Made HEAP_strdup* functions inline (temporary).

[wine/multimedia.git] / dlls / comctl32 / tab.c

/*
 * Tab control
 *
 * Copyright 1998 Anders Carlsson
 * Copyright 1999 Alex Priem <alexp@sci.kun.nl>
 * Copyright 1999 Francis Beaudet
 *
 * TODO:
 *  Image list support
 *  Unicode support (under construction)
 *
 * FIXME:
 *  UpDown control not displayed until after a tab is clicked on
 */

#include <string.h>

#include "winbase.h"
#include "commctrl.h"
#include "comctl32.h"
#include "debugtools.h"
#include <math.h>

DEFAULT_DEBUG_CHANNEL(tab);

typedef struct
{
  UINT   mask;
  DWORD  dwState;
  LPWSTR pszText;
  INT    iImage;
  LPARAM lParam;
  RECT   rect;    /* bounding rectangle of the item relative to the
                   * leftmost item (the leftmost item, 0, would have a 
                   * "left" member of 0 in this rectangle) 
                   *  
                   * additionally the top member hold the row number
                   * and bottom is unused and should be 0 */
} TAB_ITEM;

typedef struct
{
  UINT       uNumItem;        /* number of tab items */
  UINT       uNumRows;        /* number of tab rows */
  INT        tabHeight;       /* height of the tab row */
  INT        tabWidth;        /* width of tabs */
  HFONT      hFont;           /* handle to the current font */
  HCURSOR    hcurArrow;       /* handle to the current cursor */
  HIMAGELIST himl;            /* handle to a image list (may be 0) */
  HWND       hwndToolTip;     /* handle to tab's tooltip */
  INT        leftmostVisible; /* Used for scrolling, this member contains
                               * the index of the first visible item */
  INT        iSelected;       /* the currently selected item */
  INT        iHotTracked;     /* the highlighted item under the mouse */
  INT        uFocus;          /* item which has the focus */
  TAB_ITEM*  items;           /* pointer to an array of TAB_ITEM's */
  BOOL       DoRedraw;        /* flag for redrawing when tab contents is changed*/
  BOOL       needsScrolling;  /* TRUE if the size of the tabs is greater than 
                               * the size of the control */
  BOOL       fSizeSet;        /* was the size of the tabs explicitly set? */
  BOOL       bUnicode;        /* Unicode control? */
  HWND       hwndUpDown;      /* Updown control used for scrolling */
} TAB_INFO;

/******************************************************************************
 * Positioning constants
 */
#define SELECTED_TAB_OFFSET     2
#define HORIZONTAL_ITEM_PADDING 5
#define VERTICAL_ITEM_PADDING   3
#define ROUND_CORNER_SIZE       2
#define DISPLAY_AREA_PADDINGX   2
#define DISPLAY_AREA_PADDINGY   2
#define CONTROL_BORDER_SIZEX    2
#define CONTROL_BORDER_SIZEY    2
#define BUTTON_SPACINGX         4 
#define BUTTON_SPACINGY         4
#define FLAT_BTN_SPACINGX       8
#define DEFAULT_TAB_WIDTH       96

#define TAB_GetInfoPtr(hwnd) ((TAB_INFO *)GetWindowLongA(hwnd,0))

/******************************************************************************
 * Hot-tracking timer constants
 */
#define TAB_HOTTRACK_TIMER            1
#define TAB_HOTTRACK_TIMER_INTERVAL   100   /* milliseconds */

/******************************************************************************
 * Prototypes
 */
static void TAB_Refresh (HWND hwnd, HDC hdc);
static void TAB_InvalidateTabArea(HWND hwnd, TAB_INFO* infoPtr);
static void TAB_EnsureSelectionVisible(HWND hwnd, TAB_INFO* infoPtr);
static void TAB_DrawItem(HWND hwnd, HDC hdc, INT iItem);
static void TAB_DrawItemInterior(HWND hwnd, HDC hdc, INT iItem, RECT* drawRect);

static BOOL
TAB_SendSimpleNotify (HWND hwnd, UINT code)
{
    NMHDR nmhdr;

    nmhdr.hwndFrom = hwnd;
    nmhdr.idFrom = GetWindowLongA(hwnd, GWL_ID);
    nmhdr.code = code;

    return (BOOL) SendMessageA (GetParent (hwnd), WM_NOTIFY,
            (WPARAM) nmhdr.idFrom, (LPARAM) &nmhdr);
}

static VOID
TAB_RelayEvent (HWND hwndTip, HWND hwndMsg, UINT uMsg,
            WPARAM wParam, LPARAM lParam)
{
    MSG msg;

    msg.hwnd = hwndMsg;
    msg.message = uMsg;
    msg.wParam = wParam;
    msg.lParam = lParam;
    msg.time = GetMessageTime ();
    msg.pt.x = LOWORD(GetMessagePos ());
    msg.pt.y = HIWORD(GetMessagePos ());

    SendMessageA (hwndTip, TTM_RELAYEVENT, 0, (LPARAM)&msg);
}

static LRESULT
TAB_GetCurSel (HWND hwnd)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
 
    return infoPtr->iSelected;
}

static LRESULT
TAB_GetCurFocus (HWND hwnd)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
 
    return infoPtr->uFocus;
}

static LRESULT
TAB_GetToolTips (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

    if (infoPtr == NULL) return 0;
    return infoPtr->hwndToolTip;
}

static LRESULT
TAB_SetCurSel (HWND hwnd,WPARAM wParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  INT iItem = (INT)wParam;
  INT prevItem;
 
  prevItem = -1;
  if ((iItem >= 0) && (iItem < infoPtr->uNumItem)) {
    prevItem=infoPtr->iSelected;
      infoPtr->iSelected=iItem;
      TAB_EnsureSelectionVisible(hwnd, infoPtr);
      TAB_InvalidateTabArea(hwnd, infoPtr);
  }
  return prevItem;
}

static LRESULT
TAB_SetCurFocus (HWND hwnd,WPARAM wParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  INT iItem=(INT) wParam;
 
  if ((iItem < 0) || (iItem >= infoPtr->uNumItem)) return 0;

  if (GetWindowLongA(hwnd, GWL_STYLE) & TCS_BUTTONS) {
    FIXME("Should set input focus\n");
  } else { 
    if (infoPtr->iSelected != iItem || infoPtr->uFocus == -1 ) {
      infoPtr->uFocus = iItem;
      if (TAB_SendSimpleNotify(hwnd, TCN_SELCHANGING)!=TRUE)  {
        infoPtr->iSelected = iItem;
        TAB_SendSimpleNotify(hwnd, TCN_SELCHANGE);

        TAB_EnsureSelectionVisible(hwnd, infoPtr);
        TAB_InvalidateTabArea(hwnd, infoPtr);
      }
    }
  }
  return 0;
}

static LRESULT
TAB_SetToolTips (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

    if (infoPtr == NULL) return 0;
    infoPtr->hwndToolTip = (HWND)wParam;
    return 0;
}

/******************************************************************************
 * TAB_InternalGetItemRect
 *
 * This method will calculate the rectangle representing a given tab item in
 * client coordinates. This method takes scrolling into account.
 *
 * This method returns TRUE if the item is visible in the window and FALSE
 * if it is completely outside the client area.
 */
static BOOL TAB_InternalGetItemRect(
  HWND        hwnd,
  TAB_INFO*   infoPtr,
  INT         itemIndex,
  RECT*       itemRect,
  RECT*       selectedRect)
{
  RECT tmpItemRect,clientRect;
  LONG        lStyle  = GetWindowLongA(hwnd, GWL_STYLE);
  
  /* Perform a sanity check and a trivial visibility check. */
  if ( (infoPtr->uNumItem <= 0) ||
       (itemIndex >= infoPtr->uNumItem) ||
       (!((lStyle & TCS_MULTILINE) || (lStyle & TCS_VERTICAL)) && (itemIndex < infoPtr->leftmostVisible)) )
    return FALSE;

  /*
   * Avoid special cases in this procedure by assigning the "out"
   * parameters if the caller didn't supply them
   */
  if (itemRect == NULL)
    itemRect = &tmpItemRect;
  
  /* Retrieve the unmodified item rect. */
  *itemRect = infoPtr->items[itemIndex].rect;

  /* calculate the times bottom and top based on the row */
  GetClientRect(hwnd, &clientRect);

  if ((lStyle & TCS_BOTTOM) && !(lStyle & TCS_VERTICAL))
  {
    itemRect->bottom = clientRect.bottom -
                   SELECTED_TAB_OFFSET -
                   itemRect->top * (infoPtr->tabHeight - 2) -
                   ((lStyle & TCS_BUTTONS) ? itemRect->top * BUTTON_SPACINGY : 0);

    itemRect->top = clientRect.bottom -
                   infoPtr->tabHeight -
                   itemRect->top * (infoPtr->tabHeight - 2) -
                   ((lStyle & TCS_BUTTONS) ? itemRect->top * BUTTON_SPACINGY : 0);
  }
  else if((lStyle & TCS_BOTTOM) && (lStyle & TCS_VERTICAL))
  {
    itemRect->right = clientRect.right - SELECTED_TAB_OFFSET - itemRect->left * (infoPtr->tabHeight - 2) -
                      ((lStyle & TCS_BUTTONS) ? itemRect->left * BUTTON_SPACINGY : 0);
    itemRect->left = clientRect.right - infoPtr->tabHeight - itemRect->left * (infoPtr->tabHeight - 2) -
                      ((lStyle & TCS_BUTTONS) ? itemRect->left * BUTTON_SPACINGY : 0);
  }
  else if((lStyle & TCS_VERTICAL) && !(lStyle & TCS_BOTTOM))
  {
    itemRect->right = clientRect.left + infoPtr->tabHeight + itemRect->left * (infoPtr->tabHeight - 2) +
                      ((lStyle & TCS_BUTTONS) ? itemRect->left * BUTTON_SPACINGY : 0);
    itemRect->left = clientRect.left + SELECTED_TAB_OFFSET + itemRect->left * (infoPtr->tabHeight - 2) +
                      ((lStyle & TCS_BUTTONS) ? itemRect->left * BUTTON_SPACINGY : 0);
  }
  else if(!(lStyle & TCS_VERTICAL) && !(lStyle & TCS_BOTTOM)) /* not TCS_BOTTOM and not TCS_VERTICAL */
  {
    itemRect->bottom = clientRect.top + 
                      infoPtr->tabHeight +
                      itemRect->top * (infoPtr->tabHeight - 2) +
                      ((lStyle & TCS_BUTTONS) ? itemRect->top * BUTTON_SPACINGY : 0);
    itemRect->top = clientRect.top + 
                   SELECTED_TAB_OFFSET +
                   itemRect->top * (infoPtr->tabHeight - 2) +
                   ((lStyle & TCS_BUTTONS) ? itemRect->top * BUTTON_SPACINGY : 0);
 }

  /*
   * "scroll" it to make sure the item at the very left of the 
   * tab control is the leftmost visible tab.
   */
  if(lStyle & TCS_VERTICAL)
  {
    OffsetRect(itemRect,
             0,
             -(clientRect.bottom - infoPtr->items[infoPtr->leftmostVisible].rect.bottom));

    /*
     * Move the rectangle so the first item is slightly offset from
     * the bottom of the tab control.
     */
    OffsetRect(itemRect,
             0,
             -SELECTED_TAB_OFFSET);

  } else
  {
    OffsetRect(itemRect,
             -infoPtr->items[infoPtr->leftmostVisible].rect.left, 
             0);

    /*
     * Move the rectangle so the first item is slightly offset from
     * the left of the tab control.
     */
    OffsetRect(itemRect,
             SELECTED_TAB_OFFSET,
             0);
  }

  /* Now, calculate the position of the item as if it were selected. */
  if (selectedRect!=NULL)
  {
    CopyRect(selectedRect, itemRect);

    /* The rectangle of a selected item is a bit wider. */
    if(lStyle & TCS_VERTICAL)
      InflateRect(selectedRect, 0, SELECTED_TAB_OFFSET);
    else
      InflateRect(selectedRect, SELECTED_TAB_OFFSET, 0);

