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   ~ResizeHandleWindowTargeter() override;
  29
  30  private:
  31   // wm::WindowStateObserver:
  32   void OnPostWindowStateTypeChange(wm::WindowState* window_state,
  33                                    wm::WindowStateType old_type) override;
  34   // aura::WindowObserver:
  35   void OnWindowDestroying(aura::Window* window) override;
  36
  37   // aura::WindowTargeter:
  38   ui::EventTarget* FindTargetForLocatedEvent(ui::EventTarget* root,
  39                                              ui::LocatedEvent* event) override;
  40   bool SubtreeShouldBeExploredForEvent(ui::EventTarget* target,
  41                                        const ui::LocatedEvent& event) override;
  42
  43   // The targeter does not take ownership of |window_| or
  44   // |immersive_controller_|.
  45   aura::Window* window_;
  46   gfx::Insets frame_border_inset_;
  47   ImmersiveFullscreenController* immersive_controller_;
  48
  49   DISALLOW_COPY_AND_ASSIGN(ResizeHandleWindowTargeter);
  50 };
  51
  52 }  // namespace ash
  53
  54 #endif  // ASH_WM_RESIZE_HANDLE_WINDOW_TARGETER_H_