perf ui browser: Add ui_browser__show counterpart: __hide

So that the common tasks of providing a helpline at __run entry and
destroying the window and releasing resourses at exit can be abstracted
away, reducing a bit more the coupling with libnewt.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
LKML-Reference: <new-submission>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 4 insertions, 1 deletions

diff --git a/tools/perf/util/ui/browsers/hists.c b/tools/perf/util/ui/browsers/hists.c
index cee7998f1c33..dd512b73b015 100644
--- a/tools/perf/util/ui/browsers/hists.c
+++ b/tools/perf/util/ui/browsers/hists.c
@@ -211,7 +211,8 @@ static int hist_browser__run(struct hist_browser *self, const char *title,
                  nr_events, unit);
         newtDrawRootText(0, 0, str);
 
-        if (ui_browser__show(&self->b, title) < 0)
+        if (ui_browser__show(&self->b, title,
+                             "Press '?' for help on key bindings") < 0)
                 return -1;
 
         newtFormAddHotKey(self->b.form, 'A');
@@ -253,6 +254,8 @@ static int hist_browser__run(struct hist_browser *self, const char *title,
                         return 0;
                 }
         }
+
+        ui_browser__hide(&self->b);
         return 0;
 }