added src/, updated README.md

1 files changed, 94 insertions, 0 deletions

diff --git a/src/draw.c b/src/draw.c
new file mode 100644
index 0000000..51f9367
--- /dev/null
+++ b/src/draw.c
@@ -0,0 +1,94 @@
+#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[20];
+	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 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) {
+				snprintf(str, sizeof(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_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);
+}
+