output: Refactor implementation of charts.

[pspp] / src / output / chart-provider.h

diff --git a/src/output/chart-provider.h b/src/output/chart-provider.h
new file mode 100644 (file)
index 0000000..4b36c55
--- /dev/null
+++ b/src/output/chart-provider.h
@@ -0,0 +1,74 @@
+/* PSPP - a program for statistical analysis.
+   Copyright (C) 2004, 2009 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
+   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 <http://www.gnu.org/licenses/>. */
+
+#ifndef OUTPUT_CHART_PROVIDER_H
+#define OUTPUT_CHART_PROVIDER_H 1
+
+#include <stdbool.h>
+#include <output/chart.h>
+
+struct chart_class
+  {
+    void (*draw) (const struct chart *, plPlotter *);
+    void (*destroy) (struct chart *);
+  };
+
+struct chart
+  {
+    const struct chart_class *class;
+    int ref_cnt;
+  };
+
+void chart_init (struct chart *, const struct chart_class *);
+bool chart_create_file (const char *type, const char *file_name_tmpl,
+                        int number, plPlotterParams *,
+                        char **file_namep, plPlotter **lpp);
+
+/* The geometry of a chart. */
+struct chart_geometry
+  {
+    int data_top   ;
+    int data_right ;
+    int data_bottom;
+    int data_left  ;
+
+    int abscissa_top;
+
+    int ordinate_right ;
+
+    int title_bottom ;
+
+    int legend_left ;
+    int legend_right ;
+
+    /* Default font size for the plot (if zero, then use plotter default) */
+    int font_size;
+
+    char fill_colour[10];
+
+    /* Stuff Particular to Cartesians (and Boxplots ) */
+    double ordinate_scale;
+    double abscissa_scale;
+    double x_min;
+    double x_max;
+    double y_min;
+    double y_max;
+  };
+
+void chart_geometry_init (plPlotter *, struct chart_geometry *);
+void chart_geometry_free (plPlotter *);
+
+#endif /* output/chart-provider.h */