// AddRect.java
// Command class to add a Rect object to the drawing.

// Written by THC for CS 5 Lab Assignment 3.

import java.awt.*;

public class AddRect extends Command {
  private Point firstPoint; // starting corner for the Rect

  // When the mouse is pressed, remember its position, create a new Rect with
  // the mouse position as its upper left and zero width and height, and add
  // the new Rect to the front of the drawing.
  public void executePress(Point p, Drawing dwg) {
    firstPoint = p;
    Rect r = new Rect(p.x, p.y, 0, 0, dwg.getColor());
    dwg.add(r);
  }

  // When the mouse is dragged, make a new Rect with the original press
  // position as one corner and the current mouse position as the
  // opposite corner, and have this new Rect replace the one that is
  // currently at the front of the drawing.
  public void executeDrag(Point p, Drawing dwg) {
    Rect r = new Rect(Math.min(p.x, firstPoint.x), 
        Math.min(p.y, firstPoint.y), Math.abs(p.x - firstPoint.x),
        Math.abs(p.y - firstPoint.y), dwg.getColor());
    dwg.replaceFront(r);
  }
}