//
// "$Id: Fl_win32.cxx 6553 2008-12-07 11:05:41Z AlbrechtS $"
//
// WIN32-specific code for the Fast Light Tool Kit (FLTK).
//
// Copyright 1998-2007 by Bill Spitzak and others.
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Library General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Library General Public License for more details.
//
// You should have received a copy of the GNU Library General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
// USA.
//
// Please report all bugs and problems on the following page:
//
//     http://www.fltk.org/str.php
//

// This file contains win32-specific code for fltk which is always linked
// in.  Search other files for "WIN32" or filenames ending in _win32.cxx
// for other system-specific code.

#include <FL/Fl.H>
#include <FL/x.H>
#include <FL/Fl_Window.H>
#include <FL/Enumerations.H>
#include <FL/Fl_Tooltip.H>
#include "flstring.h"
#include "Fl_Font.H"
#include <stdio.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#ifdef __CYGWIN__
#  include <sys/time.h>
#  include <unistd.h>
#else
#  include <winsock.h>
#endif
#include <winuser.h>
#include <commctrl.h>

// The following include files require GCC 3.x or a non-GNU compiler...
#if !defined(__GNUC__) || __GNUC__ >= 3
#  include <ole2.h>
#  include <shellapi.h>
#endif // !__GNUC__ || __GNUC__ >= 3


//
// USE_ASYNC_SELECT - define it if you have WSAAsyncSelect()...
//
// This currently doesn't appear to work; needs to be fixed!
//

//#define USE_ASYNC_SELECT

// USE_TRACK_MOUSE - define NO_TRACK_MOUSE if you don't have
// TrackMouseEvent()...
//
// Now (Dec. 2008) we can assume that current Cygwin/MinGW versions
// support the TrackMouseEvent() function, but WinCE obviously doesn't
// support it (STR 2095). Therefore, USE_TRACK_MOUSE is enabled by 
// default, but you can disable it by defining NO_TRACK_MOUSE.
//
// TrackMouseEvent is only used to support window leave notifications
// under Windows. It can be used to get FL_LEAVE events, when the
// mouse leaves the _main_ application window (FLTK detects subwindow
// leave events by using normal move events).
//
// Implementation note: If the mouse cursor leaves one subwindow and
// enters another window, then Windows sends a WM_MOUSEMOVE message to
// the new window before it sends a WM_MOUSELEAVE message to the old
// (just left) window. We save the current mouse window in a static variable,
// and if we get a WM_MOUSELEAVE event for the current mouse window, this
// means that the top level window has been left (otherwise we would have
// got another WM_MOUSEMOVE message before).

// #define NO_TRACK_MOUSE

#if !defined(NO_TRACK_MOUSE)
# define USE_TRACK_MOUSE
#endif // NO_TRACK_MOUSE

static Fl_Window *track_mouse_win=0;	// current TrackMouseEvent() window

// USE_CAPTURE_MOUSE_WIN - this must be defined for TrackMouseEvent to work
// correctly with subwindows - otherwise a single mouse click and release
// (without a move) would generate phantom leave events.
// This defines, if the current mouse window (maybe a subwindow) or the 
// main window should get mouse events after pushing (and holding) a mouse
// button, i.e. when dragging the mouse. This is done by calling SetCapture
// (see below).

#ifdef USE_TRACK_MOUSE
#define USE_CAPTURE_MOUSE_WIN
#endif // USE_TRACK_MOUSE

//
// WM_SYNCPAINT is an "undocumented" message, which is finally defined in
// VC++ 6.0.
//

#ifndef WM_SYNCPAINT
#  define WM_SYNCPAINT 0x0088
#endif

#ifndef WM_MOUSELEAVE
#  define WM_MOUSELEAVE 0x02a3
#endif

#ifndef WM_MOUSEWHEEL
#  define WM_MOUSEWHEEL 0x020a
#endif

#ifndef WHEEL_DELTA
#  define WHEEL_DELTA 120	// according to MSDN.
#endif


//
// WM_FLSELECT is the user-defined message that we get when one of
// the sockets has pending data, etc.
//

#define WM_FLSELECT	(WM_APP+1)	// WM_APP is used for hide-window


////////////////////////////////////////////////////////////////
// interface to poll/select call:

// fd's are only implemented for sockets.  Microsoft Windows does not
// have a unified IO system, so it doesn't support select() on files,
// devices, or pipes...
//
// Microsoft provides the Berkeley select() call and an asynchronous
// select function that sends a WIN32 message when the select condition
// exists...
static int maxfd = 0;
#ifndef USE_ASYNC_SELECT
static fd_set fdsets[3];
#endif // !USE_ASYNC_SELECT

#define POLLIN 1
#define POLLOUT 4
#define POLLERR 8

#if !defined(__GNUC__) || __GNUC__ >= 3
extern IDropTarget *flIDropTarget;
#endif // !__GNUC__ || __GNUC__ >= 3

static int nfds = 0;
static int fd_array_size = 0;
static struct FD {
  int fd;
  short events;
  void (*cb)(int, void*);
  void* arg;
} *fd = 0;

void Fl::add_fd(int n, int events, void (*cb)(int, void*), void *v) {
  remove_fd(n,events);
  int i = nfds++;
  if (i >= fd_array_size) {
    fd_array_size = 2*fd_array_size+1;
    fd = (FD*)realloc(fd, fd_array_size*sizeof(FD));
  }
  fd[i].fd = n;
  fd[i].events = (short)events;
  fd[i].cb = cb;
  fd[i].arg = v;

#ifdef USE_ASYNC_SELECT
  int mask = 0;
  if (events & POLLIN) mask |= FD_READ;
  if (events & POLLOUT) mask |= FD_WRITE;
  if (events & POLLERR) mask |= FD_CLOSE;
  WSAAsyncSelect(n, fl_window, WM_FLSELECT, mask);
#else
  if (events & POLLIN) FD_SET((unsigned)n, &fdsets[0]);
  if (events & POLLOUT) FD_SET((unsigned)n, &fdsets[1]);
  if (events & POLLERR) FD_SET((unsigned)n, &fdsets[2]);
  if (n > maxfd) maxfd = n;
#endif // USE_ASYNC_SELECT
}

void Fl::add_fd(int fd, void (*cb)(int, void*), void* v) {
  Fl::add_fd(fd, POLLIN, cb, v);
}

void Fl::remove_fd(int n, int events) {
  int i,j;
  for (i=j=0; i<nfds; i++) {
    if (fd[i].fd == n) {
      short e = fd[i].events & ~events;
      if (!e) continue; // if no events left, delete this fd
      fd[i].events = e;
    }
    // move it down in the array if necessary:
    if (j<i) {
      fd[j]=fd[i];
    }
    j++;
  }
  nfds = j;

#ifdef USE_ASYNC_SELECT
  WSAAsyncSelect(n, 0, 0, 0);
#else
  if (events & POLLIN) FD_CLR(unsigned(n), &fdsets[0]);
  if (events & POLLOUT) FD_CLR(unsigned(n), &fdsets[1]);
  if (events & POLLERR) FD_CLR(unsigned(n), &fdsets[2]);
#endif // USE_ASYNC_SELECT
}

void Fl::remove_fd(int n) {
  remove_fd(n, -1);
}

// these pointers are set by the Fl::lock() function:
static void nothing() {}
void (*fl_lock_function)() = nothing;
void (*fl_unlock_function)() = nothing;

static void* thread_message_;
void* Fl::thread_message() {
  void* r = thread_message_;
  thread_message_ = 0;
  return r;
}

MSG fl_msg;

// This is never called with time_to_wait < 0.0.
// It *should* return negative on error, 0 if nothing happens before
// timeout, and >0 if any callbacks were done.  This version only
// returns zero if nothing happens during a 0.0 timeout, otherwise
// it returns 1.
int fl_wait(double time_to_wait) {
  int have_message = 0;

  run_checks();

