mojo/services/view_manager/public/cpp/view_observer.h - Issue 861683003: Move services code brought in from Mojo to live under //third_party.

Side by Side Diff: mojo/services/view_manager/public/cpp/view_observer.h

Issue 861683003: Move services code brought in from Mojo to live under //third_party. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master

Patch Set: Rebase Created 5 years, 10 months ago

Use n/p to move between diff chunks; N/P to move between comments. Draft comments are only viewable by you.

Jump to:

View unified diff | Download patch

OLD	NEW
	(Empty)
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 MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_OBSERVER_H_

6 #define MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_OBSERVER_H_

7

8 #include <vector>

9

10 #include "base/basictypes.h"

11

12 #include "input_events/public/interfaces/input_events.mojom.h"

13 #include "view_manager/public/cpp/view.h"

14

15 namespace mojo {

16

17 class View;

18

19 // A note on -ing and -ed suffixes:

20 //

21 // -ing methods are called before changes are applied to the local view model.

22 // -ed methods are called after changes are applied to the local view model.

23 //

24 // If the change originated from another connection to the view manager, it's

25 // possible that the change has already been applied to the service-side model

26 // prior to being called, so for example in the case of OnViewDestroying(), it's

27 // possible the view has already been destroyed on the service side.

28

29 class ViewObserver {

30 public:

31 struct TreeChangeParams {

32 TreeChangeParams();

33 View* target;

34 View* old_parent;

35 View* new_parent;

36 View* receiver;

37 };

38

39 virtual void OnTreeChanging(const TreeChangeParams& params) {}

40 virtual void OnTreeChanged(const TreeChangeParams& params) {}

41

42 virtual void OnViewReordering(View* view,

43 View* relative_view,

44 OrderDirection direction) {}

45 virtual void OnViewReordered(View* view,

46 View* relative_view,

47 OrderDirection direction) {}

48

49 virtual void OnViewDestroying(View* view) {}

50 virtual void OnViewDestroyed(View* view) {}

51

52 virtual void OnViewBoundsChanging(View* view,

53 const Rect& old_bounds,

54 const Rect& new_bounds) {}

55 virtual void OnViewBoundsChanged(View* view,

56 const Rect& old_bounds,

57 const Rect& new_bounds) {}

58

59 virtual void OnViewViewportMetricsChanged(View* view,

60 const ViewportMetrics& old_bounds,

61 const ViewportMetrics& new_bounds) {

62 }

63

64 virtual void OnCaptureChanged(View* gained_capture, View* lost_capture) {}

65 virtual void OnViewFocusChanged(View* gained_focus, View* lost_focus) {}

66 virtual void OnViewActivationChanged(View* gained_active, View* lost_active) {

67 }

68

69 virtual void OnViewInputEvent(View* view, const EventPtr& event) {}

70

71 virtual void OnViewVisibilityChanging(View* view) {}

72 virtual void OnViewVisibilityChanged(View* view) {}

73

74 // Invoked when this View's shared properties have changed. This can either

75 // be caused by SetSharedProperty() being called locally, or by us receiving

76 // a mojo message that this property has changed. If this property has been

77 // added, \|old_data\| is null. If this property was removed, \|new_data\| is

78 // null.

79 virtual void OnViewSharedPropertyChanged(

80 View* view,

81 const std::string& name,

82 const std::vector<uint8_t>* old_data,

83 const std::vector<uint8_t>* new_data) {}

84

85 // Invoked when SetProperty() or ClearProperty() is called on the window.

86 // \|key\| is either a WindowProperty<T>* (SetProperty, ClearProperty). Either

87 // way, it can simply be compared for equality with the property

88 // constant. \|old\| is the old property value, which must be cast to the

89 // appropriate type before use.

90 virtual void OnViewLocalPropertyChanged(

91 View* view,

92 const void* key,

93 intptr_t old) {}

94

95 virtual void OnViewEmbeddedAppDisconnected(View* view) {}

96

97 // Sent when the drawn state changes. This is only sent for the root nodes

98 // when embedded.

99 virtual void OnViewDrawnChanging(View* view) {}

100 virtual void OnViewDrawnChanged(View* view) {}

101

102 protected:

103 virtual ~ViewObserver() {}

104 };

105

106 } // namespace mojo

107

108 #endif // MOJO_SERVICES_VIEW_MANAGER_PUBLIC_CPP_VIEW_OBSERVER_H_

OLD	NEW