Experimental alignment layout manager using a property on the views

ui/views/examples/anchor_example.h

+// 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_EXAMPLES_ANCHOR_EXAMPLE_H_
+#define UI_VIEWS_EXAMPLES_ANCHOR_EXAMPLE_H_
+
+#include <string>
+
+#include "base/macros.h"
+#include "ui/views/anchor_attribute.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/examples/example_base.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+namespace views {
+
+class LabelButton;
+
+namespace examples {
+
+// AnchorExample demonstrates how to use anchors to handle size/position
+// relative to the parent.
+class VIEWS_EXAMPLES_EXPORT AnchorExample : public ExampleBase,
+                                            public ButtonListener {
+ public:
+  AnchorExample();
+  ~AnchorExample() override;
+
+  // ExampleBase:
+  void CreateExampleView(View* container) override;
+
+ private:
+  // ButtonListener:
+  void ButtonPressed(Button* sender, const ui::Event& event) override;
+  base::string16 FillText(Fill fill);
+  base::string16 AnchorText(Anchor anchor);
+  base::string16 AnchorsText(Anchors anchors);
+  void ClearAlignButtons(View *view);
+  void ReflectAnchors(View *view, AnchorAttribute *attribute);
+
+  Label* anchored_view_label_ = nullptr;
+  View* work_panel_ = nullptr;
+  Anchors current_anchors_ = {Anchor::Left, Anchor::Top};
+
+  DISALLOW_COPY_AND_ASSIGN(AnchorExample);
+};
+
+}  // namespace examples
+}  // namespace views
+
+#endif  // UI_VIEWS_EXAMPLES_ANCHOR_EXAMPLE_H_