diff -r 40dbf1a7526a -r fdd33964b35f ui/motif/button.c
--- a/ui/motif/button.c	Sun Jan 24 18:47:39 2016 +0100
+++ b/ui/motif/button.c	Sun Jan 24 19:23:49 2016 +0100
@@ -105,3 +105,103 @@
     e.intval = event->value;
     event->callback(&e, event->userdata);
 }
+
+
+static void radio_callback(
+        Widget widget,
+        RadioEventData *event,
+        XmToggleButtonCallbackStruct *tb)
+{
+    if(tb->set) {
+        RadioButtonGroup *group = event->group;
+        if(group->current) {
+            Arg arg;
+            XtSetArg(arg, XmNset, FALSE);
+            XtSetValues(group->current, &arg, 1);
+        }
+        group->current = widget;
+    }
+}
+
+UIWIDGET ui_radiobutton(UiObject *obj, char *label, UiInteger *rgroup) {
+    UiContainer *ct = uic_get_current_container(obj);
+    XmString str = XmStringCreateLocalized(label);
+    
+    int n = 0;
+    Arg args[16];
+    
+    XtSetArg(args[n], XmNlabelString, str);
+    n++;
+    XtSetArg(args[n], XmNindicatorType, XmONE_OF_MANY_ROUND);
+    n++;
+    
+    Widget parent = ct->prepare(ct, args, &n, FALSE);
+    Widget button = XmCreateToggleButton(parent, "radiobutton", args, n);
+    ct->add(ct, button);
+    
+    if(rgroup) {
+        RadioButtonGroup *group;
+        if(rgroup->obj) {
+            group = rgroup->obj;
+            group->buttons = ucx_list_append(group->buttons, button);
+            group->ref++;
+        } else {
+            group = malloc(sizeof(RadioButtonGroup));
+            group->buttons = ucx_list_append(NULL, button);
+            group->current = button;
+            // this is the first button in the radiobutton group
+            // so we should enable it
+            Arg arg;
+            XtSetArg(arg, XmNset, TRUE);
+            XtSetValues(button, &arg, 1);
+            rgroup->obj = group;
+            
+            group->current = button;
+        }
+        
+        RadioEventData *event = malloc(sizeof(RadioEventData));
+        event->obj = obj;
+        event->callback = NULL;
+        event->userdata = NULL;
+        event->group = group;
+        XtAddCallback(
+            button,
+            XmNvalueChangedCallback,
+            (XtCallbackProc)radio_callback,
+            event);
+        
+        rgroup->get = ui_radiobutton_get;
+        rgroup->set = ui_radiobutton_set;
+    }
+    
+    XtManageChild(button); 
+    return button;
+}
+
+int ui_radiobutton_get(UiInteger *value) {
+    RadioButtonGroup *group = value->obj;
+    
+    int i = ucx_list_find(group->buttons, group->current, NULL, NULL);
+    if (i >= 0) {
+        value->value = i;
+        return i;
+    } else {
+        return 0;
+    }
+}
+
+void ui_radiobutton_set(UiInteger *value, int i) {
+    RadioButtonGroup *group = value->obj;
+    Arg arg;
+    
+    XtSetArg(arg, XmNset, FALSE);
+    XtSetValues(group->current, &arg, 1);
+    
+    UcxList *elm = ucx_list_get(group->buttons, i);
+    if(elm) {
+        Widget button = elm->data;
+        XtSetArg(arg, XmNset, TRUE);
+        XtSetValues(button, &arg, 1);
+        group->current = button;
+    }
+}