chrome/browser/chromeos/ui/accessibility_focus_ring_layer.h

   1 // Copyright 2014 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_ACCESSIBILITY_FOCUS_RING_LAYER_H_
   6 #define CHROME_BROWSER_CHROMEOS_UI_ACCESSIBILITY_FOCUS_RING_LAYER_H_
   7
   8 #include "chrome/browser/chromeos/ui/accessibility_focus_ring.h"
   9 #include "chrome/browser/chromeos/ui/focus_ring_layer.h"
  10
  11 namespace chromeos {
  12
  13 // A subclass of FocusRingLayer intended for use by ChromeVox; it supports
  14 // nonrectangular focus rings in order to highlight groups of elements or
  15 // a range of text on a page.
  16 class AccessibilityFocusRingLayer : public FocusRingLayer {
  17  public:
  18   explicit AccessibilityFocusRingLayer(FocusRingLayerDelegate* delegate);
  19   virtual ~AccessibilityFocusRingLayer();
  20
  21   // Create the layer and update its bounds and position in the hierarchy.
  22   void Set(const AccessibilityFocusRing& ring);
  23
  24  private:
  25   // ui::LayerDelegate overrides:
  26   virtual void OnPaintLayer(gfx::Canvas* canvas) override;
  27
  28   // The outline of the current focus ring.
  29   AccessibilityFocusRing ring_;
  30
  31   DISALLOW_COPY_AND_ASSIGN(AccessibilityFocusRingLayer);
  32 };
  33
  34 }  // namespace chromeos
  35
  36 #endif  // CHROME_BROWSER_CHROMEOS_UI_ACCESSIBILITY_FOCUS_RING_LAYER_H_