  // idle processing
  static char in_idle;
  if (Fl::idle && !in_idle) {
    in_idle = 1;
    Fl::idle();
    in_idle = 0;
  }
  
#ifndef USE_ASYNC_SELECT
  if (nfds) {
    // For WIN32 we need to poll for socket input FIRST, since
    // the event queue is not something we can select() on...
    timeval t;
    t.tv_sec = 0;
    t.tv_usec = 0;

    fd_set fdt[3];
    fdt[0] = fdsets[0];
    fdt[1] = fdsets[1];
    fdt[2] = fdsets[2];
    if (::select(maxfd+1,&fdt[0],&fdt[1],&fdt[2],&t)) {
      // We got something - do the callback!
      for (int i = 0; i < nfds; i ++) {
	int f = fd[i].fd;
	short revents = 0;
	if (FD_ISSET(f,&fdt[0])) revents |= POLLIN;
	if (FD_ISSET(f,&fdt[1])) revents |= POLLOUT;
	if (FD_ISSET(f,&fdt[2])) revents |= POLLERR;
	if (fd[i].events & revents) fd[i].cb(f, fd[i].arg);
      }
      time_to_wait = 0.0; // just peek for any messages
    } else {
      // we need to check them periodically, so set a short timeout:
      if (time_to_wait > .001) time_to_wait = .001;
    }
  }
#endif // USE_ASYNC_SELECT

  if (Fl::idle || Fl::damage()) 
    time_to_wait = 0.0;

  // if there are no more windows and this timer is set
  // to FOREVER, continue through or look up indefinetely
  if (!Fl::first_window() && time_to_wait==1e20)
    time_to_wait = 0.0;

  fl_unlock_function();

  time_to_wait = (time_to_wait > 10000 ? 10000 : time_to_wait);
  int t_msec = (int) (time_to_wait * 1000.0 + 0.5);
  MsgWaitForMultipleObjects(0, NULL, FALSE, t_msec, QS_ALLINPUT);

  fl_lock_function();

  // Execute the message we got, and all other pending messages:
  have_message = PeekMessage(&fl_msg, NULL, 0, 0, PM_REMOVE);
  if (have_message > 0) {
    while (have_message != 0 && have_message != -1) {
#ifdef USE_ASYNC_SELECT
      if (fl_msg.message == WM_FLSELECT) {
	// Got notification for socket
	for (int i = 0; i < nfds; i ++)
          if (fd[i].fd == (int)fl_msg.wParam) {
	    (fd[i].cb)(fd[i].fd, fd[i].arg);
	    break;
	  }
	// looks like it is best to do the dispatch-message anyway:
      }
#endif

      if (fl_msg.message == fl_wake_msg) {
        // Used for awaking wait() from another thread
	thread_message_ = (void*)fl_msg.wParam;
        Fl_Awake_Handler func;
        void *data;
        while (Fl::get_awake_handler_(func, data)==0) {
          func(data);
        }
      }

      TranslateMessage(&fl_msg);
      DispatchMessage(&fl_msg);
      have_message = PeekMessage(&fl_msg, NULL, 0, 0, PM_REMOVE);
    }
  }
  Fl::flush();

  // This should return 0 if only timer events were handled:
  return 1;
}

// fl_ready() is just like fl_wait(0.0) except no callbacks are done:
int fl_ready() {
  if (PeekMessage(&fl_msg, NULL, 0, 0, PM_NOREMOVE)) return 1;
#ifdef USE_ASYNC_SELECT
  return 0;
#else
  timeval t;
  t.tv_sec = 0;
  t.tv_usec = 0;
  fd_set fdt[3];
  fdt[0] = fdsets[0];
  fdt[1] = fdsets[1];
  fdt[2] = fdsets[2];
  return ::select(0,&fdt[0],&fdt[1],&fdt[2],&t);
#endif // USE_ASYNC_SELECT
}

////////////////////////////////////////////////////////////////

int Fl::x()
{
  RECT r;

  SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
  return r.left;
}

int Fl::y()
{
  RECT r;

  SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
  return r.top;
}

int Fl::h()
{
  RECT r;

  SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
  return r.bottom - r.top;
}

int Fl::w()
{
  RECT r;

  SystemParametersInfo(SPI_GETWORKAREA, 0, &r, 0);
  return r.right - r.left;
}

void Fl::get_mouse(int &x, int &y) {
  POINT p;
  GetCursorPos(&p);
  x = p.x;
  y = p.y;
}

////////////////////////////////////////////////////////////////
// code used for selections:

char *fl_selection_buffer[2];
int fl_selection_length[2];
int fl_selection_buffer_length[2];
char fl_i_own_selection[2];

// Convert \n -> \r\n
class Lf2CrlfConvert {
  char *out;
  int outlen;
public:
  Lf2CrlfConvert(const char *in, int inlen) {
    outlen = 0;
    const char *i;
    char *o;
    int lencount;
    // Predict size of \r\n conversion buffer
    for ( i=in, lencount = inlen; lencount--; ) {
      if ( *i == '\r' && *(i+1) == '\n' )	// leave \r\n untranslated
	{ i+=2; outlen+=2; }
      else if ( *i == '\n' )			// \n by itself? leave room to insert \r
	{ i++; outlen+=2; }
      else
	{ ++i; ++outlen; }
    }
    // Alloc conversion buffer + NULL
    out = new char[outlen+1];
    // Handle \n -> \r\n conversion
    for ( i=in, o=out, lencount = inlen; lencount--; ) {
      if ( *i == '\r' && *(i+1) == '\n' )	// leave \r\n untranslated
        { *o++ = *i++; *o++ = *i++; }
      else if ( *i == '\n' )			// \n by itself? insert \r
        { *o++ = '\r'; *o++ = *i++; }
      else
        { *o++ = *i++; }
    }
    *o++ = 0;
  }
  ~Lf2CrlfConvert() {
    delete[] out;
  }
  int GetLength() const { return(outlen); }
  const char* GetValue() const { return(out); }
};

// call this when you create a selection:
void Fl::copy(const char *stuff, int len, int clipboard) {
  if (!stuff || len<0) return;

  // Convert \n -> \r\n (for old apps like Notepad, DOS)
  Lf2CrlfConvert buf(stuff, len);
  len = buf.GetLength();
  stuff = buf.GetValue();

  if (len+1 > fl_selection_buffer_length[clipboard]) {
    delete[] fl_selection_buffer[clipboard];
    fl_selection_buffer[clipboard] = new char[len+100];
    fl_selection_buffer_length[clipboard] = len+100;
  }
  memcpy(fl_selection_buffer[clipboard], stuff, len);
  fl_selection_buffer[clipboard][len] = 0; // needed for direct paste
  fl_selection_length[clipboard] = len;
  if (clipboard) {
    // set up for "delayed rendering":
    if (OpenClipboard(fl_xid(Fl::first_window()))) {
      // if the system clipboard works, use it
      EmptyClipboard();
      SetClipboardData(CF_TEXT, NULL);
      CloseClipboard();
      fl_i_own_selection[clipboard] = 0;
    } else {
      // only if it fails, instruct paste() to use the internal buffers
      fl_i_own_selection[clipboard] = 1;
    }
  }
}

// Call this when a "paste" operation happens:
void Fl::paste(Fl_Widget &receiver, int clipboard) {
  if (!clipboard || fl_i_own_selection[clipboard]) {
    // We already have it, do it quickly without window server.
    // Notice that the text is clobbered if set_selection is
    // called in response to FL_PASTE!

