commit db6fcdd658240ead9e623af11f97a1172f03b07c
author Xiaodan Zhu <zxdan@chromium.org> Mon Mar 08 21:09:17 2021
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Mon Mar 08 21:09:17 2021
tree 82ae039060681775c30f92b8f0ed9bb65dd70154
parent 34fee31b80772949018a367f8a21bfa57fee93f5

Fix the behaviors when a desk is snapping back.

This CL fixs the wrong behaviors of dragging a desk while another
desk is snapping back.

The wrong behaviors are due to the old function call logic.

For mouse event, new logic is fixed as below:

- Add OnMousePressed in DeskPreviewView to call HandlePressEvent in
the DesksBarView.
- HandlePressEvent calls InitDragDesk to initialize a drag proxy.
- InitDragDesk ends current drag and estimate the initial offset for
the new drag but don't create the drag proxy widget.
- OnMouseDragged in DesksPreviewView calls HandleDragEvent in the
DesksBarView.
- HandleDragEvent calls StartDragDesk if drag proxy is initialized.
If the drag has already started, then call ContinueDragDesk.
- OnMouseReleased in DesksPreviewView calls HandleReleaseEvent in
DesksBarView.
- HandleReleaseEvent calls EndDragDesk if the drag is started.

For gesture event, the function call changes as follow:

- ET_GESTURE_LONG_PRESS in DesksPreviewView calls
HandleLongPressEvent in the DesksBarView to initialize and start
a drag.

Bug: 1181089
Change-Id: Ibfae484963523cd32971cb66e29416bf9b2ae159
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2730508
Commit-Queue: Xiaodan Zhu <zxdan@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Reviewed-by: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#860855}