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+/* GIMP - The GNU Image Manipulation Program
+ * Copyright (C) 1995 Spencer Kimball and Peter Mattis
+ *
+ * gimptoolline.h
+ * Copyright (C) 2017 Michael Natterer <mitch@gimp.org>
+ *
+ * This program 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.
+ *
+ * This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef __GIMP_TOOL_LINE_H__
+#define __GIMP_TOOL_LINE_H__
+
+
+#include "gimptoolwidget.h"
+
+
+/* in the context of GimpToolLine, "handle" is a collective term for either an
+ * endpoint or a slider. a handle value may be either a (nonnegative) slider
+ * index, or one of the values below:
+ */
+#define GIMP_TOOL_LINE_HANDLE_NONE (-3)
+#define GIMP_TOOL_LINE_HANDLE_START (-2)
+#define GIMP_TOOL_LINE_HANDLE_END (-1)
+
+#define GIMP_TOOL_LINE_HANDLE_IS_SLIDER(handle) ((handle) >= 0)
+
+
+#define GIMP_TYPE_TOOL_LINE (gimp_tool_line_get_type ())
+#define GIMP_TOOL_LINE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GIMP_TYPE_TOOL_LINE, GimpToolLine))
+#define GIMP_TOOL_LINE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GIMP_TYPE_TOOL_LINE, GimpToolLineClass))
+#define GIMP_IS_TOOL_LINE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GIMP_TYPE_TOOL_LINE))
+#define GIMP_IS_TOOL_LINE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GIMP_TYPE_TOOL_LINE))
+#define GIMP_TOOL_LINE_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GIMP_TYPE_TOOL_LINE, GimpToolLineClass))
+
+
+typedef struct _GimpToolLine GimpToolLine;
+typedef struct _GimpToolLinePrivate GimpToolLinePrivate;
+typedef struct _GimpToolLineClass GimpToolLineClass;
+
+struct _GimpToolLine
+{
+ GimpToolWidget parent_instance;
+
+ GimpToolLinePrivate *private;
+};
+
+struct _GimpToolLineClass
+{
+ GimpToolWidgetClass parent_class;
+
+ /* signals */
+ gboolean (* can_add_slider) (GimpToolLine *line,
+ gdouble value);
+ gint (* add_slider) (GimpToolLine *line,
+ gdouble value);
+ void (* prepare_to_remove_slider) (GimpToolLine *line,
+ gint slider,
+ gboolean remove);
+ void (* remove_slider) (GimpToolLine *line,
+ gint slider);
+ void (* selection_changed) (GimpToolLine *line);
+ gboolean (* handle_clicked) (GimpToolLine *line,
+ gint handle,
+ GdkModifierType state,
+ GimpButtonPressType press_type);
+};
+
+
+GType gimp_tool_line_get_type (void) G_GNUC_CONST;
+
+GimpToolWidget * gimp_tool_line_new (GimpDisplayShell *shell,
+ gdouble x1,
+ gdouble y1,
+ gdouble x2,
+ gdouble y2);
+
+void gimp_tool_line_set_sliders (GimpToolLine *line,
+ const GimpControllerSlider *sliders,
+ gint n_sliders);
+const GimpControllerSlider * gimp_tool_line_get_sliders (GimpToolLine *line,
+ gint *n_sliders);
+
+void gimp_tool_line_set_selection (GimpToolLine *line,
+ gint handle);
+gint gimp_tool_line_get_selection (GimpToolLine *line);
+
+
+#endif /* __GIMP_TOOL_LINE_H__ */