2004-03-12 Graydon Hoare <graydon@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java: Clipping fixes.
	* javax/swing/JComponent.java (paint): Use persistent double buffer.
	* javax/swing/JList.java (ListListener): Revalidate on changes.
	* javax/swing/JScrollPane.java: Reimplement.
	* javax/swing/JViewport.java: Reimplement.
	* javax/swing/ScrollPaneLayout.java: Reimplement.
	* javax/swing/ViewportLayout.java: Tidy up.
	* javax/swing/plaf/basic/BasicButtonListener.java: Remove printlns.
	* javax/swing/plaf/basic/BasicScrollPaneUI.java: Reimplement.
	* javax/swing/plaf/basic/BasicSliderUI.java: Handle missing labels.
	* javax/swing/plaf/basic/BasicViewportUI.java: Implement in terms of
	backing store only.

2004-03-11  Thomas Fitzsimmons  <fitzsim@redhat.com>

	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkWindowPeer.c
	(window_wm_protocols_filter): New function.
	(window_focus_in_cb): Remove function.
	(window_focus_out_cb): Likewise.
	(window_focus_or_active_state_change_cb): New function.
	(create): Add filter that removes WM_TAKE_FOCUS client messages.
	(connectSignals): Don't attach handlers to focus-in-event or
	focus-out-event signals.  Handle notify signal.

2004-03-11  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GtkCheckboxPeer.java
	(gtkSetLabel): New native method declaration.
	(setLabel): Use gtkSetLabel.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkCheckboxPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkCheckboxPeer_gtkSetLabel): New method.

2004-03-10  Thomas Fitzsimmons  <fitzsim@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics.java (setColor): Default to
	black when color argument is null.

2004-03-10  Kim Ho  <kho@redhat.com>

	* java/awt/Container.java: Remove check
	for drag events.

2004-03-10  Kim Ho  <kho@redhat.com>

	* java/awt/Container.java: (visitChild):
	Remove candidate clip. Use the component
	clip to intersect.
	* gnu/java/awt/peer/gtk/GtkComponentPeer.java:
	(handleEvent): Use the PaintEvent's clip.

2004-03-10  Kim Ho  <kho@redhat.com>

	* gnu/java/awt/peer/gtk/GtkComponentPeer.java:
	(handleEvent): Don't set the clip for the
	Graphics object.

2004-03-09  Graydon Hoare  <graydon@redhat.com>

	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGlyphVector.c:
	Fix double <-> fixed macros, reset font transform.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkClasspathFontPeerMetrics.c:
	Likewise.

2004-03-09�� Kim Ho  <kho@redhat.com>

	* java/awt/Container.java: (visitChild): Move
	the x and y coordinate of the component rectangle
	to correct position.
	(handleEvent): Forward drag events to the pressed
	component.
	* javax/swing/plaf/basic/BasicScrollBarUI.java:
	Fix comments.
	(ArrowButtonListener::mousePressed): Stop the
	existing timer.
	(mouseDragged): Implement.
	(TrackListener::mousePressed): Only react if
	the press doesn't occur on the thumb, otherwise
	just set the offset.
	(TrackListener::mouseReleased): Unset the isAdjusting
	value.
	(createIncreaseIcon): Switch icon.
	(createDecreaseIcon): Switch icon.
	(calculatePreferredSize): Use width.
	(getThumbBounds): Use the top as the lower value.
	(layoutVScrollBar): Switch the button locations.
	(paintIncreaseHighlight): Paint correct side of thumb.
	(paintDecreaseHighlight): ditto.
	(valueForYPosition): Use top as the lower value.
	* javax/swing/plaf/basic/BasicSliderUI.java:
	Fix comments.
	(mouseDragged): Implement.
	(mousePressed): Only react when the thumb isn't
	pressed, otherwise just set offset.
	(mouseReleased): Handle a release of the thumb.
	(scrollDueToClickInTrack): Stop the timer first.
	* javax/swing/JProgressBar.java:
	(setString): Fix change condition.
	* javax/swing/JSeparator.java:
	Remove println's.

