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,
  56                      const views::CullSet& cull_set) OVERRIDE;
  57
  58   DISALLOW_COPY_AND_ASSIGN(SoundLevelIndicator);
  59 };
  60
  61 SoundLevelIndicator::SoundLevelIndicator() {}
  62
  63 SoundLevelIndicator::~SoundLevelIndicator() {}
  64
  65 void SoundLevelIndicator::Paint(gfx::Canvas* canvas,
  66                                 const views::CullSet& cull_set) {
  67   SkPaint paint;
  68   paint.setStyle(SkPaint::kFill_Style);
  69   paint.setColor(kSoundLevelIndicatorColor);
  70   paint.setAntiAlias(true);
  71   canvas->DrawCircle(bounds().CenterPoint(), width() / 2, paint);
  72 }
  73
  74 // MicButton is an image button with circular hit area.
  75 class MicButton : public views::ImageButton {
  76  public:
  77   explicit MicButton(views::ButtonListener* listener);
  78   virtual ~MicButton();
  79
  80  private:
  81   // Overridden from views::View:
  82   virtual bool HasHitTestMask() const OVERRIDE;
  83   virtual void GetHitTestMask(views::View::HitTestSource source,
  84                               gfx::Path* mask) const OVERRIDE;
  85
  86   DISALLOW_COPY_AND_ASSIGN(MicButton);
  87 };
  88
  89 MicButton::MicButton(views::ButtonListener* listener)
  90     : views::ImageButton(listener) {}
  91
  92 MicButton::~MicButton() {}
  93
  94 bool MicButton::HasHitTestMask() const {
  95   return true;
  96 }
  97
  98 void MicButton::GetHitTestMask(views::View::HitTestSource source,
  99                                gfx::Path* mask) const {
 100   // The mic button icon is a circle. |source| doesn't matter.
 101   gfx::Rect local_bounds = GetLocalBounds();
 102   int radius = local_bounds.width() / 2 + kIndicatorRadiusMinOffset;
 103   gfx::Point center = local_bounds.CenterPoint();
 104   center.set_y(center.y() + kIndicatorCenterOffsetY);
 105   mask->addCircle(SkIntToScalar(center.x()),
 106                   SkIntToScalar(center.y()),
 107                   SkIntToScalar(radius));
 108 }
 109
 110 }  // namespace
 111
 112 // static
 113
 114 SpeechView::SpeechView(AppListViewDelegate* delegate)
 115     : delegate_(delegate),
 116       logo_(NULL) {
 117   SetBorder(scoped_ptr<views::Border>(
 118       new views::ShadowBorder(kShadowBlur,
 119                               kShadowColor,
 120                               kShadowOffset,  // Vertical offset.
 121                               0)));
 122
 123   // To keep the painting order of the border and the background, this class
 124   // actually has a single child of 'container' which has white background and
 125   // contains all components.
 126   views::View* container = new views::View();
 127   container->set_background(
 128       views::Background::CreateSolidBackground(SK_ColorWHITE));
 129
 130   const gfx::ImageSkia& logo_image = delegate_->GetSpeechUI()->logo();
 131   if (!logo_image.isNull()) {
 132     logo_ = new views::ImageView();
 133     logo_->SetImage(&logo_image);
 134     container->AddChildView(logo_);
 135   }
 136
 137   indicator_ = new SoundLevelIndicator();
 138   indicator_->SetVisible(false);
 139   container->AddChildView(indicator_);
 140
 141   mic_button_ = new MicButton(this);
 142   container->AddChildView(mic_button_);
 143
 144   // TODO(mukai): use BoundedLabel to cap 2 lines.