    // Convert \r\n -> \n
    char *i = fl_selection_buffer[clipboard];
    if (i==0L) {
      Fl::e_text = 0; 
      return;
    }
    Fl::e_text = new char[fl_selection_length[clipboard]+1];
    char *o = Fl::e_text;
    while (*i) {
      if ( *i == '\r' && *(i+1) == '\n') i++;
      else *o++ = *i++;
    }
    *o = 0;
    Fl::e_length = o - Fl::e_text;
    receiver.handle(FL_PASTE);
    delete [] Fl::e_text;
    Fl::e_text = 0;
  } else {
    if (!OpenClipboard(NULL)) return;
    HANDLE h = GetClipboardData(CF_TEXT);
    if (h) {
      Fl::e_text = (LPSTR)GlobalLock(h);
      LPSTR a,b;
      a = b = Fl::e_text;
      while (*a) { // strip the CRLF pairs ($%$#@^)
	if (*a == '\r' && a[1] == '\n') a++;
	else *b++ = *a++;
      }
      *b = 0;
      Fl::e_length = b - Fl::e_text;
      receiver.handle(FL_PASTE);
      GlobalUnlock(h);
    }
    CloseClipboard();
  }
}

////////////////////////////////////////////////////////////////

HWND fl_capture;

static int mouse_event(Fl_Window *window, int what, int button,
			WPARAM wParam, LPARAM lParam)
{
  static int px, py, pmx, pmy;
  POINT pt;
  Fl::e_x = pt.x = (signed short)LOWORD(lParam);
  Fl::e_y = pt.y = (signed short)HIWORD(lParam);
  ClientToScreen(fl_xid(window), &pt);
  Fl::e_x_root = pt.x;
  Fl::e_y_root = pt.y;
#ifdef USE_CAPTURE_MOUSE_WIN
  Fl_Window *mouse_window = window;	// save "mouse window"
#endif
  while (window->parent()) {
    Fl::e_x += window->x();
    Fl::e_y += window->y();
    window = window->window();
  }

  ulong state = Fl::e_state & 0xff0000; // keep shift key states
#if 0
  // mouse event reports some shift flags, perhaps save them?
  if (wParam & MK_SHIFT) state |= FL_SHIFT;
  if (wParam & MK_CONTROL) state |= FL_CTRL;
#endif
  if (wParam & MK_LBUTTON) state |= FL_BUTTON1;
  if (wParam & MK_MBUTTON) state |= FL_BUTTON2;
  if (wParam & MK_RBUTTON) state |= FL_BUTTON3;
  Fl::e_state = state;

  switch (what) {
  case 1: // double-click
    if (Fl::e_is_click) {Fl::e_clicks++; goto J1;}
  case 0: // single-click
    Fl::e_clicks = 0;
  J1:
#ifdef USE_CAPTURE_MOUSE_WIN
    if (!fl_capture) SetCapture(fl_xid(mouse_window));  // use mouse window
#else
    if (!fl_capture) SetCapture(fl_xid(window));	// use main window
#endif
    Fl::e_keysym = FL_Button + button;
    Fl::e_is_click = 1;
    px = pmx = Fl::e_x_root; py = pmy = Fl::e_y_root;
    return Fl::handle(FL_PUSH,window);

  case 2: // release:
    if (!fl_capture) ReleaseCapture();
    Fl::e_keysym = FL_Button + button;
    return Fl::handle(FL_RELEASE,window);

  case 3: // move:
  default: // avoid compiler warning
    // MSWindows produces extra events even if mouse does not move, ignore em:
    if (Fl::e_x_root == pmx && Fl::e_y_root == pmy) return 1;
    pmx = Fl::e_x_root; pmy = Fl::e_y_root;
    if (abs(Fl::e_x_root-px)>5 || abs(Fl::e_y_root-py)>5) Fl::e_is_click = 0;
    return Fl::handle(FL_MOVE,window);

  }
}

// convert a MSWindows VK_x to an Fltk (X) Keysym:
// See also the inverse converter in Fl_get_key_win32.cxx
// This table is in numeric order by VK:
static const struct {unsigned short vk, fltk, extended;} vktab[] = {
  {VK_BACK,	FL_BackSpace},
  {VK_TAB,	FL_Tab},
  {VK_CLEAR,	FL_KP+'5',	0xff0b/*XK_Clear*/},
  {VK_RETURN,	FL_Enter,	FL_KP_Enter},
  {VK_SHIFT,	FL_Shift_L,	FL_Shift_R},
  {VK_CONTROL,	FL_Control_L,	FL_Control_R},
  {VK_MENU,	FL_Alt_L,	FL_Alt_R},
  {VK_PAUSE,	FL_Pause},
  {VK_CAPITAL,	FL_Caps_Lock},
  {VK_ESCAPE,	FL_Escape},
  {VK_SPACE,	' '},
  {VK_PRIOR,	FL_KP+'9',	FL_Page_Up},
  {VK_NEXT,	FL_KP+'3',	FL_Page_Down},
  {VK_END,	FL_KP+'1',	FL_End},
  {VK_HOME,	FL_KP+'7',	FL_Home},
  {VK_LEFT,	FL_KP+'4',	FL_Left},
  {VK_UP,	FL_KP+'8',	FL_Up},
  {VK_RIGHT,	FL_KP+'6',	FL_Right},
  {VK_DOWN,	FL_KP+'2',	FL_Down},
  {VK_SNAPSHOT,	FL_Print},	// does not work on NT
  {VK_INSERT,	FL_KP+'0',	FL_Insert},
  {VK_DELETE,	FL_KP+'.',	FL_Delete},
  {VK_LWIN,	FL_Meta_L},
  {VK_RWIN,	FL_Meta_R},
  {VK_APPS,	FL_Menu},
  {VK_MULTIPLY,	FL_KP+'*'},
  {VK_ADD,	FL_KP+'+'},
  {VK_SUBTRACT,	FL_KP+'-'},
  {VK_DECIMAL,	FL_KP+'.'},
  {VK_DIVIDE,	FL_KP+'/'},
  {VK_NUMLOCK,	FL_Num_Lock},
  {VK_SCROLL,	FL_Scroll_Lock},
  {0xba,	';'},
  {0xbb,	'='},
  {0xbc,	','},
  {0xbd,	'-'},
  {0xbe,	'.'},
  {0xbf,	'/'},
  {0xc0,	'`'},
  {0xdb,	'['},
  {0xdc,	'\\'},
  {0xdd,	']'},
  {0xde,	'\''}
};
static int ms2fltk(int vk, int extended) {
  static unsigned short vklut[256];
  static unsigned short extendedlut[256];
  if (!vklut[1]) { // init the table
    unsigned int i;
    for (i = 0; i < 256; i++) vklut[i] = tolower(i);
    for (i=VK_F1; i<=VK_F16; i++) vklut[i] = i+(FL_F-(VK_F1-1));
    for (i=VK_NUMPAD0; i<=VK_NUMPAD9; i++) vklut[i] = i+(FL_KP+'0'-VK_NUMPAD0);
    for (i = 0; i < sizeof(vktab)/sizeof(*vktab); i++) {
      vklut[vktab[i].vk] = vktab[i].fltk;
      extendedlut[vktab[i].vk] = vktab[i].extended;
    }
    for (i = 0; i < 256; i++) if (!extendedlut[i]) extendedlut[i] = vklut[i];
  }
  return extended ? extendedlut[vk] : vklut[vk];
}

#if USE_COLORMAP
extern HPALETTE fl_select_palette(void); // in fl_color_win32.cxx
#endif


