libjava/gnu/gcj/xlib/WindowAttributes.java

   1 /* Copyright (C) 2000  Free Software Foundation
   2
   3    This file is part of libgcj.
   4
   5 This software is copyrighted work licensed under the terms of the
   6 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   7 details.  */
   8
   9 package gnu.gcj.xlib;
  10 import gnu.gcj.RawData;
  11
  12 /**
  13  *
  14  * Collection of attributes that can be applied to or read from an
  15  * X11 window.
  16  *
  17  * <p>TODO: Split this class into two classes. One for the structure
  18  * XSetWindowAttributes and one for the XWindowAttributes.  However
  19  * they should still share this common base class.
  20  *
  21  * @author Rolf W. Rasmussen <rolfwr@ii.uib.no> */
  22 public class WindowAttributes
  23 {
  24   // Must match definitions in X.h:
  25   public final static long MASK_BUTTON_PRESS     = 1L<< 2,
  26                            MASK_BUTTON_RELEASE   = 1L<< 3,
  27                            MASK_EXPOSURE         = 1L<<15,
  28                            MASK_STRUCTURE_NOTIFY = 1L<<17;
  29
  30   public WindowAttributes()
  31   {
  32     init(null);
  33   }
  34
  35   public WindowAttributes(Window from)
  36   {
  37     initFromWindow(from);
  38   }
  39
  40   private native void initFromWindow(Window from);
  41   private native void init(WindowAttributes copyFrom);
  42   protected native void finalize();
  43
  44   public Object clone()
  45   {
  46     try
  47       {
  48         WindowAttributes attributes = (WindowAttributes) super.clone();
  49         // In case of an exception before the stucture is copied.
  50         attributes.in  = null;
  51         attributes.out = null;
  52
  53         // FIXME: do anything else?
  54
  55         attributes.init(this);
  56         return attributes;
  57       }
  58     catch (CloneNotSupportedException ex)
  59       {
  60         // This should never happen.
  61         throw new InternalError ();
  62       }
  63   }
  64
  65   public native void setBackground(long pixel);
  66   public native void setBackground(Pixmap pixmap);
  67   public native void setEventMask(long eventMask);
  68
  69   public void setVisual(Visual visual)
  70   {
  71     this.visual = visual;
  72   }
  73
  74   /**
  75    * Retrieve the visual.
  76    *
  77    * @return the visual that is or should be used by a window.  null
  78    * means CopyFormParent.
  79    */
  80   public native Visual getVisual();
  81
  82   Display display;
  83
  84   /**
  85    * Reference to XWindowAttribute structure containing attributes
  86    * read from a window.
  87    */
  88   RawData in = null;
  89
  90   /**
  91    * Reference to XSetWindowAttribute structure containing attributes
  92    * to be applied to a window.
  93    */
  94   RawData out = null;
  95
  96   long mask;
  97
  98   /** null means CopyFromParent during window creation. */
  99   Visual visual = null;
 100
 101   public native void apply(Window window);
 102
 103   final RawData getXSetWindowAttributesStructure()
 104   {
 105     if (out == null)
 106       initOut();
 107     return out;
 108   }
 109
 110   void initOut()
 111   {
 112     throw new UnsupportedOperationException("not implemented yet");
 113   }
 114 }