To override the default mouse behavior in a 2D VisAD window,
I was advised here to take a look at
http://www.unidata.ucar.edu/glimpse/visad-lis/2255
I believe I have reproduced the logic of that example below,
and so I wonder why I got the following run-time error:
"Exception in thread "main" visad.VisADError: cannot construct
class MouseSupercede at visad.java2d.DefaultDisplayRendererJ2D.
createSceneGraph(DefaultDisplayRenderer"...[etc.]
---------------------- EXAMPLE: -----------------
import visad.*;
import visad.java2d.*;
import java.rmi.RemoteException;
import java.awt.*;
import javax.swing.*;
public class a11 {
public
a11 (String[] args) throws RemoteException, VisADException {
DisplayRendererJ2D DR
new DefaultDisplayRendererJ2D(MouseSuperceded.class);
DisplayImpl theDisp = new DisplayImplJ2D("theDisp", DR);
}
public static void main(String[] args)
throws RemoteException, VisADException {
new a11(args);
}
}
class DeadMouse extends MouseHelper {
public DeadMouse(DisplayRenderer DR, MouseBehavior MB) {
super(DR, MB);
}
}
class MouseSuperceded extends MouseBehaviorJ2D {
public MouseSuperceded(DisplayRendererJ2D dRd {
super(dRd, DeadMouse.class);
}
}
---------------- end of example -----------------------
As a sanity check, if I replace the line
new DefaultDisplayRendererJ2D(MouseSuperceded.class);
with
new DefaultDisplayRendererJ2D
(visad.java2d.MouseBehaviorJ2D.class)
I don't get the error.
