dlls/comctl32/header.c

   1 /*
   2  *  Header control
   3  *
   4  *  Copyright 1998 Eric Kohl
   5  *  Copyright 2000 Eric Kohl for CodeWeavers
   6  *  Copyright 2003 Maxime Bellenge
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  *
  22  *  TODO:
  23  *   - Imagelist support (partially).
  24  *   - Callback items (under construction).
  25  *   - Hottrack support (partially).
  26  *   - Custom draw support (including Notifications).
  27  *   - Drag and Drop support (including Notifications).
  28  *   - New messages.
  29  *   - Use notification format
  30  *   - Correct the order maintenance code to preserve valid order
  31  *
  32  */
  33
  34 #include <stdarg.h>
  35 #include <string.h>
  36
  37 #include "windef.h"
  38 #include "winbase.h"
  39 #include "wine/unicode.h"
  40 #include "wingdi.h"
  41 #include "winuser.h"
  42 #include "winnls.h"
  43 #include "commctrl.h"
  44 #include "comctl32.h"
  45 #include "imagelist.h"
  46 #include "tmschema.h"
  47 #include "uxtheme.h"
  48 #include "wine/debug.h"
  49
  50 WINE_DEFAULT_DEBUG_CHANNEL(header);
  51
  52 typedef struct
  53 {
  54     INT     cxy;
  55     HBITMAP hbm;
  56     LPWSTR    pszText;
  57     INT     fmt;
  58     LPARAM    lParam;
  59     INT     iImage;
  60     INT     iOrder;             /* see documentation of HD_ITEM */
  61
  62     BOOL    bDown;              /* is item pressed? (used for drawing) */
  63     RECT    rect;               /* bounding rectangle of the item */
  64 } HEADER_ITEM;
  65
  66
  67 typedef struct
  68 {
  69     HWND      hwndNotify;       /* Owner window to send notifications to */
  70     INT       nNotifyFormat;    /* format used for WM_NOTIFY messages */
  71     UINT      uNumItem;         /* number of items (columns) */
  72     INT       nHeight;          /* height of the header (pixels) */
  73     HFONT     hFont;            /* handle to the current font */
  74     HCURSOR   hcurArrow;        /* handle to the arrow cursor */
  75     HCURSOR   hcurDivider;      /* handle to a cursor (used over dividers) <-|-> */
  76     HCURSOR   hcurDivopen;      /* handle to a cursor (used over dividers) <-||-> */
  77     BOOL      bCaptured;        /* Is the mouse captured? */
  78     BOOL      bPressed;         /* Is a header item pressed (down)? */
  79     BOOL      bTracking;        /* Is in tracking mode? */
  80     BOOL      bUnicode;         /* Unicode flag */
  81     INT       iMoveItem;        /* index of tracked item. (Tracking mode) */
  82     INT       xTrackOffset;     /* distance between the right side of the tracked item and the cursor */
  83     INT       xOldTrack;        /* track offset (see above) after the last WM_MOUSEMOVE */
  84     INT       nOldWidth;        /* width of a sizing item after the last WM_MOUSEMOVE */
  85     INT       iHotItem;         /* index of hot item (cursor is over this item) */
  86     INT       iMargin;          /* width of the margin that surrounds a bitmap */
  87
  88     HIMAGELIST  himl;           /* handle to an image list (may be 0) */
  89     HEADER_ITEM *items;         /* pointer to array of HEADER_ITEM's */
  90     INT         *order;         /* array of item IDs indexed by order */
  91     BOOL        bRectsValid;    /* validity flag for bounding rectangles */
  92 } HEADER_INFO;
  93
  94
  95 #define VERT_BORDER     3
  96 #define DIVIDER_WIDTH  10
  97
  98 #define HEADER_GetInfoPtr(hwnd) ((HEADER_INFO *)GetWindowLongPtrW(hwnd,0))
  99
 100 static const WCHAR themeClass[] = {'H','e','a','d','e','r',0};
 101
 102
 103 inline static LRESULT
 104 HEADER_IndexToOrder (HWND hwnd, INT iItem)
 105 {
 106     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 107     HEADER_ITEM *lpItem = &infoPtr->items[iItem];
