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

package figue.tutorial;

import java.awt.BorderLayout;
import java.awt.Panel;
import java.awt.Choice;
import java.awt.Button;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.event.ItemListener;
import java.awt.event.ItemEvent;
import java.awt.Component;
import java.awt.FlowLayout;

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

public final class Tutorial_21 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_21.java,v $ $revision$ $Date: 1998/11/02 15:55:53 $ Copyright 1998 INRIA.";

    protected final void initTutorial() {
 	setLayout(new BorderLayout());
	_modifyFlag = false;
	_dataFlag = true;
	_choiceHorizontal = new Choice();
	_choiceHorizontal.add("Horizontal scroll always");
	_choiceHorizontal.add("Horizontal scroll never");
	_choiceHorizontal.add("Horizontal scroll as needed");
	_choiceHorizontal.select(2);
	_choiceHorizontal.addItemListener(new ItemListener() {
	    public void itemStateChanged(ItemEvent e) {
		if ( ! _modifyFlag ) {
		    _modifyFlag = true;
		    _buttonStart.setEnabled(true);
		}
	    }
	});
	_buttonStart = new Button("Apply parameters");
	_buttonStart.setEnabled(false);
	_buttonStart.addActionListener( new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		_modifyFlag = false;
		_buttonStart.setEnabled(false);
		applyParameters(false);
	    }
	});
	_choiceVertical = new Choice();
	_choiceVertical.add("Vertical scroll always");
	_choiceVertical.add("Vertical scroll never");
	_choiceVertical.add("Vertical scroll as needed");
	_choiceVertical.select(2);
	_choiceVertical.addItemListener(new ItemListener() {
	    public void itemStateChanged(ItemEvent e) {
		if ( ! _modifyFlag ) {
		    _modifyFlag = true;
		    _buttonStart.setEnabled(true);
		}
	    }
	});
	Panel thePanel = new Panel();
	thePanel.setLayout(new FlowLayout(FlowLayout.CENTER,10,5));
	_buttonModify = new Button("Add datas");
	_buttonModify.addActionListener(new ActionListener() {
	    public void actionPerformed(ActionEvent e) {
		if ( _dataFlag ) {
		    _dataFlag = false;
		    _buttonModify.setLabel("Remove datas");
		    _buttonModify.invalidate();
		    validate();
		    modifyDatas(true);
		}
		else {
		    _dataFlag = true;
		    _buttonModify.setLabel("Add datas");
		    _buttonModify.invalidate();
		    validate();
		    modifyDatas(false);
		}
	    }
	});
	thePanel.add(_buttonModify);
	add(BorderLayout.SOUTH,thePanel);
	thePanel = new Panel();
 	thePanel.setLayout(new FlowLayout(FlowLayout.CENTER,10,5));
	thePanel.add(_choiceHorizontal);
	thePanel.add(_choiceVertical);
	thePanel.add(_buttonStart);
	add(BorderLayout.NORTH,thePanel);
	validate();
	applyParameters(true);
    }

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

    private final GlyphInterface buildBox() {
	final GlyphInterface theContext = new ChangeGraphicalContextAnonymous("italic","blue",null);
	theContext.addChild(makeLine());
	return theContext;
    }

    private final GlyphInterface makeLine() {
	final GlyphInterface theLine = new Horizontal(10);
	theLine.addChild(Atom.newAtom("It's"));
	theLine.addChild(Atom.newAtom('a'));
	final GlyphInterface theContext = new ChangeGraphicalContextAnonymous("big font","red","yellow");
	theLine.addChild(theContext);
	theContext.addChild(Atom.newAtom("wonderful"));
	theLine.addChild(Atom.newAtom("life"));
	theLine.addChild(Atom.newAtom("!!"));
	return theLine;
    }

    private final void applyParameters(boolean aFirstTimeFlag) {
	if ( ! aFirstTimeFlag ) {
	    _facade.disposeWhenInactive();
	    remove(_component);
	}
	_facade = new AWTFacade(getParameters(aFirstTimeFlag));
	_component = _facade.getAwtComponent();
	setDefaultKeyListener(_facade);
	add(BorderLayout.CENTER,_component);
	validate();   
	final GlyphInterface theBox = buildBox();
	initResources();
	PathInterface thePath = new Path();
	thePath.addOperation(new InsertGlyph(theBox,0));
	_facade.buildInit(thePath);
	_facade.buildComplete();
    }

    private final void modifyDatas(boolean anAddFlag) {
	final PathInterface thePath = new LinearPath(0);
	final PathInterface thePathBis = new LinearPath(0);
	thePath.addChild(thePathBis);
	final PathInterface thePathUnder = new LinearPath(4);
	thePathBis.addChild(thePathUnder);
	if ( ! anAddFlag ) {
	    thePathUnder.addOperation(new RemoveGlyph(0));
	}
	else {
	    final GlyphInterface theNewGlyph = new Vertical(30,10);
	    for (int i = 0; i < 5; i++ ) {
		theNewGlyph.addChild(makeLine());
	    }
	    thePathUnder.addOperation(new InsertGlyph(theNewGlyph,0));
	}
	_facade.updateAndRedisplay(thePath);
    }

    private final void initResources() {
	try {
	    _facade.doGetFont("italic",FontFamily.TIMES_ROMAN,FontStyle.BOLD_ITALIC,24,false);
	    _facade.doGetFont("big font",FontFamily.COURIER,FontStyle.BOLD,46,false);
	    _facade.doGetColor("red",BasicColor.RED);
	    _facade.doGetColor("yellow",BasicColor.YELLOW);
	    _facade.doGetColor("blue",BasicColor.BLUE);
	}
	catch ( WrongResourceException anException ) {
	    ;
	}
	initStandardResources(_facade);
    }

    private final FacadeInitializer getParameters(boolean aFirstTimeFlag) {
	FacadeInitializer theParameters = new FacadeInitializer();
	if ( ! aFirstTimeFlag) {
	    _dataFlag = true;
	    _buttonModify.setLabel("Add Datas");
	    switch ( _choiceHorizontal.getSelectedIndex() ) {
	    case 0: {
		theParameters.setHorizontalScrollbarPolicy(ScrollbarPolicy.ALWAYS);
		break;
	    }
	    case 1: {
		theParameters.setHorizontalScrollbarPolicy(ScrollbarPolicy.NEVER);
		break;
	    }
	    case 2: {
		theParameters.setHorizontalScrollbarPolicy(ScrollbarPolicy.AS_NEEDED);
		break;
	    }
	    default: {
		break;
	    }
	    }
	    switch ( _choiceVertical.getSelectedIndex() ) {
	    case 0: {
		theParameters.setVerticalScrollbarPolicy(ScrollbarPolicy.ALWAYS);
		break;
	    }
	    case 1: {
		theParameters.setVerticalScrollbarPolicy(ScrollbarPolicy.NEVER);
		break;
	    }
	    case 2: {
		theParameters.setVerticalScrollbarPolicy(ScrollbarPolicy.AS_NEEDED);
		break;
	    }
	    default: {
		break;
	    }
	    }
	}
	setAppletParameters(theParameters);
	return theParameters;
    }

    private AWTFacade _facade;
    private boolean _modifyFlag;
    private boolean _dataFlag;
    private Choice _choiceHorizontal;
    private Choice _choiceVertical;
    private Button _buttonStart;
    private Button _buttonModify;
    private Component _component;

}