2004-03-08  David Jee  <djee@redhat.com>

	* java/awt/image/AffineTransformOp.java:
	(filter): Use Graphics2D interface instead of directly using the
	GdkGraphics2D peer.

2004-03-05  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GtkButtonPeer.java
	(handleEvent): Action events are generated upon MOUSE_RELEASED.
	* java/awt/Container.java
	(acquireComponentForMouseEvent): Fixed.
	(handleEvent): Fixed.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkEvents.c
	(state_to_awt_mods_with_button_states): New method.
	(pre_event_handler): Fixed mouse event generation.

2004-03-05  Olga Rodimina  <rodimina@redhat.com>

	gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(GdkGraphics2D (BufferedImage)): Initialize
	pixmap associated with specified BufferedImage.
	(setPaint): Changed implementation of Texture
	Paint to use AffineTransformOp.
	* java/awt/image/AffineTransformOp.java
	(createCompatibleDestRaster): Throw RasterFormatException
	if resulting width or height of raster is 0.

2004-03-04  Olga Rodimina  <rodimina@redhat.com>

	* java/awt/image/AffineTransformOp.java:
	Removed unnecessary field interpolationType.
	Formatted some of the lines to be consistent with
	the GNU style.
	(AffineTransformOp): Create new RenderingHints
	containing specified interpolation type.
	(createCompatibleDestImage): Implemented.
	(createCompatibleDestRaster): Implemented.
	(filter): Implemented.
	(getBounds2D(BufferedImage)): Implemented.
	(getBounds2D(Raster)): Implemented.
	(getInterpolationType): Get interpolation value from
	rendering hints.

2004-03-04  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GtkContainerPeer.java
	(setFont): Check if child peers are null.

2004-03-04  Graydon Hoare  <graydon@redhat.com>

	* testsuite/lib/libjava.exp (libjava_find_lib): Don't include
	.libs in -L option.
	(libjava_arguments): Add new libraries to argument list.

2004-03-04  Tom Tromey  <tromey@redhat.com>

	* Makefile.in: Rebuilt.
	* Makefile.am (toolexeclib_LTLIBRARIES): Added lib-java-awt.la,
	lib-javax-swing.la, lib-java-applet.la, lib-java-beans.la.
	(misc_java_source_files): New macro.
	(swing_java_source_files): Likewise.
	(awt_java_source_files): Pruned.
	(applet_java_source_files): New macro.
	(beans_java_source_files): Likewise.
	(lib_java_applet_la_SOURCES): Likewise.
	(lib_java_awt_la_SOURCES): Likewise.
	(lib_javax_swing_la_SOURCES): Likewise.
	(lib_java_beans_la_SOURCES): Likewise.
	(all_java_object_files): Likewise.
	(%.lo: %.java): Use all_java_object_files.
	(all_java_source_files): Added new _SOURCES.
	(ordinary_java_source_files): Removed awt_java_source_files.

2004-03-02  Olga Rodimina  <rodimina@redhat.com>

	* Makefile.am: Added java/awt/image/AffineTransformOp.java
	* Makefile.in: Re-generated.
	* java/awt/image/AffineTransformOp.java: New Class.

2004-03-01  Olga Rodimina  <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(setPaint): Interpret correctly TexturePaint's
	anchor rectangle.
	(drawImage): Fixed scale factors of the affine
	transform.

