Improve the logic for hiding the multi-window resize handle

ash/wm/workspace/multi_window_resize_controller.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_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
 #define ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_
 
 #include <vector>
 
 #include "ash/ash_export.h"
@@ skipping 69 matching lines @@
     Direction direction;
 
     // Windows after |window2| that are to be resized. Determined at the time
     // the resize starts.
     std::vector<aura::Window*> other_windows;
   };
 
   class ResizeMouseWatcherHost;
   class ResizeView;
 
+  void CreateMouseWatcher();
+
   // Returns a ResizeWindows based on the specified arguments. Use is_valid()
   // to test if the return value is a valid multi window resize location.
   ResizeWindows DetermineWindows(aura::Window* window,
                                  int window_component,
                                  const gfx::Point& point) const;
 
   // Variant of DetermineWindows() that uses the current location of the mouse
   // to determine the resize windows.
   ResizeWindows DetermineWindowsFromScreenPoint(aura::Window* window) const;
 
   // Finds a window by edge (one of the constants HitTestCompat.
   aura::Window* FindWindowByEdge(aura::Window* window_to_ignore,
                                  int edge_want,
                                  int x,
                                  int y) const;
 
   // Returns the first window touching |window|.
   aura::Window* FindWindowTouching(aura::Window* window,
                                    Direction direction) const;
 
   // Places any windows touching |start| into |others|.
   void FindWindowsTouching(aura::Window* start,
                            Direction direction,
                            std::vector<aura::Window*>* others) const;
 
-  // Hides the window after a delay.
-  void DelayedHide();
-
   // Shows the resizer if the mouse is still at a valid location. This is called
   // from the |show_timer_|.
   void ShowIfValidMouseLocation();
 
   // Shows the widget immediately.
   void ShowNow();
 
   // Returns true if the widget is showing.
   bool IsShowing() const;
 
@@ skipping 10 matching lines @@
   void CancelResize();
 
   // Returns the bounds for the resize widget.
   gfx::Rect CalculateResizeWidgetBounds(
       const gfx::Point& location_in_parent) const;
 
   // Returns true if |location_in_screen| is over the resize windows
   // (or the resize widget itself).
   bool IsOverWindows(const gfx::Point& location_in_screen) const;
 
-  // Returns true if |location_in_screen| is over |window|.
-  bool IsOverWindow(aura::Window* window,
-                    const gfx::Point& location_in_screen,
-                    int component) const;
+  // Returns true if |location_in_screen| is over |component| in |window|.
+  bool IsOverComponent(aura::Window* window,
+                       const gfx::Point& location_in_screen,
+                       int component) const;
 
   // Windows and direction to resize.
   ResizeWindows windows_;
 
-  // Timer before hiding.
-  base::OneShotTimer<MultiWindowResizeController> hide_timer_;
-
   // Timer used before showing.
   base::OneShotTimer<MultiWindowResizeController> show_timer_;
 
   scoped_ptr<views::Widget> resize_widget_;
 
   // If non-null we're in a resize loop.
   scoped_ptr<WorkspaceWindowResizer> window_resizer_;
 
   // Mouse coordinate passed to Show() in container's coodinates.
   gfx::Point show_location_in_parent_;
 
   // Bounds the widget was last shown at in screen coordinates.
   gfx::Rect show_bounds_in_screen_;
 
   // Used to detect whether the mouse is over the windows. While
   // |resize_widget_| is non-NULL (ie the widget is showing) we ignore calls
   // to Show().
   scoped_ptr<views::MouseWatcher> mouse_watcher_;
 
   DISALLOW_COPY_AND_ASSIGN(MultiWindowResizeController);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_WORKSPACE_MULTI_WINDOW_RESIZE_CONTROLLER_H_