Initial revision

From-SVN: r102074
2005-07-16 00:30:23 +00:00
parent 6f4434b39b
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+/* 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.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;
+
+public interface ComponentPeer
+{
+  int checkImage(Image img, int width, int height, 
+		 ImageObserver ob);
+  Image createImage(ImageProducer prod);
+  Image createImage(int width, int height);
+  void disable();
+  void dispose();
+  void enable();
+  ColorModel getColorModel();
+  FontMetrics getFontMetrics(Font f);
+  Graphics getGraphics();
+  Point getLocationOnScreen();
+  Dimension getMinimumSize();
+  Dimension getPreferredSize();
+  Toolkit getToolkit();
+  void handleEvent(AWTEvent e);
+  void hide();
+
+  /**
+   * Part of the earlier 1.1 API, replaced by isFocusable().
+   */
+  boolean isFocusTraversable();
+  boolean isFocusable();
+  Dimension minimumSize();
+  Dimension preferredSize();
+  void paint(Graphics graphics);
+  boolean prepareImage(Image img, int width, int height,
+			      ImageObserver ob);
+  void print(Graphics graphics);
+  void repaint(long tm, int x, int y, int width, int height);
+
+  /**
+   * Part of the earlier 1.1 API, apparently replaced by argument 
+   * form of the same method.
+   */
+  void requestFocus();
+  boolean requestFocus (Component source, boolean bool1, boolean bool2, long x);
+
+  void reshape(int x, int y, int width, int height);
+  void setBackground(Color color);
+  void setBounds(int x, int y, int width, int height);
+
+  /**
+   * Part of the earlier 1.1 API, apparently no longer needed.
+   */
+  void setCursor(Cursor cursor);
+
+  void setEnabled(boolean enabled);
+  void setFont(Font font);
+  void setForeground(Color color);
+  void setVisible(boolean visible);
+  void show();
+
+  /** 
+   * Get the graphics configuration of the component. The color model
+   * of the component can be derived from the configuration.
+   */
+  GraphicsConfiguration getGraphicsConfiguration();
+
+  /**
+   * Part of an older API, no longer needed.
+   */
+  void setEventMask (long mask);
+
+  // Methods below are introduced since 1.1
+  boolean isObscured();
+  boolean canDetermineObscurity();
+  void coalescePaintEvent(PaintEvent e);
+  void updateCursorImmediately();
+  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();
+}