2004-02-27  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics.java
	(GdkGraphics(Component)): Inherit font from component.
	(drawString): Use font style.
	* gnu/java/awt/peer/gtk/GtkCheckboxPeer.java
	(gtkSetFont): New native method declaration.
	(setFont): New method.
	* gnu/java/awt/peer/gtk/GtkComponentPeer.java
	(gtkSetFont): New native method declaration.
	(setFont): Call new native method gtkSetFont.
	* gnu/java/awt/peer/gtk/GtkContainerPeer.java
	(setFont): For all child components who do not their fonts set,
        set their peers' fonts with this container's font.
	* gnu/java/awt/peer/gtk/GtkLabelPeer.java:
	Move all native method declarations to the top for readability.
	(gtkSetFont): New native method declaration.
	(setFont): New method.
	* java/awt/Component.java
	(setFont): Invalidate after setting the font.
	* java/awt/Container.java
	(invalidateTree): New method.
	(setFont): Invalidate the container tree after setting the font.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGraphics.c
	(Java_gnu_java_awt_peer_gtk_GdkGraphics_drawString): Use font style.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkCheckboxPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkCheckboxPeer_gtkSetFont): New method.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkComponentPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkComponentPeer_gtkSetFont): New method.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkLabelPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkLabelPeer_gtkSetFont): New method.

2004-02-27  Olga Rodimina <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(updateBufferedImage): New helper function.
	Updates BufferedImage in memory if it was changed.
	(draw): changed to update BufferedImage in memory after
	this drawing operation
	(fill): Ditto.
	(draw3DRect): Ditto.
	(fill3DRect): Ditto.
	(clearRect): Ditto.
	(drawRaster): Ditto.
	(drawImage) : Ditto. Update only in case of GtkOffScreenImage with
	no affine transformation.
	(drawGlyphVector): Ditto.

2004-02-26  Olga Rodimina <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(isBufferedImageGraphics): New Helper function.
	Returns true if this graphics2d can be used to draw
	into buffered image and false otherwise.
	(updateImagePixels): New Helper function.
	Updates pixels in the BufferedImage.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGraphics2D.c
	(getImagePixels): New function. Returns pixels
	of the buffered image associated with
	this Graphics2D.

2004-02-26  David Jee  <djee@redhat.com>

	* java/awt/BorderLayout.java
	(layoutContainer): Fix width and height calculations to ensure
	that they're non-negative.
	* java/awt/Component.java
	(setBackground): If c is null, inherit from closest ancestor whose
	background color is set.

2004-02-26�� Kim Ho�� <kho@redhat.com>

	* Makefile.am: Add new files.
	* Makefile.in: Re-generate.
	* javax/swing/JProgressBar.java:
	(JProgressBar(int, int int)): Throw
	IllegalArgumentException if orientation is
	invalid.
	(JProgressBar(BoundedRangeModel)): Create
	ChangeListener and register it. UpdateUI.
	(getChangeListeners): Implement.
	(setModel): Reset ChangeListener.
	* javax/swing/JScrollBar.java: Implement.
	* javax/swing/JSeparator.java: Implement.
	* javax/swing/JSlider.java:
	(JSlider(int, int, int, int)): Throw
	IllegalArgumentException if orientation
	is invalid.
	(getChangeListeners): Fix method name.
	* javax/swing/SwingUtilities.java:
	(layoutCompoundLabel): If there is no text,
	set the text rectangle dimensions to 0.
	* javax/swing/plaf/basic/BasicButtonUI.java:
	(paint): If there is no text, don't paint it.
	* javax/swing/plaf/basic/BasicScrollBarUI.java:
	Implement.
	* javax/swing/plaf/basic/BasicSeparatorUI.java:
	Implement.
	* javax/swing/plaf/basic/BasicSliderUI.java:
	(propertyChange): If the model changes, change
	the listeners accordingly.

2004-02-25  Graydon Hoare  <graydon@redhat.com>

	* javax/swing/AbstractButton.java: Add "final" qualifiers.
	* javax/swing/JList.java: Reimplement.
	* javax/swing/DefaultListSelectionModel.java: Reimplement.
	* javax/swing/plaf/basic/BasicListUI.java: Reimplement.
	* javax/swing/plaf/basic/BasicLookAndFeel.java: Add "purple" values.
	* javax/swing/ListModel.java: Javadoc.
	* javax/swing/ListSelectionModel.java: Add missing methods.
	* javax/swing/AbstractListModel.java: Javadoc and corrections.
	* javax/swing/DefaultListModel.java: Javadoc and corrections.
	* javax/swing/ListModel.java: Javadoc and corrections.
	* javax/swing/DefaultListCellRenderer.java: Minor tidying.

