Draggable peeking/fullscreen launcher with transparent background.

ash/root_window_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/root_window_controller.h"
 
 #include <algorithm>
 #include <queue>
 #include <vector>
 
@@ skipping 890 matching lines @@
   default_container->SetProperty(kUsesScreenCoordinatesKey, true);
   wm::SetChildrenUseExtendedHitRegionForWindow(default_container);
 
   aura::Window* always_on_top_container =
       CreateContainer(kShellWindowId_AlwaysOnTopContainer,
                       "AlwaysOnTopContainer", non_lock_screen_containers);
   ::wm::SetChildWindowVisibilityChangesAnimated(always_on_top_container);
   wm::SetSnapsChildrenToPhysicalPixelBoundary(always_on_top_container);
   always_on_top_container->SetProperty(kUsesScreenCoordinatesKey, true);
 
+  aura::Window* app_list_container =
+      CreateContainer(kShellWindowId_AppListContainer, "AppListContainer",

[sky, 2017/05/31 15:04:17]

shell_window_ids is meant to contain the relative order of the containers.
Please update the file to indicate new position.

[newcomer, 2017/06/01 01:42:54]

Done.

+                      non_lock_screen_containers);
+  wm::SetSnapsChildrenToPhysicalPixelBoundary(app_list_container);
+  app_list_container->SetProperty(kUsesScreenCoordinatesKey, true);
+
   aura::Window* shelf_container =
       CreateContainer(kShellWindowId_ShelfContainer, "ShelfContainer",
                       non_lock_screen_containers);
   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_container);
   shelf_container->SetProperty(kUsesScreenCoordinatesKey, true);
   shelf_container->SetProperty(kLockedToRootKey, true);
 
   aura::Window* panel_container =
       CreateContainer(kShellWindowId_PanelContainer, "PanelContainer",
                       non_lock_screen_containers);
   wm::SetSnapsChildrenToPhysicalPixelBoundary(panel_container);
   panel_container->SetProperty(kUsesScreenCoordinatesKey, true);
 
   aura::Window* shelf_bubble_container =
       CreateContainer(kShellWindowId_ShelfBubbleContainer,
                       "ShelfBubbleContainer", non_lock_screen_containers);
   wm::SetSnapsChildrenToPhysicalPixelBoundary(shelf_bubble_container);
   shelf_bubble_container->SetProperty(kUsesScreenCoordinatesKey, true);
   shelf_bubble_container->SetProperty(kLockedToRootKey, true);
 
-  aura::Window* app_list_container =
-      CreateContainer(kShellWindowId_AppListContainer, "AppListContainer",
-                      non_lock_screen_containers);
-  wm::SetSnapsChildrenToPhysicalPixelBoundary(app_list_container);
-  app_list_container->SetProperty(kUsesScreenCoordinatesKey, true);
-
   aura::Window* modal_container =
       CreateContainer(kShellWindowId_SystemModalContainer,
                       "SystemModalContainer", non_lock_screen_containers);
   wm::SetSnapsChildrenToPhysicalPixelBoundary(modal_container);
   ::wm::SetChildWindowVisibilityChangesAnimated(modal_container);
   modal_container->SetProperty(kUsesScreenCoordinatesKey, true);
   wm::SetChildrenUseExtendedHitRegionForWindow(modal_container);
 
   // TODO(beng): Figure out if we can make this use
   // SystemModalContainerEventFilter instead of stops_event_propagation.
@@ skipping 135 matching lines @@
     EnableTouchHudProjection();
   else
     DisableTouchHudProjection();
 }
 
 RootWindowController* GetRootWindowController(const aura::Window* root_window) {
   return root_window ? GetRootWindowSettings(root_window)->controller : nullptr;
 }
 
 }  // namespace ash