diff options
Diffstat (limited to 'profile.c')
| -rw-r--r-- | profile.c | 12 |
1 files changed, 12 insertions, 0 deletions
@@ -141,6 +141,15 @@ static const color_t profile_color[] = { #define SCALEY(gc,y) (((y)-gc->topy)/(gc->bottomy-gc->topy)*gc->maxy) #define SCALE(gc,x,y) SCALEX(gc,x),SCALEY(gc,y) +/* keep the last used gc around so we can invert the SCALEX calculation in + * order to calculate a time value for an x coordinate */ +static struct graphics_context last_gc; +int x_to_time(double x) +{ + int seconds = (x - last_gc.drawing_area.x) / last_gc.maxx * (last_gc.rightx - last_gc.leftx) + last_gc.leftx; + return (seconds > 0) ? seconds : 0; +} + static void move_to(struct graphics_context *gc, double x, double y) { cairo_move_to(gc->cr, SCALE(gc, x, y)); @@ -700,6 +709,9 @@ static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi gc->leftx = 0; gc->rightx = maxtime; gc->topy = 0; gc->bottomy = 1.0; + + last_gc = *gc; + set_source_rgba(gc, TIME_GRID); cairo_set_line_width_scaled(gc->cr, 2); |