Ellipse

import java.awt.*; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.awt.event.MouseMotionAdapter; import java.awt.geom.CubicCurve2D; import java.awt.geom.Ellipse2D; import java.util.Vector; import javax.swing.JComponent; import javax.xml.ws.Endpoint; public class ViewPane extends JComponent{ final int MAX_POINTS = 20; final int POINT_RADIUS =4; private Point[] endPoints = new Point[MAX_POINTS]; private int num = 0; private Point selectedpoint, secondPoint; private Boolean showpoint = true; public ViewPane(){ addMouseListener(new MouseHandel()); addMouseMotionListener(new MouseMotionHandel()); addKeyListener(new Keyhander()); setFocusable(true); } public static final Color[] PAINT = { Color.blue, Color.red, Color.black }; private int colorPaintIndex = 0; protected void paintComponent(Graphics g){ super.paintComponent(g); Graphics2D g2D=(Graphics2D)g; g2D.setPaint(PAINT[colorPaintIndex]); for(int i=0;i < num -1; i+= 2) { Point p1 = endPoints[i], p2= endPoints[i+1]; Ellipse2D.Double a = new Ellipse2D.Double(p1.x, p1.y, p2.x p1.x, p2.y-p1.y); g2D.draw(a); g2D.fill(a); } if(showpoint)

{ for(int i =0; i< num;i++) { Point p = endPoints[i]; g2D.drawOval(p.x - POINT_RADIUS,p.yPOINT_RADIUS,2*POINT_RADIUS,2*POINT_RADIUS); } } } private class MouseHandel extends MouseAdapter{ public void mousePressed(MouseEvent e){ if(e.getButton()== MouseEvent.BUTTON1){ if(num < MAX_POINTS){ endPoints[num++]= e.getPoint(); repaint(); } } else if(e.getButton()== MouseEvent.BUTTON3){ Point mousepoint = e.getPoint(); selectedpoint = secondPoint = null; for(int i=0; i< num; i++){ if(endPoints[i].distance(mousepoint) <= POINT_RADIUS){ selectedpoint = endPoints[i]; if(e.isControlDown()){ i=(i%2==0)? i+1:i-1; selectedpoint = endPoints[i]; } return ; } } } } } private class MouseMotionHandel extends MouseMotionAdapter{ public void mouseDragged(MouseEvent e){ if(showpoint){ if(selectedpoint != null){ if(e.isControlDown() && secondPoint != null){ int dx=e.getX() - selectedpoint.x, dy =e.getY()-selectedpoint.y; selectedpoint.translate(dx, dy); secondPoint.translate(dx, dy); }

else selectedpoint.move(e.getX(), e.getY()); repaint(); } } } } private class Keyhander extends KeyAdapter{ public void keyPressed (KeyEvent e){ switch(e.getKeyCode()) { case KeyEvent.VK_F1: showpoint =! showpoint; repaint(); break; case KeyEvent.VK_F2: colorPaintIndex = (colorPaintIndex+1)% PAINT.length; repaint(); break; } } public void keyTyped(KeyEvent e){ char inputChar = e.getKeyChar(); if(inputChar == '\b'){ } } } }