/*
 * Combo controls
 * 
 * Copyright 1997 Alex Korobka
 * 
 * FIXME: roll up in Netscape 3.01.
 */

#include <string.h>

#include "winbase.h"
#include "winuser.h"
#include "wingdi.h"
#include "wine/winuser16.h"
#include "win.h"
#include "spy.h"
#include "user.h"
#include "heap.h"
#include "combo.h"
#include "drive.h"
#include "debugtools.h"
#include "tweak.h"

DEFAULT_DEBUG_CHANNEL(combo)

  /* bits in the dwKeyData */
#define KEYDATA_ALT             0x2000
#define KEYDATA_PREVSTATE       0x4000

/*
 * Additional combo box definitions
 */

#define CB_GETPTR( wnd )      (*(LPHEADCOMBO*)((wnd)->wExtra))
#define CB_NOTIFY( lphc, code ) \
	(SendMessageA( (lphc)->owner, WM_COMMAND, \
			 MAKEWPARAM((lphc)->self->wIDmenu, (code)), (lphc)->self->hwndSelf))
#define CB_GETEDITTEXTLENGTH( lphc ) \
	(SendMessageA( (lphc)->hWndEdit, WM_GETTEXTLENGTH, 0, 0 ))

/*
 * Drawing globals
 */
static HBITMAP 	hComboBmp = 0;
static UINT	CBitHeight, CBitWidth;

/*
 * Look and feel dependant "constants"
 */
#define COMBO_XBORDERSIZE()      ( (TWEAK_WineLook == WIN31_LOOK) ? 0 : 2 )
#define COMBO_YBORDERSIZE()      ( (TWEAK_WineLook == WIN31_LOOK) ? 0 : 2 )
#define COMBO_EDITBUTTONSPACE()  ( (TWEAK_WineLook == WIN31_LOOK) ? 8 : 0 )
#define EDIT_CONTROL_PADDING()   ( (TWEAK_WineLook == WIN31_LOOK) ? 0 : 1 )

/***********************************************************************
 *           COMBO_Init
 *
 * Load combo button bitmap.
 */
static BOOL COMBO_Init()
{
  HDC		hDC;
  
  if( hComboBmp ) return TRUE;
  if( (hDC = CreateCompatibleDC(0)) )
  {
    BOOL	bRet = FALSE;
    if( (hComboBmp = LoadBitmapA(0, MAKEINTRESOURCEA(OBM_COMBO))) )
    {
      BITMAP      bm;
      HBITMAP     hPrevB;
      RECT        r;

      GetObjectA( hComboBmp, sizeof(bm), &bm );
      CBitHeight = bm.bmHeight;
      CBitWidth  = bm.bmWidth;

      TRACE("combo bitmap [%i,%i]\n", CBitWidth, CBitHeight );

      hPrevB = SelectObject16( hDC, hComboBmp);
      SetRect( &r, 0, 0, CBitWidth, CBitHeight );
      InvertRect( hDC, &r );
      SelectObject( hDC, hPrevB );
      bRet = TRUE;
    }
    DeleteDC( hDC );
    return bRet;
  }
  return FALSE;
}

/***********************************************************************
 *           COMBO_NCCreate
 */
static LRESULT COMBO_NCCreate(WND* wnd, LPARAM lParam)
{
   LPHEADCOMBO 		lphc;

   if ( wnd && COMBO_Init() &&
      (lphc = HeapAlloc(GetProcessHeap(), 0, sizeof(HEADCOMBO))) )
   {
	LPCREATESTRUCTA     lpcs = (CREATESTRUCTA*)lParam;
       
	memset( lphc, 0, sizeof(HEADCOMBO) );
       *(LPHEADCOMBO*)wnd->wExtra = lphc;

       /* some braindead apps do try to use scrollbar/border flags */

	lphc->dwStyle = (lpcs->style & ~(WS_BORDER | WS_HSCROLL | WS_VSCROLL));
	wnd->dwStyle &= ~(WS_BORDER | WS_HSCROLL | WS_VSCROLL);

	/*
	 * We also have to remove the client edge style to make sure
	 * we don't end-up with a non client area.
	 */
	wnd->dwExStyle &= ~(WS_EX_CLIENTEDGE);

	if( !(lpcs->style & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE)) )
              lphc->dwStyle |= CBS_HASSTRINGS;
	if( !(wnd->dwExStyle & WS_EX_NOPARENTNOTIFY) )
	      lphc->wState |= CBF_NOTIFY;

	TRACE("[0x%08x], style = %08x\n", 
		     (UINT)lphc, lphc->dwStyle );

	return (LRESULT)(UINT)wnd->hwndSelf; 
    }
    return (LRESULT)FALSE;
}

/***********************************************************************
 *           COMBO_NCDestroy
 */
static LRESULT COMBO_NCDestroy( LPHEADCOMBO lphc )
{

   if( lphc )
   {
       WND*		wnd = lphc->self;

       TRACE("[%04x]: freeing storage\n", CB_HWND(lphc));

       if( (CB_GETTYPE(lphc) != CBS_SIMPLE) && lphc->hWndLBox ) 
   	   DestroyWindow( lphc->hWndLBox );

       HeapFree( GetProcessHeap(), 0, lphc );
       wnd->wExtra[0] = 0;
   }
   return 0;
}

/***********************************************************************
 *           CBForceDummyResize
 *
 * The dummy resize is used for listboxes that have a popup to trigger
 * a re-arranging of the contents of the combobox and the recalculation
 * of the size of the "real" control window.
 */
static void CBForceDummyResize(
  LPHEADCOMBO lphc)
{
  RECT windowRect;
	      
  GetWindowRect(CB_HWND(lphc), &windowRect);

  /*
   * We have to be careful, resizing a combobox also has the meaning that the
   * dropped rect will be resized. In this case, we want to trigger a resize
   * to recalculate layout but we don't want to change the dropped rectangle
   * So, we add the size of the dropped rectangle to the size of the control. 
   * this will cancel-out in the processing of the WM_WINDOWPOSCHANGING 
   * message.
   */  
  SetWindowPos( CB_HWND(lphc),
		(HWND)NULL,
		0, 0, 
		windowRect.right  - windowRect.left,
		windowRect.bottom - windowRect.top + 
		  lphc->droppedRect.bottom - lphc->droppedRect.top,
		SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE );
}

/***********************************************************************
 *           CBGetTextAreaHeight
 *
 * This method will calculate the height of the text area of the 
 * combobox.
 * The height of the text area is set in two ways. 
 * It can be set explicitely through a combobox message of through a
 * WM_MEASUREITEM callback.
 * If this is not the case, the height is set to 13 dialog units.
 * This height was determined through experimentation.
 */
static INT CBGetTextAreaHeight(
  HWND        hwnd,
  LPHEADCOMBO lphc)
{
  INT iTextItemHeight;

  if( lphc->editHeight ) /* explicitly set height */
  {
    iTextItemHeight = lphc->editHeight;
  }
  else
  {
    TEXTMETRICA tm;
    HDC         hDC       = GetDC(hwnd);
    HFONT       hPrevFont = 0;
    INT         baseUnitY;
    
    if (lphc->hFont)
      hPrevFont = SelectObject( hDC, lphc->hFont );
    
    GetTextMetricsA(hDC, &tm);
    
    baseUnitY = tm.tmHeight;
    
    if( hPrevFont )
      SelectObject( hDC, hPrevFont );
    
    ReleaseDC(hwnd, hDC);
    
    iTextItemHeight = ((13 * baseUnitY) / 8);

    /*
     * This "formula" calculates the height of the complete control.
     * To calculate the height of the text area, we have to remove the
     * borders.
     */
    iTextItemHeight -= 2*COMBO_YBORDERSIZE();
  }
  
  /*
   * Check the ownerdraw case if we haven't asked the parent the size
   * of the item yet.
   */
  if ( CB_OWNERDRAWN(lphc) &&
       (lphc->wState & CBF_MEASUREITEM) )
  {
    MEASUREITEMSTRUCT measureItem;
    RECT              clientRect;
    INT               originalItemHeight = iTextItemHeight;
    
    /*
     * We use the client rect for the width of the item.
     */
    GetClientRect(hwnd, &clientRect);
    
    lphc->wState &= ~CBF_MEASUREITEM;
    
    /*
     * Send a first one to measure the size of the text area
     */
    measureItem.CtlType    = ODT_COMBOBOX;
    measureItem.CtlID      = lphc->self->wIDmenu;
    measureItem.itemID     = -1;
    measureItem.itemWidth  = clientRect.right;
    measureItem.itemHeight = iTextItemHeight - 6; /* ownerdrawn cb is taller */
    measureItem.itemData   = 0;
    SendMessageA(lphc->owner, WM_MEASUREITEM, 
		 (WPARAM)measureItem.CtlID, (LPARAM)&measureItem);
    iTextItemHeight = 6 + measureItem.itemHeight;