 108     return lpItem->iOrder;
 109 }
 110
 111
 112 static INT
 113 HEADER_OrderToIndex(HWND hwnd, WPARAM wParam)
 114 {
 115     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 116     INT iorder = (INT)wParam;
 117
 118     if ((iorder <0) || iorder >= infoPtr->uNumItem)
 119       return iorder;
 120     return infoPtr->order[iorder];
 121 }
 122
 123 static void
 124 HEADER_SetItemBounds (HWND hwnd)
 125 {
 126     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 127     HEADER_ITEM *phdi;
 128     RECT rect;
 129     unsigned int i;
 130     int x;
 131
 132     infoPtr->bRectsValid = TRUE;
 133
 134     if (infoPtr->uNumItem == 0)
 135         return;
 136
 137     GetClientRect (hwnd, &rect);
 138
 139     x = rect.left;
 140     for (i = 0; i < infoPtr->uNumItem; i++) {
 141         phdi = &infoPtr->items[HEADER_OrderToIndex(hwnd,i)];
 142         phdi->rect.top = rect.top;
 143         phdi->rect.bottom = rect.bottom;
 144         phdi->rect.left = x;
 145         phdi->rect.right = phdi->rect.left + ((phdi->cxy>0)?phdi->cxy:0);
 146         x = phdi->rect.right;
 147     }
 148 }
 149
 150 static LRESULT
 151 HEADER_Size (HWND hwnd, WPARAM wParam)
 152 {
 153     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 154
 155     infoPtr->bRectsValid = FALSE;
 156
 157     return 0;
 158 }
 159
 160
 161 static INT
 162 HEADER_DrawItem (HWND hwnd, HDC hdc, INT iItem, BOOL bHotTrack)
 163 {
 164     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 165     HEADER_ITEM *phdi = &infoPtr->items[iItem];
 166     RECT r;
 167     INT  oldBkMode, cxEdge = GetSystemMetrics(SM_CXEDGE);
 168     HTHEME theme = GetWindowTheme (hwnd);
 169
 170     TRACE("DrawItem(iItem %d bHotTrack %d unicode flag %d)\n", iItem, bHotTrack, infoPtr->bUnicode);
 171
 172     if (!infoPtr->bRectsValid)
 173         HEADER_SetItemBounds(hwnd);
 174
 175     r = phdi->rect;
 176     if (r.right - r.left == 0)
 177         return phdi->rect.right;
 178
 179     if (theme != NULL) {
 180         int state = (phdi->bDown) ? HIS_PRESSED :
 181             (bHotTrack ? HIS_HOT : HIS_NORMAL);
 182         DrawThemeBackground (theme, hdc, HP_HEADERITEM, state,
 183             &r, NULL);
 184         GetThemeBackgroundContentRect (theme, hdc, HP_HEADERITEM, state,
 185             &r, &r);
 186     }
 187     else {
 188         if (GetWindowLongW (hwnd, GWL_STYLE) & HDS_BUTTONS) {
 189             if (phdi->bDown) {
 190                 DrawEdge (hdc, &r, BDR_RAISEDOUTER,
 191                             BF_RECT | BF_FLAT | BF_MIDDLE | BF_ADJUST);
 192             }
 193             else
 194                 DrawEdge (hdc, &r, EDGE_RAISED,
 195                             BF_RECT | BF_SOFT | BF_MIDDLE | BF_ADJUST);
 196         }
 197         else
 198             DrawEdge (hdc, &r, EDGE_ETCHED, BF_BOTTOM | BF_RIGHT | BF_ADJUST);
 199     }
 200     if (phdi->bDown) {
 201         r.left += 2;
 202         r.top  += 2;
 203     }
 204
 205     r.left  -= cxEdge;
 206     r.right += cxEdge;
 207
 208     if (phdi->fmt & HDF_OWNERDRAW) {
 209         DRAWITEMSTRUCT dis;
 210         NMCUSTOMDRAW nmcd;
 211
 212         nmcd.hdr.hwndFrom = hwnd;
 213         nmcd.hdr.idFrom   = GetWindowLongPtrW (hwnd, GWLP_ID);
 214         nmcd.hdr.code     = NM_CUSTOMDRAW;
 215         nmcd.dwDrawStage  = CDDS_PREPAINT | CDDS_ITEM | CDDS_ITEMPOSTERASE;
 216         nmcd.hdc          = hdc;
 217         nmcd.dwItemSpec   = iItem;
 218         nmcd.rc           = r;
 219         nmcd.uItemState   = phdi->bDown ? CDIS_SELECTED : 0;
 220         nmcd.lItemlParam  = phdi->lParam;
 221
 222         SendMessageW (infoPtr->hwndNotify, WM_NOTIFY,
 223                         (WPARAM)nmcd.hdr.idFrom, (LPARAM)&nmcd);
 224
 225         dis.CtlType    = ODT_HEADER;
