Move ash tray audio UI code from ash/system/audio to ash/system/chromeos/audio.

ash/system/audio/tray_volume.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 "ash/system/audio/tray_volume.h"
-
-#include <cmath>
-
-#include "ash/ash_constants.h"
-#include "ash/shell.h"
-#include "ash/system/tray/system_tray_delegate.h"
-#include "ash/system/tray/system_tray_notifier.h"
-#include "ash/system/tray/tray_bar_button_with_title.h"
-#include "ash/system/tray/tray_constants.h"
-#include "ash/volume_control_delegate.h"
-#include "base/utf_string_conversions.h"
-#include "grit/ash_resources.h"
-#include "grit/ash_strings.h"
-#include "third_party/skia/include/core/SkCanvas.h"
-#include "third_party/skia/include/core/SkPaint.h"
-#include "third_party/skia/include/core/SkRect.h"
-#include "third_party/skia/include/effects/SkGradientShader.h"
-#include "ui/base/resource/resource_bundle.h"
-#include "ui/gfx/canvas.h"
-#include "ui/gfx/image/image.h"
-#include "ui/gfx/image/image_skia_operations.h"
-#include "ui/views/controls/button/image_button.h"
-#include "ui/views/controls/image_view.h"
-#include "ui/views/controls/label.h"
-#include "ui/views/controls/slider.h"
-#include "ui/views/layout/box_layout.h"
-#include "ui/views/view.h"
-
-namespace ash {
-namespace internal {
-
-namespace {
-const int kVolumeImageWidth = 25;
-const int kVolumeImageHeight = 25;
-
-// IDR_AURA_UBER_TRAY_VOLUME_LEVELS contains 5 images,
-// The one for mute is at the 0 index and the other
-// four are used for ascending volume levels.
-const int kVolumeLevels = 4;
-
-bool IsAudioMuted() {
-  return Shell::GetInstance()->system_tray_delegate()->
-      GetVolumeControlDelegate()->IsAudioMuted();
-}
-
-float GetVolumeLevel() {
-  return Shell::GetInstance()->system_tray_delegate()->
-      GetVolumeControlDelegate()->GetVolumeLevel();
-}
-
-}  // namespace
-
-namespace tray {
-
-class VolumeButton : public views::ToggleImageButton {
- public:
-  explicit VolumeButton(views::ButtonListener* listener)
-      : views::ToggleImageButton(listener),
-        image_index_(-1) {
-    SetImageAlignment(ALIGN_CENTER, ALIGN_MIDDLE);
-    image_ = ui::ResourceBundle::GetSharedInstance().GetImageNamed(
-        IDR_AURA_UBER_TRAY_VOLUME_LEVELS);
-    SetPreferredSize(gfx::Size(kTrayPopupItemHeight, kTrayPopupItemHeight));
-    Update();
-  }
-
-  virtual ~VolumeButton() {}
-
-  void Update() {
-    float level = GetVolumeLevel();
-    int image_index = IsAudioMuted() ?
-        0 : (level == 1.0 ?
-             kVolumeLevels :
-             std::max(1, int(std::ceil(level * (kVolumeLevels - 1)))));
-    if (image_index != image_index_) {
-      gfx::Rect region(0, image_index * kVolumeImageHeight,
-                       kVolumeImageWidth, kVolumeImageHeight);
-      gfx::ImageSkia image_skia = gfx::ImageSkiaOperations::ExtractSubset(
-          *(image_.ToImageSkia()), region);
-      SetImage(views::CustomButton::STATE_NORMAL, &image_skia);
-      image_index_ = image_index;
-    }
-    SchedulePaint();
-  }
-
- private:
-  // Overridden from views::View.
-  virtual gfx::Size GetPreferredSize() OVERRIDE {
-    gfx::Size size = views::ToggleImageButton::GetPreferredSize();
-    size.set_height(kTrayPopupItemHeight);
-    return size;
-  }
-
-  gfx::Image image_;
-  int image_index_;
-
-  DISALLOW_COPY_AND_ASSIGN(VolumeButton);
-};
-
-class MuteButton : public TrayBarButtonWithTitle {
- public:
-  explicit MuteButton(views::ButtonListener* listener)
-      : TrayBarButtonWithTitle(listener,
-                               -1,    // no title under mute button
-                               kTrayBarButtonWidth) {
-    Update();
-  }
-  virtual ~MuteButton() {}
-
-  void Update() {
-    UpdateButton(IsAudioMuted());
-    SchedulePaint();
-  }
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(MuteButton);
-};
-
-class VolumeSlider : public views::Slider {
- public:
-  explicit VolumeSlider(views::SliderListener* listener)
-      : views::Slider(listener, views::Slider::HORIZONTAL) {
-    set_focus_border_color(kFocusBorderColor);
-    SetValue(GetVolumeLevel());
-    SetAccessibleName(
-            ui::ResourceBundle::GetSharedInstance().GetLocalizedString(
-                IDS_ASH_STATUS_TRAY_VOLUME));
-    Update();
-  }
-  virtual ~VolumeSlider() {}
-
-  void Update() {
-    UpdateState(!IsAudioMuted());
-  }
-
-  DISALLOW_COPY_AND_ASSIGN(VolumeSlider);
-};
-
-class VolumeView : public views::View,
-                   public views::ButtonListener,
-                   public views::SliderListener {
- public:
-  VolumeView() {
-    SetLayoutManager(new views::BoxLayout(views::BoxLayout::kHorizontal,
-          kTrayPopupPaddingHorizontal, 0, kTrayPopupPaddingBetweenItems));
-
-    icon_ = new VolumeButton(this);
-    AddChildView(icon_);
-
-    mute_ = new MuteButton(this);
-    AddChildView(mute_);
-
-    slider_ = new VolumeSlider(this);
-    AddChildView(slider_);
-  }
-
-  virtual ~VolumeView() {}
-
-  void Update() {
-    icon_->Update();
-    mute_->Update();
-    slider_->Update();
-  }
-
-  void SetVolumeLevel(float percent) {
-    // The change in volume will be reflected via accessibility system events,
-    // so we prevent the UI event from being sent here.
