wip: Refactoring Ash's AppListController, moving the bulk of the logic to chrome/browser/ui/ash/app…

ash/wm/app_list_layout_delegate.h

+// 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.
+
+#ifndef ASH_WM_APP_LIST_LAYOUT_DELEGATE_H_
+#define ASH_WM_APP_LIST_LAYOUT_DELEGATE_H_
+
+#include "ash/ash_export.h"
+#include "ash/shelf/shelf_icon_observer.h"
+#include "ash/shell_observer.h"
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "ui/app_list/app_list_layout_delegate.h"
+#include "ui/events/event_handler.h"
+
+namespace app_list {
+class ApplicationDragAndDropHost;
+class AppListView;
+}
+
+namespace ui {
+class LocatedEvent;
+}
+
+namespace ash {
+namespace test {
+class AppListControllerTestApi;
+}
+
+// Responsible for laying out the app list UI as well as updating the Shelf
+// launch icon as the state of the app list changes. Listens to shell events
+// and touches/mouse clicks outside the app list to auto dismiss the UI or
+// update its layout as necessary.
+class ASH_EXPORT AppListLayoutDelegate : public app_list::AppListLayoutDelegate,
+                                         public ui::EventHandler,
+                                         public ShellObserver,
+                                         public ShelfIconObserver {
+ public:
+  AppListLayoutDelegate(app_list::AppListController* controller);
+  ~AppListLayoutDelegate() override;
+
+  // app_list::AppListController::LayoutDelegate:

[xiyuan, 2016/03/11 18:36:00]

nit: update

[mfomitchev, 2016/03/24 17:47:29]

Done.

+  void Init(app_list::AppListView* view,
+            aura::Window* root_window,
+            int current_apps_page) override;
+  void OnShown(aura::Window* root_window) override;
+  void OnDismissed() override;
+  void UpdateBounds() override;
+  gfx::Vector2d GetVisibilityAnimationOffset(
+      aura::Window* root_window) override;
+
+ private:
+  void ProcessLocatedEvent(ui::LocatedEvent* event);
+
+  // ui::EventHandler overrides:
+  void OnMouseEvent(ui::MouseEvent* event) override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+
+  // ShellObserver overrides:
+  void OnShelfAlignmentChanged(aura::Window* root_window) override;
+  void OnMaximizeModeStarted() override;
+  void OnMaximizeModeEnded() override;
+
+  // ShelfIconObserver overrides:
+  void OnShelfIconPositionsChanged() override;
+
+  // Whether the app list is visible (or in the process of being shown).
+  bool is_visible_;
+
+  // Whether the app list should remain centered.
+  bool is_centered_;
+
+  // Not owned. Pointer is guaranteed to be valid while this object is alive.
+  app_list::AppListController* controller_;
+
+  // The AppListView this class manages, owned by its widget.
+  app_list::AppListView* view_;
+
+  DISALLOW_COPY_AND_ASSIGN(AppListLayoutDelegate);
+};
+
+}  // namespace ash
+
+#endif  // ASH_WM_APP_LIST_LAYOUT_DELEGATE_H_