/////////////////////////////////////////////////////////////////////////////
/// Win32 timers
///

struct Win32Timer
{
    UINT_PTR handle;
    Fl_Timeout_Handler callback;
    void *data;
};
static Win32Timer* win32_timers;
static int win32_timer_alloc;
static int win32_timer_used;
static HWND s_TimerWnd;

static void realloc_timers()
{
    if (win32_timer_alloc == 0) {
        win32_timer_alloc = 8;
    }
    win32_timer_alloc *= 2;
    Win32Timer* new_timers = new Win32Timer[win32_timer_alloc];
    memset(new_timers, 0, sizeof(Win32Timer) * win32_timer_used);
    memcpy(new_timers, win32_timers, sizeof(Win32Timer) * win32_timer_used);
    Win32Timer* delete_me = win32_timers;
    win32_timers = new_timers;
    delete [] delete_me;
}

static void delete_timer(Win32Timer& t)
{
    KillTimer(s_TimerWnd, t.handle);
    memset(&t, 0, sizeof(Win32Timer));
}

/// END TIMERS
/////////////////////////////////////////////////////////////////////////////

static Fl_Window* resize_bug_fix;

extern void fl_save_pen(void);
extern void fl_restore_pen(void);

static LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
  // Copy the message to fl_msg so add_handler code can see it, it is
  // already there if this is called by DispatchMessage, but not if
  // Windows calls this directly.
  fl_msg.hwnd = hWnd;
  fl_msg.message = uMsg;
  fl_msg.wParam = wParam;
  fl_msg.lParam = lParam;
  //fl_msg.time = ???
  //fl_msg.pt = ???
  //fl_msg.lPrivate = ???

  Fl_Window *window = fl_find(hWnd);

  if (window) switch (uMsg) {

  case WM_QUIT: // this should not happen?
    Fl::fatal("WM_QUIT message");

  case WM_CLOSE: // user clicked close box
    Fl::handle(FL_CLOSE, window);
    PostQuitMessage(0);
    return 0;

  case WM_SYNCPAINT :
  case WM_NCPAINT :
  case WM_ERASEBKGND :
    // Andreas Weitl - WM_SYNCPAINT needs to be passed to DefWindowProc
    // so that Windows can generate the proper paint messages...
    // Similarly, WM_NCPAINT and WM_ERASEBKGND need this, too...
    break;

  case WM_PAINT: {
    Fl_Region R;
    Fl_X *i = Fl_X::i(window);
    i->wait_for_expose = 0;
    char redraw_whole_window = false;
    if (!i->region && window->damage()) {
      // Redraw the whole window...
      i->region = CreateRectRgn(0, 0, window->w(), window->h());
      redraw_whole_window = true;
    }

    // We need to merge WIN32's damage into FLTK's damage.
    R = CreateRectRgn(0,0,0,0);
    int r = GetUpdateRgn(hWnd,R,0);
    if (r==NULLREGION && !redraw_whole_window) {
      break;
    }

    if (i->region) {
      // Also tell WIN32 that we are drawing someplace else as well...
      CombineRgn(i->region, i->region, R, RGN_OR);
      XDestroyRegion(R);
    } else {
      i->region = R;
    }
    if (window->type() == FL_DOUBLE_WINDOW) ValidateRgn(hWnd,0);
    else ValidateRgn(hWnd,i->region);

    window->clear_damage((uchar)(window->damage()|FL_DAMAGE_EXPOSE));
    // These next two statements should not be here, so that all update
    // is deferred until Fl::flush() is called during idle.  However WIN32
    // apparently is very unhappy if we don't obey it and draw right now.
    // Very annoying!
    fl_GetDC(hWnd); // Make sure we have a DC for this window...
    fl_save_pen();
    i->flush();
    fl_restore_pen();
    window->clear_damage();
    } return 0;

  case WM_LBUTTONDOWN:  mouse_event(window, 0, 1, wParam, lParam); return 0;
  case WM_LBUTTONDBLCLK:mouse_event(window, 1, 1, wParam, lParam); return 0;
  case WM_LBUTTONUP:    mouse_event(window, 2, 1, wParam, lParam); return 0;
  case WM_MBUTTONDOWN:  mouse_event(window, 0, 2, wParam, lParam); return 0;
  case WM_MBUTTONDBLCLK:mouse_event(window, 1, 2, wParam, lParam); return 0;
  case WM_MBUTTONUP:    mouse_event(window, 2, 2, wParam, lParam); return 0;
  case WM_RBUTTONDOWN:  mouse_event(window, 0, 3, wParam, lParam); return 0;
  case WM_RBUTTONDBLCLK:mouse_event(window, 1, 3, wParam, lParam); return 0;
  case WM_RBUTTONUP:    mouse_event(window, 2, 3, wParam, lParam); return 0;

  case WM_MOUSEMOVE:
#ifdef USE_TRACK_MOUSE
    if (track_mouse_win != window) {
      TRACKMOUSEEVENT tme;
      tme.cbSize    = sizeof(TRACKMOUSEEVENT);
      tme.dwFlags   = TME_LEAVE;
      tme.hwndTrack = hWnd;
      _TrackMouseEvent(&tme);
      track_mouse_win = window;
    }
#endif // USE_TRACK_MOUSE
    mouse_event(window, 3, 0, wParam, lParam);
    return 0;

  case WM_MOUSELEAVE:
    if (track_mouse_win == window) { // we left the top level window !
      Fl_Window *tw = window;
      while (tw->parent()) tw = tw->window(); // find top level window
      Fl::belowmouse(0);
      Fl::handle(FL_LEAVE, tw);
    }
    track_mouse_win = 0; // force TrackMouseEvent() restart
    break;

  case WM_SETFOCUS:
    Fl::handle(FL_FOCUS, window);
    break;

  case WM_KILLFOCUS:
    Fl::handle(FL_UNFOCUS, window);
    Fl::flush(); // it never returns to main loop when deactivated...
    break;

  case WM_SHOWWINDOW:
    if (!window->parent()) {
      Fl::handle(wParam ? FL_SHOW : FL_HIDE, window);
    }
    break;

  case WM_ACTIVATEAPP:
    // From eric@vfx.sel.sony.com, we should process WM_ACTIVATEAPP
    // messages to restore the correct state of the shift/ctrl/alt/lock
    // keys...  Added control, shift, alt, and meta keys, and changed
    // to use GetAsyncKeyState and do it when wParam is 1
    // (that means we have focus...)
    if (wParam)
    {
      ulong state = 0;
      if (GetAsyncKeyState(VK_CAPITAL)) state |= FL_CAPS_LOCK;
      if (GetAsyncKeyState(VK_NUMLOCK)) state |= FL_NUM_LOCK;
      if (GetAsyncKeyState(VK_SCROLL)) state |= FL_SCROLL_LOCK;
      if (GetAsyncKeyState(VK_CONTROL)&~1) state |= FL_CTRL;
      if (GetAsyncKeyState(VK_SHIFT)&~1) state |= FL_SHIFT;
      if (GetAsyncKeyState(VK_MENU)) state |= FL_ALT;
      if ((GetAsyncKeyState(VK_LWIN)|GetAsyncKeyState(VK_RWIN))&~1) state |= FL_META;
      Fl::e_state = state;
      return 0;
    }
    break;

