quitdialog.java

该程序用java实现了白板功能。。。。。。。。。。。。。。。。

import java.net.*;
import java.io.*;
import java.awt.*;
import java.util.*;
import java.applet.*;

//class 5:QuitDialg，服务器退出对话框
public class QuitDialog extends Dialog {
	void yesButton_Clicked(Event event) {

	  getParent().handleEvent(new Event(this,
     Event.WINDOW_DESTROY, null));
	}

	void noButton_Clicked(Event event) {
		//{{CONNECTION
		// Clicked from noButton Hide the Dialog
		hide();
		//}}
	}

	public QuitDialog(Frame parent, boolean modal) {

	  super(parent, modal);
   //setIconImage(icon);

		//{{INIT_CONTROLS
		setLayout(null);
		addNotify();
		resize(insets().left + insets().right + 337,
      insets().top + insets().bottom + 135);
		yesButton = new java.awt.Button(" Yes ");
		yesButton.reshape(insets().left + 72,insets().top + 84,79,22);
		yesButton.setFont(new Font("Dialog", Font.BOLD, 12));
		add(yesButton);
		noButton = new java.awt.Button(" No ");
		noButton.reshape(insets().left + 180,insets().top + 84,79,22);
		noButton.setFont(new Font("Dialog", Font.BOLD, 12));
		add(noButton);
		label1 = new java.awt.Label("Do you really want to quit?");
		label1.reshape(insets().left + 84,insets().top + 36,180,23);
		add(label1);
		setTitle("Chat&WhiteBoard Server 1.0 - Quit");
		setResizable(false);
		//}}
	}

	public QuitDialog(Frame parent, String title, boolean modal) {
	  this(parent, modal);
	  setTitle(title);
	}

  public synchronized void show() {
  	Rectangle bounds = getParent().bounds();
  	Rectangle abounds = bounds();

  	move(bounds.x + (bounds.width - abounds.width)/ 2,
  	   bounds.y + (bounds.height - abounds.height)/2);

  	super.show();
  }

	public boolean handleEvent(Event event) {
	  if(event.id == Event.WINDOW_DESTROY) {
	    hide();
	    return true;
	  }
		if (event.target == noButton && event.id
      == Event.ACTION_EVENT) {
			noButton_Clicked(event);
		}
		if (event.target == yesButton && event.id
     == Event.ACTION_EVENT) {
			yesButton_Clicked(event);
		}
		return super.handleEvent(event);
	}

	//{{DECLARE_CONTROLS
	java.awt.Button yesButton;
	java.awt.Button noButton;
	java.awt.Label label1;
	//}}
}