[gui][patch] fixes to viewport

[graydon hoare]

hi,

I committed this patch to the java-gui-branch. it fixes viewport layout 
calculations so that they behave more like sun's swing (not like sun's 
documentation, which plainly lies!)

it also includes some small fixes to missing methods and properties 
elsewhere in swing.

-graydon

2004-06-15  Graydon Hoare  <graydon@redhat.com>

	* javax/swing/ImageIcon.java (ImageIcon): New constructor.
	* javax/swing/JFrame.java (defaultLookAndFeelDecorated): New property.
	* javax/swing/JViewport.java
	(getExtentSize): Return size rather than preferred size.
	(toViewCoordinates): New methods.
	(getViewSize): Return size rather than preferred size.
	(setViewSize): Note view size as set.
	* javax/swing/ViewportLayout.java (layoutContainer): Reimplement.
	* javax/swing/plaf/basic/BasicScrollBarUI.java
	(getPreferredSize): Don't redo layout.
	* javax/swing/plaf/basic/BasicViewportUI.java
	(paint): Translate image properly and eat exceptions.
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