2004-02-25  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GtkFontPeer.java
	(GtkFontPeer): Change default size to 12.
	* gnu/java/awt/peer/gtk/GtkToolkit.java
	(getFontPeer): Change default size to 12.
	(getClasspathFontPeer): Likewise. Set default name to "Default".
	* java/awt/Font.java
	(Font(Map)): Call Font(String,Map).
	(Font(String,Map)): If attrs is null, initialize it as an empty
	HashMap, which will ensure that the Font will get default attributes.

2004-02-25  David Jee  <djee@redhat.com>

	* gnu/java/awt/peer/gtk/GtkFontPeer.java
	(GtkFontPeer(String,int)): Call the new constructor with size 1.
	(GtkFontPeer(String,int,int)): New constructor with size attribute.
	* gnu/java/awt/peer/gtk/GtkToolkit.java
	(getFontPeer(String,int)): Call the new overload method with size 1.
	(getFontPeer(String,int,int)): New method. Overloaded with size
	attribute.
	(getClasspathFontPeer): Set the size of the font.

2004-02-24  Olga Rodimina  <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(bimage): New field.
	(GdkGraphics2D): New Constructor. Constructs Graphics
	object that can be used to draw into the Buffered Image.
	* gnu/java/awt/peer/gtk/GdkGraphicsEnvironment.java:
	(GdkGraphicsEnvironment): Fixed to include public
	keyword.
	(createGraphics): Implemented.
	* gnu/java/awt/peer/gtk/GtkToolkit.java
	(getLocalGraphicsEnvironment): Implemented.
	* java/awt/GraphicsEnvironment.java:
	(getLocalGraphicsEnvironment): Implemented.
	* java/awt/image/BufferedImage.java:
	(createGraphics): Implemented.

2004-02-24  David Jee  <djee@redhat.com>

	* java/awt/Component.java
	(eventTypeEnabled): Add MOUSE_MOVED and MOUSE_DRAGGED event types.
	* java/awt/Container.java
	(addNotifyContainerChildren): Fix event enabling.

2004-02-23  Olga Rodimina  <rodimina@redhat.com>

	* Makefile.am: Added
	gnu/java/awt/peer/gtk/GdkGraphicsEnvironment.java
	* Makefile.in: Re-generated.
	* gnu/java/awt/peer/gtk/GdkGraphicsEnvironment.java:
	New Class.

2004-02-19  Kim Ho  <kho@redhat.com>

	* Makefile.am: Add BasicProgressBarUI
	* Makefile.in: Regenerate.
	* javax/swing/JProgressBar.java:
	Re-implement.
	* javax/swing/plaf/basic/BasicLookAndFeel.java
	Add constants for JProgressBar.
	* javax/swing/plaf/basic/BasicProgressBarUI.java
	Implement.
	* javax/swing/plaf/basic/BasicSliderUI.java
	Change comments.
	(calculateGeometry): New method
	(paint): Remove unnecessary size calculations.

2004-02-18  Olga Rodimina  <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java
	(drawRaster): Fixed small error that caused
	imageToUser transformation to be set incorrectly.
	(toString): Implemented.

2004-02-18  David Jee  <djee@redhat.com>

	* java/awt/CardLayout.java
	(addLayoutComponent): Show the first component added as the default.
	(removeLayoutComponent): After removing, show the next component.
	(gotoComponent): If there is only one component, show it and return.

2004-02-18  Kim Ho  <kho@redhat.com>

	* javax/swing/JSlider.java: Re-order
	modifiers.
	* javax/swing/JLabel.java: Re-order
	modifiers.
	* javax/swing/JComponent.java:
	(addPropertyChangeListener):
	Implement.
	(removePropertyChangeListener):
	ditto.
	(firePropertyChangeEvent):
	ditto.

