//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this sample source code is subject to the terms of the Microsoft
// license agreement under which you licensed this sample source code. If
// you did not accept the terms of the license agreement, you are not
// authorized to use this sample source code. For the terms of the license,
// please see the license agreement between you and Microsoft or, if applicable,
// see the LICENSE.RTF on your install media or the root of your tools installation.
// THE SAMPLE SOURCE CODE IS PROVIDED "AS IS", WITH NO WARRANTIES.
//
/*++

TCHWND
--*/

#include    <windows.h>
#include	<tchar.h>
#include	<types.h>

//#include	   "debug.h"
#include	   "pegc_def.h"
#include    "tchddi.h"

#ifdef __cplusplus
extern "C"{
#endif 
#include    "tchstub.h"

// Local and external functions
HWND	FindForegroundFocusWindow(HWND hForegroundWnd);
LRESULT CALLBACK TchStubWndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam);
void TouchCreateEventInternal(int begX, int begY);
void
StubCallback2(
	DWORD dwtick0,
   TOUCH_PANEL_SAMPLE_FLAGS	Flags,
	INT	X,
	INT	Y
    );


DWORD WINAPI TchWindowThread(DWORD dwParameter)
{
 WNDCLASSW wc;
 HWND hWnd;
 MSG msg;
 HANDLE	hInst = reinterpret_cast<HANDLE>(dwParameter);

   wc.style = 0; //CS_HREDRAW | CS_VREDRAW; //|  CS_DBLCLKS;
   wc.lpfnWndProc = (WNDPROC) TchStubWndProc;
   wc.cbClsExtra = 0;
   wc.cbWndExtra = 0;
   wc.hInstance = reinterpret_cast<HINSTANCE>(hInst);
   wc.hIcon = 0;
   wc.hCursor = 0;
   wc.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
   wc.lpszMenuName = 0;
   wc.lpszClassName = TOUCHSTUB_WNDCLASSNAME;
   Sleep(4000);
   if (RegisterClass(&wc) == FALSE ) 
      {
     	  MYERRORMSG(1,
			(TEXT("Could not register window class for TouchStub Window.\r\n")));
         return 0;
      }

   if((hWnd=CreateWindowEx(0, TOUCHSTUB_WNDCLASSNAME, L"", 0,
             0, 0, 1 , 1, NULL, NULL, reinterpret_cast<HINSTANCE>(hInst), NULL))==0)
      {
		   MYERRORMSG(1,
			   (TEXT("Could not create TouchStub Window.\r\n")));
         return 0;
      }
   ShowWindow(hWnd, SW_HIDE);   

   // GetMessage will return false when the message-signalling object is destroyed by GWES.
   // Then this thread will exit.
   while(1)
      {
         if(GetMessage(&msg, NULL, 0, 0) == FALSE) 
            break;
         TranslateMessage(&msg);
         DispatchMessage(&msg);
      }
   return 0;
}


// The point of this routine is to get the focus window in the client proc (ie, pWord, etc).
//
//  Since the Focus window of the foreground proc is not the same as the foreground window, we do this by
//  creating a window parented to the foreground window, then calling GetFocus() on that window, then
//  destroying the temp window we created.
//  If creating the window fails, we return hForegroundWnd - not perfect, but the best we can do.
//  The GWE lead developer warns that this could break with future versions of the OS.  The alternative is to //  sublcass the foreground wnd, then on that subclassed thread check to see who has focus, then
//  undo the sublcass, returning the result (the code used to do that).
HWND	FindForegroundFocusWindow(HWND hForegroundWnd)
{
	HWND	hWndFocus;
	HWND	hTempWindow;

	// create a window, any window, parented to hForegroundWnd
	hTempWindow = CreateWindowEx(0, TOUCHSTUB_WNDCLASSNAME, L"", 0,
                                 0, 0, 1 , 1, hForegroundWnd, NULL, 
                                 reinterpret_cast<HINSTANCE>(*_phinstDll), NULL);

	if (NULL == hTempWindow)
		return hForegroundWnd;

	// this works because creating a window parented to hForegroundWindow joins the 
	//  input contexts of the message queues temporarily, so we can find which
	//  child of the foreground wnd actually has the focus using the standard API call.
	hWndFocus = GetFocus();

	// destroying the window disconnects my thread input context from the foreground thread
	DestroyWindow(hTempWindow);

	return hWndFocus;

