ui/wm/core/nested_accelerator_dispatcher.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_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_
   6 #define UI_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_
   7
   8 #include "base/macros.h"
   9 #include "base/memory/scoped_ptr.h"
  10 #include "ui/wm/wm_export.h"
  11
  12 namespace base {
  13 class MessagePumpDispatcher;
  14 class RunLoop;
  15 }
  16
  17 namespace ui {
  18 class KeyEvent;
  19 }
  20
  21 namespace wm {
  22
  23 class NestedAcceleratorDelegate;
  24
  25 // Dispatcher for handling accelerators from menu.
  26 //
  27 // Wraps a nested dispatcher to which control is passed if no accelerator key
  28 // has been pressed. If the nested dispatcher is NULL, then the control is
  29 // passed back to the default dispatcher.
  30 // TODO(pkotwicz): Add support for a |nested_dispatcher| which sends
  31 //  events to a system IME.
  32 class WM_EXPORT NestedAcceleratorDispatcher {
  33  public:
  34   virtual ~NestedAcceleratorDispatcher();
  35
  36   static scoped_ptr<NestedAcceleratorDispatcher> Create(
  37       NestedAcceleratorDelegate* dispatcher_delegate,
  38       base::MessagePumpDispatcher* nested_dispatcher);
  39
  40   // Creates a base::RunLoop object to run a nested message loop.
  41   virtual scoped_ptr<base::RunLoop> CreateRunLoop() = 0;
  42
  43  protected:
  44   explicit NestedAcceleratorDispatcher(NestedAcceleratorDelegate* delegate);
  45
  46   NestedAcceleratorDelegate*
  47       delegate_;  // Owned by NestedAcceleratorController.
  48
  49  private:
  50   DISALLOW_COPY_AND_ASSIGN(NestedAcceleratorDispatcher);
  51 };
  52
  53 }  // namespace wm
  54
  55 #endif  // UI_WM_CORE_NESTED_ACCELERATOR_DISPATCHER_H_