| // Copyright (c) 2012 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_LAYOUT_MANAGER_H_ |
| #define UI_AURA_LAYOUT_MANAGER_H_ |
| |
| #include "ui/aura/aura_export.h" |
| |
| namespace gfx { |
| class Rect; |
| } |
| |
| namespace aura { |
| class Window; |
| |
| // An interface implemented by an object that places child windows. |
| class AURA_EXPORT LayoutManager { |
| public: |
| LayoutManager(); |
| virtual ~LayoutManager(); |
| |
| // Invoked when the window is resized. |
| virtual void OnWindowResized() = 0; |
| |
| // Invoked when the window |child| has been added. |
| virtual void OnWindowAddedToLayout(Window* child) = 0; |
| |
| // Invoked prior to removing |window|. |
| virtual void OnWillRemoveWindowFromLayout(Window* child) = 0; |
| |
| // Invoked after removing |window|. |
| virtual void OnWindowRemovedFromLayout(Window* child) = 0; |
| |
| // Invoked when the |SetVisible()| is invoked on the window |child|. |
| // |visible| is the value supplied to |SetVisible()|. If |visible| is true, |
| // window->IsVisible() may still return false. See description in |
| // Window::IsVisible() for details. |
| virtual void OnChildWindowVisibilityChanged(Window* child, bool visible) = 0; |
| |
| // Invoked when |Window::SetBounds| is called on |child|. |
| // Implementation must call |SetChildBoundsDirect| to change the |
| // |child|'s bounds. LayoutManager may modify |requested_bounds| |
| // before applying, or ignore the request. |
| virtual void SetChildBounds(Window* child, |
| const gfx::Rect& requested_bounds) = 0; |
| |
| protected: |
| // Sets the child's bounds forcibly. LayoutManager is responsible |
| // for checking the state and make sure the bounds are correctly |
| // adjusted. |
| void SetChildBoundsDirect(aura::Window* child, const gfx::Rect& bounds); |
| }; |
| |
| } // namespace aura |
| |
| #endif // UI_AURA_LAYOUT_MANAGER_H_ |