ScrollPane.java: Wrote.

* java/awt/ScrollPane.java: Wrote.
	* java/awt/peer/ScrollPanePeer.java (setBlockIncrement): New
	method.

	* java/awt/Panel.java (Panel()): Fixed.

	* java/awt/Component.java (isShowing): Return false if no peer
	exists, and true if component is visible and no parent exists.
	(getLocationOnScreen): Wrote.
	(getPreferredSize): Removed FIXME comment.
	(getMinimumSize): Likewise.
	(getAlignmentX, getAlignmentY): Wrote.
	(list): Wrote.
	(requestFocus): Wrote.
	(transferFocus): Wrote.
	(findNextFocusComponent): New method.
	(hasFocus()): Wrote.
	(checkImage): Wrote.
	(enableEvents): Call setEventMask on the peer.

	* java/awt/Container.java (list): Use super.list() to print self.
	(findNextFocusComponent): New method.
	(setLayout): Call invalidate.
	(findComponentAt): Wrote.

From-SVN: r38639

libjava/java/awt/peer/ComponentPeer.java

@@ -30,6 +30,8 @@ public interface ComponentPeer
   Dimension getMinimumSize();
   Dimension getPreferredSize();
   Toolkit getToolkit();
+  // The JCL says that handleEvent returns boolean.  However, we've
+  // experimentally determined that it in fact actually returns void.
   void handleEvent(AWTEvent e);
   boolean isFocusTraversable();
   void paint(Graphics graphics);