Misc. infobar stuff:

chrome/browser/ui/views/infobars/infobar.h

-// Copyright (c) 2011 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 CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_H_
-#define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_H_
-#pragma once
-
-#include "base/basictypes.h"
-#include "base/scoped_ptr.h"
-#include "ui/base/animation/animation_delegate.h"
-#include "ui/gfx/size.h"
-
-class InfoBarContainer;
-class InfoBarDelegate;
-
-namespace ui {
-class SlideAnimation;
-}
-
-class InfoBar : public ui::AnimationDelegate {
- public:
-  explicit InfoBar(InfoBarDelegate* delegate);
-  virtual ~InfoBar();
-
-  // Platforms must define these.
-  static const int kSeparatorLineHeight;
-  static const int kDefaultArrowTargetHeight;
-  static const int kMaximumArrowTargetHeight;
-  // The half-width (see comments on |arrow_half_width_| below) scales to its
-  // default and maximum values proportionally to how the height scales to its.
-  static const int kDefaultArrowTargetHalfWidth;
-  static const int kMaximumArrowTargetHalfWidth;
-
-  InfoBarDelegate* delegate() { return delegate_; }
-  void set_container(InfoBarContainer* container) { container_ = container; }
-
-  // Makes the infobar visible.  If |animate| is true, the infobar is then
-  // animated to full size.
-  void Show(bool animate);
-
-  // Makes the infobar hidden.  If |animate| is true, the infobar is first
-  // animated to zero size.  Once the infobar is hidden, it is removed from its
-  // container (triggering its deletion), and its delegate is closed.
-  void Hide(bool animate);
-
-  // Changes the target height of the arrow portion of the infobar.  This has no
-  // effect once the infobar is animating closed.
-  void SetArrowTargetHeight(int height);
-
-  const ui::SlideAnimation* animation() const { return animation_.get(); }
-  int arrow_height() const { return arrow_height_; }
-  int total_height() const { return arrow_height_ + bar_height_; }
-
- protected:
-  // Platforms must define this.
-  static const int kDefaultBarTargetHeight;
-
-  // ui::AnimationDelegate:
-  virtual void AnimationProgressed(const ui::Animation* animation) OVERRIDE;
-
-  // Called when the user closes the infobar, notifies the delegate we've been
-  // dismissed and forwards a removal request to our owner.
-  void RemoveInfoBar();
-
-  // Changes the target height of the main ("bar") portion of the infobar.
-  void SetBarTargetHeight(int height);
-
-  // Given a control with size |prefsize|, returns the centered y position
-  // within us, taking into account animation so the control "slides in" (or
-  // out) as we animate open and closed.
-  int OffsetY(const gfx::Size& prefsize) const;
-
-  const InfoBarContainer* container() const { return container_; }
-  ui::SlideAnimation* animation() { return animation_.get(); }
-  int arrow_half_width() const { return arrow_half_width_; }
-  int bar_height() const { return bar_height_; }
-
-  // Platforms may optionally override these if they need to do work during
-  // processing of the given calls.
-  virtual void PlatformSpecificHide(bool animate) {}
-  virtual void PlatformSpecificOnHeightsRecalculated() {}
-
- private:
-  // ui::AnimationDelegate:
-  virtual void AnimationEnded(const ui::Animation* animation) OVERRIDE;
-
-  // Finds the new desired arrow and bar heights, and if they differ from the
-  // current ones, calls PlatformSpecificOnHeightRecalculated().  Informs our
-  // container our state has changed if either the heights have changed or
-  // |force_notify| is set.
-  void RecalculateHeights(bool force_notify);
-
-  // Checks whether we're closed.  If so, notifies the container that it should
-  // remove us (which will cause the platform-specific code to asynchronously
-  // delete us) and closes the delegate.
-  void MaybeDelete();
-
-  InfoBarDelegate* delegate_;
-  InfoBarContainer* container_;
-  scoped_ptr<ui::SlideAnimation> animation_;
-
-  // The current and target heights of the arrow and bar portions, and half the
-  // current arrow width.  (It's easier to work in half-widths as we draw the
-  // arrow as two halves on either side of a center point.)
-  int arrow_height_;         // Includes both fill and top stroke.
-  int arrow_target_height_;
-  int arrow_half_width_;     // Includes only fill.
-  int bar_height_;           // Includes both fill and bottom separator.
-  int bar_target_height_;
-
-  DISALLOW_COPY_AND_ASSIGN(InfoBar);
-};
-
-#endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_H_