/* PSPP - a program for statistical analysis.
- Copyright (C) 2004 Free Software Foundation, Inc.
+ 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
#include <config.h>
-#include <stdio.h>
-#include <plot.h>
-#include <stdarg.h>
-#include <string.h>
-#include <stdio.h>
-#include <float.h>
+#include <output/charts/plot-chart.h>
+
#include <assert.h>
+#include <float.h>
#include <math.h>
+#include <pango/pango-font.h>
+#include <pango/pango-layout.h>
+#include <pango/pango.h>
+#include <pango/pangocairo.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdio.h>
+#include <string.h>
-#include <output/charts/plot-chart.h>
-
+#include <libpspp/assertion.h>
+#include <libpspp/str.h>
#include <math/chart-geometry.h>
+#include <output/chart-provider.h>
+#include <output/manager.h>
+#include <output/output.h>
+#include "xalloc.h"
+
+const struct chart_colour data_colour[N_CHART_COLOURS] =
+ {
+ { 165, 42, 42 }, /* brown */
+ { 255, 0, 0 }, /* red */
+ { 255, 165, 0 }, /* orange */
+ { 255, 255, 0 }, /* yellow */
+ { 0, 255, 0 }, /* green */
+ { 0, 0, 255 }, /* blue */
+ { 238, 130, 238 }, /* violet */
+ { 190, 190, 190 }, /* grey */
+ { 255, 192, 203 }, /* pink */
+ };
+void
+chart_draw_marker (cairo_t *cr, double x, double y, enum marker_type marker,
+ double size)
+{
+ cairo_save (cr);
+ cairo_translate (cr, x, y);
+ cairo_scale (cr, size / 2.0, size / 2.0);
+ cairo_set_line_width (cr, cairo_get_line_width (cr) / (size / 2.0));
+ switch (marker)
+ {
+ case MARKER_CIRCLE:
+ cairo_arc (cr, 0, 0, 1.0, 0, 2 * M_PI);
+ cairo_stroke (cr);
+ break;
+
+ case MARKER_ASTERISK:
+ cairo_move_to (cr, 0, -1.0); /* | */
+ cairo_line_to (cr, 0, 1.0);
+ cairo_move_to (cr, -M_SQRT1_2, -M_SQRT1_2); /* / */
+ cairo_line_to (cr, M_SQRT1_2, M_SQRT1_2);
+ cairo_move_to (cr, -M_SQRT1_2, M_SQRT1_2); /* \ */
+ cairo_line_to (cr, M_SQRT1_2, -M_SQRT1_2);
+ cairo_stroke (cr);
+ break;
+
+ case MARKER_SQUARE:
+ cairo_rectangle (cr, -1.0, -1.0, 2.0, 2.0);
+ cairo_stroke (cr);
+ break;
+ }
+ cairo_restore (cr);
+}
-#include <libpspp/str.h>
-#include <libpspp/alloc.h>
-#include <libpspp/assertion.h>
-#include <output/manager.h>
-#include <output/output.h>
+void
+chart_label (cairo_t *cr, int horz_justify, int vert_justify,
+ const char *string)
+{
+ PangoFontDescription *desc;
+ PangoLayout *layout;
+ double x, y;
+ desc = pango_font_description_from_string ("sans serif");
+ if (desc == NULL)
+ {
+ cairo_new_path (cr);
+ return;
+ }
+ pango_font_description_set_absolute_size (desc, 15 * PANGO_SCALE);
+
+ cairo_save (cr);
+ cairo_get_current_point (cr, &x, &y);
+ cairo_translate (cr, x, y);
+ cairo_move_to (cr, 0, 0);
+ cairo_scale (cr, 1.0, -1.0);
+
+ layout = pango_cairo_create_layout (cr);
+ pango_layout_set_font_description (layout, desc);
+ pango_layout_set_text (layout, string, -1);
+ if (horz_justify != 'l')
+ {
+ int width_pango;
+ double width;
+
+ pango_layout_get_size (layout, &width_pango, NULL);
+ width = (double) width_pango / PANGO_SCALE;
+ if (horz_justify == 'r')
+ cairo_rel_move_to (cr, -width, 0);
+ else
+ cairo_rel_move_to (cr, -width / 2.0, 0);
+ }
+ if (vert_justify != 't')
+ {
+ int height_pango;
+ double height;
+
+ pango_layout_get_size (layout, NULL, &height_pango);
+ height = (double) height_pango / PANGO_SCALE;
+ if (vert_justify == 'b' || vert_justify == 'x')
+ cairo_rel_move_to (cr, 0, -height);
+ else if (vert_justify == 'c')
+ cairo_rel_move_to (cr, 0, -height / 2.0);
+ }
+ pango_cairo_show_layout (cr, layout);
+ g_object_unref (layout);
-const char *const data_colour[] = {
- "brown",
- "red",
- "orange",
- "yellow",
- "green",
- "blue",
- "violet",
- "grey",
- "pink"
-};
+ cairo_restore (cr);
+ cairo_new_path (cr);
+ pango_font_description_free (desc);
+}
/* 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, ...)
