//package FODpack;

import java.awt.*;

/**
 * Holds and displays an integer value between 0-100;
 * @author Torbjörn Nilsson
 * @version 1.1
*/
public class ValueBar extends Panel {
//  Panel cv;
  static final int HEIGHT = 18;
  static final int WIDTH = 270;
  static final int BAR_START = 111;
  static final int BAR_SIZE = WIDTH-115;
  
  private int value = 0;
  private int oldValue = 0;
  private boolean editable = false;
  private String label="";
  
/** 
 * Default constructor. Do not use this one.
*/
  public ValueBar() {
    super();
    resize(WIDTH, HEIGHT);
  }

/** 
 * The contructor you should use! The lines below describes the arguments:
 * label  What the bar represents.
 * value  Initial value(0-100).
 * edit   If it is possible to edit this value by clicking on the bar with the mouse.
*/ 
  public ValueBar(String label, int value, boolean edit) {
    super();
    editable = edit;
    this.label = label;
    setValue(value);

//    setLayout(new GridLayout(2,1));
//    add(new Label(label)); //, Label.LEFT));
    resize(WIDTH, HEIGHT);
  }

/*
  public void update(Graphics g) {    //override
    
    paint(g);
  }
*/

/**
 * Draw the bar that represents the value stored in this object.
*/
  public void paint(Graphics g){

//    resize(WIDTH, HEIGHT);
    Dimension d = size();
    setBackground(Color.white);
//    g.setColor(Color.black);
//    g.drawRect(0,0,d.width-1, d.height-1);      //contour component
    g.setColor(Color.darkGray);
    g.drawLine(0,0,d.width-1,0);
    g.drawLine(0,0,0,d.height-1);
    g.setColor(Color.lightGray);
    g.drawLine(0,d.height-1,d.width-1,d.height-1);
    g.drawLine(d.width-1,0,d.width-1,d.height-1);

//    int wid = d.width-113;
    g.setColor(Color.black);
    g.drawRect(BAR_START-1,2,BAR_SIZE+1,d.height-5);  //contour bar

    int bar = BAR_SIZE*value/100;
    g.setColor(Color.red);
    g.fillRect(BAR_START,3,bar,d.height-6);  // bar

    int oldx = BAR_START+BAR_SIZE*oldValue/100;
    g.setColor(Color.green);
    g.drawLine(oldx, 3 , oldx, d.height-4);
    g.drawLine(oldx+1, 3 , oldx+1, d.height-4);

    g.setColor(Color.black);
    g.drawString(label,3,13);
//    System.out.println("hej");

  }

/**
 * If the ValueBar object is editable, then this method
    will update the internal value when the bar is clicked.
*/
  public boolean mouseDown(Event e, int x, int y) {
//    System.out.println("pressed! "+x+" "+y);
    if ( editable && x<=(BAR_START+BAR_SIZE) && x>=BAR_START ) {
      setValue( (x-BAR_START)*100/BAR_SIZE);
      repaint();
//      System.out.println(value);
    return true; 
    } 
    else
      return false;
  }
  
/**
 * @return Return the value currently stored in this object.
*/
  public int getValue() {
    return value;
  }

/**
 * Set the value of this object. Checks that value is in range 0-100.
 * If out of range the value is not changed, but error message is printed.
*/
  public void setValue(int x) {
    oldValue = value;
    value = x;
    if(value  < 0)
      value = 0;
    if(value >100)
      value = 100;
    
    repaint();
  }

/**
 * Use the main method to test what this class can do and looks like.
*/
  public static void main(String[] a) {

    Frame f = new Frame("ValueBar-test");
    f.resize(400,300);
    ValueBar vb = new ValueBar("Developement", 50, false);
    f.add(vb);
    vb.move(20,40);
    vb =new ValueBar("Mana", 75, true);
    f.add(vb);
    vb.move(20,60);
    f.show();

//    (f.getGraphics()).drawString("pelle",10,100);


  }

}