Implemented system tray UI for new account management.

ash/system/user/rounded_image_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/rounded_image_view.h"
+#include "skia/ext/image_operations.h"
+#include "third_party/skia/include/core/SkPaint.h"
+#include "third_party/skia/include/core/SkPath.h"
+#include "ui/gfx/canvas.h"
+#include "ui/gfx/image/image_skia_operations.h"
+#include "ui/gfx/skia_util.h"
+
+namespace ash {
+namespace tray {
+
+RoundedImageView::RoundedImageView(int corner_radius, bool active_user)
+    : active_user_(active_user) {
+  for (int i = 0; i < 4; ++i)
+    corner_radius_[i] = corner_radius;
+}
+
+RoundedImageView::~RoundedImageView() {}
+
+void RoundedImageView::SetImage(const gfx::ImageSkia& img,
+                                const gfx::Size& size) {
+  image_ = img;
+  image_size_ = size;
+
+  // Try to get the best image quality for the avatar.
+  resized_ = gfx::ImageSkiaOperations::CreateResizedImage(
+      image_, skia::ImageOperations::RESIZE_BEST, size);
+  if (GetWidget() && visible()) {
+    PreferredSizeChanged();
+    SchedulePaint();
+  }
+}
+
+void RoundedImageView::SetCornerRadii(int top_left,
+                                      int top_right,
+                                      int bottom_right,
+                                      int bottom_left) {
+  corner_radius_[0] = top_left;
+  corner_radius_[1] = top_right;
+  corner_radius_[2] = bottom_right;
+  corner_radius_[3] = bottom_left;
+}
+
+gfx::Size RoundedImageView::GetPreferredSize() {
+  return gfx::Size(image_size_.width() + GetInsets().width(),
+                   image_size_.height() + GetInsets().height());
+}
+
+void RoundedImageView::OnPaint(gfx::Canvas* canvas) {
+  View::OnPaint(canvas);
+  gfx::Rect image_bounds(size());
+  image_bounds.ClampToCenteredSize(GetPreferredSize());
+  image_bounds.Inset(GetInsets());
+  const SkScalar kRadius[8] = {
+    SkIntToScalar(corner_radius_[0]),
+    SkIntToScalar(corner_radius_[0]),
+    SkIntToScalar(corner_radius_[1]),
+    SkIntToScalar(corner_radius_[1]),
+    SkIntToScalar(corner_radius_[2]),
+    SkIntToScalar(corner_radius_[2]),
+    SkIntToScalar(corner_radius_[3]),
+    SkIntToScalar(corner_radius_[3])
+  };
+  SkPath path;
+  path.addRoundRect(gfx::RectToSkRect(image_bounds), kRadius);
+  SkPaint paint;
+  paint.setAntiAlias(true);
+  paint.setXfermodeMode(active_user_ ? SkXfermode::kSrcOver_Mode
+                                     : SkXfermode::kLuminosity_Mode);
+  canvas->DrawImageInPath(
+      resized_, image_bounds.x(), image_bounds.y(), path, paint);
+}
+
+}  // namespace tray
+}  // namespace ash