    /* If it also a bit higher. */
    if ((lStyle & TCS_BOTTOM) && !(lStyle & TCS_VERTICAL))
    {      
      selectedRect->top -= 2; /* the border is thicker on the bottom */
      selectedRect->bottom += SELECTED_TAB_OFFSET;
    }
    else if((lStyle & TCS_BOTTOM) && (lStyle & TCS_VERTICAL))
    {
      selectedRect->left -= 2; /* the border is thicker on the right */
      selectedRect->right += SELECTED_TAB_OFFSET;
    }
    else if(lStyle & TCS_VERTICAL)
    {
      selectedRect->left -= SELECTED_TAB_OFFSET;
      selectedRect->right += 1;
    }
    else
    {
      selectedRect->top -= SELECTED_TAB_OFFSET;
      selectedRect->bottom += 1;
    }
  }

  return TRUE;
}

static BOOL TAB_GetItemRect(HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  return TAB_InternalGetItemRect(hwnd, TAB_GetInfoPtr(hwnd), (INT)wParam, 
                                 (LPRECT)lParam, (LPRECT)NULL);
}

/******************************************************************************
 * TAB_KeyUp
 *
 * This method is called to handle keyboard input
 */
static LRESULT TAB_KeyUp(
  HWND   hwnd, 
  WPARAM keyCode)
{
  TAB_INFO* infoPtr = TAB_GetInfoPtr(hwnd);
  int       newItem = -1;

  switch (keyCode)
  {
    case VK_LEFT:
      newItem = infoPtr->uFocus - 1;
      break;
    case VK_RIGHT:
      newItem = infoPtr->uFocus + 1;
      break;
  }
  
  /*
   * If we changed to a valid item, change the selection
   */
  if ((newItem >= 0) &&
       (newItem < infoPtr->uNumItem) &&
       (infoPtr->uFocus != newItem))
  {
    if (!TAB_SendSimpleNotify(hwnd, TCN_SELCHANGING))
    {
      infoPtr->iSelected = newItem;
      infoPtr->uFocus    = newItem;
      TAB_SendSimpleNotify(hwnd, TCN_SELCHANGE);

      TAB_EnsureSelectionVisible(hwnd, infoPtr);
      TAB_InvalidateTabArea(hwnd, infoPtr);
    }
  }

  return 0;
}

/******************************************************************************
 * TAB_FocusChanging
 *
 * This method is called whenever the focus goes in or out of this control
 * it is used to update the visual state of the control.
 */
static LRESULT TAB_FocusChanging(
  HWND   hwnd, 
  UINT   uMsg, 
  WPARAM wParam, 
  LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  RECT      selectedRect;
  BOOL      isVisible;

  /*
   * Get the rectangle for the item.
   */
  isVisible = TAB_InternalGetItemRect(hwnd,
                                      infoPtr,
                                      infoPtr->uFocus,
                                      NULL,
                                      &selectedRect);
  
  /*
   * If the rectangle is not completely invisible, invalidate that
   * portion of the window.
   */
  if (isVisible)
  {
    InvalidateRect(hwnd, &selectedRect, TRUE);
  }

  /*
   * Don't otherwise disturb normal behavior.
   */
  return DefWindowProcA (hwnd, uMsg, wParam, lParam);
}

static HWND TAB_InternalHitTest (
  HWND      hwnd,
  TAB_INFO* infoPtr, 
  POINT     pt, 
  UINT*     flags)

{
  RECT rect;
  int iCount; 
  
  for (iCount = 0; iCount < infoPtr->uNumItem; iCount++)
  {
    TAB_InternalGetItemRect(hwnd, infoPtr, iCount, &rect, NULL);

    if (PtInRect(&rect, pt))
    {
      *flags = TCHT_ONITEM;
      return iCount;
    }
  }

  *flags = TCHT_NOWHERE;
  return -1;
}

static LRESULT
TAB_HitTest (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  LPTCHITTESTINFO lptest = (LPTCHITTESTINFO) lParam;
  
  return TAB_InternalHitTest (hwnd, infoPtr, lptest->pt, &lptest->flags);
}

/******************************************************************************
 * TAB_NCHitTest
 *
 * Napster v2b5 has a tab control for its main navigation which has a client
 * area that covers the whole area of the dialog pages.
 * That's why it receives all msgs for that area and the underlying dialog ctrls
 * are dead.
 * So I decided that we should handle WM_NCHITTEST here and return
 * HTTRANSPARENT if we don't hit the tab control buttons.
 * FIXME: WM_NCHITTEST handling correct ? Fix it if you know that Windows
 * doesn't do it that way. Maybe depends on tab control styles ?
 */
static LRESULT
TAB_NCHitTest (HWND hwnd, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  POINT pt;
  UINT dummyflag;

  pt.x = LOWORD(lParam);
  pt.y = HIWORD(lParam);
  ScreenToClient(hwnd, &pt);

  if (TAB_InternalHitTest(hwnd, infoPtr, pt, &dummyflag) == -1)
    return HTTRANSPARENT;
  else
    return HTCLIENT;
}

static LRESULT
TAB_LButtonDown (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  POINT pt;
  INT newItem, dummy;

  if (infoPtr->hwndToolTip)
    TAB_RelayEvent (infoPtr->hwndToolTip, hwnd,
                    WM_LBUTTONDOWN, wParam, lParam);

  if (GetWindowLongA(hwnd, GWL_STYLE) & TCS_FOCUSONBUTTONDOWN ) {
    SetFocus (hwnd);
  }

  if (infoPtr->hwndToolTip)
    TAB_RelayEvent (infoPtr->hwndToolTip, hwnd,
                    WM_LBUTTONDOWN, wParam, lParam);
  
  pt.x = (INT)LOWORD(lParam);
  pt.y = (INT)HIWORD(lParam);
  
  newItem = TAB_InternalHitTest (hwnd, infoPtr, pt, &dummy);
  
  TRACE("On Tab, item %d\n", newItem);

  if ((newItem != -1) && (infoPtr->iSelected != newItem))
  {
    if (TAB_SendSimpleNotify(hwnd, TCN_SELCHANGING) != TRUE)
    {
      infoPtr->iSelected = newItem;
      infoPtr->uFocus    = newItem;
      TAB_SendSimpleNotify(hwnd, TCN_SELCHANGE);

      TAB_EnsureSelectionVisible(hwnd, infoPtr);

      TAB_InvalidateTabArea(hwnd, infoPtr);
    }
  }
  return 0;
}

static LRESULT
TAB_LButtonUp (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_SendSimpleNotify(hwnd, NM_CLICK);

  return 0;
}

static LRESULT
TAB_RButtonDown (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_SendSimpleNotify(hwnd, NM_RCLICK);
  return 0;
}

/******************************************************************************
 * TAB_DrawLoneItemInterior
 *
 * This calls TAB_DrawItemInterior.  However, TAB_DrawItemInterior is normally
 * called by TAB_DrawItem which is normally called by TAB_Refresh which sets
 * up the device context and font.  This routine does the same setup but
 * only calls TAB_DrawItemInterior for the single specified item.
 */
static void
TAB_DrawLoneItemInterior(HWND hwnd, TAB_INFO* infoPtr, int iItem)
{
  HDC hdc = GetDC(hwnd);
  HFONT hOldFont = SelectObject(hdc, infoPtr->hFont);
  TAB_DrawItemInterior(hwnd, hdc, iItem, NULL);
  SelectObject(hdc, hOldFont);
  ReleaseDC(hwnd, hdc);
}

/******************************************************************************
 * TAB_HotTrackTimerProc
 *
 * When a mouse-move event causes a tab to be highlighted (hot-tracking), a
 * timer is setup so we can check if the mouse is moved out of our window.
 * (We don't get an event when the mouse leaves, the mouse-move events just
 * stop being delivered to our window and just start being delivered to
 * another window.)  This function is called when the timer triggers so
 * we can check if the mouse has left our window.  If so, we un-highlight
 * the hot-tracked tab.
 */
static VOID CALLBACK
TAB_HotTrackTimerProc
  (
  HWND hwnd,    /* handle of window for timer messages */
  UINT uMsg,    /* WM_TIMER message */
  UINT idEvent, /* timer identifier */
  DWORD dwTime  /* current system time */
  )
{
  TAB_INFO* infoPtr = TAB_GetInfoPtr(hwnd);

  if (infoPtr != NULL && infoPtr->iHotTracked >= 0)
  {
    POINT pt;

    /*
    ** If we can't get the cursor position, or if the cursor is outside our
    ** window, we un-highlight the hot-tracked tab.  Note that the cursor is
    ** "outside" even if it is within our bounding rect if another window
    ** overlaps.  Note also that the case where the cursor stayed within our
    ** window but has moved off the hot-tracked tab will be handled by the
    ** WM_MOUSEMOVE event. 
    */
    if (!GetCursorPos(&pt) || WindowFromPoint(pt) != hwnd)
    {
      /* Redraw iHotTracked to look normal */
      INT iRedraw = infoPtr->iHotTracked;
      infoPtr->iHotTracked = -1;
      TAB_DrawLoneItemInterior(hwnd, infoPtr, iRedraw);

      /* Kill this timer */
      KillTimer(hwnd, TAB_HOTTRACK_TIMER);
    }
  }
}

/******************************************************************************
 * TAB_RecalcHotTrack
 *
 * If a tab control has the TCS_HOTTRACK style, then the tab under the mouse
 * should be highlighted.  This function determines which tab in a tab control,
 * if any, is under the mouse and records that information.  The caller may
 * supply output parameters to receive the item number of the tab item which
 * was highlighted but isn't any longer and of the tab item which is now
 * highlighted but wasn't previously.  The caller can use this information to
 * selectively redraw those tab items.
 *
 * If the caller has a mouse position, it can supply it through the pos
 * parameter.  For example, TAB_MouseMove does this.  Otherwise, the caller
 * supplies NULL and this function determines the current mouse position
 * itself.
 */
static void
TAB_RecalcHotTrack
  (
  HWND            hwnd,
  const LPARAM*   pos,
  int*            out_redrawLeave,
  int*            out_redrawEnter
  )
{
  TAB_INFO* infoPtr = TAB_GetInfoPtr(hwnd);

  int item = -1;


  if (out_redrawLeave != NULL)
    *out_redrawLeave = -1;
  if (out_redrawEnter != NULL)
    *out_redrawEnter = -1;

  if (GetWindowLongA(hwnd, GWL_STYLE) & TCS_HOTTRACK)
  {
    POINT pt;
    UINT  flags;

    if (pos == NULL)
    {
      GetCursorPos(&pt);
      ScreenToClient(hwnd, &pt);
    }
    else
    {
      pt.x = LOWORD(*pos);
      pt.y = HIWORD(*pos);
    }

    item = TAB_InternalHitTest(hwnd, infoPtr, pt, &flags);
  }

  if (item != infoPtr->iHotTracked)
  {
    if (infoPtr->iHotTracked >= 0)
    {
      /* Mark currently hot-tracked to be redrawn to look normal */
      if (out_redrawLeave != NULL)
        *out_redrawLeave = infoPtr->iHotTracked;

      if (item < 0)
      {
        /* Kill timer which forces recheck of mouse pos */
        KillTimer(hwnd, TAB_HOTTRACK_TIMER);
      }
    }
    else
    {
      /* Start timer so we recheck mouse pos */
      UINT timerID = SetTimer
        (
        hwnd,
        TAB_HOTTRACK_TIMER,
        TAB_HOTTRACK_TIMER_INTERVAL,
        TAB_HotTrackTimerProc
        );

      if (timerID == 0)
        return; /* Hot tracking not available */
    }

    infoPtr->iHotTracked = item;

    if (item >= 0)
    {
        /* Mark new hot-tracked to be redrawn to look highlighted */
      if (out_redrawEnter != NULL)
        *out_redrawEnter = item;
    }
  }
}

/******************************************************************************
 * TAB_MouseMove
 *
 * Handles the mouse-move event.  Updates tooltips.  Updates hot-tracking.
 */
static LRESULT
TAB_MouseMove (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  int redrawLeave;
  int redrawEnter;

  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

  if (infoPtr->hwndToolTip)
    TAB_RelayEvent (infoPtr->hwndToolTip, hwnd,
                    WM_LBUTTONDOWN, wParam, lParam);