2004-02-17  David Jee  <djee@redhat.com>

	* java/awt/Component.java
	(show): Dispatch ComponentEvent via system event queue.
	(hide): Likewise.
	(move): Likewise.
	(resize): Likewise.
	(reshape): Likewise.
	* java/awt/Window.java
	(setBoundsCallback): Likewise.

2004-02-17  David Jee  <djee@redhat.com>

	* jni/gtk-peer/gnu_java_awt_peer_gtk_GtkComponentPeer.c
	(Java_gnu_java_awt_peer_gtk_GtkComponentPeer_setNativeBounds):
	Use gtk_widget_set_size_request() instead of the deprecated
	gtk_widget_set_usize().

2004-02-17  Kim Ho  <kho@redhat.com>

	* javax/swing/JSlider.java: Fix comments and
	make property strings constants.
	(createStandardLabels): Use the labels
	preferred size as bounds.
	* javax/swing/plaf/basic/BasicSliderUI.java
	Fix comments.
	(ScrollHandler::actionPerformed): Don't
	calculate the timer stop value. Let the
	MouseListeners find the stop location.
	(getPreferredHorizontalSize): Re-implement.
	(getPreferredVerticalSize): ditto.
	(getMinimumHorizontalSize): ditto.
	(getMinimumVerticalSize): ditto.
	(getPreferredSize): ditto.
	(getMinimumSize): ditto.
	(getMaximumSize): ditto.
	(paintTicks): Use doubles to find the
	tick location.
	(paintHorizontalLabel):�� Use preferredSize
	as initial width and height.
	(paintVerticalLabel): ditto.

2004-02-17  Kim Ho  <kho@redhat.com>

	* javax/swing/JLabel.java: Changed
	property strings to constants.
	(DISPLAYED_MNEMONIC_INDEX_CHANGED_PROPERTY):
	New property.
	(setText): Change mnemonic index if
	text is too short.
	(setDisplayedMnemonicIndex): Fire property
	change event.
	(getDisplayedMnemonicIndex): Remove check
	against short text.

2004-02-17 Olga Rodimina <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java:
	(drawImage(img,xform,obs)): Invert xform before
	passing the xform to cairo.
	(drawImage(img,x,y,bgcolor,obs)): Implemented.
	(drawImage (img,x,y,w,h,bgcolor,obs)): Partly
	implemented.
	(drawImage (img,x,y,w,h,obs)): Implemented.
	(drawImage (img,dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2,
	bgcolor,obs)): Partly implemented.
	(drawImage (img,dx1,dy1,dx2,dy2,sx1,sy1,sx2,sy2,obs)):
	Implemented.
	* java/awt/image/BufferedImage.java:
	(copyData): if dest is null, create raster with same
	dimensions as the current image.

2004-02-16  Graydon Hoare  <graydon@redhat.com>

	* javax/swing/plaf/basic/BasicLabelUI.java
	(getPreferredSize): Use layoutCL.
	* javax/swing/plaf/basic/BasicGraphicsUtils.java
	(getPreferredButtonSize): Start with empty view rect, layout using
	component's preferred alignment.
	* javax/swing/plaf/basic/BasicLookAndFeel.java: Add some Label and
	List defaults.

2004-02-16  David Jee  <djee@redhat.com>

	* java/awt/Component.java
	(show): Dispatch COMPONENT_SHOWN ComponentEvent.
	(hide): Dispatch COMPONENT_HIDDEN ComponentEvent.
	(move): Erase old bounds and repaint new bounds. Dispatch
	COMPONENT_MOVED ComponentEvent.
	(resize): Erase old bounds and repaint new bounds. Dispatch
	COMPONENT_RESIZED ComponentEvent.
	(reshape): Dispatch COMPONENT_RESIZED and COMPONENT_MOVED
	ComponentEvents.
	* java/awt/Window.java
	(setBoundsCallback): Dispatch COMPONENT_RESIZED and COMPONENT_MOVED
	ComponentEvents.

