import objectdraw.*;
import java.awt.*;

/**
 * Draws broccoli recursively.
 */
public class BroccoliEvents extends FrameWindowController {

    private static final int WINDOW_SIZE = 600;

    // coordinates for start of broccoli (base point)
    // and length of the first (longest) stem
    private static final Location BOTTOM_BROCCOLI_STEM = new Location(300, 500);
    private static final double STEM_LENGTH = 100;   

    // Broccoli object to be drawn and moved
    private Broccoli veggie;   

    // whether broccoli was pressed
    private boolean broccoliPressed;

    // Where mouse was before last mouse event
    private Location lastLocation;  

    // create the broccoli
    public void begin() {
        resize(WINDOW_SIZE, WINDOW_SIZE);

        veggie = new Broccoli(BOTTOM_BROCCOLI_STEM, STEM_LENGTH, Math.PI / 2.0, canvas);

        broccoliPressed = false;

    }

    // Get ready to move broccoli
    public void onMousePress(Location point) {

        if (veggie.contains(point)) {
            broccoliPressed = true;
            lastLocation = point;
        }

    }

    // Get ready to move broccoli
    public void onMouseRelease(Location point) {
        broccoliPressed = false;
    }

    // Drag the broccoli around
    public void onMouseDrag(Location point) {

        if (broccoliPressed) {
            veggie.move(point.getX() - lastLocation.getX(), 
                point.getY() - lastLocation.getY());
            lastLocation = point;
        }
    }
 
}