ui/wm/public/dispatcher_client.h

   1 // Copyright (c) 2012 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_PUBLIC_DISPATCHER_CLIENT_H_
   6 #define UI_WM_PUBLIC_DISPATCHER_CLIENT_H_
   7
   8 #include "base/callback.h"
   9 #include "base/macros.h"
  10 #include "base/message_loop/message_pump_dispatcher.h"
  11 #include "ui/aura/aura_export.h"
  12
  13 namespace aura {
  14 class Window;
  15 namespace client {
  16
  17 class DispatcherClient;
  18
  19 // A base::RunLoop like object for running a nested message-loop with a
  20 // specified DispatcherClient and a MessagePumpDispatcher.
  21 class AURA_EXPORT DispatcherRunLoop {
  22  public:
  23   DispatcherRunLoop(DispatcherClient* client,
  24                     base::MessagePumpDispatcher* dispatcher);
  25   ~DispatcherRunLoop();
  26
  27   void Run();
  28   base::Closure QuitClosure();
  29   void Quit();
  30
  31  private:
  32   base::Closure run_closure_;
  33   base::Closure quit_closure_;
  34
  35   DISALLOW_COPY_AND_ASSIGN(DispatcherRunLoop);
  36 };
  37
  38 // An interface implemented by an object which handles nested dispatchers.
  39 class AURA_EXPORT DispatcherClient {
  40  public:
  41   virtual ~DispatcherClient() {}
  42
  43  protected:
  44   friend class DispatcherRunLoop;
  45
  46   virtual void PrepareNestedLoopClosures(
  47       base::MessagePumpDispatcher* dispatcher,
  48       base::Closure* run_closure,
  49       base::Closure* quit_closure) = 0;
  50 };
  51
  52 AURA_EXPORT void SetDispatcherClient(Window* root_window,
  53                                      DispatcherClient* client);
  54 AURA_EXPORT DispatcherClient* GetDispatcherClient(Window* root_window);
  55
  56 }  // namespace client
  57 }  // namespace aura
  58
  59 #endif  // UI_WM_PUBLIC_DISPATCHER_CLIENT_H_