MouseMoveScale.java Source code

Introduction

Here is the source code for MouseMoveScale.java

Source

import java.awt.Color;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.RenderingHints;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseWheelEvent;
import java.awt.event.MouseWheelListener;
import java.awt.geom.Rectangle2D;

import javax.swing.JFrame;
import javax.swing.JPanel;

public class MouseMoveScale extends JPanel {
    private Rectangle2D.Float myRect = new Rectangle2D.Float(50, 50, 50, 50);

    MovingAdapter ma = new MovingAdapter();

    public MouseMoveScale() {
        addMouseMotionListener(ma);
        addMouseListener(ma);
        addMouseWheelListener(new ScaleHandler());
    }

    public void paint(Graphics g) {
        super.paint(g);

        Graphics2D g2d = (Graphics2D) g;

        g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);

        g2d.setColor(new Color(0, 0, 200));
        g2d.fill(myRect);
    }

    class MovingAdapter extends MouseAdapter {

        private int x;

        private int y;

        public void mousePressed(MouseEvent e) {
            x = e.getX();
            y = e.getY();
        }

        public void mouseDragged(MouseEvent e) {

            int dx = e.getX() - x;
            int dy = e.getY() - y;

            if (myRect.getBounds2D().contains(x, y)) {
                myRect.x += dx;
                myRect.y += dy;
                repaint();
            }
            x += dx;
            y += dy;
        }
    }

    class ScaleHandler implements MouseWheelListener {
        public void mouseWheelMoved(MouseWheelEvent e) {

            int x = e.getX();
            int y = e.getY();

            if (e.getScrollType() == MouseWheelEvent.WHEEL_UNIT_SCROLL) {

                if (myRect.getBounds2D().contains(x, y)) {
                    float amount = e.getWheelRotation() * 5f;
                    myRect.width += amount;
                    myRect.height += amount;
                    repaint();
                }
            }
        }
    }

    public static void main(String[] args) {
        JFrame frame = new JFrame("Moving and Scaling");
        MouseMoveScale m = new MouseMoveScale();
        m.setDoubleBuffered(true);
        frame.add(m);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setSize(300, 300);
        frame.setLocationRelativeTo(null);
        frame.setVisible(true);
    }
}