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/resources/grit/ui_resources.h"
  18 #include "ui/strings/grit/ui_strings.h"
  19 #include "ui/views/animation/bounds_animator.h"
  20 #include "ui/views/background.h"
  21 #include "ui/views/controls/button/image_button.h"
  22 #include "ui/views/controls/image_view.h"
  23 #include "ui/views/controls/label.h"
  24 #include "ui/views/layout/fill_layout.h"
  25 #include "ui/views/masked_targeter_delegate.h"
  26 #include "ui/views/shadow_border.h"
  27
  28 namespace app_list {
  29
  30 namespace {
  31
  32 const int kSpeechViewMaxHeight = 300;
  33 const int kMicButtonMargin = 12;
  34 const int kTextMargin = 32;
  35 const int kLogoMarginLeft = 30;
  36 const int kLogoMarginTop = 28;
  37 const int kLogoWidth = 104;
  38 const int kLogoHeight = 36;
  39 const int kIndicatorCenterOffsetY = -1;
  40 const int kIndicatorRadiusMinOffset = -3;
  41 const int kIndicatorRadiusMax = 100;
  42 const int kIndicatorAnimationDuration = 100;
  43 const SkColor kHintTextColor = SkColorSetRGB(119, 119, 119);
  44 const SkColor kResultTextColor = SkColorSetRGB(178, 178, 178);
  45 const SkColor kSoundLevelIndicatorColor = SkColorSetRGB(219, 219, 219);
  46
  47 class SoundLevelIndicator : public views::View {
  48  public:
  49   SoundLevelIndicator();
  50   ~SoundLevelIndicator() override;
  51
  52  private:
  53   // Overridden from views::View:
  54   void OnPaint(gfx::Canvas* canvas) override;
  55
  56   DISALLOW_COPY_AND_ASSIGN(SoundLevelIndicator);
  57 };
  58
  59 SoundLevelIndicator::SoundLevelIndicator() {}
  60
  61 SoundLevelIndicator::~SoundLevelIndicator() {}
  62
  63 void SoundLevelIndicator::OnPaint(gfx::Canvas* canvas) {
  64   SkPaint paint;
  65   paint.setStyle(SkPaint::kFill_Style);
  66   paint.setColor(kSoundLevelIndicatorColor);
  67   paint.setAntiAlias(true);
  68   canvas->DrawCircle(bounds().CenterPoint(), width() / 2, paint);
  69 }
  70
  71 // MicButton is an image button with a circular hit test mask.
  72 class MicButton : public views::ImageButton,
  73                   public views::MaskedTargeterDelegate {
  74  public:
  75   explicit MicButton(views::ButtonListener* listener);
  76   ~MicButton() override;
  77
  78  private:
  79   // views::MaskedTargeterDelegate:
  80   bool GetHitTestMask(gfx::Path* mask) const override;
  81
  82   DISALLOW_COPY_AND_ASSIGN(MicButton);
  83 };
  84
  85 MicButton::MicButton(views::ButtonListener* listener)
  86     : views::ImageButton(listener) {}
  87
  88 MicButton::~MicButton() {}
  89
  90 bool MicButton::GetHitTestMask(gfx::Path* mask) const {
  91   DCHECK(mask);
  92
  93   // The mic button icon is a circle.
  94   gfx::Rect local_bounds = GetLocalBounds();
  95   int radius = local_bounds.width() / 2 + kIndicatorRadiusMinOffset;
  96   gfx::Point center = local_bounds.CenterPoint();
  97   center.set_y(center.y() + kIndicatorCenterOffsetY);
  98   mask->addCircle(SkIntToScalar(center.x()),
  99                   SkIntToScalar(center.y()),
 100                   SkIntToScalar(radius));
 101   return true;
 102 }
 103
 104 }  // namespace
 105
 106 // static
 107
 108 SpeechView::SpeechView(AppListViewDelegate* delegate)
 109     : delegate_(delegate),
 110       logo_(NULL) {
 111   SetBorder(scoped_ptr<views::Border>(
 112       new views::ShadowBorder(kCardShadowBlur, kCardShadowColor,
 113                               kCardShadowYOffset,  // Vertical offset.
 114                               0)));
 115
 116   // To keep the painting order of the border and the background, this class
 117   // actually has a single child of 'container' which has white background and
 118   // contains all components.
