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      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 #ifndef ATHENA_HOME_ATHENA_START_PAGE_VIEW_H_
      6 #define ATHENA_HOME_ATHENA_START_PAGE_VIEW_H_
      7 
      8 #include "athena/athena_export.h"
      9 #include "base/memory/weak_ptr.h"
     10 #include "ui/app_list/views/search_box_view_delegate.h"
     11 #include "ui/gfx/animation/tween.h"
     12 #include "ui/views/view.h"
     13 
     14 namespace app_list {
     15 class AppListViewDelegate;
     16 class SearchBoxView;
     17 class SearchResultListView;
     18 }
     19 
     20 namespace athena {
     21 
     22 class ATHENA_EXPORT AthenaStartPageView
     23     : public views::View,
     24       public app_list::SearchBoxViewDelegate {
     25  public:
     26   explicit AthenaStartPageView(app_list::AppListViewDelegate* delegate);
     27   virtual ~AthenaStartPageView();
     28 
     29   // Requests the focus on the search box in the start page view.
     30   void RequestFocusOnSearchBox();
     31 
     32   // Updates the layout state. See the comment of |layout_state_| field.
     33   void SetLayoutState(float layout_state);
     34 
     35   // Updates the layout state and move the subviews to the target location with
     36   // animation.
     37   void SetLayoutStateWithAnimation(float layout_state,
     38                                    gfx::Tween::Type tween_type);
     39 
     40  private:
     41   friend class AthenaStartPageViewTest;
     42 
     43   static const char kViewClassName[];
     44 
     45   // A struct which bundles the layout data of subviews.
     46   struct LayoutData {
     47     gfx::Rect search_box;
     48     gfx::Rect icons;
     49     gfx::Rect controls;
     50     float system_info_opacity;
     51     float logo_opacity;
     52     float background_opacity;
     53 
     54     LayoutData();
     55   };
     56 
     57   // Returns the bounds for |VISIBLE_BOTTOM|.
     58   LayoutData CreateBottomBounds(int width);
     59 
     60   // Returns the bounds for |VISIBLE_CENTERED|.
     61   LayoutData CreateCenteredBounds(int width);
     62 
     63   // Schedules the animation for the layout the search box and the search
     64   // results.
     65   void LayoutSearchResults(bool should_show_search_results);
     66 
     67   // Called when the animation of search box / search results layout has
     68   // completed.
     69   void OnSearchResultLayoutAnimationCompleted(bool should_show_search_results);
     70 
     71   // views::View:
     72   virtual void Layout() OVERRIDE;
     73   virtual bool OnKeyPressed(const ui::KeyEvent& key_event) OVERRIDE;
     74 
     75   // app_list::SearchBoxViewDelegate:
     76   virtual void QueryChanged(app_list::SearchBoxView* sender) OVERRIDE;
     77 
     78   // Not owned.
     79   app_list::AppListViewDelegate* delegate_;
     80 
     81   // Views are owned through its hierarchy.
     82   views::View* system_info_view_;
     83   views::View* app_icon_container_;
     84   views::View* search_box_container_;
     85   views::View* control_icon_container_;
     86   views::View* logo_;
     87   app_list::SearchBoxView* search_box_view_;
     88   app_list::SearchResultListView* search_results_view_;
     89 
     90   // Do not use views::Background but a views::View with ui::Layer for gradient
     91   // background opacity update and animation.
     92   views::View* background_;
     93 
     94   // The expected height of |search_results_view_|
     95   int search_results_height_;
     96 
     97   // The state to specify how each of the subviews should be laid out, in the
     98   // range of [0, 1]. 0 means fully BOTTOM state, and 1 is fully CENTERED state.
     99   float layout_state_;
    100 
    101   base::WeakPtrFactory<AthenaStartPageView> weak_factory_;
    102 
    103   DISALLOW_COPY_AND_ASSIGN(AthenaStartPageView);
    104 };
    105 
    106 }  // namespace athena
    107 
    108 #endif  // ATHENA_HOME_ATHENA_START_PAGE_VIEW_H_
    109