/**************************************************
*   Author: Morrison
*   Date:  16 Mar 202021
**************************************************/

import javafx.application.Application;
import javafx.application.Platform;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.scene.layout.BorderPane;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.canvas.Canvas;
import javafx.scene.paint.Color;
import javafx.scene.control.Menu;
import javafx.scene.control.MenuBar;
import javafx.scene.control.MenuItem;
import java.util.ArrayList;

public class Squeak extends Application
{
    private ArrayList<Drawable> shapes = new ArrayList<>();
    public Squeak()
    {
    }
    
    @Override
    public void init()
    {
    }

    @Override
    public void start(Stage primary)
    {
        primary.setTitle("Mouse Demonstration");
        BorderPane bp =  new BorderPane();
        primary.setScene(new Scene(bp));
        Canvas canvas = new Canvas(700, 500);
        GraphicsContext pen = canvas.getGraphicsContext2D();
        //Puzzler: turn canvas red
        //pen.setFill(Color.RED);
        //pen.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
        /* puzzler #2
         * when the mouse enters the canvas, turn it red.  
         * when it exits turn it white.
         */
        canvas.setOnMouseEntered( e -> 
        {
            pen.setFill(Color.RED);
            pen.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
            redrawShapes(pen);
        });
        canvas.setOnMouseExited( e -> 
        {
            pen.setFill(Color.WHITE);
            pen.fillRect(0, 0, canvas.getWidth(), canvas.getHeight());
            redrawShapes(pen);
        });
        /*
         * puzzler #3:
         * When the user click on the canvas, have a blue ball of
         * radius 50 pixels appear centered at the click point.
         */
        canvas.setOnMouseClicked( e ->
        {
             Drawable b = new Square(e.getX(), e.getY(), 50, Color.BLUE);
             shapes.add(b);
             b.draw(pen);
        });
        bp.setCenter(canvas);
        bp.setTop(buildMenus());
        primary.show();
    }
    private MenuBar buildMenus()
    {
        MenuBar mbar = new MenuBar();
        Menu colorMenu = new Menu("Color");
        Menu shapeMenu = new Menu("Shape");
        mbar.getMenus().addAll(colorMenu, shapeMenu);
        MenuItem redItem = new MenuItem("RED");
        MenuItem blueItem = new MenuItem("BLUE");
        MenuItem greenItem = new MenuItem("GREEN");
        colorMenu.getItems().addAll(redItem, greenItem, blueItem);
        return mbar;
    }
    private void redrawShapes(GraphicsContext pen)
    {
        for(Drawable b: shapes)
        {
            b.draw(pen);
        }
    }

    @Override
    public void stop()
    {
    }
}