--- a/src/scim_canna_imengine_setup.cpp
+++ b/src/scim_canna_imengine_setup.cpp
@@ -152,7 +152,9 @@
 // Internal data declaration.
 static bool __have_changed    = true;
 
+#if !GTK_CHECK_VERSION(2, 12, 0)
 static GtkTooltips * __widget_tooltips = 0;
+#endif
 
 static BoolConfigData __config_bool_common [] =
 {
@@ -284,11 +286,17 @@
                       entry);
     gtk_widget_show (entry->widget);
 
+#if !GTK_CHECK_VERSION(2, 12, 0)
     if (!__widget_tooltips)
         __widget_tooltips = gtk_tooltips_new();
+#endif
     if (entry->tooltip)
+#if GTK_CHECK_VERSION(2, 12, 0)
+        gtk_widget_set_tooltip_text (entry->widget, _(entry->tooltip));
+#else
         gtk_tooltips_set_tip (__widget_tooltips, entry->widget,
                               _(entry->tooltip), NULL);
+#endif
 
     return entry->widget;
 }
@@ -324,11 +332,17 @@
                       (GtkAttachOptions) (GTK_FILL|GTK_EXPAND),
                       (GtkAttachOptions) (GTK_FILL), 4, 4);
 
+#if !GTK_CHECK_VERSION(2, 12, 0)
     if (!__widget_tooltips)
         __widget_tooltips = gtk_tooltips_new();
+#endif
     if (entry->tooltip)
+#if GTK_CHECK_VERSION(2, 12, 0)
+        gtk_widget_set_tooltip_text (GTK_WIDGET (entry->widget), _(entry->tooltip));
+#else
         gtk_tooltips_set_tip (__widget_tooltips, GTK_WIDGET (entry->widget),
                               _(entry->tooltip), NULL);
+#endif
 
     return GTK_WIDGET (entry->widget);
 }
@@ -351,31 +365,53 @@
                       (GtkAttachOptions) (GTK_FILL), 4, 4);
     gtk_widget_show (label);
 
+#if GTK_CHECK_VERSION(2, 4, 0)
+    entry->widget = gtk_combo_box_text_new_with_entry ();
+    gtk_label_set_mnemonic_widget (GTK_LABEL (label),
+                                   gtk_bin_get_child (GTK_BIN (entry->widget)));
+    gtk_editable_set_editable (GTK_EDITABLE (gtk_bin_get_child (GTK_BIN (entry->widget))), FALSE);
+#else
     entry->widget = gtk_combo_new ();
     gtk_label_set_mnemonic_widget (GTK_LABEL (label),
                                    GTK_COMBO (entry->widget)->entry);
     gtk_combo_set_value_in_list (GTK_COMBO (entry->widget), TRUE, FALSE);
     gtk_combo_set_case_sensitive (GTK_COMBO (entry->widget), TRUE);
-    gtk_entry_set_editable (GTK_ENTRY (GTK_COMBO (entry->widget)->entry),
+    gtk_editable_set_editable (GTK_EDITABLE (GTK_COMBO (entry->widget)->entry),
                             FALSE);
+#endif
     gtk_widget_show (GTK_WIDGET (entry->widget));
     gtk_table_attach (GTK_TABLE (table), GTK_WIDGET (entry->widget),
                       1, 2, idx, idx + 1,
                       (GtkAttachOptions) (GTK_FILL|GTK_EXPAND),
                       (GtkAttachOptions) (GTK_FILL), 4, 4);
+#if GTK_CHECK_VERSION(2, 4, 0)
+    g_object_set_data (G_OBJECT (gtk_bin_get_child (GTK_BIN (entry->widget))),
+                       DATA_POINTER_KEY,
+                       (gpointer) candidates_p);
+    g_signal_connect ((gpointer) gtk_bin_get_child (GTK_BIN (entry->widget)), "changed",
+                      G_CALLBACK (on_default_combo_changed),
+                      entry);
+#else
     g_object_set_data (G_OBJECT (GTK_COMBO (entry->widget)->entry),
                        DATA_POINTER_KEY,
                        (gpointer) candidates_p);
-
     g_signal_connect ((gpointer) GTK_COMBO (entry->widget)->entry, "changed",
                       G_CALLBACK (on_default_combo_changed),
                       entry);
+#endif
+
 
