Implemented system tray UI for new account management.

ash/system/user/button_from_view.cc

+// Copyright 2014 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 "ash/system/user/button_from_view.h"
+
+#include "ash/system/tray/tray_constants.h"
+#include "ui/views/background.h"
+#include "ui/views/border.h"
+#include "ui/views/layout/box_layout.h"
+
+namespace ash {
+
+namespace {
+
+// The border color of the user button.
+const SkColor kBorderColor = 0xffdcdcdc;
+
+}  // namespace
+
+namespace tray {
+
+ButtonFromView::ButtonFromView(views::View* content,
+                               views::ButtonListener* listener,
+                               bool highlight_on_hover)
+    : CustomButton(listener),
+      content_(content),
+      highlight_on_hover_(highlight_on_hover),
+      button_hovered_(false),
+      show_border_(false) {
+  set_notify_enter_exit_on_child(true);
+  SetLayoutManager(
+      new views::BoxLayout(views::BoxLayout::kHorizontal, 0, 0, 0));
+  AddChildView(content_);
+  ShowActive();
+}
+
+ButtonFromView::~ButtonFromView() {}
+
+void ButtonFromView::ForceBorderVisible(bool show) {
+  show_border_ = show;
+  ShowActive();
+}
+
+void ButtonFromView::OnMouseEntered(const ui::MouseEvent& event) {
+  button_hovered_ = true;
+  ShowActive();
+}
+
+void ButtonFromView::OnMouseExited(const ui::MouseEvent& event) {
+  button_hovered_ = false;
+  ShowActive();
+}
+
+void ButtonFromView::ShowActive() {
+  bool border_visible =
+      (button_hovered_ && highlight_on_hover_) || show_border_;
+  SkColor border_color = border_visible ? kBorderColor : SK_ColorTRANSPARENT;
+  SetBorder(views::Border::CreateSolidBorder(1, border_color));
+  if (highlight_on_hover_) {
+    SkColor background_color =
+        button_hovered_ ? kHoverBackgroundColor : kBackgroundColor;
+    content_->set_background(
+        views::Background::CreateSolidBackground(background_color));
+    set_background(views::Background::CreateSolidBackground(background_color));
+  }
+  SchedulePaint();
+}
+
+}  // namespace tray
+}  // namespace ash