contents_container.h revision 3f50c38dc070f4bb515c1b64450dae14f316474e 
1// Copyright (c) 2010 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 CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
6#define CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
7#pragma once
8
9#include "base/scoped_ptr.h"
10#include "ui/base/animation/animation_delegate.h"
11#include "views/view.h"
12
13class TabContents;
14
15namespace ui {
16class SlideAnimation;
17}
18
19namespace views {
20class Widget;
21}
22
23// ContentsContainer is responsible for managing the TabContents views.
24// ContentsContainer has up to two children: one for the currently active
25// TabContents and one for instant's TabContents.
26class ContentsContainer : public views::View, public ui::AnimationDelegate {
27 public:
28  explicit ContentsContainer(views::View* active);
29  virtual ~ContentsContainer();
30
31  // Makes the preview view the active view and nulls out the old active view.
32  // It's assumed the caller will delete or remove the old active view
33  // separately.
34  void MakePreviewContentsActiveContents();
35
36  // Sets the preview view. This does not delete the old.
37  void SetPreview(views::View* preview, TabContents* preview_tab_contents);
38
39  TabContents* preview_tab_contents() const { return preview_tab_contents_; }
40
41  // Sets the active top margin.
42  void SetActiveTopMargin(int margin);
43
44  // Returns the bounds of the preview. If the preview isn't active this
45  // retuns the bounds the preview would be shown at.
46  gfx::Rect GetPreviewBounds();
47
48  // Fades out the active contents.
49  void FadeActiveContents();
50
51  // Shows the fade. This is similiar to |FadeActiveContents|, but is immediate.
52  void ShowFade();
53
54  // Removes the fade. This is done implicitly when the preview is made active.
55  void RemoveFade();
56
57  // View overrides:
58  virtual void Layout();
59
60  // ui::AnimationDelegate overrides:
61  virtual void AnimationProgressed(const ui::Animation* animation);
62
63 private:
64  class OverlayContentView;
65
66  // Creates the overlay widget. The opacity is set at |initial_opacity|.
67  void CreateOverlay(int initial_opacity);
68
69  // Invoked when the contents view of the overlay is destroyed.
70  void OverlayViewDestroyed();
71
72  views::View* active_;
73
74  views::View* preview_;
75
76  TabContents* preview_tab_contents_;
77
78  // Translucent Widget positioned right above the active view that is used to
79  // make the active view appear faded out.
80  views::Widget* active_overlay_;
81
82  // Content view of active_overlay. Used to track when the widget is destroyed.
83  OverlayContentView* overlay_view_;
84
85  // Animation used to vary the opacity of active_overlay.
86  scoped_ptr<ui::SlideAnimation> overlay_animation_;
87
88  // The margin between the top and the active view. This is used to make the
89  // preview overlap the bookmark bar on the new tab page.
90  int active_top_margin_;
91
92  DISALLOW_COPY_AND_ASSIGN(ContentsContainer);
93};
94
95#endif  // CHROME_BROWSER_UI_VIEWS_FRAME_CONTENTS_CONTAINER_H_
96