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

   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
  13 class ZoomController;
  14
  15 // View for the zoom icon in the Omnibox.
  16 class 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::AXViewState* state) OVERRIDE;
  33   virtual bool GetTooltipText(const gfx::Point& p,
  34                               base::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_