  case WM_KEYDOWN:
  case WM_SYSKEYDOWN:
  case WM_KEYUP:
  case WM_SYSKEYUP:
    // save the keysym until we figure out the characters:
    Fl::e_keysym = Fl::e_original_keysym = ms2fltk(wParam,lParam&(1<<24));
    // See if TranslateMessage turned it into a WM_*CHAR message:
    if (PeekMessage(&fl_msg, hWnd, WM_CHAR, WM_SYSDEADCHAR, PM_REMOVE)) {
      uMsg = fl_msg.message;
      wParam = fl_msg.wParam;
      lParam = fl_msg.lParam;
    }
  case WM_DEADCHAR:
  case WM_SYSDEADCHAR:
  case WM_CHAR:
  case WM_SYSCHAR: {
    ulong state = Fl::e_state & 0xff000000; // keep the mouse button state
    // if GetKeyState is expensive we might want to comment some of these out:
    if (GetKeyState(VK_SHIFT)&~1) state |= FL_SHIFT;
    if (GetKeyState(VK_CAPITAL)) state |= FL_CAPS_LOCK;
    if (GetKeyState(VK_CONTROL)&~1) state |= FL_CTRL;
    // Alt gets reported for the Alt-GR switch on foreign keyboards.
    // so we need to check the event as well to get it right:
    if ((lParam&(1<<29)) //same as GetKeyState(VK_MENU)
	&& uMsg != WM_CHAR) state |= FL_ALT;
    if (GetKeyState(VK_NUMLOCK)) state |= FL_NUM_LOCK;
    if ((GetKeyState(VK_LWIN)|GetKeyState(VK_RWIN))&~1) {
      // WIN32 bug?  GetKeyState returns garbage if the user hit the
      // meta key to pop up start menu.  Sigh.
      if ((GetAsyncKeyState(VK_LWIN)|GetAsyncKeyState(VK_RWIN))&~1)
	state |= FL_META;
    }
    if (GetKeyState(VK_SCROLL)) state |= FL_SCROLL_LOCK;
    Fl::e_state = state;
    static char buffer[2];
    if (uMsg == WM_CHAR || uMsg == WM_SYSCHAR) {
      buffer[0] = char(wParam);
      Fl::e_length = 1;
    } else if (Fl::e_keysym >= FL_KP && Fl::e_keysym <= FL_KP_Last) {
      if (state & FL_NUM_LOCK) {
        // Convert to regular keypress...
	buffer[0] = Fl::e_keysym-FL_KP;
	Fl::e_length = 1;
      } else {
        // Convert to special keypress...
	buffer[0] = 0;
	Fl::e_length = 0;
	switch (Fl::e_keysym) {
	  case FL_KP + '0' :
	    Fl::e_keysym = FL_Insert;
	    break;
	  case FL_KP + '1' :
	    Fl::e_keysym = FL_End;
	    break;
	  case FL_KP + '2' :
	    Fl::e_keysym = FL_Down;
	    break;
	  case FL_KP + '3' :
	    Fl::e_keysym = FL_Page_Down;
	    break;
	  case FL_KP + '4' :
	    Fl::e_keysym = FL_Left;
	    break;
	  case FL_KP + '6' :
	    Fl::e_keysym = FL_Right;
	    break;
	  case FL_KP + '7' :
	    Fl::e_keysym = FL_Home;
	    break;
	  case FL_KP + '8' :
	    Fl::e_keysym = FL_Up;
	    break;
	  case FL_KP + '9' :
	    Fl::e_keysym = FL_Page_Up;
	    break;
	  case FL_KP + '.' :
	    Fl::e_keysym = FL_Delete;
	    break;
	  case FL_KP + '/' :
	  case FL_KP + '*' :
	  case FL_KP + '-' :
	  case FL_KP + '+' :
	    buffer[0] = Fl::e_keysym-FL_KP;
	    Fl::e_length = 1;
	    break;
	}
      }
    } else if ((lParam & (1<<31))==0){
      buffer[0] = 0;
      Fl::e_length = 0;
    }
    Fl::e_text = buffer;
    if (lParam & (1<<31)) { // key up events.
      if (Fl::handle(FL_KEYUP, window)) return 0;
      break;
    }
    // for (int i = lParam&0xff; i--;)
    while (window->parent()) window = window->window();
    if (Fl::handle(FL_KEYBOARD,window)) return 0;
    break;}

  case WM_MOUSEWHEEL: {
    static int delta = 0; // running total of all motion
    delta += (SHORT)(HIWORD(wParam));
    Fl::e_dy = -delta / WHEEL_DELTA;
    delta += Fl::e_dy * WHEEL_DELTA;
    if (Fl::e_dy) Fl::handle(FL_MOUSEWHEEL, window);
    return 0;
  }

  case WM_GETMINMAXINFO:
    Fl_X::i(window)->set_minmax((LPMINMAXINFO)lParam);
    break;

  case WM_SIZE:
    if (!window->parent()) {
      if (wParam == SIZE_MINIMIZED || wParam == SIZE_MAXHIDE) {
	Fl::handle(FL_HIDE, window);
      } else {
	Fl::handle(FL_SHOW, window);
	resize_bug_fix = window;
	window->size(LOWORD(lParam), HIWORD(lParam));
      }
    }
    break;

  case WM_MOVE: {
    resize_bug_fix = window;
    int nx = LOWORD(lParam);
    int ny = HIWORD(lParam);
    if (nx & 0x8000) nx -= 65536;
    if (ny & 0x8000) ny -= 65536;
    window->position(nx, ny); }
    break;

  case WM_SETCURSOR:
    if (LOWORD(lParam) == HTCLIENT) {
      while (window->parent()) window = window->window();
      SetCursor(Fl_X::i(window)->cursor);
      return 0;
    }
    break;

#if USE_COLORMAP
  case WM_QUERYNEWPALETTE :
    fl_GetDC(hWnd);
    if (fl_select_palette()) InvalidateRect(hWnd, NULL, FALSE);
    break;

  case WM_PALETTECHANGED:
    fl_GetDC(hWnd);
    if ((HWND)wParam != hWnd && fl_select_palette()) UpdateColors(fl_gc);
    break;

  case WM_CREATE :
    fl_GetDC(hWnd);
    fl_select_palette();
    break;
#endif

  case WM_DESTROYCLIPBOARD:
    fl_i_own_selection[1] = 0;
    return 1;

  case WM_RENDERALLFORMATS:
    fl_i_own_selection[1] = 0;
    // Windoze seems unhappy unless I do these two steps. Documentation
    // seems to vary on whether opening the clipboard is necessary or
    // is in fact wrong:
    CloseClipboard();
    OpenClipboard(NULL);
    // fall through...
  case WM_RENDERFORMAT: {
    HANDLE h = GlobalAlloc(GHND, fl_selection_length[1]+1);
    if (h) {
      LPSTR p = (LPSTR)GlobalLock(h);
      memcpy(p, fl_selection_buffer[1], fl_selection_length[1]);
      p[fl_selection_length[1]] = 0;
      GlobalUnlock(h);
      SetClipboardData(CF_TEXT, h);
    }
    // Windoze also seems unhappy if I don't do this. Documentation very
    // unclear on what is correct:
    if (fl_msg.message == WM_RENDERALLFORMATS) CloseClipboard();
    return 1;}

  default:
    if (Fl::handle(0,0)) return 0;
    break;
  }

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

////////////////////////////////////////////////////////////////
// This function gets the dimensions of the top/left borders and
// the title bar, if there is one, based on the FL_BORDER, FL_MODAL
// and FL_NONMODAL flags, and on the window's size range.
// It returns the following values:
//
// value | border | title bar
//   0   |  none  |   no
//   1   |  fix   |   yes
//   2   |  size  |   yes

int Fl_X::fake_X_wm(const Fl_Window* w,int &X,int &Y, int &bt,int &bx, int &by) {
  int W, H, xoff, yoff, dx, dy;
  int ret = bx = by = bt = 0;

