Draggable peeking/fullscreen launcher with transparent background.

ash/shelf/shelf.cc

 // Copyright 2016 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/shelf/shelf.h"
 
 #include "ash/public/cpp/config.h"
 #include "ash/public/cpp/shelf_item_delegate.h"
 #include "ash/public/cpp/shell_window_ids.h"
 #include "ash/root_window_controller.h"
 #include "ash/session/session_controller.h"
+#include "ash/shelf/app_list_button.h"
 #include "ash/shelf/shelf_bezel_event_handler.h"
 #include "ash/shelf/shelf_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_model.h"
 #include "ash/shelf/shelf_observer.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
 #include "base/logging.h"
 #include "base/memory/ptr_util.h"
+#include "ui/app_list/app_list_features.h"
 #include "ui/display/types/display_constants.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace ash {
 
 namespace {
 
 // A callback that does nothing after shelf item selection handling.
 void NoopCallback(ShelfAction,
                   base::Optional<std::vector<mojom::MenuItemPtr>>) {}
@@ skipping 29 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(AutoHideEventHandler);
 };
 
 // Shelf ---------------------------------------------------------------------
 
 Shelf::Shelf() : shelf_locking_manager_(this) {
   // TODO: ShelfBezelEventHandler needs to work with mus too.
   // http://crbug.com/636647
   if (Shell::GetAshConfig() != Config::MASH)
     bezel_event_handler_ = base::MakeUnique<ShelfBezelEventHandler>(this);
+  Shell::Get()->AddShellObserver(this);
 }
 
-Shelf::~Shelf() {}
+Shelf::~Shelf() {
+  Shell::Get()->RemoveShellObserver(this);
+}
 
 // static
 Shelf* Shelf::ForWindow(aura::Window* window) {
   return GetRootWindowController(window->GetRootWindow())->shelf();
 }
 
 // static
 bool Shelf::CanChangeShelfAlignment() {
   if (Shell::Get()->session_controller()->IsUserSupervised())
     return false;
@@ skipping 233 matching lines @@
 }
 
 ShelfLockingManager* Shelf::GetShelfLockingManagerForTesting() {
   return &shelf_locking_manager_;
 }
 
 ShelfView* Shelf::GetShelfViewForTesting() {
   return shelf_widget_->shelf_view_for_testing();
 }
 
+void Shelf::OnAppListIsActive() {
+  shelf_layout_manager()->OnAppListIsActive();
+}
+
 void Shelf::WillDeleteShelfLayoutManager() {
   if (Shell::GetAshConfig() == Config::MASH) {
     // TODO(sky): this should be removed once Shell is used everywhere.
     ShutdownShelfWidget();
   }
 
   // Clear event handlers that might forward events to the destroyed instance.
   auto_hide_event_handler_.reset();
   bezel_event_handler_.reset();
 
@@ skipping 20 matching lines @@
 }
 
 void Shelf::OnBackgroundUpdated(ShelfBackgroundType background_type,
                                 AnimationChangeType change_type) {
   if (background_type == GetBackgroundType())
     return;
   for (auto& observer : observers_)
     observer.OnBackgroundTypeChanged(background_type, change_type);
 }
 
+void Shelf::OnAppListShownOrDismissed(bool shown, aura::Window* root_window) {
+  // Check if the AppList was shown on this display.
+  if (shelf_widget() == Shelf::ForWindow(root_window)->shelf_widget()) {
+    if (shown) {
+      shelf_widget()->GetAppListButton()->OnAppListShown();
+    } else {
+      shelf_widget()->GetAppListButton()->OnAppListDismissed();
+    }
+    if (app_list::features::IsFullscreenAppListEnabled())
+      OnAppListIsActive();
+  }
+}
+
 }  // namespace ash