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

// A program that draws a grid of thick black lines
// on the canvas
public class DrawingGrid1 extends FrameWindowController {

    private static final int THICKNESS = 5;    // Thickness of FilledRects

    // Coordinates of the next two rectangles to draw
    private int verticalCornerX, horizontalCornerY;

    // Set coordinates to position first pair of rectangles at upper
    // left corner of the canvas
    public void begin() {
        horizontalCornerY = 0;
        verticalCornerX = horizontalCornerY;
    }

    // Draw a pair of rectangles and move coordinates so that the next
    // pair of rectangles will appear further down and to the right
    public void onMousePress(Location point) {
        new FilledRect(verticalCornerX, 0, THICKNESS, canvas.getHeight(), canvas);
        new FilledRect(0, horizontalCornerY, canvas.getWidth(), THICKNESS, canvas);

        verticalCornerX = verticalCornerX + 2 * THICKNESS;
        horizontalCornerY = horizontalCornerY + 2 * THICKNESS;
    }
}