Name: sgC58550 Date: 06/20/97


javac hangs

Compiling the following java code causes javac to hang -- the compliation
never completes.


import java.awt.*;
import java.awt.event.*;

//
//
// TContentPanner
//
//
public class TContentPanner
{
private ScrollPane panner;
private Point pannerLast;
private Point mouseLast;

public TContentPanner( ScrollPane s )
{
panner = s;
panner.addMouseListener(
new MouseAdapter()
{
public void mousePressed( MouseEvent e )
{
if ( ( e.getModifiers() & InputEvent.BUTTON1_MASK ) != 0 &&
inView( e ) )
{
panner.getComponent( 0 ).setCursor(
Cursor.getPredefinedCursor( Cursor.MOVE_CURSOR )
);
mouseLast = e.getPoint();
pannerLast = panner.getScrollPosition();
}
}

public void mouseReleased( MouseEvent e )
{
if ( ( e.getModifiers() & InputEvent.BUTTON1_MASK ) != 0 )
{
panner.getComponent( 0 ).setCursor(
Cursor.getPredefinedCursor( Cursor.HAND_CURSOR )
);
mouseLast = pannerLast = null;
System.out.println( "Last = " + e );
}
}
}
); // end addMouseListener

panner.addMouseMotionListener(
new MouseMotionAdapter()
{
public void mouseDragged( MouseEvent e )
{
if ( mouseLast != null )
{
Point current = e.getPoint();
int dx = current.x - mouseLast.x;
int dy = current.y - mouseLast.y;
System.out.println( "Delta = ( " + dx + ", " + dy + " )" );
mouseLast = current;
pannerLast.translate( dx, dy );
System.out.println( "New Pos = " + pannerLast );
panner.setScrollPosition( pannerLast );
}
}
}
); // end addMouseMotionListener
}

private boolean inView( MouseEvent e )
{
Insets pInsets = panner.getInsets();
Point pViewOrigin = new Point( pInsets.left, pInsets.top );
Rectangle pPort = new Rectangle( pViewOrigin, panner.getViewportSize() );

if ( pPort.contains( e.getPoint() ) )
return true;
else
return false;
}
}



company - M. I. T. -- CECI , email - ###@###.###
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