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import java.awt.BorderLayout;
import java.awt.Canvas;
import java.awt.Color;
import java.awt.Container;
import java.awt.Cursor;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.GridLayout;
import java.awt.Rectangle;
import java.awt.Shape;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.awt.event.MouseMotionAdapter;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Rectangle2D;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.border.TitledBorder;
public class Ellipse extends JFrame {
DrawingCanvas canvas;
JLabel location;
public Ellipse() {
super();
Container container = getContentPane();
canvas = new DrawingCanvas();
container.add(canvas);
JPanel panel = new JPanel();
panel.setLayout(new GridLayout(1, 2));
panel.add(new JLabel("x,y: ", JLabel.RIGHT));
location = new JLabel("");
panel.add(location);
container.add(panel, BorderLayout.SOUTH);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
setSize(600,300);
setVisible(true);
}
public static void main(String arg[]) {
new Ellipse();
}
class DrawingCanvas extends JPanel {
double x, y, w, h;
int x1, y1, x2, y2;
Ellipse2D ellipse;
Ellipse2D selectedShape;
Rectangle2D boundingRec;
Cursor curCursor;
public DrawingCanvas() {
x = 20;
y = 20;
w = 100;
h = 75;
setBackground(Color.white);
addMouseListener(new MyMouseListener());
addMouseMotionListener(new MyMouseMotionListener());
}
public void paint(Graphics g) {
Graphics2D g2D = (Graphics2D) g;
ellipse = new Ellipse2D.Double(x, y, w, h);
g2D.draw(ellipse);
if (boundingRec != null) {
drawHighlightSquares(g2D, boundingRec);
}
if (curCursor != null)
setCursor(curCursor);
}
public void drawHighlightSquares(Graphics2D g2D, Rectangle2D r) {
double x = r.getX();
double y = r.getY();
double w = r.getWidth();
double h = r.getHeight();
g2D.setColor(Color.black);
g2D.fill(new Rectangle.Double(x - 3.0, y - 3.0, 6.0, 6.0));
g2D
.fill(new Rectangle.Double(x + w * 0.5 - 3.0, y - 3.0, 6.0,
6.0));
g2D.fill(new Rectangle.Double(x + w - 3.0, y - 3.0, 6.0, 6.0));
g2D
.fill(new Rectangle.Double(x - 3.0, y + h * 0.5 - 3.0, 6.0,
6.0));
g2D.fill(new Rectangle.Double(x + w - 3.0, y + h * 0.5 - 3.0, 6.0,
6.0));
g2D.fill(new Rectangle.Double(x - 3.0, y + h - 3.0, 6.0, 6.0));
g2D.fill(new Rectangle.Double(x + w * 0.5 - 3.0, y + h - 3.0, 6.0,
6.0));
g2D.fill(new Rectangle.Double(x + w - 3.0, y + h - 3.0, 6.0, 6.0));
}
class MyMouseListener extends MouseAdapter {
public void mousePressed(MouseEvent e) {
if (ellipse.contains(e.getX(), e.getY())) {
selectedShape = ellipse;
if (boundingRec != null)
boundingRec = ellipse.getBounds2D();
displayParameters(selectedShape);
} else {
boundingRec = null;
location.setText("");
}
canvas.repaint();
x1 = e.getX();
y1 = e.getY();
}
public void mouseReleased(MouseEvent e) {
if (ellipse.contains(e.getX(), e.getY())) {
boundingRec = ellipse.getBounds2D();
selectedShape = ellipse;
displayParameters(selectedShape);
}
canvas.repaint();
}
public void mouseClicked(MouseEvent e) {
if (ellipse.contains(e.getX(), e.getY())) {
selectedShape = ellipse;
boundingRec = ellipse.getBounds2D();
displayParameters(selectedShape);
} else {
if (boundingRec != null)
boundingRec = null;
location.setText("");
}
canvas.repaint();
}
}
class MyMouseMotionListener extends MouseMotionAdapter {
public void mouseDragged(MouseEvent e) {
if (ellipse.contains(e.getX(), e.getY())) {
boundingRec = null;
selectedShape = ellipse;
x2 = e.getX();
y2 = e.getY();
x = x + x2 - x1;
y = y + y2 - y1;
x1 = x2;
y1 = y2;
}
if (selectedShape != null)
displayParameters(selectedShape);
canvas.repaint();
}
public void mouseMoved(MouseEvent e) {
if (ellipse != null) {
if (ellipse.contains(e.getX(), e.getY())) {
curCursor = Cursor
.getPredefinedCursor(Cursor.HAND_CURSOR);
} else {
curCursor = Cursor.getDefaultCursor();
}
}
canvas.repaint();
}
}
public void displayParameters(Shape shape) {
double x = selectedShape.getX();
double y = selectedShape.getY();
double w = selectedShape.getWidth();
double h = selectedShape.getHeight();
String locString = "(" + Double.toString(x) + ","
+ Double.toString(y) + ")";
String sizeString = "(" + Double.toString(w) + ","
+ Double.toString(h) + ")";
location.setText(locString);
}
}
}
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