  int fallback = 1;
  if (!w->parent()) {
    HWND hwnd = fl_xid(w);
    if (hwnd) {
      // The block below calculates the window borders by requesting the
      // required decorated window rectangle for a desired client rectangle.
      // If any part of the function above fails, we will drop to a 
      // fallback to get the best guess which is always available.
      HWND hwnd = fl_xid(w);
      // request the style flags of this window, as WIN32 sees them
      LONG style = GetWindowLong(hwnd, GWL_STYLE);
      LONG exstyle = GetWindowLong(hwnd, GWL_EXSTYLE);
      RECT r;
      r.left = w->x();
      r.top = w->y();
      r.right = w->x()+w->w();
      r.bottom = w->y()+w->h();
      // get the decoration rectangle for the desired client rectangle
      BOOL ok = AdjustWindowRectEx(&r, style, FALSE, exstyle);
      if (ok) {
        X = r.left;
        Y = r.top;
        W = r.right - r.left;
        H = r.bottom - r.top;
        bx = w->x() - r.left;
        by = r.bottom - w->y() - w->h(); // height of the bootm frame
        bt = w->y() - r.top - by; // height of top caption bar
        xoff = bx;
        yoff = by + bt;
        dx = W - w->w();
        dy = H - w->h();
        if (w->size_range_set && (w->maxw != w->minw || w->maxh != w->minh))
          ret = 2;
        else
          ret = 1;
        fallback = 0;
      }
    }
  }
  // This is the original (pre 1.1.7) routine to calculate window border sizes.
  if (fallback) {
    if (w->border() && !w->parent()) {
      if (w->size_range_set && (w->maxw != w->minw || w->maxh != w->minh)) {
        ret = 2;
        bx = GetSystemMetrics(SM_CXSIZEFRAME);
        by = GetSystemMetrics(SM_CYSIZEFRAME);
      } else {
        ret = 1;
        bx = GetSystemMetrics(SM_CXFIXEDFRAME);
        by = GetSystemMetrics(SM_CYFIXEDFRAME);
      }
      bt = GetSystemMetrics(SM_CYCAPTION);
    }
    //The coordinates of the whole window, including non-client area
    xoff = bx;
    yoff = by + bt;
    dx = 2*bx;
    dy = 2*by + bt;
    X = w->x()-xoff;
    Y = w->y()-yoff;
    W = w->w()+dx;
    H = w->h()+dy;
  }

  //Proceed to positioning the window fully inside the screen, if possible
  //Make border's lower right corner visible
  int scr_x, scr_y, scr_w, scr_h;
  Fl::screen_xywh(scr_x, scr_y, scr_w, scr_h, X, Y);
  if (scr_x+scr_w < X+W) X = scr_x+scr_w - W;
  if (scr_y+scr_h < Y+H) Y = scr_y+scr_h - H;
  //Make border's upper left corner visible
  if (X<scr_x) X = scr_x;
  if (Y<scr_y) Y = scr_y;
  //Make client area's lower right corner visible
  if (scr_x+scr_w < X+dx+ w->w()) X = scr_x+scr_w - w->w() - dx;
  if (scr_y+scr_h < Y+dy+ w->h()) Y = scr_y+scr_h - w->h() - dy;
  //Make client area's upper left corner visible
  if (X+xoff < scr_x) X = scr_x-xoff;
  if (Y+yoff < scr_y) Y = scr_y-yoff;
  //Return the client area's top left corner in (X,Y)
  X+=xoff;
  Y+=yoff;

  return ret;
}

////////////////////////////////////////////////////////////////

void Fl_Window::resize(int X,int Y,int W,int H) {
  UINT flags = SWP_NOSENDCHANGING | SWP_NOZORDER 
             | SWP_NOACTIVATE | SWP_NOOWNERZORDER;
  int is_a_resize = (W != w() || H != h());
  int resize_from_program = (this != resize_bug_fix);
  if (!resize_from_program) resize_bug_fix = 0;
  if (X != x() || Y != y()) {
    set_flag(FL_FORCE_POSITION);
  } else {
    if (!is_a_resize) return;
    flags |= SWP_NOMOVE;
  }
  if (is_a_resize) {
    Fl_Group::resize(X,Y,W,H);
    if (visible_r()) {
      redraw(); 
      // only wait for exposure if this window has a size - a window 
      // with no width or height will never get an exposure event
      if (i && W>0 && H>0)
        i->wait_for_expose = 1;
    }
  } else {
    x(X); y(Y);
    flags |= SWP_NOSIZE;
  }
  if (!border()) flags |= SWP_NOACTIVATE;
  if (resize_from_program && shown()) {
    if (!resizable()) size_range(w(),h(),w(),h());
    int dummy_x, dummy_y, bt, bx, by;
    //Ignore window managing when resizing, so that windows (and more
    //specifically menus) can be moved offscreen.
    if (Fl_X::fake_X_wm(this, dummy_x, dummy_y, bt, bx, by)) {
      X -= bx;
      Y -= by+bt;
      W += 2*bx;
      H += 2*by+bt;
    }
    // avoid zero size windows. A zero sized window on Win32
    // will cause continouly  new redraw events.
    if (W<=0) W = 1;
    if (H<=0) H = 1;
    SetWindowPos(i->xid, 0, X, Y, W, H, flags);
  }
}

////////////////////////////////////////////////////////////////

/*
 * This silly little class remembers the name of all window classes 
 * we register to avoid double registration. It has the added bonus 
 * of freeing everything on application colse as well.
 */
class NameList {
public:
  NameList() { name = (char**)malloc(sizeof(char**)); NName = 1; nName = 0; }
  ~NameList() { 
    int i;
    for (i=0; i<nName; i++) free(name[i]);
    if (name) free(name); 
  }
  void add_name(const char *n) {
    if (NName==nName) {
      NName += 5;
      name = (char**)realloc(name, NName * sizeof(char*));
    }
    name[nName++] = strdup(n);
  }
  char has_name(const char *n) {
    int i;
    for (i=0; i<nName; i++) {
      if (strcmp(name[i], n)==0) return 1;
    }
    return 0;
  }
private:
  char **name;
  int nName, NName;
};

void fl_fix_focus(); // in Fl.cxx

char fl_show_iconic;	// hack for Fl_Window::iconic()
// int fl_background_pixel = -1; // color to use for background
HCURSOR fl_default_cursor;
UINT fl_wake_msg = 0;
int fl_disable_transient_for; // secret method of removing TRANSIENT_FOR

Fl_X* Fl_X::make(Fl_Window* w) {
  Fl_Group::current(0); // get rid of very common user bug: forgot end()

  // if the window is a subwindow and our parent is not mapped yet, we
  // mark this window visible, so that mapping the parent at a later
  // point in time will call this function again to finally map the subwindow.
  if (w->parent() && !Fl_X::i(w->window())) {
    w->set_visible();
    return 0L;
  }

  static NameList class_name_list;
  static const char *first_class_name = 0L;
  const char *class_name = w->xclass();
  if (!class_name) class_name = first_class_name; // reuse first class name used
  if (!class_name) class_name = "FLTK"; // default to create a "FLTK" WNDCLASS
  if (!first_class_name) {
    first_class_name = class_name;
  }

  if (!class_name_list.has_name(class_name)) {
    WNDCLASSEX wc;
    memset(&wc, 0, sizeof(wc));
    wc.cbSize = sizeof(WNDCLASSEX);
    // Documentation states a device context consumes about 800 bytes
    // of memory... so who cares? If 800 bytes per window is what it
    // takes to speed things up, I'm game.
    //wc.style = CS_HREDRAW | CS_VREDRAW | CS_CLASSDC | CS_DBLCLKS;
    wc.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC | CS_DBLCLKS;
    wc.lpfnWndProc = (WNDPROC)WndProc;
    wc.hInstance = fl_display;
    if (!w->icon())
      w->icon((void *)LoadIcon(NULL, IDI_APPLICATION));
    wc.hIcon = wc.hIconSm = (HICON)w->icon();
    wc.hCursor = fl_default_cursor = LoadCursor(NULL, IDC_ARROW);
    //uchar r,g,b; Fl::get_color(FL_GRAY,r,g,b);
    //wc.hbrBackground = (HBRUSH)CreateSolidBrush(RGB(r,g,b));
    wc.lpszClassName = class_name;
    RegisterClassEx(&wc);
    class_name_list.add_name(class_name);
  }

  const char* message_name = "FLTK::ThreadWakeup";
  if (!fl_wake_msg) fl_wake_msg = RegisterWindowMessage(message_name);

