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1 // Copyright 2013 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 CHROME_BROWSER_UI_VIEWS_APP_LIST_WIN_ACTIVATION_TRACKER_WIN_H_ | |
6 #define CHROME_BROWSER_UI_VIEWS_APP_LIST_WIN_ACTIVATION_TRACKER_WIN_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "base/timer/timer.h" | |
10 #include "ui/app_list/views/app_list_view_observer.h" | |
11 | |
12 class AppListServiceWin; | |
13 | |
14 // Periodically checks to see if an AppListView has lost focus using a timer. | |
15 class ActivationTrackerWin : public app_list::AppListViewObserver { | |
16 public: | |
17 explicit ActivationTrackerWin(AppListServiceWin* service); | |
18 ~ActivationTrackerWin() override; | |
19 | |
20 // app_list::AppListViewObserver: | |
21 void OnActivationChanged(views::Widget* widget, bool active) override; | |
22 | |
23 void OnViewHidden(); | |
24 | |
25 private: | |
26 // Dismisses the app launcher if it has lost focus and the user is not trying | |
27 // to pin it. | |
28 void MaybeDismissAppList(); | |
29 | |
30 // Determines whether the app launcher should be dismissed. This should be | |
31 // called at most once per timer tick, as it is not idempotent (if the taskbar | |
32 // is focused, it waits until it has been called twice before dismissing the | |
33 // app list). | |
34 bool ShouldDismissAppList(); | |
35 | |
36 AppListServiceWin* service_; // Weak. Owns this. | |
37 | |
38 // Records whether, on the previous timer tick, the taskbar had focus without | |
39 // the right mouse button being down. We allow the taskbar to have focus for | |
40 // one tick before dismissing the app list. This allows the app list to be | |
41 // kept visible if the taskbar is seen briefly without the right mouse button | |
42 // down, but not if this happens for two consecutive ticks. | |
43 bool taskbar_has_focus_; | |
44 | |
45 // Timer used to check if the taskbar or app list is active. Using a timer | |
46 // means we don't need to hook Windows, which is apparently not possible | |
47 // since Vista (and is not nice at any time). | |
48 base::RepeatingTimer timer_; | |
49 | |
50 DISALLOW_COPY_AND_ASSIGN(ActivationTrackerWin); | |
51 }; | |
52 | |
53 #endif // CHROME_BROWSER_UI_VIEWS_APP_LIST_WIN_ACTIVATION_TRACKER_WIN_H_ | |
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