ShapeControl.java

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.util.*;

public class ShapeControl extends JPanel {

    private ButtonListener buttonListener;
    private ShapeMouseListener mouseListener;
    private DrawingBoard drawingboard;
    private GraphicView graphicview;

    public ShapeControl(DrawingBoard db) {

        drawingboard = db;
        setLayout(new BorderLayout());
        graphicview = new GraphicView(db);
        graphicview.setPreferredSize(new Dimension(DrawingBoard.viewSize, DrawingBoard.viewSize));
        add(graphicview, BorderLayout.SOUTH);

        mouseListener = new ShapeMouseListener(db);
        graphicview.addMouseListener(mouseListener);

        drawingboard.addShapeListener(graphicview);

        JButton triangle = new JButton("Draw Triangle");
        JButton circle = new JButton("Draw Circle");
        JPanel buttons = new JPanel();
        buttons.add(triangle);
        buttons.add(circle);
        triangle.setBackground(Color.darkGray);
        circle.setBackground(Color.darkGray);
        this.add(buttons, BorderLayout.NORTH);

        buttonListener = new ButtonListener(db);
        triangle.addActionListener(buttonListener);
        circle.addActionListener(buttonListener);


    }
}

class ButtonListener implements ActionListener {

    private DrawingBoard drawingboard;


    public ButtonListener(DrawingBoard db) {
        drawingboard = db;
    }

    public void actionPerformed(ActionEvent e) {
        if (e.getActionCommand().equals("Draw Triangle")){

            drawingboard.setCirClicked(false);
            drawingboard.setRTClicked(true);
        }
        if(e.getActionCommand().equals("Draw Circle")){
            drawingboard.setRTClicked(false);
            drawingboard.setCirClicked(true);
        }

    }
}

class ShapeMouseListener implements MouseListener {

    private DrawingBoard drawingboard;

    public ShapeMouseListener(DrawingBoard db) {
        drawingboard = db;
    }

    public void mousePressed(MouseEvent e) {
    }

    public void mouseReleased(MouseEvent e) {
    }

    public void mouseClicked(MouseEvent e) {
        if(drawingboard.RTClicked){
            drawingboard.addShape(new RightTriangle(new Point(e.getX(), e.getY()),80));
        }
        if(drawingboard.cirClicked){
            drawingboard.addShape(new Circle(new Point(e.getX(), e.getY()),80));
        }
    }

    public void mouseEntered(MouseEvent e) {
    }

    public void mouseExited(MouseEvent e) {
    }
}