1// Copyright (c) 2011 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_INFOBARS_INFOBAR_H_
6#define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_H_
7#pragma once
8
9#include "base/basictypes.h"
10#include "base/scoped_ptr.h"
11#include "ui/base/animation/animation_delegate.h"
12#include "ui/gfx/size.h"
13
14class InfoBarContainer;
15class InfoBarDelegate;
16
17namespace ui {
18class SlideAnimation;
19}
20
21class InfoBar : public ui::AnimationDelegate {
22 public:
23  explicit InfoBar(InfoBarDelegate* delegate);
24  virtual ~InfoBar();
25
26  // Platforms must define these.
27  static const int kSeparatorLineHeight;
28  static const int kDefaultArrowTargetHeight;
29  static const int kMaximumArrowTargetHeight;
30  // The half-width (see comments on |arrow_half_width_| below) scales to its
31  // default and maximum values proportionally to how the height scales to its.
32  static const int kDefaultArrowTargetHalfWidth;
33  static const int kMaximumArrowTargetHalfWidth;
34
35  InfoBarDelegate* delegate() { return delegate_; }
36  void set_container(InfoBarContainer* container) { container_ = container; }
37
38  // Makes the infobar visible.  If |animate| is true, the infobar is then
39  // animated to full size.
40  void Show(bool animate);
41
42  // Makes the infobar hidden.  If |animate| is true, the infobar is first
43  // animated to zero size.  Once the infobar is hidden, it is removed from its
44  // container (triggering its deletion), and its delegate is closed.
45  void Hide(bool animate);
46
47  // Changes the target height of the arrow portion of the infobar.  This has no
48  // effect once the infobar is animating closed.
49  void SetArrowTargetHeight(int height);
50
51  const ui::SlideAnimation* animation() const { return animation_.get(); }
52  int arrow_height() const { return arrow_height_; }
53  int total_height() const { return arrow_height_ + bar_height_; }
54
55 protected:
56  // Platforms must define this.
57  static const int kDefaultBarTargetHeight;
58
59  // ui::AnimationDelegate:
60  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
61
62  // Called when the user closes the infobar, notifies the delegate we've been
63  // dismissed and forwards a removal request to our owner.
64  void RemoveInfoBar();
65
66  // Changes the target height of the main ("bar") portion of the infobar.
67  void SetBarTargetHeight(int height);
68
69  // Given a control with size |prefsize|, returns the centered y position
70  // within us, taking into account animation so the control "slides in" (or
71  // out) as we animate open and closed.
72  int OffsetY(const gfx::Size& prefsize) const;
73
74  const InfoBarContainer* container() const { return container_; }
75  ui::SlideAnimation* animation() { return animation_.get(); }
76  int arrow_half_width() const { return arrow_half_width_; }
77  int bar_height() const { return bar_height_; }
78
79  // Platforms may optionally override these if they need to do work during
80  // processing of the given calls.
81  virtual void PlatformSpecificHide(bool animate) {}
82  virtual void PlatformSpecificOnHeightsRecalculated() {}
83
84 private:
85  // ui::AnimationDelegate:
86  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
87
88  // Finds the new desired arrow and bar heights, and if they differ from the
89  // current ones, calls PlatformSpecificOnHeightRecalculated().  Informs our
90  // container our state has changed if either the heights have changed or
91  // |force_notify| is set.
92  void RecalculateHeights(bool force_notify);
93
94  // Checks whether we're closed.  If so, notifies the container that it should
95  // remove us (which will cause the platform-specific code to asynchronously
96  // delete us) and closes the delegate.
97  void MaybeDelete();
98
99  InfoBarDelegate* delegate_;
100  InfoBarContainer* container_;
101  scoped_ptr<ui::SlideAnimation> animation_;
102
103  // The current and target heights of the arrow and bar portions, and half the
104  // current arrow width.  (It's easier to work in half-widths as we draw the
105  // arrow as two halves on either side of a center point.)
106  int arrow_height_;         // Includes both fill and top stroke.
107  int arrow_target_height_;
108  int arrow_half_width_;     // Includes only fill.
109  int bar_height_;           // Includes both fill and bottom separator.
110  int bar_target_height_;
111
112  DISALLOW_COPY_AND_ASSIGN(InfoBar);
113};
114
115#endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_H_
116