constraint: Add BindConstraint

The BindConstraint object is a constraint that binds the current
position of an actor on a given axis to the actor that has the
constraint applied.

clutter/clutter-bind-constraint.h

@@ -0,0 +1,32 @@
+#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
+#error "Only <clutter/clutter.h> can be included directly."
+#endif
+
+#ifndef __CLUTTER_BIND_CONSTRAINT_H__
+#define __CLUTTER_BIND_CONSTRAINT_H__
+
+#include <clutter/clutter-constraint.h>
+
+G_BEGIN_DECLS
+
+#define CLUTTER_TYPE_BIND_CONSTRAINT    (clutter_bind_constraint_get_type ())
+#define CLUTTER_BIND_CONSTRAINT(obj)    (G_TYPE_CHECK_INSTANCE_CAST ((obj), CLUTTER_TYPE_BIND_CONSTRAINT, ClutterBindConstraint))
+#define CLUTTER_IS_BIND_CONSTRAINT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), CLUTTER_TYPE_BIND_CONSTRAINT))
+
+typedef struct _ClutterBindConstraint   ClutterBindConstraint;
+
+typedef enum { /*< prefix=CLUTTER_BIND >*/
+  CLUTTER_BIND_X_AXIS,
+  CLUTTER_BIND_Y_AXIS,
+  CLUTTER_BIND_Z_AXIS
+} ClutterBindAxis;
+
+GType clutter_bind_constraint_get_type (void) G_GNUC_CONST;
+
+ClutterConstraint *clutter_bind_constraint_new (ClutterActor    *source,
+                                                ClutterBindAxis  axis,
+                                                gfloat           offset);
+
+G_END_DECLS
+
+#endif /* __CLUTTER_BIND_CONSTRAINT_H__ */