 145   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 146   speech_result_ = new views::Label(
 147       base::string16(), bundle.GetFontList(ui::ResourceBundle::LargeFont));
 148   speech_result_->SetHorizontalAlignment(gfx::ALIGN_LEFT);
 149
 150   speech_result_->SetMultiLine(true);
 151   container->AddChildView(speech_result_);
 152
 153   AddChildView(container);
 154
 155   delegate_->GetSpeechUI()->AddObserver(this);
 156   indicator_animator_.reset(new views::BoundsAnimator(container));
 157   indicator_animator_->SetAnimationDuration(kIndicatorAnimationDuration);
 158   indicator_animator_->set_tween_type(gfx::Tween::LINEAR);
 159
 160   Reset();
 161 }
 162
 163 SpeechView::~SpeechView() {
 164   delegate_->GetSpeechUI()->RemoveObserver(this);
 165 }
 166
 167 void SpeechView::Reset() {
 168   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
 169   speech_result_->SetText(l10n_util::GetStringUTF16(
 170       IDS_APP_LIST_SPEECH_HINT_TEXT));
 171   speech_result_->SetEnabledColor(kHintTextColor);
 172   mic_button_->SetImage(views::Button::STATE_NORMAL,
 173                         bundle.GetImageSkiaNamed(IDR_APP_LIST_SPEECH_MIC_ON));
 174 }
 175
 176 int SpeechView::GetIndicatorRadius(uint8 level) {
 177   int radius_min = mic_button_->width() / 2 + kIndicatorRadiusMinOffset;
 178   int range = kIndicatorRadiusMax - radius_min;
 179   return level * range / kuint8max + radius_min;
 180 }
 181
 182 void SpeechView::Layout() {
 183   views::View* container = child_at(0);
 184   container->SetBoundsRect(GetContentsBounds());
 185
 186   // Because container is a pure View, this class should layout its children.
 187   const gfx::Rect contents_bounds = container->GetContentsBounds();
 188   if (logo_)
 189     logo_->SetBounds(kLogoMarginLeft, kLogoMarginTop, kLogoWidth, kLogoHeight);
 190   gfx::Size mic_size = mic_button_->GetPreferredSize();
 191   gfx::Point mic_origin(
 192       contents_bounds.right() - kMicButtonMargin - mic_size.width(),
 193       contents_bounds.y() + kMicButtonMargin);
 194   mic_button_->SetBoundsRect(gfx::Rect(mic_origin, mic_size));
 195
 196   int speech_width = contents_bounds.width() - kTextMargin * 2;
 197   speech_result_->SizeToFit(speech_width);
 198   int speech_height = speech_result_->GetHeightForWidth(speech_width);
 199   speech_result_->SetBounds(
 200       contents_bounds.x() + kTextMargin,
 201       contents_bounds.bottom() - kTextMargin - speech_height,
 202       speech_width,
 203       speech_height);
 204 }
 205
 206 gfx::Size SpeechView::GetPreferredSize() const {
 207   return gfx::Size(0, kSpeechViewMaxHeight);
 208 }
 209
 210 void SpeechView::ButtonPressed(views::Button* sender, const ui::Event& event) {
 211   delegate_->ToggleSpeechRecognition();
 212 }
 213
 214 void SpeechView::OnSpeechSoundLevelChanged(uint8 level) {
 215   if (!visible())
 216     return;
 217
 218   gfx::Point origin = mic_button_->bounds().CenterPoint();
 219   int radius = GetIndicatorRadius(level);
 220   origin.Offset(-radius, -radius + kIndicatorCenterOffsetY);
 221   gfx::Rect indicator_bounds =
 222       gfx::Rect(origin, gfx::Size(radius * 2, radius * 2));
 223   if (indicator_->visible()) {
 224     indicator_animator_->AnimateViewTo(indicator_, indicator_bounds);
 225   } else {
 226     indicator_->SetVisible(true);
 227     indicator_->SetBoundsRect(indicator_bounds);
 228   }
 229 }
 230
 231 void SpeechView::OnSpeechResult(const base::string16& result,
 232                                 bool is_final) {
 233   speech_result_->SetText(result);
 234   speech_result_->SetEnabledColor(kResultTextColor);
 235 }
 236
 237 void SpeechView::OnSpeechRecognitionStateChanged(
 238     SpeechRecognitionState new_state) {
 239   int resource_id = IDR_APP_LIST_SPEECH_MIC_OFF;
 240   if (new_state == SPEECH_RECOGNITION_RECOGNIZING)
 241     resource_id = IDR_APP_LIST_SPEECH_MIC_ON;
 242   else if (new_state == SPEECH_RECOGNITION_IN_SPEECH)
 243     resource_id = IDR_APP_LIST_SPEECH_MIC_RECORDING;
 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