work on docs

[pspp] / src / output / chart.h

diff --git a/src/output/chart.h b/src/output/chart.h
index b05b5ba41accc41eeeccda56ff1a7bbeadb996a3..ac0bd372d9397733236d06bf4165fc93f81bd617 100644 (file)
--- a/src/output/chart.h
+++ b/src/output/chart.h
@@ -1,5 +1,5 @@
 /* PSPP - a program for statistical analysis.
-   Copyright (C) 2009 Free Software Foundation, Inc.
+   Copyright (C) 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
@@ -17,19 +17,29 @@
 #ifndef OUTPUT_CHART_H
 #define OUTPUT_CHART_H 1
 
-/* <plot.h> requires <stdio.h> but doesn't #include it. */
-#include <stdio.h>
+/* Charts.
 
-#ifdef HAVE_CHARTS
-#include <plot.h>
-#else
-#include <output/charts/libplot-dummy.h>
-#endif
+   A chart is abstract.  Every actual chart is a subclass of chart. */
 
-struct chart;
+#include <stdbool.h>
+
+/* A chart.
+
+   The members of struct chart should not be accessed directly.  Use one
+   of the accessor functions defined below. */
+struct chart
+  {
+    int ref_cnt;
+    const struct chart_class *class; /* Subclass. */
+    char *title;                /* May be null if there is no title. */
+  };
 
 struct chart *chart_ref (const struct chart *);
 void chart_unref (struct chart *);
+bool chart_is_shared (const struct chart *);
+
+const char *chart_get_title (const struct chart *);
+void chart_set_title (struct chart *, const char *);
 
 void chart_submit (struct chart *);