chrome/browser/ui/panels/panel_mouse_watcher.cc

   1 // Copyright (c) 2011 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 "chrome/browser/ui/panels/panel_mouse_watcher.h"
   6
   7 #include "chrome/browser/ui/panels/panel_mouse_watcher_observer.h"
   8 #include "ui/gfx/geometry/point.h"
   9
  10 PanelMouseWatcher::PanelMouseWatcher() {
  11 }
  12
  13 PanelMouseWatcher::~PanelMouseWatcher() {
  14 }
  15
  16 void PanelMouseWatcher::AddObserver(PanelMouseWatcherObserver* observer) {
  17   bool already_started = observers_.might_have_observers();
  18   observers_.AddObserver(observer);
  19   if (!already_started)
  20     Start();
  21 }
  22
  23 void PanelMouseWatcher::RemoveObserver(PanelMouseWatcherObserver* observer) {
  24   DCHECK(observers_.HasObserver(observer));
  25   observers_.RemoveObserver(observer);
  26   if (!observers_.might_have_observers())
  27     Stop();
  28 }
  29
  30 void PanelMouseWatcher::NotifyMouseMovement(const gfx::Point& mouse_position) {
  31   FOR_EACH_OBSERVER(PanelMouseWatcherObserver, observers_,
  32                     OnMouseMove(mouse_position));
  33 }