diff -r 000000000000 -r 1f419bd32da1 ui/motif/button.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/motif/button.c	Sat Dec 07 12:14:59 2013 +0100
@@ -0,0 +1,60 @@
+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS HEADER.
+ *
+ * Copyright 2014 Olaf Wintermann. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   1. Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *
+ *   2. Redistributions in binary form must reproduce the above copyright
+ *      notice, this list of conditions and the following disclaimer in the
+ *      documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "button.h"
+
+// wrapper
+int ui_toggle_button_get(UiInteger *i) {
+    int state = 0;
+    XtVaGetValues(i->obj, XmNset, &state, NULL);
+    i->value = state;
+    return state;
+}
+
+void ui_toggle_button_set(UiInteger *i, int value) {
+    Arg arg;
+    XtSetArg(arg, XmNset, value);
+    XtSetValues(i->obj, &arg, 1);
+    i->value = value;
+}
+
+void ui_toggle_button_callback(
+        Widget widget,
+        UiEventData *event,
+        XmToggleButtonCallbackStruct *tb)
+{
+    UiEvent e;
+    e.obj = event->obj;
+    e.window = event->obj->window;
+    // TODO: e.document
+    e.intval = tb->set;
+    event->callback(&e, event->user_data); 
+}