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_PUBLIC_CPP_VIEW_MANAGER_NODE_OBSERVER_H_ 6 #define MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_NODE_OBSERVER_H_ 7 8 #include <vector> 9 10 #include "base/basictypes.h" 11 12 #include "mojo/services/public/cpp/view_manager/node.h" 13 14 namespace gfx { 15 class Rect; 16 } 17 18 namespace mojo { 19 namespace view_manager { 20 21 class Node; 22 class View; 23 24 class NodeObserver { 25 public: 26 enum DispositionChangePhase { 27 DISPOSITION_CHANGING, 28 DISPOSITION_CHANGED 29 }; 30 31 struct TreeChangeParams { 32 TreeChangeParams(); 33 Node* target; 34 Node* old_parent; 35 Node* new_parent; 36 Node* receiver; 37 DispositionChangePhase phase; 38 }; 39 40 virtual void OnTreeChange(const TreeChangeParams& params) {} 41 42 virtual void OnNodeReordered(Node* node, 43 Node* relative_node, 44 OrderDirection direction, 45 DispositionChangePhase phase) {} 46 47 virtual void OnNodeDestroy(Node* node, DispositionChangePhase phase) {} 48 49 virtual void OnNodeActiveViewChange(Node* node, 50 View* old_view, 51 View* new_view, 52 DispositionChangePhase phase) {} 53 54 virtual void OnNodeBoundsChange(Node* node, 55 const gfx::Rect& old_bounds, 56 const gfx::Rect& new_bounds, 57 DispositionChangePhase phase) {} 58 59 protected: 60 virtual ~NodeObserver() {} 61 }; 62 63 } // namespace view_manager 64 } // namespace mojo 65 66 #endif // MOJO_SERVICES_PUBLIC_CPP_VIEW_MANAGER_NODE_OBSERVER_H_ 67
