tree a28f0a8126804555345a0f0bfb1914ac48053caa
parent 122834484af3d2f68b0ee0320d0e9e08e4d59bad
author Hector Dearman <hjd@google.com> 1611598440 +0000
committer Hector Dearman <hjd@google.com> 1611598440 +0000

ui: Add 100ns margin to both sides of trace

The first and last events in the trace are often hard to click on since
scrolling is bound by these timestamps. This issue is especially bad
when the trace contains a handful of events (as is often the case with
heap profiles) since the user is more likely to want to click on an
'edge' event.

This introduces a fixed time margin to both ends of the trace allowing
the user to zoom in a select 'edge' events.

Bug: 178383244
Change-Id: I7ef7aa9f77cd0d0c6c80117b8bdd69666277740e