  /* Determine which tab to highlight.  Redraw tabs which change highlight
  ** status. */
  TAB_RecalcHotTrack(hwnd, &lParam, &redrawLeave, &redrawEnter);

  if (redrawLeave != -1)
    TAB_DrawLoneItemInterior(hwnd, infoPtr, redrawLeave);
  if (redrawEnter != -1)
    TAB_DrawLoneItemInterior(hwnd, infoPtr, redrawEnter);

  return 0;
}

/******************************************************************************
 * TAB_AdjustRect
 *
 * Calculates the tab control's display area given the window rectangle or
 * the window rectangle given the requested display rectangle.
 */
static LRESULT TAB_AdjustRect(
  HWND   hwnd, 
  WPARAM fLarger, 
  LPRECT prc)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  DWORD lStyle = GetWindowLongA(hwnd, GWL_STYLE);

  if(lStyle & TCS_VERTICAL)
  {
    if (fLarger) /* Go from display rectangle */
    {
      /* Add the height of the tabs. */
      if (lStyle & TCS_BOTTOM)
        prc->right += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
      else
        prc->left -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;

      /* FIXME: not sure if these InflateRect's need to have different values for TCS_VERTICAL */
      /* Inflate the rectangle for the padding */
      InflateRect(prc, DISPLAY_AREA_PADDINGX, DISPLAY_AREA_PADDINGY);

      /* Inflate for the border */
      InflateRect(prc, CONTROL_BORDER_SIZEX, CONTROL_BORDER_SIZEX);
    }
    else /* Go from window rectangle. */
    {
      /* FIXME: not sure if these InflateRect's need to have different values for TCS_VERTICAL */
      /* Deflate the rectangle for the border */
      InflateRect(prc, -CONTROL_BORDER_SIZEX, -CONTROL_BORDER_SIZEX);

      /* Deflate the rectangle for the padding */
      InflateRect(prc, -DISPLAY_AREA_PADDINGX, -DISPLAY_AREA_PADDINGY);

      /* Remove the height of the tabs. */
      if (lStyle & TCS_BOTTOM)
        prc->right -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
      else
        prc->left += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
    }
  }
  else {
    if (fLarger) /* Go from display rectangle */
    {
      /* Add the height of the tabs. */
      if (lStyle & TCS_BOTTOM)
        prc->bottom += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
      else
        prc->top -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;

      /* Inflate the rectangle for the padding */
      InflateRect(prc, DISPLAY_AREA_PADDINGX, DISPLAY_AREA_PADDINGY);

      /* Inflate for the border */
      InflateRect(prc, CONTROL_BORDER_SIZEX, CONTROL_BORDER_SIZEX);
    }
    else /* Go from window rectangle. */
    {
      /* Deflate the rectangle for the border */
      InflateRect(prc, -CONTROL_BORDER_SIZEX, -CONTROL_BORDER_SIZEX);

      /* Deflate the rectangle for the padding */
      InflateRect(prc, -DISPLAY_AREA_PADDINGX, -DISPLAY_AREA_PADDINGY);

      /* Remove the height of the tabs. */
      if (lStyle & TCS_BOTTOM)
        prc->bottom -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
      else
        prc->top += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
    }
  }

  return 0;
}

/******************************************************************************
 * TAB_OnHScroll
 *
 * This method will handle the notification from the scroll control and
 * perform the scrolling operation on the tab control.
 */
static LRESULT TAB_OnHScroll(
  HWND    hwnd, 
  int     nScrollCode,
  int     nPos,
  HWND    hwndScroll)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

  if(nScrollCode == SB_THUMBPOSITION && nPos != infoPtr->leftmostVisible)
  {
     if(nPos < infoPtr->leftmostVisible)
        infoPtr->leftmostVisible--;
     else
        infoPtr->leftmostVisible++;

     TAB_RecalcHotTrack(hwnd, NULL, NULL, NULL);
     TAB_InvalidateTabArea(hwnd, infoPtr);
     SendMessageA(infoPtr->hwndUpDown, UDM_SETPOS, 0,
                   MAKELONG(infoPtr->leftmostVisible, 0));
   }

   return 0;
}

/******************************************************************************
 * TAB_SetupScroling
 *
 * This method will check the current scrolling state and make sure the 
 * scrolling control is displayed (or not).
 */
static void TAB_SetupScrolling(
  HWND        hwnd,
  TAB_INFO*   infoPtr,
  const RECT* clientRect)
{
  INT maxRange = 0;
  DWORD lStyle = GetWindowLongA(hwnd, GWL_STYLE);

  if (infoPtr->needsScrolling)
  {
    RECT controlPos;
    INT vsize, tabwidth;

    /*
     * Calculate the position of the scroll control.
     */
    if(lStyle & TCS_VERTICAL)
    {
      controlPos.right = clientRect->right;
      controlPos.left  = controlPos.right - 2 * GetSystemMetrics(SM_CXHSCROLL);

      if (lStyle & TCS_BOTTOM)
      {
        controlPos.top    = clientRect->bottom - infoPtr->tabHeight;
        controlPos.bottom = controlPos.top + GetSystemMetrics(SM_CYHSCROLL);
      }
      else
      {
        controlPos.bottom = clientRect->top + infoPtr->tabHeight;
        controlPos.top    = controlPos.bottom - GetSystemMetrics(SM_CYHSCROLL);
      }
    }
    else
    {
      controlPos.right = clientRect->right;
      controlPos.left  = controlPos.right - 2 * GetSystemMetrics(SM_CXHSCROLL);

      if (lStyle & TCS_BOTTOM)
      {
        controlPos.top    = clientRect->bottom - infoPtr->tabHeight;
        controlPos.bottom = controlPos.top + GetSystemMetrics(SM_CYHSCROLL);
      }
      else
      {
        controlPos.bottom = clientRect->top + infoPtr->tabHeight;
        controlPos.top    = controlPos.bottom - GetSystemMetrics(SM_CYHSCROLL);
      }
    }

    /*
     * If we don't have a scroll control yet, we want to create one.
     * If we have one, we want to make sure it's positioned properly.
     */
    if (infoPtr->hwndUpDown==0)
    {
      infoPtr->hwndUpDown = CreateWindowA("msctls_updown32",
                                          "",
                                          WS_VISIBLE | WS_CHILD | UDS_HORZ,
                                          controlPos.left, controlPos.top,
                                          controlPos.right - controlPos.left,
                                          controlPos.bottom - controlPos.top,
                                          hwnd,
                                          (HMENU)NULL, 
                                          (HINSTANCE)NULL, 
                                          NULL);        
    }
    else
    {
      SetWindowPos(infoPtr->hwndUpDown, 
                   (HWND)NULL,
                   controlPos.left, controlPos.top,
                   controlPos.right - controlPos.left,
                   controlPos.bottom - controlPos.top,
                   SWP_SHOWWINDOW | SWP_NOZORDER);                 
    }

    /* Now calculate upper limit of the updown control range.
     * We do this by calculating how many tabs will be offscreen when the
     * last tab is visible.
     */
    if(infoPtr->uNumItem)
    {
       vsize = clientRect->right - (controlPos.right - controlPos.left + 1);
       maxRange = infoPtr->uNumItem;
       tabwidth = infoPtr->items[maxRange - 1].rect.right;

       for(; maxRange > 0; maxRange--)
       {
          if(tabwidth - infoPtr->items[maxRange - 1].rect.left > vsize)
             break;
       }

       if(maxRange == infoPtr->uNumItem)
          maxRange--;
    }
  }
  else
  {
    /* If we once had a scroll control... hide it */
    if (infoPtr->hwndUpDown!=0)
      ShowWindow(infoPtr->hwndUpDown, SW_HIDE);
  }
  if (infoPtr->hwndUpDown)
     SendMessageA(infoPtr->hwndUpDown, UDM_SETRANGE32, 0, maxRange);
}

/******************************************************************************
 * TAB_SetItemBounds
 *
 * This method will calculate the position rectangles of all the items in the
 * control. The rectangle calculated starts at 0 for the first item in the
 * list and ignores scrolling and selection.
 * It also uses the current font to determine the height of the tab row and
 * it checks if all the tabs fit in the client area of the window. If they
 * dont, a scrolling control is added.
 */
static void TAB_SetItemBounds (HWND hwnd)
{
  TAB_INFO*   infoPtr = TAB_GetInfoPtr(hwnd);
  LONG        lStyle  = GetWindowLongA(hwnd, GWL_STYLE);
  TEXTMETRICA fontMetrics;
  INT         curItem;
  INT         curItemLeftPos;
  INT         curItemRowCount;
  HFONT       hFont, hOldFont;
  HDC         hdc;
  RECT        clientRect;
  SIZE        size;
  INT         iTemp;
  RECT*       rcItem;
  INT         iIndex;

  /*
   * We need to get text information so we need a DC and we need to select
   * a font.
   */
  hdc = GetDC(hwnd); 
    
  hFont = infoPtr->hFont ? infoPtr->hFont : GetStockObject (SYSTEM_FONT);
  hOldFont = SelectObject (hdc, hFont);

  /*
   * We will base the rectangle calculations on the client rectangle
   * of the control.
   */
  GetClientRect(hwnd, &clientRect);

  /* if TCS_VERTICAL then swap the height and width so this code places the tabs along the top of the rectangle */
  /* and we can just rotate them after rather than duplicate all of the below code */
  if(lStyle & TCS_VERTICAL)
  {
     iTemp = clientRect.bottom;
     clientRect.bottom = clientRect.right;
     clientRect.right = iTemp;
  }

  /* The leftmost item will be "0" aligned */
  curItemLeftPos = 0;
  curItemRowCount = 0;

  if (!(lStyle & TCS_FIXEDWIDTH) && !((lStyle & TCS_OWNERDRAWFIXED) && infoPtr->fSizeSet) )
  {
    int item_height;
    int icon_height = 0;

    /* Use the current font to determine the height of a tab. */
    GetTextMetricsA(hdc, &fontMetrics);

    /* Get the icon height */
    if (infoPtr->himl)
      ImageList_GetIconSize(infoPtr->himl, 0, &icon_height);

    /* Take the highest between font or icon */
    if (fontMetrics.tmHeight > icon_height)
      item_height = fontMetrics.tmHeight;
    else
      item_height = icon_height;

    /*
     * Make sure there is enough space for the letters + icon + growing the 
     * selected item + extra space for the selected item.   
     */
    infoPtr->tabHeight = item_height + 2 * VERTICAL_ITEM_PADDING +
        SELECTED_TAB_OFFSET;

  }

  for (curItem = 0; curItem < infoPtr->uNumItem; curItem++)
  {
    /* Set the leftmost position of the tab. */
    infoPtr->items[curItem].rect.left = curItemLeftPos;

    if ( (lStyle & TCS_FIXEDWIDTH) || ((lStyle & TCS_OWNERDRAWFIXED) && infoPtr->fSizeSet))
    {
      infoPtr->items[curItem].rect.right = infoPtr->items[curItem].rect.left +
                                           infoPtr->tabWidth +
                                           2 * HORIZONTAL_ITEM_PADDING;
    }
    else
    {
      int icon_width  = 0;
      int num = 2;

      /* Calculate how wide the tab is depending on the text it contains */
      GetTextExtentPoint32W(hdc, infoPtr->items[curItem].pszText,
                            lstrlenW(infoPtr->items[curItem].pszText), &size);

      /* under Windows, there seems to be a minimum width of 2x the height
       * for button style tabs */
      if (lStyle & TCS_BUTTONS)
              size.cx = max(size.cx, 2 * (infoPtr->tabHeight - 2));

      /* Add the icon width */
      if (infoPtr->himl)
      {
        ImageList_GetIconSize(infoPtr->himl, &icon_width, 0);
        num++;
      }

      infoPtr->items[curItem].rect.right = infoPtr->items[curItem].rect.left +
                                           size.cx + icon_width + 
                                           num * HORIZONTAL_ITEM_PADDING;
    }

    /*
     * Check if this is a multiline tab control and if so
     * check to see if we should wrap the tabs
     *
     * Because we are going to arange all these tabs evenly
     * really we are basically just counting rows at this point
     *
     */

    if (((lStyle & TCS_MULTILINE) || (lStyle & TCS_VERTICAL)) &&
        (infoPtr->items[curItem].rect.right > clientRect.right))
    {
        infoPtr->items[curItem].rect.right -=
                                      infoPtr->items[curItem].rect.left;

        infoPtr->items[curItem].rect.left = 0;
        curItemRowCount++;
    }

    infoPtr->items[curItem].rect.bottom = 0;
    infoPtr->items[curItem].rect.top = curItemRowCount;