 226         dis.CtlID      = GetWindowLongPtrW (hwnd, GWLP_ID);
 227         dis.itemID     = iItem;
 228         dis.itemAction = ODA_DRAWENTIRE;
 229         dis.itemState  = phdi->bDown ? ODS_SELECTED : 0;
 230         dis.hwndItem   = hwnd;
 231         dis.hDC        = hdc;
 232         dis.rcItem     = r;
 233         dis.itemData   = phdi->lParam;
 234         oldBkMode = SetBkMode(hdc, TRANSPARENT);
 235         SendMessageW (infoPtr->hwndNotify, WM_DRAWITEM,
 236                         (WPARAM)dis.CtlID, (LPARAM)&dis);
 237         if (oldBkMode != TRANSPARENT)
 238             SetBkMode(hdc, oldBkMode);
 239     }
 240     else {
 241         UINT rw, rh, /* width and height of r */
 242              *x = NULL, *w = NULL; /* x and width of the pic (bmp or img) which is part of cnt */
 243           /* cnt,txt,img,bmp */
 244         UINT cx, tx, ix, bx,
 245              cw, tw, iw, bw;
 246         BITMAP bmp;
 247
 248         cw = tw = iw = bw = 0;
 249         rw = r.right - r.left;
 250         rh = r.bottom - r.top;
 251
 252         if (phdi->fmt & HDF_STRING) {
 253             RECT textRect;
 254
 255             DrawTextW (hdc, phdi->pszText, -1,
 256                        &textRect, DT_LEFT|DT_VCENTER|DT_SINGLELINE|DT_CALCRECT);
 257             cw = textRect.right - textRect.left + 2 * infoPtr->iMargin;
 258         }
 259
 260         if ((phdi->fmt & HDF_IMAGE) && (infoPtr->himl)) {
 261             iw = infoPtr->himl->cx + 2 * infoPtr->iMargin;
 262             x = &ix;
 263             w = &iw;
 264         }
 265
 266         if ((phdi->fmt & HDF_BITMAP) && (phdi->hbm)) {
 267             GetObjectW (phdi->hbm, sizeof(BITMAP), (LPVOID)&bmp);
 268             bw = bmp.bmWidth + 2 * infoPtr->iMargin;
 269             if (!iw) {
 270                 x = &bx;
 271                 w = &bw;
 272             }
 273         }
 274
 275         if (bw || iw)
 276             cw += *w;
 277
 278         /* align cx using the unclipped cw */
 279         if ((phdi->fmt & HDF_JUSTIFYMASK) == HDF_LEFT)
 280             cx = r.left;
 281         else if ((phdi->fmt & HDF_JUSTIFYMASK) == HDF_CENTER)
 282             cx = r.left + rw / 2 - cw / 2;
 283         else /* HDF_RIGHT */
 284             cx = r.right - cw;
 285
 286         /* clip cx & cw */
 287         if (cx < r.left)
 288             cx = r.left;
 289         if (cx + cw > r.right)
 290             cw = r.right - cx;
 291
 292         tx = cx + infoPtr->iMargin;
 293         /* since cw might have changed we have to recalculate tw */
 294         tw = cw - infoPtr->iMargin * 2;
 295
 296         if (iw || bw) {
 297             tw -= *w;
 298             if (phdi->fmt & HDF_BITMAP_ON_RIGHT) {
 299                 /* put pic behind text */
 300                 *x = cx + tw + infoPtr->iMargin * 3;
 301             } else {
 302                 *x = cx + infoPtr->iMargin;
 303                 /* move text behind pic */
 304                 tx += *w;
 305             }
 306         }
 307
 308         if (iw && bw) {
 309             /* since we're done with the layout we can
 310                now calculate the position of bmp which
 311                has no influence on alignment and layout
 312                because of img */
 313             if ((phdi->fmt & HDF_JUSTIFYMASK) == HDF_RIGHT)
 314                 bx = cx - bw + infoPtr->iMargin;
 315             else
 316                 bx = cx + cw + infoPtr->iMargin;
 317         }
 318
 319         if (iw || bw) {
 320             HDC hClipDC = GetDC(hwnd);
 321             HRGN hClipRgn = CreateRectRgn(r.left, r.top, r.right, r.bottom);
 322             SelectClipRgn(hClipDC, hClipRgn);
 323
 324             if (bw) {
 325                 HDC hdcBitmap = CreateCompatibleDC (hClipDC);
