text: // Copyright (c) 2012 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.
  
  #ifndef UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_H_
  #define UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_H_
  #pragma once
  
  #include "base/basictypes.h"
  #include "base/memory/weak_ptr.h"
  #include "ui/app_list/app_list_model.h"
  #include "ui/base/models/list_model_observer.h"
  #include "ui/views/controls/button/button.h"
  #include "ui/views/view.h"
  
  namespace app_list {
  
  class SearchResultListViewDelegate;
  class SearchResultView;
  
  // SearchResultListView displays AppListModel::SearchResults with a list of
  // SearchResultView.
  class SearchResultListView : public views::View,
                               public views::ButtonListener,
                               public ui::ListModelObserver {
   public:
    explicit SearchResultListView(SearchResultListViewDelegate* delegate);
    virtual ~SearchResultListView();
  
    void SetResults(AppListModel::SearchResults* results);
  
    void SetSelectedIndex(int selected_index);
  
    bool IsResultViewSelected(const SearchResultView* result_view) const;
  
   private:
    // Helper function to get SearchResultView at given |index|.
    SearchResultView* GetResultViewAt(int index);
  
    // Updates UI with model.
    void Update();
  
    // Schedules an Update call using |update_factory_|. Do nothing if there is a
    // pending call.
    void ScheduleUpdate();
  
    // Overridden from views::View:
    virtual bool OnKeyPressed(const views::KeyEvent& event) OVERRIDE;
  
    // Overridden from views::ButtonListener:
    virtual void ButtonPressed(views::Button* sender,
                               const views::Event& event) OVERRIDE;
  
    // Overridden from ListModelObserver:
    virtual void ListItemsAdded(size_t start, size_t count) OVERRIDE;
    virtual void ListItemsRemoved(size_t start, size_t count) OVERRIDE;
    virtual void ListItemsChanged(size_t start, size_t count) OVERRIDE;
  
    SearchResultListViewDelegate* delegate_;  // Not owned.
    AppListModel::SearchResults* results_;  // Owned by AppListModel.
  
    int last_visible_index_;
    int selected_index_;
  
    // The factory that consolidates multiple Update calls into one.
    base::WeakPtrFactory<SearchResultListView> update_factory_;
  
    DISALLOW_COPY_AND_ASSIGN(SearchResultListView);
  };
  
  }  // namespace app_ist
  
  #endif  // UI_APP_LIST_SEARCH_RESULT_LIST_VIEW_H_
  