diff -r 000000000000 -r 804d8803eade ui/motif/button.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/motif/button.c	Wed Dec 09 11:32:01 2020 +0100
@@ -0,0 +1,207 @@
+/*
+ * 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"
+#include "container.h"
+#include "../common/context.h"
+#include <ucx/mempool.h>
+
+
+UIWIDGET ui_button(UiObject *obj, char *label, ui_callback f, void *data) {
+    UiContainer *ct = uic_get_current_container(obj);
+    XmString str = XmStringCreateLocalized(label);
+    
+    int n = 0;
+    Arg args[16];
+    
+    XtSetArg(args[n], XmNlabelString, str);
+    n++;
+    
+    Widget parent = ct->prepare(ct, args, &n, FALSE);
+    Widget button = XmCreatePushButton(parent, "button", args, n);
+    ct->add(ct, button);
+    
+    if(f) {
+        UiEventData *event = ucx_mempool_malloc(
+                obj->ctx->mempool,
+                sizeof(UiEventData));
+        event->obj = obj;
+        event->userdata = data;
+        event->callback = f;
+        event->value = 0;
+        XtAddCallback(
+                button,
+                XmNactivateCallback,
+                (XtCallbackProc)ui_push_button_callback,
+                event);
+    }
+    
+    XtManageChild(button);
+    
+    return button;
+}
+
+// wrapper
+int64_t 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, int64_t 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->userdata); 
+}
+
+void ui_push_button_callback(Widget widget, UiEventData *event, XtPointer d) {
+    UiEvent e;
+    e.obj = event->obj;
+    e.window = event->obj->window;
+    e.document = event->obj->ctx->document;
+    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;
+}
+
+int64_t 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, int64_t 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;
+    }
+}