Implement learn more bubble on views.

chrome/browser/ui/views/autofill/info_bubble.h

+// Copyright 2013 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_AUTOFILL_INFO_BUBBLE_H_
+#define CHROME_BROWSER_UI_VIEWS_AUTOFILL_INFO_BUBBLE_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/strings/string16.h"
+#include "ui/gfx/insets.h"
+#include "ui/views/bubble/bubble_delegate.h"
+
+namespace autofill {
+
+// Class to create and manage an information bubble for errors or tooltips.
+class InfoBubble : public views::BubbleDelegateView {
+ public:
+  InfoBubble(views::View* anchor, const base::string16& message);
+  virtual ~InfoBubble();
+
+  // Shows the bubble. |widget_| will be NULL until this is called.
+  void Show();
+
+  // Hides and closes the bubble.
+  void Hide();
+
+  // Updates the position of the bubble.
+  void UpdatePosition();
+
+  // views::BubbleDelegateView:
+  virtual gfx::Size GetPreferredSize() OVERRIDE;
+  virtual gfx::Rect GetBubbleBounds() OVERRIDE;
+  virtual void OnWidgetClosing(views::Widget* widget) OVERRIDE;
+  virtual bool ShouldFlipArrowForRtl() const OVERRIDE;
+
+  views::View* anchor() { return anchor_; }
+
+  void set_align_to_anchor_edge(bool align_to_anchor_edge) {
+    align_to_anchor_edge_ = align_to_anchor_edge;
+  }
+
+  void set_container_insets(const gfx::Insets& container_insets) {
+    container_insets_ = container_insets;
+  }
+
+  void set_preferred_width(int preferred_width) {
+    preferred_width_ = preferred_width;
+  }
+
+  void set_show_above_anchor(bool show_above_anchor) {
+    show_above_anchor_ = show_above_anchor;
+  }
+
+ private:
+  // Whether the bubble should stick to the right edge of |anchor_|.
+  bool ShouldArrowGoOnTheRight();
+
+  views::Widget* widget_;  // Weak, may be NULL.
+  views::View* const anchor_;  // Weak.
+
+  // Whether the bubble should align its border to the anchor's edge rather than
+  // horizontally centering the arrow on |anchor_|'s midpoint. Default is false.
+  bool align_to_anchor_edge_;
+
+  // Shrinks the container's size when calculating whether the arrow should be
+  // on the right or left side of the bubble.
+  gfx::Insets container_insets_;
+
+  // The width this bubble prefers to be. Default is 0 (no preference).
+  int preferred_width_;
+
+  // Whether the bubble should be shown above the anchor (default is below).
+  bool show_above_anchor_;
+
+  DISALLOW_COPY_AND_ASSIGN(InfoBubble);
+};
+
+}  // namespace autofill
+
+#endif  // CHROME_BROWSER_UI_VIEWS_AUTOFILL_INFO_BUBBLE_H_