#include <math.h>
#include <assert.h>
+#include <cairo/cairo.h>
#include <libpspp/misc.h>
#include <math/chart-geometry.h>
* at CENTRELINE
*/
static void
-draw_case (plPlotter *lp, const struct chart_geometry *geom, double centreline,
+draw_case (cairo_t *cr, const struct chart_geometry *geom, double centreline,
const struct outlier *outlier)
{
+ double y = geom->data_bottom + (outlier->value - geom->y_min) * geom->ordinate_scale;
+ chart_draw_marker (cr, centreline, y,
+ outlier->extreme ? MARKER_ASTERISK : MARKER_CIRCLE,
+ 20);
-#define MARKER_CIRCLE 4
-#define MARKER_STAR 3
-
- pl_fmarker_r(lp,
- centreline,
- geom->data_bottom + (outlier->value - geom->y_min) * geom->ordinate_scale,
- outlier->extreme ? MARKER_STAR : MARKER_CIRCLE,
- 20);
-
- pl_moverel_r(lp, 10,0);
-
- pl_alabel_r(lp, 'l', 'c', ds_cstr (&outlier->label));
+ cairo_move_to (cr, centreline + 10, y);
+ chart_label (cr, 'l', 'c', ds_cstr (&outlier->label));
}
static void
-boxplot_draw_box (plPlotter *lp, const struct chart_geometry *geom,
+boxplot_draw_box (cairo_t *cr, const struct chart_geometry *geom,
double box_centre,
double box_width,
const struct box_whisker *bw,
top_whisker = geom->data_bottom + (whisker[1] - geom->y_min) * geom->ordinate_scale;
- pl_savestate_r(lp);
-
/* Draw the box */
- pl_savestate_r (lp);
- pl_fillcolor_r (lp,
- geom->fill_colour.red * 257,
- geom->fill_colour.green * 257,
- geom->fill_colour.blue * 257);
- pl_filltype_r (lp,1);
- pl_fbox_r (lp,
- box_left,
- box_bottom,
- box_right,
- box_top);
-
- pl_restorestate_r (lp);
+ cairo_rectangle (cr,
+ box_left,
+ box_bottom,
+ box_right - box_left,
+ box_top - box_bottom);
+ cairo_save (cr);
+ cairo_set_source_rgb (cr,
+ geom->fill_colour.red / 255.0,
+ geom->fill_colour.green / 255.0,
+ geom->fill_colour.blue / 255.0);
+ cairo_fill (cr);
+ cairo_restore (cr);
+ cairo_stroke (cr);
/* Draw the median */
- pl_savestate_r (lp);
- pl_linewidth_r (lp, 5);
- pl_fline_r (lp,
- box_left,
- geom->data_bottom + (hinge[1] - geom->y_min) * geom->ordinate_scale,
- box_right,
- geom->data_bottom + (hinge[1] - geom->y_min) * geom->ordinate_scale);
- pl_restorestate_r (lp);
+ cairo_save (cr);
+ cairo_set_line_width (cr, cairo_get_line_width (cr) * 5);
+ cairo_move_to (cr,
+ box_left,
+ geom->data_bottom + (hinge[1] - geom->y_min) * geom->ordinate_scale);
+ cairo_line_to (cr,
+ box_right,
+ geom->data_bottom + (hinge[1] - geom->y_min) * geom->ordinate_scale);
+ cairo_stroke (cr);
+ cairo_restore (cr);
/* Draw the bottom whisker */
- pl_fline_r (lp,
- box_left,
- bottom_whisker,
- box_right,
- bottom_whisker);
+ cairo_move_to (cr, box_left, bottom_whisker);
+ cairo_line_to (cr, box_right, bottom_whisker);
+ cairo_stroke (cr);
/* Draw top whisker */
- pl_fline_r (lp,
- box_left,
- top_whisker,
- box_right,
- top_whisker);
-
+ cairo_move_to (cr, box_left, top_whisker);
+ cairo_line_to (cr, box_right, top_whisker);
+ cairo_stroke (cr);
/* Draw centre line.
(bottom half) */
- pl_fline_r (lp,
- box_centre, bottom_whisker,
- box_centre, box_bottom);
+ cairo_move_to (cr, box_centre, bottom_whisker);
+ cairo_line_to (cr, box_centre, box_bottom);
+ cairo_stroke (cr);
/* (top half) */
- pl_fline_r (lp,
- box_centre, top_whisker,
- box_centre, box_top);
+ cairo_move_to (cr, box_centre, top_whisker);
+ cairo_line_to (cr, box_centre, box_top);
+ cairo_stroke (cr);
outliers = box_whisker_outliers (bw);
for (ll = ll_head (outliers);
ll != ll_null (outliers); ll = ll_next (ll))
{
const struct outlier *outlier = ll_data (ll, struct outlier, ll);
- draw_case (lp, geom, box_centre, outlier);
+ draw_case (cr, geom, box_centre, outlier);
}
/* Draw tick mark on x axis */
- draw_tick(lp, geom, TICK_ABSCISSA, box_centre - geom->data_left, "%s", name);
-
- pl_restorestate_r(lp);
+ draw_tick(cr, geom, TICK_ABSCISSA, box_centre - geom->data_left, "%s", name);
}
static void
-boxplot_draw_yscale (plPlotter *lp, struct chart_geometry *geom,
+boxplot_draw_yscale (cairo_t *cr, struct chart_geometry *geom,
double y_max, double y_min)
{
double y_tick;
geom->ordinate_scale = (fabs (geom->data_top - geom->data_bottom)
/ fabs (geom->y_max - geom->y_min));
- /* Move to data bottom-left */
- pl_move_r (lp, geom->data_left, geom->data_bottom);
-
for (d = geom->y_min; d <= geom->y_max; d += y_tick)
- draw_tick (lp, geom, TICK_ORDINATE,
+ draw_tick (cr, geom, TICK_ORDINATE,
(d - geom->y_min) * geom->ordinate_scale, "%g", d);
}
static void
-boxplot_chart_draw (const struct chart *chart, plPlotter *lp,
+boxplot_chart_draw (const struct chart *chart, cairo_t *cr,
struct chart_geometry *geom)
{
const struct boxplot *boxplot = (struct boxplot *) chart;
double box_width;
size_t i;
- boxplot_draw_yscale (lp, geom, boxplot->y_max, boxplot->y_min);
- chart_write_title (lp, geom, "%s", boxplot->title);
+ boxplot_draw_yscale (cr, geom, boxplot->y_max, boxplot->y_min);
+ chart_write_title (cr, geom, "%s", boxplot->title);
box_width = (geom->data_right - geom->data_left) / boxplot->n_boxes / 2.0;
for (i = 0; i < boxplot->n_boxes; i++)
{
const struct box *box = &boxplot->boxes[i];
const double box_centre = (i * 2 + 1) * box_width + geom->data_left;
- boxplot_draw_box (lp, geom, box_centre, box_width, box->bw, box->label);
+ boxplot_draw_box (cr, geom, box_centre, box_width, box->bw, box->label);
}
}
projects / pspp-builds.git / blobdiff