ui/app_list/views/speech_view.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/app_list/views/speech_view.h"
   6
   7 #include "base/strings/utf_string_conversions.h"
   8 #include "third_party/skia/include/core/SkPath.h"
   9 #include "ui/app_list/app_list_constants.h"
  10 #include "ui/app_list/app_list_model.h"
  11 #include "ui/app_list/app_list_view_delegate.h"
  12 #include "ui/app_list/speech_ui_model.h"
  13 #include "ui/base/l10n/l10n_util.h"
  14 #include "ui/base/resource/resource_bundle.h"
  15 #include "ui/gfx/canvas.h"
  16 #include "ui/gfx/path.h"
  17 #include "ui/gfx/shadow_value.h"
  18 #include "ui/resources/grit/ui_resources.h"
  19 #include "ui/strings/grit/ui_strings.h"
  20 #include "ui/views/animation/bounds_animator.h"
  21 #include "ui/views/background.h"
  22 #include "ui/views/controls/button/image_button.h"
  23 #include "ui/views/controls/image_view.h"
  24 #include "ui/views/controls/label.h"
  25 #include "ui/views/layout/fill_layout.h"
  26 #include "ui/views/masked_targeter_delegate.h"
  27 #include "ui/views/shadow_border.h"
  28
  29 namespace app_list {
  30
  31 namespace {
  32
  33 const int kSpeechViewMaxHeight = 300;
  34 const int kMicButtonMargin = 12;
  35 const int kTextMargin = 32;
  36 const int kLogoMarginLeft = 30;
  37 const int kLogoMarginTop = 28;
  38 const int kLogoWidth = 104;
  39 const int kLogoHeight = 36;
  40 const int kIndicatorCenterOffsetY = -1;
  41 const int kIndicatorRadiusMinOffset = -3;
  42 const int kIndicatorRadiusMax = 100;
  43 const int kIndicatorAnimationDuration = 100;
  44 const SkColor kHintTextColor = SkColorSetRGB(119, 119, 119);
  45 const SkColor kResultTextColor = SkColorSetRGB(178, 178, 178);
  46 const SkColor kSoundLevelIndicatorColor = SkColorSetRGB(219, 219, 219);
  47
  48 class SoundLevelIndicator : public views::View {
  49  public:
  50   SoundLevelIndicator();
  51   ~SoundLevelIndicator() override;
  52
  53  private:
  54   // Overridden from views::View:
  55   void OnPaint(gfx::Canvas* canvas) override;
  56
  57   DISALLOW_COPY_AND_ASSIGN(SoundLevelIndicator);
  58 };
  59
  60 SoundLevelIndicator::SoundLevelIndicator() {}
  61
  62 SoundLevelIndicator::~SoundLevelIndicator() {}
  63
  64 void SoundLevelIndicator::OnPaint(gfx::Canvas* canvas) {
  65   SkPaint paint;
  66   paint.setStyle(SkPaint::kFill_Style);
  67   paint.setColor(kSoundLevelIndicatorColor);
  68   paint.setAntiAlias(true);
  69   canvas->DrawCircle(bounds().CenterPoint(), width() / 2, paint);
  70 }
  71
  72 // MicButton is an image button with a circular hit test mask.
  73 class MicButton : public views::ImageButton,
  74                   public views::MaskedTargeterDelegate {
  75  public:
  76   explicit MicButton(views::ButtonListener* listener);
  77   ~MicButton() override;
  78
  79  private:
  80   // views::MaskedTargeterDelegate:
  81   bool GetHitTestMask(gfx::Path* mask) const override;
  82
  83   DISALLOW_COPY_AND_ASSIGN(MicButton);
  84 };
  85
  86 MicButton::MicButton(views::ButtonListener* listener)
  87     : views::ImageButton(listener) {}
  88
  89 MicButton::~MicButton() {}
  90
  91 bool MicButton::GetHitTestMask(gfx::Path* mask) const {
  92   DCHECK(mask);
  93
  94   // The mic button icon is a circle.
  95   gfx::Rect local_bounds = GetLocalBounds();
  96   int radius = local_bounds.width() / 2 + kIndicatorRadiusMinOffset;
  97   gfx::Point center = local_bounds.CenterPoint();
  98   center.set_y(center.y() + kIndicatorCenterOffsetY);
  99   mask->addCircle(SkIntToScalar(center.x()),
 100                   SkIntToScalar(center.y()),
 101                   SkIntToScalar(radius));
 102   return true;
 103 }
 104
 105 }  // namespace
 106
 107 // static
 108
 109 SpeechView::SpeechView(AppListViewDelegate* delegate)
 110     : delegate_(delegate),
 111       logo_(NULL) {
 112   SetBorder(scoped_ptr<views::Border>(
 113       new views::ShadowBorder(GetShadowForZHeight(1))));
 114
 115   // To keep the painting order of the border and the background, this class
 116   // actually has a single child of 'container' which has white background and
 117   // contains all components.
 118   views::View* container = new views::View();
 119   container->set_background(
 120       views::Background::CreateSolidBackground(SK_ColorWHITE));
 121
 122   const gfx::ImageSkia& logo_image = delegate_->GetSpeechUI()->logo();
 123   if (!logo_image.isNull()) {
 124     logo_ = new views::ImageView();
 125     logo_->SetImage(&logo_image);
 126     container->AddChildView(logo_);
 127   }
 128
 129   indicator_ = new SoundLevelIndicator();
 130   indicator_->SetVisible(false);
 131   container->AddChildView(indicator_);
 132
 133   MicButton* mic_button = new MicButton(this);
 134   mic_button_ = mic_button;
 135   container->AddChildView(mic_button_);
 136   mic_button_->SetEventTargeter(
 137       scoped_ptr<views::ViewTargeter>(new views::ViewTargeter(mic_button)));
 138
 139   // TODO(mukai): use BoundedLabel to cap 2 lines.
