Maybe we should make it opaque during dragging?

This sounds like a good solution to me.

Sammie, could you take a look at it?

Sorry to chime in late to this bug. Because the text is white and the background is transparent white, I don't see a simple solution with going opaque. I know that Sebastien wanted to change the visuals of overview (most likely creating floating labels above the previews, with no title bar). In the short term, the status quo is non-ideal, but probably ok.

The background is transparent white but its always against some blackish gray so its more closer to transparent black. The fix i made (which i will revert) was just to make it black on drag. My two cents.

+Sebastien in-case he has an opinion here.

sgabriel@ - I may have missed something, but i do not think the mocks cover this case right?

It is. Please refer to the motion spec.
https://mccanny.users.x20web.corp.google.com/www/splitscreen-motion/index.html

The changes are:

- Title bar are fully transparent
- You cannot grab the title bar anymore
- Only the thumbnail is draggable
- When the thumbnail is dragged, Title bar fades away
- When a thumbnail is dragged, all close button fade away

I see, a couple questions.

1) Can you still select the app by click and release the title?
2) Right now you can exit overview by clicking anywhere, will this be the case for the title?

Great points.

1) this sounds good, just disable drag
2) no, title are still a clickable area (no feedback however), as defined in #1

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/00dd90932cc0d14fba4eee67ac00357ae6a75228

commit 00dd90932cc0d14fba4eee67ac00357ae6a75228
Author: Sammie Quon <sammiequon@google.com>
Date: Tue Feb 06 20:03:20 2018

overview: Hide close button and title bar on overview item dragged.

Hide both for the item currently dragged. Only hide the close button for
the rest of the items.
Spec: https://mccanny.users.x20web.corp.google.com/www/splitscreen-motion/index.html
Window selection and deselection

Test: ash_unittests WindowSelectorTest.WindowItemTitleCloseVisibilityOnDrag
Bug: 782320,  775655 
Change-Id: I7e06a0154a9afdb391966109517b1aed419083e4
Reviewed-on: https://chromium-review.googlesource.com/893212
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Cr-Commit-Position: refs/heads/master@{#534764}
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_grid.cc
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_grid.h
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_selector.cc
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_selector_item.cc
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_selector_item.h
[modify] https://crrev.com/00dd90932cc0d14fba4eee67ac00357ae6a75228/ash/wm/overview/window_selector_unittest.cc

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/cbc21da64b686ca3f460fdb58d00c32846688ada

commit cbc21da64b686ca3f460fdb58d00c32846688ada
Author: Sammie Quon <sammiequon@google.com>
Date: Thu Feb 22 01:37:31 2018

overview: Disable drag for taps on title bar.

Do not allow dragging/snapping window if the tap event originated on the
overview item title. Press and release still will open the associated
window.

Also fix a bug with title bar not reshowing after long press. And remove
a unneeded function parameter.

Test: SplitViewWindowSelectorTest.EventsOnOverviewTitleBar
Bug:  775655 
Change-Id: Ie1339a88374f1e03f7c3362f8bf531c197db9c80
Reviewed-on: https://chromium-review.googlesource.com/911849
Commit-Queue: Sammie Quon <sammiequon@chromium.org>
Reviewed-by: Xiaoqian Dai <xdai@chromium.org>
Reviewed-by: Mitsuru Oshima <oshima@chromium.org>
Cr-Commit-Position: refs/heads/master@{#538302}
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_grid.cc
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_grid.h
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_selector.cc
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_selector_item.cc
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_selector_item.h
[modify] https://crrev.com/cbc21da64b686ca3f460fdb58d00c32846688ada/ash/wm/overview/window_selector_unittest.cc