/*
 * [TestPan.java]
 *
 * Summary: Test smooth scrolling.
 *
 * Copyright: (c) 1998-2017 Roedy Green, Canadian Mind Products, http://mindprod.com
 *
 * Licence: This software may be copied and used freely for any purpose but military.
 *          http://mindprod.com/contact/nonmil.html
 *
 * Requires: JDK 1.8+
 *
 * Created with: JetBrains IntelliJ IDEA IDE http://www.jetbrains.com/idea/
 *
 * Version History:
 *  1.0 2002-06-28 original.
 */
package com.mindprod.smooth;

import javax.swing.JFrame;
import java.awt.Color;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.RenderingHints;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

/**
 * Test smooth scrolling.
 *
 * @author Roedy Green, Canadian Mind Products
 * @version 1.0 2002-06-28 original.
 * @since 2002-06-28
 */
public class TestPan implements Runnable
    {
    public static void main( String[] args )
        {
        // size of big image will slowly pan
        int w = 800;
        int h = 600;
        JFrame f = new JFrame();
        f.pack();
        Image bigImage = f.createImage( w, h );
        if ( bigImage == null )
            {
            System.out.println( "failed to create image" );
            }
        Graphics g = bigImage.getGraphics();
        Graphics2D g2d = null;
        if ( g instanceof Graphics2D )
            {
            g2d = ( Graphics2D ) g;
            g2d.addRenderingHints( new RenderingHints(
                    RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON ) );
            }
        g.setColor( Color.RED );
        g.fillRect( 0, 0, w, 168 );
        g.setColor( Color.BLUE );
        g.fillRect( 0, 168, w, h );
        g.setColor( Color.WHITE );
        g.setFont( new Font( "Arial", Font.BOLD, 48 ) );
        FontMetrics fm = g.getFontMetrics();
        int strHeight = fm.getHeight();
        g.drawString( "AQUEDUCT", ( ( w - fm.stringWidth( "AQUEDUCT" ) ) / 2 ), strHeight );
        int y = strHeight + 168;
        for ( int i = 0; i < h / strHeight; i++ )
            {
            g.drawString(
                    i + " Now is the time for all good men to come to the aid of the party.", 10, y );
            y += strHeight;
            }
        // start the scroll.
        ScrollingImage tp = new ScrollingImage( bigImage,     /* image to scroll */
                100,          /* slowness */
                200,          /* height */
                new TestPan() /* notify */
        );
        tp.setBackground( Color.green );
        f.getContentPane().add( tp );
        f.addWindowListener( new WindowAdapter()
            {
            public void windowClosing( WindowEvent we )
                {
                System.exit( 0 );
                }
            } );
        f.pack();
        f.setVisible( true );
        }

    public void run()
        {
        System.out.println( "scrolling cycle complete." );
        }
    }