  HWND parent;
  DWORD style = WS_CLIPCHILDREN | WS_CLIPSIBLINGS;
  DWORD styleEx = WS_EX_LEFT;

  int xp = w->x();
  int yp = w->y();
  int wp = w->w();
  int hp = w->h();

  int showit = 1;

  if (w->parent()) {
    style |= WS_CHILD;
    styleEx |= WS_EX_WINDOWEDGE | WS_EX_CONTROLPARENT;
    parent = fl_xid(w->window());
  } else {
    if (!w->size_range_set) {
      if (w->resizable()) {
	Fl_Widget *o = w->resizable();
	int minw = o->w(); if (minw > 100) minw = 100;
	int minh = o->h(); if (minh > 100) minh = 100;
	w->size_range(w->w() - o->w() + minw, w->h() - o->h() + minh, 0, 0);
      } else {
	w->size_range(w->w(), w->h(), w->w(), w->h());
      }
    }
    styleEx |= WS_EX_WINDOWEDGE | WS_EX_CONTROLPARENT;
    int xwm = xp , ywm = yp , bt, bx, by;
    switch (fake_X_wm(w, xwm, ywm, bt, bx, by)) {
      // No border (used for menus)
      case 0: style |= WS_POPUP;
              styleEx |= WS_EX_TOOLWINDOW;
	      break;

      // Thin border and title bar
      case 1: style |= WS_DLGFRAME | WS_CAPTION; break;

      // Thick, resizable border and title bar, with maximize button
      case 2: style |= WS_THICKFRAME | WS_MAXIMIZEBOX | WS_CAPTION ; break;
    }
    if (by+bt) {
      if (!w->modal()) style |= WS_SYSMENU | WS_MINIMIZEBOX;
      wp += 2*bx;
      hp += 2*by+bt;
    }
    if (!(w->flags() & Fl_Window::FL_FORCE_POSITION)) {
      xp = yp = CW_USEDEFAULT;
    } else {
      if (!Fl::grab()) {
	xp = xwm; yp = ywm;
        w->x(xp);w->y(yp);
      }
      xp -= bx;
      yp -= by+bt;
    }

    parent = 0;
    if (w->non_modal() && Fl_X::first && !fl_disable_transient_for) {
      // find some other window to be "transient for":
      Fl_Window* w = Fl_X::first->w;
      while (w->parent()) w = w->window();
      parent = fl_xid(w);
      if (!w->visible()) showit = 0;
    } else if (Fl::grab()) parent = fl_xid(Fl::grab());
  }

  Fl_X* x = new Fl_X;
  x->other_xid = 0;
  x->setwindow(w);
  x->region = 0;
  x->private_dc = 0;
  x->cursor = fl_default_cursor;
  x->xid = CreateWindowEx(
    styleEx,
    class_name, w->label(), style,
    xp, yp, wp, hp,
    parent,
    NULL, // menu
    fl_display,
    NULL // creation parameters
    );
  x->next = Fl_X::first;
  Fl_X::first = x;

  x->wait_for_expose = 1;
  if (fl_show_iconic) {showit = 0; fl_show_iconic = 0;}
  if (showit) {
    w->set_visible();
    int old_event = Fl::e_number;
    w->handle(Fl::e_number = FL_SHOW); // get child windows to appear
    Fl::e_number = old_event;
    w->redraw(); // force draw to happen
  }
  // If we've captured the mouse, we dont want to activate any
  // other windows from the code, or we loose the capture.
  ShowWindow(x->xid, !showit ? SW_SHOWMINNOACTIVE :
	     (Fl::grab() || (style & WS_POPUP)) ? SW_SHOWNOACTIVATE : SW_SHOWNORMAL);

  // Drag-n-drop requires GCC 3.x or a non-GNU compiler...
#if !defined(__GNUC__) || __GNUC__ >= 3
  // Register all windows for potential drag'n'drop operations
  static char oleInitialized = 0;
  if (!oleInitialized) { OleInitialize(0L); oleInitialized=1; }

  RegisterDragDrop(x->xid, flIDropTarget);
#endif // !__GNUC__ || __GNUC__ >= 3

  if (w->modal()) {Fl::modal_ = w; fl_fix_focus();}
  return x;
}




/////////////////////////////////////////////////////////////////////////////
/// Win32 timers
///


static LRESULT CALLBACK s_TimerProc(HWND hwnd, UINT msg,
                                    WPARAM wParam, LPARAM lParam)
{
    switch (msg) {
    case WM_TIMER:
        {
            unsigned int id = wParam - 1;
            if (id < (unsigned int)win32_timer_used && win32_timers[id].handle) {
                Fl_Timeout_Handler cb   = win32_timers[id].callback;
                void*              data = win32_timers[id].data;
                delete_timer(win32_timers[id]);
                if (cb) {
                    (*cb)(data);
                }
            }
        }
        return 0;

    default:
        break;
    }

    return DefWindowProc(hwnd, msg, wParam, lParam);
}

void Fl::add_timeout(double time, Fl_Timeout_Handler cb, void* data)
{
    repeat_timeout(time, cb, data);
}

void Fl::repeat_timeout(double time, Fl_Timeout_Handler cb, void* data)
{
    int timer_id = -1;
    for (int i = 0;  i < win32_timer_used;  ++i) {
        if ( !win32_timers[i].handle ) {
            timer_id = i;
            break;
        }
    }
    if (timer_id == -1) {
        if (win32_timer_used == win32_timer_alloc) {
            realloc_timers();
        }
        timer_id = win32_timer_used++;
    }
    unsigned int elapsed = (unsigned int)(time * 1000);

    if ( !s_TimerWnd ) {
        const char* timer_class = "FLTimer";
        WNDCLASSEX wc;
        memset(&wc, 0, sizeof(wc));
        wc.cbSize = sizeof (wc);
        wc.style = CS_CLASSDC;
        wc.lpfnWndProc = (WNDPROC)s_TimerProc;
        wc.hInstance = fl_display;
        wc.lpszClassName = timer_class;
        /*ATOM atom =*/ RegisterClassEx(&wc);
        // create a zero size window to handle timer events
        s_TimerWnd = CreateWindowEx(WS_EX_LEFT | WS_EX_TOOLWINDOW,
                                    timer_class, "",
                                    WS_POPUP,
                                    0, 0, 0, 0,
                                    NULL, NULL, fl_display, NULL);
        // just in case this OS won't let us create a 0x0 size window:
        if (!s_TimerWnd) 
          s_TimerWnd = CreateWindowEx(WS_EX_LEFT | WS_EX_TOOLWINDOW,
                                    timer_class, "",
                                    WS_POPUP,
                                    0, 0, 1, 1,
                                    NULL, NULL, fl_display, NULL);
        ShowWindow(s_TimerWnd, SW_SHOWNOACTIVATE);
    }

    win32_timers[timer_id].callback = cb;
    win32_timers[timer_id].data     = data;

    win32_timers[timer_id].handle =
        SetTimer(s_TimerWnd, timer_id + 1, elapsed, NULL);
}

int Fl::has_timeout(Fl_Timeout_Handler cb, void* data)
{
    for (int i = 0;  i < win32_timer_used;  ++i) {
        Win32Timer& t = win32_timers[i];
        if (t.handle  &&  t.callback == cb  &&  t.data == data) {
            return 1;
        }
    }
    return 0;
}

void Fl::remove_timeout(Fl_Timeout_Handler cb, void* data)
{
    int i;
    for (i = 0;  i < win32_timer_used;  ++i) {
        Win32Timer& t = win32_timers[i];
        if (t.handle  &&  t.callback == cb  &&
            (t.data == data  ||  data == NULL)) {
            delete_timer(t);
        }
    }
}

