random (System.currentTimeMillis());
43 private int col_val=1;
44 private Color current_color=Color.red;
45 private Button clear_button, leave_button;
46 private final String groupname="DrawReplGroup";
47 private final Font default_font=new Font("Helvetica",Font.PLAIN,12);
48
49 private EventQueue event_queue=null;
50 private Thread mythread=null;
51 private RpcDispatcher dispatcher;
52 private Channel channel;
53
54
55 public DrawRepl() {
56 colors.put(new Integer (1), Color.white);
57 colors.put(new Integer (2), Color.black);
58 colors.put(new Integer (3), Color.red);
59 colors.put(new Integer (4), Color.orange);
60 colors.put(new Integer (5), Color.green);
61 colors.put(new Integer (6), Color.magenta);
62 colors.put(new Integer (7), Color.cyan);
63 colors.put(new Integer (8), Color.blue);
64 mythread=new Thread (this);
65 try {
66 channel=new JChannel();
67 dispatcher=new RpcDispatcher(channel, null, null, this);
68 channel.connect(groupname);
69 }
70 catch(Exception e) {
71 System.err.println(e);
72 System.exit(0);
73 }
74 }
75
76
77 public static void main(String [] args) {
78 DrawRepl draw=new DrawRepl();
79 draw.go();
80 }
81
82
83 private Color SelectColor() {
84 col_val=(Math.abs(random.nextInt()) % 8)+1;
85 Color ret=(Color)colors.get(new Integer (col_val));
86 if(ret == null)
87 ret=Color.red;
88 return ret;
89 }
90
91
92
93 AWTEvent copyEvent(Component src, AWTEvent evt) {
94
95 if(evt instanceof MouseEvent) {
96 MouseEvent mev=(MouseEvent)evt;
97 return new MouseEvent(src, evt.getID(), mev.getWhen(), mev.getModifiers(),
98 mev.getX(), mev.getY(), mev.getClickCount(),
99 mev.isPopupTrigger());
100 }
101
102 if(evt instanceof KeyEvent) {
103 KeyEvent kev=(KeyEvent)evt;
104 return new KeyEvent(src, evt.getID(), kev.getWhen(), kev.getModifiers(),
105 kev.getKeyCode(), kev.getKeyChar());
106 }
107
108 if(evt instanceof ActionEvent)
109 return new ActionEvent(src, evt.getID(), ((ActionEvent)evt).getActionCommand(),
110 ((ActionEvent)evt).getModifiers());
111
112
113 if(evt instanceof PaintEvent)
114 return new PaintEvent(src, evt.getID(), ((PaintEvent)evt).getUpdateRect());
115
116
117 if(evt instanceof FocusEvent)
118 return new FocusEvent(src, evt.getID(), ((FocusEvent)evt).isTemporary());
119
120 if(evt instanceof ComponentEvent)
121 return new ComponentEvent(src, evt.getID());
122
123 return null;
124 }
125
126
127
128 void dispatch(Object src, AWTEvent evt) {
129 if (src instanceof Component)
130 ((Component)src).dispatchEvent(evt);
131 else if (src instanceof MenuComponent)
132 ((MenuComponent)src).dispatchEvent(evt);
133 else
134 System.err.println("++++++++++");
135 }
136
137
138 public Component findComponent(Container parent, String comp_name) {
139 Component retval=null;
140
141 if(comp_name != null && comp_name.equals(parent.getName()))
142 return parent;
143
144 int ncomponents = parent.getComponentCount();
145 Component components[] = parent.getComponents();
146 for (int i = ncomponents-1 ; i >= 0; i--) {
147 Component comp = components[i], tmp;
148 if (comp != null) {
149 if(comp instanceof Container) {
150 retval=findComponent((Container)comp, comp_name);
151 if(retval != null)
152 return retval;
153 }
154 else if(comp_name.equals(comp.getName()))
155 return comp;
156 }
157 }
158 return retval;
159 }
160
161
162
166
167
168 public void processEvent(String comp_name, AWTEvent evt) {
169 AWTEvent copy_evt=null;
170 Component SRC=findComponent(mainFrame, comp_name);
171 if(src == null) {
172 System.err.println("processEvent(): src is null");
