Make views::Label and views::Link auto-color themselves to be readable over their background colo...

chrome/browser/ui/views/first_run_search_engine_view.cc

 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/views/first_run_search_engine_view.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
 #include "base/i18n/rtl.h"
 #include "base/rand_util.h"
 #include "base/time.h"
 #include "base/utf_string_conversions.h"
 #include "chrome/browser/first_run/first_run.h"
 #include "chrome/browser/first_run/first_run_dialog.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/search_engine_type.h"
 #include "chrome/browser/search_engines/template_url.h"
 #include "chrome/browser/search_engines/template_url_service.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
+#include "chrome/browser/themes/theme_service.h"
 #include "grit/chromium_strings.h"
 #include "grit/generated_resources.h"
 #include "grit/google_chrome_strings.h"
 #include "grit/locale_settings.h"
 #include "grit/theme_resources.h"
 #include "ui/base/accessibility/accessible_view_state.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
 #include "ui/gfx/canvas.h"
 #include "ui/gfx/font.h"
@@ skipping 64 matching lines @@
         ResourceBundle::GetSharedInstance().GetBitmapNamed(logo_id);
     logo_image->SetImage(logo_bmp);
     if (use_small_logos)
       logo_image->SetImageSize(gfx::Size(kSmallLogoWidth, kSmallLogoHeight));
     // Tooltip text provides accessibility for low-vision users.
     logo_image->SetTooltipText(WideToUTF16Hack(search_engine_->short_name()));
     choice_view_ = logo_image;
   } else {
     // No logo -- we must show a text label.
     views::Label* logo_label = new views::Label(search_engine_->short_name());
-    logo_label->SetColor(SK_ColorDKGRAY);
+    logo_label->SetBackgroundColor(SK_ColorWHITE);
+    logo_label->SetEnabledColor(SK_ColorDKGRAY);
     logo_label->SetFont(logo_label->font().DeriveFont(3, gfx::Font::BOLD));
     logo_label->SetHorizontalAlignment(views::Label::ALIGN_CENTER);
     logo_label->SetTooltipText(WideToUTF16Hack(search_engine_->short_name()));
     logo_label->SetMultiLine(true);
     logo_label->SizeToFit(kSmallLogoWidth);
     choice_view_ = logo_label;
   }
 
   // The accessible name of the button provides accessibility for
   // screenreaders. It uses the browser name rather than the text of the
@@ skipping 16 matching lines @@
   } else {
     return choice_view_->GetPreferredSize().height();
   }
 }
 
 void SearchEngineChoice::SetChoiceViewBounds(int x, int y, int width,
                                              int height) {
   choice_view_->SetBounds(x, y, width, height);
 }
 
-FirstRunSearchEngineView::FirstRunSearchEngineView(
-    Profile* profile, bool randomize)
+FirstRunSearchEngineView::FirstRunSearchEngineView(Profile* profile,
+                                                   bool randomize)
     : background_image_(NULL),
-      profile_(profile),
+      template_url_service_(TemplateURLServiceFactory::GetForProfile(profile)),
       text_direction_is_rtl_(base::i18n::IsRTL()),
+      template_url_service_loaded_(false),
+      added_to_view_hierarchy_(false),
       randomize_(randomize) {
   // Don't show ourselves until all the search engines have loaded from
   // the profile -- otherwise we have nothing to show.
   SetVisible(false);
 
   // Start loading the search engines for the given profile.
-  search_engines_model_ = TemplateURLServiceFactory::GetForProfile(profile_);
-  if (search_engines_model_) {
-    DCHECK(!search_engines_model_->loaded());
-    search_engines_model_->AddObserver(this);
-    search_engines_model_->Load();
-  } else {
-    NOTREACHED();
-  }
-  SetupControls();
+  DCHECK(template_url_service_);
+  DCHECK(!template_url_service_->loaded());
+  template_url_service_->AddObserver(this);
+  template_url_service_->Load();
 }
 
