output: Use Cairo and Pango to draw charts, instead of libplot.

[pspp-builds.git] / src / output / charts / plot-chart.h

diff --git a/src/output/charts/plot-chart.h b/src/output/charts/plot-chart.h
index e8bb7d42ce8befdbcbf27c4e2bfb2e68959771c4..1a44212ce1fd27ccf552913a113480af4168ded0 100644 (file)
--- a/src/output/charts/plot-chart.h
+++ b/src/output/charts/plot-chart.h
@@ -1,23 +1,23 @@
-/* PSPP - computes sample statistics.
-   Copyright (C) 2004 Free Software Foundation, Inc.
-   Written by John Darrington <john@darrington.wattle.id.au>
+/* 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 2 of the
-   License, or (at your option) any later version.
+   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.
+   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, write to the Free Software
-   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
-   02110-1301, USA. */
+   along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
-#include <config.h>
+#ifndef PLOT_CHART_H
+#define PLOT_CHART_H
+
+#include <cairo/cairo.h>
 #include <stdio.h>
 #include <stdarg.h>
 #include <string.h>
@@ -29,44 +29,68 @@
 
 #include <math/chart-geometry.h>
 #include <output/chart.h>
+#include <output/chart-provider.h>
 
+#include <libpspp/compiler.h>
 #include <libpspp/str.h>
-#include <libpspp/alloc.h>
 #include <output/manager.h>
 #include <output/output.h>
 
+#define N_CHART_COLOURS 9
+extern const struct chart_colour data_colour[];
 
-#ifndef PLOT_CHART_H
-#define PLOT_CHART_H
+enum tick_orientation
+  {
+    TICK_ABSCISSA=0,
+    TICK_ORDINATE
+  };
+
+struct chart_geometry;
 
-                                                            
-extern const char *data_colour[];
 
-enum tick_orientation {
-  TICK_ABSCISSA=0,
-  TICK_ORDINATE
-};
+enum marker_type
+  {
+    MARKER_CIRCLE,              /* Hollow circle. */
+    MARKER_ASTERISK,            /* Asterisk (*). */
+    MARKER_SQUARE               /* Hollow square. */
+  };
 
+void chart_draw_marker (cairo_t *, double x, double y, enum marker_type,
+                        double size);
+
+void chart_label (cairo_t *, int horz_justify, int vert_justify,
+                  const char *);
 
 /* Draw a tick mark at position
    If label is non zero, then print it at the tick mark
 */
-void draw_tick(struct chart *chart, 
-         enum tick_orientation orientation, 
-         double position, 
-              const char *label, ...);
+void draw_tick(cairo_t *, const struct chart_geometry *,
+         enum tick_orientation orientation,
+         double position,
+              const char *label, ...)
+  PRINTF_FORMAT (5, 6);
 
 
 /* Write the title on a chart*/
-void   chart_write_title(struct chart *chart, const char *title, ...);
+void   chart_write_title(cairo_t *, const struct chart_geometry *,
+                         const char *title, ...)
+  PRINTF_FORMAT (3, 4);
 
 
 /* Set the scale for the abscissa */
-void  chart_write_xscale(struct chart *ch, double min, double max, int ticks);
+void  chart_write_xscale(cairo_t *, struct chart_geometry *,
+                         double min, double max, int ticks);
 
 
 /* Set the scale for the ordinate */
-void  chart_write_yscale(struct chart *ch, double smin, double smax, int ticks);
+void  chart_write_yscale(cairo_t *, struct chart_geometry *,
+                         double smin, double smax, int ticks);
+
+void chart_write_xlabel(cairo_t *, const struct chart_geometry *,
+                        const char *label) ;
 
+/* Write the ordinate label */
+void  chart_write_ylabel(cairo_t *, const struct chart_geometry *,
+                         const char *label);
 
 #endif