2004-02-16  Olga Rodimina  <rodimina@redhat.com>

	* gnu/java/awt/peer/gtk/GdkGraphics2D.java:
	(setRenderingHint): Added implementation of
	Interpolation rendering hints.
	(setRenderingHints): Ditto.
	* jni/gtk-peer/gnu_java_awt_peer_gtk_GdkGraphics2D.c:
	(drawPixels): fixed to allow user to choose type
	of filtering that should be used when displaying images.
	(cairoSurfaceSetFilter): New method. Sets filter type for
	interpolation of pixel values.

2004-02-16  David Jee  <djee@redhat.com>

	* java/awt/GridBagLayout.java
	(calcCellSizes): Rows or columns with zero sizes should still be
	considered for extra space distribution.

2004-02-16  Kim Ho  <kho@redhat.com>

	* javax/swing/JLabel.java: Re-implement.
	* javax/swing/plaf/basic/BasicLabelUI.java
	Re-implement.
	* javax/swing/plaf/basic/BasicLookAndFeel.java:
	Added constant.

2004-02-16�� Kim Ho�� <kho@redhat.com>

	* javax/swing/JSlider.java: Fix indentation and comments.
	(setModel): Remove null check to conform with Sun's.
	(setOrientation): Throw exception if not
	HORIZONTAL or VERTICAL.
	(getInverted): Use private variable instead of
	ComponentOrientation.
	(setInverted): ditto.
	* javax/swing/plaf/basic/BasicSliderUI.java:
	Fix indentation and comments.
	(propertyChange): Remove check for inverted slider, handle
	in main paint.
	(getMinimumSize): Return preferred size.
	(getMaximumSize): ditto.
	(calculateFocusRect): Don't relocate rectangle.
	(drawInverted): Return XOR of the slider's inversion and
	the component's orientation.
	(paint): Update leftToRightCache

2004-02-13  David Jee  <djee@redhat.com>

	* java/awt/GridBagLayout.java
	(GetLayoutInfo): Fix weight and size distribution. Relocate repeated
	code to helper methods.
	(sortBySpan): New helper method.
	(distributeSizeAndWeight): Likewise.
	(calcCellWeights): Likewise.
	(calcCellSizes): Add comments.

2004-02-13  David Jee  <djee@redhat.com>

	* java/awt/Component.java
        (show): Only do something if component is invisible at the moment.
        (hide): Only do something if component is visible at the moment.
        (reshape): If lightweight, erase old bounds and repaint new bounds.

2004-02-13�� Kim Ho�� <kho@redhat.com>

	* Makefile.am: Updated for new file.
	* Makefile.in: Regenerated.
	* javax/swing/JSlider.java: Reimplement.
	* javax/swing/SwingUtilities.java
	(layoutCompoundLabel): Use icon height
	instead of width.
	(paintComponent): Implement.
	* javax/swing/plaf/basic/BasicLookAndFeel.java:
	Add JSlider defaults.
	* javax/swing/plaf/basic/BasicSliderUI.java:
	Implement. New file.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@79607 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 225 insertions, 88 deletions

diff --git a/libjava/javax/swing/JViewport.java b/libjava/javax/swing/JViewport.java
index 18365bcf9ec..9174a833b70 100644
--- a/libjava/javax/swing/JViewport.java
+++ b/libjava/javax/swing/JViewport.java
@@ -40,103 +40,240 @@ package javax.swing;
 
 import java.awt.Component;
 import java.awt.Container;
+import java.awt.Dimension;
 import java.awt.Graphics;
 import java.awt.Image;
+import java.awt.Insets;
 import java.awt.Point;
 import java.awt.Rectangle;
+import java.awt.image.ImageObserver;
 import javax.accessibility.Accessible;
+import javax.swing.event.ChangeEvent;
+import javax.swing.event.ChangeListener;
 import javax.swing.plaf.ViewportUI;
 
