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1 files changed, 532 insertions, 0 deletions

diff --git a/libjava/classpath/java/awt/peer/ComponentPeer.java b/libjava/classpath/java/awt/peer/ComponentPeer.java
new file mode 100644
index 000000000..736cdf376
--- /dev/null
+++ b/libjava/classpath/java/awt/peer/ComponentPeer.java
@@ -0,0 +1,532 @@
+/* ComponentPeer.java -- Toplevel component peer
+   Copyright (C) 1999, 2000, 2002 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package java.awt.peer;
+
+import java.awt.AWTEvent;
+import java.awt.AWTException;
+import java.awt.BufferCapabilities;
+import java.awt.Color;
+import java.awt.Component;
+import java.awt.Cursor;
+import java.awt.Dimension;
+import java.awt.Font;
+import java.awt.FontMetrics;
+import java.awt.Graphics;
+import java.awt.GraphicsConfiguration;
+import java.awt.Image;
+import java.awt.Point;
+import java.awt.Rectangle;
+import java.awt.Toolkit;
+import java.awt.event.PaintEvent;
+import java.awt.image.ColorModel;
+import java.awt.image.ImageObserver;
+import java.awt.image.ImageProducer;
+import java.awt.image.VolatileImage;
+
+import sun.awt.CausedFocusEvent;
+
+/**
+ * Defines the methods that a component peer is required to implement.
+ */
+public interface ComponentPeer
+{
+  /**
+   * Returns the construction status of the specified image. This is called
+   * by {@link Component#checkImage(Image, int, int, ImageObserver)}.
+   *
+   * @param img the image
+   * @param width the width of the image
+   * @param height the height of the image
+   * @param ob the image observer to be notified of updates of the status
+   *
+   * @return a bitwise ORed set of ImageObserver flags
+   */
+  int checkImage(Image img, int width, int height,
+                 ImageObserver ob);
+
+  /**
+   * Creates an image by starting the specified image producer. This is called
+   * by {@link Component#createImage(ImageProducer)}.
+   *
+   * @param prod the image producer to be used to create the image
+   *
+   * @return the created image
+   */
+  Image createImage(ImageProducer prod);
+
+  /**
+   * Creates an empty image with the specified <code>width</code> and
+   * <code>height</code>.
+   *
+   * @param width the width of the image to be created
+   * @param height the height of the image to be created
+   *
+   * @return the created image
+   */
+  Image createImage(int width, int height);
+
+  /**
+   * Disables the component. This is called by {@link Component#disable()}.
+   */
+  void disable();
+
+  /**
+   * Disposes the component peer. This should release all resources held by the
+   * peer. This is called when the component is no longer in use.
+   */
+  void dispose();
+
+  /**
+   * Enables the component. This is called by {@link Component#enable()}.
+   */
+  void enable();
+
+  /**
+   * Returns the color model of the component. This is currently not used.
+   *
+   * @return the color model of the component
+   */
+  ColorModel getColorModel();
+
+  /**
+   * Returns the font metrics for the specified font. This is called by
+   * {@link Component#getFontMetrics(Font)}.
+   *
+   * @param f the font for which to query the font metrics
+   *
+   * @return the font metrics for the specified font
+   */
+  FontMetrics getFontMetrics(Font f);
+
+  /**
+   * Returns a {@link Graphics} object suitable for drawing on this component.
+   * This is called by {@link Component#getGraphics()}.
+   *
+   * @return a graphics object suitable for drawing on this component
+   */
+  Graphics getGraphics();
+
+  /**
+   * Returns the location of this component in screen coordinates. This is
+   * called by {@link Component#getLocationOnScreen()}.
+   *
+   * @return the location of this component in screen coordinates
+   */
+  Point getLocationOnScreen();
+
+  /**
+   * Returns the minimum size for the component. This is called by
+   * {@link Component#getMinimumSize()}.
+   *
+   * @return the minimum size for the component
+   *
+   * @specnote Presumably this method got added to replace minimumSize().
+   *           However, testing shows that this is never called in the RI
+   *           (tested with JDK5), but instead minimumSize() is called
+   *           directly. It is advisable to implement this method to delegate
+   *           to minimumSize() and put the real implementation in there.
+   */
+  Dimension getMinimumSize();
+
+  /**
+   * Returns the preferred size for the component. This is called by
+   * {@link Component#getPreferredSize()}.
+   *
+   * @return the preferred size for the component
+   *
+   * @specnote Presumably this method got added to replace preferredSize().
+   *           However, testing shows that this is never called in the RI
+   *           (tested with JDK5), but instead preferredSize() is called
+   *           directly. It is advisable to implement this method to delegate
+   *           to preferredSize() and put the real implementation in there.
+   */
+  Dimension getPreferredSize();
+
+  /**
+   * Returns the toolkit that created this peer.
+   *
+   * @return the toolkit that created this peer
+   */
+  Toolkit getToolkit();
+
+  /**
+   * Handles the given event. This is called from
+   * {@link Component#dispatchEvent(AWTEvent)} to give the peer a chance to
+   * react to events for the component.
