ui/views/view_targeter.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_VIEWS_VIEW_TARGETER_H_
   6 #define UI_VIEWS_VIEW_TARGETER_H_
   7
   8 #include "ui/events/event_targeter.h"
   9 #include "ui/views/views_export.h"
  10
  11 namespace views {
  12
  13 class View;
  14
  15 // Contains the logic used to determine the View to which an
  16 // event should be dispatched. A ViewTargeter (or one of its
  17 // derived classes) is installed on a View to specify the
  18 // targeting behaviour to be used for the subtree rooted at
  19 // that View.
  20 class VIEWS_EXPORT ViewTargeter : public ui::EventTargeter {
  21  public:
  22   ViewTargeter();
  23   virtual ~ViewTargeter();
  24
  25  protected:
  26   // ui::EventTargeter:
  27   virtual ui::EventTarget* FindTargetForEvent(ui::EventTarget* root,
  28                                               ui::Event* event) OVERRIDE;
  29   virtual ui::EventTarget* FindNextBestTarget(ui::EventTarget* previous_target,
  30                                               ui::Event* event) OVERRIDE;
  31
  32  private:
  33   View* FindTargetForKeyEvent(View* view, const ui::KeyEvent& key);
  34
  35   DISALLOW_COPY_AND_ASSIGN(ViewTargeter);
  36 };
  37
  38 }  // namespace views
  39
  40 #endif  // UI_VIEWS_VIEW_TARGETER_H_