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libsysprof-gtk: add a timecode label above the ruler

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This commit is contained in:
Christian Hergert
2023-07-05 11:31:39 -07:00
parent a2da225216
commit 5c0a56c47a
5 changed files with 142 additions and 32 deletions
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38
src/libsysprof-gtk/sysprof-time-ruler.c
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@ -279,3 +279,41 @@ sysprof_time_ruler_set_session (SysprofTimeRuler *self,
g_object_notify_by_pspec (G_OBJECT (self), properties[PROP_SESSION]);
}
}
char *
sysprof_time_ruler_get_label_at_point (SysprofTimeRuler *self,
double x)
{
char str[32];
const SysprofTimeSpan *visible;
gint64 duration;
gint64 o;
g_return_val_if_fail (SYSPROF_IS_TIME_RULER (self), NULL);
if (x < 0)
return NULL;
if (x > gtk_widget_get_width (GTK_WIDGET (self)))
return NULL;
if (self->session == NULL)
return NULL;
if (!(visible = sysprof_session_get_visible_time (self->session)) ||
!(duration = sysprof_time_span_duration (*visible)))
return NULL;
o = (x / (double)gtk_widget_get_width (GTK_WIDGET (self))) * duration;
if (o == 0)
g_snprintf (str, sizeof str, "%.3lfs", .0);
else if (o < 1000000)
g_snprintf (str, sizeof str, "%.3lfμs", o/1000.);
else if (o < SYSPROF_NSEC_PER_SEC)
g_snprintf (str, sizeof str, "%.3lfms", o/1000000.);
else
g_snprintf (str, sizeof str, "%.3lfs", o/(double)SYSPROF_NSEC_PER_SEC);
return g_strdup (str);
}