//*****************************************************************************
//   Copyright (c) 1998 INRIA.
//   http://www.inria.fr/croap/aioli/modules/figue/web/credits.html#COPYRIGHT
//*****************************************************************************

package figue.tutorial;

import java.awt.Font;
import java.awt.Component;
import java.awt.Graphics;
import java.awt.FontMetrics;
import java.awt.event.MouseEvent;
import java.awt.AWTEvent;
import java.awt.BorderLayout;
import java.awt.Button;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Label;
import java.util.Hashtable;
import java.net.URL;
import java.net.MalformedURLException;
import java.awt.Panel;
import java.awt.FlowLayout;

import figue.*;
import figue.box.*;
import figue.path.*;
import figue.resource.*;
import figue.event.*;

public final class Tutorial_17 extends TutorialApplet {

    /**
     * For code identification with unix what command.
     * @level internal
     */
    public final static String VERSION_ID
	= "@(#) $Source: /net/croap/CVSROOT/figue/java/tutorial/Tutorial_17.java,v $ $revision$ $Date: 1998/11/02 15:55:51 $ Copyright 1998 INRIA.";

    protected final void initTutorial() {
	_history = new HyperlinkHistoryInterface() {
	    public final void clear() {
		_followedLinks.clear();
	    }
	    public final boolean isVisited(Hyperlink aLink) {
		return _followedLinks.containsKey((String)(aLink.getInfo()));
	    }
	    public final void setVisited(Hyperlink aLink) {
		_followedLinks.put((String)(aLink.getInfo()),this);
	    }
	    private Hashtable _followedLinks = new Hashtable();
	};
	setLayout(new BorderLayout());
	final Panel thePanel = new Panel();
	thePanel.setLayout(new FlowLayout(FlowLayout.LEFT,10,5));
	Button theButton = new Button("Clear history");
	thePanel.add(theButton);
	_statusLine = new Label(STATUS);
	thePanel.add(_statusLine);
	add(BorderLayout.SOUTH,thePanel);
	theButton.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent anEvent) {
		_history.clear();
		_facade.refresh();
	    }
	});
	_facade = new AWTFacade(getParameters());
	_facade.addHyperlinkListener(new HyperlinkListenerInterface() {
	    public void linkEntered(HyperlinkEvent anEvent) {
		_statusLine.setText(STATUS + (String)(anEvent.getHyperlink().getInfo()));
		_statusLine.invalidate();
		validate();
	    }
	    public final void linkClicked(HyperlinkEvent anEvent) {
		try {
		    final String theString = (String)(anEvent.getHyperlink().getInfo());
		    final URL theUrl;
		    if ( theString.equals(POSTER) ) {
			theUrl = new URL("http://us.imdb.com/Posters?It%27s+a+Wonderful+Life+(1946)");
		    }
		    else {
			if ( theString.equals(URL) ) {
			    theUrl = new URL("http://us.imdb.com/Title?It%27s+a+Wonderful+Life+(1946)");
			}
			else {
			    theUrl = null;
			}
		    }
		    if ( theUrl!= null ) {
			anEvent.getHyperlink().setVisited();
			getAppletContext().showDocument(theUrl);
		    }
		}
		catch ( MalformedURLException anException ) {
		    ;
		}
	    
	    }
	    public final void linkExited(HyperlinkEvent anEvent) {
		_statusLine.setText(STATUS);
		_statusLine.invalidate();
		validate();
	    }
	});
	add(BorderLayout.CENTER,_facade.getAwtComponent());
	setDefaultKeyListener(_facade);
	validate();
	initResources();
	buildBox();
    }

    public final void destroy() {
	_facade.disposeWhenInactive();
	_facade = null;
	super.destroy();
    }

    private final void buildBox() {
	GlyphInterface theParagraph = new Paragraph();
	GlyphInterface theLink;
	for ( int theCounter = 0; theCounter < 10; theCounter++ ) {
	    theParagraph.addChild(Atom.newAtom("Click"));
	    theParagraph.addChild(Atom.newAtom("on"));
	    theParagraph.addChild(Atom.newAtom("the"));
	    theParagraph.addChild(Atom.newAtom("following"));
	    theParagraph.addChild(Atom.newAtom("link:"));
	    if ( ( theCounter % 2 ) == 0 ) {
		theLink = new Hyperlink(POSTER,_history);
	    }
	    else {
		theLink = new Hyperlink(URL,_history);
	    }
	    theLink.addChild(Atom.newAtom("its"));
	    theLink.addChild(Atom.newAtom('a'));
	    theLink.addChild(Atom.newAtom("wonderful"));
	    theLink.addChild(Atom.newAtom("life"));
	    if ( ( theCounter % 2 ) == 0 ) {
		theLink.addChild(Atom.newAtom("(poster)."));
	    }
	    else {
		theLink.addChild(Atom.newAtom("(url)."));
	    }
	    theParagraph.addChild(theLink);
	}
	PathInterface thePath = new Path();
	thePath.addOperation(new InsertGlyph(theParagraph,0));
	_facade.buildInit(thePath);
	_facade.buildComplete();
    }

    private final void initResources() {
	try {
	    _facade.doGetColor(Constants.DEFAULT_COLOR,BasicColor.BLACK);
	    _facade.doGetColor(Constants.DEFAULT_BACKGROUND,BasicColor.WHITE);
	    _facade.doGetFont(Constants.DEFAULT_FONT,FontFamily.TIMES_ROMAN,FontStyle.PLAIN,15,false);
	    _facade.doGetColor(Constants.ACTIVE_LINK_COLOR,BasicColor.BLUE);
	    _facade.doGetColor(Constants.VISITED_LINK_COLOR,BasicColor.MAGENTA);
	    _facade.doGetColor(Constants.SELECTED_LINK_COLOR,BasicColor.RED);
	    _facade.doGetFont(Constants.ACTIVE_LINK_FONT,FontFamily.TIMES_ROMAN,FontStyle.ITALIC,15,true);
	}
	catch ( WrongResourceException anException ) {
	    ;
	}
	initStandardResources(_facade);
    }

    private final FacadeInitializer getParameters() {
	FacadeInitializer theParameters = new FacadeInitializer();
	theParameters.setFormattingWidth(475);
	theParameters.setHorizontalScrollbarPolicy(ScrollbarPolicy.ALWAYS);
	setAppletParameters(theParameters);
	return theParameters;
    }

    private AWTFacade _facade;
    private HyperlinkHistoryInterface _history;
    private Label _statusLine;
  
    private final static String STATUS = "Status: ";
    private final static String URL = "URL";
    private final static String POSTER = "POSTER";
  
}