IMMAGINE DEL RISULTATO OTTENUTO
/SVOLGIMENTO/
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class TestaMouseInput {
private JFrame f=new JFrame("tracciamento linee rette");
private Panello p=new Panello();
private Point sPoint=new Point();
private Point ePoint=new Point();
private int clickx;
private int clicky;
public TestaMouseInput(){
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setSize(500,500);
f.add(p);
f.addMouseListener(new Linea());
f.addMouseMotionListener(new Linea1());
f.setVisible(true);
}
public class Panello extends JPanel{
public void paintComponent(Graphics g){
String xx="mouse cliccato"+clickx+","+clicky;
g.drawString(xx,10,20);
}
}
public static void main(String[] args){
TestaMouseInput t=new TestaMouseInput();
}
public class Linea implements MouseListener{
public void mousePressed(MouseEvent e){
clickx=e.getX();
clicky=e.getY();
f.repaint();
}
public void mouseReleased(MouseEvent e){
ePoint.x=e.getX()-9;
ePoint.y=e.getY()-34;
f.repaint();
}
public void mouseClicked(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseExited(MouseEvent e){}
}
public class Linea1 implements MouseMotionListener{
public void mouseDragged(MouseEvent e){
ePoint.x=e.getX()-9;
ePoint.y=e.getY()-34;
f.repaint();
}
public void mouseMoved(MouseEvent e){}
}
}
