SOS
can anyone help me sort out the problem i have. i create a square and want to drag it to somewhere according to position of mouse. it works, but not what i want to. Here is the code, please have a look at it.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.geom.*;
import java.util.*;
public class myMouseTest{
public static void main(String[] args){
myMouseFrame mf=new myMouseFrame();
mf.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
mf.setVisible(true);
}
}
class myMouseFrame extends JFrame{
public myMouseFrame(){
setTitle("My testing of mouse event");
setSize(400,500);
myMousePanel mp=new myMousePanel();
add(mp);
}
}
class myMousePanel extends JPanel{
private Rectangle2D temp;
private ArrayList<Rectangle2D> squares;
public myMousePanel(){
squares=new ArrayList<Rectangle2D>();
temp=null;
addMouseListener(new myMouseListener());
addMouseMotionListener(new myMouseMotionListener());
}
private void remove(Rectangle2D t){
squares.remove(t);
repaint();
}
private Rectangle2D find(Point2D t){
for(Rectangle2D s:squares)
if(s.contains(t))
return s;
return null;
}
private void add(Point2D t){
double x=t.getX();
double y=t.getY();
temp=new Rectangle2D.Double(
x-10/2,
y-10/2,
10,
10);
squares.add(temp);
repaint();
}
public void paintComponent(Graphics g){
super.paintComponent(g);
Graphics2D draw=(Graphics2D) g;
for(Rectangle2D t:squares)
draw.draw(t);
}
private class myMouseListener extends MouseAdapter{
public void mousePressed(MouseEvent e){
if((temp=find(e.getPoint()))==null)
add(e.getPoint());
}
public void mouseClicked(MouseEvent e){
if((temp=find(e.getPoint()))!=null && (e.getClickCount()==2))
remove(temp);
}
}
private class myMouseMotionListener implements MouseMotionListener{
public void mouseDragged(MouseEvent e){
if((temp=find(e.getPoint()))!=null){
temp.setFrame(e.getX(),e.getY(),10,10);
}
repaint();
}
public void mouseMoved(MouseEvent e){
if(find(e.getPoint())==null)
setCursor(Cursor.getDefaultCursor());
else
setCursor(Cursor.getPredefinedCursor(Cursor.CROSSHAIR_CURSOR));
}
}
}