 326                 SelectObject (hdcBitmap, phdi->hbm);
 327                 BitBlt (hClipDC, bx, r.top + ((INT)rh - bmp.bmHeight) / 2,
 328                         bmp.bmWidth, bmp.bmHeight, hdcBitmap, 0, 0, SRCCOPY);
 329                 DeleteDC (hdcBitmap);
 330             }
 331
 332             if (iw) {
 333                 ImageList_DrawEx (infoPtr->himl, phdi->iImage, hClipDC,
 334                                   ix, r.top + ((INT)rh - infoPtr->himl->cy) / 2,
 335                                   infoPtr->himl->cx, infoPtr->himl->cy, CLR_DEFAULT, CLR_DEFAULT, 0);
 336             }
 337
 338             DeleteObject(hClipRgn);
 339             ReleaseDC(hwnd, hClipDC);
 340         }
 341
 342         if (((phdi->fmt & HDF_STRING)
 343                 || (!(phdi->fmt & (HDF_OWNERDRAW|HDF_STRING|HDF_BITMAP|
 344                                    HDF_BITMAP_ON_RIGHT|HDF_IMAGE)))) /* no explicit format specified? */
 345             && (phdi->pszText)) {
 346             oldBkMode = SetBkMode(hdc, TRANSPARENT);
 347             SetTextColor (hdc, (bHotTrack && !theme) ? COLOR_HIGHLIGHT : COLOR_BTNTEXT);
 348             r.left  = tx;
 349             r.right = tx + tw;
 350             DrawTextW (hdc, phdi->pszText, -1,
 351                        &r, DT_LEFT|DT_END_ELLIPSIS|DT_VCENTER|DT_SINGLELINE);
 352             if (oldBkMode != TRANSPARENT)
 353                 SetBkMode(hdc, oldBkMode);
 354         }
 355     }/*Ownerdrawn*/
 356
 357     return phdi->rect.right;
 358 }
 359
 360
 361 static void
 362 HEADER_Refresh (HWND hwnd, HDC hdc)
 363 {
 364     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 365     HFONT hFont, hOldFont;
 366     RECT rect;
 367     HBRUSH hbrBk;
 368     UINT i;
 369     INT x;
 370     HTHEME theme = GetWindowTheme (hwnd);
 371
 372     /* get rect for the bar, adjusted for the border */
 373     GetClientRect (hwnd, &rect);
 374
 375     hFont = infoPtr->hFont ? infoPtr->hFont : GetStockObject (SYSTEM_FONT);
 376     hOldFont = SelectObject (hdc, hFont);
 377
 378     /* draw Background */
 379     if (theme == NULL) {
 380         hbrBk = GetSysColorBrush(COLOR_3DFACE);
 381         FillRect(hdc, &rect, hbrBk);
 382     }
 383
 384     x = rect.left;
 385     for (i = 0; x <= rect.right && i < infoPtr->uNumItem; i++) {
 386         x = HEADER_DrawItem (hwnd, hdc, HEADER_OrderToIndex(hwnd,i),
 387             infoPtr->iHotItem == i);
 388     }
 389
 390     if ((x <= rect.right) && (infoPtr->uNumItem > 0)) {
 391         rect.left = x;
 392         if (theme != NULL) {
 393             DrawThemeBackground (theme, hdc, HP_HEADERITEM, HIS_NORMAL, &rect,
 394                 NULL);
 395         }
 396         else {
 397             if (GetWindowLongW (hwnd, GWL_STYLE) & HDS_BUTTONS)
 398                 DrawEdge (hdc, &rect, EDGE_RAISED, BF_TOP|BF_LEFT|BF_BOTTOM|BF_SOFT);
 399             else
 400                 DrawEdge (hdc, &rect, EDGE_ETCHED, BF_BOTTOM);
 401         }
 402     }
 403
 404     SelectObject (hdc, hOldFont);
 405 }
 406
 407
 408 static void
 409 HEADER_RefreshItem (HWND hwnd, HDC hdc, INT iItem)
 410 {
 411     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 412     HFONT hFont, hOldFont;
 413
 414     hFont = infoPtr->hFont ? infoPtr->hFont : GetStockObject (SYSTEM_FONT);
 415     hOldFont = SelectObject (hdc, hFont);
 416     HEADER_DrawItem (hwnd, hdc, iItem, infoPtr->iHotItem == iItem);
 417     SelectObject (hdc, hOldFont);
 418 }
 419
 420
 421 static void
 422 HEADER_InternalHitTest (HWND hwnd, LPPOINT lpPt, UINT *pFlags, INT *pItem)
 423 {
 424     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 425     RECT rect, rcTest;
 426     UINT iCount;
 427     INT width;
 428     BOOL bNoWidth;
 429
 430     GetClientRect (hwnd, &rect);
