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Change plot routine to take a drawing_area as argument

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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>
This commit is contained in:
Dirk Hohndel 2011-10-04 12:14:26 -07:00
parent d7e35c512c
commit b72ade0e78
4 changed files with 15 additions and 14 deletions
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3
print.c
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@ -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);
}