Creating a user defined control in java using java Beans

Question

Hi,
I want to create a user defined control for drawing a line like a line control which is used in Visual Basic. I have created a program which will be drawing a line in runtime..but i cant use the same program in the beans to act as a user defined control to work as a line control ..b'coz i extend the class with JPanel..so when i drag and drop the control i am getting the panel only...so can u give me some ideas to create the line control...i am attaching the code which i created ...so pls do make some modification or correction to work as a line control....
Thank u in advance..........
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.awt.image.BufferedImage;
import javax.swing.*;
import javax.swing.event.*;
public class Line extends JPanel
BufferedImage image;
Color color;
Stroke stroke;
Point start = new Point();
Point end = new Point();
public Line()
color = Color.blue;
stroke = new BasicStroke(1f, BasicStroke.CAP_BUTT,
BasicStroke.JOIN_MITER);
protected void paintComponent(Graphics g)
super.paintComponent(g);
if(image == null)
initImage();
g.drawImage(image, 0, 0, this);
// Draw temp line over image.
Graphics2D g2 = (Graphics2D)g;
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(Color.red);
g2.drawLine(start.x, start.y, end.x, end.y);
public void setTempPoints(Point p1, Point p2) {
start = p1;
end = p2;
repaint();
public void draw(Point p1, Point p2)
Graphics2D g2 = image.createGraphics();
g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
RenderingHints.VALUE_ANTIALIAS_ON);
g2.setPaint(color);
g2.setStroke(stroke);
g2.drawLine(p1.x, p1.y, p2.x, p2.y);
g2.dispose();
start = end;
repaint();
private void clearImage()
Graphics g = image.getGraphics();
g.setColor(getBackground());
g.fillRect(0, 0, image.getWidth(), image.getHeight());
g.dispose();
repaint();
private void initImage()
int w = getWidth();
int h = getHeight();
image = new BufferedImage(w, h, BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = image.createGraphics();
g2.setPaint(getBackground());
g2.fillRect(0,0,w,h);
g2.dispose();
public static void main(String[] args)
Line wbclient = new Line();
DrawingListener listener = new DrawingListener(wbclient);
wbclient.addMouseListener(listener);
wbclient.addMouseMotionListener(listener);
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(wbclient);
f.setSize(400,400);
f.setLocation(200,200);
f.setVisible(true);
class DrawingListener extends MouseInputAdapter
Line wbclient;
Point start;
Point end;
final int MIN_DIST = 5;
public DrawingListener(Line fh)
this.wbclient = fh;
public void mousePressed(MouseEvent e)
start = e.getPoint();
public void mouseReleased(MouseEvent e)
end=e.getPoint();
if(start.distance(end) > MIN_DIST)
wbclient.draw(start, end);
public void mouseDragged(MouseEvent e)
wbclient.setTempPoints(start, e.getPoint());
}

Answer 1

%TYPE is PL/SQL syntax, which thus cannot be used inside SQL.
The other way around, SQL can be used inside PL/SQL.
Regards,
K.