 FirstRunSearchEngineView::~FirstRunSearchEngineView() {
-  search_engines_model_->RemoveObserver(this);
+  template_url_service_->RemoveObserver(this);
 }
 
 string16 FirstRunSearchEngineView::GetWindowTitle() const {
   return l10n_util::GetStringUTF16(IDS_FIRSTRUN_DLG_TITLE);
 }
 
 void FirstRunSearchEngineView::ButtonPressed(views::Button* sender,
                                              const views::Event& event) {
   SearchEngineChoice* choice = static_cast<SearchEngineChoice*>(sender);
-  TemplateURLService* template_url_service =
-      TemplateURLServiceFactory::GetForProfile(profile_);
-  DCHECK(template_url_service);
-  template_url_service->SetSearchEngineDialogSlot(choice->slot());
+  DCHECK(template_url_service_);
+  template_url_service_->SetSearchEngineDialogSlot(choice->slot());
   const TemplateURL* default_search = choice->GetSearchEngine();
   if (default_search)
-    template_url_service->SetDefaultSearchProvider(default_search);
+    template_url_service_->SetDefaultSearchProvider(default_search);
 
   MessageLoop::current()->Quit();
 }
 
 void FirstRunSearchEngineView::OnPaint(gfx::Canvas* canvas) {
   // Fill in behind the background image with the standard gray toolbar color.
-  canvas->FillRectInt(SkColorSetRGB(237, 238, 237), 0, 0, width(),
-                      background_image_->height());
+  canvas->FillRectInt(GetThemeProvider()->GetColor(ThemeService::COLOR_TOOLBAR),
+                      0, 0, width(), background_image_->height());
   // The rest of the dialog background should be white.
   DCHECK(height() > background_image_->height());
   canvas->FillRectInt(SK_ColorWHITE, 0, background_image_->height(), width(),
                       height() - background_image_->height());
 }
 
 void FirstRunSearchEngineView::OnTemplateURLServiceChanged() {
-  using views::ImageView;
-
   // We only watch the search engine model change once, on load.  Remove
   // observer so we don't try to redraw if engines change under us.
-  search_engines_model_->RemoveObserver(this);
+  template_url_service_->RemoveObserver(this);
 