173 return;
174 }
175
176 System.out.println("Received " + evt.getClass().getName());
177
178 copy_evt=copyEvent(src, evt);
179 if(copy_evt == null) {
180 System.err.println("copy_evt is NULL");
181 return;
182 }
183 dispatch(src, copy_evt);
184
185
186 }
197
198
199 void processLocally(AWTEvent evt) {
200 dispatch(evt.getSource(), evt);
201 }
202
203
204
205 public void run() {
206 String comp_name;
207
208 while(true) {
209 try {
210 AWTEvent evt=event_queue.getNextEvent();
211 Object obj=evt.getSource();
212 if(obj == null) {
213 System.err.println("src is NULL");
214 continue;
215 }
216
217 if(obj instanceof Component)
218 comp_name=((Component)obj).getName();
219 else if(obj instanceof MenuComponent)
220 comp_name=((MenuComponent)obj).getName();
221 else {
222 System.err.println("src is of type " + obj.getClass().getName());
223 continue;
224 }
225
226 if(evt instanceof FocusEvent || evt instanceof PaintEvent) {
227 System.out.println(evt.getClass().getName() + " not copied");
228 processLocally(evt);
229 continue;
230 }
231 System.out.println("MCasting "+evt.getClass().getName()+" event...");
232 MethodCall call = new MethodCall("processEvent", new Object [] {comp_name, evt},
233 new String [] {String .class.getName(), AWTEvent.class.getName()});
234 dispatcher.callRemoteMethods(null, call, GroupRequest.GET_NONE, 0);
235 }
236 catch(Exception e) {
237 System.err.println(e);
238 }
239 }
240 }
241
242
243
244
245 public void go() {
246 mainFrame=new Frame();
247 panel=new Panel();
248 sub_panel=new Panel();
249
250 event_queue=mainFrame.getToolkit().getSystemEventQueue();
251 mythread.start();
252
253 mainFrame.setSize(200,200);
254 mainFrame.add("Center", panel);
255 clear_button=new Button("Clear");
256 clear_button.setFont(default_font);
257 clear_button.addActionListener(this);
258 leave_button=new Button("Exit");
259 leave_button.setFont(default_font);
260 leave_button.addActionListener(this);
261 sub_panel.add("South", clear_button);
262 sub_panel.add("South", leave_button);
263 mainFrame.add("South", sub_panel);
264
265 mainFrame.addWindowListener(this);
266
268 panel.addMouseMotionListener(this);
269
270 mainFrame.setVisible(true);
271
272 graphics=panel.getGraphics();
273 current_color=SelectColor();
274 if(current_color == null)
275 current_color=Color.red;
276 graphics.setColor(current_color);
277 }
278
279
280
281
282
283
284 public void mouseMoved(MouseEvent e) {
285 }
286
287 public void mouseDragged(MouseEvent e) {
288 x=e.getX();
289 y=e.getY();
290 graphics.fillOval(x, y, 10, 10);
291 }
292
293
294 public void clearPanel() {
295
296 System.out.println("CLEAR");
297
298 Rectangle bounds=panel.getBounds();
299 graphics.clearRect(0, 0, bounds.width, bounds.height);
300 }
301
302
303
304 public void windowActivated(WindowEvent e) {}
305 public void windowClosed(WindowEvent e) {}
306 public void windowClosing(WindowEvent e) {
307 System.exit(0);
308 }
309 public void windowDeactivated(WindowEvent e) {}
310 public void windowDeiconified(WindowEvent e) {}
311 public void windowIconified(WindowEvent e) {}
312 public void windowOpened(WindowEvent e) {}
313
314
315
316
320
324
326
328
329
330
331 public void actionPerformed(ActionEvent e) {
332 String command=e.getActionCommand();
333 if("Clear".equals(command))
334 clearPanel();
335 else if("Exit".equals(command)) {
336 mainFrame.setVisible(false);
337 System.exit(0);
338 }
339 else
340 System.out.println("Unknown action");
341 }
342
343
344 }
345
346 |
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