+
+/**
+ *  
+ * <pre>
+ *                                                     _
+ *   +-------------------------------+    ...........Y1 \
+ *   |  view                         |                .  \
+ *   |  (this component's child)     |                .   > VY
+ *   |                               |                .  / = Y2-Y1
+ *   |         +------------------------------+  ....Y2_/
+ *   |         | viewport            |        |       .
+ *   |         | (this component)    |        |       .
+ *   |         |                     |        |       .
+ *   |         |                     |        |       .
+ *   |         |                     |        |       .
+ *   |         |                     |        |       .
+ *   |         +------------------------------+  ....Y3
+ *   |                               |                .
+ *   |         .                     |        .       .
+ *   |         .                     |        .       .
+ *   +---------.---------------------+    ...........Y4
+ *   .         .                     .        .
+ *   .         .                     .        .
+ *   .         .                     .        .
+ *   X1.......X2.....................X3.......X4
+ *   \____  ___/
+ *        \/
+ *        VX = X2-X1
+ *</pre>
+ *  
+ * <p>A viewport is, like all swing components, located at some position in
+ * the swing component tree; that location is exactly the same as any other
+ * components: the viewport's "bounds".</p>
+ *
+ * <p>But in terms of drawing its child, the viewport thinks of itself as
+ * covering a particular position <em>of the view's coordinate space</em>.
+ * For example, the {@link javax.JViewPort.getViewPosition} method returns
+ * the position <code>(VX,VY)</code> shown above, which is an position in
+ * "view space", even though this is <em>implemented</em> by positioning
+ * the underlying child at position <code>(-VX,-VY)</code></p>
+ *
+ */
+
 public class JViewport extends JComponent
 {
-    Component c;
-
-    JViewport()
-    {
-	setOpaque(true);
-	updateUI();
-    }
-
-    void setView(Component c)
-    {
-	if (this.c != null)
-	    remove(c);
-
-	this.c = c;
-
-	add(c);
-    }
-
-    public String getUIClassID()
-    {
-	return "ViewportUI";
-    }
-
-    public void updateUI()
-    {
-	ViewportUI vp = (ViewportUI) UIManager.getUI(this);
-	setUI(vp);
-    }
-
-    Container GetHeavy(Container parent)
-    {
-	if (parent == null)
-	    return null;
-
-	while (isLightweightComponent(parent))
-	    {
-		Container p = parent.getParent();
-
-		if (p == null)
-		    {
-			System.out.println("GetHeavy FAILED, no heavy weight component found");
-			return parent;
-		    }
-		
-		parent = p;
-	    }
-	return parent;
-    }
+  public static int BACKINGSTORE_SCROLL_MODE = 1;
+  public static int BLIT_SCROLL_MODE = 2;
+  public static int SIMPLE_SCROLL_MODE = 3;
+
+  ChangeEvent changeEvent = new ChangeEvent(this);
+
+  int scrollMode;
+
+  boolean scrollUnderway;
+  boolean isViewSizeSet;
+
+  /** 
+   * The width and height of the Viewport's area in terms of view
+   * coordinates.  Typically this will be the same as the width and height
+   * of the viewport's bounds, unless the viewport transforms units of
+   * width and height, which it may do, for example if it magnifies or
+   * rotates its view.
+   *
+   * @see #toViewCoordinates
+   */
+  Dimension viewExtent;
+
+  Point lastPaintPosition;
+
+  JViewport()
+  {
+    setOpaque(true);
+    updateUI();
+  }
+
+  public Dimension getViewSize()
+  {
+    if (viewExtent == null)
+      return getPreferredSize();
+    else
+      return viewExtent;
+  }
+
+  public void setViewSize(Dimension newSize)
+  {
+    viewExtent = newSize;
+    fireStateChanged();
+  }
+
+  public Point getViewPosition()
+  {
+    Component view = getView();
+    if (view == null)
+      return new Point(0,0);
+    else
+      {
+        Point p = view.getLocation();
+        p.x = -p.x;
+        p.y = -p.y;
+        return p;
+      }
+  }
+
+  public void setViewPosition(Point p)
+  {
+    Component view = getView();
+    if (view != null)
+      {
+        Point q = new Point(-p.x, -p.y);
+        view.setLocation(q);
+        fireStateChanged();
+      }
+  }
+
+  public Rectangle getViewRect()
+  {
+    return new Rectangle(getViewPosition(), 
+                         getViewSize());
+  }
+
+  public boolean isBackingStoreEnabled()
+  {
+    return scrollMode == BACKINGSTORE_SCROLL_MODE;
+  }
+
+  public void setBackingStoreEnabled(boolean b)
+  {
+    if (b && scrollMode != BACKINGSTORE_SCROLL_MODE)
+      {
+        scrollMode = BACKINGSTORE_SCROLL_MODE;
+        fireStateChanged();
+      }
+  }
+
+  public void setScrollMode(int mode)
+  {
+    scrollMode = mode;
+    fireStateChanged();
+  }
+
+  public int getScrollMode()
+  {
+    return scrollMode;
+  }
+
+  public Component getView()
+  {
+    if (ncomponents > 0)
+      return component[0];
+    else
+      return null;
+  }
+
+  public void setView(Component v)
+  {
+    add(v);
+    fireStateChanged();
+  }
     
