// AddLine.java
// Command class to add a Segment object to the drawing.

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

import java.awt.*;

public class AddLine extends Command {
  private int x1, y1; // starting endpoint for the Segment

  // When the mouse is pressed, remember its position, create a new Segment
  // with coincident endpoints, and add the new Segment to the front of the
  // drawing.
  public void executePress(Point p, Drawing dwg) {
    x1 = p.x;
    y1 = p.y;
    Segment s = new Segment(x1, y1, x1, y1, dwg.getColor());
    dwg.add(s);
  }

  // When the mouse is dragged, make a new Segment with the original press
  // position and the current mouse position, and have this new Segment
  // replace the one that is currently at the front of the drawing.
  public void executeDrag(Point p, Drawing dwg) {
    Segment s = new Segment(x1, y1, p.x, p.y, dwg.getColor());
    dwg.replaceFront(s);
  }
}