-    slider_->set_enable_accessibility_events(false);
-    slider_->SetValue(percent);
-    // It is possible that the volume was (un)muted, but the actual volume level
-    // did not change. In that case, setting the value of the slider won't
-    // trigger an update. So explicitly trigger an update.
-    Update();
-    slider_->set_enable_accessibility_events(true);
-  }
-
- private:
-  // Overridden from views::View.
-  virtual void OnBoundsChanged(const gfx::Rect& old_bounds) OVERRIDE {
-    int w = width() - slider_->x();
-    slider_->SetSize(gfx::Size(w, slider_->height()));
-  }
-
-  // Overridden from views::ButtonListener.
-  virtual void ButtonPressed(views::Button* sender,
-                             const ui::Event& event) OVERRIDE {
-    CHECK(sender == icon_ || sender == mute_);
-    ash::Shell::GetInstance()->system_tray_delegate()->
-        GetVolumeControlDelegate()->SetAudioMuted(!IsAudioMuted());
-  }
-
-  // Overridden from views:SliderListener.
-  virtual void SliderValueChanged(views::Slider* sender,
-                                  float value,
-                                  float old_value,
-                                  views::SliderChangeReason reason) OVERRIDE {
-    if (reason == views::VALUE_CHANGED_BY_USER) {
-      ash::Shell::GetInstance()->system_tray_delegate()->
-          GetVolumeControlDelegate()->SetVolumeLevel(value);
-    }
-    icon_->Update();
-  }
-
-  VolumeButton* icon_;
-  MuteButton* mute_;
-  VolumeSlider* slider_;
-
-  DISALLOW_COPY_AND_ASSIGN(VolumeView);
-};
-
-}  // namespace tray
-
-TrayVolume::TrayVolume(SystemTray* system_tray)
-    : TrayImageItem(system_tray, IDR_AURA_UBER_TRAY_VOLUME_MUTE),
-      volume_view_(NULL),
-      is_default_view_(false) {
-  Shell::GetInstance()->system_tray_notifier()->AddAudioObserver(this);
-}
-
-TrayVolume::~TrayVolume() {
-  Shell::GetInstance()->system_tray_notifier()->RemoveAudioObserver(this);
-}
-
-bool TrayVolume::GetInitialVisibility() {
-  return IsAudioMuted();
-}
-
-views::View* TrayVolume::CreateDefaultView(user::LoginStatus status) {
-  volume_view_ = new tray::VolumeView;
-  is_default_view_ = true;
-  return volume_view_;
-}
-
-views::View* TrayVolume::CreateDetailedView(user::LoginStatus status) {
-  volume_view_ = new tray::VolumeView;
-  is_default_view_ = false;
-  return volume_view_;
-}
-
-void TrayVolume::DestroyDefaultView() {
-  if (is_default_view_)
-    volume_view_ = NULL;
-}
-
-void TrayVolume::DestroyDetailedView() {
-  if (!is_default_view_)
-    volume_view_ = NULL;
-}
-
-bool TrayVolume::ShouldHideArrow() const {
-  return true;
-}
-
-bool TrayVolume::ShouldShowLauncher() const {
-  return false;
-}
-
-void TrayVolume::OnVolumeChanged(float percent) {
-  if (tray_view())
-    tray_view()->SetVisible(GetInitialVisibility());
-
-  if (volume_view_) {
-    if (IsAudioMuted())
-      percent = 0.0;
-    volume_view_->SetVolumeLevel(percent);
-    SetDetailedViewCloseDelay(kTrayPopupAutoCloseDelayInSeconds);
-    return;
-  }
-  PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
-}
-
-void TrayVolume::OnMuteToggled() {
-  if (tray_view())
-      tray_view()->SetVisible(GetInitialVisibility());
-
-  if (volume_view_)
-    volume_view_->Update();
-  else
-    PopupDetailedView(kTrayPopupAutoCloseDelayInSeconds, false);
-}
-
-}  // namespace internal
-}  // namespace ash