 431
 432     *pFlags = 0;
 433     bNoWidth = FALSE;
 434     if (PtInRect (&rect, *lpPt))
 435     {
 436         if (infoPtr->uNumItem == 0) {
 437             *pFlags |= HHT_NOWHERE;
 438             *pItem = 1;
 439             TRACE("NOWHERE\n");
 440             return;
 441         }
 442         else {
 443             /* somewhere inside */
 444             for (iCount = 0; iCount < infoPtr->uNumItem; iCount++) {
 445                 rect = infoPtr->items[iCount].rect;
 446                 width = rect.right - rect.left;
 447                 if (width == 0) {
 448                     bNoWidth = TRUE;
 449                     continue;
 450                 }
 451                 if (PtInRect (&rect, *lpPt)) {
 452                     if (width <= 2 * DIVIDER_WIDTH) {
 453                         *pFlags |= HHT_ONHEADER;
 454                         *pItem = iCount;
 455                         TRACE("ON HEADER %d\n", iCount);
 456                         return;
 457                     }
 458                     if (iCount > 0) {
 459                         rcTest = rect;
 460                         rcTest.right = rcTest.left + DIVIDER_WIDTH;
 461                         if (PtInRect (&rcTest, *lpPt)) {
 462                             if (bNoWidth) {
 463                                 *pFlags |= HHT_ONDIVOPEN;
 464                                 *pItem = iCount - 1;
 465                                 TRACE("ON DIVOPEN %d\n", *pItem);
 466                                 return;
 467                             }
 468                             else {
 469                                 *pFlags |= HHT_ONDIVIDER;
 470                                 *pItem = iCount - 1;
 471                                 TRACE("ON DIVIDER %d\n", *pItem);
 472                                 return;
 473                             }
 474                         }
 475                     }
 476                     rcTest = rect;
 477                     rcTest.left = rcTest.right - DIVIDER_WIDTH;
 478                     if (PtInRect (&rcTest, *lpPt)) {
 479                         *pFlags |= HHT_ONDIVIDER;
 480                         *pItem = iCount;
 481                         TRACE("ON DIVIDER %d\n", *pItem);
 482                         return;
 483                     }
 484
 485                     *pFlags |= HHT_ONHEADER;
 486                     *pItem = iCount;
 487                     TRACE("ON HEADER %d\n", iCount);
 488                     return;
 489                 }
 490             }
 491
 492             /* check for last divider part (on nowhere) */
 493             rect = infoPtr->items[infoPtr->uNumItem-1].rect;
 494             rect.left = rect.right;
 495             rect.right += DIVIDER_WIDTH;
 496             if (PtInRect (&rect, *lpPt)) {
 497                 if (bNoWidth) {
 498                     *pFlags |= HHT_ONDIVOPEN;
 499                     *pItem = infoPtr->uNumItem - 1;
 500                     TRACE("ON DIVOPEN %d\n", *pItem);
 501                     return;
 502                 }
 503                 else {
 504                     *pFlags |= HHT_ONDIVIDER;
 505                     *pItem = infoPtr->uNumItem-1;
 506                     TRACE("ON DIVIDER %d\n", *pItem);
 507                     return;
 508                 }
 509             }
 510
 511             *pFlags |= HHT_NOWHERE;
 512             *pItem = 1;
 513             TRACE("NOWHERE\n");
 514             return;
 515         }
 516     }
 517     else {
 518         if (lpPt->x < rect.left) {
 519            TRACE("TO LEFT\n");
 520            *pFlags |= HHT_TOLEFT;
 521         }
 522         else if (lpPt->x > rect.right) {
 523             TRACE("TO RIGHT\n");
 524             *pFlags |= HHT_TORIGHT;
