app_list: Add search box and search result view for v2.

ui/app_list/search_result_list_view.h

+// 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_