Add GtkLayoutManager

A base abstract class for layout manager delegate objects.

Layout managers are associated to a single widget, like event
controllers, and are responsible for measuring and allocating the
children of the widget they are bound to.

1 files changed, 10 insertions, 0 deletions

diff --git a/gtk/gtklayoutmanagerprivate.h b/gtk/gtklayoutmanagerprivate.h
new file mode 100644
index 0000000000..d02ed56a6f
--- /dev/null
+++ b/gtk/gtklayoutmanagerprivate.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#include "gtklayoutmanager.h"
+
+G_BEGIN_DECLS
+
+void gtk_layout_manager_set_widget (GtkLayoutManager *manager,
+                                    GtkWidget        *widget);
+
+G_END_DECLS