ui/accessibility/platform/ax_platform_node_delegate.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 UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_
   6 #define UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_
   7
   8 #include "ui/accessibility/ax_enums.h"
   9 #include "ui/accessibility/ax_export.h"
  10 #include "ui/gfx/geometry/vector2d.h"
  11 #include "ui/gfx/native_widget_types.h"
  12
  13 namespace ui {
  14
  15 struct AXNodeData;
  16 class AXPlatformNode;
  17
  18 class AX_EXPORT AXPlatformNodeDelegate {
  19  public:
  20   // Get the accessibility data that should be exposed for this node.
  21   virtual AXNodeData* GetData() = 0;
  22
  23   // Get the parent of the node unless it's the root, then it returns NULL.
  24   virtual gfx::NativeViewAccessible GetParent() = 0;
  25
  26   // Get the number of children of this node.
  27   virtual int GetChildCount() = 0;
  28
  29   // Get the child of a node from [0...GetChildCount() - 1]
  30   virtual gfx::NativeViewAccessible ChildAtIndex(int index) = 0;
  31
  32   // Get the offset to convert local coordinates to screen global coordinates.
  33   virtual gfx::Vector2d GetGlobalCoordinateOffset() = 0;
  34
  35   //
  36   // Events.
  37   //
  38   virtual void NotifyAccessibilityEvent(ui::AXEvent event_type) = 0;
  39
  40 };
  41
  42 }  // namespace ui
  43
  44 #endif  // UI_ACCESSIBILITY_PLATFORM_AX_PLATFORM_NODE_DELEGATE_H_