okdialog.java

java高级使用教程 全书一共分六章

// OkDialog - a dialog with an icon and an Ok button
//
// Copyright (C)1996,1998 by Jef Poskanzer <[e-mail]>. All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
//    notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
//    notice, this list of conditions and the following disclaimer in the
//    documentation and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
// OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
// HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
// OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
// SUCH DAMAGE.
//
// Visit the ACME Labs Java page for up-to-date versions of this and other
// fine Java utilities: http://www.acme.com/java/

package Acme.Widgets;

import java.awt.*;

/// A dialog with an icon and an Ok button.
// <P>
// Puts up a dialog with a client-specified icon and an Ok button.
// All user input is locked out until the button is clicked.
// <P>
// <A HREF="/resources/classes/Acme/Widgets/OkDialog.java">Fetch the software.</A><BR>
// <A HREF="/resources/classes/Acme.tar.gz">Fetch the entire Acme package.</A>

public class OkDialog extends Dialog
    {

    /// Constructor, no title.
    public OkDialog( Frame parent, Image icon, String message )
	{
	super( parent, true );
	build( icon, message );
	}

    /// Constructor, specified title.
    public OkDialog( Frame parent, String title, Image icon, String message )
	{
	super( parent, title, true );
	build( icon, message );
	}

    /// Common build routine.
    private void build( Image icon, String message )
	{
	setResizable( false );

	GridBagLayout gb = new GridBagLayout();
	setLayout( gb );
	GridBagConstraints gbc = new GridBagConstraints();
	gbc.insets = new Insets( 5, 5, 5, 5 );

	ImageLabel imageLabel = new ImageLabel( icon );
	gb.setConstraints( imageLabel, gbc );
	add( imageLabel );
	Label label = new Label( message );
	gbc.gridwidth = GridBagConstraints.REMAINDER;
	gb.setConstraints( label, gbc );
	add( label );
	Button button = new Button( "Ok" );
	gb.setConstraints( button, gbc );
	add( button );
	}


    // Show the box.
    public void show()
	{
	pack();
	validate();
	super.show();
	}


    /// Event handler.
    public boolean handleEvent( Event evt )
	{
	switch ( evt.id )
	    {
	    case Event.ACTION_EVENT:
	    if ( evt.arg.equals( "Ok" ) )
		{
		hide();
		//setVisible( false );
		dispose();
		return true;
		}
	    break;
	    }
	return super.handleEvent( evt );
	}

    }