diff -r ae999e3346a9 -r baf9bcc98d87 ui/gtk/container.c
--- a/ui/gtk/container.c	Sun Oct 27 08:53:32 2024 +0100
+++ b/ui/gtk/container.c	Sun Oct 27 09:01:46 2024 +0100
@@ -253,6 +253,27 @@
     FRAME_SET_CHILD(ct->widget, widget);
 }
 
+UiContainer* ui_expander_container(UiObject *obj, GtkWidget *expander) {
+    UiContainer *ct = cxCalloc(
+            obj->ctx->allocator,
+            1,
+            sizeof(UiContainer));
+    ct->widget = expander;
+    ct->add = ui_expander_container_add;
+    return ct;
+}
+
+void ui_expander_container_add(UiContainer *ct, GtkWidget *widget, UiBool fill) {
+    EXPANDER_SET_CHILD(ct->widget, widget);
+}
+
+void ui_scrolledwindow_container_add(UiContainer *ct, GtkWidget *widget, UiBool fill) {
+    // TODO: check if the widget implements GtkScrollable
+    SCROLLEDWINDOW_SET_CHILD(ct->widget, widget);
+    ui_reset_layout(ct->layout);
+    ct->current = widget;
+}
+
 UiContainer* ui_scrolledwindow_container(UiObject *obj, GtkWidget *scrolledwindow) {
     UiContainer *ct = cxCalloc(
             obj->ctx->allocator,
@@ -263,13 +284,6 @@
     return ct;
 }
 
-void ui_scrolledwindow_container_add(UiContainer *ct, GtkWidget *widget, UiBool fill) {
-    // TODO: check if the widget implements GtkScrollable
-    SCROLLEDWINDOW_SET_CHILD(ct->widget, widget);
-    ui_reset_layout(ct->layout);
-    ct->current = widget;
-}
-
 UiContainer* ui_tabview_container(UiObject *obj, GtkWidget *tabview) {
     UiTabViewContainer *ct = cxCalloc(
             obj->ctx->allocator,
@@ -383,10 +397,32 @@
         newobj->widget = frame;
         newobj->container = ui_frame_container(obj, frame);
     }
+    current->container->add(current->container, frame, FALSE);
+    uic_obj_add(obj, newobj);
     
     return frame;
 }
 
+UIEXPORT UIWIDGET ui_expander_create(UiObject *obj, UiFrameArgs args) {
+    UiObject* current = uic_current_obj(obj);
+    UI_APPLY_LAYOUT1(current, args);
+    
+    GtkWidget *expander = gtk_expander_new(args.label);
+    gtk_expander_set_expanded(GTK_EXPANDER(expander), args.isexpanded);
+    UiObject *newobj = uic_object_new(obj, expander);
+    GtkWidget *sub = ui_subcontainer_create(args.subcontainer, newobj, args.spacing, args.columnspacing, args.rowspacing, args.margin);
+    if(sub) {
+        EXPANDER_SET_CHILD(expander, sub);
+    } else {
+        newobj->widget = expander;
+        newobj->container = ui_expander_container(obj, expander);
+    }
+    current->container->add(current->container, expander, FALSE);
+    uic_obj_add(obj, newobj);
+    
+    return expander;
+}
+
 
 UIWIDGET ui_scrolledwindow_create(UiObject* obj, UiFrameArgs args) {
     UiObject* current = uic_current_obj(obj);