remoting/host/win/message_window.h

   1 // Copyright 2013 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 REMOTING_HOST_WIN_MESSAGE_WINDOW_H_
   6 #define REMOTING_HOST_WIN_MESSAGE_WINDOW_H_
   7
   8 #include <windows.h>
   9
  10 #include <string>
  11
  12 #include "base/basictypes.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/threading/non_thread_safe.h"
  15
  16 namespace remoting {
  17 namespace win {
  18
  19 // Implements a message-only window.
  20 class MessageWindow : base::NonThreadSafe {
  21  public:
  22   // Handles incoming window messages.
  23   class Delegate {
  24    public:
  25     virtual ~Delegate() {}
  26
  27     virtual bool HandleMessage(HWND hwnd,
  28                                UINT message,
  29                                WPARAM wparam,
  30                                LPARAM lparam,
  31                                LRESULT* result) = 0;
  32   };
  33
  34   MessageWindow();
  35   MessageWindow(const std::string& class_name, HINSTANCE instance);
  36   ~MessageWindow();
  37
  38   // Registers the window class and creates the window. The incoming messages
  39   // will be handled by |delegate|. |delegate| must outlive |this|.
  40   bool Create(Delegate* delegate);
  41
  42   HWND hwnd() const { return window_; }
  43
  44  private:
  45   // Invoked by the OS to process incoming window messages.
  46   static LRESULT CALLBACK WindowProc(HWND hwnd, UINT message, WPARAM wparam,
  47                                      LPARAM lparam);
  48
  49   // Atom representing the registered window class.
  50   ATOM atom_;
  51
  52   // MessageWindow class name.
  53   std::string class_name_;
  54
  55   // Instance of the module containing the window procedure.
  56   HINSTANCE instance_;
  57
  58   // Handle of the input window.
  59   HWND window_;
  60
  61   DISALLOW_COPY_AND_ASSIGN(MessageWindow);
  62 };
  63
  64 }  // namespace win
  65 }  // namespace remoting
  66
  67 #endif  // REMOTING_HOST_WIN_MESSAGE_WINDOW_H_