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// Copyright (c) 2011 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_VIEWS_LAYOUT_FILL_LAYOUT_H_
#define UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
#include "base/compiler_specific.h"
#include "base/macros.h"
#include "ui/views/layout/layout_manager_base.h"
#include "ui/views/view.h"
namespace views {
///////////////////////////////////////////////////////////////////////////////
//
// FillLayout
// A simple LayoutManager that causes the associated view's children to be
// sized to match the bounds of its parent. The preferred size/height is
// is calculated as the maximum values across all child views of the host.
//
///////////////////////////////////////////////////////////////////////////////
class VIEWS_EXPORT FillLayout : public LayoutManagerBase {
public:
FillLayout();
~FillLayout() override;
bool include_hidden_views() const { return include_hidden_views_; }
FillLayout& SetIncludeHiddenViews(bool include_hidden_views);
bool minimum_size_enabled() const { return minimum_size_enabled_; }
FillLayout& SetMinimumSizeEnabled(bool minimum_size_enabled);
// LayoutManagerBase:
ProposedLayout CalculateProposedLayout(
const SizeBounds& size_bounds) const override;
gfx::Size GetPreferredSize(const View* host) const override;
gfx::Size GetMinimumSize(const View* host) const override;
int GetPreferredHeightForWidth(const View* host, int width) const override;
private:
// Uses |include_hidden_views| to determine whether a child should be
// included; calls either IsChildIncludedInLayout() or
// IsChildViewIgnoredByLayout() as appropriate.
bool ShouldIncludeChild(const View* view) const;
// Whether to include hidden views in size calculations. Default is to
// include for backwards compatibility.
bool include_hidden_views_ = true;
// Whether to compute minimum size separately, as the maximum of all of the
// included child views' minimum size (true), or to simply return the
// preferred size (false).
//
// Off by default for backwards-compatibility with legacy uses of FillLayout.
bool minimum_size_enabled_ = false;
DISALLOW_COPY_AND_ASSIGN(FillLayout);
};
} // namespace views
#endif // UI_VIEWS_LAYOUT_FILL_LAYOUT_H_
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