chrome/browser/chromeos/ui/focus_ring_controller.h

   1 // Copyright 2013 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_CHROMEOS_UI_FOCUS_RING_CONTROLLER_H_
   6 #define CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_CONTROLLER_H_
   7
   8 #include "base/basictypes.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ui/views/focus/focus_manager.h"
  11 #include "ui/views/focus/widget_focus_manager.h"
  12 #include "ui/views/widget/widget_observer.h"
  13
  14 namespace views {
  15 class View;
  16 class Widget;
  17 }
  18
  19 namespace chromeos {
  20
  21 class FocusRingLayer;
  22
  23 // FocusRingController manages the focus ring around the focused view. It
  24 // follows widget focus change and update the focus ring layer when the focused
  25 // view of the widget changes.
  26 class FocusRingController : public views::WidgetObserver,
  27                             public views::WidgetFocusChangeListener,
  28                             public views::FocusChangeListener {
  29  public:
  30   FocusRingController();
  31   virtual ~FocusRingController();
  32
  33   // Turns on/off the focus ring.
  34   void SetVisible(bool visible);
  35
  36  private:
  37   // Sets the focused |widget|.
  38   void SetWidget(views::Widget* widget);
  39
  40   // Updates the focus ring to the focused view of |widget_|. If |widget_| is
  41   // NULL or has no focused view, removes the focus ring. Otherwise, draws it.
  42   void UpdateFocusRing();
  43
  44   // views::WidgetObserver overrides:
  45   virtual void OnWidgetDestroying(views::Widget* widget) OVERRIDE;
  46   virtual void OnWidgetBoundsChanged(views::Widget* widget,
  47                                      const gfx::Rect& new_bounds) OVERRIDE;
  48
  49   // views::WidgetFocusChangeListener overrides:
  50   virtual void OnNativeFocusChange(gfx::NativeView focused_before,
  51                                    gfx::NativeView focused_now) OVERRIDE;
  52
  53   // views::FocusChangeListener overrides:
  54   virtual void OnWillChangeFocus(views::View* focused_before,
  55                                  views::View* focused_now) OVERRIDE;
  56   virtual void OnDidChangeFocus(views::View* focused_before,
  57                                 views::View* focused_now) OVERRIDE;
  58
  59   bool visible_;
  60
  61   views::Widget* widget_;
  62   scoped_ptr<FocusRingLayer> focus_ring_layer_;
  63
  64   DISALLOW_COPY_AND_ASSIGN(FocusRingController);
  65 };
  66
  67 }  // namespace chromeos
  68
  69 #endif  // CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_CONTROLLER_H_