+draw_tick (cairo_t *cr, const struct chart_geometry *geom,
+ enum tick_orientation orientation,
+ double position,
+ const char *label, ...)
{
const int tickSize = 10;
+ double x, y;
- assert(chart);
-
- pl_savestate_r(chart->lp);
+ cairo_move_to (cr, geom->data_left, geom->data_bottom);
- pl_move_r(chart->lp, chart->data_left, chart->data_bottom);
-
- if ( orientation == TICK_ABSCISSA )
- pl_flinerel_r(chart->lp, position, 0, position, -tickSize);
- else if (orientation == TICK_ORDINATE )
- pl_flinerel_r(chart->lp, 0, position, -tickSize, position);
+ if (orientation == TICK_ABSCISSA)
+ {
+ cairo_rel_move_to (cr, position, 0);
+ cairo_rel_line_to (cr, 0, -tickSize);
+ }
+ else if (orientation == TICK_ORDINATE)
+ {
+ cairo_rel_move_to (cr, 0, position);
+ cairo_rel_line_to (cr, -tickSize, 0);
+ }
else
NOT_REACHED ();
+ cairo_get_current_point (cr, &x, &y);
- if ( label ) {
- char buf[10];
- va_list ap;
- va_start(ap,label);
- vsnprintf(buf,10,label,ap);
-
- if ( orientation == TICK_ABSCISSA )
- pl_alabel_r(chart->lp, 'c','t', buf);
- else if (orientation == TICK_ORDINATE )
- {
- if ( fabs(position) < DBL_EPSILON )
- pl_moverel_r(chart->lp, 0, 10);
+ cairo_stroke (cr);
- pl_alabel_r(chart->lp, 'r','c', buf);
- }
-
- va_end(ap);
- }
-
- pl_restorestate_r(chart->lp);
+ if (label != NULL)
+ {
+ va_list ap;
+ char *s;
+
+ cairo_move_to (cr, x, y);
+
+ va_start (ap, label);
+ s = xvasprintf (label, ap);
+ if (orientation == TICK_ABSCISSA)
+ chart_label (cr, 'c', 't', s);
+ else if (orientation == TICK_ORDINATE)
+ {
+ if (fabs (position) < DBL_EPSILON)
+ cairo_rel_move_to (cr, 0, 10);
+ chart_label (cr, 'r', 'c', s);
+ }
+ free (s);
+ va_end (ap);
+ }
}
/* Write the title on a chart*/
void
-chart_write_title(struct chart *chart, const char *title, ...)
+chart_write_title (cairo_t *cr, const struct chart_geometry *geom,
+ const char *title, ...)
