ash/wm/resize_handle_window_targeter.h

   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_