    TRACE("TextSize: %li\n", size.cx);
    TRACE("Rect: T %i, L %i, B %i, R %i\n", 
          infoPtr->items[curItem].rect.top,
          infoPtr->items[curItem].rect.left,
          infoPtr->items[curItem].rect.bottom,
          infoPtr->items[curItem].rect.right);  

    /*
     * The leftmost position of the next item is the rightmost position
     * of this one.
     */
    if (lStyle & TCS_BUTTONS)
    {
      curItemLeftPos = infoPtr->items[curItem].rect.right + 1;
      if (lStyle & TCS_FLATBUTTONS)
        curItemLeftPos += FLAT_BTN_SPACINGX;
    }
    else
      curItemLeftPos = infoPtr->items[curItem].rect.right;
  }

  if (!((lStyle & TCS_MULTILINE) || (lStyle & TCS_VERTICAL)))
  {
    /*
     * Check if we need a scrolling control.
     */
    infoPtr->needsScrolling = (curItemLeftPos + (2 * SELECTED_TAB_OFFSET) >
                               clientRect.right);

    /* Don't need scrolling, then update infoPtr->leftmostVisible */
    if(!infoPtr->needsScrolling)
      infoPtr->leftmostVisible = 0; 

    TAB_SetupScrolling(hwnd, infoPtr, &clientRect);
  }

  /* Set the number of rows */
  infoPtr->uNumRows = curItemRowCount;

   if (((lStyle & TCS_MULTILINE) || (lStyle & TCS_VERTICAL)) && (infoPtr->uNumItem > 0))
   {
      INT widthDiff, remainder;
      INT tabPerRow,remTab;
      INT iRow,iItm;
      INT iIndexStart=0,iIndexEnd=0, iCount=0;

      /*
       * Ok Microsoft trys to even out the rows. place the same
       * number of tabs in each row. So lets give that a shot
       *
       */

      tabPerRow = infoPtr->uNumItem / (infoPtr->uNumRows + 1);
      remTab = infoPtr->uNumItem % (infoPtr->uNumRows + 1);

      for (iItm=0,iRow=0,iCount=0,curItemLeftPos=0;
           iItm<infoPtr->uNumItem;
           iItm++,iCount++)
      {
          /* if we have reached the maximum number of tabs on this row */
          /* move to the next row, reset our current item left position and */
          /* the count of items on this row */
          if (iCount >= ((iRow<remTab)?tabPerRow + 1:tabPerRow))
          {
              iRow++;
              curItemLeftPos = 0;
              iCount = 0;
          }

          /* normalize the current rect */

          /* shift the item to the left side of the clientRect */
          infoPtr->items[iItm].rect.right -= 
            infoPtr->items[iItm].rect.left;
          infoPtr->items[iItm].rect.left = 0;

          /* shift the item to the right to place it as the next item in this row */
          infoPtr->items[iItm].rect.left += curItemLeftPos;
          infoPtr->items[iItm].rect.right += curItemLeftPos;
          infoPtr->items[iItm].rect.top = iRow;
          if (lStyle & TCS_BUTTONS)
          {
            curItemLeftPos = infoPtr->items[iItm].rect.right + 1;
            if (lStyle & TCS_FLATBUTTONS)
              curItemLeftPos += FLAT_BTN_SPACINGX;
          }
          else
            curItemLeftPos = infoPtr->items[iItm].rect.right;
      }
          
      /*
       * Justify the rows
       */
      {
         while(iIndexStart < infoPtr->uNumItem)
        {
        /* 
         * find the indexs of the row
         */
        /* find the first item on the next row */
        for (iIndexEnd=iIndexStart;
             (iIndexEnd < infoPtr->uNumItem) && 
               (infoPtr->items[iIndexEnd].rect.top ==
                infoPtr->items[iIndexStart].rect.top) ;
            iIndexEnd++)
        /* intentionaly blank */;

        /* 
         * we need to justify these tabs so they fill the whole given
         * client area
         *
         */
        /* find the amount of space remaining on this row */
        widthDiff = clientRect.right - (2 * SELECTED_TAB_OFFSET) -
                            infoPtr->items[iIndexEnd - 1].rect.right;

        /* iCount is the number of tab items on this row */
        iCount = iIndexEnd - iIndexStart;


        if (iCount > 1)
        {
           remainder = widthDiff % iCount;
           widthDiff = widthDiff / iCount;
           /* add widthDiff/iCount, or extra space/items on row, to each item on this row */
           for (iIndex=iIndexStart,iCount=0; iIndex < iIndexEnd; 
                iIndex++,iCount++)
           {
              infoPtr->items[iIndex].rect.left += iCount * widthDiff;
              infoPtr->items[iIndex].rect.right += (iCount + 1) * widthDiff;
           }
           infoPtr->items[iIndex - 1].rect.right += remainder;
        }
        else /* we have only one item on this row, make it take up the entire row */
        {
          infoPtr->items[iIndexStart].rect.left = clientRect.left;
          infoPtr->items[iIndexStart].rect.right = clientRect.right - 4;
        }


        iIndexStart = iIndexEnd;
        }
      }
  }

  /* if TCS_VERTICAL rotate the tabs so they are along the side of the clientRect */
  if(lStyle & TCS_VERTICAL)
  {
    RECT rcOriginal;
    for(iIndex = 0; iIndex < infoPtr->uNumItem; iIndex++)
    {
      rcItem = &(infoPtr->items[iIndex].rect);

      rcOriginal = *rcItem;

      /* this is rotating the items by 90 degrees around the center of the control */
      rcItem->top = (clientRect.right - (rcOriginal.left - clientRect.left)) - (rcOriginal.right - rcOriginal.left);
      rcItem->bottom = rcItem->top + (rcOriginal.right - rcOriginal.left);
      rcItem->left = rcOriginal.top;
      rcItem->right = rcOriginal.bottom;
    }
  }

  TAB_EnsureSelectionVisible(hwnd,infoPtr);
  TAB_RecalcHotTrack(hwnd, NULL, NULL, NULL);

  /* Cleanup */
  SelectObject (hdc, hOldFont);
  ReleaseDC (hwnd, hdc);
}

/******************************************************************************
 * TAB_DrawItemInterior
 *
 * This method is used to draw the interior (text and icon) of a single tab
 * into the tab control.
 */         
static void
TAB_DrawItemInterior
  (
  HWND        hwnd,
  HDC         hdc,
  INT         iItem,
  RECT*       drawRect
  )
{
  TAB_INFO* infoPtr = TAB_GetInfoPtr(hwnd);
  LONG      lStyle  = GetWindowLongA(hwnd, GWL_STYLE);

  RECT localRect;

  HPEN   htextPen   = GetSysColorPen (COLOR_BTNTEXT);
  HPEN   holdPen;
  INT    oldBkMode;

  if (drawRect == NULL)
  {
    BOOL isVisible;
    RECT itemRect;
    RECT selectedRect;

    /*
     * Get the rectangle for the item.
     */
    isVisible = TAB_InternalGetItemRect(hwnd, infoPtr, iItem, &itemRect, &selectedRect);
    if (!isVisible)
      return;

    /*
     * Make sure drawRect points to something valid; simplifies code.
     */
    drawRect = &localRect;

    /*
     * This logic copied from the part of TAB_DrawItem which draws
     * the tab background.  It's important to keep it in sync.  I
     * would have liked to avoid code duplication, but couldn't figure
     * out how without making spaghetti of TAB_DrawItem.
     */
    if (lStyle & TCS_BUTTONS)
    {
      *drawRect = itemRect;
      if (iItem == infoPtr->iSelected)
      {
        drawRect->right--;
        drawRect->bottom--;
      }
    }
    else
    {
      if (iItem == infoPtr->iSelected)
        *drawRect = selectedRect;
      else
        *drawRect = itemRect;
      drawRect->right--;
      drawRect->bottom--;
    }
  }

  /*
   * Text pen
   */
  holdPen = SelectObject(hdc, htextPen);

  oldBkMode = SetBkMode(hdc, TRANSPARENT);
  SetTextColor(hdc, GetSysColor((iItem == infoPtr->iHotTracked) ? COLOR_HIGHLIGHT : COLOR_BTNTEXT));

  /*
   * Deflate the rectangle to acount for the padding
   */
  if(lStyle & TCS_VERTICAL)
    InflateRect(drawRect, -VERTICAL_ITEM_PADDING, -HORIZONTAL_ITEM_PADDING);
  else
    InflateRect(drawRect, -HORIZONTAL_ITEM_PADDING, -VERTICAL_ITEM_PADDING);


  /*
   * if owner draw, tell the owner to draw
   */
  if ((lStyle & TCS_OWNERDRAWFIXED) && GetParent(hwnd))
  {
    DRAWITEMSTRUCT dis;
    UINT id;

    /*
     * get the control id
     */
    id = GetWindowLongA( hwnd, GWL_ID );

    /* 
     * put together the DRAWITEMSTRUCT
     */
    dis.CtlType    = ODT_TAB;   
    dis.CtlID      = id;                
    dis.itemID     = iItem;             
    dis.itemAction = ODA_DRAWENTIRE;    
    if ( iItem == infoPtr->iSelected )
      dis.itemState = ODS_SELECTED;     
    else                                
      dis.itemState = 0;                
    dis.hwndItem = hwnd;                /* */
    dis.hDC      = hdc;         
    dis.rcItem   = *drawRect;           /* */
    dis.itemData = infoPtr->items[iItem].lParam;

    /*
     * send the draw message
     */
    SendMessageA( GetParent(hwnd), WM_DRAWITEM, (WPARAM)id, (LPARAM)&dis );
  }
  else
  {
    INT cx;
    INT cy;
    UINT uHorizAlign;
    RECT rcTemp;
    RECT rcImage;
    LOGFONTA logfont;
    HFONT hFont;
    HFONT hOldFont = 0; /* stop uninitialized warning */

    INT nEscapement = 0; /* stop uninitialized warning */
    INT nOrientation = 0; /* stop uninitialized warning */
    INT iPointSize;

    /* used to center the icon and text in the tab */
    RECT rcText;
    INT center_offset;

    /* set rcImage to drawRect, we will use top & left in our ImageList_Draw call */
    rcImage = *drawRect;

    rcTemp = *drawRect;

    /*
     * Setup for text output
     */
    oldBkMode = SetBkMode(hdc, TRANSPARENT);
    SetTextColor(hdc, GetSysColor((iItem == infoPtr->iHotTracked) ? COLOR_HIGHLIGHT : COLOR_BTNTEXT));

    /* get the rectangle that the text fits in */
    DrawTextW(hdc, infoPtr->items[iItem].pszText, -1,
              &rcText, DT_CALCRECT);

    /*
     * If not owner draw, then do the drawing ourselves.
     *
     * Draw the icon.
     */
    if (infoPtr->himl && (infoPtr->items[iItem].mask & TCIF_IMAGE))
    {
      ImageList_GetIconSize(infoPtr->himl, &cx, &cy);

      if(lStyle & TCS_VERTICAL)
        center_offset = ((drawRect->bottom - drawRect->top) - (cy + VERTICAL_ITEM_PADDING + (rcText.right - rcText.left))) / 2;
      else
        center_offset = ((drawRect->right - drawRect->left) - (cx + HORIZONTAL_ITEM_PADDING + (rcText.right - rcText.left))) / 2;

      if((lStyle & TCS_VERTICAL) && (lStyle & TCS_BOTTOM))
      {
        /* rcImage.left = drawRect->left; */ /* explicit from above rcImage = *drawRect */
        rcImage.top = drawRect->top + center_offset;
        rcImage.left = drawRect->right - cx; /* if tab is TCS_VERTICAL and TCS_BOTTOM, the text is drawn from the */
                                             /* right side of the tab, but the image still uses the left as its x position */
                                             /* this keeps the image always drawn off of the same side of the tab */
        drawRect->top = rcImage.top + (cx + VERTICAL_ITEM_PADDING);
      }
      else if(lStyle & TCS_VERTICAL)
      {
        /* rcImage.left = drawRect->left; */ /* explicit from above rcImage = *drawRect */
        rcImage.top = drawRect->bottom - cy - center_offset;

        drawRect->bottom = rcImage.top - VERTICAL_ITEM_PADDING;
      }
      else /* normal style, whether TCS_BOTTOM or not */
      {
        rcImage.left = drawRect->left + center_offset;
        /* rcImage.top = drawRect->top; */ /* explicit from above rcImage = *drawRect */

        drawRect->left = rcImage.left + cx + HORIZONTAL_ITEM_PADDING;
      }

      ImageList_Draw
        (
        infoPtr->himl,
        infoPtr->items[iItem].iImage,
        hdc,
        rcImage.left,
        rcImage.top + 1,
        ILD_NORMAL
        );
    } else /* no image, so just shift the drawRect borders around */
    {
      if(lStyle & TCS_VERTICAL)
      {
        center_offset = ((drawRect->bottom - drawRect->top) - (rcText.right - rcText.left)) / 2;

        if(lStyle & TCS_BOTTOM)
          drawRect->top+=center_offset;
        else
          drawRect->bottom-=center_offset;
      }
      else
      {
        center_offset = ((drawRect->right - drawRect->left) - (rcText.right - rcText.left)) / 2;
        drawRect->left+=center_offset;
      }
    }

