Experimental alignment layout manager using a property on the views

ui/views/examples/fill_example.cc

+// 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.
+
+#include "ui/views/examples/fill_example.h"
+
+#include "base/macros.h"
+#include "base/strings/utf_string_conversions.h"
+#include "build/build_config.h"
+#include "ui/views/background.h"
+#include "ui/views/border.h"
+#include "ui/views/controls/button/label_button.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/layout/align_layout.h"
+#include "ui/views/view.h"
+#include "ui/views/widget/widget.h"
+
+using base::ASCIIToUTF16;
+
+namespace views {
+namespace examples {
+
+FillExample::FillExample() : ExampleBase("Fill") {}
+
+FillExample::~FillExample() {}
+
+void FillExample::CreateExampleView(View* container) {
+  container->SetLayoutManager(new AlignLayout());
+  new_fill_view_button_ = new LabelButton(this, ASCIIToUTF16("New View"));
+  new_fill_view_button_->SetFocusForPlatform();
+  new_fill_view_button_->set_request_focus_on_press(true);
+  new_fill_view_button_->SetStyle(Button::STYLE_BUTTON);
+  new_fill_view_button_->attributes().Add(
+      base::WrapUnique(new FillAttribute(views::Fill::Content)));
+  container->AddChildView(new_fill_view_button_);
+}
+
+void FillExample::ButtonPressed(Button* sender, const ui::Event& event) {
+  Label* label = new Label(LabelText(current_fill_));
+  label->SetBorder(Border::CreateSolidBorder(1, SK_ColorGRAY));
+  label->attributes().Add(base::WrapUnique(new FillAttribute(current_fill_)));
+  label->SetBounds(0, 0, 20, 20);
+  sender->parent()->AddChildView(label);
+  sender->parent()->Layout();
+  switch (current_fill_) {
+    case views::Fill::Top: {
+      current_fill_ = views::Fill::Bottom;
+      break;
+    }
+    case views::Fill::Bottom: {
+      current_fill_ = views::Fill::Left;
+      break;
+    }
+    case views::Fill::Left: {
+      current_fill_ = views::Fill::Right;
+      break;
+    }
+    case views::Fill::Right: {
+      current_fill_ = views::Fill::Top;
+      break;
+    }
+    default:
+      current_fill_ = views::Fill::Top;
+  }
+}
+
+base::string16 FillExample::LabelText(views::Fill fill) {
+  switch (fill) {
+    case views::Fill::Top:
+      return ASCIIToUTF16("Top Align");
+    case views::Fill::Bottom:
+      return ASCIIToUTF16("Bottom Align");
+    case views::Fill::Left:
+      return ASCIIToUTF16("Left Align");
+    case views::Fill::Right:
+      return ASCIIToUTF16("Right Align");
+    default:
+      return ASCIIToUTF16("None Or Content Align");
+  }
+}
+
+}  // namespace examples
+}  // namespace views