{
va_list ap;
- char buf[100];
+ char *s;
- if ( ! chart )
- return ;
+ cairo_save (cr);
+ // pl_ffontsize_r (cr, geom->font_size * 1.5); /* XXX */
+ cairo_move_to (cr, geom->data_left, geom->title_bottom);
- pl_savestate_r(chart->lp);
- pl_ffontsize_r(chart->lp,chart->font_size * 1.5);
- pl_move_r(chart->lp,chart->data_left, chart->title_bottom);
+ va_start(ap, title);
+ s = xvasprintf (title, ap);
+ chart_label (cr, 'l', 'x', s);
+ free (s);
+ va_end (ap);
- va_start(ap,title);
- vsnprintf(buf,100,title,ap);
- pl_alabel_r(chart->lp,0,0,buf);
- va_end(ap);
-
- pl_restorestate_r(chart->lp);
+ cairo_restore (cr);
}
/* Set the scale for the abscissa */
void
-chart_write_xscale(struct chart *ch, double min, double max, int ticks)
+chart_write_xscale (cairo_t *cr, struct chart_geometry *geom,
+ double min, double max, int ticks)
{
double x;
const double tick_interval =
- chart_rounded_tick( (max - min) / (double) ticks);
-
- assert ( ch );
-
-
- ch->x_max = ceil( max / tick_interval ) * tick_interval ;
- ch->x_min = floor ( min / tick_interval ) * tick_interval ;
+ chart_rounded_tick ((max - min) / (double) ticks);
+ geom->x_max = ceil (max / tick_interval) * tick_interval;
+ geom->x_min = floor (min / tick_interval) * tick_interval;
+ geom->abscissa_scale = fabs(geom->data_right - geom->data_left) /
+ fabs(geom->x_max - geom->x_min);
- ch->abscissa_scale = fabs(ch->data_right - ch->data_left) /
- fabs(ch->x_max - ch->x_min);
-
- for(x = ch->x_min ; x <= ch->x_max; x += tick_interval )
- {
- draw_tick (ch, TICK_ABSCISSA,
- (x - ch->x_min) * ch->abscissa_scale, "%g", x);
- }
-
+ for (x = geom->x_min; x <= geom->x_max; x += tick_interval)
+ draw_tick (cr, geom, TICK_ABSCISSA,
+ (x - geom->x_min) * geom->abscissa_scale, "%g", x);
}
/* Set the scale for the ordinate */
void
-chart_write_yscale(struct chart *ch, double smin, double smax, int ticks)
+chart_write_yscale (cairo_t *cr, struct chart_geometry *geom,
+ double smin, double smax, int ticks)
{
double y;
const double tick_interval =
- chart_rounded_tick( (smax - smin) / (double) ticks);
-
- if ( !ch )
- return;
+ chart_rounded_tick ((smax - smin) / (double) ticks);
- ch->y_max = ceil ( smax / tick_interval ) * tick_interval ;
- ch->y_min = floor ( smin / tick_interval ) * tick_interval ;
+ geom->y_max = ceil (smax / tick_interval) * tick_interval;
+ geom->y_min = floor (smin / tick_interval) * tick_interval;
- ch->ordinate_scale =
- fabs(ch->data_top - ch->data_bottom) / fabs(ch->y_max - ch->y_min) ;
+ geom->ordinate_scale =
+ (fabs (geom->data_top - geom->data_bottom)
+ / fabs (geom->y_max - geom->y_min));
- for(y = ch->y_min ; y <= ch->y_max; y += tick_interval )
- {
- draw_tick (ch, TICK_ORDINATE,
- (y - ch->y_min) * ch->ordinate_scale, "%g", y);
- }
+ for (y = geom->y_min; y <= geom->y_max; y += tick_interval)
+ draw_tick (cr, geom, TICK_ORDINATE,
+ (y - geom->y_min) * geom->ordinate_scale, "%g", y);
}
-
/* Write the abscissa label */
void
-chart_write_xlabel(struct chart *ch, const char *label)
+chart_write_xlabel (cairo_t *cr, const struct chart_geometry *geom,
+ const char *label)
{
- if ( ! ch )
- return ;
-
- pl_savestate_r(ch->lp);
-
- pl_move_r(ch->lp,ch->data_left, ch->abscissa_top);
- pl_alabel_r(ch->lp,0,'t',label);
-
- pl_restorestate_r(ch->lp);
-
+ cairo_move_to (cr, geom->data_left, geom->abscissa_top);
+ chart_label (cr, 'l', 't', label);
}
-
-
/* Write the ordinate label */
void
-chart_write_ylabel(struct chart *ch, const char *label)
+chart_write_ylabel (cairo_t *cr, const struct chart_geometry *geom,
+ const char *label)
{
- if ( ! ch )
- return ;
-
- pl_savestate_r(ch->lp);
-
- pl_move_r(ch->lp, ch->data_bottom, ch->ordinate_right);
- pl_textangle_r(ch->lp, 90);
- pl_alabel_r(ch->lp, 0, 0, label);
-
- pl_restorestate_r(ch->lp);
+ cairo_save (cr);
+ cairo_translate (cr, -geom->data_bottom, -geom->ordinate_right);
+ cairo_move_to (cr, 0, 0);
+ cairo_rotate (cr, M_PI / 2.0);
+ chart_label (cr, 'l', 'x', label);
+ cairo_restore (cr);
}
projects / pspp-builds.git / blobdiff