Revert of Experimental app list: Added a current page indicator to the launcher.

ui/app_list/views/contents_switcher_view.cc

 // Copyright 2014 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 "ui/app_list/views/contents_switcher_view.h"
 
 #include "ui/app_list/app_list_constants.h"
 #include "ui/app_list/views/contents_view.h"
-#include "ui/views/background.h"
 #include "ui/views/controls/button/custom_button.h"
 #include "ui/views/controls/button/image_button.h"
 #include "ui/views/layout/box_layout.h"
-#include "ui/views/layout/fill_layout.h"
 
 namespace app_list {
 
 namespace {
 
-const int kButtonImageSize = 32;
-const int kPreferredHeight =
-    kButtonImageSize + kContentsSwitcherSeparatorHeight;
+const int kPreferredHeight = 32;
 const int kButtonSpacing = 4;
 
-class ContentsPageIndicatorView : public views::View {
- public:
-  ContentsPageIndicatorView() {};
-  virtual ~ContentsPageIndicatorView() {};
-
-  // Overridden from views::View:
-  virtual gfx::Size GetPreferredSize() const OVERRIDE {
-    return gfx::Size(0, kContentsSwitcherSeparatorHeight);
-  };
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(ContentsPageIndicatorView);
-};
-
 }  // namespace
 
 ContentsSwitcherView::ContentsSwitcherView(ContentsView* contents_view)
     : contents_view_(contents_view), buttons_(new views::View) {
   AddChildView(buttons_);
 
   buttons_->SetLayoutManager(new views::BoxLayout(
       views::BoxLayout::kHorizontal, 0, 0, kButtonSpacing));
 }
 
 ContentsSwitcherView::~ContentsSwitcherView() {}
 
 void ContentsSwitcherView::AddSwitcherButton(int resource_id, int page_index) {
   views::ImageButton* button = new views::ImageButton(this);
-  button->SetPreferredSize(gfx::Size(kButtonImageSize, kButtonImageSize));
   if (resource_id) {
     button->SetImage(
         views::CustomButton::STATE_NORMAL,
         ui::ResourceBundle::GetSharedInstance().GetImageSkiaNamed(resource_id));
   }
   button->set_tag(page_index);
-
-  // Add an indicator for the current launcher page.
-  app_list::ContentsPageIndicatorView* indicator =
-      new app_list::ContentsPageIndicatorView();
-  indicator->set_background(
-      views::Background::CreateSolidBackground(app_list::kPagerSelectedColor));
-  indicator->SetVisible(false);
-  page_active_indicators_.push_back(indicator);
-
-  // A container view that will consume space when its child is not visible.
-  // TODO(calamity): Remove this once BoxLayout supports space-consuming
-  // invisible views.
-  views::View* indicator_container = new views::View();
-  indicator_container->SetLayoutManager(new views::FillLayout());
-  indicator_container->AddChildView(indicator);
-
-  // View containing the indicator view and image button.
-  views::View* button_container = new views::View();
-  button_container->SetLayoutManager(
-      new views::BoxLayout(views::BoxLayout::kVertical, 0, 0, 0));
-  button_container->AddChildView(indicator_container);
-  button_container->AddChildView(button);
-
-  buttons_->AddChildView(button_container);
+  buttons_->AddChildView(button);
 }
 
 gfx::Size ContentsSwitcherView::GetPreferredSize() const {
   return gfx::Size(buttons_->GetPreferredSize().width(), kPreferredHeight);
 }
 
 void ContentsSwitcherView::Layout() {
   gfx::Rect rect(GetContentsBounds());
 
   // Makes |buttons_| horizontally center and vertically fill.
   gfx::Size buttons_size(buttons_->GetPreferredSize());
   gfx::Rect buttons_bounds(rect.CenterPoint().x() - buttons_size.width() / 2,
                            rect.y(),
                            buttons_size.width(),
                            rect.height());
   buttons_->SetBoundsRect(gfx::IntersectRects(rect, buttons_bounds));
 }
 
 void ContentsSwitcherView::ButtonPressed(views::Button* sender,
                                          const ui::Event& event) {
   contents_view_->SetActivePage(sender->tag());
 }
 
-void ContentsSwitcherView::TotalPagesChanged() {
-}
-
-void ContentsSwitcherView::SelectedPageChanged(int old_selected,
-                                               int new_selected) {
-  // Makes the indicator visible when it is first drawn and when the
-  // selected page is changed.
-  int num_indicators = static_cast<int>(page_active_indicators_.size());
-  if (old_selected >= 0 && old_selected < num_indicators)
-    page_active_indicators_[old_selected]->SetVisible(false);
-
-  if (new_selected >= 0 && new_selected < num_indicators)
-    page_active_indicators_[new_selected]->SetVisible(true);
-}
-
-void ContentsSwitcherView::TransitionStarted() {
-}
-
-void ContentsSwitcherView::TransitionChanged() {
-  // Change the indicator during a launcher page transition.
-  const PaginationModel& pm = contents_view_->pagination_model();
-  int old_selected = pm.selected_page();
-  int new_selected = pm.transition().target_page;
-  if (pm.IsRevertingCurrentTransition()) {
-    // Swap the direction if the transition is reversed.
-    old_selected = pm.transition().target_page;
-    new_selected = pm.selected_page();
-  }
-
-  SelectedPageChanged(old_selected, new_selected);
-}
-
 }  // namespace app_list