import javafx.scene.canvas.Canvas;
import javafx.scene.canvas.GraphicsContext;
import javafx.scene.control.*;
import javafx.scene.paint.Color;
import javafx.event.ActionEvent;

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.layout.Pane;
import javafx.stage.Stage;

/**
 * Use this template to create Apps with Graphical User Interfaces.
 *
 * @author Dave Slemon
 */
public class CircleManager extends Application {

    // TODO: Instance Variables for View Components and Model
    private Circle circle;
    private GraphicsContext gc;
    private TextField radiusBox;
    private Button radiusButton;


    // TODO: Private Event Handlers and Helper Methods
    public void redrawCircle(ActionEvent e) {
        String str = radiusBox.getText();

        double newRadius = Double.parseDouble(str);
        circle.setRadius(newRadius);

        drawCircle();
    }

    public void drawCircle() {
        gc.setFill(Color.LIGHTBLUE);
        gc.fillRect(0, 0, 400, 200);
        circle.draw(gc);
    }
    /**
     * This is where you create your components and the model and add event
     * handlers.
     *
     * @param stage The main stage
     * @throws Exception
     */
    @Override
    public void start(Stage stage) throws Exception {
        Pane root = new Pane();
        Scene scene = new Scene(root, 400, 400); // set the size here
        stage.setTitle("Circle Manager"); // set the window title here
        stage.setScene(scene);
        // TODO: Add your GUI-building code here
        scene.getStylesheets().add("myStyles.css");


        // 1. Create the model
        circle = new Circle(50,Color.web("blue"),Color.web("white"),200,100);
        // 2. Create the GUI components
        Canvas canvas = new Canvas(400,200);
        radiusButton = new Button("Set Radius");
        radiusBox = new TextField("50");


        // 3. Add components to the root
        root.getChildren().addAll(canvas,radiusButton,radiusBox);
        // 4. Configure the components (colors, fonts, size, location)
        radiusBox.relocate(50,250);
        radiusButton.relocate(200,250);
        // 5. Add Event Handlers and do final setup
        gc = canvas.getGraphicsContext2D();
        drawCircle();
        radiusButton.setOnAction(this::redrawCircle);
        // 6. Show the stage
        stage.show();
    }

    /**
     * Make no changes here.
     *
     * @param args unused
     */
    public static void main(String[] args) {
        launch(args);
    }
}