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

// drawing a road with some lane markers
public class Lanes extends FrameWindowController {

    // number and size of lanes
    private static final int LANES = 2;
    private static final double LANEWIDTH = 50;

    // position and size of road
    private static final double ROADLEFT = 100;
    private static final double ROADWIDTH = LANES*LANEWIDTH;

    // position and dimensions of white lines
    private static final double LINESWIDTH = 10;
    private static final double LINESLENGTH = 40;
    private static final double LINESLEFT = ROADLEFT + LANEWIDTH - LINESWIDTH / 2;
    private static final double LINESPACING= 1.7 * LINESLENGTH;

    // draw the initial roadway
    public void begin() {
        new FilledRect(ROADLEFT, 0, ROADWIDTH, canvas.getHeight(), canvas);
    }
    
    // draw the next lane marker when the mouse is pressed
    public void onMousePress(Location point) {
        
        // the y coordinate of the next lane marker to draw
        double nextLineTop = 0;
        
        // have we drawn all the lines?
        while (nextLineTop < canvas.getHeight()) {
            
            // draw the next line
            FilledRect nextLine = new FilledRect(LINESLEFT, nextLineTop, LINESWIDTH, LINESLENGTH, canvas);
            nextLine.setColor(Color.WHITE);
            
            // update the Y coordinate for the next line
            nextLineTop = nextLineTop + LINESPACING;
        }
        
    }

    // clear screen and redraw roadway
    public void onMouseExit(Location point) {
        canvas.clear();
        new FilledRect(ROADLEFT, 0, ROADWIDTH, canvas.getHeight(), canvas);
    }

}