diff -r 000000000000 -r 804d8803eade ui/cocoa/container.m
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ui/cocoa/container.m	Wed Dec 09 11:32:01 2020 +0100
@@ -0,0 +1,106 @@
+/*
+ * 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.
+ */
+
+#import <stdio.h>
+#import <stdlib.h>
+
+#import "container.h"
+
+
+UiContainer* ui_window_container(UiObject *obj, NSWindow *window) {
+    UiContainer *ct = ucx_mempool_malloc(
+                                         obj->ctx->mempool,
+                                         sizeof(UiContainer));
+    ct->widget = [window contentView];
+    ct->add = ui_container_add;
+    ct->getframe = ui_container_getframe;
+    return ct;
+}
+
+UIWIDGET ui_sidebar(UiObject *obj) {
+    UiContainer *ct = uic_get_current_container(obj);
+    NSRect frame = ct->getframe(ct);
+    
+    // create and add views
+    NSSplitView *splitview = [[NSSplitView alloc] initWithFrame:frame];
+    [splitview setVertical:YES];
+    [splitview setDividerStyle:NSSplitViewDividerStyleThin];
+    ct->add(ct, splitview);
+    
+    NSRect lframe;
+    lframe.origin.x = 0;
+    lframe.origin.y = 0;
+    lframe.size.width = 200;
+    lframe.size.height = frame.size.height;
+    
+    NSRect rframe;
+    rframe.origin.x = 0;
+    rframe.origin.y = 0;
+    rframe.size.width = frame.size.width - 201;
+    rframe.size.height = frame.size.height;
+    
+    NSView *sidebar = [[NSView alloc]initWithFrame:lframe];
+    NSView *contentarea = [[NSView alloc]initWithFrame:rframe];
+    
+    [splitview addSubview:sidebar];
+    [splitview addSubview:contentarea];
+    
+    // add ui objects for the sidebar and contentarea
+    // the sidebar is added last, so that new views are added first to it
+    UiObject *left = uic_object_new(obj, sidebar);
+    UiContainer *ct1 = ucx_mempool_malloc(
+            obj->ctx->mempool,
+            sizeof(UiContainer));
+    ct1->widget = sidebar;
+    ct1->add = ui_container_add;
+    ct1->getframe = ui_container_getframe;
+    left->container = ct1;
+    
+    UiObject *right = uic_object_new(obj, sidebar);
+    UiContainer *ct2 = ucx_mempool_malloc(
+            obj->ctx->mempool,
+            sizeof(UiContainer));
+    ct2->widget = contentarea;
+    ct2->add = ui_container_add;
+    ct2->getframe = ui_container_getframe;
+    right->container = ct2;
+    
+    uic_obj_add(obj, right);
+    uic_obj_add(obj, left);
+    
+    return splitview;
+}
+
+
+NSRect ui_container_getframe(UiContainer *ct) {
+    return [ct->widget frame];
+}
+
+void ui_container_add(UiContainer *ct, NSView *view) {
+    [ct->widget addSubview: view];
+}