https://cs.chromium.org/chromium/src/ui/app_list/views/apps_grid_view.cc?l=77

Done with other p0 bugs, claim this one.

+sgabriel@chromium.org
Do we have a specs for this?

Current page flip zone size is 40px within the border of apps grid view. This works well on old launcher because apps grid view has visible border. But in new launcher the border is not visible. So users do not know where they should drag the app to trigger page switch.
One possible solution is to extend the page flip zone outside the apps grid view. It extends to the top of shelf if shelf exists or to the bottom of screen if no shelf exists, what do you think?

Recap of off-thread discussion before I deliver specs:

- keep 40px zone but increase it below the all apps, all the way to the shelf when possible. This zone should also cover the full width under the all apps container
- make hover time to change page from 1000ms to 500ms

Thanks, that sounds good.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c3835bfc99b6a110a5867175dd534063b703eb08

commit c3835bfc99b6a110a5867175dd534063b703eb08
Author: Weidong Guo <weidongg@chromium.org>
Date: Tue Aug 15 22:50:59 2017

cros: Make switching pages easier while dragging app

Changes:
1. Extend the page flip zone all the way to the top of shelf if shelf
exists or to the bottom of display if shelf does not exist.
2. Change page flip timer to 500ms.

BUG= 750660 

Change-Id: Ic458dcfb158b42e727c06037ac19006172dfa09b
Reviewed-on: https://chromium-review.googlesource.com/612699
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Cr-Commit-Position: refs/heads/master@{#494582}
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/app_list_view.cc
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/app_list_view.h
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/apps_grid_view.h
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/apps_grid_view_unittest.cc
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/test/apps_grid_view_test_api.cc
[modify] https://crrev.com/c3835bfc99b6a110a5867175dd534063b703eb08/ui/app_list/views/test/apps_grid_view_test_api.h

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/15d1debec760999b40659183bb2d4bece7afb31e

commit 15d1debec760999b40659183bb2d4bece7afb31e
Author: Vadim Tryshev <vadimt@google.com>
Date: Mon Aug 21 21:36:09 2017

cros: Make switching pages easier while dragging app

Changes:
1. Extend the page flip zone all the way to the top of shelf if shelf
exists or to the bottom of display if shelf does not exist.
2. Change page flip timer to 500ms.

BUG= 750660 
TBR=weidongg@chromium.org

(cherry picked from commit c3835bfc99b6a110a5867175dd534063b703eb08)

Change-Id: Ic458dcfb158b42e727c06037ac19006172dfa09b
Reviewed-on: https://chromium-review.googlesource.com/612699
Commit-Queue: Weidong Guo <weidongg@chromium.org>
Reviewed-by: Yury Khmel <khmel@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#494582}
Reviewed-on: https://chromium-review.googlesource.com/624800
Reviewed-by: Vadim Tryshev <vadimt@chromium.org>
Cr-Commit-Position: refs/branch-heads/3163@{#728}
Cr-Branched-From: ff259bab28b35d242e10186cd63af7ed404fae0d-refs/heads/master@{#488528}
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/app_list_view.cc
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/app_list_view.h
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/apps_grid_view.cc
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/apps_grid_view.h
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/apps_grid_view_unittest.cc
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/test/apps_grid_view_test_api.cc
[modify] https://crrev.com/15d1debec760999b40659183bb2d4bece7afb31e/ui/app_list/views/test/apps_grid_view_test_api.h