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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef ASH_WM_RESIZE_HANDLE_WINDOW_TARGETER_H_
      6 #define ASH_WM_RESIZE_HANDLE_WINDOW_TARGETER_H_
      7 
      8 #include "ash/wm/window_state_observer.h"
      9 #include "ui/aura/window_observer.h"
     10 #include "ui/aura/window_targeter.h"
     11 #include "ui/gfx/geometry/insets.h"
     12 
     13 namespace ash {
     14 
     15 class ImmersiveFullscreenController;
     16 
     17 // To allow easy resize, the resize handles should slightly overlap the content
     18 // area of non-maximized and non-fullscreen windows. For immersive fullscreen
     19 // windows, this targeter makes sure that touch-events towards the top of the
     20 // screen are targeted to the window itself (instead of a child window that may
     21 // otherwise have been targeted) when the top-of-window views are not revealed.
     22 class ResizeHandleWindowTargeter : public wm::WindowStateObserver,
     23                                    public aura::WindowObserver,
     24                                    public aura::WindowTargeter {
     25  public:
     26   ResizeHandleWindowTargeter(aura::Window* window,
     27                              ImmersiveFullscreenController* immersive);
     28   virtual ~ResizeHandleWindowTargeter();
     29 
     30  private:
     31   // wm::WindowStateObserver:
     32   virtual void OnPostWindowStateTypeChange(
     33       wm::WindowState* window_state,
     34       wm::WindowStateType old_type) OVERRIDE;
     35   // aura::WindowObserver:
     36   virtual void OnWindowDestroying(aura::Window* window) OVERRIDE;
     37 
     38   // aura::WindowTargeter:
     39   virtual ui::EventTarget* FindTargetForLocatedEvent(
     40       ui::EventTarget* root,
     41       ui::LocatedEvent* event) OVERRIDE;
     42   virtual bool SubtreeShouldBeExploredForEvent(
     43       ui::EventTarget* target,
     44       const ui::LocatedEvent& event) OVERRIDE;
     45 
     46   // The targeter does not take ownership of |window_| or
     47   // |immersive_controller_|.
     48   aura::Window* window_;
     49   gfx::Insets frame_border_inset_;
     50   ImmersiveFullscreenController* immersive_controller_;
     51 
     52   DISALLOW_COPY_AND_ASSIGN(ResizeHandleWindowTargeter);
     53 };
     54 
     55 }  // namespace ash
     56 
     57 #endif  // ASH_WM_RESIZE_HANDLE_WINDOW_TARGETER_H_
     58