Touch gestures for System Tray/ IME/ Stylus/ Notifications

ui/views/bubble/tray_bubble_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_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
 #define UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_
 
 #include <memory>
 
 #include "base/macros.h"
@@ skipping 67 matching lines @@
 
     // Should return true if extra keyboard accessibility is enabled.
     // TrayBubbleView will put focus on the default item if extra keyboard
     // accessibility is enabled.
     virtual bool ShouldEnableExtraKeyboardAccessibility() = 0;
 
     // Called when a bubble wants to hide/destroy itself (e.g. last visible
     // child view was closed).
     virtual void HideBubble(const TrayBubbleView* bubble_view) = 0;
 
+    // Called when a bubble wants to be dragged (e.g. opened system tray bubble
+    // can be dragged downward to close).
+    virtual bool ProcessGestureEventOnBubbleView(ui::GestureEvent* event,
+                                                 View* target);
+
    private:
     DISALLOW_COPY_AND_ASSIGN(Delegate);
   };
 
   struct VIEWS_EXPORT InitParams {
     InitParams();
     InitParams(const InitParams& other);
     Delegate* delegate = nullptr;
     gfx::NativeWindow parent_window = nullptr;
     View* anchor_view = nullptr;
@@ skipping 53 matching lines @@
                                 Widget* bubble_widget) const override;
   void OnWidgetClosing(Widget* widget) override;
 
   // Overridden from views::View.
   gfx::Size CalculatePreferredSize() const override;
   gfx::Size GetMaximumSize() const override;
   int GetHeightForWidth(int width) const override;
   void OnMouseEntered(const ui::MouseEvent& event) override;
   void OnMouseExited(const ui::MouseEvent& event) override;
   void GetAccessibleNodeData(ui::AXNodeData* node_data) override;
+  void OnGestureEvent(ui::GestureEvent* event) override;
 
   // Overridden from MouseWatcherListener
   void MouseMovedOutOfHost() override;
 
   // Overridden from ui::AcceleratorTarget
   bool AcceleratorPressed(const ui::Accelerator& accelerator) override;
 
  protected:
   // Overridden from views::BubbleDialogDelegateView.
   int GetDialogButtons() const override;
@@ skipping 28 matching lines @@
 
   // Used to find any mouse movements.
   std::unique_ptr<MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayBubbleView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_BUBBLE_TRAY_BUBBLE_VIEW_H_