-  // Add search engines in search_engines_model_ to buttons list.  The
-  // first three will always be from prepopulated data.
-  std::vector<const TemplateURL*> template_urls =
-      search_engines_model_->GetTemplateURLs();
-
-  // If we have fewer than two search engines, end search engine dialog
-  // immediately, leaving imported default search engine setting intact.
-  if (template_urls.size() < 2) {
-    MessageLoop::current()->Quit();
-    return;
-  }
-
-  std::vector<const TemplateURL*>::iterator search_engine_iter;
-
-  // Is user's default search engine included in first three prepopulated
-  // set?  If not, we need to expand the dialog to include a fourth engine.
-  const TemplateURL* default_search_engine =
-      search_engines_model_->GetDefaultSearchProvider();
-  // If the user's default choice is not in the first three search engines
-  // in template_urls, store it in |default_choice| and provide it as a
-  // fourth option.
-  SearchEngineChoice* default_choice = NULL;
-
-  // First, see if we have 4 logos to show (in which case we use small logos).
-  // We show 4 logos when the default search engine the user has chosen is
-  // not one of the first three prepopulated engines.
-  if (template_urls.size() > 3) {
-    for (search_engine_iter = template_urls.begin() + 3;
-         search_engine_iter != template_urls.end();
-         ++search_engine_iter) {
-      if (default_search_engine == *search_engine_iter) {
-        default_choice = new SearchEngineChoice(this, *search_engine_iter,
-                                                true);
-      }
-    }
-  }
-
-  // Now that we know what size the logos should be, create new search engine
-  // choices for the view.  If there are 2 search engines, only show 2
-  // choices; for 3 or more, show 3 (unless the default is not one of the
-  // top 3, in which case show 4).
-  for (search_engine_iter = template_urls.begin();
-       search_engine_iter < template_urls.begin() +
-           (template_urls.size() < 3 ? 2 : 3);
-       ++search_engine_iter) {
-    // Push first three engines into buttons:
-    SearchEngineChoice* choice = new SearchEngineChoice(this,
-        *search_engine_iter, default_choice != NULL);
-    search_engine_choices_.push_back(choice);
-    AddChildView(choice->GetView());  // The logo or text view.
-    AddChildView(choice);  // The button associated with the choice.
-  }
-  // Push the default choice to the fourth position.
-  if (default_choice) {
-    search_engine_choices_.push_back(default_choice);
-    AddChildView(default_choice->GetView());  // The logo or text view.
-    AddChildView(default_choice);  // The button associated with the choice.
-  }
-
-  // Randomize order of logos if option has been set.
-  if (randomize_) {
-    std::random_shuffle(search_engine_choices_.begin(),
-                        search_engine_choices_.end(),
-                        base::RandGenerator);
-    // Assign to each choice the position in which it is shown on the screen.
-    std::vector<SearchEngineChoice*>::iterator it;
-    int slot = 0;
-    for (it = search_engine_choices_.begin();
-         it != search_engine_choices_.end();
-         it++) {
-      (*it)->set_slot(slot++);
-    }
-  }
-
-  // Now that we know how many logos to show, lay out and become visible.
-  SetVisible(true);
-  Layout();
-  SchedulePaint();
-
-  // If the widget has detected that a screenreader is running, change the
-  // button names from "Choose" to the name of the search engine. This works
-  // around a bug that JAWS ignores the accessible name of a native button.
-  if (GetWidget() && GetWidget()->IsAccessibleWidget()) {
-    std::vector<SearchEngineChoice*>::iterator it;
-    for (it = search_engine_choices_.begin();
-         it != search_engine_choices_.end();
-         it++) {
-      (*it)->SetText((*it)->GetSearchEngine()->short_name());
-    }
-  }
-
-  // This will tell screenreaders that they should read the full text
-  // of this dialog to the user now (rather than waiting for the user
-  // to explore it).
-  GetWidget()->NotifyAccessibilityEvent(
-      this, ui::AccessibilityTypes::EVENT_ALERT, true);
+  template_url_service_loaded_ = true;
+  AddSearchEnginesIfPossible();
 }
 
 gfx::Size FirstRunSearchEngineView::GetPreferredSize() {
   return views::Widget::GetLocalizedContentsSize(
       IDS_FIRSTRUN_SEARCH_ENGINE_SELECTION_WIDTH_CHARS,
       IDS_FIRSTRUN_SEARCH_ENGINE_SELECTION_HEIGHT_LINES);
 }
 
-void FirstRunSearchEngineView::SetupControls() {
-  using views::Background;
-  using views::ImageView;
-  using views::Label;
-
-  ResourceBundle& rb = ResourceBundle::GetSharedInstance();
-  background_image_ = new views::ImageView();
-  background_image_->SetImage(rb.GetBitmapNamed(IDR_SEARCH_ENGINE_DIALOG_TOP));
-  background_image_->EnableCanvasFlippingForRTLUI(true);
-  if (text_direction_is_rtl_) {
-    background_image_->SetHorizontalAlignment(ImageView::LEADING);
-  } else {
-    background_image_->SetHorizontalAlignment(ImageView::TRAILING);
-  }
-
-  AddChildView(background_image_);
-
-  int label_width = GetPreferredSize().width() - 2 * views::kPanelHorizMargin;
-
-  // Add title and text asking the user to choose a search engine:
-  title_label_ = new Label(l10n_util::GetStringUTF16(
-      IDS_FR_SEARCH_MAIN_LABEL));
-  title_label_->SetColor(SK_ColorBLACK);
-  title_label_->SetFont(title_label_->font().DeriveFont(3, gfx::Font::BOLD));
-  title_label_->SetMultiLine(true);
-  title_label_->SetHorizontalAlignment(Label::ALIGN_LEFT);
-  title_label_->SizeToFit(label_width);
-  AddChildView(title_label_);
-
-  text_label_ = new Label(l10n_util::GetStringFUTF16(
-      IDS_FR_SEARCH_TEXT,
-      l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
-  text_label_->SetColor(SK_ColorBLACK);
-  text_label_->SetFont(text_label_->font().DeriveFont(1, gfx::Font::NORMAL));
-  text_label_->SetMultiLine(true);
-  text_label_->SetHorizontalAlignment(Label::ALIGN_LEFT);
-  text_label_->SizeToFit(label_width);
-  AddChildView(text_label_);
-}
-
 void FirstRunSearchEngineView::Layout() {
   // Disable the close button.
   GetWidget()->EnableClose(false);
 
