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Side by Side Diff: views/focus/widget_focus_manager.h

Issue 8588064: views: Move bubble, events, focus and layout to ui/views/. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Created 9 years, 1 month ago
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1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. 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 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_ 5 #ifndef VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_
6 #define VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_ 6 #define VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_
7 #pragma once 7 #pragma once
8 8
9 #include "base/basictypes.h" 9 #include "ui/views/focus/widget_focus_manager.h"
10 #include "base/observer_list.h" 10 // TODO(tfarina): remove this file once all includes have been updated.
11 #include "ui/gfx/native_widget_types.h"
12 #include "views/views_export.h"
13
14 template <typename T> struct DefaultSingletonTraits;
15
16 namespace views {
17
18 // This interface should be implemented by classes that want to be notified when
19 // the native focus is about to change. Listeners implementing this interface
20 // will be invoked for all native focus changes across the entire Chrome
21 // application. FocusChangeListeners are only called for changes within the
22 // children of a single top-level native-view.
23 class WidgetFocusChangeListener {
24 public:
25 virtual void OnNativeFocusChange(gfx::NativeView focused_before,
26 gfx::NativeView focused_now) = 0;
27
28 protected:
29 virtual ~WidgetFocusChangeListener() {}
30 };
31
32 class VIEWS_EXPORT WidgetFocusManager {
33 public:
34 // Returns the singleton instance.
35 static WidgetFocusManager* GetInstance();
36
37 // Adds/removes a WidgetFocusChangeListener |listener| to the set of
38 // active listeners.
39 void AddFocusChangeListener(WidgetFocusChangeListener* listener);
40 void RemoveFocusChangeListener(WidgetFocusChangeListener* listener);
41
42 // To be called when native-focus shifts from |focused_before| to
43 // |focused_now|.
44 // TODO(port) : Invocations to this routine are only implemented for
45 // the Win32 platform. Calls need to be placed appropriately for
46 // non-Windows environments.
47 void OnWidgetFocusEvent(gfx::NativeView focused_before,
48 gfx::NativeView focused_now);
49
50 // Enable/Disable notification of registered listeners during calls
51 // to OnWidgetFocusEvent. Used to prevent unwanted focus changes from
52 // propagating notifications.
53 void EnableNotifications() { enabled_ = true; }
54 void DisableNotifications() { enabled_ = false; }
55
56 private:
57 friend struct DefaultSingletonTraits<WidgetFocusManager>;
58
59 WidgetFocusManager();
60 ~WidgetFocusManager();
61
62 ObserverList<WidgetFocusChangeListener> focus_change_listeners_;
63
64 bool enabled_;
65
66 DISALLOW_COPY_AND_ASSIGN(WidgetFocusManager);
67 };
68
69 // A basic helper class that is used to disable native focus change
70 // notifications within a scope.
71 class VIEWS_EXPORT AutoNativeNotificationDisabler {
72 public:
73 AutoNativeNotificationDisabler();
74 ~AutoNativeNotificationDisabler();
75
76 private:
77 DISALLOW_COPY_AND_ASSIGN(AutoNativeNotificationDisabler);
78 };
79
80 } // namespace views
81 11
82 #endif // VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_ 12 #endif // VIEWS_FOCUS_WIDGET_FOCUS_MANAGER_H_
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