    /*
     * Send a second one in the case of a fixed ownerdraw list to calculate the
     * size of the list items. (we basically do this on behalf of the listbox)
     */
    if (lphc->dwStyle & CBS_OWNERDRAWFIXED)
    {
      measureItem.CtlType    = ODT_COMBOBOX;
      measureItem.CtlID      = lphc->self->wIDmenu;
      measureItem.itemID     = 0;
      measureItem.itemWidth  = clientRect.right;
      measureItem.itemHeight = originalItemHeight;
      measureItem.itemData   = 0;
      SendMessageA(lphc->owner, WM_MEASUREITEM, 
		   (WPARAM)measureItem.CtlID, (LPARAM)&measureItem);
      lphc->fixedOwnerDrawHeight = measureItem.itemHeight;
    }
    
    /*
     * Keep the size for the next time 
     */
    lphc->editHeight = iTextItemHeight;
  }

  return iTextItemHeight;
}


/***********************************************************************
 *           CBCalcPlacement
 *
 * Set up component coordinates given valid lphc->RectCombo.
 */
static void CBCalcPlacement(
  HWND        hwnd,
  LPHEADCOMBO lphc,
  LPRECT      lprEdit, 
  LPRECT      lprButton, 
  LPRECT      lprLB)
{
  /*
   * Again, start with the client rectangle.
   */
  GetClientRect(hwnd, lprEdit);

  /*
   * Remove the borders
   */
  InflateRect(lprEdit, -COMBO_XBORDERSIZE(), -COMBO_YBORDERSIZE());

  /*
   * Chop off the bottom part to fit with the height of the text area.
   */
  lprEdit->bottom = lprEdit->top + CBGetTextAreaHeight(hwnd, lphc);

  /*
   * The button starts the same vertical position as the text area.
   */
  CopyRect(lprButton, lprEdit);

  /*
   * If the combobox is "simple" there is no button.
   */
  if( CB_GETTYPE(lphc) == CBS_SIMPLE ) 
    lprButton->left = lprButton->right = lprButton->bottom = 0;
  else
  {
    /*
     * Let's assume the combobox button is the same width as the
     * scrollbar button.
     * size the button horizontally and cut-off the text area.
     */
    lprButton->left = lprButton->right - GetSystemMetrics(SM_CXVSCROLL);
    lprEdit->right  = lprButton->left;
  }
  
  /*
   * In the case of a dropdown, there is an additional spacing between the
   * text area and the button.
   */
  if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
  {
    lprEdit->right -= COMBO_EDITBUTTONSPACE();
  }

  /*
   * If we have an edit control, we space it away from the borders slightly.
   */
  if (CB_GETTYPE(lphc) != CBS_DROPDOWNLIST)
  {
    InflateRect(lprEdit, -EDIT_CONTROL_PADDING(), -EDIT_CONTROL_PADDING());
  }
  
  /*
   * Adjust the size of the listbox popup.
   */
  if( CB_GETTYPE(lphc) == CBS_SIMPLE )
  {
    /*
     * Use the client rectangle to initialize the listbox rectangle
     */
    GetClientRect(hwnd, lprLB);

    /*
     * Then, chop-off the top part.
     */
    lprLB->top = lprEdit->bottom + COMBO_YBORDERSIZE();
  }
  else
  {
    /*
     * Make sure the dropped width is as large as the combobox itself.
     */
    if (lphc->droppedWidth < (lprButton->right + COMBO_XBORDERSIZE()))
    {
      lprLB->right  = lprLB->left + (lprButton->right + COMBO_XBORDERSIZE());

      /*
       * In the case of a dropdown, the popup listbox is offset to the right.
       * so, we want to make sure it's flush with the right side of the 
       * combobox
       */
      if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
	lprLB->right -= COMBO_EDITBUTTONSPACE();
    }
    else
       lprLB->right = lprLB->left + lphc->droppedWidth;
  }

  TRACE("\ttext\t= (%i,%i-%i,%i)\n",
	lprEdit->left, lprEdit->top, lprEdit->right, lprEdit->bottom);
  
  TRACE("\tbutton\t= (%i,%i-%i,%i)\n",
	lprButton->left, lprButton->top, lprButton->right, lprButton->bottom);
  
  TRACE("\tlbox\t= (%i,%i-%i,%i)\n", 
	lprLB->left, lprLB->top, lprLB->right, lprLB->bottom );
}

/***********************************************************************
 *           CBGetDroppedControlRect
 */
static void CBGetDroppedControlRect( LPHEADCOMBO lphc, LPRECT lpRect)
{
    /* In windows, CB_GETDROPPEDCONTROLRECT returns the upper left corner
     of the combo box and the lower right corner of the listbox */
    
    GetWindowRect(lphc->self->hwndSelf, lpRect);

    lpRect->right =  lpRect->left + lphc->droppedRect.right - lphc->droppedRect.left;
    lpRect->bottom = lpRect->top + lphc->droppedRect.bottom - lphc->droppedRect.top;

}

/***********************************************************************
 *           COMBO_WindowPosChanging         
 */
static LRESULT COMBO_WindowPosChanging(
  HWND        hwnd,
  LPHEADCOMBO lphc,
  WINDOWPOS*  posChanging)
{
  /*
   * We need to override the WM_WINDOWPOSCHANGING method to handle all
   * the non-simple comboboxes. The problem is that those controls are
   * always the same height. We have to make sure they are not resized
   * to another value.
   */
  if ( ( CB_GETTYPE(lphc) != CBS_SIMPLE ) && 
       ((posChanging->flags & SWP_NOSIZE) == 0) )
  {
    int newComboHeight;

    newComboHeight = CBGetTextAreaHeight(hwnd,lphc) +
                      2*COMBO_YBORDERSIZE();

    /*
     * Resizing a combobox has another side effect, it resizes the dropped
     * rectangle as well. However, it does it only if the new height for the
     * combobox is different than the height it should have. In other words,
     * if the application resizing the combobox only had the intention to resize
     * the actual control, for example, to do the layout of a dialog that is
     * resized, the height of the dropdown is not changed.
     */
    if (posChanging->cy != newComboHeight)
    {
      lphc->droppedRect.bottom = lphc->droppedRect.top + posChanging->cy - newComboHeight;

      posChanging->cy = newComboHeight;
    }
  }

  return 0;
}

/***********************************************************************
 *           COMBO_Create
 */
static LRESULT COMBO_Create( LPHEADCOMBO lphc, WND* wnd, LPARAM lParam)
{
  static char clbName[] = "ComboLBox";
  static char editName[] = "Edit";

  LPCREATESTRUCTA  lpcs = (CREATESTRUCTA*)lParam;
  
  if( !CB_GETTYPE(lphc) ) lphc->dwStyle |= CBS_SIMPLE;
  else if( CB_GETTYPE(lphc) != CBS_DROPDOWNLIST ) lphc->wState |= CBF_EDIT;

  lphc->self  = wnd;
  lphc->owner = lpcs->hwndParent;

  /*
   * The item height and dropped width are not set when the control
   * is created.
   */
  lphc->droppedWidth = lphc->editHeight = 0;

  /*
   * The first time we go through, we want to measure the ownerdraw item
   */
  lphc->wState |= CBF_MEASUREITEM;

  /* M$ IE 3.01 actually creates (and rapidly destroys) an ownerless combobox */

  if( lphc->owner || !(lpcs->style & WS_VISIBLE) )
  {
      UINT	lbeStyle;

      /*
       * Initialize the dropped rect to the size of the client area of the
       * control and then, force all the areas of the combobox to be
       * recalculated.
       */
      GetClientRect( wnd->hwndSelf, &lphc->droppedRect );

      CBCalcPlacement(wnd->hwndSelf, 
		      lphc, 
		      &lphc->textRect, 
		      &lphc->buttonRect, 
		      &lphc->droppedRect );

      /*
       * Adjust the position of the popup listbox if it's necessary
       */
      if ( CB_GETTYPE(lphc) != CBS_SIMPLE )
      {
	lphc->droppedRect.top   = lphc->textRect.bottom + COMBO_YBORDERSIZE();

	/*
	 * If it's a dropdown, the listbox is offset
	 */
	if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
	  lphc->droppedRect.left += COMBO_EDITBUTTONSPACE();

	ClientToScreen(wnd->hwndSelf, (LPPOINT)&lphc->droppedRect);
	ClientToScreen(wnd->hwndSelf, (LPPOINT)&lphc->droppedRect.right);
      }

