How to delete Drawn Line in java?
- by Jeyjey
Hello Folks, well this is my code:
import javax.swing.;
import javax.;
import java.awt.;
import java.awt.Color;
import java.awt.Graphics.;
import java.awt.event.*;
import javax.swing.UIManager;
public class SimpleGUI extends JFrame{
public SimpleGUI(){
this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE) ;
}
public void go(){
Drawpanel = new Mypanel();
JFrame frame = new JFrame("Chasing Line");
frame.getContentPane().add(BorderLayout.CENTER, Drawpanel);
frame.setSize(300,300);
frame.setVisible(true);
Drawpanel.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseMoved(java.awt.event.MouseEvent evt) {
DrawpanelMouseMoved(evt);
}
});
}
public void DrawpanelMouseMoved(java.awt.event.MouseEvent evt) {
xpos=evt.getX();
ypos=evt.getY();
System.out.println("Coordinates : X :"+ xpos+"Y: "+ypos);
Drawpanel.paintImage(xpos,ypos);
}
class Mypanel extends JPanel{
public void paintImage(int xpost,int ypost){
Graphics d = getGraphics();
d.setColor(Color.black);
d.drawLine(xpost, 0, xpost, this.getHeight());
d.setColor(Color.red);
d.drawLine(0, ypost, this.getWidth(),ypost);
this.validate();
}
} // end the inner class
public static void main(String[] args){
try {
UIManager.setLookAndFeel("com.sun.java.swing.plaf.windows.WindowsLookAndFeel");
} catch(Exception e) {
System.err.println("Look and feel not set");
}
SimpleGUI win = new SimpleGUI();
win.go();
}
Mypanel Drawpanel;
private int xpos=0;
private int ypos=0;
} // close SimpleGUI class
The problem is how can i delete the old lines?, i mea,make only the current x and y lines appear on the screen, make the intersection between both lines "follow" the mouse pointer.
thanks for any reply.