 140   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 141   // TODO(calamity): make this label multiline once Label caches its RenderText.
 142   // See http://crbug.com/450791.
 143   speech_result_ = new views::Label(
 144       base::string16(), bundle.GetFontList(ui::ResourceBundle::LargeFont));
 145   speech_result_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 146
 147   container->AddChildView(speech_result_);
 148
 149   AddChildView(container);
 150
 151   delegate_->GetSpeechUI()->AddObserver(this);
 152   indicator_animator_.reset(new views::BoundsAnimator(container));
 153   indicator_animator_->SetAnimationDuration(kIndicatorAnimationDuration);
 154   indicator_animator_->set_tween_type(gfx::Tween::LINEAR);
 155
 156   Reset();
 157 }
 158
 159 SpeechView::~SpeechView() {
 160   delegate_->GetSpeechUI()->RemoveObserver(this);
 161 }
 162
 163 void SpeechView::Reset() {
 164   OnSpeechRecognitionStateChanged(delegate_->GetSpeechUI()->state());
 165 }
 166
 167 int SpeechView::GetIndicatorRadius(uint8 level) {
 168   int radius_min = mic_button_->width() / 2 + kIndicatorRadiusMinOffset;
 169   int range = kIndicatorRadiusMax - radius_min;
 170   return level * range / kuint8max + radius_min;
 171 }
 172
 173 void SpeechView::Layout() {
 174   views::View* container = child_at(0);
 175   container->SetBoundsRect(GetContentsBounds());
 176
 177   // Because container is a pure View, this class should layout its children.
 178   const gfx::Rect contents_bounds = container->GetContentsBounds();
 179   if (logo_)
 180     logo_->SetBounds(kLogoMarginLeft, kLogoMarginTop, kLogoWidth, kLogoHeight);
 181   gfx::Size mic_size = mic_button_->GetPreferredSize();
 182   gfx::Point mic_origin(
 183       contents_bounds.right() - kMicButtonMargin - mic_size.width(),
 184       contents_bounds.y() + kMicButtonMargin);
 185   mic_button_->SetBoundsRect(gfx::Rect(mic_origin, mic_size));
 186
 187   int speech_width = contents_bounds.width() - kTextMargin * 2;
 188   int speech_height = speech_result_->GetHeightForWidth(speech_width);
 189   speech_result_->SetBounds(
 190       contents_bounds.x() + kTextMargin,
 191       contents_bounds.bottom() - kTextMargin - speech_height,
 192       speech_width,
 193       speech_height);
 194 }
 195
 196 gfx::Size SpeechView::GetPreferredSize() const {
 197   return gfx::Size(0, kSpeechViewMaxHeight);
 198 }
 199
 200 void SpeechView::ButtonPressed(views::Button* sender, const ui::Event& event) {
 201   delegate_->ToggleSpeechRecognition();
 202 }
 203
 204 void SpeechView::OnSpeechSoundLevelChanged(uint8 level) {
 205   if (!visible() ||
 206       delegate_->GetSpeechUI()->state() == SPEECH_RECOGNITION_NETWORK_ERROR)
 207     return;
 208
 209   gfx::Point origin = mic_button_->bounds().CenterPoint();
 210   int radius = GetIndicatorRadius(level);
 211   origin.Offset(-radius, -radius + kIndicatorCenterOffsetY);
 212   gfx::Rect indicator_bounds =
 213       gfx::Rect(origin, gfx::Size(radius * 2, radius * 2));
 214   if (indicator_->visible()) {
 215     indicator_animator_->AnimateViewTo(indicator_, indicator_bounds);
 216   } else {
 217     indicator_->SetVisible(true);
 218     indicator_->SetBoundsRect(indicator_bounds);
 219   }
 220 }
 221
 222 void SpeechView::OnSpeechResult(const base::string16& result,
 223                                 bool is_final) {
 224   speech_result_->SetText(result);
 225   speech_result_->SetEnabledColor(kResultTextColor);
 226 }
 227
 228 void SpeechView::OnSpeechRecognitionStateChanged(
 229     SpeechRecognitionState new_state) {
 230   int resource_id = IDR_APP_LIST_SPEECH_MIC_OFF;
 231   if (new_state == SPEECH_RECOGNITION_RECOGNIZING)
 232     resource_id = IDR_APP_LIST_SPEECH_MIC_ON;
 233   else if (new_state == SPEECH_RECOGNITION_IN_SPEECH)
 234     resource_id = IDR_APP_LIST_SPEECH_MIC_RECORDING;
 235
 236   int text_resource_id = IDS_APP_LIST_SPEECH_HINT_TEXT;
 237
 238   if (new_state == SPEECH_RECOGNITION_NETWORK_ERROR) {
 239     text_resource_id = IDS_APP_LIST_SPEECH_NETWORK_ERROR_HINT_TEXT;
 240     indicator_->SetVisible(false);
 241   }
 242   speech_result_->SetText(l10n_util::GetStringUTF16(text_resource_id));
 243   speech_result_->SetEnabledColor(kHintTextColor);
 244
 245   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 246   mic_button_->SetImage(views::Button::STATE_NORMAL,
 247                         bundle.GetImageSkiaNamed(resource_id));
 248 }
 249
 250 }  // namespace app_list