      /* create listbox popup */

      lbeStyle = (LBS_NOTIFY | WS_BORDER | WS_CLIPSIBLINGS) | 
                 (lpcs->style & (WS_VSCROLL | CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE));

      if( lphc->dwStyle & CBS_SORT )
	lbeStyle |= LBS_SORT;
      if( lphc->dwStyle & CBS_HASSTRINGS )
	lbeStyle |= LBS_HASSTRINGS;
      if( lphc->dwStyle & CBS_NOINTEGRALHEIGHT )
	lbeStyle |= LBS_NOINTEGRALHEIGHT;
      if( lphc->dwStyle & CBS_DISABLENOSCROLL )
	lbeStyle |= LBS_DISABLENOSCROLL;
  
      if( CB_GETTYPE(lphc) == CBS_SIMPLE ) 	/* child listbox */
	lbeStyle |= WS_CHILD | WS_VISIBLE;
      else					/* popup listbox */
	lbeStyle |= WS_POPUP;

     /* Dropdown ComboLBox is not a child window and we cannot pass 
      * ID_CB_LISTBOX directly because it will be treated as a menu handle.
      */
      lphc->hWndLBox = CreateWindowExA(0,
				       clbName,
				       NULL, 
				       lbeStyle, 
				       lphc->droppedRect.left, 
				       lphc->droppedRect.top, 
				       lphc->droppedRect.right - lphc->droppedRect.left, 
				       lphc->droppedRect.bottom - lphc->droppedRect.top, 
				       lphc->self->hwndSelf, 
		       (lphc->dwStyle & CBS_DROPDOWN)? (HMENU)0 : (HMENU)ID_CB_LISTBOX,
				       lphc->self->hInstance,
				       (LPVOID)lphc );

      /*
       * The ComboLBox is a strange little beast (when it's not a CBS_SIMPLE)...
       * It's a popup window but, when you get the window style, you get WS_CHILD.
       * When created, it's parent is the combobox but, when you ask for it's parent
       * after that, you're supposed to get the desktop. (see MFC code function
       * AfxCancelModes)
       * To achieve this in Wine, we have to create it as a popup and change 
       * it's style to child after the creation. 
       */
      if ( (lphc->hWndLBox!= 0) &&
	   (CB_GETTYPE(lphc) != CBS_SIMPLE) )
      {
	SetWindowLongA(lphc->hWndLBox, 
		       GWL_STYLE, 
		       (GetWindowLongA(lphc->hWndLBox, GWL_STYLE) | WS_CHILD) & ~WS_POPUP);
      }

      if( lphc->hWndLBox )
      {
	  BOOL	bEdit = TRUE;
	  lbeStyle = WS_CHILD | WS_VISIBLE | ES_NOHIDESEL | ES_LEFT;

	  /*
	   * In Win95 look, the border fo the edit control is 
	   * provided by the combobox
	   */
	  if (TWEAK_WineLook == WIN31_LOOK)
	    lbeStyle |= WS_BORDER;
	    
	  if( lphc->wState & CBF_EDIT ) 
	  {
	      if( lphc->dwStyle & CBS_OEMCONVERT )
		  lbeStyle |= ES_OEMCONVERT;
	      if( lphc->dwStyle & CBS_AUTOHSCROLL )
		  lbeStyle |= ES_AUTOHSCROLL;
	      if( lphc->dwStyle & CBS_LOWERCASE )
		  lbeStyle |= ES_LOWERCASE;
	      else if( lphc->dwStyle & CBS_UPPERCASE )
		  lbeStyle |= ES_UPPERCASE;

	      lphc->hWndEdit = CreateWindowExA(0,
					       editName, 
					       NULL, 
					       lbeStyle,
					       lphc->textRect.left, lphc->textRect.top, 
					       lphc->textRect.right - lphc->textRect.left,
					       lphc->textRect.bottom - lphc->textRect.top, 
					       lphc->self->hwndSelf, 
					       (HMENU)ID_CB_EDIT, 
					       lphc->self->hInstance, 
					       NULL );

	      if( !lphc->hWndEdit )
		bEdit = FALSE;
	  } 

          if( bEdit )
	  {
	    /* 
	     * If the combo is a dropdown, we must resize the control to fit only
	     * the text area and button. To do this, we send a dummy resize and the
	     * WM_WINDOWPOSCHANGING message will take care of setting the height for
	     * us.
	     */
	    if( CB_GETTYPE(lphc) != CBS_SIMPLE )
	    {
	      CBForceDummyResize(lphc);
	    }
	    
	    TRACE("init done\n");
	    return wnd->hwndSelf;
	  }
	  ERR("edit control failure.\n");
      } else ERR("listbox failure.\n");
  } else ERR("no owner for visible combo.\n");

  /* CreateWindow() will send WM_NCDESTROY to cleanup */

  return -1;
}

/***********************************************************************
 *           CBPaintButton
 *
 * Paint combo button (normal, pressed, and disabled states).
 */
static void CBPaintButton(
  LPHEADCOMBO lphc, 
  HDC         hdc,
  RECT        rectButton)
{
    UINT 	x, y;
    BOOL 	bBool;
    HDC       hMemDC;
    HBRUSH    hPrevBrush;
    COLORREF    oldTextColor, oldBkColor;

    if( lphc->wState & CBF_NOREDRAW ) 
      return;

    hPrevBrush = SelectObject(hdc, GetSysColorBrush(COLOR_BTNFACE));

    /*
     * Draw the button background
     */
    PatBlt( hdc,
	    rectButton.left,
	    rectButton.top,
	    rectButton.right-rectButton.left,
	    rectButton.bottom-rectButton.top,
	    PATCOPY );

    if( (bBool = lphc->wState & CBF_BUTTONDOWN) )
    {
	DrawEdge( hdc, &rectButton, EDGE_SUNKEN, BF_RECT );
    } 
    else 
    {
	DrawEdge( hdc, &rectButton, EDGE_RAISED, BF_RECT );
    }

    /*
     * Remove the edge of the button from the rectangle
     * and calculate the position of the bitmap.
     */
    InflateRect( &rectButton, -2, -2);	

    x = (rectButton.left + rectButton.right - CBitWidth) >> 1;
    y = (rectButton.top + rectButton.bottom - CBitHeight) >> 1;


    hMemDC = CreateCompatibleDC( hdc );
    SelectObject( hMemDC, hComboBmp );
    oldTextColor = SetTextColor( hdc, GetSysColor(COLOR_BTNFACE) );
    oldBkColor = SetBkColor( hdc, CB_DISABLED(lphc) ? RGB(128,128,128) :
			       RGB(0,0,0) );
    BitBlt( hdc, x, y, CBitWidth, CBitHeight, hMemDC, 0, 0, SRCCOPY );
    SetBkColor( hdc, oldBkColor );
    SetTextColor( hdc, oldTextColor );
    DeleteDC( hMemDC );
    SelectObject( hdc, hPrevBrush );
}

/***********************************************************************
 *           CBPaintText
 *
 * Paint CBS_DROPDOWNLIST text field / update edit control contents.
 */
static void CBPaintText(
  LPHEADCOMBO lphc, 
  HDC         hdc,
  RECT        rectEdit)
{
   INT	id, size = 0;
   LPSTR	pText = NULL;

   if( lphc->wState & CBF_NOREDRAW ) return;

   /* follow Windows combobox that sends a bunch of text 
    * inquiries to its listbox while processing WM_PAINT. */

   if( (id = SendMessageA(lphc->hWndLBox, LB_GETCURSEL, 0, 0) ) != LB_ERR )
   {
        size = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, id, 0);
        if( (pText = HeapAlloc( GetProcessHeap(), 0, size + 1)) )
	{
	    SendMessageA( lphc->hWndLBox, LB_GETTEXT, (WPARAM)id, (LPARAM)pText );
	    pText[size] = '\0';	/* just in case */
	} else return;
   }

   if( lphc->wState & CBF_EDIT )
   {
	if( CB_HASSTRINGS(lphc) ) SetWindowTextA( lphc->hWndEdit, pText ? pText : "" );
	if( lphc->wState & CBF_FOCUSED ) 
	    SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1));
   }
   else /* paint text field ourselves */
   {
        HBRUSH hPrevBrush = 0;
	HDC	 hDC = hdc;

	if( !hDC ) 
	{
	    if ((hDC = GetDC(lphc->self->hwndSelf)))
            {
                HBRUSH hBrush = SendMessageA( lphc->owner,
                                                  WM_CTLCOLORLISTBOX, 
                                                  hDC, lphc->self->hwndSelf );
                hPrevBrush = SelectObject( hDC, 
                           (hBrush) ? hBrush : GetStockObject(WHITE_BRUSH) );
            }
	}
	if( hDC )
	{
	    UINT	itemState;
	    HFONT	hPrevFont = (lphc->hFont) ? SelectObject(hDC, lphc->hFont) : 0;

	    /*
	     * Give ourselves some space.
	     */
	    InflateRect( &rectEdit, -1, -1 );

	    if ( (lphc->wState & CBF_FOCUSED) && 
	        !(lphc->wState & CBF_DROPPED) )
	    {
		/* highlight */

