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 "chrome/browser/chromeos/ui/focus_ring_layer.h"
  11 #include "ui/views/focus/focus_manager.h"
  12 #include "ui/views/focus/widget_focus_manager.h"
  13 #include "ui/views/widget/widget_observer.h"
  14
  15 namespace views {
  16 class View;
  17 class Widget;
  18 }
  19
  20 namespace chromeos {
  21
  22 // FocusRingController manages the focus ring around the focused view. It
  23 // follows widget focus change and update the focus ring layer when the focused
  24 // view of the widget changes.
  25 class FocusRingController : public FocusRingLayerDelegate,
  26                             public views::WidgetObserver,
  27                             public views::WidgetFocusChangeListener,
  28                             public views::FocusChangeListener {
  29  public:
  30   FocusRingController();
  31   ~FocusRingController() override;
  32
  33   // Turns on/off the focus ring.
  34   void SetVisible(bool visible);
  35
  36  private:
  37   // FocusRingLayerDelegate.
  38   void OnDeviceScaleFactorChanged() override;
  39
  40   // Sets the focused |widget|.
  41   void SetWidget(views::Widget* widget);
  42
  43   // Updates the focus ring to the focused view of |widget_|. If |widget_| is
  44   // NULL or has no focused view, removes the focus ring. Otherwise, draws it.
  45   void UpdateFocusRing();
  46
  47   // views::WidgetObserver overrides:
  48   void OnWidgetDestroying(views::Widget* widget) override;
  49   void OnWidgetBoundsChanged(views::Widget* widget,
  50                              const gfx::Rect& new_bounds) override;
  51
  52   // views::WidgetFocusChangeListener overrides:
  53   void OnNativeFocusChanged(gfx::NativeView focused_now) override;
  54
  55   // views::FocusChangeListener overrides:
  56   void OnWillChangeFocus(views::View* focused_before,
  57                          views::View* focused_now) override;
  58   void OnDidChangeFocus(views::View* focused_before,
  59                         views::View* focused_now) override;
  60
  61   bool visible_;
  62
  63   views::Widget* widget_;
  64   scoped_ptr<FocusRingLayer> focus_ring_layer_;
  65
  66   DISALLOW_COPY_AND_ASSIGN(FocusRingController);
  67 };
  68
  69 }  // namespace chromeos
  70
  71 #endif  // CHROME_BROWSER_CHROMEOS_UI_FOCUS_RING_CONTROLLER_H_