diff -r eb6611be50c7 -r 7cd1b8890302 ui/motif/container.c
--- a/ui/motif/container.c	Thu Jan 01 11:23:43 2015 +0100
+++ b/ui/motif/container.c	Thu Jan 01 14:13:37 2015 +0100
@@ -33,19 +33,108 @@
 #include "../common/context.h"
 #include "../common/object.h"
 
+static UiBool ui_lb2bool(UiLayoutBool b) {
+    return b == UI_LAYOUT_TRUE ? TRUE : FALSE;
+}
+
+static UiLayoutBool ui_bool2lb(UiBool b) {
+    return b ? UI_LAYOUT_TRUE : UI_LAYOUT_FALSE;
+}
+
+
 UiContainer* ui_frame_container(UiObject *obj, Widget frame) {
-    UiContainer *ct = ucx_mempool_malloc(
+    UiContainer *ct = ucx_mempool_calloc(
             obj->ctx->mempool,
+            1,
             sizeof(UiContainer));
     ct->widget = frame;
+    ct->prepare = ui_frame_container_prepare;
     ct->add = ui_frame_container_add;
     return ct;
 }
 
-Widget ui_frame_container_add(UiContainer *ct, Arg *args, int *n) {
+Widget ui_frame_container_prepare(UiContainer *ct, Arg *args, int *n, UiBool fill) {
+    ui_reset_layout(ct->layout);
     return ct->widget;
 }
 
+void ui_frame_container_add(UiContainer *ct, Widget widget) {
+    
+}
+
+
+UiContainer* ui_vbox_container(UiObject *obj, Widget box) {
+    UiContainer *ct = ucx_mempool_calloc(
+            obj->ctx->mempool,
+            1,
+            sizeof(UiBoxContainer));
+    ct->widget = box;
+    ct->prepare = ui_vbox_container_prepare;
+    ct->add = ui_vbox_container_add;
+    return ct;
+}
+
+Widget ui_vbox_container_prepare(UiContainer *ct, Arg *args, int *n, UiBool fill) {
+    UiBoxContainer *bc = (UiBoxContainer*)ct;
+    if(ct->layout.fill != UI_LAYOUT_UNDEFINED) {
+        fill = ui_lb2bool(ct->layout.fill);
+    }
+    
+    if(bc->has_fill && fill) {
+        fprintf(stderr, "UiError: container has 2 filled widgets");
+        fill = FALSE;
+    }
+    if(fill) {
+        bc->has_fill = TRUE;
+    }
+    //UiBool expand = fill;
+    
+    int a = *n;
+    XtSetArg(args[a], XmNleftAttachment, XmATTACH_FORM); a++;
+    XtSetArg(args[a], XmNrightAttachment, XmATTACH_FORM); a++;
+    if(fill) {
+        XtSetArg(args[a], XmNbottomAttachment, XmATTACH_FORM); a++;
+        bc->cur_fill = TRUE;
+    }
+    if(bc->prev_widget) {
+        XtSetArg(args[a], XmNtopAttachment, XmATTACH_WIDGET); a++;
+        XtSetArg(args[a], XmNtopWidget, bc->prev_widget); a++;
+    } else {
+        XtSetArg(args[a], XmNtopAttachment, XmATTACH_FORM); a++;
+    }
+    
+    *n += a;
+    return ct->widget;
+}
+
+void ui_vbox_container_add(UiContainer *ct, Widget widget) {
+    UiBoxContainer *bc = (UiBoxContainer*)ct;
+    if(bc->prev_widget) {
+        int v = 0;
+        XtVaGetValues(bc->prev_widget, XmNbottomAttachment, &v, 0);
+        if(v == XmATTACH_FORM) {
+            XtVaSetValues(
+                    bc->prev_widget,
+                    XmNbottomAttachment,
+                    XmATTACH_WIDGET,
+                    XmNbottomWidget,
+                    widget,
+                    0);
+            XtVaSetValues(
+                    widget,
+                    XmNtopAttachment,
+                    XmATTACH_NONE,
+                    XmNbottomAttachment,
+                    XmATTACH_FORM,
+                    0);
+        }
+    }
+    bc->prev_widget = widget;
+    if(bc->cur_fill) {
+        bc->filled_widget = widget;
+    }
+}
+
 
 UIWIDGET ui_sidebar(UiObject *obj) {
     UiContainer *ct = uic_get_current_container(obj);
@@ -55,7 +144,7 @@
     XtSetArg(args[n], XmNorientation, XmHORIZONTAL);
     n++;
     
-    Widget parent = ct->add(ct, args, &n);
+    Widget parent = ct->prepare(ct, args, &n, TRUE);
     Widget pane = XmCreatePanedWindow(parent, "pane", args, n);
     XtManageChild(pane);
     
@@ -87,7 +176,7 @@
     Arg args[16];
     
     UiContainer *ct = uic_get_current_container(obj);
-    Widget parent = ct->add(ct, args, &n);
+    Widget parent = ct->prepare(ct, args, &n, TRUE);
     
     Widget tabview = XmCreateForm(parent, "tabview_form", args, n);
     XtManageChild(tabview);