		FillRect( hDC, &rectEdit, GetSysColorBrush(COLOR_HIGHLIGHT) );
                SetBkColor( hDC, GetSysColor( COLOR_HIGHLIGHT ) );
                SetTextColor( hDC, GetSysColor( COLOR_HIGHLIGHTTEXT ) );
		itemState = ODS_SELECTED | ODS_FOCUS;
	    } 
	    else 
	      itemState = 0;

	    if( CB_OWNERDRAWN(lphc) )
	    {
		DRAWITEMSTRUCT dis;
		HRGN           clipRegion;

		/*
		 * Save the current clip region.
		 * To retrieve the clip region, we need to create one "dummy"
		 * clip region.
		 */
		clipRegion = CreateRectRgnIndirect(&rectEdit);

		if (GetClipRgn(hDC, clipRegion)!=1)
		{
		  DeleteObject(clipRegion);
		  clipRegion=(HRGN)NULL;
		}

		if ( lphc->self->dwStyle & WS_DISABLED )
		  itemState |= ODS_DISABLED;

		dis.CtlType	= ODT_COMBOBOX;
		dis.CtlID	= lphc->self->wIDmenu;
		dis.hwndItem	= lphc->self->hwndSelf;
		dis.itemAction	= ODA_DRAWENTIRE;
		dis.itemID	= id;
		dis.itemState	= itemState;
		dis.hDC		= hDC;
		dis.rcItem	= rectEdit;
		dis.itemData	= SendMessageA( lphc->hWndLBox, LB_GETITEMDATA, 
						  		  (WPARAM)id, 0 );

		/*
		 * Clip the DC and have the parent draw the item.
		 */
		IntersectClipRect(hDC,
				  rectEdit.left,  rectEdit.top,
				  rectEdit.right, rectEdit.bottom);

		SendMessageA(lphc->owner, WM_DRAWITEM, 
			     lphc->self->wIDmenu, (LPARAM)&dis );

		/*
		 * Reset the clipping region.
		 */
		SelectClipRgn(hDC, clipRegion);		
	    }
	    else
	    {
	        ExtTextOutA( hDC, 
			     rectEdit.left + 1, 
			     rectEdit.top + 1,
			     ETO_OPAQUE | ETO_CLIPPED, 
			     &rectEdit,
                               pText ? pText : "" , size, NULL );

		if(lphc->wState & CBF_FOCUSED && !(lphc->wState & CBF_DROPPED))
		    DrawFocusRect( hDC, &rectEdit );
	    }

	    if( hPrevFont ) 
	      SelectObject(hDC, hPrevFont );

	    if( !hdc ) 
	    {
		if( hPrevBrush ) 
		  SelectObject( hDC, hPrevBrush );

		ReleaseDC( lphc->self->hwndSelf, hDC );
	    }
	}
   }
   if (pText)
	HeapFree( GetProcessHeap(), 0, pText );
}

/***********************************************************************
 *           CBPaintBorder
 */
static void CBPaintBorder(
  HWND        hwnd,
  LPHEADCOMBO lphc,   
  HDC         hdc)
{
  RECT clientRect;

  if (CB_GETTYPE(lphc) != CBS_SIMPLE)
  {
    GetClientRect(hwnd, &clientRect);
  }
  else
  {
    CopyRect(&clientRect, &lphc->textRect);

    InflateRect(&clientRect, EDIT_CONTROL_PADDING(), EDIT_CONTROL_PADDING());
    InflateRect(&clientRect, COMBO_XBORDERSIZE(), COMBO_YBORDERSIZE());
  }

  DrawEdge(hdc, &clientRect, EDGE_SUNKEN, BF_RECT);
}

/***********************************************************************
 *           COMBO_EraseBackground
 */
static LRESULT COMBO_EraseBackground(
  HWND        hwnd, 
  LPHEADCOMBO lphc,
  HDC         hParamDC)
{
  HBRUSH  hBkgBrush;
  RECT    clientRect;
  HDC 	  hDC;
  
  hDC = (hParamDC) ? hParamDC
		   : GetDC(hwnd);

  /*
   * Calculate the area that we want to erase.
   */
  if (CB_GETTYPE(lphc) != CBS_SIMPLE)
  {
    GetClientRect(hwnd, &clientRect);
  }
  else
  {
    CopyRect(&clientRect, &lphc->textRect);

    InflateRect(&clientRect, COMBO_XBORDERSIZE(), COMBO_YBORDERSIZE());
  }

  hBkgBrush = SendMessageA( lphc->owner, WM_CTLCOLORLISTBOX,
			    hDC, hwnd);

  if( !hBkgBrush ) 
    hBkgBrush = GetStockObject(WHITE_BRUSH);
  
  FillRect(hDC, &clientRect, hBkgBrush);

  if (!hParamDC)
    ReleaseDC(hwnd, hDC);

  return TRUE;
}

/***********************************************************************
 *           COMBO_Paint
 */
static LRESULT COMBO_Paint(LPHEADCOMBO lphc, HDC hParamDC)
{
  PAINTSTRUCT ps;
  HDC 	hDC;
  
  hDC = (hParamDC) ? hParamDC
		   : BeginPaint( lphc->self->hwndSelf, &ps);


  if( hDC && !(lphc->wState & CBF_NOREDRAW) )
  {
      HBRUSH	hPrevBrush, hBkgBrush;

      hBkgBrush = SendMessageA( lphc->owner, WM_CTLCOLORLISTBOX,
				  hDC, lphc->self->hwndSelf );

      if( !hBkgBrush ) 
	hBkgBrush = GetStockObject(WHITE_BRUSH);

      hPrevBrush = SelectObject( hDC, hBkgBrush );

      /*
       * In non 3.1 look, there is a sunken border on the combobox
       */
      if (TWEAK_WineLook != WIN31_LOOK)
      {
	CBPaintBorder(CB_HWND(lphc), lphc, hDC);
      }

      if( !IsRectEmpty(&lphc->buttonRect) )
      {
	CBPaintButton(lphc, hDC, lphc->buttonRect);
      }

      if( !(lphc->wState & CBF_EDIT) )
      {
	/*
	 * The text area has a border only in Win 3.1 look.
	 */
	if (TWEAK_WineLook == WIN31_LOOK)
	{
	  HPEN hPrevPen = SelectObject( hDC, GetSysColorPen(COLOR_WINDOWFRAME) );
	  
	  Rectangle( hDC, 
		     lphc->textRect.left, lphc->textRect.top,
		     lphc->textRect.right - 1, lphc->textRect.bottom - 1);

	  SelectObject( hDC, hPrevPen );
	}

	CBPaintText( lphc, hDC, lphc->textRect);
      }

      if( hPrevBrush )
	SelectObject( hDC, hPrevBrush );
  }

  if( !hParamDC ) 
    EndPaint(lphc->self->hwndSelf, &ps);

  return 0;
}

/***********************************************************************
 *           CBUpdateLBox
 *
 * Select listbox entry according to the contents of the edit control.
 */
static INT CBUpdateLBox( LPHEADCOMBO lphc )
{
   INT	length, idx, ret;
   LPSTR	pText = NULL;
   
   idx = ret = LB_ERR;
   length = CB_GETEDITTEXTLENGTH( lphc );
 
   if( length > 0 ) 
       pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1);

   TRACE("\t edit text length %i\n", length );

   if( pText )
   {
       if( length ) GetWindowTextA( lphc->hWndEdit, pText, length + 1);
       else pText[0] = '\0';
       idx = SendMessageA( lphc->hWndLBox, LB_FINDSTRING, 
			     (WPARAM)(-1), (LPARAM)pText );
       if( idx == LB_ERR ) idx = 0;	/* select first item */
       else ret = idx;
       HeapFree( GetProcessHeap(), 0, pText );
   }

   /* select entry */

   SendMessageA( lphc->hWndLBox, LB_SETCURSEL, (WPARAM)idx, 0 );
   
   if( idx >= 0 )
   {
       SendMessageA( lphc->hWndLBox, LB_SETTOPINDEX, (WPARAM)idx, 0 );
       /* probably superfluous but Windows sends this too */
       SendMessageA( lphc->hWndLBox, LB_SETCARETINDEX, (WPARAM)idx, 0 );
   }
   return ret;
}

/***********************************************************************
 *           CBUpdateEdit
 *
 * Copy a listbox entry to the edit control.
 */
static void CBUpdateEdit( LPHEADCOMBO lphc , INT index )
{
   INT	length;
   LPSTR	pText = NULL;

