src/ui/app_list/views/search_box_view.cc

   1 // Copyright (c) 2012 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/search_box_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "ui/app_list/app_list_model.h"
  10 #include "ui/app_list/app_list_switches.h"
  11 #include "ui/app_list/app_list_view_delegate.h"
  12 #include "ui/app_list/search_box_model.h"
  13 #include "ui/app_list/speech_ui_model.h"
  14 #include "ui/app_list/views/app_list_menu_views.h"
  15 #include "ui/app_list/views/search_box_view_delegate.h"
  16 #include "ui/base/resource/resource_bundle.h"
  17 #include "ui/events/event.h"
  18 #include "ui/gfx/canvas.h"
  19 #include "ui/resources/grit/ui_resources.h"
  20 #include "ui/views/border.h"
  21 #include "ui/views/controls/button/image_button.h"
  22 #include "ui/views/controls/button/menu_button.h"
  23 #include "ui/views/controls/image_view.h"
  24 #include "ui/views/controls/textfield/textfield.h"
  25 #include "ui/views/layout/box_layout.h"
  26
  27 namespace app_list {
  28
  29 namespace {
  30
  31 const int kPadding = 14;
  32 const int kPreferredWidth = 360;
  33 const int kPreferredHeight = 48;
  34
  35 const SkColor kHintTextColor = SkColorSetRGB(0xA0, 0xA0, 0xA0);
  36
  37 // Menu offset relative to the bottom-right corner of the menu button.
  38 const int kMenuYOffsetFromButton = -4;
  39 const int kMenuXOffsetFromButton = -7;
  40
  41 const int kBackgroundBorderWidth = 1;
  42 const int kBackgroundBorderBottomWidth = 1;
  43 const int kBackgroundBorderCornerRadius = 2;
  44 const SkColor kBackgroundBorderColor = SkColorSetRGB(0xEE, 0xEE, 0xEE);
  45 const SkColor kBackgroundBorderBottomColor = SkColorSetRGB(0xCC, 0xCC, 0xCC);
  46
  47 // A background that paints a solid white rounded rect with a thin grey border.
  48 class SearchBoxBackground : public views::Background {
  49  public:
  50   SearchBoxBackground() {}
  51   virtual ~SearchBoxBackground() {}
  52
  53  private:
  54   // views::Background overrides:
  55   virtual void Paint(gfx::Canvas* canvas, views::View* view) const OVERRIDE {
  56     gfx::Rect bounds = view->GetContentsBounds();
  57
  58     SkPaint paint;
  59     paint.setFlags(SkPaint::kAntiAlias_Flag);
  60     paint.setColor(kBackgroundBorderColor);
  61     canvas->DrawRoundRect(bounds, kBackgroundBorderCornerRadius, paint);
  62     bounds.Inset(kBackgroundBorderWidth,
  63                  kBackgroundBorderWidth,
  64                  kBackgroundBorderWidth,
  65                  0);
  66     paint.setColor(kBackgroundBorderBottomColor);
  67     canvas->DrawRoundRect(bounds, kBackgroundBorderCornerRadius, paint);
  68     bounds.Inset(0, 0, 0, kBackgroundBorderBottomWidth);
  69     paint.setColor(SK_ColorWHITE);
  70     canvas->DrawRoundRect(bounds, kBackgroundBorderCornerRadius, paint);
  71   }
  72
  73   DISALLOW_COPY_AND_ASSIGN(SearchBoxBackground);
  74 };
  75
  76 }  // namespace
  77
  78 SearchBoxView::SearchBoxView(SearchBoxViewDelegate* delegate,
  79                              AppListViewDelegate* view_delegate)
  80     : delegate_(delegate),
  81       view_delegate_(view_delegate),
  82       model_(NULL),
  83       icon_view_(NULL),
  84       speech_button_(NULL),
  85       search_box_(new views::Textfield),
  86       contents_view_(NULL) {
  87   if (switches::IsExperimentalAppListEnabled()) {
  88     set_background(new SearchBoxBackground());
  89   } else {
  90     icon_view_ = new views::ImageView;
  91     AddChildView(icon_view_);
  92   }
  93
  94   views::BoxLayout* layout =
  95       new views::BoxLayout(views::BoxLayout::kHorizontal,
  96                            kPadding,
  97                            0,
  98                            kPadding - views::Textfield::kTextPadding);
  99   SetLayoutManager(layout);
 100   layout->set_cross_axis_alignment(
 101       views::BoxLayout::CROSS_AXIS_ALIGNMENT_CENTER);
 102   layout->set_minimum_cross_axis_size(kPreferredHeight);
 103
 104   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 105
 106   search_box_->SetBorder(views::Border::NullBorder());
 107   search_box_->SetFontList(rb.GetFontList(ui::ResourceBundle::MediumFont));
 108   search_box_->set_placeholder_text_color(kHintTextColor);
 109   search_box_->set_controller(this);
 110   AddChildView(search_box_);
 111   layout->SetFlexForView(search_box_, 1);
 112
 113 #if !defined(OS_CHROMEOS)
 114   menu_button_ = new views::MenuButton(NULL, base::string16(), this, false);
 115   menu_button_->SetBorder(views::Border::NullBorder());
 116   menu_button_->SetImage(views::Button::STATE_NORMAL,
 117                          *rb.GetImageSkiaNamed(IDR_APP_LIST_TOOLS_NORMAL));
 118   menu_button_->SetImage(views::Button::STATE_HOVERED,
 119                          *rb.GetImageSkiaNamed(IDR_APP_LIST_TOOLS_HOVER));
 120   menu_button_->SetImage(views::Button::STATE_PRESSED,
 121                          *rb.GetImageSkiaNamed(IDR_APP_LIST_TOOLS_PRESSED));
 122   AddChildView(menu_button_);
 123 #endif
 124
 125   view_delegate_->GetSpeechUI()->AddObserver(this);
 126   ModelChanged();
 127 }
 128
 129 SearchBoxView::~SearchBoxView() {
 130   view_delegate_->GetSpeechUI()->RemoveObserver(this);
 131   model_->search_box()->RemoveObserver(this);
 132 }
 133
 134 void SearchBoxView::ModelChanged() {
 135   if (model_)
 136     model_->search_box()->RemoveObserver(this);
 137
 138   model_ = view_delegate_->GetModel();
 139   DCHECK(model_);
 140   model_->search_box()->AddObserver(this);
 141   IconChanged();
 142   SpeechRecognitionButtonPropChanged();
 143   HintTextChanged();
 144 }
 145
 146 bool SearchBoxView::HasSearch() const {
 147   return !search_box_->text().empty();
 148 }
 149
 150 void SearchBoxView::ClearSearch() {
 151   search_box_->SetText(base::string16());
 152   view_delegate_->AutoLaunchCanceled();
 153   // Updates model and fires query changed manually because SetText() above
 154   // does not generate ContentsChanged() notification.
