/** ~mohammad/public_html/classes/csc241/Tank/displayableTank.java
    Provide the applet with a derivation of Tank that is displayable.  
    displayableTank needs a 200X200 area to draw correctly and the x,y 
    coordinates at the time of construction identify the upper left
    corner of the tank for display on the applet's canvas.  The width
    and height of the applet need to be large enough to accomodate the 
    tank as well as the other componants displayed.

    Add, remove, content, capacity will all be adopted from the 
    Tank class. No need to copy/write anything for them.

    This class has a <i>display</i> method that draws the Tank. Dimension
    as stated before will be 200X200 and water color will be green.  
 **/

import java.awt.*;

public class displayTank extends Tank {
  protected static final Color fillColor = Color.white;
  protected static final Color borderColor = Color.black;
  protected static final Color fluidColor = Color.green;
  protected int height_ = 200;
  protected int width_ = 200;
  protected int x_;
  protected int y_;

  public displayTank(int x, int y) {
    super(); //Invoke the class Tank's constructor
    x_ = x;
    y_ = y;
   }

  public int x () {return x_;}              //return x-coordinate
  public int y () {return y_;}              //return y-coordinate
  public int height () {return height_;}    //return height
  public int width () {return width_;}      //return width


  //Draw the Tank
  public void display (Graphics g) {
    g.setColor(borderColor);
    g.drawRect(x_,y_,width_,height_);
    g.drawRect(x_+1,y_+1,width_-2,height_-2);

    int fluidHeight =  (int)(content_ / capacity * height_);
    g.setColor(fluidColor);
    g.fillRect(x_+2,height_+y_-fluidHeight+2,width_-4,fluidHeight-4);

    int emptyHeight = height_ - fluidHeight;
    g.setColor(fillColor);
    g.fillRect(x_+2,y_+2,width_-4,emptyHeight-4);
  }
}