libjava/jni/gtk-peer/gnu_java_awt_peer_gtk_GtkCheckboxPeer.c

   1 /* gtkcheckboxpeer.c -- Native implementation of GtkCheckboxPeer
   2    Copyright (C) 1998, 1999, 2002, 2003 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., 59 Temple Place, Suite 330, Boston, MA
  19 02111-1307 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 #include "gtkpeer.h"
  40 #include "gnu_java_awt_peer_gtk_GtkCheckboxPeer.h"
  41 #include "gnu_java_awt_peer_gtk_GtkComponentPeer.h"
  42
  43 static void item_toggled (GtkToggleButton *item, jobject peer);
  44
  45 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GtkCheckboxGroupPeer_dispose
  46   (JNIEnv *env, jobject obj)
  47 {
  48   /* The actual underlying widget is owned by a different class.  So
  49      we just clean up the hash table here.  */
  50   NSA_DEL_PTR (env, obj);
  51 }
  52
  53 JNIEXPORT void JNICALL Java_gnu_java_awt_peer_gtk_GtkCheckboxGroupPeer_remove
  54   (JNIEnv *env, jobject obj, jobject checkbox)
  55 {
  56   GtkRadioButton *button;
  57   void *ptr;
  58   GSList *list;
  59
  60   ptr = NSA_GET_PTR (env, checkbox);
  61   gdk_threads_enter ();
  62   button = GTK_RADIO_BUTTON (ptr);
  63
  64   /* Update the group to point to some other widget in the group.  We
  65      have to do this because Gtk doesn't have a separate object to
  66      represent a radio button's group.  */
  67   for (list = gtk_radio_button_group (button); list != NULL;
  68        list = list->next)
  69     {
  70       if (list->data != button)
  71         break;
  72     }
  73
  74   gdk_threads_leave ();
  75
  76   NSA_SET_PTR (env, obj, list ? list->data : NULL);
  77 }
  78
  79 JNIEXPORT void JNICALL
  80 Java_gnu_java_awt_peer_gtk_GtkCheckboxPeer_nativeCreate
  81   (JNIEnv *env, jobject obj, jobject group, jboolean state)
  82 {
  83   GtkWidget *button;
  84
  85   /* Create global reference and save it for future use */
  86   NSA_SET_GLOBAL_REF (env, obj);
  87
  88   gdk_threads_enter ();
  89
  90   if (group == NULL)
  91     button = gtk_check_button_new_with_label ("");
  92   else
  93     {
  94       void *native_group = NSA_GET_PTR (env, group);
  95       button = gtk_radio_button_new_with_label_from_widget (native_group, "");
  96       if (native_group == NULL)
  97         {
  98           /* Set the native group so we can use the correct value the
  99              next time around.  FIXME: this doesn't work!  */
 100           NSA_SET_PTR (env, group, button);
 101         }
 102     }
 103   gtk_toggle_button_set_active (GTK_TOGGLE_BUTTON (button), state);
 104
 105   gdk_threads_leave ();
 106
 107   NSA_SET_PTR (env, obj, button);
 108 }
 109
 110 JNIEXPORT void JNICALL
 111 Java_gnu_java_awt_peer_gtk_GtkCheckboxPeer_connectSignals
 112   (JNIEnv *env, jobject obj)
 113 {
 114   void *ptr = NSA_GET_PTR (env, obj);
 115   jobject *gref = NSA_GET_GLOBAL_REF (env, obj);
 116   g_assert (gref);
 117
 118   gdk_threads_enter ();
 119
 120   g_signal_connect (G_OBJECT (ptr), "toggled",
 121                       GTK_SIGNAL_FUNC (item_toggled), *gref);
 122
 123   gdk_threads_leave ();
 124
 125   /* Connect the superclass signals.  */
 126   Java_gnu_java_awt_peer_gtk_GtkComponentPeer_connectSignals (env, obj);
 127 }
 128
 129 JNIEXPORT void JNICALL
 130 Java_gnu_java_awt_peer_gtk_GtkCheckboxPeer_nativeSetCheckboxGroup
 131   (JNIEnv *env, jobject obj, jobject group)
 132 {
 133   GtkRadioButton *button;
 134   void *native_group, *ptr;
 135
 136   ptr = NSA_GET_PTR (env, obj);
 137
 138   gdk_threads_enter ();
 139
 140   /* FIXME: we can't yet switch between a checkbutton and a
 141      radiobutton.  However, AWT requires this.  For now we just
 142      crash.  */
 143
 144   button = GTK_RADIO_BUTTON (ptr);
 145
 146   native_group = NSA_GET_PTR (env, group);
 147   if (native_group == NULL)
 148     gtk_radio_button_set_group (button, NULL);
 149   else
 150     gtk_radio_button_set_group (button,
 151                                 gtk_radio_button_group
 152                                 (GTK_RADIO_BUTTON (native_group)));
 153
 154   gdk_threads_leave ();
 155
 156   /* If the native group wasn't set on the new CheckboxGroup, then set
 157      it now so that the right thing will happen with the next
 158      radiobutton.  The native state for a CheckboxGroup is a pointer
 159      to one of the widgets in the group.  We are careful to keep this
 160      always pointing at a live widget; whenever a widget is destroyed
 161      (or otherwise removed from the group), the CheckboxGroup peer is
 162      notified.  */
 163   if (native_group == NULL)
 164     NSA_SET_PTR (env, group, native_group);
 165 }
 166
 167 static void
 168 item_toggled (GtkToggleButton *item, jobject peer)
 169 {
 170   //g_print ("toggled\n");
 171   (*gdk_env)->CallVoidMethod (gdk_env, peer,
 172                               postItemEventID,
 173                               peer,
 174                               item->active ?
 175                               (jint) AWT_ITEM_SELECTED :
 176                               (jint) AWT_ITEM_DESELECTED);
 177 }