linux-kernel - Re: [PATCH v2 3/3] perf hists browser: Reset selection when refresh

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Date:	Fri, 4 Dec 2015 21:57:32 +0900
From:	Namhyung Kim <namhyung@...nel.org>
To:	Wang Nan <wangnan0@...wei.com>
Cc:	acme@...hat.com, acme@...nel.org, linux-kernel@...r.kernel.org,
	pi3orama@....com, lizefan@...wei.com
Subject: Re: [PATCH v2 3/3] perf hists browser: Reset selection when refresh

On Thu, Dec 03, 2015 at 03:08:15AM +0000, Wang Nan wrote:
> With following steps:
> 
>  Step 1: perf report
> 
>  Step 2: Use UP/DOWN to select an entry, don't press 'ENTER'
> 
>  Step 3: Use '/' to filter symbols, use a filter which returns
>          empty result
> 
>  Step 4: Press 'ENTER'
> 
> We see that, even if we have filter all symbols (and the main interface
> is empty), pressing 'ENTER' still select one symbol. This behavior
> surprise user. This patch resets browser->{he_,}selection in
> hist_browser__refresh() and let it choose default selection. In this
> case browser->{he_,}selection keeps NULL so user won't see annotation item
> in menu.
> 
> Signed-off-by: Wang Nan <wangnan0@...wei.com>
> Cc: Arnaldo Carvalho de Melo <acme@...hat.com>

Acked-by: Namhyung Kim <namhyung@...nel.org>

Thanks,
Namhyung


> ---
>  tools/perf/ui/browsers/hists.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/tools/perf/ui/browsers/hists.c b/tools/perf/ui/browsers/hists.c
> index 7447515..d555ba9 100644
> --- a/tools/perf/ui/browsers/hists.c
> +++ b/tools/perf/ui/browsers/hists.c
> @@ -1192,6 +1192,8 @@ static unsigned int hist_browser__refresh(struct ui_browser *browser)
>  	}
>  
>  	ui_browser__hists_init_top(browser);
> +	hb->he_selection = NULL;
> +	hb->selection = NULL;
>  
>  	for (nd = browser->top; nd; nd = rb_next(nd)) {
>  		struct hist_entry *h = rb_entry(nd, struct hist_entry, rb_node);
> -- 
> 1.8.3.4
> 
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