   gfx::Size pref_size = background_image_->GetPreferredSize();
   background_image_->SetBounds(0, 0, GetPreferredSize().width(),
                                pref_size.height());
 
   // General vertical spacing between elements:
   const int kVertSpacing = 8;
@@ skipping 92 matching lines @@
 
     if (num_choices > 3) {
       next_h_space = search_engine_choices_[2]->x() + logo_width +
                      logo_padding;
       search_engine_choices_[3]->SetBounds(next_h_space, next_v_space,
                                            button_width, button_height);
     }
   }  // if (search_engine_choices.size() > 0)
 }
 
+void FirstRunSearchEngineView::ViewHierarchyChanged(bool is_add,
+                                                    View* parent,
+                                                    View* child) {
+  View::ViewHierarchyChanged(is_add, parent, child);
+
+  if (is_add && (child == this)) {
+    background_image_ = new views::ImageView();
+    background_image_->SetImage(
+        ResourceBundle::GetSharedInstance().GetBitmapNamed(
+            IDR_SEARCH_ENGINE_DIALOG_TOP));
+    background_image_->EnableCanvasFlippingForRTLUI(true);
+    background_image_->SetHorizontalAlignment(text_direction_is_rtl_ ?
+        views::ImageView::LEADING : views::ImageView::TRAILING);
+
+    AddChildView(background_image_);
+
+    int label_width = GetPreferredSize().width() - 2 * views::kPanelHorizMargin;
+
+    // Add title and text asking the user to choose a search engine:
+    title_label_ = new views::Label(l10n_util::GetStringUTF16(
+        IDS_FR_SEARCH_MAIN_LABEL));
+    title_label_->SetBackgroundColor(
+        GetThemeProvider()->GetColor(ThemeService::COLOR_TOOLBAR));
+    title_label_->SetEnabledColor(SK_ColorBLACK);
+    title_label_->SetFont(title_label_->font().DeriveFont(3, gfx::Font::BOLD));
+    title_label_->SetMultiLine(true);
+    title_label_->SetHorizontalAlignment(views::Label::ALIGN_LEFT);
+    title_label_->SizeToFit(label_width);
+    AddChildView(title_label_);
+
+    text_label_ = new views::Label(l10n_util::GetStringFUTF16(
+        IDS_FR_SEARCH_TEXT, l10n_util::GetStringUTF16(IDS_PRODUCT_NAME)));
+    text_label_->SetBackgroundColor(SK_ColorWHITE);
+    text_label_->SetEnabledColor(SK_ColorBLACK);
+    text_label_->SetFont(text_label_->font().DeriveFont(1, gfx::Font::NORMAL));
+    text_label_->SetMultiLine(true);
+    text_label_->SetHorizontalAlignment(views::Label::ALIGN_LEFT);
+    text_label_->SizeToFit(label_width);
+    AddChildView(text_label_);
+
+    added_to_view_hierarchy_ = true;
+    AddSearchEnginesIfPossible();
+  }
+}
+
 void FirstRunSearchEngineView::GetAccessibleState(
     ui::AccessibleViewState* state) {
   state->role = ui::AccessibilityTypes::ROLE_ALERT;
 }
+
+void FirstRunSearchEngineView::AddSearchEnginesIfPossible() {
+  if (!template_url_service_loaded_ || !added_to_view_hierarchy_)
+    return;
+
+  // Add search engines in template_url_service_ to buttons list.  The
+  // first three will always be from prepopulated data.
+  std::vector<const TemplateURL*> template_urls =
+      template_url_service_->GetTemplateURLs();
+
+  // If we have fewer than two search engines, end search engine dialog
+  // immediately, leaving imported default search engine setting intact.
+  if (template_urls.size() < 2) {
+    MessageLoop::current()->Quit();
+    return;
+  }
+
+  std::vector<const TemplateURL*>::iterator search_engine_iter;
+
+  // Is user's default search engine included in first three prepopulated
