ui/aura/scoped_window_targeter.cc

   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 #include "ui/aura/scoped_window_targeter.h"
   6
   7 #include "ui/aura/window.h"
   8
   9 namespace aura {
  10
  11 ScopedWindowTargeter::ScopedWindowTargeter(
  12     Window* window,
  13     scoped_ptr<ui::EventTargeter> new_targeter)
  14     : window_(window),
  15       old_targeter_(window->SetEventTargeter(new_targeter.Pass())) {
  16   window_->AddObserver(this);
  17 }
  18
  19 ScopedWindowTargeter::~ScopedWindowTargeter() {
  20   if (window_) {
  21     window_->RemoveObserver(this);
  22     window_->SetEventTargeter(old_targeter_.Pass());
  23   }
  24 }
  25
  26 void ScopedWindowTargeter::OnWindowDestroyed(Window* window) {
  27   CHECK_EQ(window_, window);
  28   window_ = NULL;
  29   old_targeter_.reset();
  30 }
  31
  32 }  // namespace aura