}


LRESULT CALLBACK TchStubWndProc (HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
  switch (message) 
   {
      case WM_CLOSE:
         return 0;
      case WM_STUB_TABLET:
         StubCallback2(wParam, (TOUCH_PANEL_SAMPLE_FLAGS)(lParam>>26), ((lParam>>13)&0x01FFF), (lParam&0x01FFF));
         break;

      case WM_STUB_GETVERSION:
         return (CGRTOUCH_MAJOR_VERSION*10000+CGRTOUCH_MINOR_VERSION*100+CGRTOUCH_RELEASE);
         //_iTouchStubVersion;

      case WM_STUB_GETLASTTOUCHFOCUSWND:
         return (LRESULT)_hLastTouchFocusWnd;

	  // go to the client process (pWord, etc) and see who has focus there (set _hLastTouchFocusWnd to answer)
      case WM_STUB_GETFOCUSWND:
         {
            HWND hFgrWnd = GetForegroundWindow();

			// if there is no foreground window, no need to go further
            if(hFgrWnd==NULL || !IsWindow(hFgrWnd))
			{
                _hLastTouchFocusWnd = NULL;
                return 0;
			}
			// default to the foreground window in case the explorer has focus
            _hLastTouchFocusWnd = hFgrWnd;	
            
			// if the explorer has focus, return
            TCHAR szClass[128];
            GetClassName( hWnd, szClass, 127);
            if(_tcscmp(szClass, L"DesktopExplorerWindow")==0)
                return 0;

			// Call our routine to find the focus window
			_hLastTouchFocusWnd = FindForegroundFocusWindow(hFgrWnd);
			return reinterpret_cast<long>(_hLastTouchFocusWnd);
		 }
			

      case WM_STUB_EVENT:
         TouchCreateEventInternal((int)wParam, (int)lParam);
         return TRUE;

      case WM_STUB_REGISTWND:
         _hClientWnd = (HWND)wParam;

#ifdef DEBUGTOUCH
         // Show the debug message next time touch driver performance is below.
         _bNoDbgMsg = FALSE;
#endif // DEBUGTOUCH

         return TRUE;
      case WM_STUB_UNREGISTWND:
         if(_hClientWnd == (HWND)wParam)
            _hClientWnd = NULL;

#ifdef DEBUGTOUCH
         // Show the debug message next time touch driver performance is below.
         _bNoDbgMsg = FALSE;
#endif // DEBUGTOUCH

         break;
      case WM_STUB_SETVALUE:
         switch(wParam)
            {
               case STUB_LAST_CLICKTIME:
                  _dwLastSendedTick = lParam;
                  break;
               case STUB_VALUE_REGWND:
                  break;
               case STUB_VALUE_STUBWND:
                  break;
               case STUB_MIN_PAUSE_BEFORE_CLICK:
                  dwMinPauseBeforeClick = lParam;
                  break;
               case STUB_MAX_CLICK_DIST:
                  iMaxClickDist = lParam;
                  break;
               case STUB_MAX_CLICK_TIME:
                  dwMaxClickTime = lParam;
                  break;
               case STUB_MAX_DELAY_DIST:
                  iMaxDelayDist = lParam;
                  break;
               case STUB_MIN_START_DELAY_TIME:
                  dwMinStartDelayTime = lParam;
                  break;
               case STUB_MIN_INTER_DELAY_TIME:
                  dwMinInterDelayTime = lParam;
                  break;
            }
         break;
      case WM_STUB_GETVALUE:
         switch(wParam)
            {
               case STUB_VALUE_REGWND:
                  return (LRESULT)_hClientWnd;
               case STUB_VALUE_STUBWND:
                  return (LRESULT)*_phStubWnd;
               case STUB_MIN_PAUSE_BEFORE_CLICK:
                  return dwMinPauseBeforeClick;
               case STUB_MAX_CLICK_DIST:
                  return iMaxClickDist;
               case STUB_MAX_CLICK_TIME:
                  return dwMaxClickTime;
               case STUB_MAX_DELAY_DIST:
                  return iMaxDelayDist;
               case STUB_MIN_START_DELAY_TIME:
                  return dwMinStartDelayTime;
               case STUB_MIN_INTER_DELAY_TIME:
                  return dwMinInterDelayTime;
               default:
                  return 0;
            }
         break;
      case WM_STUB_RESET:
         if(wParam)
            {
               dwMinPauseBeforeClick         =  1500;
               iMaxClickDist                 =  23;
               iMaxDelayDist                 =  18;
               dwMaxClickTime                =  480;
               dwMinStartDelayTime           =  480;
               dwMinInterDelayTime           =  800;
            }
         _dwLastSendedTick = 0;

      default : return DefWindowProc(hWnd, message, wParam, lParam);
   }

  return DefWindowProc(hWnd, message, wParam, lParam);
}


#ifdef __cplusplus
   }
#endif //ifdef __cplusplus