diff -r 000000000000 -r 804d8803eade ui/motif/list.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/motif/list.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 "container.h"
+
+#include "list.h"
+#include "../common/object.h"
+
+
+void* ui_strmodel_getvalue(void *elm, int column) {
+    return column == 0 ? elm : NULL;
+}
+
+
+UIWIDGET ui_listview_str(UiObject *obj, UiList *list, ui_callback f, void *udata) {
+    return ui_listview(obj, list, ui_strmodel_getvalue, f, udata);
+}
+
+UIWIDGET ui_listview_var(UiObject *obj, UiVar *var, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    int count;
+    XmStringTable items = ui_create_stringlist(var->value, getvalue, &count);
+    
+    Arg args[8];
+    int n = 0;
+    XtSetArg(args[n], XmNitemCount, count);
+    n++;
+    XtSetArg(args[n], XmNitems, count == 0 ? NULL : items);
+    n++;
+    
+    UiContainer *ct = uic_get_current_container(obj);
+    Widget parent = ct->prepare(ct, args, &n, TRUE);
+    Widget widget = XmCreateScrolledList(parent, "listview", args, n);
+    ct->add(ct, XtParent(widget));
+    XtManageChild(widget);
+    
+    UiListView *listview = ucx_mempool_malloc(obj->ctx->mempool, sizeof(UiListView));
+    listview->widget = widget;
+    listview->list = var;
+    listview->getvalue = getvalue;
+    
+    for (int i=0;i<count;i++) {
+        XmStringFree(items[i]);
+    }
+    XtFree((char *)items);
+    
+    if(f) {
+        UiListViewEventData *event = ucx_mempool_malloc(
+                obj->ctx->mempool,
+                sizeof(UiListViewEventData));
+        event->event.obj = obj;
+        event->event.userdata = udata;
+        event->event.callback = f;
+        event->event.value = 0;
+        event->var = var;
+        XtAddCallback(
+                widget,
+                XmNdefaultActionCallback,
+                (XtCallbackProc)ui_list_selection_callback,
+                event);
+    }
+    
+    return widget;
+}
+
+UIWIDGET ui_listview(UiObject *obj, UiList *list, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    UiVar *var = malloc(sizeof(UiVar));
+    var->value = list;
+    var->type = UI_VAR_SPECIAL;
+    return ui_listview_var(obj, var, getvalue, f, udata);
+}
+
+UIWIDGET ui_listview_nv(UiObject *obj, char *varname, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_LIST);
+    if(var) {
+        UiListVar *value = var->value;
+        return ui_listview_var(obj, var, getvalue, f, udata);
+    } else {
+        // TODO: error
+    }
+    return NULL;
+}
+
+
+XmStringTable ui_create_stringlist(UiList *list, ui_getvaluefunc getvalue, int *count) { 
+    int num = list->count(list);
+    XmStringTable items = (XmStringTable)XtMalloc(num * sizeof(XmString));
+    void *data = list->first(list);
+    for(int i=0;i<num;i++) {
+        items[i] = XmStringCreateLocalized(getvalue(data, 0));
+        data = list->next(list);
+    }
+    
+    *count = num;
+    return items;
+}
+
+
+void ui_listview_update(UiEvent *event, UiListView *view) {
+    int count;
+    XmStringTable items = ui_create_stringlist(
+            view->list->value,
+            view->getvalue,
+            &count);
+    
+    XtVaSetValues(
+            view->widget,
+            XmNitems, count == 0 ? NULL : items,
+            XmNitemCount,
+            count,
+            NULL);
+    
+    for (int i=0;i<count;i++) {
+        XmStringFree(items[i]);
+    }
+    XtFree((char *)items);
+}
+
+void ui_list_selection_callback (Widget widget, UiListViewEventData *event, XtPointer data) {
+    XmListCallbackStruct *cbs = (XmListCallbackStruct *)data;
+    
+    UiEvent e;
+    e.obj = event->event.obj;
+    e.window = event->event.obj->window;
+    e.document = event->event.obj->ctx->document;
+    UiList *list = event->var->value;
+    e.eventdata = list->get(list, cbs->item_position - 1);
+    e.intval = cbs->item_position - 1;
+    event->event.callback(&e, event->event.userdata);
+}
+
+
+/* --------------------------- ComboBox ---------------------------  */
+
+UIWIDGET ui_combobox_str(UiObject *obj, UiList *list, ui_callback f, void *udata) {
+    return ui_combobox(obj, list, ui_strmodel_getvalue, f, udata);
+}
+
+UIWIDGET ui_combobox(UiObject *obj, UiList *list, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    UiVar *var = malloc(sizeof(UiVar));
+    var->value = list;
+    var->type = UI_VAR_SPECIAL;
+    return ui_combobox_var(obj, var, getvalue, f, udata);
+}
+
+UIWIDGET ui_combobox_nv(UiObject *obj, char *varname, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    UiVar *var = uic_create_var(obj->ctx, varname, UI_VAR_LIST);
+    if(var) {
+        UiListVar *value = var->value;
+        return ui_combobox_var(obj, var, getvalue, f, udata);
+    } else {
+        // TODO: error
+    }
+    return NULL;
+}
+
+UIWIDGET ui_combobox_var(UiObject *obj, UiVar *var, ui_getvaluefunc getvalue, ui_callback f, void *udata) {
+    UiListView *listview = ucx_mempool_malloc(
+                obj->ctx->mempool,
+                sizeof(UiListView));
+    
+    UiContainer *ct = uic_get_current_container(obj);
+    Arg args[16];
+    int n = 0;
+    XtSetArg(args[n], XmNindicatorOn, XmINDICATOR_NONE);
+    n++;
+    XtSetArg(args[n], XmNtraversalOn, FALSE);
+    n++;
+    XtSetArg(args[n], XmNwidth, 160);
+    n++;
+    Widget parent = ct->prepare(ct, args, &n, FALSE);
+    Widget combobox = XmCreateDropDownList(parent, "combobox", args, n);
+    XtManageChild(combobox);
+    listview->widget = combobox;
+    listview->list = var;
+    listview->getvalue = getvalue;
+    
+    ui_listview_update(NULL, listview);
+    
+}