    /* Draw the text */
    if (lStyle & TCS_RIGHTJUSTIFY)
      uHorizAlign = DT_CENTER;
    else
      uHorizAlign = DT_LEFT;

    if(lStyle & TCS_VERTICAL) /* if we are vertical rotate the text and each character */
    {
      if(lStyle & TCS_BOTTOM)
      {
        nEscapement = -900;
        nOrientation = -900;
      }
      else
      {
        nEscapement = 900;
        nOrientation = 900;
      }
    }

    /* to get a font with the escapement and orientation we are looking for, we need to */
    /* call CreateFontIndirectA, which requires us to set the values of the logfont we pass in */
    if(lStyle & TCS_VERTICAL)
    {
      iPointSize = 9;

      lstrcpyA(logfont.lfFaceName, "Arial");
      logfont.lfHeight = -MulDiv(iPointSize, GetDeviceCaps(hdc, LOGPIXELSY), 72);
      logfont.lfWeight = FW_NORMAL;
      logfont.lfItalic = 0;
      logfont.lfUnderline = 0;
      logfont.lfStrikeOut = 0;

      logfont.lfEscapement = nEscapement;
      logfont.lfOrientation = nOrientation;
      hFont = CreateFontIndirectA(&logfont);
      hOldFont = SelectObject(hdc, hFont);
    }

    ExtTextOutW(hdc,
       ((lStyle & TCS_VERTICAL) && (lStyle & TCS_BOTTOM)) ? drawRect->right : drawRect->left,
       ((lStyle & TCS_VERTICAL) && !(lStyle & TCS_BOTTOM)) ? drawRect->bottom : drawRect->top,
       0,
       0,
       infoPtr->items[iItem].pszText,
       lstrlenW(infoPtr->items[iItem].pszText),
       0);


    /* clean things up */
    *drawRect = rcTemp; /* restore drawRect */

    if(lStyle & TCS_VERTICAL)
      SelectObject(hdc, hOldFont); /* restore the original font */
  }

  /*
  * Cleanup
  */
  SetBkMode(hdc, oldBkMode);
  SelectObject(hdc, holdPen);
}

/******************************************************************************
 * TAB_DrawItem
 *
 * This method is used to draw a single tab into the tab control.
 */         
static void TAB_DrawItem(
  HWND hwnd, 
  HDC  hdc, 
  INT  iItem)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  LONG      lStyle  = GetWindowLongA(hwnd, GWL_STYLE);
  RECT      itemRect;
  RECT      selectedRect;
  BOOL      isVisible;
  RECT      r;

  /*
   * Get the rectangle for the item.
   */
  isVisible = TAB_InternalGetItemRect(hwnd,
                                      infoPtr,
                                      iItem,
                                      &itemRect,
                                      &selectedRect);

  if (isVisible)
  {
    HBRUSH hbr       = CreateSolidBrush (GetSysColor(COLOR_BTNFACE));    
    HPEN   hwPen     = GetSysColorPen (COLOR_3DHILIGHT);
    HPEN hbPen  = GetSysColorPen (COLOR_3DDKSHADOW);
    HPEN hShade = GetSysColorPen (COLOR_BTNSHADOW);

    HPEN   holdPen;
    BOOL   deleteBrush = TRUE;

    if (lStyle & TCS_BUTTONS)
    {
      /* Get item rectangle */
      r = itemRect;

      holdPen = SelectObject (hdc, hwPen);

      /* Separators between flat buttons */
      /* FIXME: test and correct this if necessary for TCS_FLATBUTTONS style */
      if (lStyle & TCS_FLATBUTTONS) 
      {
        int x = r.right + FLAT_BTN_SPACINGX - 2;

        /* highlight */
        MoveToEx (hdc, x, r.bottom - 1, NULL);
        LineTo   (hdc, x, r.top - 1);
        x--;

        /* shadow */
        SelectObject(hdc, hbPen);
        MoveToEx (hdc, x, r.bottom - 1, NULL);
        LineTo   (hdc, x, r.top - 1);

        /* shade */
        SelectObject (hdc, hShade );
        MoveToEx (hdc, x - 1, r.bottom - 1, NULL);
        LineTo   (hdc, x - 1, r.top - 1);
      }

      if (iItem == infoPtr->iSelected)
      {
        /* Background color */
        if (!((lStyle & TCS_OWNERDRAWFIXED) && infoPtr->fSizeSet))
        {
              COLORREF bk = GetSysColor(COLOR_3DHILIGHT);
              DeleteObject(hbr);
              hbr = GetSysColorBrush(COLOR_SCROLLBAR);

              SetTextColor(hdc, GetSysColor(COLOR_3DFACE));
              SetBkColor(hdc, bk);

              /* if COLOR_WINDOW happens to be the same as COLOR_3DHILIGHT
               * we better use 0x55aa bitmap brush to make scrollbar's background
               * look different from the window background.
               */
               if (bk == GetSysColor(COLOR_WINDOW))
                  hbr = COMCTL32_hPattern55AABrush;

              deleteBrush = FALSE;
        }

        /* Erase the background */
        FillRect(hdc, &r, hbr);

        /*
         * Draw the tab now.
         * The rectangles calculated exclude the right and bottom
         * borders of the rectangle. To simplify the following code, those
         * borders are shaved-off beforehand.
         */
        r.right--;
        r.bottom--;

        /* highlight */
        SelectObject(hdc, hwPen);
        MoveToEx (hdc, r.left, r.bottom, NULL);
        LineTo   (hdc, r.right, r.bottom);
        LineTo   (hdc, r.right, r.top + 1);
        
        /* shadow */
        SelectObject(hdc, hbPen);
        LineTo  (hdc, r.left + 1, r.top + 1);
        LineTo  (hdc, r.left + 1, r.bottom);

        /* shade */
        SelectObject (hdc, hShade );
        MoveToEx (hdc, r.right, r.top, NULL);
        LineTo   (hdc, r.left, r.top);
        LineTo   (hdc, r.left, r.bottom);
      }
      else
      {
        /* Erase the background */
        FillRect(hdc, &r, hbr);

        if (!(lStyle & TCS_FLATBUTTONS))
        {
          /* highlight */
          MoveToEx (hdc, r.left, r.bottom, NULL);
          LineTo   (hdc, r.left, r.top);
          LineTo   (hdc, r.right, r.top);
         
          /* shadow */
          SelectObject(hdc, hbPen);
          LineTo  (hdc, r.right, r.bottom);
          LineTo  (hdc, r.left, r.bottom);

          /* shade */
          SelectObject (hdc, hShade );
          MoveToEx (hdc, r.right - 1, r.top, NULL);
          LineTo   (hdc, r.right - 1, r.bottom - 1);
          LineTo   (hdc, r.left + 1, r.bottom - 1);
        }
      }
    }
    else /* !TCS_BUTTONS */
    {
      /* Background color */
      DeleteObject(hbr);
      hbr = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));    

      /* We draw a rectangle of different sizes depending on the selection
       * state. */
      if (iItem == infoPtr->iSelected)
        r = selectedRect;
      else
        r = itemRect;

      /*
       * Erase the background.
       * This is necessary when drawing the selected item since it is larger 
       * than the others, it might overlap with stuff already drawn by the 
       * other tabs
       */     
      FillRect(hdc, &r, hbr);

      /*
       * Draw the tab now.
       * The rectangles calculated exclude the right and bottom
       * borders of the rectangle. To simplify the following code, those
       * borders are shaved-off beforehand.
       */
      r.right--;
      r.bottom--;
      
      holdPen = SelectObject (hdc, hwPen);
      if(lStyle & TCS_VERTICAL)
      {
        if (lStyle & TCS_BOTTOM)
        {
          /* highlight */
          MoveToEx (hdc, r.left, r.top, NULL);
          LineTo   (hdc, r.right - ROUND_CORNER_SIZE, r.top);
          LineTo   (hdc, r.right, r.top + ROUND_CORNER_SIZE);

          /* shadow */
          SelectObject(hdc, hbPen);
          LineTo  (hdc, r.right, r.bottom - ROUND_CORNER_SIZE);
          LineTo  (hdc, r.right - ROUND_CORNER_SIZE, r.bottom);
          LineTo  (hdc, r.left - 1, r.bottom);

          /* shade */
          SelectObject (hdc, hShade );
          MoveToEx (hdc, r.right - 1, r.top, NULL);
          LineTo   (hdc, r.right - 1, r.bottom - 1);
          LineTo   (hdc, r.left - 1,    r.bottom - 1);
        }
        else
        {
          /* highlight */
          MoveToEx (hdc, r.right, r.top, NULL);
          LineTo   (hdc, r.left + ROUND_CORNER_SIZE, r.top);
          LineTo   (hdc, r.left, r.top + ROUND_CORNER_SIZE);
          LineTo   (hdc, r.left, r.bottom - ROUND_CORNER_SIZE);

          /* shadow */
          SelectObject(hdc, hbPen);
          LineTo (hdc, r.left + ROUND_CORNER_SIZE,  r.bottom);
          LineTo (hdc, r.right + 1, r.bottom);

          /* shade */
          SelectObject (hdc, hShade );
          MoveToEx (hdc, r.left + ROUND_CORNER_SIZE - 1, r.bottom - 1, NULL);
          LineTo   (hdc, r.right + 1, r.bottom - 1);
        }
      }
      else
      {
        if (lStyle & TCS_BOTTOM)
        {
          /* highlight */
          MoveToEx (hdc, r.left, r.top, NULL);
          LineTo   (hdc, r.left, r.bottom - ROUND_CORNER_SIZE);
          LineTo   (hdc, r.left + ROUND_CORNER_SIZE, r.bottom);

          /* shadow */
          SelectObject(hdc, hbPen);
          LineTo  (hdc, r.right - ROUND_CORNER_SIZE, r.bottom);
          LineTo  (hdc, r.right, r.bottom - ROUND_CORNER_SIZE);
          LineTo  (hdc, r.right, r.top - 1);

          /* shade */
          SelectObject (hdc, hShade );
          MoveToEx   (hdc, r.left, r.bottom - 1, NULL);
          LineTo   (hdc, r.right - ROUND_CORNER_SIZE - 1, r.bottom - 1);
          LineTo   (hdc, r.right - 1, r.bottom - ROUND_CORNER_SIZE - 1);
          LineTo  (hdc, r.right - 1, r.top - 1);
        }
        else
        {
          /* highlight */
          if(infoPtr->items[iItem].rect.left == 0) /* if leftmost draw the line longer */
            MoveToEx (hdc, r.left, r.bottom, NULL);
          else
            MoveToEx (hdc, r.left, r.bottom - 1, NULL);

          LineTo   (hdc, r.left, r.top + ROUND_CORNER_SIZE);
          LineTo   (hdc, r.left + ROUND_CORNER_SIZE, r.top);
          LineTo   (hdc, r.right - ROUND_CORNER_SIZE, r.top);

          /* shadow */
          SelectObject(hdc, hbPen);
          LineTo (hdc, r.right,  r.top + ROUND_CORNER_SIZE);
          LineTo (hdc, r.right,  r.bottom + 1);


