libjava/classpath/gnu/java/awt/peer/gtk/GtkGenericPeer.java

   1 /* GtkGenericPeer.java - Has a hashcode.  Yuck.
   2    Copyright (C) 1998, 1999, 2002, 2006 Free Software Foundation, Inc.
   3
   4 This file is part of GNU Classpath.
   5
   6 GNU Classpath is free software; you can redistribute it and/or modify
   7 it under the terms of the GNU General Public License as published by
   8 the Free Software Foundation; either version 2, or (at your option)
   9 any later version.
  10
  11 GNU Classpath is distributed in the hope that it will be useful, but
  12 WITHOUT ANY WARRANTY; without even the implied warranty of
  13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14 General Public License for more details.
  15
  16 You should have received a copy of the GNU General Public License
  17 along with GNU Classpath; see the file COPYING.  If not, write to the
  18 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19 02110-1301 USA.
  20
  21 Linking this library statically or dynamically with other modules is
  22 making a combined work based on this library.  Thus, the terms and
  23 conditions of the GNU General Public License cover the whole
  24 combination.
  25
  26 As a special exception, the copyright holders of this library give you
  27 permission to link this library with independent modules to produce an
  28 executable, regardless of the license terms of these independent
  29 modules, and to copy and distribute the resulting executable under
  30 terms of your choice, provided that you also meet, for each linked
  31 independent module, the terms and conditions of the license of that
  32 module.  An independent module is a module which is not derived from
  33 or based on this library.  If you modify this library, you may extend
  34 this exception to your version of the library, but you are not
  35 obligated to do so.  If you do not wish to do so, delete this
  36 exception statement from your version. */
  37
  38
  39 package gnu.java.awt.peer.gtk;
  40
  41 import java.awt.EventQueue;
  42 import java.awt.Font;
  43 import java.awt.Toolkit;
  44 import java.awt.event.ActionEvent;
  45
  46 public class GtkGenericPeer
  47 {
  48   // Used by Native State Association (NSA) functions to map
  49   // gtk_widget to peer object.
  50   final int native_state = getUniqueInteger ();
  51
  52   // Next native state value we will assign.
  53   private static int next_native_state = 0;
  54
  55   // The widget or other java-side object we wrap.
  56   protected final Object awtWidget;
  57
  58   /**
  59    * Dispose of our native state.  Calls gtk_widget_destroy on the
  60    * native widget and removes the awtWidget from the native state
  61    * tables. Should be overridden by subclasses if this is not (all)
  62    * that needs to be done.
  63    */
  64   public native void dispose ();
  65
  66   static EventQueue q ()
  67   {
  68     return Toolkit.getDefaultToolkit ().getSystemEventQueue ();
  69   }
  70
  71   protected GtkGenericPeer (Object awtWidget)
  72   {
  73     this.awtWidget = awtWidget;
  74   }
  75
  76   protected void postActionEvent (String command, int mods)
  77   {
  78     q().postEvent (new ActionEvent (awtWidget, ActionEvent.ACTION_PERFORMED,
  79                                   command, mods));
  80   }
  81
  82   // Return a unique integer for use in the native state mapping
  83   // code.  We can't use a hash code since that is not guaranteed to
  84   // be unique.
  85   static synchronized int getUniqueInteger ()
  86   {
  87     // Let's assume this will never wrap.
  88     return next_native_state++;
  89   }
  90
  91   /**
  92    * Helper method to set Font for Gtk Widget.
  93    */
  94   protected void gtkWidgetModifyFont(Font f)
  95   {
  96     gtkWidgetModifyFont(f.getName(), f.getStyle(), f.getSize());
  97   }
  98
  99   /**
 100    * Sets font for this Gtk Widget. Should be overridden by peers which
 101    * are composed of different widgets or are contained in bins.
 102    */
 103   protected native void gtkWidgetModifyFont(String name, int style, int size);
 104
 105   static void printCurrentThread ()
 106   {
 107     System.out.println ("gtkgenericpeer, thread: " + Thread.currentThread ());
 108   }
 109 }