Implements a zoom icon in the Omnibox for Views.

chrome/browser/ui/views/location_bar/zoom_bubble_view.h

+// Copyright (c) 2012 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_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
+#define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_
+#pragma once
+
+#include "base/basictypes.h"
+#include "base/timer.h"
+#include "ui/views/bubble/bubble_delegate.h"
+#include "ui/views/controls/button/button.h"
+#include "ui/views/controls/label.h"
+
+// View used to display the zoom percentage when it has changed.
+class ZoomBubbleView : public views::BubbleDelegateView {
+ public:
+  // Shows the bubble and automatically closes it after a short time period if
+  // |auto_close| is true.
+  static void ShowBubble(views::View* anchor_view,
+                         int zoom_percent,
+                         bool auto_close);
+  static void CloseBubble();
+  static bool IsShowing();
+
+ private:
+  ZoomBubbleView(views::View* anchor_view,
+                 int zoom_percent,
+                 bool auto_close);
+  virtual ~ZoomBubbleView();
+
+  void Close();
+
+  // views::BubbleDelegateView method.
+  virtual void Init() OVERRIDE;
+
+  // views::BubbleDelegateView:
+  virtual void WindowClosing() OVERRIDE;
+
+  // Singleton instance of the zoom bubble. The zoom bubble can only be shown on
+  // the active browser window, so there is no case in which it will be shown
+  // twice at the same time.
+  static ZoomBubbleView* zoom_bubble_;
+
+  // Timer used to close the bubble when |auto_close_| is true.
+  base::OneShotTimer<ZoomBubbleView> timer_;
+
+  // Label displaying the zoom percentage.
+  views::Label* label_;
+
+  // The zoom percentage to show in the bubble.
+  int zoom_percent_;
+
+  // Whether the currently displayed bubble will automatically close.
+  bool auto_close_;
+
+  DISALLOW_COPY_AND_ASSIGN(ZoomBubbleView);
+};
+
+#endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_BUBBLE_VIEW_H_