| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_ |
| #define UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_ |
| |
| #include "ui/aura/aura_export.h" |
| #include "ui/aura/window.h" |
| |
| namespace gfx { |
| class Point; |
| } |
| |
| namespace aura { |
| class WindowTreeHost; |
| |
| class AURA_EXPORT WindowTreeHostObserver { |
| public: |
| // Called when the host's client size has changed. |
| virtual void OnHostResized(WindowTreeHost* host) {} |
| |
| // Called when the host is moved on screen. |
| virtual void OnHostMovedInPixels(WindowTreeHost* host, |
| const gfx::Point& new_origin_in_pixels) {} |
| |
| // Called when the host is moved to a different workspace. |
| virtual void OnHostWorkspaceChanged(WindowTreeHost* host) {} |
| |
| // Called when the native window system sends the host request to close. |
| virtual void OnHostCloseRequested(WindowTreeHost* host) {} |
| |
| // Called when the occlusion status of the native window changes, iff |
| // occlusion tracking is enabled for a descendant of the root. |
| virtual void OnOcclusionStateChanged(WindowTreeHost* host, |
| Window::OcclusionState new_state) {} |
| |
| protected: |
| virtual ~WindowTreeHostObserver() {} |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_WINDOW_TREE_HOST_OBSERVER_H_ |