+#if !GTK_CHECK_VERSION(2, 12, 0)
     if (!__widget_tooltips)
         __widget_tooltips = gtk_tooltips_new();
+#endif
     if (entry->tooltip)
+#if GTK_CHECK_VERSION(2, 12, 0)
+        gtk_widget_set_tooltip_text (GTK_WIDGET (entry->widget), _(entry->tooltip));
+#else
         gtk_tooltips_set_tip (__widget_tooltips, GTK_WIDGET (entry->widget),
                               _(entry->tooltip), NULL);
+#endif
 
     return GTK_WIDGET (entry->widget);
 }
@@ -403,11 +439,17 @@
 {
     GtkWidget *vbox, *frame, *table, *check, *widget;
 
+#if GTK_CHECK_VERSION(3, 0, 0)
+    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+#else
     vbox = gtk_vbox_new (FALSE, 0);
+#endif
     gtk_widget_show (vbox);
 
+#if !GTK_CHECK_VERSION(2, 12, 0)
     if (!__widget_tooltips)
         __widget_tooltips = gtk_tooltips_new();
+#endif
 
     /* specify initialize file name */
     frame = gtk_frame_new ("");
@@ -455,7 +497,11 @@
 {
     GtkWidget *vbox, *table;
 
+#if GTK_CHECK_VERSION(3, 0, 0)
+    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+#else
     vbox = gtk_vbox_new (FALSE, 0);
+#endif
     gtk_widget_show (vbox);
 
     table = gtk_table_new (2, 2, FALSE);
@@ -480,7 +526,11 @@
     GtkWidget *vbox, *label;
     gchar str[256];
 
+#if GTK_CHECK_VERSION(3, 0, 0)
+    vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 0);
+#else
     vbox = gtk_vbox_new (FALSE, 0);
+#endif
     gtk_widget_show (vbox);
 
     g_snprintf (
@@ -547,8 +597,23 @@
 }
 
 static void
-setup_combo_value (GtkCombo *combo, const String & str)
+setup_combo_value (GtkWidget *combo, const String & str)
 {
+#if GTK_CHECK_VERSION(2, 4, 0)
+    ComboConfigCandidate *data
+        = static_cast<ComboConfigCandidate*>
+        (g_object_get_data (G_OBJECT (gtk_bin_get_child (GTK_BIN (combo))),
+                            DATA_POINTER_KEY));
+
+    gint default_index = -1;
+    for (unsigned int i = 0; data[i].label; i++) {
+        gtk_combo_box_text_append_text (GTK_COMBO_BOX_TEXT (combo), _(data[i].label));
+        if (!strcmp (data[i].data, str.c_str ()))
+            default_index = i;
+    }
+    if (default_index != -1)
+        gtk_combo_box_set_active (GTK_COMBO_BOX (combo), default_index);
+#else
     GList *list = NULL;
     const char *defval = NULL;
 
@@ -563,11 +628,12 @@
             defval = _(data[i].label);
     }
 
-    gtk_combo_set_popdown_strings (combo, list);
+    gtk_combo_set_popdown_strings (GTK_COMBO (combo), list);
     g_list_free (list);
 
     if (defval)
-        gtk_entry_set_text (GTK_ENTRY (combo->entry), defval);
+        gtk_entry_set_text (GTK_ENTRY (GTK_COMBO (combo)->entry), defval);
+#endif
 }
 
 static void
@@ -582,8 +648,13 @@
 
     for (unsigned int i = 0; i < __config_string_common_num; i++) {
         StringConfigData &entry = __config_string_common[i];
+#if GTK_CHECK_VERSION(2, 12, 0)
+        if (entry.widget && GTK_IS_COMBO_BOX (entry.widget))
+            setup_combo_value (entry.widget, entry.value);
+#else
         if (entry.widget && GTK_IS_COMBO (entry.widget))
-            setup_combo_value (GTK_COMBO (entry.widget), entry.value);
+            setup_combo_value (entry.widget, entry.value);
+#endif
         else if (entry.widget && GTK_IS_ENTRY (entry.widget))
             gtk_entry_set_text (GTK_ENTRY (entry.widget),
                                 entry.value.c_str ());