ash/focus_cycler.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 FOCUS_CYCLER_H_
   6 #define FOCUS_CYCLER_H_
   7 #pragma once
   8
   9 #include <vector>
  10
  11 #include "base/compiler_specific.h"
  12 #include "ui/base/accelerators/accelerator.h"
  13
  14 namespace views {
  15 class Widget;
  16 }  // namespace views
  17
  18 namespace ash {
  19
  20 namespace internal {
  21
  22 // This class handles moving focus between a set of widgets and the main browser
  23 // window.
  24 class FocusCycler : public ui::AcceleratorTarget {
  25  public:
  26   enum Direction {
  27     FORWARD,
  28     BACKWARD
  29   };
  30
  31   FocusCycler();
  32   virtual ~FocusCycler();
  33
  34   // Add a widget to the focus cycle and set up accelerators.  The widget needs
  35   // to have an AccessiblePaneView as the content view.
  36   void AddWidget(views::Widget* widget);
  37
  38   // Move focus to the next widget.
  39   void RotateFocus(Direction direction);
  40
  41   // ui::AcceleratorTarget overrides
  42   virtual bool AcceleratorPressed(const ui::Accelerator& accelerator) OVERRIDE;
  43   virtual bool CanHandleAccelerators() const OVERRIDE;
  44
  45  private:
  46   std::vector<views::Widget*> widgets_;
  47
  48   DISALLOW_COPY_AND_ASSIGN(FocusCycler);
  49 };
  50
  51 }  // namespace internal
  52
  53 }  // namespace ash
  54
  55 #endif  // FOCUS_CYCLER_H_