ChromeOS: Keep app list centered when the display rotates by 90 degrees.

ui/app_list/views/app_list_view.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 UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 #define UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "ui/app_list/app_list_export.h"
 #include "ui/app_list/app_list_view_delegate_observer.h"
 #include "ui/app_list/speech_ui_model_observer.h"
 #include "ui/views/bubble/bubble_delegate.h"
 #include "ui/views/widget/widget.h"
 
 namespace base {
 class FilePath;
 }
 
+namespace gfx {
+class Screen;
+}
+
 namespace app_list {
 class ApplicationDragAndDropHost;
 class AppListMainView;
 class AppListModel;
 class AppListViewDelegate;
 class AppListViewObserver;
 class HideViewAnimationObserver;
 class PaginationModel;
 class SigninDelegate;
 class SigninView;
@@ skipping 20 matching lines @@
                                     bool border_accepts_events);
 
   // Initializes the widget and use a fixed |anchor_point_in_screen| for
   // positioning.
   void InitAsBubbleAtFixedLocation(gfx::NativeView parent,
                                    PaginationModel* pagination_model,
                                    const gfx::Point& anchor_point_in_screen,
                                    views::BubbleBorder::Arrow arrow,
                                    bool border_accepts_events);
 
+  // Initializes the widget and use the center of the primary display for
+  // positioning.
+  void InitAsBubbleCenteredOnPrimaryDisplay(
+      gfx::NativeView parent,
+      PaginationModel* pagination_model,
+      gfx::Screen* screen_to_keep_centered_on,
+      views::BubbleBorder::Arrow arrow,
+      bool border_accepts_events);
+
   void SetBubbleArrow(views::BubbleBorder::Arrow arrow);
 
   void SetAnchorPoint(const gfx::Point& anchor_point);
 
   // If |drag_and_drop_host| is not NULL it will be called upon drag and drop
   // operations outside the application list. This has to be called after
   // InitAsBubble was called since the app list object needs to exist so that
   // it can set the host.
   void SetDragAndDropHostOfCurrentAppList(
       ApplicationDragAndDropHost* drag_and_drop_host);
@@ skipping 33 matching lines @@
 
   AppListMainView* app_list_main_view() { return app_list_main_view_; }
 
  private:
   void InitAsBubbleInternal(gfx::NativeView parent,
                             PaginationModel* pagination_model,
                             views::BubbleBorder::Arrow arrow,
                             bool border_accepts_events,
                             const gfx::Vector2d& anchor_offset);
 
+  // Gets the point at the center of the current screen.
+  // |screen_to_keep_centered_on_| must not be NULL.
+  gfx::Point GetCenterPoint();
+
   // Overridden from views::BubbleDelegateView:
   virtual void OnBeforeBubbleWidgetInit(
       views::Widget::InitParams* params,
       views::Widget* widget) const OVERRIDE;
 
   // Overridden from views::WidgetDelegateView:
   virtual views::View* GetInitiallyFocusedView() OVERRIDE;
   virtual gfx::ImageSkia GetWindowIcon() OVERRIDE;
   virtual bool WidgetHasHitTestMask() const OVERRIDE;
   virtual void GetWidgetHitTestMask(gfx::Path* mask) const OVERRIDE;
@@ skipping 18 matching lines @@
 
   scoped_ptr<AppListViewDelegate> delegate_;
 
   AppListMainView* app_list_main_view_;
   SigninView* signin_view_;
   SpeechView* speech_view_;
 
   ObserverList<AppListViewObserver> observers_;
   scoped_ptr<HideViewAnimationObserver> animation_observer_;
 
+  // If non-NULL, the app list will remain centered on this screen's primary
+  // display.
+  gfx::Screen* screen_to_keep_centered_on_;
+
   DISALLOW_COPY_AND_ASSIGN(AppListView);
 };
 
 }  // namespace app_list
 
 #endif  // UI_APP_LIST_VIEWS_APP_LIST_VIEW_H_