/// END TIMERS
/////////////////////////////////////////////////////////////////////////////



////////////////////////////////////////////////////////////////

HINSTANCE fl_display = GetModuleHandle(NULL);

void Fl_Window::size_range_() {
  size_range_set = 1;
}

void Fl_X::set_minmax(LPMINMAXINFO minmax)
{
  int td, wd, hd, dummy_x, dummy_y;

  fake_X_wm(w, dummy_x, dummy_y, td, wd, hd);
  wd *= 2;
  hd *= 2;
  hd += td;

  minmax->ptMinTrackSize.x = w->minw + wd;
  minmax->ptMinTrackSize.y = w->minh + hd;
  if (w->maxw) {
    minmax->ptMaxTrackSize.x = w->maxw + wd;
    minmax->ptMaxSize.x = w->maxw + wd;
  }
  if (w->maxh) {
    minmax->ptMaxTrackSize.y = w->maxh + hd;
    minmax->ptMaxSize.y = w->maxh + hd;
  }
}

////////////////////////////////////////////////////////////////

#include <FL/filename.H> // need so FL_EXPORT fl_filename_name works

// returns pointer to the filename, or null if name ends with '/'
const char *fl_filename_name(const char *name) {
  const char *p,*q;
  if (!name) return (0);
  q = name;
  if (q[0] && q[1]==':') q += 2; // skip leading drive letter
  for (p = q; *p; p++) if (*p == '/' || *p == '\\') q = p+1;
  return q;
}

void Fl_Window::label(const char *name,const char *iname) {
  Fl_Widget::label(name);
  iconlabel_ = iname;
  if (shown() && !parent()) {
    if (!name) name = "";
    SetWindowText(i->xid, name);
    // if (!iname) iname = fl_filename_name(name);
    // should do something with iname here...
  }
}

////////////////////////////////////////////////////////////////
// Implement the virtual functions for the base Fl_Window class:

// If the box is a filled rectangle, we can make the redisplay *look*
// faster by using X's background pixel erasing.  We can make it
// actually *be* faster by drawing the frame only, this is done by
// setting fl_boxcheat, which is seen by code in fl_drawbox.cxx:
// For WIN32 it looks like all windows share a background color, so
// I use FL_GRAY for this and only do this cheat for windows that are
// that color.
// Actually it is totally disabled.
// Fl_Widget *fl_boxcheat;
//static inline int can_boxcheat(uchar b) {return (b==1 || (b&2) && b<=15);}

void Fl_Window::show() {
  image(Fl::scheme_bg_);
  if (Fl::scheme_bg_) {
    labeltype(FL_NORMAL_LABEL);
    align(FL_ALIGN_CENTER | FL_ALIGN_INSIDE | FL_ALIGN_CLIP);
  } else {
    labeltype(FL_NO_LABEL);
  }
  Fl_Tooltip::exit(this);
  if (!shown()) {
    // if (can_boxcheat(box())) fl_background_pixel = fl_xpixel(color());
    Fl_X::make(this);
  } else {
    // Once again, we would lose the capture if we activated the window.
    if (IsIconic(i->xid)) OpenIcon(i->xid);
    if (!fl_capture) BringWindowToTop(i->xid);
    //ShowWindow(i->xid,fl_capture?SW_SHOWNOACTIVATE:SW_RESTORE);
  }
}

Fl_Window *Fl_Window::current_;
// the current context
HDC fl_gc = 0;
// the current window handle, initially set to -1 so we can correctly
// allocate fl_GetDC(0)
HWND fl_window = NULL;

// Here we ensure only one GetDC is ever in place.
HDC fl_GetDC(HWND w) {
  if (fl_gc) {
    if (w == fl_window  &&  fl_window != NULL) return fl_gc;
    if (fl_window) fl_release_dc(fl_window, fl_gc); // ReleaseDC
  }
  fl_gc = GetDC(w);
  fl_save_dc(w, fl_gc);
  fl_window = w;
  // calling GetDC seems to always reset these: (?)
  SetTextAlign(fl_gc, TA_BASELINE|TA_LEFT);
  SetBkMode(fl_gc, TRANSPARENT);
  return fl_gc;
}

// make X drawing go into this window (called by subclass flush() impl.)
void Fl_Window::make_current() {
  fl_GetDC(fl_xid(this));

#if USE_COLORMAP
  // Windows maintains a hardware and software color palette; the
  // SelectPalette() call updates the current soft->hard mapping
  // for all drawing calls, so we must select it here before any
  // code does any drawing...

  fl_select_palette();
#endif // USE_COLORMAP

  current_ = this;
  fl_clip_region(0);
}

/* Make sure that all allocated fonts are released. This works only if 
   Fl::run() is allowed to exit by closing all windows. Calling 'exit(int)'
   will not automatically free any fonts. */
void fl_free_fonts(void)
{
// remove the Fl_FontSize chains
  int i;
  Fl_Fontdesc * s;
  Fl_FontSize * f;
  Fl_FontSize * ff;
  for (i=0; i<FL_FREE_FONT; i++) {
    s = fl_fonts + i;
    for (f=s->first; f; f=ff) {
      ff = f->next;
      delete f;
      s->first = ff;
    }
  }
}


///////////////////////////////////////////////////////////////////////
//
//  The following routines help fix a problem with the leaking of Windows
//  Device Context (DC) objects. The 'proper' protocol is for a program to
//  acquire a DC, save its state, do the modifications needed for drawing,
//  perform the drawing, restore the initial state, and release the DC. In
//  FLTK, the save and restore steps have previously been omitted and DCs are
//  not properly released, leading to a great number of DC leaks. As some
//  Windows "OSs" will hang when any process exceeds roughly 10,000 GDI objects,
//  it is important to control GDI leaks, which are much more important than memory
//  leaks. The following struct, global variable, and routines help implement
//  the above protocol for those cases where the GetDC and RestoreDC are not in
//  the same routine. For each GetDC, fl_save_dc is used to create an entry in 
//  a linked list that saves the window handle, the DC handle, and the initial
//  state. When the DC is to be released, 'fl_release_dc' is called. It restores
//  the initial state and releases the DC. When the program exits, 'fl_cleanup_dc_list'
//  frees any remaining nodes in the list.

struct Win_DC_List {      // linked list 
  HWND    window;         // window handle
  HDC     dc;             // device context handle
  int     saved_dc;       // initial state of DC
  Win_DC_List * next;     // pointer to next item
};

static Win_DC_List * win_DC_list = 0;

void fl_save_dc( HWND w, HDC dc) {
  Win_DC_List * t;
  t = new Win_DC_List;
  t->window = w;
  t->dc = dc;
  t->saved_dc = SaveDC(dc);
  if (win_DC_list)
    t->next = win_DC_list;
  else
    t->next = NULL;
  win_DC_list = t;
}

void fl_release_dc(HWND w, HDC dc) {
  Win_DC_List * t= win_DC_list;
  Win_DC_List * prev = 0;
  if (!t)
    return;
  do {
    if (t->dc == dc) {
      RestoreDC(dc, t->saved_dc);
      ReleaseDC(w, dc);
      if (!prev) {
        win_DC_list = t->next;   // delete first item
      } else {
        prev->next = t->next;       // one in the middle
      }
      delete (t);
      return;
    }
    prev = t;
    t = t->next;
  } while (t);
}

void fl_cleanup_dc_list(void) {          // clean up the list
  Win_DC_List * t = win_DC_list;
  if (!t)return;
  do {
    RestoreDC(t->dc, t->saved_dc);
    ReleaseDC(t->window, t->dc);
    win_DC_list = t->next;
    delete (t);
    t = win_DC_list;
  } while(t);
}


//
// End of "$Id: Fl_win32.cxx 6553 2008-12-07 11:05:41Z AlbrechtS $".
//