+  // set?  If not, we need to expand the dialog to include a fourth engine.
+  const TemplateURL* default_search_engine =
+      template_url_service_->GetDefaultSearchProvider();
+  // If the user's default choice is not in the first three search engines
+  // in template_urls, store it in |default_choice| and provide it as a
+  // fourth option.
+  SearchEngineChoice* default_choice = NULL;
+
+  // First, see if we have 4 logos to show (in which case we use small logos).
+  // We show 4 logos when the default search engine the user has chosen is
+  // not one of the first three prepopulated engines.
+  if (template_urls.size() > 3) {
+    for (search_engine_iter = template_urls.begin() + 3;
+         search_engine_iter != template_urls.end();
+         ++search_engine_iter) {
+      if (default_search_engine == *search_engine_iter) {
+        default_choice = new SearchEngineChoice(this, *search_engine_iter,
+                                                true);
+      }
+    }
+  }
+
+  // Now that we know what size the logos should be, create new search engine
+  // choices for the view.  If there are 2 search engines, only show 2
+  // choices; for 3 or more, show 3 (unless the default is not one of the
+  // top 3, in which case show 4).
+  for (search_engine_iter = template_urls.begin();
+       search_engine_iter < template_urls.begin() +
+           (template_urls.size() < 3 ? 2 : 3);
+       ++search_engine_iter) {
+    // Push first three engines into buttons:
+    SearchEngineChoice* choice = new SearchEngineChoice(this,
+        *search_engine_iter, default_choice != NULL);
+    search_engine_choices_.push_back(choice);
+    AddChildView(choice->GetView());  // The logo or text view.
+    AddChildView(choice);  // The button associated with the choice.
+  }
+  // Push the default choice to the fourth position.
+  if (default_choice) {
+    search_engine_choices_.push_back(default_choice);
+    AddChildView(default_choice->GetView());  // The logo or text view.
+    AddChildView(default_choice);  // The button associated with the choice.
+  }
+
+  // Randomize order of logos if option has been set.
+  if (randomize_) {
+    std::random_shuffle(search_engine_choices_.begin(),
+                        search_engine_choices_.end(),
+                        base::RandGenerator);
+    // Assign to each choice the position in which it is shown on the screen.
+    std::vector<SearchEngineChoice*>::iterator it;
+    int slot = 0;
+    for (it = search_engine_choices_.begin();
+         it != search_engine_choices_.end();
+         it++) {
+      (*it)->set_slot(slot++);
+    }
+  }
+
+  // Now that we know how many logos to show, lay out and become visible.
+  SetVisible(true);
+  Layout();
+  SchedulePaint();
+
+  // If the widget has detected that a screenreader is running, change the
+  // button names from "Choose" to the name of the search engine. This works
+  // around a bug that JAWS ignores the accessible name of a native button.
+  if (GetWidget() && GetWidget()->IsAccessibleWidget()) {
+    std::vector<SearchEngineChoice*>::iterator it;
+    for (it = search_engine_choices_.begin();
+         it != search_engine_choices_.end();
+         it++) {
+      (*it)->SetText((*it)->GetSearchEngine()->short_name());
+    }
+  }
+
+  // This will tell screenreaders that they should read the full text
+  // of this dialog to the user now (rather than waiting for the user
+  // to explore it).
+  GetWidget()->NotifyAccessibilityEvent(
+      this, ui::AccessibilityTypes::EVENT_ALERT, true);
+}