     
-    public void paint(Graphics g)
-    {
-	paintChildren(g);
-
-	System.out.println("XXXXXXXXXXXXXXXXXXXXXXXXXXXX   JViewport -----> paint()");
-
-	Container parent = GetHeavy(getParent());
-	
-	System.out.println("parent = " + parent + ", " + getParent());
-
-	//parent.paint();
-
-	Graphics wg = parent.getGraphics();
-	
-	int x = 0;
-	int y = 0;
-	int w = getWidth();
-	int h = getHeight();
-
-	Rectangle r = new Rectangle(x, y, w, h);
-
-	int ox = 0;
-	int oy = 0;
-
-	wg.copyArea(r.x,
-		    r.y,
-		    r.width,
-		    r.height,
-		    ox,
-		    oy);
-
-	wg.dispose();
-    }
+  public void addImpl(Component comp, Object constraints, int index)
+  {
+    if (ncomponents > 0)
+      remove(component[0]);
+    super.addImpl(comp, constraints, index);
+  }
+
+  public final Insets getInsets() 
+  {
+    return new Insets(0,0,0,0);
+  }
+
+  public final Insets getInsets(Insets insets)
+  {
+    if (insets == null)
+      return getInsets();
+    insets.top = 0;
+    insets.bottom = 0;
+    insets.left = 0;
+    insets.right = 0;
+    return insets;
+  }
+    
+  public boolean isOptimizedDrawingEnabled()
+  {
+    return false;
+  }
+
+  public ChangeListener[] getChangeListeners() 
+  {
+    return (ChangeListener[]) getListeners(ChangeListener.class);
+  }
+
+  public void paint(Graphics g)
+  {
+    paintComponent(g);
+  }
+
+  void fireStateChanged()
+  {
+    ChangeListener[] listeners = getChangeListeners();
+    for (int i = 0; i < listeners.length; ++i)
+      listeners[i].stateChanged(changeEvent);
+  }
+
+  public void addChangeListener(ChangeListener listener)
+  {
+    listenerList.add(ChangeListener.class, listener);
+  }
+
+  public void removeChangeListener(ChangeListener listener)
+  {
+    listenerList.remove(ChangeListener.class, listener);
+  }
+
+  public String getUIClassID()
+  {
+    return "ViewportUI";
+  }
+
+  public void updateUI()
+  {
+    setUI((ViewportUI) UIManager.getUI(this));
+  }            
 }
-
-
-
-
-
-
-