chromium/ui/views/layout/layout_manager.h

// Copyright 2011 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_VIEWS_LAYOUT_LAYOUT_MANAGER_H_
#define UI_VIEWS_LAYOUT_LAYOUT_MANAGER_H_

#include <vector>

#include "base/memory/raw_ptr.h"
#include "ui/views/layout/layout_types.h"
#include "ui/views/views_export.h"

namespace gfx {
class Size;
}

namespace views {

class View;

// LayoutManager is used by View to accomplish the following:
//
// . Provides preferred sizing information, see GetPreferredSize() and
//   GetPreferredHeightForWidth().
// . To position and size (aka layout) the children of the associated View. See
//   Layout() for details.
//
// How a LayoutManager operates is specific to the LayoutManager. Non-trivial
// LayoutManagers calculate preferred size and layout information using the
// minimum and preferred size of the children of the View. That is, they
// make use of View::GetMinimumSize(), View::CalculatePreferredSize() and/or
// View::GetHeightForWidth().
class VIEWS_EXPORT LayoutManager { … };

}  // namespace views

#endif  // UI_VIEWS_LAYOUT_LAYOUT_MANAGER_H_