ui/app_list/views/search_result_page_view.cc

   1 // Copyright 2014 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_result_page_view.h"
   6
   7 #include "ui/app_list/app_list_constants.h"
   8 #include "ui/app_list/app_list_view_delegate.h"
   9 #include "ui/app_list/views/app_list_main_view.h"
  10 #include "ui/app_list/views/search_result_list_view.h"
  11 #include "ui/app_list/views/search_result_tile_item_list_view.h"
  12 #include "ui/views/background.h"
  13 #include "ui/views/layout/box_layout.h"
  14 #include "ui/views/layout/fill_layout.h"
  15 #include "ui/views/shadow_border.h"
  16
  17 namespace app_list {
  18
  19 namespace {
  20
  21 const int kGroupSpacing = 20;
  22 const int kTopPadding = 5;
  23
  24 // A container view that ensures the card background and the shadow are painted
  25 // in the correct order.
  26 class SearchCardView : public views::View {
  27  public:
  28   explicit SearchCardView(views::View* content_view) {
  29     SetBorder(make_scoped_ptr(new views::ShadowBorder(
  30         kCardShadowBlur, kCardShadowColor, kCardShadowYOffset, 0)));
  31     SetLayoutManager(new views::FillLayout());
  32     content_view->set_background(
  33         views::Background::CreateSolidBackground(kCardBackgroundColor));
  34     AddChildView(content_view);
  35   }
  36
  37   ~SearchCardView() override {}
  38
  39   void ChildPreferredSizeChanged(views::View* child) override {
  40     Layout();
  41     PreferredSizeChanged();
  42   }
  43 };
  44
  45 }  // namespace
  46
  47 SearchResultPageView::SearchResultPageView() : selected_index_(0) {
  48   SetLayoutManager(new views::BoxLayout(views::BoxLayout::kVertical,
  49                                         kExperimentalWindowPadding, kTopPadding,
  50                                         kGroupSpacing));
  51 }
  52
  53 SearchResultPageView::~SearchResultPageView() {
  54 }
  55
  56 void SearchResultPageView::AddSearchResultContainerView(
  57     AppListModel::SearchResults* results_model,
  58     SearchResultContainerView* result_container) {
  59   AddChildView(new SearchCardView(result_container));
  60   result_container_views_.push_back(result_container);
  61   result_container->SetResults(results_model);
  62 }
  63
  64 bool SearchResultPageView::OnKeyPressed(const ui::KeyEvent& event) {
  65   if (result_container_views_.at(selected_index_)->OnKeyPressed(event))
  66     return true;
  67
  68   int dir = 0;
  69   switch (event.key_code()) {
  70     case ui::VKEY_TAB:
  71       dir = event.IsShiftDown() ? -1 : 1;
  72       break;
  73     case ui::VKEY_UP:
  74       dir = -1;
  75       break;
  76     case ui::VKEY_DOWN:
  77       dir = 1;
  78       break;
  79     default:
  80       return false;
  81   }
  82
  83   // Find the next result container with results.
  84   int new_selected = selected_index_;
  85   do {
  86     new_selected += dir;
  87   } while (IsValidSelectionIndex(new_selected) &&
  88            result_container_views_[new_selected]->num_results() == 0);
  89
  90   if (IsValidSelectionIndex(new_selected)) {
  91     SetSelectedIndex(new_selected);
  92     return true;
  93   }
  94
  95   // Capture the Tab key to prevent defocusing of the search box.
  96   return event.key_code() == ui::VKEY_TAB;
  97 }
  98
  99 void SearchResultPageView::SetSelectedIndex(int index) {
 100   bool from_bottom = index < selected_index_;
 101
 102   // Reset the old selected view's selection.
 103   result_container_views_[selected_index_]->ClearSelectedIndex();
 104   selected_index_ = index;
 105   // Set the new selected view's selection to its first result.
 106   result_container_views_[selected_index_]->OnContainerSelected(from_bottom);
 107 }
 108
 109 bool SearchResultPageView::IsValidSelectionIndex(int index) {
 110   return index >= 0 && index < static_cast<int>(result_container_views_.size());
 111 }
 112
 113 void SearchResultPageView::ChildPreferredSizeChanged(views::View* child) {
 114   DCHECK(!result_container_views_.empty());
 115   Layout();
 116   SetSelectedIndex(0);
 117 }
 118
 119 }  // namespace app_list