titleframe.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
//
//  TitleFrame.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 util.*;

import java.awt.*;

public class TitleFrame extends Frame {
    private Title current;

	void addButton_Clicked(Event event) {
		if (Title.findOnName(titleField.getText()) != null)
		{
		    new MessageBox(this,"A Title with that name already exists!");
		    return;
		}
		if (Title.findOnISBN(isbnField.getText()) != null)
		{
		    new MessageBox(this,"A title with the same isbn/nr field already exists!");
		    return;
		}
		int type = 0;
		if (bookButton.getState() == true)
		    type = Title.TYPE_BOOK;
		else if (magazineButton.getState() == true)
		    type = Title.TYPE_MAGAZINE;
		else
		{
		    new MessageBox(this,"Please give type of title!");
		    return;
		}
		current =
		    new Title(
		        titleField.getText(),
		        authorField.getText(),
		        isbnField.getText(),
		        type);
		int itemno;
		if (itemsField.getText().equals(""))
		    itemno = 0;
		else
		    itemno = Integer.valueOf(itemsField.getText()).intValue();
		if (itemno > 25)
	    {
	        new MessageBox(this, "Maximum number of items is 25!");
	        return;
	    }
		for (int i = 0; i < itemno; i++)
		{
		    Item it = new Item(current.getObjId(),i+1);
		    it.store();
		    current.addItem(it.getObjId());
		}
		current.store();
		titleField.setText("");
		authorField.setText("");
		isbnField.setText("");
		itemsField.setText("");
		bookButton.setState(false);
		magazineButton.setState(false);

	}

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

	public TitleFrame() {

		//{{INIT_CONTROLS
		setLayout(null);
		addNotify();
		resize(insets().left + insets().right + 430,insets().top + insets().bottom + 229);
		titleLabel = new java.awt.Label("Title Name");
		titleLabel.reshape(insets().left + 12,insets().top + 24,84,24);
		add(titleLabel);
		titleField = new java.awt.TextField();
		titleField.reshape(insets().left + 132,insets().top + 24,183,24);
		add(titleField);
		authorField = new java.awt.TextField();
		authorField.reshape(insets().left + 132,insets().top + 60,183,24);
		add(authorField);
		isbnField = new java.awt.TextField();
		isbnField.reshape(insets().left + 132,insets().top + 96,183,24);
		add(isbnField);
		label1 = new java.awt.Label("ISBN / Nr");
		label1.reshape(insets().left + 12,insets().top + 96,84,24);
		add(label1);
		label2 = new java.awt.Label("Author");
		label2.reshape(insets().left + 12,insets().top + 60,84,24);
		add(label2);
		addButton = new java.awt.Button("Insert");
		addButton.reshape(insets().left + 348,insets().top + 24,60,24);
		add(addButton);
		cancelButton = new java.awt.Button("Close");
		cancelButton.reshape(insets().left + 348,insets().top + 192,60,24);
		add(cancelButton);
		label3 = new java.awt.Label("Items available");
		label3.reshape(insets().left + 12,insets().top + 192,108,24);
		add(label3);
		itemsField = new java.awt.TextField();
		itemsField.reshape(insets().left + 132,insets().top + 192,36,23);
		add(itemsField);
		Group1 = new CheckboxGroup();
		bookButton = new java.awt.Checkbox("Book", Group1, false);
		bookButton.reshape(insets().left + 132,insets().top + 132,108,24);
		add(bookButton);
		magazineButton = new java.awt.Checkbox("Magazine", Group1, false);
		magazineButton.reshape(insets().left + 132,insets().top + 156,108,24);
		add(magazineButton);
		label4 = new java.awt.Label("Type");
		label4.reshape(insets().left + 12,insets().top + 132,108,24);
		add(label4);
		setTitle("Insert Title Window");
		//}}
		bookButton.setState(true);
		titleField.requestFocus();

		//{{INIT_MENUS
		//}}
	}

	public TitleFrame(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 == addButton && event.id == Event.ACTION_EVENT) {
			addButton_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.Label titleLabel;
	java.awt.TextField titleField;
	java.awt.TextField authorField;
	java.awt.TextField isbnField;
	java.awt.Label label1;
	java.awt.Label label2;
	java.awt.Button addButton;
	java.awt.Button cancelButton;
	java.awt.Label label3;
	java.awt.TextField itemsField;
	java.awt.Checkbox bookButton;
	CheckboxGroup Group1;
	java.awt.Checkbox magazineButton;
	java.awt.Label label4;
	//}}

	//{{DECLARE_MENUS
	//}}
}