package gui.elements;

//import java.awt.*;
import java.awt.geom.*;

/**
 * <p>Title: Java Media for Experiencing Sensation and Perception</p>
 * <p>Description: draws an arrow - use negative values for upward arrows</p>
 * <p>Copyright: Copyright (c) 2002</p>
 * <p>Company: Hanover College</p>
 * @author John H. Krantz, Ph.D.
 * @version 0.1
 */

public class Arrow {

  private int height = 200;
  private double headAngle = 30;
  private int headLength = 35;
  private int startX = 0;
  private int startY = 0;
  public final boolean DRAWUP = true;
  public final boolean DRAWDOWN = false;
  private boolean up = DRAWDOWN;

  public Arrow() {
  }

  // set methods
  public void setHeight(int h) {
    height = (h >= 0 ? h : 200);
  }
  public void setHeadAngle(double a){
    headAngle = (a > 0 & a <= 90 ? a : 30);
  }
  public void setHeadLength(int len){
    headLength = (len >= 0 ? len : 35);
  }
  public void setStart(int x, int y){
    startX = x;
    startY = y;
  }
  public void setDirection(boolean dir){
    up = dir;
  }
  // get methods
  public int getHeight()         { return height;}
  public double getHeadAngle()   { return headAngle; }
  public int getHeadLength()     { return headLength; }
  public int getStartX()         { return startX; }
  public int getStartY()         { return startY; }
  public boolean getDirection()  { return up; }

  public GeneralPath formArrow(){
    GeneralPath temp = new GeneralPath();

    // set the direction
    float hl = headLength;
    float len = height;
    if (up){
      hl = hl*-1;
      len = len*-1;
    }
    temp.moveTo(startX,startY);
    temp.lineTo(startX,startY+len);
    temp.lineTo(startX+(float)(hl*
                Math.sin(headAngle*Math.PI/180.0)),
                startY+len - (float)(hl*
                Math.cos(headAngle*Math.PI/180.0)));
    temp.moveTo(startX,startY+len);
    temp.lineTo(startX-(float)(hl*
                Math.sin(headAngle*Math.PI/180.0)),
                startY+len - (float)(hl*
                Math.cos(headAngle*Math.PI/180.0)));
    return temp;
  }
}