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/* Copyright (C) 2000  Free Software Foundation

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the

Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for

details.  */

package gnu.gcj.xlib;

import gnu.gcj.RawData;

/**

 *

 * Collection of attributes that can be applied to or read from an

 * X11 window.

 *

 * <p>TODO: Split this class into two classes. One for the structure

 * XSetWindowAttributes and one for the XWindowAttributes.  However

 * they should still share this common base class.

 *

 * @author Rolf W. Rasmussen <rolfwr@ii.uib.no> */

public class WindowAttributes

{

  // Must match definitions in X.h:

  public final static long MASK_BUTTON_PRESS     = 1L<< 2,

                           MASK_BUTTON_RELEASE   = 1L<< 3,

                           MASK_EXPOSURE         = 1L<<15,

                           MASK_STRUCTURE_NOTIFY = 1L<<17;

  public WindowAttributes()

  {

    init(null);

  }

  public WindowAttributes(Window from)

  {

    initFromWindow(from);

  }

  private native void initFromWindow(Window from);

  private native void init(WindowAttributes copyFrom);

  protected native void finalize();

  public Object clone()

  {

    try

      {

        WindowAttributes attributes = (WindowAttributes) super.clone();

        // In case of an exception before the stucture is copied.

        attributes.in  = null;

        attributes.out = null;

        // FIXME: do anything else?

        attributes.init(this);

        return attributes;

      }

    catch (CloneNotSupportedException ex)

      {

        // This should never happen.

        throw new InternalError ();

      }

  }

  public native void setBackground(long pixel);

  public native void setBackground(Pixmap pixmap);

  public native void setEventMask(long eventMask);

  public void setVisual(Visual visual)

  {

    this.visual = visual;

  }

  /**

   * Retrieve the visual.

   *

   * @return the visual that is or should be used by a window.  null

   * means CopyFormParent.

   */

  public native Visual getVisual();

  Display display;

  /**

   * Reference to XWindowAttribute structure containing attributes

   * read from a window.

   */

  RawData in = null;

  /**

   * Reference to XSetWindowAttribute structure containing attributes

   * to be applied to a window.

   */

  RawData out = null;

  long mask;

  /** null means CopyFromParent during window creation. */

  Visual visual = null;

  public native void apply(Window window);

  final RawData getXSetWindowAttributesStructure()

  {

    if (out == null)

      initOut();

    return out;

  }

  void initOut()

  {

    throw new UnsupportedOperationException("not implemented yet");

  }

}