Change plot routine to take a drawing_area as argument

Previously we passed in width and height and the routine itself decided to
keep 5% margin around each edge - oddly doing this with double precision,
even though this is all integer coordinates.

Instead we are now passing in a drawing_area. We are kind of abusing the
cairo_rectangle_int_t data type here - but it seemed silly to redefine a
new data type for this.
Width and height give the size of the TOTAL drawing area (as before).
x and y give the offset from the edges - so the EFFECTIVE drawing area is
width-2x and height-2y
This is in preparation for adding tooltips - those need to know the
coordinate offsets from the edges - so having this hard coded inside the
plot function didn't make sense anymore.

Signed-off-by: Dirk Hohndel <dirk@hohndel.org>

1 files changed, 2 insertions, 1 deletions

diff --git a/print.c b/print.c
index 36ceca67e..bdebcfe15 100644
--- a/print.c
+++ b/print.c
@@ -127,12 +127,13 @@ static void show_dive_text(struct dive *dive, cairo_t *cr, double w, double h, P
 
 static void show_dive_profile(struct dive *dive, cairo_t *cr, double w, double h)
 {
+	cairo_rectangle_int_t drawing_area = { w/20.0, h/20.0, w, h};
 	struct graphics_context gc = {
 		.printer = 1,
 		.cr = cr
 	};
 	cairo_save(cr);
-	plot(&gc, w, h, dive);
+	plot(&gc, &drawing_area, dive);
 	cairo_restore(cr);
 }