Touch gestures for System Tray/ IME/ Stylus/ Notifications

ash/system/tray/tray_background_view.h

Index: ash/system/tray/tray_background_view.h
diff --git a/ash/system/tray/tray_background_view.h b/ash/system/tray/tray_background_view.h
index 04294179742e0a3b4ec99b50e2853a6decbd3f9d..530d94fe2b6822c9ee393513b6a7168371d2a3ea 100644
--- a/ash/system/tray/tray_background_view.h
+++ b/ash/system/tray/tray_background_view.h
@@ -10,6 +10,7 @@
 #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"
@@ -27,7 +28,8 @@ class TrayEventFilter;
 // 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[];
 
@@ -43,9 +45,10 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
   // views::View:
   void SetVisible(bool visible) override;
   const char* GetClassName() const override;
-  void ChildPreferredSizeChanged(views::View* child) override;
-  void GetAccessibleNodeData(ui::AXNodeData* node_data) 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;
 
   // ActionableView:
   std::unique_ptr<views::InkDropRipple> CreateInkDropRipple() const override;
@@ -53,6 +56,18 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
       const override;
   void PaintButtonContents(gfx::Canvas* canvas) override;
 
+  // TrayBubbleView::Delegate:
+  bool ProcessGestureEventForBubble(ui::GestureEvent* event) override;
+
+  // Gets the associated tray bubble view.

[tdanderson, 2017/07/17 22:44:37]

nit: "Returns the associated tray bubble view, if one exists. Otherwise returns
nullptr."

[minch1, 2017/07/18 03:58:59]

Done.

+  virtual views::TrayBubbleView* GetBubbleView();
+

[tdanderson, 2017/07/17 22:44:36]

nit: "if it exists and is currently showing"

[minch1, 2017/07/18 03:58:59]

Done.

+  // Closes the associated tray bubble view if it is currently showing.
+  virtual void CloseBubble() {}

[tdanderson, 2017/07/17 22:44:37]

The no-op implementations of CloseBubble() and ShowBubble() should go in the
.cc, not here in the .h.

[minch1, 2017/07/18 03:58:59]

Done.

+
+  // Shows the associated tray bubble.

[tdanderson, 2017/07/17 22:44:37]

nit: "if one exists"

[minch1, 2017/07/18 03:58:59]

Done.

+  virtual void ShowBubble() {}
+
   // Called whenever the shelf alignment changes.
   virtual void UpdateAfterShelfAlignmentChange();
 
@@ -100,7 +115,11 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
   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:
@@ -145,6 +164,13 @@ class ASH_EXPORT TrayBackgroundView : public ActionableView,
   // 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_;