   TRACE("\t %i\n", index );

   if( index == -1 )
   {
       length = CB_GETEDITTEXTLENGTH( lphc );
       if( length )
       {
           if( (pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1)) )
           {
 	   	GetWindowTextA( lphc->hWndEdit, pText, length + 1 );
	   	index = SendMessageA( lphc->hWndLBox, LB_FINDSTRING,
				        (WPARAM)(-1), (LPARAM)pText );
	   	HeapFree( GetProcessHeap(), 0, pText );
           }
       }
   }

   if( index >= 0 ) /* got an entry */
   {
       length = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, (WPARAM)index, 0);
       if( length )
       {
	   if( (pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1)) )
	   {
		SendMessageA( lphc->hWndLBox, LB_GETTEXT, 
				(WPARAM)index, (LPARAM)pText );

		lphc->wState |= CBF_NOEDITNOTIFY;

		SendMessageA( lphc->hWndEdit, WM_SETTEXT, 0, (LPARAM)pText );
		SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1) );
		HeapFree( GetProcessHeap(), 0, pText );
	   }
       }
   }
}

/***********************************************************************
 *           CBDropDown
 * 
 * Show listbox popup.
 */
static void CBDropDown( LPHEADCOMBO lphc )
{
   RECT	rect;

   TRACE("[%04x]: drop down\n", CB_HWND(lphc));

   CB_NOTIFY( lphc, CBN_DROPDOWN );

   /* set selection */

   lphc->wState |= CBF_DROPPED;
   if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
   {
       lphc->droppedIndex = CBUpdateLBox( lphc );

       if( !(lphc->wState & CBF_CAPTURE) ) 
	 CBUpdateEdit( lphc, lphc->droppedIndex );
   }
   else
   {
       lphc->droppedIndex = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );

       if( lphc->droppedIndex == LB_ERR ) 
	 lphc->droppedIndex = 0;

       SendMessageA( lphc->hWndLBox, LB_SETTOPINDEX, (WPARAM)lphc->droppedIndex, 0 );
       SendMessageA( lphc->hWndLBox, LB_CARETON, 0, 0 );
   }

   /* now set popup position */
   GetWindowRect( lphc->self->hwndSelf, &rect );
   

   /*
    * If it's a dropdown, the listbox is offset
    */
   if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
     rect.left += COMBO_EDITBUTTONSPACE();

   SetWindowPos( lphc->hWndLBox, HWND_TOP, rect.left, rect.bottom, 
		 lphc->droppedRect.right - lphc->droppedRect.left,
		 lphc->droppedRect.bottom - lphc->droppedRect.top, 
		 SWP_NOACTIVATE | SWP_NOREDRAW);

   if( !(lphc->wState & CBF_NOREDRAW) )
     RedrawWindow( lphc->self->hwndSelf, NULL, 0, RDW_INVALIDATE | 
			   RDW_ERASE | RDW_UPDATENOW | RDW_NOCHILDREN );

   ShowWindow( lphc->hWndLBox, SW_SHOWNA );
}

/***********************************************************************
 *           CBRollUp
 *
 * Hide listbox popup.
 */
static void CBRollUp( LPHEADCOMBO lphc, BOOL ok, BOOL bButton )
{
   HWND	hWnd = lphc->self->hwndSelf;

   CB_NOTIFY( lphc, (ok) ? CBN_SELENDOK : CBN_SELENDCANCEL );

   if( IsWindow( hWnd ) && CB_GETTYPE(lphc) != CBS_SIMPLE )
   {

       TRACE("[%04x]: roll up [%i]\n", CB_HWND(lphc), (INT)ok );

       /* 
	* It seems useful to send the WM_LBUTTONUP with (-1,-1) when cancelling 
	* and with (0,0) (anywhere in the listbox) when Oking.
	*/
       SendMessageA( lphc->hWndLBox, WM_LBUTTONUP, 0, ok ? (LPARAM)0 : (LPARAM)(-1) );       

       if( lphc->wState & CBF_DROPPED ) 
       {
	   RECT	rect;

	   lphc->wState &= ~CBF_DROPPED;
	   ShowWindow( lphc->hWndLBox, SW_HIDE );

	   if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
	   {
	       INT index = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
	       CBUpdateEdit( lphc, index );
	       rect = lphc->buttonRect;
	   }
	   else 
           {
	       if( bButton )
	       {
		 UnionRect( &rect,
			    &lphc->buttonRect,
			    &lphc->textRect);
	       }
	       else
		 rect = lphc->textRect;

	       bButton = TRUE;
	   }

	   if( bButton && !(lphc->wState & CBF_NOREDRAW) )
	       RedrawWindow( hWnd, &rect, 0, RDW_INVALIDATE | 
			       RDW_ERASE | RDW_UPDATENOW | RDW_NOCHILDREN );
	   CB_NOTIFY( lphc, CBN_CLOSEUP );
       }
   }
}

/***********************************************************************
 *           COMBO_FlipListbox
 *
 * Used by the ComboLBox to show/hide itself in response to VK_F4, etc...
 */
BOOL COMBO_FlipListbox( LPHEADCOMBO lphc, BOOL bRedrawButton )
{
   if( lphc->wState & CBF_DROPPED )
   {
       CBRollUp( lphc, TRUE, bRedrawButton );
       return FALSE;
   }

   CBDropDown( lphc );
   return TRUE;
}

/***********************************************************************
 *           COMBO_GetLBWindow
 *
 * Edit control helper.
 */
HWND COMBO_GetLBWindow( WND* pWnd )
{
  LPHEADCOMBO       lphc = CB_GETPTR(pWnd);
  if( lphc ) return lphc->hWndLBox;
  return 0;
}


/***********************************************************************
 *           CBRepaintButton
 */
static void CBRepaintButton( LPHEADCOMBO lphc )
   {
  InvalidateRect(CB_HWND(lphc), &lphc->buttonRect, TRUE);
  UpdateWindow(CB_HWND(lphc));
}

/***********************************************************************
 *           COMBO_SetFocus
 */
static void COMBO_SetFocus( LPHEADCOMBO lphc )
{
   if( !(lphc->wState & CBF_FOCUSED) )
   {
       if( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST )
           SendMessageA( lphc->hWndLBox, LB_CARETON, 0, 0 );

       if( lphc->wState & CBF_EDIT )
           SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1) );
       lphc->wState |= CBF_FOCUSED;
       if( !(lphc->wState & CBF_EDIT) )
       {
	 InvalidateRect(CB_HWND(lphc), &lphc->textRect, TRUE);
       }

       CB_NOTIFY( lphc, CBN_SETFOCUS );
   }
}

/***********************************************************************
 *           COMBO_KillFocus
 */
static void COMBO_KillFocus( LPHEADCOMBO lphc )
{
   HWND	hWnd = lphc->self->hwndSelf;

   if( lphc->wState & CBF_FOCUSED )
   {
       SendMessageA( hWnd, WM_LBUTTONUP, 0, (LPARAM)(-1) );

       CBRollUp( lphc, FALSE, TRUE );
       if( IsWindow( hWnd ) )
       {
           if( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST )
               SendMessageA( lphc->hWndLBox, LB_CARETOFF, 0, 0 );

 	   lphc->wState &= ~CBF_FOCUSED;

           /* redraw text */
           if( lphc->wState & CBF_EDIT )
               SendMessageA( lphc->hWndEdit, EM_SETSEL, (WPARAM)(-1), 0 );
           else
	   {
	     InvalidateRect(CB_HWND(lphc), &lphc->textRect, TRUE);
	   }

           CB_NOTIFY( lphc, CBN_KILLFOCUS );
       }
   }
}

/***********************************************************************
 *           COMBO_Command
 */
static LRESULT COMBO_Command( LPHEADCOMBO lphc, WPARAM wParam, HWND hWnd )
{
   if ( lphc->wState & CBF_EDIT && lphc->hWndEdit == hWnd )
   {
       /* ">> 8" makes gcc generate jump-table instead of cmp ladder */

       switch( HIWORD(wParam) >> 8 )
       {   
	   case (EN_SETFOCUS >> 8):

		TRACE("[%04x]: edit [%04x] got focus\n", 
			     CB_HWND(lphc), lphc->hWndEdit );

		if( !(lphc->wState & CBF_FOCUSED) ) COMBO_SetFocus( lphc );
	        break;

	   case (EN_KILLFOCUS >> 8):

		TRACE("[%04x]: edit [%04x] lost focus\n",
			     CB_HWND(lphc), lphc->hWndEdit );

		/* NOTE: it seems that Windows' edit control sends an
		 * undocumented message WM_USER + 0x1B instead of this
		 * notification (only when it happens to be a part of 
		 * the combo). ?? - AK.
		 */

		COMBO_KillFocus( lphc );
		break;


	   case (EN_CHANGE >> 8):
	       /*
	        * In some circumstances (when the selection of the combobox
		* is changed for example) we don't wans the EN_CHANGE notification
		* to be forwarded to the parent of the combobox. This code
		* checks a flag that is set in these occasions and ignores the 
		* notification.
	        */
	        if (lphc->wState & CBF_NOEDITNOTIFY)
		{
		  lphc->wState &= ~CBF_NOEDITNOTIFY;
		}
		else
		{
		  CB_NOTIFY( lphc, CBN_EDITCHANGE );
		}