          /* shade */
          SelectObject (hdc, hShade );
          MoveToEx (hdc, r.right - 1, r.top + ROUND_CORNER_SIZE, NULL);
          LineTo   (hdc, r.right - 1, r.bottom + 1);
        }
      }
    }
  
    /* This modifies r to be the text rectangle. */
    TAB_DrawItemInterior(hwnd, hdc, iItem, &r);

    /* Draw the focus rectangle */
    if (((lStyle & TCS_FOCUSNEVER) == 0) &&
         (GetFocus() == hwnd) &&
         (iItem == infoPtr->uFocus) )
    {
      r = itemRect;
      InflateRect(&r, -1, -1);

      DrawFocusRect(hdc, &r);
    }

    /* Cleanup */
    SelectObject(hdc, holdPen);
    if (deleteBrush) DeleteObject(hbr);
  }
}

/******************************************************************************
 * TAB_DrawBorder
 *
 * This method is used to draw the raised border around the tab control
 * "content" area.
 */         
static void TAB_DrawBorder (HWND hwnd, HDC hdc)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  HPEN htmPen;
  HPEN hwPen  = GetSysColorPen (COLOR_3DHILIGHT);
  HPEN hbPen  = GetSysColorPen (COLOR_3DDKSHADOW);
  HPEN hShade = GetSysColorPen (COLOR_BTNSHADOW);
  RECT rect;
  DWORD lStyle = GetWindowLongA(hwnd, GWL_STYLE);

  GetClientRect (hwnd, &rect);

  /*
   * Adjust for the style
   */
  if ((lStyle & TCS_BOTTOM) && !(lStyle & TCS_VERTICAL))
  {
    rect.bottom -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
  }
  else if((lStyle & TCS_BOTTOM) && (lStyle & TCS_VERTICAL))
  {
    rect.right -= (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
  }
  else if(lStyle & TCS_VERTICAL)
  {
    rect.left += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 2;
  }
  else /* not TCS_VERTICAL and not TCS_BOTTOM */
  {
    rect.top += (infoPtr->tabHeight - 2) * (infoPtr->uNumRows + 1) + 1;
  }

  /*
   * Shave-off the right and bottom margins (exluded in the
   * rect)
   */
  rect.right--;
  rect.bottom--;

  /* highlight */
  htmPen = SelectObject (hdc, hwPen);

  MoveToEx (hdc, rect.left, rect.bottom, NULL);
  LineTo (hdc, rect.left, rect.top);
  LineTo (hdc, rect.right, rect.top);

  /* Dark Shadow */
  SelectObject (hdc, hbPen);
  LineTo (hdc, rect.right, rect.bottom );
  LineTo (hdc, rect.left, rect.bottom);

  /* shade */
  SelectObject (hdc, hShade );
  MoveToEx (hdc, rect.right - 1, rect.top, NULL);
  LineTo   (hdc, rect.right - 1, rect.bottom - 1);
  LineTo   (hdc, rect.left,    rect.bottom - 1);

  SelectObject(hdc, htmPen);
}

/******************************************************************************
 * TAB_Refresh
 *
 * This method repaints the tab control..
 */             
static void TAB_Refresh (HWND hwnd, HDC hdc)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  HFONT hOldFont;
  INT i;

  if (!infoPtr->DoRedraw)
    return;

  hOldFont = SelectObject (hdc, infoPtr->hFont);

  if (GetWindowLongA(hwnd, GWL_STYLE) & TCS_BUTTONS)
  {
    for (i = 0; i < infoPtr->uNumItem; i++) 
      TAB_DrawItem (hwnd, hdc, i);
  }
  else
  {
    /* Draw all the non selected item first */
    for (i = 0; i < infoPtr->uNumItem; i++) 
    {
      if (i != infoPtr->iSelected)
        TAB_DrawItem (hwnd, hdc, i);
    }

    /* Now, draw the border, draw it before the selected item
     * since the selected item overwrites part of the border. */
    TAB_DrawBorder (hwnd, hdc);

    /* Then, draw the selected item */
    TAB_DrawItem (hwnd, hdc, infoPtr->iSelected);

    /* If we haven't set the current focus yet, set it now.
     * Only happens when we first paint the tab controls */
    if (infoPtr->uFocus == -1)
      TAB_SetCurFocus(hwnd, infoPtr->iSelected);
  }

  SelectObject (hdc, hOldFont);
}

static DWORD
TAB_GetRowCount (HWND hwnd )
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  
  return infoPtr->uNumRows;
}

static LRESULT
TAB_SetRedraw (HWND hwnd, WPARAM wParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  
  infoPtr->DoRedraw=(BOOL) wParam;
  return 0;
}

static LRESULT TAB_EraseBackground(
  HWND hwnd, 
  HDC  givenDC)
{
  HDC  hdc;
  RECT clientRect;

  HBRUSH brush = CreateSolidBrush(GetSysColor(COLOR_BTNFACE));

  hdc = givenDC ? givenDC : GetDC(hwnd);

  GetClientRect(hwnd, &clientRect);

  FillRect(hdc, &clientRect, brush);

  if (givenDC==0)
    ReleaseDC(hwnd, hdc);

  DeleteObject(brush);

  return 0;
}

/******************************************************************************
 * TAB_EnsureSelectionVisible
 *
 * This method will make sure that the current selection is completely
 * visible by scrolling until it is.
 */
static void TAB_EnsureSelectionVisible(
  HWND      hwnd,
  TAB_INFO* infoPtr)
{
  INT iSelected = infoPtr->iSelected;
  LONG lStyle = GetWindowLongA(hwnd, GWL_STYLE);
  INT iOrigLeftmostVisible = infoPtr->leftmostVisible;

  /* set the items row to the bottommost row or topmost row depending on
   * style */
  if ((infoPtr->uNumRows > 0) && !(lStyle & TCS_BUTTONS))
  {
      INT newselected;
      INT iTargetRow;

      if(lStyle & TCS_VERTICAL)
        newselected = infoPtr->items[iSelected].rect.left;
      else
        newselected = infoPtr->items[iSelected].rect.top;

      /* the target row is always the number of rows as 0 is the row furthest from the clientRect */
      iTargetRow = infoPtr->uNumRows;

      if (newselected != iTargetRow)
      {
         INT i;
         if(lStyle & TCS_VERTICAL)
         {
           for (i=0; i < infoPtr->uNumItem; i++)
           {
             /* move everything in the row of the selected item to the iTargetRow */
             if (infoPtr->items[i].rect.left == newselected )
                 infoPtr->items[i].rect.left = iTargetRow;
             else
             {
               if (infoPtr->items[i].rect.left > newselected)
                 infoPtr->items[i].rect.left-=1;
             }
           }
         }
         else
         {
           for (i=0; i < infoPtr->uNumItem; i++)
           {
             if (infoPtr->items[i].rect.top == newselected )
                 infoPtr->items[i].rect.top = iTargetRow;
             else
             {
               if (infoPtr->items[i].rect.top > newselected)
                 infoPtr->items[i].rect.top-=1;
             }
          }
        }
        TAB_RecalcHotTrack(hwnd, NULL, NULL, NULL);
      }
  }

  /*
   * Do the trivial cases first.
   */
  if ( (!infoPtr->needsScrolling) ||
       (infoPtr->hwndUpDown==0) || (lStyle & TCS_VERTICAL))
    return;

  if (infoPtr->leftmostVisible >= iSelected)
  {
    infoPtr->leftmostVisible = iSelected;
  }
  else
  {
     RECT r;
     INT  width, i;

     /* Calculate the part of the client area that is visible */
     GetClientRect(hwnd, &r);
     width = r.right;

     GetClientRect(infoPtr->hwndUpDown, &r);
     width -= r.right;

     if ((infoPtr->items[iSelected].rect.right -
          infoPtr->items[iSelected].rect.left) >= width )
     {
        /* Special case: width of selected item is greater than visible
         * part of control.
         */
        infoPtr->leftmostVisible = iSelected;
     }
     else
     {
        for (i = infoPtr->leftmostVisible; i < infoPtr->uNumItem; i++)
        {
           if ((infoPtr->items[iSelected].rect.right -
                infoPtr->items[i].rect.left) < width)
              break;
        }
        infoPtr->leftmostVisible = i;
     }
  }

  if (infoPtr->leftmostVisible != iOrigLeftmostVisible)
    TAB_RecalcHotTrack(hwnd, NULL, NULL, NULL);

  SendMessageA(infoPtr->hwndUpDown, UDM_SETPOS, 0,
               MAKELONG(infoPtr->leftmostVisible, 0));
}

/******************************************************************************
 * TAB_InvalidateTabArea
 *
 * This method will invalidate the portion of the control that contains the
 * tabs. It is called when the state of the control changes and needs
 * to be redisplayed
 */
static void TAB_InvalidateTabArea(
  HWND      hwnd,
  TAB_INFO* infoPtr)
{
  RECT clientRect;
  DWORD lStyle = GetWindowLongA(hwnd, GWL_STYLE);

  GetClientRect(hwnd, &clientRect);

  if ((lStyle & TCS_BOTTOM) && !(lStyle & TCS_VERTICAL))
  {
    clientRect.top = clientRect.bottom -
                   infoPtr->tabHeight -
                   (infoPtr->uNumRows) * (infoPtr->tabHeight - 2) -
                   ((lStyle & TCS_BUTTONS) ? (infoPtr->uNumRows) * BUTTON_SPACINGY : 0) - 2;
  }
  else if((lStyle & TCS_BOTTOM) && (lStyle & TCS_VERTICAL))
  {
    clientRect.left = clientRect.right - infoPtr->tabHeight -
                      (infoPtr->uNumRows) * (infoPtr->tabHeight - 2) -
                      ((lStyle & TCS_BUTTONS) ? (infoPtr->uNumRows) * BUTTON_SPACINGY : 0) - 2;
  }
  else if(lStyle & TCS_VERTICAL)
  {
    clientRect.right = clientRect.left + infoPtr->tabHeight +
                       (infoPtr->uNumRows) * (infoPtr->tabHeight - 2) -
                      ((lStyle & TCS_BUTTONS) ? (infoPtr->uNumRows) * BUTTON_SPACINGY : 0) + 1;

  }
  else
  {
    clientRect.bottom = clientRect.top + infoPtr->tabHeight +
                      (infoPtr->uNumRows) * (infoPtr->tabHeight - 2) +
                      ((lStyle & TCS_BUTTONS) ? (infoPtr->uNumRows) * BUTTON_SPACINGY : 0) + 1;
  }

  InvalidateRect(hwnd, &clientRect, TRUE);
}

static LRESULT
TAB_Paint (HWND hwnd, WPARAM wParam)
{
  HDC hdc;
  PAINTSTRUCT ps;
    
  hdc = wParam== 0 ? BeginPaint (hwnd, &ps) : (HDC)wParam;
  TAB_Refresh (hwnd, hdc);
    
  if(!wParam)
    EndPaint (hwnd, &ps);

  return 0;
}

static LRESULT
TAB_InsertItemA (HWND hwnd, WPARAM wParam, LPARAM lParam)
{    
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  TCITEMA *pti;
  INT iItem;
  RECT rect;
  
  GetClientRect (hwnd, &rect);
  TRACE("Rect: %x T %i, L %i, B %i, R %i\n", hwnd,
        rect.top, rect.left, rect.bottom, rect.right);  
  
  pti = (TCITEMA *)lParam;
  iItem = (INT)wParam;
  
  if (iItem < 0) return -1;
  if (iItem > infoPtr->uNumItem)
    iItem = infoPtr->uNumItem;
  
  if (infoPtr->uNumItem == 0) {
    infoPtr->items = COMCTL32_Alloc (sizeof (TAB_ITEM));
    infoPtr->uNumItem++;
    infoPtr->iSelected = 0;
  }
  else {
    TAB_ITEM *oldItems = infoPtr->items;
    
    infoPtr->uNumItem++;
    infoPtr->items = COMCTL32_Alloc (sizeof (TAB_ITEM) * infoPtr->uNumItem);
    
    /* pre insert copy */
    if (iItem > 0) {
      memcpy (&infoPtr->items[0], &oldItems[0],
              iItem * sizeof(TAB_ITEM));
    }
    