+   *
+   * @param e the event
+   */
+  void handleEvent(AWTEvent e);
+
+  /**
+   * Makes the component invisible. This is called from
+   * {@link Component#hide()}.
+   */
+  void hide();
+
+  /**
+   * Returns <code>true</code> if the component can receive keyboard input
+   * focus. This is called from {@link Component#isFocusTraversable()}.
+   *
+   * @specnote Part of the earlier 1.1 API, replaced by isFocusable().
+   */
+  boolean isFocusTraversable();
+
+  /**
+   * Returns <code>true</code> if the component can receive keyboard input
+   * focus. This is called from {@link Component#isFocusable()}.
+   */
+  boolean isFocusable();
+
+  /**
+   * Returns the minimum size for the component. This is called by
+   * {@link Component#minimumSize()}.
+   *
+   * @return the minimum size for the component
+   */
+  Dimension minimumSize();
+
+  /**
+   * Returns the preferred size for the component. This is called by
+   * {@link Component#getPreferredSize()}.
+   *
+   * @return the preferred size for the component
+   */
+  Dimension preferredSize();
+
+  void paint(Graphics graphics);
+
+  /**
+   * Prepares an image for rendering on this component. This is called by
+   * {@link Component#prepareImage(Image, int, int, ImageObserver)}.
+   *
+   * @param img the image to prepare
+   * @param width the desired width of the rendered image
+   * @param height the desired height of the rendered image
+   * @param ob the image observer to be notified of updates in the preparation
+   *        process
+   *
+   * @return <code>true</code> if the image has been fully prepared,
+   *         <code>false</code> otherwise (in which case the image observer
+   *         receives updates)
+   */
+  boolean prepareImage(Image img, int width, int height,
+                              ImageObserver ob);
+
+  void print(Graphics graphics);
+
+  /**
+   * Repaints the specified rectangle of this component. This is called from
+   * {@link Component#repaint(long, int, int, int, int)}.
+   *
+   * @param tm number of milliseconds to wait with repainting
+   * @param x the X coordinate of the upper left corner of the damaged rectangle
+   * @param y the Y coordinate of the upper left corner of the damaged rectangle
+   * @param width the width of the damaged rectangle
+   * @param height the height of the damaged rectangle
+   */
+  void repaint(long tm, int x, int y, int width, int height);
+
+  /**
+   * Requests that this component receives the focus. This is called from
+   * {@link Component#requestFocus()}.
+   *
+   * @specnote Part of the earlier 1.1 API, apparently replaced by argument
+   *           form of the same method.
+   */
+  void requestFocus();
+
+  /**
+   * Requests that this component receives the focus. This is called from
+   * {@link Component#requestFocus()}.
+   *
+   * This method is only called for heavyweight component's peers. Lightweight
+   * components ask their nearest heavyweight component to request focus.
+   * It's up to the heavyweight peer to decide if any of it's lightweight
+   * descendants are allowed to receive keyboard input focus or not. If the
+   * focus request is finally approved, then the peer must post a FOCUS_GAINED
+   * event for the requested component.
+   *
+   * @param request the component for which the focus is requested
+   * @param temporary indicates if the focus change is temporary (true) or
+   *        permanent (false)
+   * @param allowWindowFocus indicates if it's allowed to change window focus
+   * @param time the timestamp
+   */
+  boolean requestFocus(Component request, boolean temporary,
+                       boolean allowWindowFocus, long time);
+
+  /**
+   * Notifies the peer that the bounds of this component have changed. This
+   * is called by {@link Component#reshape(int, int, int, int)}.
+   *
+   * @param x the X coordinate of the upper left corner of the component
+   * @param y the Y coordinate of the upper left corner of the component
+   * @param width the width of the component
+   * @param height the height of the component
+   */
+  void reshape(int x, int y, int width, int height);
+
+  /**
+   * Sets the background color of the component. This is called by
+   * {@link Component#setBackground(Color)}.
+   *
+   * @param color the background color to set
+   */
+  void setBackground(Color color);
+
+  /**
+   * Notifies the peer that the bounds of this component have changed. This
+   * is called by {@link Component#setBounds(int, int, int, int)}.
+   *
+   * @param x the X coordinate of the upper left corner of the component
+   * @param y the Y coordinate of the upper left corner of the component
+   * @param width the width of the component
+   * @param height the height of the component
+   */
+  void setBounds(int x, int y, int width, int height);
+
+  /**
+   * Sets the cursor of the component. This is called by
+   * {@link Component#setCursor(Cursor)}.
+   *
+   * @specnote Part of the earlier 1.1 API, apparently no longer needed.
+   */
+  void setCursor(Cursor cursor);
+
+  /**
+   * Sets the enabled/disabled state of this component. This is called by
+   * {@link Component#setEnabled(boolean)}.
