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diff --git a/src/gtkext/graph/ranks.h b/src/gtkext/graph/ranks.h
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+
+/* OpenIDA - Outil d'analyse de fichiers binaires
+ * ranks.h - prototypes pour le calcul de l'ordonnée des différents classements
+ *
+ * Copyright (C) 2013 Cyrille Bagard
+ *
+ *  This file is part of OpenIDA.
+ *
+ *  OpenIDA is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  OpenIDA is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with Foobar.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+#ifndef _GTKEXT_GRAPH_RANKS_H
+#define _GTKEXT_GRAPH_RANKS_H
+
+
+#include <glib-object.h>
+
+
+
+#define G_TYPE_GRAPH_RANKS               g_graph_ranks_get_type()
+#define G_GRAPH_RANKS(obj)               (G_TYPE_CHECK_INSTANCE_CAST((obj), g_graph_ranks_get_type(), GGraphRanks))
+#define G_IS_GRAPH_RANKS(obj)            (G_TYPE_CHECK_INSTANCE_TYPE((obj), g_graph_ranks_get_type()))
+#define G_GRAPH_RANKS_GET_IFACE(inst)    (G_TYPE_INSTANCE_GET_INTERFACE((inst), g_graph_ranks_get_type(), GGraphRanksIface))
+#define G_GRAPH_RANKS_GET_CLASS(obj)     (G_TYPE_INSTANCE_GET_CLASS((obj), G_TYPE_GRAPH_RANKS, GGraphRanksClass))
+
+
+/* Calcul de l'ordonnée des différents classements (instance) */
+typedef struct _GGraphRanks GGraphRanks;
+
+/* Calcul de l'ordonnée des différents classements (classe) */
+typedef struct _GGraphRanksClass GGraphRanksClass;
+
+
+/* Indique le type définit par la GLib pour le calcul de l'ordonnée des classements. */
+GType g_graph_ranks_get_type(void);
+
+/* Prépare de quoi se définir au mieux les ordonnées des noeuds. */
+GGraphRanks *g_graph_ranks_new(unsigned int);
+
+/* Note une hauteur minimale requise pour un rang du classement. */
+void g_graph_ranks_set_min_height(GGraphRanks *, unsigned int, gint);
+
+/* Calcule l'ordonnée finale de chaque rang du classement. */
+void g_graph_ranks_compute_y_line(GGraphRanks *);
+
+/* Fournit la position verticale correspondant à un rang donné. */
+gint g_graph_ranks_get_y_for_rank(const GGraphRanks *, unsigned int);
+
+
+
+#endif  /* _GTKEXT_GRAPH_RANKS_H */