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-rw-r--r--lib/et/src/et_wx_viewer.erl37
1 files changed, 21 insertions, 16 deletions
diff --git a/lib/et/src/et_wx_viewer.erl b/lib/et/src/et_wx_viewer.erl
index 4dd44e7a4c..041527fec4 100644
--- a/lib/et/src/et_wx_viewer.erl
+++ b/lib/et/src/et_wx_viewer.erl
@@ -793,8 +793,8 @@ handle_info(#wx{event = #wxScroll{type = scroll_changed}} = Wx, S) ->
N = round(S#state.n_events * Pos / Range),
Diff =
case N - event_pos(S) of
- D when D < 0 -> D - 1;
- D -> D + 1
+ D when D < 0 -> D;
+ D -> D
end,
S2 = scroll_changed(S, Diff),
noreply(S2);
@@ -1002,7 +1002,7 @@ scroll_changed(S, Expected) ->
scroll_first(S);
last ->
scroll_last(S)
- end;
+ end;
true ->
%% Down
OldPos = event_pos(S),
@@ -1018,19 +1018,24 @@ scroll_changed(S, Expected) ->
end.
jump_up(S, OldKey, OldPos, NewPos) ->
- Try = NewPos - OldPos,
+ Try = NewPos - OldPos -1,
Order = S#state.event_order,
- Fun = fun(Event, #e{pos = P}) when P >= NewPos ->
- Key = et_collector:make_key(Order, Event),
- #e{event = Event, key = Key, pos = P - 1};
- (_, Acc) ->
- Acc
- end,
- PrevE = et_collector:iterate(S#state.collector_pid,
- OldKey,
- Try,
- Fun,
- #e{key = OldKey, pos = OldPos}),
+ PrevE =
+ if NewPos =:= 0 ->
+ first;
+ true ->
+ Fun = fun(Event, #e{pos = P}) when P >= NewPos ->
+ Key = et_collector:make_key(Order, Event),
+ #e{event = Event, key = Key, pos = P - 1};
+ (_E, Acc) ->
+ Acc
+ end,
+ et_collector:iterate(S#state.collector_pid,
+ OldKey,
+ Try,
+ Fun,
+ #e{key = OldKey, pos = OldPos})
+ end,
case collect_more_events(S, PrevE, S#state.events_per_page) of
{_, []} ->
S;
@@ -2013,7 +2018,7 @@ update_scroll_bar(#state{scroll_bar = ScrollBar,
PixelsPerEvent = Range / EventsPerPage,
Share = EventsPerPage / N,
wxScrollBar:setScrollbar(ScrollBar,
- trunc(EventPos * Share * PixelsPerEvent),
+ trunc(EventPos * Share * PixelsPerEvent),
round(Share * Range),
Range,
round(Share * Range),