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

package figue.tutorial;

import java.awt.GridLayout;

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

public final class Tutorial_29 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_29.java,v $ $revision$ $Date: 1998/11/02 15:55:56 $ Copyright 1998 INRIA.";

    protected final void initTutorial() {
	setLayout(new GridLayout(1,1));
	_facade = new AWTFacade(getParameters());
	add(_facade.getAwtComponent());
	_facade.addPointingMotionListener(new PointingMotionListenerInterface() {
	    public final void moving(PointingEvent anEvent) {
	    }
	    public final void startDragging(PointingEvent anEvent) {
	    }
	    public final void dragging(PointingEvent anEvent) {
		if ( anEvent.getPath() != null ) {
		    hightlightBox(anEvent.getPath());
		}
	    }
	    public final void stopDragging(PointingEvent anEvent) {
	    }
	});
	setDefaultKeyListener(_facade);
	initResources();
	buildBox();
    }

   private final void hightlightBox(PathInterface aPath) {
	if ( _previousPath != null ) {
	    PathInterface theCurrentPath = _previousPath;
	    while ( theCurrentPath.numberOfChildren() > 0 ) {
		theCurrentPath = theCurrentPath.getChild(0);
	    }
	    theCurrentPath.addOperation(new ShrinkSelection(_selection));
	    _facade.updateSelectionAndRedisplay(_previousPath);
	    _previousPath = null;
	}
	PathInterface theCurrentPath = aPath;
	while ( theCurrentPath.numberOfChildren() > 0 ) {
	    theCurrentPath = theCurrentPath.getChild(0);
	}
	theCurrentPath.addOperation(new ExtendSelection(_selection));
	PathInterface theExtendedPath = new Path();
	theExtendedPath.addChild(aPath);
	_facade.updateSelectionAndRedisplay(theExtendedPath);
	_previousPath = theExtendedPath;
    }

    public final void destroy() {
	_facade.disposeWhenInactive();
	_facade = null;
	_font = null;
	_yellow = null;
	_blue = null;
	_red = null;
	_selection = null;
	super.destroy();
    }

    private final void initResources() {
	try {
	    _font = _facade.doGetFont(null,FontFamily.HELVETICA ,FontStyle.BOLD,24,false);
	    _red = _facade.doGetColor("red",BasicColor.RED);
	    _yellow = _facade.doGetColor("yellow",BasicColor.YELLOW);
	    _blue = _facade.doGetColor(null,0,0,255);
	    _selection = _facade.doGetSelection("highlighted",
						Priority.MEDIUM,
						_facade.doGetColor(null,BasicColor.GREEN),
						null);
	}
	catch ( WrongResourceException anException ) {
	    ;
	} 
	catch ( WrongSelectionException anException ) {
	    ;
	}
	initStandardResources(_facade);
    }
  
   private final void buildBox() {
	final GlyphInterface theContext = new ChangeGraphicalContextAnonymous(_font,_blue,null);
	final GlyphInterface theLine = new Paragraph(10,0,10);
	theContext.addChild(theLine);
	for( int i = 0; i < 25; i++ ) {
	    pushWords(theLine);
	}
	PathInterface thePath = new Path();
	thePath.addOperation(new InsertGlyph(theContext,0));
	_facade.buildInit(thePath);
	_facade.buildComplete();
    }
    
    private final void pushWords(GlyphInterface aGlyph) {
	aGlyph.addChild(Atom.newAtom("It's"));
	aGlyph.addChild(Atom.newAtom('a'));
	final GlyphInterface theContext = new ChangeGraphicalContextAnonymous(null,_red,_yellow);
	aGlyph.addChild(theContext);
	theContext.addChild(Atom.newAtom("wonderful"));
	aGlyph.addChild(Atom.newAtom("life"));
	aGlyph.addChild(Atom.newAtom("!!"));
    }

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

    private AWTFacade _facade;
    private FontInterface _font;
    private ColorInterface _yellow;
    private ColorInterface _blue;
    private ColorInterface _red;
    private SelectionInterface _selection;
    private PathInterface _previousPath = null;

}