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// Copyright 2012 The Chromium Authors
// 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_
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