		CBUpdateLBox( lphc );
		break;

	   case (EN_UPDATE >> 8):
		CB_NOTIFY( lphc, CBN_EDITUPDATE );
		break;

	   case (EN_ERRSPACE >> 8):
		CB_NOTIFY( lphc, CBN_ERRSPACE );
       }
   }
   else if( lphc->hWndLBox == hWnd )
   {
       switch( HIWORD(wParam) )
       {
	   case LBN_ERRSPACE:
		CB_NOTIFY( lphc, CBN_ERRSPACE );
		break;

	   case LBN_DBLCLK:
		CB_NOTIFY( lphc, CBN_DBLCLK );
		break;

	   case LBN_SELCHANGE:
	   case LBN_SELCANCEL:

		TRACE("[%04x]: lbox selection change [%04x]\n", 
			     CB_HWND(lphc), lphc->wState );

		/* do not roll up if selection is being tracked 
		 * by arrowkeys in the dropdown listbox */

		if( (lphc->wState & CBF_DROPPED) && !(lphc->wState & CBF_NOROLLUP) )
		     CBRollUp( lphc, (HIWORD(wParam) == LBN_SELCHANGE), TRUE );
		else lphc->wState &= ~CBF_NOROLLUP;

		CB_NOTIFY( lphc, CBN_SELCHANGE );
		InvalidateRect(CB_HWND(lphc), &lphc->textRect, TRUE);
		/* fall through */

	   case LBN_SETFOCUS:
	   case LBN_KILLFOCUS:
		/* nothing to do here since ComboLBox always resets the focus to its
		 * combo/edit counterpart */
		 break;
       }
   }
   return 0;
}

/***********************************************************************
 *           COMBO_ItemOp
 *
 * Fixup an ownerdrawn item operation and pass it up to the combobox owner.
 */
static LRESULT COMBO_ItemOp( LPHEADCOMBO lphc, UINT msg, 
			       WPARAM wParam, LPARAM lParam ) 
{
   HWND	hWnd = lphc->self->hwndSelf;

   TRACE("[%04x]: ownerdraw op %04x\n", CB_HWND(lphc), msg );

#define lpIS    ((LPDELETEITEMSTRUCT)lParam)

   /* two first items are the same in all 4 structs */
   lpIS->CtlType = ODT_COMBOBOX;
   lpIS->CtlID   = lphc->self->wIDmenu;

   switch( msg )	/* patch window handle */
   {
	case WM_DELETEITEM: 
	     lpIS->hwndItem = hWnd; 
#undef  lpIS
	     break;
	case WM_DRAWITEM: 
#define lpIS    ((LPDRAWITEMSTRUCT)lParam)
	     lpIS->hwndItem = hWnd; 
#undef  lpIS
	     break;
	case WM_COMPAREITEM: 
#define lpIS    ((LPCOMPAREITEMSTRUCT)lParam)
	     lpIS->hwndItem = hWnd; 
#undef  lpIS
	     break;
   }

   return SendMessageA( lphc->owner, msg, lphc->self->wIDmenu, lParam );
}

/***********************************************************************
 *           COMBO_GetText
 */
static LRESULT COMBO_GetText( LPHEADCOMBO lphc, UINT N, LPSTR lpText)
{
   if( lphc->wState & CBF_EDIT )
       return SendMessageA( lphc->hWndEdit, WM_GETTEXT, 
			     (WPARAM)N, (LPARAM)lpText );     

   /* get it from the listbox */

   if( lphc->hWndLBox )
   {
       INT idx = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
       if( idx != LB_ERR )
       {
           LPSTR	lpBuffer;
           INT	length = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN,
					        (WPARAM)idx, 0 );

           /* 'length' is without the terminating character */
           if( length >= N )
	       lpBuffer = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1 );
           else 
	       lpBuffer = lpText;

           if( lpBuffer )
           {
	       INT    n = SendMessageA( lphc->hWndLBox, LB_GETTEXT, 
					   (WPARAM)idx, (LPARAM)lpBuffer );

	       /* truncate if buffer is too short */

	       if( length >= N )
	       {
	       	   if (N && lpText) {
	           if( n != LB_ERR ) memcpy( lpText, lpBuffer, (N>n) ? n+1 : N-1 );
	           lpText[N - 1] = '\0';
                   }
	           HeapFree( GetProcessHeap(), 0, lpBuffer );
	       }
	       return (LRESULT)n;
	   }
       }
   }
   return 0;
}


/***********************************************************************
 *           CBResetPos
 *
 * This function sets window positions according to the updated 
 * component placement struct.
 */
static void CBResetPos(
  LPHEADCOMBO lphc, 
  LPRECT      rectEdit,
  LPRECT      rectLB,
  BOOL        bRedraw)
{
   BOOL	bDrop = (CB_GETTYPE(lphc) != CBS_SIMPLE);

   /* NOTE: logs sometimes have WM_LBUTTONUP before a cascade of
    * sizing messages */

   if( lphc->wState & CBF_EDIT )
     SetWindowPos( lphc->hWndEdit, 0, 
		   rectEdit->left, rectEdit->top,
		   rectEdit->right - rectEdit->left,
		   rectEdit->bottom - rectEdit->top,
                       SWP_NOZORDER | SWP_NOACTIVATE | ((bDrop) ? SWP_NOREDRAW : 0) );

   SetWindowPos( lphc->hWndLBox, 0,
		 rectLB->left, rectLB->top,
                 rectLB->right - rectLB->left, 
		 rectLB->bottom - rectLB->top, 
		   SWP_NOACTIVATE | SWP_NOZORDER | ((bDrop) ? SWP_NOREDRAW : 0) );

   if( bDrop )
   {
       if( lphc->wState & CBF_DROPPED )
       {
           lphc->wState &= ~CBF_DROPPED;
           ShowWindow( lphc->hWndLBox, SW_HIDE );
       }

       if( bRedraw && !(lphc->wState & CBF_NOREDRAW) )
           RedrawWindow( lphc->self->hwndSelf, NULL, 0,
                           RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW );
   }
}


/***********************************************************************
 *           COMBO_Size
 */
static void COMBO_Size( LPHEADCOMBO lphc )
  {
  CBCalcPlacement(lphc->self->hwndSelf,
		  lphc, 
		  &lphc->textRect, 
		  &lphc->buttonRect, 
		  &lphc->droppedRect);

  CBResetPos( lphc, &lphc->textRect, &lphc->droppedRect, TRUE );
}


/***********************************************************************
 *           COMBO_Font
 */
static void COMBO_Font( LPHEADCOMBO lphc, HFONT hFont, BOOL bRedraw )
{
  /*
   * Set the font
   */
  lphc->hFont = hFont;

  /*
   * Propagate to owned windows.
   */
  if( lphc->wState & CBF_EDIT )
      SendMessageA( lphc->hWndEdit, WM_SETFONT, (WPARAM)hFont, bRedraw );
  SendMessageA( lphc->hWndLBox, WM_SETFONT, (WPARAM)hFont, bRedraw );

  /*
   * Redo the layout of the control.
   */
  if ( CB_GETTYPE(lphc) == CBS_SIMPLE)
  {
    CBCalcPlacement(lphc->self->hwndSelf,
		    lphc, 
		    &lphc->textRect, 
		    &lphc->buttonRect, 
		    &lphc->droppedRect);
    
    CBResetPos( lphc, &lphc->textRect, &lphc->droppedRect, TRUE );
  }
  else
  {
    CBForceDummyResize(lphc);
  }
}


/***********************************************************************
 *           COMBO_SetItemHeight
 */
static LRESULT COMBO_SetItemHeight( LPHEADCOMBO lphc, INT index, INT height )
{
   LRESULT	lRet = CB_ERR;

   if( index == -1 ) /* set text field height */
   {
       if( height < 32768 )
       {
           lphc->editHeight = height;

	 /*
	  * Redo the layout of the control.
	  */
	 if ( CB_GETTYPE(lphc) == CBS_SIMPLE)
	 {
	   CBCalcPlacement(lphc->self->hwndSelf,
			   lphc, 
			   &lphc->textRect, 
			   &lphc->buttonRect, 
			   &lphc->droppedRect);
	   
	   CBResetPos( lphc, &lphc->textRect, &lphc->droppedRect, TRUE );
	 }
	 else
	 {
	   CBForceDummyResize(lphc);
	 }
	 	 
	   lRet = height;
       }
   } 
   else if ( CB_OWNERDRAWN(lphc) )	/* set listbox item height */
	lRet = SendMessageA( lphc->hWndLBox, LB_SETITEMHEIGHT, 
			      (WPARAM)index, (LPARAM)height );
   return lRet;
}