 525         }
 526
 527         if (lpPt->y < rect.top) {
 528             TRACE("ABOVE\n");
 529             *pFlags |= HHT_ABOVE;
 530         }
 531         else if (lpPt->y > rect.bottom) {
 532             TRACE("BELOW\n");
 533             *pFlags |= HHT_BELOW;
 534         }
 535     }
 536
 537     *pItem = 1;
 538     TRACE("flags=0x%X\n", *pFlags);
 539     return;
 540 }
 541
 542
 543 static void
 544 HEADER_DrawTrackLine (HWND hwnd, HDC hdc, INT x)
 545 {
 546     RECT rect;
 547     HPEN hOldPen;
 548     INT  oldRop;
 549
 550     GetClientRect (hwnd, &rect);
 551
 552     hOldPen = SelectObject (hdc, GetStockObject (BLACK_PEN));
 553     oldRop = SetROP2 (hdc, R2_XORPEN);
 554     MoveToEx (hdc, x, rect.top, NULL);
 555     LineTo (hdc, x, rect.bottom);
 556     SetROP2 (hdc, oldRop);
 557     SelectObject (hdc, hOldPen);
 558 }
 559
 560
 561 static BOOL
 562 HEADER_SendSimpleNotify (HWND hwnd, UINT code)
 563 {
 564     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 565     NMHDR nmhdr;
 566
 567     nmhdr.hwndFrom = hwnd;
 568     nmhdr.idFrom   = GetWindowLongPtrW (hwnd, GWLP_ID);
 569     nmhdr.code     = code;
 570
 571     return (BOOL)SendMessageW (infoPtr->hwndNotify, WM_NOTIFY,
 572                                    (WPARAM)nmhdr.idFrom, (LPARAM)&nmhdr);
 573 }
 574
 575 static BOOL
 576 HEADER_SendHeaderNotify (HWND hwnd, UINT code, INT iItem, INT mask)
 577 {
 578     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 579     NMHEADERA nmhdr;
 580     HDITEMA nmitem;
 581
 582     nmhdr.hdr.hwndFrom = hwnd;
 583     nmhdr.hdr.idFrom   = GetWindowLongPtrW (hwnd, GWLP_ID);
 584     nmhdr.hdr.code = code;
 585     nmhdr.iItem = iItem;
 586     nmhdr.iButton = 0;
 587     nmhdr.pitem = &nmitem;
 588     nmitem.mask = mask;
 589     nmitem.cxy = infoPtr->items[iItem].cxy;
 590     nmitem.hbm = infoPtr->items[iItem].hbm;
 591     nmitem.pszText = NULL;
 592     nmitem.cchTextMax = 0;
 593 /*    nmitem.pszText = infoPtr->items[iItem].pszText; */
 594 /*    nmitem.cchTextMax = infoPtr->items[iItem].cchTextMax; */
 595     nmitem.fmt = infoPtr->items[iItem].fmt;
 596     nmitem.lParam = infoPtr->items[iItem].lParam;
 597     nmitem.iOrder = infoPtr->items[iItem].iOrder;
 598     nmitem.iImage = infoPtr->items[iItem].iImage;
 599
 600     return (BOOL)SendMessageW (infoPtr->hwndNotify, WM_NOTIFY,
 601                                (WPARAM)nmhdr.hdr.idFrom, (LPARAM)&nmhdr);
 602 }
 603
 604
 605 static BOOL
 606 HEADER_SendClickNotify (HWND hwnd, UINT code, INT iItem)
 607 {
 608     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 609     NMHEADERA nmhdr;
 610
 611     nmhdr.hdr.hwndFrom = hwnd;
 612     nmhdr.hdr.idFrom   = GetWindowLongPtrW (hwnd, GWLP_ID);
 613     nmhdr.hdr.code = code;
 614     nmhdr.iItem = iItem;
 615     nmhdr.iButton = 0;
 616     nmhdr.pitem = NULL;
 617
 618     return (BOOL)SendMessageA (infoPtr->hwndNotify, WM_NOTIFY,
 619                                (WPARAM)nmhdr.hdr.idFrom, (LPARAM)&nmhdr);
 620 }
 621
 622
 623 static LRESULT
 624 HEADER_CreateDragImage (HWND hwnd, WPARAM wParam)
 625 {
 626     FIXME("empty stub!\n");
 627     return 0;
 628 }
 629
 630
 631 static LRESULT
 632 HEADER_DeleteItem (HWND hwnd, WPARAM wParam)
 633 {
 634     HEADER_INFO *infoPtr = HEADER_GetInfoPtr(hwnd);
 635     INT iItem = (INT)wParam;
 636
 637     TRACE("[iItem=%d]\n", iItem);
 638
 639     if ((iItem < 0) || (iItem >= (INT)infoPtr->uNumItem))
 640         return FALSE;
 641
 642     if (infoPtr->uNumItem == 1) {
 643         TRACE("Simple delete!\n");
 644         if (infoPtr->items[0].pszText)
 645             Free (infoPtr->items[0].pszText);
 646         Free (infoPtr->items);
 647         Free(infoPtr->order);
 648         infoPtr->items = 0;
