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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 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 COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ | 5 #ifndef COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ |
6 #define COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ | 6 #define COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ |
7 | 7 |
8 namespace mus { | 8 namespace view_manager { |
9 | 9 |
10 class ViewTreeImpl; | 10 class ViewTreeImpl; |
11 | 11 |
12 // A ViewTreeHostDelegate interface is implemented by an object that | 12 // A ViewTreeHostDelegate interface is implemented by an object that |
13 // has the ViewTreeImpl that is associated with the ViewTreeHostImpl that holds | 13 // has the ViewTreeImpl that is associated with the ViewTreeHostImpl that holds |
14 // a pointer to this object. Typically, a ViewTreeHostDelegate will also manage | 14 // a pointer to this object. Typically, a ViewTreeHostDelegate will also manage |
15 // the lifetime of the ViewTreeHostImpl and will delete the object when it gets | 15 // the lifetime of the ViewTreeHostImpl and will delete the object when it gets |
16 // informed of when the Display of the root is closed. | 16 // informed of when the Display of the root is closed. |
17 class ViewTreeHostDelegate { | 17 class ViewTreeHostDelegate { |
18 public: | 18 public: |
19 // Called when the window associated with the root is completely initialized | 19 // Called when the window associated with the root is completely initialized |
20 // (i.e. the ViewportMetrics for the display is known). | 20 // (i.e. the ViewportMetrics for the display is known). |
21 virtual void OnDisplayInitialized() = 0; | 21 virtual void OnDisplayInitialized() = 0; |
22 | 22 |
23 // Called when the window associated with the root is closed. | 23 // Called when the window associated with the root is closed. |
24 virtual void OnDisplayClosed() = 0; | 24 virtual void OnDisplayClosed() = 0; |
25 | 25 |
26 // Returns the ViewTreeImpl associated with the delegate. | 26 // Returns the ViewTreeImpl associated with the delegate. |
27 virtual ViewTreeImpl* GetViewTree() = 0; | 27 virtual ViewTreeImpl* GetViewTree() = 0; |
28 | 28 |
29 protected: | 29 protected: |
30 virtual ~ViewTreeHostDelegate() {} | 30 virtual ~ViewTreeHostDelegate() {} |
31 }; | 31 }; |
32 | 32 |
33 } // namespace mus | 33 } // namespace view_manager |
34 | 34 |
35 #endif // COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ | 35 #endif // COMPONENTS_MUS_VIEW_TREE_HOST_DELEGATE_H_ |
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