perf ui browser header: Provide feedback on unhandled hotkeys

Don't just eat unknown keys without providing visual feedback and
instructions on how to see which ones are assigned.

Suggested-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Ingo Molnar <mingo@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Ian Rogers <irogers@google.com>
Cc: James Clark <james.clark@linaro.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/r/Z_TYux5fUg2pW-pF@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/ui/browsers/header.c b/tools/perf/ui/browsers/header.c
index 57e6e4332f746053a1ca9b86aa0a4260a1e07a26..2213b46616002a04a0d47d7192e129e301d7fa29 100644 (file)
--- a/tools/perf/ui/browsers/header.c
+++ b/tools/perf/ui/browsers/header.c
@@ -69,6 +69,7 @@ static int list_menu__run(struct ui_browser *menu)
                        key = -1;
                        break;
                default:
+                       ui_browser__warn_unhandled_hotkey(menu, key, 0, ", use 'h'/'?'/F1 to see actions");
                        continue;
                }