mash: Close system tray bubble on click outside its bounds, part 1

ui/views/widget/root_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_WIDGET_ROOT_VIEW_H_
 #define UI_VIEWS_WIDGET_ROOT_VIEW_H_
 
 #include <string>
 
 #include "base/macros.h"
@@ skipping 141 matching lines @@
 
   // |view| is the view receiving |event|. This function sends the event to all
   // the Views up the hierarchy that has |notify_enter_exit_on_child_| flag
   // turned on, but does not contain |sibling|.
   ui::EventDispatchDetails NotifyEnterExitOfDescendant(
       const ui::MouseEvent& event,
       ui::EventType type,
       View* view,
       View* sibling) WARN_UNUSED_RESULT;
 
+  // Specialized version of SetMouseHandler(). If |clear_on_release| is true the
+  // mouse handler will be cleared on mouse release, which is the common case
+  // and used for drags. If |clear_on_release| is false then the mouse handler
+  // must be explicitly by calling SetMouseHandler() with null.

[msw, 2016/04/11 16:52:20]

nit: 'explicitly released'

+  void SetMouseHandler(View* view, bool clear_on_release);
+
   // Overridden from ui::EventDispatcherDelegate:
   bool CanDispatchToTarget(ui::EventTarget* target) override;
   ui::EventDispatchDetails PreDispatchEvent(ui::EventTarget* target,
                                             ui::Event* event) override;
   ui::EventDispatchDetails PostDispatchEvent(ui::EventTarget* target,
                                              const ui::Event& event) override;
 
   //////////////////////////////////////////////////////////////////////////////
   // Tree operations -----------------------------------------------------------
 
   // The host Widget
   Widget* widget_;
 
   // Input ---------------------------------------------------------------------
 
   // TODO(tdanderson): Consider moving the input-related members into
   //                   ViewTargeter / RootViewTargeter.
 
   // The view currently handing down - drag - up
   View* mouse_pressed_handler_;
 
   // The view currently handling enter / exit
   View* mouse_move_handler_;
 
   // The last view to handle a mouse click, so that we can determine if
   // a double-click lands on the same view as its single-click part.
   View* last_click_handler_;
 
-  // true if mouse_pressed_handler_ has been explicitly set
+  // True if mouse_pressed_handler_ has been explicitly set.
   bool explicit_mouse_handler_;
 
+  // True if mouse_pressed_handler_ should be automatically cleared on mouse
+  // release, as is common during drags.
+  bool clear_mouse_handler_on_release_;
+
   // Last position/flag of a mouse press/drag. Used if capture stops and we need
   // to synthesize a release.
   int last_mouse_event_flags_;
   int last_mouse_event_x_;
   int last_mouse_event_y_;
 
   // The View currently handling gesture events.
   View* gesture_handler_;
 
   // Used to indicate if the |gesture_handler_| member was set prior to the
@@ skipping 30 matching lines @@
   // Tracks drag state for a view.
   View::DragInfo drag_info_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(RootView);
 };
 
 }  // namespace internal
 }  // namespace views
 
 #endif  // UI_VIEWS_WIDGET_ROOT_VIEW_H_