 649         infoPtr->order = 0;
 650         infoPtr->uNumItem = 0;
 651     }
 652     else {
 653         HEADER_ITEM *oldItems = infoPtr->items;
 654         INT i;
 655         INT iOrder;
 656         TRACE("Complex delete! [iItem=%d]\n", iItem);
 657
 658         for (i = 0; i < infoPtr->uNumItem; i++)
 659            TRACE("%d: order=%d, iOrder=%d, ->iOrder=%d\n", i, infoPtr->order[i], infoPtr->items[i].iOrder, infoPtr->items[infoPtr->order[i]].iOrder);
 660         if (infoPtr->items[iItem].pszText)
 661             Free (infoPtr->items[iItem].pszText);
 662         iOrder = infoPtr->items[iItem].iOrder;
 663
 664         infoPtr->uNumItem--;
 665         infoPtr->items = Alloc (sizeof (HEADER_ITEM) * infoPtr->uNumItem);
 666         /* pre delete copy */
 667         if (iItem > 0) {
 668             memcpy (&infoPtr->items[0], &oldItems[0],
 669                     iItem * sizeof(HEADER_ITEM));
 670         }
 671
 672         /* post delete copy */
 673         if (iItem < infoPtr->uNumItem) {
 674             memcpy (&infoPtr->items[iItem], &oldItems[iItem+1],
 675                     (infoPtr->uNumItem - iItem) * sizeof(HEADER_ITEM));
 676         }
 677
 678         /* Correct the orders */
 679         if (iOrder < infoPtr->uNumItem)
 680         {
 681             memmove(&infoPtr->order[iOrder], &infoPtr->order[iOrder + 1],
 682                    (infoPtr->uNumItem - iOrder) * sizeof(INT));
 683             for (i = 0; i < infoPtr->uNumItem; i++)
 684             {
 685                 if (infoPtr->order[i] > iItem)
 686                     infoPtr->order[i]--;
 687                 if (i >= iOrder)
 688                     infoPtr->items[infoPtr->order[i]].iOrder = infoPtr->order[i];
 689             }
 690         }
 691
 692         for (i = 0; i < infoPtr->uNumItem; i++)
 693            TRACE("%d: order=%d, iOrder=%d, ->iOrder=%d\n", i, infoPtr->order[i], infoPtr->items[i].iOrder, infoPtr->items[infoPtr->order[i]].iOrder);
 694         Free (oldItems);
 695     }
 696
 697     HEADER_SetItemBounds (hwnd);
 698
 699     InvalidateRect(hwnd, NULL, FALSE);
 700
 701     return TRUE;
 702 }
 703
 704
 705 static LRESULT
 706 HEADER_GetImageList (HWND hwnd)
 707 {
 708     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 709
 710     return (LRESULT)infoPtr->himl;
 711 }
 712
 713
 714 static LRESULT
 715 HEADER_GetItemT (HWND hwnd, INT nItem, LPHDITEMW phdi, BOOL bUnicode)
 716 {
 717     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 718     HEADER_ITEM *lpItem;
 719
 720     if (!phdi)
 721         return FALSE;
 722
 723     TRACE("[nItem=%d]\n", nItem);
 724
 725     if (phdi->mask == 0)
 726         return TRUE;
 727
 728     if ((nItem < 0) || (nItem >= (INT)infoPtr->uNumItem))
 729         lpItem = NULL;
 730     else
 731         lpItem = &infoPtr->items[nItem];
 732
 733     if (phdi->mask & HDI_BITMAP)
 734         phdi->hbm = (lpItem != NULL) ? lpItem->hbm : 0;
 735
 736     if (phdi->mask & HDI_FORMAT)
 737         phdi->fmt = (lpItem != NULL) ? lpItem->fmt : 0;
 738
 739     if (phdi->mask & HDI_WIDTH)
 740         phdi->cxy = (lpItem != NULL) ? lpItem->cxy : 0;
 741
 742     if (phdi->mask & HDI_LPARAM)
 743         phdi->lParam = (lpItem != NULL) ? lpItem->lParam : 0;
 744
 745     if (phdi->mask & HDI_IMAGE)
 746         phdi->iImage = (lpItem != NULL) ? lpItem->iImage : 0;
 747
 748     if (phdi->mask & HDI_ORDER)
 749         phdi->iOrder = (lpItem != NULL) ? lpItem->iOrder : 0;
 750
 751     if (phdi->mask & HDI_TEXT)
 752     {
 753         if (lpItem == NULL)
 754             *phdi->pszText = 0;
 755         else if (lpItem->pszText == LPSTR_TEXTCALLBACKW) /* covers == TEXTCALLBACKA too */
 756             phdi->pszText = LPSTR_TEXTCALLBACKW;
 757         else
