const char *font;
};
+void graph_set_size(struct graph *g, unsigned int xdim, unsigned int ydim)
+{
+ g->xdim = xdim;
+ g->ydim = ydim;
+}
+
struct graph *graph_new(unsigned int xdim, unsigned int ydim, const char *font)
{
struct graph *g;
g = calloc(1, sizeof(*g));
- g->xdim = xdim;
- g->ydim = ydim;
+ graph_set_size(g, xdim, ydim);
g->per_label_limit = -1;
g->font = font;
if (!g->font)
}
}
-static void draw_centered_text(struct graph *g, cairo_t *cr, double x, double y,
- double fontsize, const char *text)
+static void draw_aligned_text(struct graph *g, cairo_t *cr, double x, double y,
+ double fontsize, const char *text, int alignment)
{
+#define CENTERED 0
+#define LEFT_JUSTIFIED 1
+#define RIGHT_JUSTIFIED 2
+
+ double factor, direction;
cairo_text_extents_t extents;
+ switch(alignment) {
+ case CENTERED:
+ direction = -1.0;
+ factor = 0.5;
+ break;
+ case RIGHT_JUSTIFIED:
+ direction = -1.0;
+ factor = 1.0;
+ break;
+ case LEFT_JUSTIFIED:
+ default:
+ direction = 1.0;
+ factor = 1.0;
+ break;
+ }
cairo_select_font_face (cr, g->font, CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, fontsize);
cairo_text_extents(cr, text, &extents);
- x = x - (extents.width / 2 + extents.x_bearing);
+ x = x + direction * (factor * extents.width + extents.x_bearing);
y = y - (extents.height / 2 + extents.y_bearing);
cairo_move_to(cr, x, y);
cairo_show_text(cr, text);
}
+static inline void draw_centered_text(struct graph *g, cairo_t *cr, double x, double y,
+ double fontsize, const char *text)
+{
+ draw_aligned_text(g, cr, x, y, fontsize, text, CENTERED);
+}
+
+static inline void draw_right_justified_text(struct graph *g, cairo_t *cr,
+ double x, double y,
+ double fontsize, const char *text)
+{
+ draw_aligned_text(g, cr, x, y, fontsize, text, RIGHT_JUSTIFIED);
+}
+
+static inline void draw_left_justified_text(struct graph *g, cairo_t *cr,
+ double x, double y,
+ double fontsize, const char *text)
+{
+ draw_aligned_text(g, cr, x, y, fontsize, text, LEFT_JUSTIFIED);
+}
+
static void draw_vertical_centered_text(struct graph *g, cairo_t *cr, double x,
double y, double fontsize,
const char *text)
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_set_line_width (cr, 0.8);
- /* for now just set margins at 10% of width. This is not very good. */
- *x1 = g->xdim / 10.0;
- *x2 = 9.0 * *x1;
- *y1 = g->ydim / 10.0;
- *y2 = 9.0 * *y1;
+ *x1 = 0.15 * g->xdim;
+ *x2 = 0.95 * g->xdim;
+ *y1 = 0.10 * g->ydim;
+ *y2 = 0.90 * g->ydim;
cairo_move_to(cr, *x1, *y1);
cairo_line_to(cr, *x1, *y2);
cairo_restore(cr);
/* draw tickmark label */
- draw_centered_text(g, cr, x1 - (x2 - x1) * 0.04, ty, 12.0, tm[i].string);
+ draw_right_justified_text(g, cr, x1 - (x2 - x1) * 0.025, ty, 12.0, tm[i].string);
cairo_stroke(cr);
}
}
double tmp, answer = 0.0;
struct graph_label *i;
struct graph_value *j;
+ int first = 1;
for (i = g->labels; i; i = i->next)
for (j = i->values; j; j = j->next) {
tmp = getvalue(j);
+ if (first) {
+ first = 0;
+ answer = tmp;
+ }
answer = cmp(tmp, answer);
}
return answer;