canvasL Item gets packing options similar to GTK

libs/canvas/canvas/item.h

@@ -236,6 +236,9 @@ public:
 	void lower_child_to_bottom (Item *);
 	virtual void child_changed (bool bbox_changed);
 
+	PackOptions pack_options () const { return _pack_options; }
+	void set_pack_options (PackOptions);
+
 	static int default_items_per_cell;
 
 
@@ -330,6 +333,7 @@ public:
 	mutable Rect _bounding_box;
 	/** true if _bounding_box might be out of date, false if its definitely not */
 	mutable bool _bounding_box_dirty;
+	PackOptions _pack_options;
 
 	void bb_clean () const;
 

libs/canvas/canvas/types.h

@@ -195,10 +195,14 @@ struct LIBCANVAS_API Rect
 };
 
 enum PackOptions {
-	PackExpand = 0x1,
-	PackFill = 0x2,
-	PackFromStart = 0x4,
-	PackFromEnd = 0x8
+	PackExpand = 0x1, /* use all available space ... */
+	PackFill = 0x2,   /* if PackExpand set, this means actually
+	                     expand size of Item; if PackExpand not
+	                     set, this does nothing.
+	                  */
+	PackShrink = 0x4, /* allow Item to be smaller than its natural size */
+	PackFromStart = 0x8,
+	PackFromEnd = 0x10
 };
 
 extern LIBCANVAS_API std::ostream & operator<< (std::ostream &, Rect const &);

libs/canvas/item.cc

@@ -43,6 +43,7 @@ Item::Item (Canvas* canvas)
 	, _scroll_parent (0)
 	, _visible (true)
 	, _bounding_box_dirty (true)
+	, _pack_options (PackOptions (0))
 	, _layout_sensitive (false)
 	, _intrinsic_width (-1.)
 	, _intrinsic_height(-1.)
@@ -63,6 +64,7 @@ Item::Item (Item* parent)
 	, _scroll_parent (0)
 	, _visible (true)
 	, _bounding_box_dirty (true)
+	, _pack_options (PackOptions (0))
 	, _layout_sensitive (false)
 	, _intrinsic_width (-1.)
 	, _intrinsic_height(-1.)
@@ -90,6 +92,7 @@ Item::Item (Item* parent, Duple const& p)
 	, _position (p)
 	, _visible (true)
 	, _bounding_box_dirty (true)
+	, _pack_options (PackOptions (0))
 	, _layout_sensitive (false)
 	, _intrinsic_width (-1.)
 	, _intrinsic_height(-1.)