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#include <stdio.h>
#include <cairo/cairo.h>
struct dimensions {
double pw; /* paper width */
double ph; /* paper height */
double mw; /* month width */
double mh; /* month height */
double bw; /* day box width */
double bh; /* day box height */
double r; /* rows */
double c; /* columns */
double m; /* margin */
};
int draw_calendar(cairo_t *c, double x, double y, struct dimensions d) {
double x1, y1, x2, y2;
x1 = x;
y1 = y;
x2 = d.pw - x1; /* Set the line endpoint to right side of the page */
for (int i = 0; i < d.r + 1; i++) { /* Draw Horizontal Lines */
cairo_move_to (c, x, y);
cairo_line_to (c, x2, y);
y = y + d.bh;
}
x = x1;
y = y1;
y2 = y1 + d.mh; /* Set the line endpoint as the bottom of the month */
for (int i = 0; i < d.c + 1; i++) { /* Draw Vertical Lines */
cairo_move_to (c, x, y);
cairo_line_to (c, x, y2);
x = x + d.bw;
}
cairo_stroke(c);
return(0);
}
int draw_numbers(cairo_t *c, double x, double y, struct dimensions d, int wd, int nd) {
char str[3];
cairo_text_extents_t te;
cairo_font_extents_t fe;
cairo_select_font_face (c, "sans-serif",
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size (c, d.bw / 2);
int iterative = 0;
cairo_font_extents (c, &fe);
double yi = y;
double xi = x;
int current_weekday = wd;
x = d.m + (wd * d.bw);
for (int j = 0; j < d.r; j++) {
y = y + d.bh - ((d.bh - fe.ascent) / 2);
for (int k = current_weekday; k < d.c; k++) {
if (iterative < nd) {
sprintf(str, "%d", iterative + 1);
cairo_text_extents (c, str, &te);
double box_margins = (d.bw - te.width) / 2;
cairo_move_to(c, x + box_margins - te.x_bearing, y); /* center the number within the box */
cairo_show_text(c, str);
cairo_move_to(c, x, y); /* Sort of backtrack to realign with the spacing of the boxes */
x = x + d.bw;
iterative++;
current_weekday++;
}
}
current_weekday = 0;
y = y - (d.bh - ((d.bh - fe.ascent) / 2));
y = y + d.bh;
x = xi;
}
return(0);
}
int draw_month_name(cairo_t *c, char *name, struct dimensions d) {
double x, y = d.m;
cairo_set_font_size(c, 1.0);
cairo_text_extents_t te;
cairo_font_extents_t fe;
cairo_text_extents(c, name, &te);
x = (d.pw / 2) - (te.width / 2);
y = 1.5;
cairo_move_to(c, x, y);
cairo_show_text(c, &name[0]);
return(0);
}
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