    /* post insert copy */
    if (iItem < infoPtr->uNumItem - 1) {
      memcpy (&infoPtr->items[iItem+1], &oldItems[iItem],
              (infoPtr->uNumItem - iItem - 1) * sizeof(TAB_ITEM));
      
    }

    if (iItem <= infoPtr->iSelected)
      infoPtr->iSelected++;

    COMCTL32_Free (oldItems);
  }
  
  infoPtr->items[iItem].mask = pti->mask;
  if (pti->mask & TCIF_TEXT)
    Str_SetPtrAtoW (&infoPtr->items[iItem].pszText, pti->pszText);

  if (pti->mask & TCIF_IMAGE)
    infoPtr->items[iItem].iImage = pti->iImage;
  
  if (pti->mask & TCIF_PARAM)
    infoPtr->items[iItem].lParam = pti->lParam;
  
  TAB_SetItemBounds(hwnd);
  TAB_InvalidateTabArea(hwnd, infoPtr);
  
  TRACE("[%04x]: added item %d '%s'\n",
        hwnd, iItem, debugstr_w(infoPtr->items[iItem].pszText));

  return iItem;
}


static LRESULT
TAB_InsertItemW (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  TCITEMW *pti;
  INT iItem;
  RECT rect;

  GetClientRect (hwnd, &rect);
  TRACE("Rect: %x T %i, L %i, B %i, R %i\n", hwnd,
        rect.top, rect.left, rect.bottom, rect.right);

  pti = (TCITEMW *)lParam;
  iItem = (INT)wParam;

  if (iItem < 0) return -1;
  if (iItem > infoPtr->uNumItem)
    iItem = infoPtr->uNumItem;

  if (infoPtr->uNumItem == 0) {
    infoPtr->items = COMCTL32_Alloc (sizeof (TAB_ITEM));
    infoPtr->uNumItem++;
    infoPtr->iSelected = 0;
  }
  else {
    TAB_ITEM *oldItems = infoPtr->items;

    infoPtr->uNumItem++;
    infoPtr->items = COMCTL32_Alloc (sizeof (TAB_ITEM) * infoPtr->uNumItem);

    /* pre insert copy */
    if (iItem > 0) {
      memcpy (&infoPtr->items[0], &oldItems[0],
              iItem * sizeof(TAB_ITEM));
    }

    /* post insert copy */
    if (iItem < infoPtr->uNumItem - 1) {
      memcpy (&infoPtr->items[iItem+1], &oldItems[iItem],
              (infoPtr->uNumItem - iItem - 1) * sizeof(TAB_ITEM));

  }
  
    if (iItem <= infoPtr->iSelected)
      infoPtr->iSelected++;

    COMCTL32_Free (oldItems);
  }

  infoPtr->items[iItem].mask = pti->mask;
  if (pti->mask & TCIF_TEXT)
    Str_SetPtrW (&infoPtr->items[iItem].pszText, pti->pszText);

  if (pti->mask & TCIF_IMAGE)
    infoPtr->items[iItem].iImage = pti->iImage;
  
  if (pti->mask & TCIF_PARAM)
    infoPtr->items[iItem].lParam = pti->lParam;
  
  TAB_SetItemBounds(hwnd);
  TAB_InvalidateTabArea(hwnd, infoPtr);
  
  TRACE("[%04x]: added item %d '%s'\n",
        hwnd, iItem, debugstr_w(infoPtr->items[iItem].pszText));

  return iItem;
}


static LRESULT 
TAB_SetItemSize (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  LONG lStyle = GetWindowLongA(hwnd, GWL_STYLE);
  LONG lResult = 0;

  if ((lStyle & TCS_FIXEDWIDTH) || (lStyle & TCS_OWNERDRAWFIXED))
  {
    lResult = MAKELONG(infoPtr->tabWidth, infoPtr->tabHeight);
    infoPtr->tabWidth = (INT)LOWORD(lParam);
    infoPtr->tabHeight = (INT)HIWORD(lParam);
  }
  infoPtr->fSizeSet = TRUE;

  return lResult;
}

static LRESULT 
TAB_SetItemA (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  TCITEMA *tabItem; 
  TAB_ITEM *wineItem;
  INT    iItem;

  iItem = (INT)wParam;
  tabItem = (LPTCITEMA)lParam;

  TRACE("%d %p\n", iItem, tabItem);
  if ((iItem<0) || (iItem>=infoPtr->uNumItem)) return FALSE;

  wineItem = &infoPtr->items[iItem];

  if (tabItem->mask & TCIF_IMAGE)
    wineItem->iImage = tabItem->iImage;

  if (tabItem->mask & TCIF_PARAM)
    wineItem->lParam = tabItem->lParam;

  if (tabItem->mask & TCIF_RTLREADING) 
    FIXME("TCIF_RTLREADING\n");

  if (tabItem->mask & TCIF_STATE) 
    wineItem->dwState = tabItem->dwState;

  if (tabItem->mask & TCIF_TEXT)
   Str_SetPtrAtoW(&wineItem->pszText, tabItem->pszText);

  /* Update and repaint tabs */
  TAB_SetItemBounds(hwnd);
  TAB_InvalidateTabArea(hwnd,infoPtr);

  return TRUE;
  }


static LRESULT
TAB_SetItemW (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  TCITEMW *tabItem;
  TAB_ITEM *wineItem;
  INT    iItem;

  iItem = (INT)wParam;
  tabItem = (LPTCITEMW)lParam;

  TRACE("%d %p\n", iItem, tabItem);
  if ((iItem<0) || (iItem>=infoPtr->uNumItem)) return FALSE;

  wineItem = &infoPtr->items[iItem];

  if (tabItem->mask & TCIF_IMAGE)
    wineItem->iImage = tabItem->iImage;

  if (tabItem->mask & TCIF_PARAM)
    wineItem->lParam = tabItem->lParam;

  if (tabItem->mask & TCIF_RTLREADING)
    FIXME("TCIF_RTLREADING\n");

  if (tabItem->mask & TCIF_STATE)
    wineItem->dwState = tabItem->dwState;

  if (tabItem->mask & TCIF_TEXT)
   Str_SetPtrW(&wineItem->pszText, tabItem->pszText);

  /* Update and repaint tabs */
  TAB_SetItemBounds(hwnd);
  TAB_InvalidateTabArea(hwnd,infoPtr);

  return TRUE;
}


static LRESULT 
TAB_GetItemCount (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
   TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

   return infoPtr->uNumItem;
}


static LRESULT 
TAB_GetItemA (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
   TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
   TCITEMA *tabItem;
   TAB_ITEM *wineItem;
   INT    iItem;

  iItem = (INT)wParam;
  tabItem = (LPTCITEMA)lParam;
  TRACE("\n");
  if ((iItem<0) || (iItem>=infoPtr->uNumItem))
    return FALSE;

  wineItem=& infoPtr->items[iItem];

  if (tabItem->mask & TCIF_IMAGE) 
    tabItem->iImage = wineItem->iImage;

  if (tabItem->mask & TCIF_PARAM) 
    tabItem->lParam = wineItem->lParam;

  if (tabItem->mask & TCIF_RTLREADING) 
    FIXME("TCIF_RTLREADING\n");

  if (tabItem->mask & TCIF_STATE) 
    tabItem->dwState = wineItem->dwState;

  if (tabItem->mask & TCIF_TEXT) 
   Str_GetPtrWtoA (wineItem->pszText, tabItem->pszText, tabItem->cchTextMax);

  return TRUE;
}


static LRESULT 
TAB_GetItemW (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  TCITEMW *tabItem;
  TAB_ITEM *wineItem;
  INT    iItem;

  iItem = (INT)wParam;
  tabItem = (LPTCITEMW)lParam;
  TRACE("\n");
  if ((iItem<0) || (iItem>=infoPtr->uNumItem))
    return FALSE;

  wineItem=& infoPtr->items[iItem];

  if (tabItem->mask & TCIF_IMAGE)
    tabItem->iImage = wineItem->iImage;

  if (tabItem->mask & TCIF_PARAM)
    tabItem->lParam = wineItem->lParam;

  if (tabItem->mask & TCIF_RTLREADING)
    FIXME("TCIF_RTLREADING\n");

  if (tabItem->mask & TCIF_STATE)
    tabItem->dwState = wineItem->dwState;

  if (tabItem->mask & TCIF_TEXT)
   Str_GetPtrW (wineItem->pszText, tabItem->pszText, tabItem->cchTextMax);

  return TRUE;
}


static LRESULT 
TAB_DeleteItem (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  INT iItem = (INT) wParam;
  BOOL bResult = FALSE;

  if ((iItem >= 0) && (iItem < infoPtr->uNumItem))
  {
    TAB_ITEM *oldItems = infoPtr->items;
    
    infoPtr->uNumItem--;
    infoPtr->items = COMCTL32_Alloc(sizeof (TAB_ITEM) * infoPtr->uNumItem);
    
    if (iItem > 0) 
      memcpy(&infoPtr->items[0], &oldItems[0], iItem * sizeof(TAB_ITEM));
    
    if (iItem < infoPtr->uNumItem) 
      memcpy(&infoPtr->items[iItem], &oldItems[iItem + 1],
              (infoPtr->uNumItem - iItem) * sizeof(TAB_ITEM));
    
    COMCTL32_Free(oldItems);

    /* Readjust the selected index */
    if ((iItem == infoPtr->iSelected) && (iItem > 0))
      infoPtr->iSelected--;
      
    if (iItem < infoPtr->iSelected)
      infoPtr->iSelected--;

    if (infoPtr->uNumItem == 0)
      infoPtr->iSelected = -1;

    /* Reposition and repaint tabs */
    TAB_SetItemBounds(hwnd);
    TAB_InvalidateTabArea(hwnd,infoPtr);

    bResult = TRUE;
  }

  return bResult;
}

static LRESULT 
TAB_DeleteAllItems (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
   TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

  COMCTL32_Free (infoPtr->items);
  infoPtr->uNumItem = 0;
  infoPtr->iSelected = -1;
  if (infoPtr->iHotTracked >= 0)
    KillTimer(hwnd, TAB_HOTTRACK_TIMER);
  infoPtr->iHotTracked = -1;
 
  TAB_SetItemBounds(hwnd);
  TAB_InvalidateTabArea(hwnd,infoPtr);
  return TRUE;
}


static LRESULT
TAB_GetFont (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

  TRACE("\n");
  return (LRESULT)infoPtr->hFont;
}

static LRESULT
TAB_SetFont (HWND hwnd, WPARAM wParam, LPARAM lParam)

{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  
  TRACE("%x %lx\n",wParam, lParam);
  
  infoPtr->hFont = (HFONT)wParam;
  
  TAB_SetItemBounds(hwnd);

  TAB_InvalidateTabArea(hwnd, infoPtr);

  return 0;
}


static LRESULT
TAB_GetImageList (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);

  TRACE("\n");
  return (LRESULT)infoPtr->himl;
}

static LRESULT
TAB_SetImageList (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
    HIMAGELIST himlPrev;

    TRACE("\n");
    himlPrev = infoPtr->himl;
    infoPtr->himl= (HIMAGELIST)lParam;
    return (LRESULT)himlPrev;
}

static LRESULT
TAB_GetUnicodeFormat (HWND hwnd)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr (hwnd);
    return infoPtr->bUnicode;
}

static LRESULT
TAB_SetUnicodeFormat (HWND hwnd, WPARAM wParam)
{
    TAB_INFO *infoPtr = TAB_GetInfoPtr (hwnd);
    BOOL bTemp = infoPtr->bUnicode;

    infoPtr->bUnicode = (BOOL)wParam;

    return bTemp;
}

static LRESULT
TAB_Size (HWND hwnd, WPARAM wParam, LPARAM lParam)

{
/* I'm not really sure what the following code was meant to do.
   This is what it is doing:
   When WM_SIZE is sent with SIZE_RESTORED, the control
   gets positioned in the top left corner.

