/* PSPP - a program for statistical analysis.
- Copyright (C) 2004, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2008, 2009, 2011 Free Software Foundation, Inc.
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
#ifndef OUTPUT_CHARTS_NP_PLOT_H
#define OUTPUT_CHARTS_NP_PLOT_H 1
-struct casereader;
+#include "output/chart.h"
+
struct np;
-struct chart *np_plot_create (const struct np *, const struct casereader *,
- const char *label);
-struct chart *dnp_plot_create (const struct np *, const struct casereader *,
- const char *label);
+/* An NP or DNP plot. */
+struct np_plot_chart
+ {
+ struct chart chart;
+ struct casereader *data;
+ bool detrended;
+
+ /* Copied directly from struct np. */
+ double y_min, y_max;
+ double dns_min, dns_max;
+
+ /* Calculated. */
+ double slope, intercept;
+ double y_first, y_last;
+ double x_lower, x_upper;
+ double slack;
+ };
+
+struct chart *np_plot_create (const struct np *,
+ const struct casereader *,
+ const char *label);
+struct chart *dnp_plot_create (const struct np *,
+ const struct casereader *,
+ const char *label);
+\f
+/* This boilerplate for np_plot_chart, a subclass of chart, was
+ autogenerated by mk-class-boilerplate. */
+
+#include <assert.h>
+#include "libpspp/cast.h"
+
+extern const struct chart_class np_plot_chart_class;
+
+/* Returns true if SUPER is a np_plot_chart, otherwise false. */
+static inline bool
+is_np_plot_chart (const struct chart *super)
+{
+ return super->class == &np_plot_chart_class;
+}
+
+/* Returns SUPER converted to np_plot_chart. SUPER must be a np_plot_chart, as
+ reported by is_np_plot_chart. */
+static inline struct np_plot_chart *
+to_np_plot_chart (const struct chart *super)
+{
+ assert (is_np_plot_chart (super));
+ return UP_CAST (super, struct np_plot_chart, chart);
+}
+
+/* Returns INSTANCE converted to chart. */
+static inline struct chart *
+np_plot_chart_super (const struct np_plot_chart *instance)
+{
+ return CONST_CAST (struct chart *, &instance->chart);
+}
+
+/* Increments INSTANCE's reference count and returns INSTANCE. */
+static inline struct np_plot_chart *
+np_plot_chart_ref (const struct np_plot_chart *instance)
+{
+ return to_np_plot_chart (chart_ref (&instance->chart));
+}
+
+/* Decrements INSTANCE's reference count, then destroys INSTANCE if
+ the reference count is now zero. */
+static inline void
+np_plot_chart_unref (struct np_plot_chart *instance)
+{
+ chart_unref (&instance->chart);
+}
+
+/* Returns true if INSTANCE's reference count is greater than 1,
+ false otherwise. */
+static inline bool
+np_plot_chart_is_shared (const struct np_plot_chart *instance)
+{
+ return chart_is_shared (&instance->chart);
+}
+static inline void
+np_plot_chart_submit (struct np_plot_chart *instance)
+{
+ chart_submit (&instance->chart);
+}
+\f
#endif /* output/charts/np-plot.h */