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diff --git a/libgimpwidgets/gimpunitstore.h b/libgimpwidgets/gimpunitstore.h
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+/* LIBGIMP - The GIMP Library
+ * Copyright (C) 1995-1997 Peter Mattis and Spencer Kimball
+ *
+ * gimpunitstore.h
+ * Copyright (C) 2004 Sven Neumann <sven@gimp.org>
+ *
+ * This library is free software: you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 3 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library. If not, see
+ * <https://www.gnu.org/licenses/>.
+ */
+
+#if !defined (__GIMP_WIDGETS_H_INSIDE__) && !defined (GIMP_WIDGETS_COMPILATION)
+#error "Only <libgimpwidgets/gimpwidgets.h> can be included directly."
+#endif
+
+#ifndef __GIMP_UNIT_STORE_H__
+#define __GIMP_UNIT_STORE_H__
+
+G_BEGIN_DECLS
+
+
+enum
+{
+ GIMP_UNIT_STORE_UNIT,
+ GIMP_UNIT_STORE_UNIT_FACTOR,
+ GIMP_UNIT_STORE_UNIT_DIGITS,
+ GIMP_UNIT_STORE_UNIT_IDENTIFIER,
+ GIMP_UNIT_STORE_UNIT_SYMBOL,
+ GIMP_UNIT_STORE_UNIT_ABBREVIATION,
+ GIMP_UNIT_STORE_UNIT_SINGULAR,
+ GIMP_UNIT_STORE_UNIT_PLURAL,
+ GIMP_UNIT_STORE_UNIT_SHORT_FORMAT,
+ GIMP_UNIT_STORE_UNIT_LONG_FORMAT,
+ GIMP_UNIT_STORE_UNIT_COLUMNS,
+ GIMP_UNIT_STORE_FIRST_VALUE = GIMP_UNIT_STORE_UNIT_COLUMNS
+};
+
+
+#define GIMP_TYPE_UNIT_STORE (gimp_unit_store_get_type ())
+#define GIMP_UNIT_STORE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_UNIT_STORE, GimpUnitStore))
+#define GIMP_UNIT_STORE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_UNIT_STORE, GimpUnitStoreClass))
+#define GIMP_IS_UNIT_STORE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_UNIT_STORE))
+#define GIMP_IS_UNIT_STORE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_UNIT_STORE))
+#define GIMP_UNIT_STORE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_UNIT_STORE, GimpUnitStoreClass))
+
+
+typedef struct _GimpUnitStoreClass GimpUnitStoreClass;
+
+struct _GimpUnitStore
+{
+ GObject parent_instance;
+};
+
+struct _GimpUnitStoreClass
+{
+ GObjectClass parent_class;
+
+ /* Padding for future expansion */
+ void (*_gtk_reserved1) (void);
+ void (*_gtk_reserved2) (void);
+ void (*_gtk_reserved3) (void);
+ void (*_gtk_reserved4) (void);
+};
+
+
+GType gimp_unit_store_get_type (void) G_GNUC_CONST;
+
+GimpUnitStore * gimp_unit_store_new (gint num_values);
+
+void gimp_unit_store_set_has_pixels (GimpUnitStore *store,
+ gboolean has_pixels);
+gboolean gimp_unit_store_get_has_pixels (GimpUnitStore *store);
+
+void gimp_unit_store_set_has_percent (GimpUnitStore *store,
+ gboolean has_percent);
+gboolean gimp_unit_store_get_has_percent (GimpUnitStore *store);
+
+void gimp_unit_store_set_pixel_value (GimpUnitStore *store,
+ gint index,
+ gdouble value);
+void gimp_unit_store_set_pixel_values (GimpUnitStore *store,
+ gdouble first_value,
+ ...);
+void gimp_unit_store_set_resolution (GimpUnitStore *store,
+ gint index,
+ gdouble resolution);
+void gimp_unit_store_set_resolutions (GimpUnitStore *store,
+ gdouble first_resolution,
+ ...);
+gdouble gimp_unit_store_get_value (GimpUnitStore *store,
+ GimpUnit unit,
+ gint index);
+void gimp_unit_store_get_values (GimpUnitStore *store,
+ GimpUnit unit,
+ gdouble *first_value,
+ ...);
+
+void _gimp_unit_store_sync_units (GimpUnitStore *store);
+
+
+G_END_DECLS
+
+#endif /* __GIMP_UNIT_STORE_H__ */