import objectdraw.*;

import java.awt.*;

/**
 * Program to demonstrate dragging different kinds
 * of objects by using an interface.
 */
public class CircleSquare extends WindowController {
    public static final int SQUARE_LEFT = 100;
    public static final int SQUARE_TOP = 100;
    public static final int SIZE = 50;
    public static final int CIRCLE_LEFT = 200;
    public static final int CIRCLE_TOP = 200;

    // The object being dragged
    private DrawableInterface draggedItem;
    
    // Are we dragging anything?
    private boolean dragging;

    private Location lastPoint;

    // Two objects to drag around
    private FilledRect blueItem;
    private FilledOval redItem;
    
    public void begin() {
        blueItem = new FilledRect(SQUARE_LEFT, SQUARE_TOP, SIZE, SIZE, canvas);
        blueItem.setColor(Color.blue);
        redItem = new FilledOval(CIRCLE_LEFT, CIRCLE_TOP, SIZE, SIZE, canvas);
        redItem.setColor(Color.red);
    }

    public void onMousePress(Location point) {
        lastPoint = point;

        if (blueItem.contains(point)) {
            draggedItem = blueItem;
            dragging = true;
        } else if (redItem.contains(point)) {
            draggedItem = redItem;
            dragging = true;
        } 
    }

    public void onMouseDrag(Location point) {
        if (dragging) {
            draggedItem.move(point.getX() - lastPoint.getX(),
                             point.getY() - lastPoint.getY());
            lastPoint = point;
        }
    }

    public void onMouseRelease(Location point) {
        dragging = false;
    }
}