 155   UpdateModel();
 156   NotifyQueryChanged();
 157 }
 158
 159 void SearchBoxView::InvalidateMenu() {
 160   menu_.reset();
 161 }
 162
 163 gfx::Size SearchBoxView::GetPreferredSize() const {
 164   return gfx::Size(kPreferredWidth, kPreferredHeight);
 165 }
 166
 167 bool SearchBoxView::OnMouseWheel(const ui::MouseWheelEvent& event) {
 168   if (contents_view_)
 169     return contents_view_->OnMouseWheel(event);
 170
 171   return false;
 172 }
 173
 174 void SearchBoxView::UpdateModel() {
 175   // Temporarily remove from observer to ignore notifications caused by us.
 176   model_->search_box()->RemoveObserver(this);
 177   model_->search_box()->SetText(search_box_->text());
 178   model_->search_box()->SetSelectionModel(search_box_->GetSelectionModel());
 179   model_->search_box()->AddObserver(this);
 180 }
 181
 182 void SearchBoxView::NotifyQueryChanged() {
 183   DCHECK(delegate_);
 184   delegate_->QueryChanged(this);
 185 }
 186
 187 void SearchBoxView::ContentsChanged(views::Textfield* sender,
 188                                     const base::string16& new_contents) {
 189   UpdateModel();
 190   view_delegate_->AutoLaunchCanceled();
 191   NotifyQueryChanged();
 192 }
 193
 194 bool SearchBoxView::HandleKeyEvent(views::Textfield* sender,
 195                                    const ui::KeyEvent& key_event) {
 196   bool handled = false;
 197   if (contents_view_ && contents_view_->visible())
 198     handled = contents_view_->OnKeyPressed(key_event);
 199
 200   return handled;
 201 }
 202
 203 void SearchBoxView::ButtonPressed(views::Button* sender,
 204                                   const ui::Event& event) {
 205   DCHECK(speech_button_ && sender == speech_button_);
 206   view_delegate_->ToggleSpeechRecognition();
 207 }
 208
 209 void SearchBoxView::OnMenuButtonClicked(View* source, const gfx::Point& point) {
 210   if (!menu_)
 211     menu_.reset(new AppListMenuViews(view_delegate_));
 212
 213   const gfx::Point menu_location =
 214       menu_button_->GetBoundsInScreen().bottom_right() +
 215       gfx::Vector2d(kMenuXOffsetFromButton, kMenuYOffsetFromButton);
 216   menu_->RunMenuAt(menu_button_, menu_location);
 217 }
 218
 219 void SearchBoxView::IconChanged() {
 220   if (icon_view_)
 221     icon_view_->SetImage(model_->search_box()->icon());
 222 }
 223
 224 void SearchBoxView::SpeechRecognitionButtonPropChanged() {
 225   const SearchBoxModel::SpeechButtonProperty* speech_button_prop =
 226       model_->search_box()->speech_button();
 227   if (speech_button_prop) {
 228     if (!speech_button_) {
 229       speech_button_ = new views::ImageButton(this);
 230       AddChildView(speech_button_);
 231     }
 232
 233     if (view_delegate_->GetSpeechUI()->state() ==
 234         SPEECH_RECOGNITION_HOTWORD_LISTENING) {
 235       speech_button_->SetImage(
 236           views::Button::STATE_NORMAL, &speech_button_prop->on_icon);
 237       speech_button_->SetTooltipText(speech_button_prop->on_tooltip);
 238     } else {
 239       speech_button_->SetImage(
 240           views::Button::STATE_NORMAL, &speech_button_prop->off_icon);
 241       speech_button_->SetTooltipText(speech_button_prop->off_tooltip);
 242     }
 243   } else {
 244     if (speech_button_) {
 245       // Deleting a view will detach it from its parent.
 246       delete speech_button_;
 247       speech_button_ = NULL;
 248     }
 249   }
 250 }
 251
 252 void SearchBoxView::HintTextChanged() {
 253   search_box_->set_placeholder_text(model_->search_box()->hint_text());
 254 }
 255
 256 void SearchBoxView::SelectionModelChanged() {
 257   search_box_->SelectSelectionModel(model_->search_box()->selection_model());
 258 }
 259
 260 void SearchBoxView::TextChanged() {
 261   search_box_->SetText(model_->search_box()->text());
 262   NotifyQueryChanged();
 263 }
 264
 265 void SearchBoxView::OnSpeechRecognitionStateChanged(
 266     SpeechRecognitionState new_state) {
 267   SpeechRecognitionButtonPropChanged();
 268   SchedulePaint();
 269 }
 270
 271 }  // namespace app_list