 119   views::View* container = new views::View();
 120   container->set_background(
 121       views::Background::CreateSolidBackground(SK_ColorWHITE));
 122
 123   const gfx::ImageSkia& logo_image = delegate_->GetSpeechUI()->logo();
 124   if (!logo_image.isNull()) {
 125     logo_ = new views::ImageView();
 126     logo_->SetImage(&logo_image);
 127     container->AddChildView(logo_);
 128   }
 129
 130   indicator_ = new SoundLevelIndicator();
 131   indicator_->SetVisible(false);
 132   container->AddChildView(indicator_);
 133
 134   MicButton* mic_button = new MicButton(this);
 135   mic_button_ = mic_button;
 136   container->AddChildView(mic_button_);
 137   mic_button_->SetEventTargeter(
 138       scoped_ptr<views::ViewTargeter>(new views::ViewTargeter(mic_button)));
 139
 140   // TODO(mukai): use BoundedLabel to cap 2 lines.
 141   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 142   speech_result_ = new views::Label(
 143       base::string16(), bundle.GetFontList(ui::ResourceBundle::LargeFont));
 144   speech_result_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 145
 146   speech_result_->SetMultiLine(true);
 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   speech_result_->SizeToFit(speech_width);
 189   int speech_height = speech_result_->GetHeightForWidth(speech_width);
 190   speech_result_->SetBounds(
 191       contents_bounds.x() + kTextMargin,
 192       contents_bounds.bottom() - kTextMargin - speech_height,
 193       speech_width,
 194       speech_height);
 195 }
 196
 197 gfx::Size SpeechView::GetPreferredSize() const {
 198   return gfx::Size(0, kSpeechViewMaxHeight);
 199 }
 200
 201 void SpeechView::ButtonPressed(views::Button* sender, const ui::Event& event) {
 202   delegate_->ToggleSpeechRecognition();
 203 }
 204
 205 void SpeechView::OnSpeechSoundLevelChanged(uint8 level) {
 206   if (!visible() ||
 207       delegate_->GetSpeechUI()->state() == SPEECH_RECOGNITION_NETWORK_ERROR)
 208     return;
 209
 210   gfx::Point origin = mic_button_->bounds().CenterPoint();
 211   int radius = GetIndicatorRadius(level);
 212   origin.Offset(-radius, -radius + kIndicatorCenterOffsetY);
 213   gfx::Rect indicator_bounds =
 214       gfx::Rect(origin, gfx::Size(radius * 2, radius * 2));
 215   if (indicator_->visible()) {
 216     indicator_animator_->AnimateViewTo(indicator_, indicator_bounds);
 217   } else {
 218     indicator_->SetVisible(true);
 219     indicator_->SetBoundsRect(indicator_bounds);
 220   }
 221 }
 222
 223 void SpeechView::OnSpeechResult(const base::string16& result,
 224                                 bool is_final) {
 225   speech_result_->SetText(result);
 226   speech_result_->SetEnabledColor(kResultTextColor);
 227 }
 228
 229 void SpeechView::OnSpeechRecognitionStateChanged(
 230     SpeechRecognitionState new_state) {
 231   int resource_id = IDR_APP_LIST_SPEECH_MIC_OFF;
 232   if (new_state == SPEECH_RECOGNITION_RECOGNIZING)
 233     resource_id = IDR_APP_LIST_SPEECH_MIC_ON;
 234   else if (new_state == SPEECH_RECOGNITION_IN_SPEECH)
 235     resource_id = IDR_APP_LIST_SPEECH_MIC_RECORDING;
 236
 237   int text_resource_id = IDS_APP_LIST_SPEECH_HINT_TEXT;
 238
 239   if (new_state == SPEECH_RECOGNITION_NETWORK_ERROR) {
 240     text_resource_id = IDS_APP_LIST_SPEECH_NETWORK_ERROR_HINT_TEXT;
 241     indicator_->SetVisible(false);
 242   }
 243   speech_result_->SetText(l10n_util::GetStringUTF16(text_resource_id));
 244   speech_result_->SetEnabledColor(kHintTextColor);
 245
 246   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 247   mic_button_->SetImage(views::Button::STATE_NORMAL,
 248                         bundle.GetImageSkiaNamed(resource_id));
 249 }
 250
 251 }  // namespace app_list