/***********************************************************************
 *           COMBO_SelectString
 */
static LRESULT COMBO_SelectString( LPHEADCOMBO lphc, INT start, LPCSTR pText )
{
   INT index = SendMessageA( lphc->hWndLBox, LB_SELECTSTRING, 
				 (WPARAM)start, (LPARAM)pText );
   if( index >= 0 )
   {
     if( lphc->wState & CBF_EDIT )
       CBUpdateEdit( lphc, index );
     else
     {
       InvalidateRect(CB_HWND(lphc), &lphc->textRect, TRUE);
     }
   }
   return (LRESULT)index;
}

/***********************************************************************
 *           COMBO_LButtonDown
 */
static void COMBO_LButtonDown( LPHEADCOMBO lphc, LPARAM lParam )
{
   POINT     pt;
   BOOL      bButton;
   HWND      hWnd = lphc->self->hwndSelf;

   pt.x = LOWORD(lParam);
   pt.y = HIWORD(lParam);
   bButton = PtInRect(&lphc->buttonRect, pt);

   if( (CB_GETTYPE(lphc) == CBS_DROPDOWNLIST) ||
       (bButton && (CB_GETTYPE(lphc) == CBS_DROPDOWN)) )
   {
       lphc->wState |= CBF_BUTTONDOWN;
       if( lphc->wState & CBF_DROPPED )
       {
	   /* got a click to cancel selection */

           lphc->wState &= ~CBF_BUTTONDOWN;
           CBRollUp( lphc, TRUE, FALSE );
	   if( !IsWindow( hWnd ) ) return;

           if( lphc->wState & CBF_CAPTURE )
           {
               lphc->wState &= ~CBF_CAPTURE;
               ReleaseCapture();
           }
       }
       else
       {
	   /* drop down the listbox and start tracking */

           lphc->wState |= CBF_CAPTURE;
           CBDropDown( lphc );
           SetCapture( hWnd );
       }
       if( bButton ) CBRepaintButton( lphc );
   }
}

/***********************************************************************
 *           COMBO_LButtonUp
 *
 * Release capture and stop tracking if needed.
 */
static void COMBO_LButtonUp( LPHEADCOMBO lphc, LPARAM lParam )
{
   if( lphc->wState & CBF_CAPTURE )
   {
       lphc->wState &= ~CBF_CAPTURE;
       if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
       {
	   INT index = CBUpdateLBox( lphc );
	   CBUpdateEdit( lphc, index );
       }
       ReleaseCapture();
   }

   if( lphc->wState & CBF_BUTTONDOWN )
   {
       lphc->wState &= ~CBF_BUTTONDOWN;
       CBRepaintButton( lphc );
   }
}

/***********************************************************************
 *           COMBO_MouseMove
 *
 * Two things to do - track combo button and release capture when
 * pointer goes into the listbox.
 */
static void COMBO_MouseMove( LPHEADCOMBO lphc, WPARAM wParam, LPARAM lParam )
{
   POINT  pt;
   RECT   lbRect;
   
   pt.x = LOWORD(lParam);
   pt.y = HIWORD(lParam);
   
   if( lphc->wState & CBF_BUTTONDOWN )
   {
     BOOL bButton;

     bButton = PtInRect(&lphc->buttonRect, pt);

     if( !bButton )
     {
       lphc->wState &= ~CBF_BUTTONDOWN;
       CBRepaintButton( lphc );
     }
   }

   GetClientRect( lphc->hWndLBox, &lbRect );
   MapWindowPoints( lphc->self->hwndSelf, lphc->hWndLBox, &pt, 1 );
   if( PtInRect(&lbRect, pt) )
   {
       lphc->wState &= ~CBF_CAPTURE;
       ReleaseCapture();
       if( CB_GETTYPE(lphc) == CBS_DROPDOWN ) CBUpdateLBox( lphc );

       /* hand over pointer tracking */
       SendMessageA( lphc->hWndLBox, WM_LBUTTONDOWN, wParam, lParam );
   }
}


/***********************************************************************
 *           ComboWndProc_locked
 *
 * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/ctrl/src/combobox_15.htm
 */
static inline LRESULT WINAPI ComboWndProc_locked( WND* pWnd, UINT message,
                             WPARAM wParam, LPARAM lParam )
{
    if( pWnd ) {
      LPHEADCOMBO	lphc = CB_GETPTR(pWnd);
      HWND		hwnd = pWnd->hwndSelf;

      TRACE("[%04x]: msg %s wp %08x lp %08lx\n",
		   pWnd->hwndSelf, SPY_GetMsgName(message), wParam, lParam );

      if( lphc || message == WM_NCCREATE )
      switch(message) 
      {	

	/* System messages */

     	case WM_NCCREATE: 
                return COMBO_NCCreate(pWnd, lParam);
     	case WM_NCDESTROY: 
		COMBO_NCDestroy(lphc);
		break;/* -> DefWindowProc */

     	case WM_CREATE: 
                return COMBO_Create(lphc, pWnd, lParam);

        case WM_PRINTCLIENT:
	        if (lParam & PRF_ERASEBKGND)
		  COMBO_EraseBackground(hwnd, lphc, wParam);

		/* Fallthrough */
     	case WM_PAINT:
		/* wParam may contain a valid HDC! */
		return  COMBO_Paint(lphc, wParam);
	case WM_ERASEBKGND:
		return  COMBO_EraseBackground(hwnd, lphc, wParam);
     	case WM_GETDLGCODE: 
		return  (LRESULT)(DLGC_WANTARROWS | DLGC_WANTCHARS);
        case WM_WINDOWPOSCHANGING:
	        return  COMBO_WindowPosChanging(hwnd, lphc, (LPWINDOWPOS)lParam);
	case WM_SIZE:
	        if( lphc->hWndLBox && 
		  !(lphc->wState & CBF_NORESIZE) ) COMBO_Size( lphc );
		return  TRUE;
	case WM_SETFONT:
		COMBO_Font( lphc, (HFONT16)wParam, (BOOL)lParam );
		return  TRUE;
	case WM_GETFONT:
		return  (LRESULT)lphc->hFont;
	case WM_SETFOCUS:
		if( lphc->wState & CBF_EDIT )
		    SetFocus( lphc->hWndEdit );
		else
		    COMBO_SetFocus( lphc );
		return  TRUE;
	case WM_KILLFOCUS:
#define hwndFocus ((HWND16)wParam)
		if( !hwndFocus ||
		    (hwndFocus != lphc->hWndEdit && hwndFocus != lphc->hWndLBox ))
		    COMBO_KillFocus( lphc );
#undef hwndFocus
		return  TRUE;
	case WM_COMMAND:
		return  COMBO_Command( lphc, wParam, (HWND)lParam );
	case WM_GETTEXT:
		return  COMBO_GetText( lphc, (UINT)wParam, (LPSTR)lParam );
	case WM_SETTEXT:
	case WM_GETTEXTLENGTH:
	case WM_CLEAR:
	case WM_CUT:
        case WM_PASTE:
	case WM_COPY:
		if( lphc->wState & CBF_EDIT )
		{
		    lphc->wState |= CBF_NOEDITNOTIFY;

		    return SendMessageA( lphc->hWndEdit, message, wParam, lParam );
		}
		return  CB_ERR;
	case WM_DRAWITEM:
	case WM_DELETEITEM:
	case WM_COMPAREITEM:
	case WM_MEASUREITEM:
		return  COMBO_ItemOp( lphc, message, wParam, lParam );
	case WM_ENABLE:
		if( lphc->wState & CBF_EDIT )
		    EnableWindow( lphc->hWndEdit, (BOOL)wParam ); 
		EnableWindow( lphc->hWndLBox, (BOOL)wParam );
		return  TRUE;
	case WM_SETREDRAW:
		if( wParam )
		    lphc->wState &= ~CBF_NOREDRAW;
		else
		    lphc->wState |= CBF_NOREDRAW;

		if( lphc->wState & CBF_EDIT )
		    SendMessageA( lphc->hWndEdit, message, wParam, lParam );
		SendMessageA( lphc->hWndLBox, message, wParam, lParam );
		return  0;
	case WM_SYSKEYDOWN:
		if( KEYDATA_ALT & HIWORD(lParam) )
		    if( wParam == VK_UP || wParam == VK_DOWN )
			COMBO_FlipListbox( lphc, TRUE );
		break;/* -> DefWindowProc */

	case WM_CHAR:
	case WM_KEYDOWN:
		if( lphc->wState & CBF_EDIT )
		    return  SendMessageA( lphc->hWndEdit, message, wParam, lParam );
		else
		    return  SendMessageA( lphc->hWndLBox, message, wParam, lParam );
	case WM_LBUTTONDOWN: 
		if( !(lphc->wState & CBF_FOCUSED) ) SetFocus( lphc->self->hwndSelf );
		if( lphc->wState & CBF_FOCUSED ) COMBO_LButtonDown( lphc, lParam );
		return  TRUE;
	case WM_LBUTTONUP:
		COMBO_LButtonUp( lphc, lParam );
		return  TRUE;
	case WM_MOUSEMOVE: 
		if( lphc->wState & CBF_CAPTURE ) 
		    COMBO_MouseMove( lphc, wParam, lParam );
		return  TRUE;
	/* Combo messages */

