Source for gnu.java.awt.peer.gtk.GtkGenericPeer

   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: }