diff options
Diffstat (limited to 'profile.c')
| -rw-r--r-- | profile.c | 37 |
1 files changed, 33 insertions, 4 deletions
@@ -254,9 +254,8 @@ static void plot_text(struct graphics_context *gc, const text_render_options_t * cairo_set_font_size(cr, tro->size * plot_scale); cairo_font_extents(cr, &fe); cairo_text_extents(cr, buffer, &extents); - dx = tro->hpos * extents.width + extents.x_bearing; - dy = tro->vpos * extents.height + fe.descent; - + dx = tro->hpos * (extents.width + extents.x_bearing); + dy = tro->vpos * (extents.height + fe.descent); move_to(gc, x, y); cairo_rel_move_to(cr, dx, dy); @@ -463,6 +462,26 @@ static void plot_minmax_profile(struct graphics_context *gc, struct plot_info *p plot_minmax_profile_minute(gc, pi, 0); } +static void plot_depth_scale(struct graphics_context *gc, struct plot_info *pi) +{ + int i, maxdepth, marker; + static const text_render_options_t tro = {10, SAMPLE_DEEP, RIGHT, MIDDLE}; + + /* Depth markers: every 30 ft or 10 m*/ + maxdepth = get_maxdepth(pi); + gc->topy = 0; gc->bottomy = maxdepth; + + switch (output_units.length) { + case METERS: marker = 10000; break; + case FEET: marker = 9144; break; /* 30 ft */ + } + set_source_rgba(gc, DEPTH_GRID); + for (i = marker; i < maxdepth; i += marker) { + double d = get_depth_units(i, NULL, NULL); + plot_text(gc, &tro, -0.002, i, "%.0f", d); + } +} + static void plot_depth_profile(struct graphics_context *gc, struct plot_info *pi) { int i, incr; @@ -1423,13 +1442,14 @@ void plot(struct graphics_context *gc, cairo_rectangle_t *drawing_area, struct d pi = create_plot_info(dive, nr, sample); + /* shift the drawing area so we have a nice margin around it */ cairo_translate(gc->cr, drawing_area->x, drawing_area->y); cairo_set_line_width_scaled(gc->cr, 1); cairo_set_line_cap(gc->cr, CAIRO_LINE_CAP_ROUND); cairo_set_line_join(gc->cr, CAIRO_LINE_JOIN_ROUND); /* - * We can use "cairo_translate()" because that doesn't + * We don't use "cairo_translate()" because that doesn't * scale line width etc. But the actual scaling we need * do set up ourselves.. * @@ -1466,5 +1486,14 @@ void plot(struct graphics_context *gc, cairo_rectangle_t *drawing_area, struct d cairo_close_path(gc->cr); cairo_stroke(gc->cr); + /* now shift the translation back by half the margin; + * this way we can draw the vertical scales on both sides */ + cairo_translate(gc->cr, -drawing_area->x / 2.0, 0); + gc->maxx += drawing_area->x; + gc->leftx = -(drawing_area->x / drawing_area->width) / 2.0; + gc->rightx = 1.0 - gc->leftx; + + plot_depth_scale(gc, pi); + free(pi); } |