Touch gestures for System Tray/ IME/ Stylus/ Notifications

ash/system/tray/tray_background_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 ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 #define ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_
 
 #include <memory>
 
 #include "ash/ash_export.h"
 #include "ash/shelf/shelf_background_animator_observer.h"
 #include "ash/system/tray/actionable_view.h"
+#include "ash/system/tray_drag_controller.h"
 #include "base/macros.h"
 #include "ui/compositor/layer_animation_observer.h"
 #include "ui/gfx/geometry/insets.h"
 #include "ui/views/bubble/tray_bubble_view.h"
 
 namespace ash {
 class Shelf;
 class TrayBackground;
 class TrayContainer;
 class TrayEventFilter;
 
 // Base class for some children of StatusAreaWidget. This class handles setting
 // and animating the background when the Launcher is shown/hidden. It also
 // inherits from ActionableView so that the tray items can override
 // PerformAction when clicked on.
 class ASH_EXPORT TrayBackgroundView : public ActionableView,
                                       public ui::ImplicitAnimationObserver,
-                                      public ShelfBackgroundAnimatorObserver {
+                                      public ShelfBackgroundAnimatorObserver,
+                                      public views::TrayBubbleView::Delegate {
  public:
   static const char kViewClassName[];
 
   explicit TrayBackgroundView(Shelf* shelf);
   ~TrayBackgroundView() override;
 
   // Called after the tray has been added to the widget containing it.
   virtual void Initialize();
 
   // Initializes animations for the bubble.
   static void InitializeBubbleAnimations(views::Widget* bubble_widget);
 
   // views::View:
   void SetVisible(bool visible) override;
   const char* GetClassName() const override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
+  void AboutToRequestFocusFromTabTraversal(bool reverse) override;
+  void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
   void ChildPreferredSizeChanged(views::View* child) override;
-  void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
-  void AboutToRequestFocusFromTabTraversal(bool reverse) override;
 
   // ActionableView:
   std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
   std::unique_ptr<views::InkDropHighlight> CreateInkDropHighlight()
       const override;
   void PaintButtonContents(gfx::Canvas* canvas) override;
 
+  // TrayBubbleView::Delegate:
+  void ProcessGestureEventForBubble(ui::GestureEvent* event) override;
+
+  // Returns the associated tray bubble view, if one exists. Otherwise returns
+  // nullptr.
+  virtual views::TrayBubbleView* GetBubbleView();
+
+  // Closes the associated tray bubble view if it exists and is currently
+  // showing.
+  virtual void CloseBubble();
+
+  // Shows the associated tray bubble if one exists.
+  virtual void ShowBubble();
+
   // Called whenever the shelf alignment changes.
   virtual void UpdateAfterShelfAlignmentChange();
 
   // Called when the anchor (tray or bubble) may have moved or changed.
-  virtual void AnchorUpdated() {}
+  virtual void AnchorUpdated();
 
   // Called from GetAccessibleNodeData, must return a valid accessible name.
   virtual base::string16 GetAccessibleNameForTray() = 0;
 
   // Called when the bubble is resized.
-  virtual void BubbleResized(const views::TrayBubbleView* bubble_view) {}
+  virtual void BubbleResized(const views::TrayBubbleView* bubble_view);
 
   // Hides the bubble associated with |bubble_view|. Called when the widget
   // is closed.
   virtual void HideBubbleWithView(const views::TrayBubbleView* bubble_view) = 0;
 
   // Called by the bubble wrapper when a click event occurs outside the bubble.
   // May close the bubble.
   virtual void ClickedOutsideBubble() = 0;
 
   // Returns the bubble anchor alignment based on |shelf_alignment_|.
@@ skipping 16 matching lines @@
   void set_separator_visibility(bool visible) { separator_visible_ = visible; }
 
   // Gets the anchor for bubbles, which is tray_container().
   views::View* GetBubbleAnchor() const;
 
   // Gets additional insets for positioning bubbles relative to
   // tray_container().
   gfx::Insets GetBubbleAnchorInsets() const;
 
   // Returns the container window for the bubble (on the proper display).
-  aura::Window* GetBubbleWindowContainer() const;
+  aura::Window* GetBubbleWindowContainer();
+
+  // Update the bounds of the associated tray bubble. Close the bubble if
+  // |close_bubble| is set.
+  void AnimateToTargetBounds(const gfx::Rect& target_bounds, bool close_bubble);
 
  protected:
   // ActionableView:
   std::unique_ptr<views::InkDropMask> CreateInkDropMask() const override;
   bool ShouldEnterPushedState(const ui::Event& event) override;
   bool PerformAction(const ui::Event& event) override;
   void HandlePerformActionResult(bool action_performed,
                                  const ui::Event& event) override;
 
+  TrayDragController* drag_controller() { return drag_controller_.get(); }
+  void set_drag_controller(
+      std::unique_ptr<TrayDragController> drag_controller) {
+    drag_controller_ = std::move(drag_controller);
+  }
+
  private:
   class TrayWidgetObserver;
 
   // ui::ImplicitAnimationObserver:
   void OnImplicitAnimationsCompleted() override;
   bool RequiresNotificationWhenAnimatorDestroyed() const override;
 
   // Applies transformations to the |layer()| to animate the view when
   // SetVisible(false) is called.
   void HideTransformation();
@@ skipping 15 matching lines @@
   TrayBackground* background_;
 
   // Determines if the view is active. This changes how  the ink drop ripples
   // behave.
   bool is_active_;
 
   // Visibility of this tray's separator which is a line of 1x32px and 4px to
   // right of tray.
   bool separator_visible_;
 
+  // Handles touch drag gestures on the tray area and its associated bubble.
+  std::unique_ptr<TrayDragController> drag_controller_;
+
+  // Used in maximize mode to make sure the system tray bubble only be shown in
+  // work area.
+  std::unique_ptr<aura::Window> clipping_window_;
+
   std::unique_ptr<TrayWidgetObserver> widget_observer_;
   std::unique_ptr<TrayEventFilter> tray_event_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBackgroundView);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_BACKGROUND_VIEW_H_