/*******************************************************************
   Copyright (c) 2001-2010 Apprisant Technologies Inc.
   All rights reserved.

   Apprisant Technologies permits non-exclusive royalty free use,
   copying and modification of this demo program source code
   for the purposes of evaluating the Apprisant Toolkit or building
   applications that use it.
   
   This software and documentation is provided "AS IS".  APPRISANT
   TECHNOLOGIES DISCLAIMS ANY REPRESENTATIONS AND WARRANTIES, INCLUDING
   BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY AND
   FITNESS OF THIS PRODUCT FOR ANY PARTICULAR PURPOSE.  APPRISANT
   TECHNOLOGIES SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY ANY
   PARTY, INCLUDING LOST PROFITS, ARISING FROM THE USE OF THIS
   SOFTWARE, ITS DOCUMENTATION, OR ITS DERIVATIONS.

********************************************************************/

package schedule;

import java.awt.*;
import java.awt.geom.*;
import java.io.*;
import apprisant.diagram.*;
import apprisant.schedule.*;


/* The display element class for the Schedule demo.  This class makes
   the data available in the format required by the model, and builds
   the arrows shown in the bookings.

   This class extends WeeklyElement, which is the display element
   class used by the WeeklyModel.

   The element factory that instantiates the display elements is a
   nested class at the end of this file, and is registered with the
   element model in the Schedule class. */


public class BookingElement extends WeeklyElement {

    // Display attribute to store the arrow
    static final String ARROW = "arrow";

    // Geometry values for the arrows
    static final float ARROWHEAD_HEIGHT = 16;
    static final float ARROW_TOP = 2;
    static final float ARROW_LEFT = .25f * Schedule.DAY_WIDTH;
    static final float ARROW_RIGHT = .75f * Schedule.DAY_WIDTH;

    // Precalculated arrows for the sizes we will need, to be shared
    // by the elements.

    static GeneralPath ARROW_60 = makeArrow(60);
    static GeneralPath ARROW_90 = makeArrow(90);
    static GeneralPath ARROW_120 = makeArrow(120);


    public BookingElement (Object key, Object dataObject) {
	super(key, dataObject);
    }

    /** Data value required by WeeklyModel */
    public int getPeriodIndex() {
	Booking booking = (Booking) getDataObject();
	return (booking != null) ? booking.getDay().ordinal() : -1;
    }

    /** Data value required by WeeklyModel, in interval units (ie. hours) */
    public double getStart() {
	Booking booking = (Booking) getDataObject();
	return (booking != null) 
	    ? booking.getStartTime() - ScheduleData.HOUR_START 
	    : ScheduleData.HOUR_END;
    }
	
    /** Data value required by WeeklyModel, in interval units (ie. hours) */
    public double getDuration() {
	Booking booking = (Booking) getDataObject();
	return (booking != null) ? booking.getDuration() / 60.0 : 0;
    }
	

    /** Called by the model when the element is positioned or the data
        object is set or updated. This method is also overridden by
        WeeklyElement to calculate the rectangle representing the
        booking. */

    @Override
    public void update() {

	if (getModel() == null || ! getModel().isValid()) return;
	Booking booking = (Booking) getDataObject();
	if (booking == null) return;

	// Have WeeklyElement calculate the position and rectangle
	super.update();

	// Set the arrow
	int duration = booking.getDuration();
	if (duration <= 60) {
	    setAttribute(ARROW, ARROW_60);
	} else if (duration <= 90) {
	    setAttribute(ARROW, ARROW_90);
	} else {
	    setAttribute(ARROW, ARROW_120);
	}
    }


    /** Helper method to construct the arrow for the given duration in
        minutes. The arrow will be displayed relative to the element's
        point, which WeeklyElement sets to the upper left corner of
        the rectangle. */

    static GeneralPath makeArrow (int duration) {

	float height = (duration / 60f) * Schedule.HOUR_HEIGHT;

	GeneralPath p = new GeneralPath();
	p.moveTo(ARROW_LEFT, ARROW_TOP);
	p.lineTo(ARROW_RIGHT, ARROW_TOP);
	p.lineTo(ARROW_RIGHT, height - ARROWHEAD_HEIGHT);
	p.lineTo(Schedule.DAY_WIDTH - Schedule.INSET, 
		 height - ARROWHEAD_HEIGHT);
	p.lineTo(Schedule.DAY_WIDTH / 2f, height - Schedule.INSET - 1);
	p.lineTo(Schedule.INSET, height - ARROWHEAD_HEIGHT);
	p.lineTo(ARROW_LEFT, height - ARROWHEAD_HEIGHT);
	p.closePath();

	return p;
    }


    /* Element factory class to instantiate WeeklyElements. */

    public static class Factory implements ElementFactory {

	public Factory() { }

	public BookingElement createElement (Object key, Object data) {
	    return new BookingElement(key, data);
	}
    }

}