1 files changed, 36 insertions, 0 deletions
diff --git a/vcl/unx/gtk4/notifyinglayout.hxx b/vcl/unx/gtk4/notifyinglayout.hxx
new file mode 100644
index 000000000..a717a3061
--- /dev/null
+++ b/vcl/unx/gtk4/notifyinglayout.hxx
@@ -0,0 +1,36 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ */
+
+#pragma once
+
+#include <gtk/gtk.h>
+#include <tools/link.hxx>
+
+G_BEGIN_DECLS
+
+G_DECLARE_FINAL_TYPE(NotifyingLayout, notifying_layout, NOTIFYING, LAYOUT, GtkLayoutManager)
+
+/*
+   Replace the existing GtkLayoutManager of pWidget with pLayout instead which will
+   forward all requests to the original GtkLayoutManager but additionally call
+   rLink when a size is allocated to the pWidget.
+
+   This provides a workaround for the removal of the size-allocate signal in gtk4
+*/
+void notifying_layout_start_watch(NotifyingLayout* pLayout, GtkWidget* pWidget,
+                                  const Link<void*, void>& rLink);
+
+/*
+   Undo a previous notifying_layout_start_watch.
+*/
+void notifying_layout_stop_watch(NotifyingLayout* pLayout);
+
+G_END_DECLS
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */