src/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 "grit/ui_resources.h"
   9 #include "grit/ui_strings.h"
  10 #include "third_party/skia/include/core/SkPath.h"
  11 #include "ui/app_list/app_list_model.h"
  12 #include "ui/app_list/app_list_view_delegate.h"
  13 #include "ui/app_list/speech_ui_model.h"
  14 #include "ui/base/l10n/l10n_util.h"
  15 #include "ui/base/resource/resource_bundle.h"
  16 #include "ui/gfx/canvas.h"
  17 #include "ui/gfx/path.h"
  18 #include "ui/views/animation/bounds_animator.h"
  19 #include "ui/views/background.h"
  20 #include "ui/views/controls/button/image_button.h"
  21 #include "ui/views/controls/image_view.h"
  22 #include "ui/views/controls/label.h"
  23 #include "ui/views/layout/fill_layout.h"
  24 #include "ui/views/shadow_border.h"
  25
  26 namespace app_list {
  27
  28 namespace {
  29
  30 const int kShadowOffset = 1;
  31 const int kShadowBlur = 4;
  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 kShadowColor = SkColorSetARGB(0.3 * 255, 0, 0, 0);
  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   virtual ~SoundLevelIndicator();
  52
  53  private:
  54   // Overridden from views::View:
  55   virtual void Paint(gfx::Canvas* canvas) OVERRIDE;
  56
  57   DISALLOW_COPY_AND_ASSIGN(SoundLevelIndicator);
  58 };
  59
  60 SoundLevelIndicator::SoundLevelIndicator() {}
  61
  62 SoundLevelIndicator::~SoundLevelIndicator() {}
  63
  64 void SoundLevelIndicator::Paint(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 circular hit area.
  73 class MicButton : public views::ImageButton {
  74  public:
  75   explicit MicButton(views::ButtonListener* listener);
  76   virtual ~MicButton();
  77
  78  private:
  79   // Overridden from views::View:
  80   virtual bool HasHitTestMask() const OVERRIDE;
  81   virtual void GetHitTestMask(views::View::HitTestSource source,
  82                               gfx::Path* mask) const OVERRIDE;
  83
  84   DISALLOW_COPY_AND_ASSIGN(MicButton);
  85 };
  86
  87 MicButton::MicButton(views::ButtonListener* listener)
  88     : views::ImageButton(listener) {}
  89
  90 MicButton::~MicButton() {}
  91
  92 bool MicButton::HasHitTestMask() const {
  93   return true;
  94 }
  95
  96 void MicButton::GetHitTestMask(views::View::HitTestSource source,
  97                                gfx::Path* mask) const {
  98   // The mic button icon is a circle. |source| doesn't matter.
  99   gfx::Rect local_bounds = GetLocalBounds();
 100   int radius = local_bounds.width() / 2 + kIndicatorRadiusMinOffset;
 101   gfx::Point center = local_bounds.CenterPoint();
 102   center.set_y(center.y() + kIndicatorCenterOffsetY);
 103   mask->addCircle(SkIntToScalar(center.x()),
 104                   SkIntToScalar(center.y()),
 105                   SkIntToScalar(radius));
 106 }
 107
 108 }  // namespace
 109
 110 // static
 111
 112 SpeechView::SpeechView(AppListViewDelegate* delegate)
 113     : delegate_(delegate),
 114       logo_(NULL) {
 115   SetBorder(scoped_ptr<views::Border>(
 116       new views::ShadowBorder(kShadowBlur,
 117                               kShadowColor,
 118                               kShadowOffset,  // Vertical offset.
 119                               0)));
 120
 121   // To keep the painting order of the border and the background, this class
 122   // actually has a single child of 'container' which has white background and
 123   // contains all components.
 124   views::View* container = new views::View();
 125   container->set_background(
 126       views::Background::CreateSolidBackground(SK_ColorWHITE));
 127
 128   const gfx::ImageSkia& logo_image = delegate_->GetSpeechUI()->logo();
 129   if (!logo_image.isNull()) {
 130     logo_ = new views::ImageView();
 131     logo_->SetImage(&logo_image);
 132     container->AddChildView(logo_);
 133   }
 134
 135   indicator_ = new SoundLevelIndicator();
 136   indicator_->SetVisible(false);
 137   container->AddChildView(indicator_);
 138
 139   mic_button_ = new MicButton(this);
 140   container->AddChildView(mic_button_);
 141
 142   // TODO(mukai): use BoundedLabel to cap 2 lines.
 143   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 144   speech_result_ = new views::Label(
 145       base::string16(), bundle.GetFontList(ui::ResourceBundle::LargeFont));
 146   speech_result_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 147
 148   speech_result_->SetMultiLine(true);
 149   container->AddChildView(speech_result_);
 150
 151   AddChildView(container);
 152
 153   delegate_->GetSpeechUI()->AddObserver(this);
 154   indicator_animator_.reset(new views::BoundsAnimator(container));
 155   indicator_animator_->SetAnimationDuration(kIndicatorAnimationDuration);
 156   indicator_animator_->set_tween_type(gfx::Tween::LINEAR);
 157
 158   Reset();
 159 }
 160
 161 SpeechView::~SpeechView() {
 162   delegate_->GetSpeechUI()->RemoveObserver(this);
 163 }
 164
 165 void SpeechView::Reset() {
 166   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 167   speech_result_->SetText(l10n_util::GetStringUTF16(
 168       IDS_APP_LIST_SPEECH_HINT_TEXT));
 169   speech_result_->SetEnabledColor(kHintTextColor);
 170   mic_button_->SetImage(views::Button::STATE_NORMAL,
 171                         bundle.GetImageSkiaNamed(IDR_APP_LIST_SPEECH_MIC_ON));
 172 }
 173
 174 int SpeechView::GetIndicatorRadius(uint8 level) {
 175   int radius_min = mic_button_->width() / 2 + kIndicatorRadiusMinOffset;
 176   int range = kIndicatorRadiusMax - radius_min;
 177   return level * range / kuint8max + radius_min;
 178 }
 179
 180 void SpeechView::Layout() {
 181   views::View* container = child_at(0);
 182   container->SetBoundsRect(GetContentsBounds());
 183
 184   // Because container is a pure View, this class should layout its children.
 185   const gfx::Rect contents_bounds = container->GetContentsBounds();
 186   if (logo_)
 187     logo_->SetBounds(kLogoMarginLeft, kLogoMarginTop, kLogoWidth, kLogoHeight);
 188   gfx::Size mic_size = mic_button_->GetPreferredSize();
 189   gfx::Point mic_origin(
 190       contents_bounds.right() - kMicButtonMargin - mic_size.width(),
 191       contents_bounds.y() + kMicButtonMargin);
 192   mic_button_->SetBoundsRect(gfx::Rect(mic_origin, mic_size));
 193
 194   int speech_width = contents_bounds.width() - kTextMargin * 2;
 195   speech_result_->SizeToFit(speech_width);
 196   int speech_height = speech_result_->GetHeightForWidth(speech_width);
 197   speech_result_->SetBounds(
 198       contents_bounds.x() + kTextMargin,
 199       contents_bounds.bottom() - kTextMargin - speech_height,
 200       speech_width,
 201       speech_height);
 202 }
 203
 204 gfx::Size SpeechView::GetPreferredSize() {
 205   return gfx::Size(0, kSpeechViewMaxHeight);
 206 }
 207
 208 void SpeechView::ButtonPressed(views::Button* sender, const ui::Event& event) {
 209   delegate_->ToggleSpeechRecognition();
 210 }
 211
 212 void SpeechView::OnSpeechSoundLevelChanged(uint8 level) {
 213   if (!visible())
 214     return;
 215
 216   gfx::Point origin = mic_button_->bounds().CenterPoint();
 217   int radius = GetIndicatorRadius(level);
 218   origin.Offset(-radius, -radius + kIndicatorCenterOffsetY);
 219   gfx::Rect indicator_bounds =
 220       gfx::Rect(origin, gfx::Size(radius * 2, radius * 2));
 221   if (indicator_->visible()) {
 222     indicator_animator_->AnimateViewTo(indicator_, indicator_bounds);
 223   } else {
 224     indicator_->SetVisible(true);
 225     indicator_->SetBoundsRect(indicator_bounds);
 226   }
 227 }
 228
 229 void SpeechView::OnSpeechResult(const base::string16& result,
 230                                 bool is_final) {
 231   speech_result_->SetText(result);
 232   speech_result_->SetEnabledColor(kResultTextColor);
 233 }
 234
 235 void SpeechView::OnSpeechRecognitionStateChanged(
 236     SpeechRecognitionState new_state) {
 237   int resource_id = IDR_APP_LIST_SPEECH_MIC_OFF;
 238   if (new_state == SPEECH_RECOGNITION_RECOGNIZING)
 239     resource_id = IDR_APP_LIST_SPEECH_MIC_ON;
 240   else if (new_state == SPEECH_RECOGNITION_IN_SPEECH)
 241     resource_id = IDR_APP_LIST_SPEECH_MIC_RECORDING;
 242
 243   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 244   mic_button_->SetImage(views::Button::STATE_NORMAL,
 245                         bundle.GetImageSkiaNamed(resource_id));
 246 }
 247
 248 }  // namespace app_list