messagebox.java

用Java写的面相对象的数据库管理系统

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-2000 by SMB GmbH. All rights reserved.
//
// $Id: MessageBox.java,v 1.7 2000/10/28 16:55:20 daniela Exp $

package org.ozoneDB.tools;

import java.awt.*;
import java.awt.event.*;


public class MessageBox extends Dialog {
    public static int YES = 1;
    public static int NO = 2;
    public static int CANCEL = 4;
    public static int OK = 8;
    public static int CONFIRM = 16;
    static int choice;
    
    
    class MBButton extends Button implements ActionListener {
        int kind;
        
        
        public MBButton( String title, int _kind ) {
            super( title );
            kind = _kind;
            addActionListener( this );
        }
        
        
        public void actionPerformed( ActionEvent e ) {
            ((MessageBox)getParent()).choice = kind;
            ((MessageBox)getParent()).close();
        } 
    }
    
    
    MessageBox( Frame parent, String msg, int buttons ) {
        super( parent, true );
        setLayout( new GridBagLayout() );
        GridBagConstraints c = new GridBagConstraints();
        c.weightx = 1.0;
        c.weighty = 1.0;
        c.fill = GridBagConstraints.NONE;
        c.anchor = GridBagConstraints.CENTER;
        c.gridwidth = GridBagConstraints.REMAINDER;
        add( new Label( msg ), c );
        c.fill = GridBagConstraints.BOTH;
        c.gridwidth = GridBagConstraints.RELATIVE;
        if ((buttons & YES) != 0) {
            add( new MBButton( "YES", YES ), c );
        } 
        if ((buttons & NO) != 0) {
            add( new MBButton( "NO", NO ), c );
        } 
        if ((buttons & CANCEL) != 0) {
            add( new MBButton( "CANCEL", CANCEL ), c );
        } 
        if ((buttons & OK) != 0) {
            add( new MBButton( "OK", OK ), c );
        } 
        if ((buttons & CONFIRM) != 0) {
            add( new MBButton( "CONFIRM", CONFIRM ), c );
        } 
        setSize( 20 + msg.length() * 7, 80 );
        setLocation( 200, 200 );
        show();
    }
    
    
    public void close() {
        setVisible( false );
    } 
    
    
    public static int YesNoBox( Frame parent, String msg ) {
        new MessageBox( parent, msg, YES | NO );
        return choice;
    } 
    
    
    public static int OkCancelBox( Frame parent, String msg ) {
        new MessageBox( parent, msg, OK | CANCEL );
        return choice;
    } 
    
    
    public static int ConfirmBox( Frame parent, String msg ) {
        new MessageBox( parent, msg, CONFIRM );
        return choice;
    } 
}