	case CB_ADDSTRING16:
		if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_ADDSTRING:
		return  SendMessageA( lphc->hWndLBox, LB_ADDSTRING, 0, lParam);
	case CB_INSERTSTRING16:
		wParam = (INT)(INT16)wParam;
		if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_INSERTSTRING:
		return  SendMessageA( lphc->hWndLBox, LB_INSERTSTRING, wParam, lParam);
	case CB_DELETESTRING16:
	case CB_DELETESTRING:
		return  SendMessageA( lphc->hWndLBox, LB_DELETESTRING, wParam, 0);
	case CB_SELECTSTRING16:
		wParam = (INT)(INT16)wParam;
		if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_SELECTSTRING:
		return  COMBO_SelectString( lphc, (INT)wParam, (LPSTR)lParam );
	case CB_FINDSTRING16:
		wParam = (INT)(INT16)wParam;
		if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_FINDSTRING:
		return  SendMessageA( lphc->hWndLBox, LB_FINDSTRING, wParam, lParam);
	case CB_FINDSTRINGEXACT16:
		wParam = (INT)(INT16)wParam;
		if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_FINDSTRINGEXACT:
		return  SendMessageA( lphc->hWndLBox, LB_FINDSTRINGEXACT, 
						       wParam, lParam );
	case CB_SETITEMHEIGHT16:
		wParam = (INT)(INT16)wParam;	/* signed integer */
	case CB_SETITEMHEIGHT:
		return  COMBO_SetItemHeight( lphc, (INT)wParam, (INT)lParam);
	case CB_GETITEMHEIGHT16:
		wParam = (INT)(INT16)wParam;
	case CB_GETITEMHEIGHT:
		if( (INT)wParam >= 0 )	/* listbox item */
                    return  SendMessageA( lphc->hWndLBox, LB_GETITEMHEIGHT, wParam, 0);
                return  CBGetTextAreaHeight(hwnd, lphc);
	case CB_RESETCONTENT16: 
	case CB_RESETCONTENT:
		SendMessageA( lphc->hWndLBox, LB_RESETCONTENT, 0, 0 );
		InvalidateRect(CB_HWND(lphc), NULL, TRUE);
		return  TRUE;
	case CB_INITSTORAGE:
		return  SendMessageA( lphc->hWndLBox, LB_INITSTORAGE, wParam, lParam);
	case CB_GETHORIZONTALEXTENT:
		return  SendMessageA( lphc->hWndLBox, LB_GETHORIZONTALEXTENT, 0, 0);
	case CB_SETHORIZONTALEXTENT:
		return  SendMessageA( lphc->hWndLBox, LB_SETHORIZONTALEXTENT, wParam, 0);
	case CB_GETTOPINDEX:
		return  SendMessageA( lphc->hWndLBox, LB_GETTOPINDEX, 0, 0);
	case CB_GETLOCALE:
		return  SendMessageA( lphc->hWndLBox, LB_GETLOCALE, 0, 0);
	case CB_SETLOCALE:
		return  SendMessageA( lphc->hWndLBox, LB_SETLOCALE, wParam, 0);
	case CB_GETDROPPEDWIDTH:
		if( lphc->droppedWidth )
                    return  lphc->droppedWidth;
		return  lphc->droppedRect.right - lphc->droppedRect.left;
	case CB_SETDROPPEDWIDTH:
		if( (CB_GETTYPE(lphc) != CBS_SIMPLE) &&
		    (INT)wParam < 32768 ) lphc->droppedWidth = (INT)wParam;
		return  CB_ERR;
	case CB_GETDROPPEDCONTROLRECT16:
		lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
		if( lParam ) 
		{
		    RECT	r;
		    CBGetDroppedControlRect( lphc, &r );
		    CONV_RECT32TO16( &r, (LPRECT16)lParam );
		}
		return  CB_OKAY;
	case CB_GETDROPPEDCONTROLRECT:
		if( lParam ) CBGetDroppedControlRect(lphc, (LPRECT)lParam );
		return  CB_OKAY;
	case CB_GETDROPPEDSTATE16:
	case CB_GETDROPPEDSTATE:
		return  (lphc->wState & CBF_DROPPED) ? TRUE : FALSE;
	case CB_DIR16: 
                lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
                /* fall through */
	case CB_DIR:
		return  COMBO_Directory( lphc, (UINT)wParam, 
				       (LPSTR)lParam, (message == CB_DIR));
	case CB_SHOWDROPDOWN16:
	case CB_SHOWDROPDOWN:
		if( CB_GETTYPE(lphc) != CBS_SIMPLE )
		{
		    if( wParam )
		    {
			if( !(lphc->wState & CBF_DROPPED) )
			    CBDropDown( lphc );
		    }
		    else 
			if( lphc->wState & CBF_DROPPED ) 
		            CBRollUp( lphc, FALSE, TRUE );
		}
		return  TRUE;
	case CB_GETCOUNT16: 
	case CB_GETCOUNT:
		return  SendMessageA( lphc->hWndLBox, LB_GETCOUNT, 0, 0);
	case CB_GETCURSEL16: 
	case CB_GETCURSEL:
		return  SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0);
	case CB_SETCURSEL16:
		wParam = (INT)(INT16)wParam;
	case CB_SETCURSEL:
		lParam = SendMessageA( lphc->hWndLBox, LB_SETCURSEL, wParam, 0);
		if( lphc->wState & CBF_SELCHANGE )
		{
		    /* no LBN_SELCHANGE in this case, update manually */
		    InvalidateRect(CB_HWND(lphc), &lphc->textRect, TRUE);
		    lphc->wState &= ~CBF_SELCHANGE;
		}
	        return  lParam;
	case CB_GETLBTEXT16: 
		wParam = (INT)(INT16)wParam;
		lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
	case CB_GETLBTEXT:
		return  SendMessageA( lphc->hWndLBox, LB_GETTEXT, wParam, lParam);
	case CB_GETLBTEXTLEN16: 
		wParam = (INT)(INT16)wParam;
	case CB_GETLBTEXTLEN:
		return  SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, wParam, 0);
	case CB_GETITEMDATA16:
		wParam = (INT)(INT16)wParam;
	case CB_GETITEMDATA:
		return  SendMessageA( lphc->hWndLBox, LB_GETITEMDATA, wParam, 0);
	case CB_SETITEMDATA16:
		wParam = (INT)(INT16)wParam;
	case CB_SETITEMDATA:
		return  SendMessageA( lphc->hWndLBox, LB_SETITEMDATA, wParam, lParam);
	case CB_GETEDITSEL16: 
		wParam = lParam = 0;   /* just in case */
	case CB_GETEDITSEL:
		if( lphc->wState & CBF_EDIT )
		{
		    INT	a, b;

		    return  SendMessageA( lphc->hWndEdit, EM_GETSEL,
					   (wParam) ? wParam : (WPARAM)&a,
					   (lParam) ? lParam : (LPARAM)&b );
		}
		return  CB_ERR;
	case CB_SETEDITSEL16: 
	case CB_SETEDITSEL:
		if( lphc->wState & CBF_EDIT ) 
                    return  SendMessageA( lphc->hWndEdit, EM_SETSEL,
			  (INT)(INT16)LOWORD(lParam), (INT)(INT16)HIWORD(lParam) );
		return  CB_ERR;
	case CB_SETEXTENDEDUI16:
	case CB_SETEXTENDEDUI:
                if( CB_GETTYPE(lphc) == CBS_SIMPLE )
                    return  CB_ERR;
		if( wParam )
		    lphc->wState |= CBF_EUI;
		else lphc->wState &= ~CBF_EUI;
		return  CB_OKAY;
	case CB_GETEXTENDEDUI16:
	case CB_GETEXTENDEDUI:
		return  (lphc->wState & CBF_EUI) ? TRUE : FALSE;
	case (WM_USER + 0x1B):
	        WARN("[%04x]: undocumented msg!\n", hwnd );
    }
    return DefWindowProcA(hwnd, message, wParam, lParam);
  }
  return CB_ERR;
}

/***********************************************************************
 *           ComboWndProc
 *
 * This is just a wrapper for the real ComboWndProc which locks/unlocks
 * window structs.
 */
LRESULT WINAPI ComboWndProc( HWND hwnd, UINT message,
                             WPARAM wParam, LPARAM lParam )
{
    WND*	pWnd = WIN_FindWndPtr(hwnd);
    LRESULT retvalue = ComboWndProc_locked(pWnd,message,wParam,lParam);

    
    WIN_ReleaseWndPtr(pWnd);
    return retvalue;
}