+   *
+   * @param enabled <code>true</code> to enable the component,
+   *        <code>false</code> to disable it
+   */
+  void setEnabled(boolean enabled);
+
+  /**
+   * Sets the font of the component. This is called by
+   * {@link Component#setFont(Font)}.
+   *
+   * @param font the font to set
+   */
+  void setFont(Font font);
+
+  /**
+   * Sets the foreground color of the component. This is called by
+   * {@link Component#setForeground(Color)}.
+   *
+   * @param color the foreground color to set
+   */
+  void setForeground(Color color);
+
+  /**
+   * Sets the visibility state of the component. This is called by
+   * {@link Component#setVisible(boolean)}.
+   *
+   * @param visible <code>true</code> to make the component visible,
+   *        <code>false</code> to make it invisible
+   */
+  void setVisible(boolean visible);
+
+  /**
+   * Makes the component visible. This is called by {@link Component#show()}.
+   */
+  void show();
+
+  /**
+   * Get the graphics configuration of the component. The color model
+   * of the component can be derived from the configuration.
+   *
+   * @return the graphics configuration of the component
+   */
+  GraphicsConfiguration getGraphicsConfiguration();
+
+  /**
+   * Part of an older API, no longer needed.
+   */
+  void setEventMask(long mask);
+
+  /**
+   * Returns <code>true</code> if this component has been obscured,
+   * <code>false</code> otherwise. This will only work if
+   * {@link #canDetermineObscurity()} also returns <code>true</code>.
+   *
+   * @return <code>true</code> if this component has been obscured,
+   *         <code>false</code> otherwise.
+   */
+  boolean isObscured();
+
+  /**
+   * Returns <code>true</code> if this component peer can determine if the
+   * component has been obscured, <code>false</code> otherwise.
+   *
+   * @return <code>true</code> if this component peer can determine if the
+   *         component has been obscured, <code>false</code> otherwise
+   */
+  boolean canDetermineObscurity();
+
+  /**
+   * Coalesces the specified paint event.
+   *
+   * @param e the paint event
+   */
+  void coalescePaintEvent(PaintEvent e);
+
+  /**
+   * Updates the cursor.
+   */
+  void updateCursorImmediately();
+
+  /**
+   * Returns true, if this component can handle wheel scrolling,
+   * <code>false</code> otherwise.
+   *
+   * @return true, if this component can handle wheel scrolling,
+   *         <code>false</code> otherwise
+   */
+  boolean handlesWheelScrolling();
+
+  /**
+   * A convenience method that creates a volatile image.  The volatile
+   * image is created on the screen device on which this component is
+   * displayed, in the device's current graphics configuration.
+   *
+   * @param width width of the image
+   * @param height height of the image
+   *
+   * @see VolatileImage
+   *
+   * @since 1.2
+   */
+  VolatileImage createVolatileImage(int width, int height);
+
+  /**
+   * Create a number of image buffers that implement a buffering
+   * strategy according to the given capabilities.
+   *
+   * @param numBuffers the number of buffers
+   * @param caps the buffering capabilities
+   *
+   * @throws AWTException if the specified buffering strategy is not
+   * implemented
+   *
+   * @since 1.2
+   */
+  void createBuffers(int numBuffers, BufferCapabilities caps)
+    throws AWTException;
+
+  /**
+   * Return the back buffer of this component.
+   *
+   * @return the back buffer of this component.
+   *
+   * @since 1.2
+   */
+  Image getBackBuffer();
+
+  /**
+   * Perform a page flip, leaving the contents of the back buffer in
+   * the specified state.
+   *
+   * @param contents the state in which to leave the back buffer
+   *
+   * @since 1.2
+   */
+  void flip(BufferCapabilities.FlipContents contents);
+
+  /**
+   * Destroy the resources created by createBuffers.
+   *
+   * @since 1.2
+   */
+  void destroyBuffers();
+
+  /**
+   * Get the bounds of this component peer.
+   *
+   * @return component peer bounds
+   * @since 1.5
+   */
+  Rectangle getBounds();
+
+  /**
+   * Reparent this component under another container.
+   *
+   * @param parent
+   * @since 1.5
+   */
+  void reparent(ContainerPeer parent);
+
+  /**
+   * Set the bounds of this component peer.
+   *
+   * @param x the new x co-ordinate
+   * @param y the new y co-ordinate
+   * @param width the new width
+   * @param height the new height
+   * @param z the new stacking level
+   * @since 1.5
+   */
+  void setBounds (int x, int y, int width, int height, int z);
+
+  /**
+   * Check if this component supports being reparented.
+   *
+   * @return true if this component can be reparented,
+   * false otherwise.
+   * @since 1.5
+   */
+  boolean isReparentSupported();
+
+  /**
+   * Layout this component peer.
+   *
+   * @since 1.5
+   */
+  void layout();
+
+
+  /**
+   * Requests the focus on the component.
+   */
+  boolean requestFocus(Component lightweightChild, boolean temporary,
+                       boolean focusedWindowChangeAllowed, long time,
+                       CausedFocusEvent.Cause cause);
+
+}