zoom_view.h revision 3551c9c881056c480085172ff9840cab31610854 
1// Copyright (c) 2012 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_LOCATION_BAR_ZOOM_VIEW_H_
6#define CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_VIEW_H_
7
8#include "base/basictypes.h"
9#include "base/compiler_specific.h"
10#include "chrome/browser/ui/views/location_bar/location_bar_view.h"
11#include "ui/views/controls/image_view.h"
12
13class ZoomController;
14
15// View for the zoom icon in the Omnibox.
16class ZoomView : public views::ImageView {
17 public:
18  // Clicking on the ZoomView shows a ZoomBubbleView, which requires the current
19  // WebContents. Because the current WebContents changes as the user switches
20  // tabs, it cannot be provided in the constructor. Instead, a
21  // LocationBarView::Delegate is passed here so that it can be queried for the
22  // current WebContents as needed.
23  explicit ZoomView(LocationBarView::Delegate* location_bar_delegate);
24  virtual ~ZoomView();
25
26  // Updates the image and its tooltip appropriately, hiding or showing the icon
27  // as needed.
28  void Update(ZoomController* zoom_controller);
29
30 private:
31  // views::ImageView:
32  virtual void GetAccessibleState(ui::AccessibleViewState* state) OVERRIDE;
33  virtual bool GetTooltipText(const gfx::Point& p,
34                              string16* tooltip) const OVERRIDE;
35  virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
36  virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
37  virtual bool OnKeyPressed(const ui::KeyEvent& event) OVERRIDE;
38
39  // ui::EventHandler:
40  virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
41
42  // Helper method to show and focus the zoom bubble associated with this
43  // widget.
44  void ActivateBubble();
45
46  // The delegate used to get the currently visible WebContents.
47  LocationBarView::Delegate* location_bar_delegate_;
48
49  DISALLOW_COPY_AND_ASSIGN(ZoomView);
50};
51
52#endif  // CHROME_BROWSER_UI_VIEWS_LOCATION_BAR_ZOOM_VIEW_H_
53