Create system tray item for accessing chrome://slow

ash/system/chromeos/tray_tracing.cc

+// Copyright 2013 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/chromeos/tray_tracing.h"
+
+#include "ash/system/tray/actionable_view.h"
+#include "ash/system/tray/fixed_sized_image_view.h"
+#include "ash/system/tray/system_tray.h"
+#include "ash/system/tray/system_tray_delegate.h"
+#include "ash/system/tray/system_tray_notifier.h"
+#include "ash/system/tray/tray_constants.h"
+#include "grit/ash_resources.h"
+#include "grit/ash_strings.h"
+#include "ui/base/l10n/l10n_util.h"
+#include "ui/base/resource/resource_bundle.h"
+#include "ui/gfx/image/image.h"
+#include "ui/views/controls/image_view.h"
+#include "ui/views/controls/label.h"
+#include "ui/views/layout/box_layout.h"
+
+namespace ash {
+namespace internal {
+
+namespace tray {
+
+class DefaultTracingView : public ash::internal::ActionableView {
+ public:
+  DefaultTracingView() {
+    SetLayoutManager(new views::BoxLayout(
+        views::BoxLayout::kHorizontal,
+        ash::kTrayPopupPaddingHorizontal, 0,
+        ash::kTrayPopupPaddingBetweenItems));
+
+    ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
+    image_ =
+        new ash::internal::FixedSizedImageView(0, ash::kTrayPopupItemHeight);
+    image_->SetImage(
+        bundle.GetImageNamed(IDR_AURA_UBER_TRAY_TRACING).ToImageSkia());
+    AddChildView(image_);
+
+    label_ = new views::Label();
+    label_->SetMultiLine(true);
+    label_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
+    label_->SetText(bundle.GetLocalizedString(IDS_ASH_STATUS_TRAY_TRACING));
+    AddChildView(label_);
+  }
+
+  virtual ~DefaultTracingView() {}
+
+ private:
+  // Overridden from ActionableView.
+  virtual bool PerformAction(const ui::Event& event) OVERRIDE {
+    ash::Shell::GetInstance()->system_tray_delegate()->ShowChromeSlow();
+    return true;
+  }
+
+  views::ImageView* image_;
+  views::Label* label_;
+
+  DISALLOW_COPY_AND_ASSIGN(DefaultTracingView);
+};
+
+}  // namespace tray
+
+////////////////////////////////////////////////////////////////////////////////
+// ash::internal::TrayTracing
+
+TrayTracing::TrayTracing(SystemTray* system_tray)
+    : TrayImageItem(system_tray, IDR_AURA_UBER_TRAY_TRACING),
+      default_(NULL) {
+  DCHECK(Shell::GetInstance()->delegate());
+  DCHECK(system_tray);
+  Shell::GetInstance()->system_tray_notifier()->AddTracingObserver(this);
+}
+
+TrayTracing::~TrayTracing() {
+  Shell::GetInstance()->system_tray_notifier()->RemoveTracingObserver(this);
+}
+
+void TrayTracing::SetTrayIconVisible(bool visible) {
+  if (tray_view())
+    tray_view()->SetVisible(visible);
+}
+
+bool TrayTracing::GetInitialVisibility() {
+  return false;
+}
+
+views::View* TrayTracing::CreateDefaultView(user::LoginStatus status) {
+  CHECK(default_ == NULL);
+  default_ = new tray::DefaultTracingView();
+  return default_;
+}
+
+views::View* TrayTracing::CreateDetailedView(user::LoginStatus status) {
+  return NULL;
+}
+
+void TrayTracing::DestroyDefaultView() {
+  default_ = NULL;
+}
+
+void TrayTracing::DestroyDetailedView() {
+}
+
+void TrayTracing::OnTracingModeChanged(bool value) {
+  SetTrayIconVisible(value);
+}
+
+}  // namespace internal
+}  // namespace ash