LIST: Remove WEIGHT subcommand.

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

diff --git a/src/output/charts/plot-chart.c b/src/output/charts/plot-chart.c
index 98e4c866e8a7afeae0b0d2653c2dcdc6103904d2..cda6d1ec83ce5f431d6e75f93e3a607005308bc3 100644 (file)
--- a/src/output/charts/plot-chart.c
+++ b/src/output/charts/plot-chart.c
@@ -39,6 +39,26 @@
 
 #include "xalloc.h"
 
+#if ! PANGO_VERSION_CHECK (2, 22, 0)
+int pango_layout_get_baseline (PangoLayout    *layout);
+
+/* Shamelessly copied from the pango source */
+int
+pango_layout_get_baseline (PangoLayout    *layout)
+{
+  int baseline;
+
+  /* XXX this is so inefficient */
+  PangoLayoutIter *iter = pango_layout_get_iter (layout);
+  baseline = pango_layout_iter_get_baseline (iter);
+  pango_layout_iter_free (iter);
+
+  return baseline;
+}
+#endif
+
+
+
 const struct chart_colour data_colour[N_CHART_COLOURS] =
   {
     { 165, 42, 42 },            /* brown */
@@ -288,3 +308,49 @@ chart_write_ylabel (cairo_t *cr, const struct chart_geometry *geom,
   chart_label (cr, 'l', 'x', geom->font_size, label);
   cairo_restore (cr);
 }
+
+
+void
+chart_write_legend (cairo_t *cr, const struct chart_geometry *geom)
+{
+  int i;
+  const int vstep = geom->font_size * 2;
+  const int xpad = 10;
+  const int ypad = 10;
+  const int swatch = 20;
+  const int legend_top = geom->data_top;
+  const int legend_bottom = legend_top -
+    (vstep * geom->n_datasets + 2 * ypad );
+
+  cairo_save (cr);
+
+  cairo_rectangle (cr, geom->legend_left, legend_top,
+                   geom->legend_right - xpad - geom->legend_left,
+                   legend_bottom - legend_top);
+  cairo_stroke (cr);
+
+  for (i = 0 ; i < geom->n_datasets ; ++i )
+    {
+      const int ypos = legend_top - vstep * (i + 1);
+      const int xpos = geom->legend_left + xpad;
+      const struct chart_colour *colour;
+
+      cairo_move_to (cr, xpos, ypos);
+
+      cairo_save (cr);
+      colour = &data_colour [ i % N_CHART_COLOURS];
+      cairo_set_source_rgb (cr,
+                            colour->red / 255.0,
+                            colour->green / 255.0,
+                            colour->blue / 255.0);
+      cairo_rectangle (cr, xpos, ypos, swatch, swatch);
+      cairo_fill_preserve (cr);
+      cairo_stroke (cr);
+      cairo_restore (cr);
+
+      cairo_move_to (cr, xpos + swatch * 1.5, ypos);
+      chart_label (cr, 'l', 'x', geom->font_size, geom->dataset[i]);
+    }
+
+  cairo_restore (cr);
+}