  RECT parent_rect;
  HWND parent;
  UINT uPosFlags,cx,cy;

  uPosFlags=0;
  if (!wParam) {
    parent = GetParent (hwnd);
    GetClientRect(parent, &parent_rect);
    cx=LOWORD (lParam);
    cy=HIWORD (lParam);
    if (GetWindowLongA(hwnd, GWL_STYLE) & CCS_NORESIZE) 
        uPosFlags |= (SWP_NOSIZE | SWP_NOMOVE);

    SetWindowPos (hwnd, 0, parent_rect.left, parent_rect.top,
            cx, cy, uPosFlags | SWP_NOZORDER);
  } else {
    FIXME("WM_SIZE flag %x %lx not handled\n", wParam, lParam);
  } */

  /* Recompute the size/position of the tabs. */
  TAB_SetItemBounds (hwnd);

  /* Force a repaint of the control. */
  InvalidateRect(hwnd, NULL, TRUE);

  return 0;
}


static LRESULT 
TAB_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr;
  TEXTMETRICA fontMetrics;
  HDC hdc;
  HFONT hOldFont;
  DWORD dwStyle;

  infoPtr = (TAB_INFO *)COMCTL32_Alloc (sizeof(TAB_INFO));

  SetWindowLongA(hwnd, 0, (DWORD)infoPtr);
   
  infoPtr->uNumItem        = 0;
  infoPtr->uNumRows        = 0;
  infoPtr->hFont           = 0;
  infoPtr->items           = 0;
  infoPtr->hcurArrow       = LoadCursorA (0, IDC_ARROWA);
  infoPtr->iSelected       = -1;
  infoPtr->iHotTracked     = -1;
  infoPtr->uFocus          = -1;  
  infoPtr->hwndToolTip     = 0;
  infoPtr->DoRedraw        = TRUE;
  infoPtr->needsScrolling  = FALSE;
  infoPtr->hwndUpDown      = 0;
  infoPtr->leftmostVisible = 0;
  infoPtr->fSizeSet        = FALSE;
  infoPtr->bUnicode        = IsWindowUnicode (hwnd);
  
  TRACE("Created tab control, hwnd [%04x]\n", hwnd); 

  /* The tab control always has the WS_CLIPSIBLINGS style. Even 
     if you don't specify it in CreateWindow. This is necessary in 
     order for paint to work correctly. This follows windows behaviour. */
  dwStyle = GetWindowLongA(hwnd, GWL_STYLE);
  SetWindowLongA(hwnd, GWL_STYLE, dwStyle|WS_CLIPSIBLINGS);

  if (dwStyle & TCS_TOOLTIPS) {
    /* Create tooltip control */
    infoPtr->hwndToolTip =
      CreateWindowExA (0, TOOLTIPS_CLASSA, NULL, 0,
                       CW_USEDEFAULT, CW_USEDEFAULT,
                       CW_USEDEFAULT, CW_USEDEFAULT,
                       hwnd, 0, 0, 0);
    
    /* Send NM_TOOLTIPSCREATED notification */
    if (infoPtr->hwndToolTip) {
      NMTOOLTIPSCREATED nmttc;
      
      nmttc.hdr.hwndFrom = hwnd;
      nmttc.hdr.idFrom = GetWindowLongA(hwnd, GWL_ID);
      nmttc.hdr.code = NM_TOOLTIPSCREATED;
      nmttc.hwndToolTips = infoPtr->hwndToolTip;
      
      SendMessageA (GetParent (hwnd), WM_NOTIFY,
                    (WPARAM)GetWindowLongA(hwnd, GWL_ID), (LPARAM)&nmttc);
    }
  }  
    
  /*
   * We need to get text information so we need a DC and we need to select
   * a font.
   */
  hdc = GetDC(hwnd); 
  hOldFont = SelectObject (hdc, GetStockObject (SYSTEM_FONT));

  /* Use the system font to determine the initial height of a tab. */
  GetTextMetricsA(hdc, &fontMetrics);

  /*
   * Make sure there is enough space for the letters + growing the 
   * selected item + extra space for the selected item.   
   */
  infoPtr->tabHeight = fontMetrics.tmHeight + 2 * VERTICAL_ITEM_PADDING +
                       SELECTED_TAB_OFFSET;

  /* Initialize the width of a tab. */
  infoPtr->tabWidth = DEFAULT_TAB_WIDTH;

  SelectObject (hdc, hOldFont);
  ReleaseDC(hwnd, hdc);

  return 0;
}

static LRESULT
TAB_Destroy (HWND hwnd, WPARAM wParam, LPARAM lParam)
{
  TAB_INFO *infoPtr = TAB_GetInfoPtr(hwnd);
  INT iItem;

  if (!infoPtr)
      return 0;

  if (infoPtr->items) {
    for (iItem = 0; iItem < infoPtr->uNumItem; iItem++) {
      if (infoPtr->items[iItem].pszText)
        COMCTL32_Free (infoPtr->items[iItem].pszText);
    }
    COMCTL32_Free (infoPtr->items);
  }
  
  if (infoPtr->hwndToolTip) 
    DestroyWindow (infoPtr->hwndToolTip);
 
  if (infoPtr->hwndUpDown)
    DestroyWindow(infoPtr->hwndUpDown);

  if (infoPtr->iHotTracked >= 0)
    KillTimer(hwnd, TAB_HOTTRACK_TIMER);

  COMCTL32_Free (infoPtr);
  SetWindowLongA(hwnd, 0, 0);
  return 0;
}

static LRESULT WINAPI
TAB_WindowProc (HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{

    TRACE("hwnd=%x msg=%x wParam=%x lParam=%lx\n", hwnd, uMsg, wParam, lParam);
    if (!TAB_GetInfoPtr(hwnd) && (uMsg != WM_CREATE))
      return DefWindowProcA (hwnd, uMsg, wParam, lParam);

    switch (uMsg)
    {
    case TCM_GETIMAGELIST:
      return TAB_GetImageList (hwnd, wParam, lParam);
      
    case TCM_SETIMAGELIST:
      return TAB_SetImageList (hwnd, wParam, lParam);
      
    case TCM_GETITEMCOUNT:
      return TAB_GetItemCount (hwnd, wParam, lParam);
      
    case TCM_GETITEMA:
      return TAB_GetItemA (hwnd, wParam, lParam);
      
    case TCM_GETITEMW:
      return TAB_GetItemW (hwnd, wParam, lParam);
      
    case TCM_SETITEMA:
      return TAB_SetItemA (hwnd, wParam, lParam);
      
    case TCM_SETITEMW:
      return TAB_SetItemW (hwnd, wParam, lParam);
      
    case TCM_DELETEITEM:
      return TAB_DeleteItem (hwnd, wParam, lParam);
      
    case TCM_DELETEALLITEMS:
     return TAB_DeleteAllItems (hwnd, wParam, lParam);
     
    case TCM_GETITEMRECT:
     return TAB_GetItemRect (hwnd, wParam, lParam);
      
    case TCM_GETCURSEL:
      return TAB_GetCurSel (hwnd);
      
    case TCM_HITTEST:
      return TAB_HitTest (hwnd, wParam, lParam);
      
    case TCM_SETCURSEL:
      return TAB_SetCurSel (hwnd, wParam);
      
    case TCM_INSERTITEMA:
      return TAB_InsertItemA (hwnd, wParam, lParam);
      
    case TCM_INSERTITEMW:
      return TAB_InsertItemW (hwnd, wParam, lParam);
      
    case TCM_SETITEMEXTRA:
      FIXME("Unimplemented msg TCM_SETITEMEXTRA\n");
      return 0;
      
    case TCM_ADJUSTRECT:
      return TAB_AdjustRect (hwnd, (BOOL)wParam, (LPRECT)lParam);
      
    case TCM_SETITEMSIZE:
      return TAB_SetItemSize (hwnd, wParam, lParam);
      
    case TCM_REMOVEIMAGE:
      FIXME("Unimplemented msg TCM_REMOVEIMAGE\n");
      return 0;
      
    case TCM_SETPADDING:
      FIXME("Unimplemented msg TCM_SETPADDING\n");
      return 0;
      
    case TCM_GETROWCOUNT:
      return TAB_GetRowCount(hwnd);

    case TCM_GETUNICODEFORMAT:
      return TAB_GetUnicodeFormat (hwnd);

    case TCM_SETUNICODEFORMAT:
      return TAB_SetUnicodeFormat (hwnd, wParam);

    case TCM_HIGHLIGHTITEM:
      FIXME("Unimplemented msg TCM_HIGHLIGHTITEM\n");
      return 0;
      
    case TCM_GETTOOLTIPS:
      return TAB_GetToolTips (hwnd, wParam, lParam);
      
    case TCM_SETTOOLTIPS:
      return TAB_SetToolTips (hwnd, wParam, lParam);
      
    case TCM_GETCURFOCUS:
      return TAB_GetCurFocus (hwnd);
      
    case TCM_SETCURFOCUS:
      return TAB_SetCurFocus (hwnd, wParam);
      
    case TCM_SETMINTABWIDTH:
      FIXME("Unimplemented msg TCM_SETMINTABWIDTH\n");
      return 0;
      
    case TCM_DESELECTALL:
      FIXME("Unimplemented msg TCM_DESELECTALL\n");
      return 0;
      
    case TCM_GETEXTENDEDSTYLE:
      FIXME("Unimplemented msg TCM_GETEXTENDEDSTYLE\n");
      return 0;

    case TCM_SETEXTENDEDSTYLE:
      FIXME("Unimplemented msg TCM_SETEXTENDEDSTYLE\n");
      return 0;

    case WM_GETFONT:
      return TAB_GetFont (hwnd, wParam, lParam);
      
    case WM_SETFONT:
      return TAB_SetFont (hwnd, wParam, lParam);
      
    case WM_CREATE:
      return TAB_Create (hwnd, wParam, lParam);
      
    case WM_NCDESTROY:
      return TAB_Destroy (hwnd, wParam, lParam);
      
    case WM_GETDLGCODE:
      return DLGC_WANTARROWS | DLGC_WANTCHARS;
      
    case WM_LBUTTONDOWN:
      return TAB_LButtonDown (hwnd, wParam, lParam);
      
    case WM_LBUTTONUP:
      return TAB_LButtonUp (hwnd, wParam, lParam);
      
    case WM_RBUTTONDOWN:
      return TAB_RButtonDown (hwnd, wParam, lParam);
      
    case WM_MOUSEMOVE:
      return TAB_MouseMove (hwnd, wParam, lParam);
      
    case WM_ERASEBKGND:
      return TAB_EraseBackground (hwnd, (HDC)wParam);

    case WM_PAINT:
      return TAB_Paint (hwnd, wParam);

    case WM_SIZE:
      return TAB_Size (hwnd, wParam, lParam);
      
    case WM_SETREDRAW:
      return TAB_SetRedraw (hwnd, wParam);

    case WM_HSCROLL:
      return TAB_OnHScroll(hwnd, (int)LOWORD(wParam), (int)HIWORD(wParam), (HWND)lParam);

    case WM_STYLECHANGED:
      TAB_SetItemBounds (hwnd);
      InvalidateRect(hwnd, NULL, TRUE);
      return 0;
      
    case WM_KILLFOCUS:
    case WM_SETFOCUS:
      return TAB_FocusChanging(hwnd, uMsg, wParam, lParam);

    case WM_KEYUP:
      return TAB_KeyUp(hwnd, wParam);
    case WM_NCHITTEST:
      return TAB_NCHitTest(hwnd, lParam);

    default:
      if (uMsg >= WM_USER)
        WARN("unknown msg %04x wp=%08x lp=%08lx\n",
             uMsg, wParam, lParam);
      return DefWindowProcA (hwnd, uMsg, wParam, lParam);
    }

    return 0;
}


VOID
TAB_Register (void)
{
  WNDCLASSA wndClass;

  ZeroMemory (&wndClass, sizeof(WNDCLASSA));
  wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS | CS_HREDRAW | CS_VREDRAW;
  wndClass.lpfnWndProc   = (WNDPROC)TAB_WindowProc;
  wndClass.cbClsExtra    = 0;
  wndClass.cbWndExtra    = sizeof(TAB_INFO *);
  wndClass.hCursor       = LoadCursorA (0, IDC_ARROWA);
  wndClass.hbrBackground = (HBRUSH)NULL;
  wndClass.lpszClassName = WC_TABCONTROLA;
  
  RegisterClassA (&wndClass);
}


VOID
TAB_Unregister (void)
{
    UnregisterClassA (WC_TABCONTROLA, (HINSTANCE)NULL);
}