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diff --git a/offapi/com/sun/star/awt/XLayoutFlow.idl b/offapi/com/sun/star/awt/XLayoutFlow.idl
new file mode 100644
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+++ b/offapi/com/sun/star/awt/XLayoutFlow.idl
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+#ifndef __com_sun_star_awt_XLayoutFlow_idl__
+#define __com_sun_star_awt_XLayoutFlow_idl__
+
+//=============================================================================
+
+#include <com/sun/star/uno/XInterface.idl>
+
+module com {  module sun {  module star {  module awt {
+
+//=============================================================================
+
+/** Enables height-for-width layout negociations, which allows for label wrapping
+    and flow containers. Can be implemented by either a container or an ordinary widget;
+    whether its parent will honor it is another story, so keep implementing
+    getMinimumSize().
+
+    @since OOo 3.0
+ */
+interface XLayoutFlow
+{
+    /** returns the prefered high this layout element would need for the given width. */
+    long getHeightForWidth( [in] long Width );
+
+    /** Allow the container/widget to toggle the functionality. */
+    boolean hasHeightForWidth();
+};
+
+//=============================================================================
+
+}; }; }; };
+
+#endif