widget/windows/nsToolkit.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #ifndef nsToolkit_h__
   7 #define nsToolkit_h__
   8
   9 #include "nsdefs.h"
  10
  11 #include "nsITimer.h"
  12 #include "nsCOMPtr.h"
  13 #include <windows.h>
  14
  15 // Avoid including windowsx.h to prevent macro pollution
  16 #ifndef GET_X_LPARAM
  17 #define GET_X_LPARAM(pt) (short(LOWORD(pt)))
  18 #endif
  19 #ifndef GET_Y_LPARAM
  20 #define GET_Y_LPARAM(pt) (short(HIWORD(pt)))
  21 #endif
  22
  23 /**
  24  * Makes sure exit/enter mouse messages are always dispatched.
  25  * In the case where the mouse has exited the outer most window the
  26  * only way to tell if it has exited is to set a timer and look at the
  27  * mouse pointer to see if it is within the outer most window.
  28  */
  29
  30 class MouseTrailer
  31 {
  32 public:
  33     HWND                  GetMouseTrailerWindow() { return mMouseTrailerWindow; }
  34     HWND                  GetCaptureWindow() { return mCaptureWindow; }
  35
  36     void                  SetMouseTrailerWindow(HWND aWnd);
  37     void                  SetCaptureWindow(HWND aWnd);
  38     void                  Disable() { mEnabled = false; DestroyTimer(); }
  39     void                  Enable() { mEnabled = true; CreateTimer(); }
  40     void                  DestroyTimer();
  41
  42                           MouseTrailer();
  43                           ~MouseTrailer();
  44 private:
  45
  46     nsresult              CreateTimer();
  47
  48     static void           TimerProc(nsITimer* aTimer, void* aClosure);
  49
  50     // Information for mouse enter/exit events
  51     HWND                  mMouseTrailerWindow;
  52     HWND                  mCaptureWindow;
  53     bool                  mIsInCaptureMode;
  54     bool                  mEnabled;
  55     nsCOMPtr<nsITimer>    mTimer;
  56 };
  57
  58 /**
  59  * Wrapper around the thread running the message pump.
  60  * The toolkit abstraction is necessary because the message pump must
  61  * execute within the same thread that created the widget under Win32.
  62  */
  63
  64 class nsToolkit
  65 {
  66 public:
  67     nsToolkit();
  68
  69 private:
  70     ~nsToolkit();
  71
  72 public:
  73     static nsToolkit* GetToolkit();
  74
  75     static HINSTANCE mDllInstance;
  76     static MouseTrailer *gMouseTrailer;
  77
  78     static void Startup(HMODULE hModule);
  79     static void Shutdown();
  80     static void StartAllowingD3D9();
  81
  82 protected:
  83     static nsToolkit* gToolkit;
  84
  85     nsCOMPtr<nsITimer> mD3D9Timer;
  86     MouseTrailer mMouseTrailer;
  87 };
  88
  89 #endif  // TOOLKIT_H