reservationframe.java

数据结构及算法 对于参加ACM的学生有一定帮助 里面有详细的解答

//
//  Unified Library Application
//  Case study in Unified Modeling Language Toolkit
//
//  ReservationFrame.java
//
//
//  Copyright (c) 1998 John Wiley & Sons, Inc. All rights reserved.
//  Reproduction or translations of this work beyond that permitted
//  in Section 117 of the 1976 United States Copyright Act without
//  the express written permission of the copyright owner is unlawful.
//  Requests for further information should be addressed to Permissions
//  Department, John Wiley & Sons, Inc. The purchaser may make back-up
//  copies for his/her own use only and not for distribution or resale.
//  The Publisher assumes no responsibility for errors, omissions, or
//  damages, caused by the use of these programs of from the use of the
//  information contained herein.

package ui;
import bo.*;

import java.awt.*;
import java.util.*;
import util.*;

public class ReservationFrame extends Frame implements ResultOfFindTitle, ResultOfFindBorrower{
	private BorrowerInformation borrower;
	private Title title;

	void FindTitleButton_Clicked(Event event) {
		FindTitleDialog dlg = new FindTitleDialog(this,true);
		dlg.show();
	}

	void findBorrowerButton_Clicked(Event event) {
		FindBorrowerDialog dlg = new FindBorrowerDialog(this,true);
		dlg.show();
	}

	void okButton_Clicked(Event event) {
		if (borrower == null || title == null)
		{
		    new MessageBox(this,"Not enough information!");
		}
		else
		{
            Reservation reservation = new Reservation(title.getObjId(),borrower.getObjId());
            reservation.store();
            title.addReservation(reservation.getObjId());
            title.update();

            borrower.addReservation(reservation.getObjId());
            borrower.update();

		    dispose();
		}
	}

	void cancelButton_Clicked(Event event) {
		dispose();
	}

    public void resultTitle(ObjId titleid)
    {
        title = Title.getTitle(titleid);
        titleField.setText(title.getTitle());
        authorField.setText(title.getAuthor());
        checkStatus();
    }
    public void resultBorrower(ObjId borrowerid)
    {
        borrower = BorrowerInformation.getBorrowerInformation(borrowerid);
        borrowerField.setText(borrower.getLastName());
        checkStatus();
    }

    private void checkStatus()
    {
        if (borrower == null || title == null)
            okButton.disable();
        else
            okButton.enable();
    }

	public ReservationFrame() {

		//{{INIT_CONTROLS
		setLayout(null);
		addNotify();
		resize(insets().left + insets().right + 446,insets().top + insets().bottom + 208);
		titleField = new java.awt.TextField();
		titleField.setEditable(false);
		titleField.reshape(insets().left + 96,insets().top + 24,182,24);
		titleField.setBackground(new Color(12632256));
		add(titleField);
		label1 = new java.awt.Label("Title");
		label1.reshape(insets().left + 24,insets().top + 24,40,20);
		add(label1);
		authorField = new java.awt.TextField();
		authorField.setEditable(false);
		authorField.reshape(insets().left + 96,insets().top + 60,182,24);
		authorField.setBackground(new Color(12632256));
		add(authorField);
		borrowerField = new java.awt.TextField();
		borrowerField.setEditable(false);
		borrowerField.reshape(insets().left + 96,insets().top + 108,180,24);
		borrowerField.setBackground(new Color(12632256));
		add(borrowerField);
		label3 = new java.awt.Label("Borrower");
		label3.reshape(insets().left + 24,insets().top + 108,72,20);
		add(label3);
		FindTitleButton = new java.awt.Button("Find Title");
		FindTitleButton.reshape(insets().left + 288,insets().top + 24,120,24);
		add(FindTitleButton);
		findBorrowerButton = new java.awt.Button("Find Borrower");
		findBorrowerButton.reshape(insets().left + 288,insets().top + 108,120,24);
		add(findBorrowerButton);
		label2 = new java.awt.Label("Author");
		label2.reshape(insets().left + 24,insets().top + 60,48,20);
		add(label2);

		okButton = new java.awt.Button("OK (Confirm reservation)");
		okButton.reshape(insets().left + 132,insets().top + 156,192,24);
		add(okButton);
		cancelButton = new java.awt.Button("Close");
		cancelButton.reshape(insets().left + 348,insets().top + 156,60,24);
		add(cancelButton);
		setTitle("Reserve Title");
		//}}
        okButton.disable();
		//{{INIT_MENUS
		//}}
	}

	public ReservationFrame(String title) {
	    this();
	    setTitle(title);
	}

    public synchronized void show() {
    	move(50, 50);
    	super.show();
    }

	public boolean handleEvent(Event event) {
    	if (event.id == Event.WINDOW_DESTROY) {
            dispose();
            return true;
    	}
		if (event.target == FindTitleButton && event.id == Event.ACTION_EVENT) {
			FindTitleButton_Clicked(event);
			return true;
		}
		if (event.target == findBorrowerButton && event.id == Event.ACTION_EVENT) {
			findBorrowerButton_Clicked(event);
			return true;
		}
		if (event.target == okButton && event.id == Event.ACTION_EVENT) {
			okButton_Clicked(event);
			return true;
		}
		if (event.target == cancelButton && event.id == Event.ACTION_EVENT) {
			cancelButton_Clicked(event);
			return true;
		}
		return super.handleEvent(event);
	}

	//{{DECLARE_CONTROLS
	java.awt.TextField titleField;
	java.awt.Label label1;
	java.awt.TextField authorField;
	java.awt.TextField borrowerField;
	java.awt.Label label3;
	java.awt.Button findBorrowerButton;
	java.awt.Label label2;
	java.awt.Button FindTitleButton;
	java.awt.Button okButton;
	java.awt.Button cancelButton;
	//}}

	//{{DECLARE_MENUS
	//}}
}