 758         {
 759             if (bUnicode)
 760                 Str_GetPtrW (lpItem->pszText, phdi->pszText, phdi->cchTextMax);
 761             else
 762                 Str_GetPtrWtoA (lpItem->pszText, (LPSTR)phdi->pszText, phdi->cchTextMax);
 763         }
 764     }
 765
 766     return TRUE;
 767 }
 768
 769
 770 inline static LRESULT
 771 HEADER_GetItemCount (HWND hwnd)
 772 {
 773     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 774     return infoPtr->uNumItem;
 775 }
 776
 777
 778 static LRESULT
 779 HEADER_GetItemRect (HWND hwnd, WPARAM wParam, LPARAM lParam)
 780 {
 781     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 782     INT iItem = (INT)wParam;
 783     LPRECT lpRect = (LPRECT)lParam;
 784
 785     if ((iItem < 0) || (iItem >= (INT)infoPtr->uNumItem))
 786         return FALSE;
 787
 788     lpRect->left   = infoPtr->items[iItem].rect.left;
 789     lpRect->right  = infoPtr->items[iItem].rect.right;
 790     lpRect->top    = infoPtr->items[iItem].rect.top;
 791     lpRect->bottom = infoPtr->items[iItem].rect.bottom;
 792
 793     return TRUE;
 794 }
 795
 796
 797 static LRESULT
 798 HEADER_GetOrderArray(HWND hwnd, WPARAM wParam, LPARAM lParam)
 799 {
 800     LPINT order = (LPINT) lParam;
 801     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 802
 803     if ((unsigned int)wParam <infoPtr->uNumItem)
 804       return FALSE;
 805
 806     memcpy(order, infoPtr->order, infoPtr->uNumItem * sizeof(INT));
 807     return TRUE;
 808 }
 809
 810 static LRESULT
 811 HEADER_SetOrderArray(HWND hwnd, WPARAM wParam, LPARAM lParam)
 812 {
 813     int i;
 814     LPINT order = (LPINT) lParam;
 815     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 816     HEADER_ITEM *lpItem;
 817
 818     if ((unsigned int)wParam <infoPtr->uNumItem)
 819       return FALSE;
 820     memcpy(infoPtr->order, order, infoPtr->uNumItem * sizeof(INT));
 821     for (i=0; i<(int)wParam; i++)
 822       {
 823         lpItem = &infoPtr->items[*order++];
 824         lpItem->iOrder=i;
 825       }
 826     infoPtr->bRectsValid=0;
 827     InvalidateRect(hwnd, NULL, FALSE);
 828     return TRUE;
 829 }
 830
 831 inline static LRESULT
 832 HEADER_GetUnicodeFormat (HWND hwnd)
 833 {
 834     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 835     return infoPtr->bUnicode;
 836 }
 837
 838
 839 static LRESULT
 840 HEADER_HitTest (HWND hwnd, WPARAM wParam, LPARAM lParam)
 841 {
 842     LPHDHITTESTINFO phti = (LPHDHITTESTINFO)lParam;
 843
 844     HEADER_InternalHitTest (hwnd, &phti->pt, &phti->flags, &phti->iItem);
 845
 846     if (phti->flags == HHT_NOWHERE)
 847         return -1;
 848     else
 849         return phti->iItem;
 850 }
 851
 852
 853 static LRESULT
 854 HEADER_InsertItemT (HWND hwnd, INT nItem, LPHDITEMW phdi, BOOL bUnicode)
 855 {
 856     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 857     HEADER_ITEM *lpItem;
 858     INT       iOrder;
 859     UINT      i;
 860
 861     if ((phdi == NULL) || (nItem < 0))
 862         return -1;
 863
 864     if (nItem > infoPtr->uNumItem)
 865         nItem = infoPtr->uNumItem;
 866
 867     iOrder = (phdi->mask & HDI_ORDER) ? phdi->iOrder : nItem;
 868     if (iOrder < 0)
 869         iOrder = 0;
 870     else if (infoPtr->uNumItem < iOrder)
 871         iOrder = infoPtr->uNumItem;
 872
 873     if (infoPtr->uNumItem == 0) {
 874         infoPtr->items = Alloc (sizeof (HEADER_ITEM));
 875         infoPtr->order = Alloc(sizeof(INT));
 876         infoPtr->uNumItem++;
 877     }
 878     else {
 879         HEADER_ITEM *oldItems = infoPtr->items;
 880         INT *oldOrder = infoPtr->order;
 881
 882         infoPtr->uNumItem++;
 883         infoPtr->items = Alloc (sizeof (HEADER_ITEM) * infoPtr->uNumItem);
 884         if (nItem == 0) {
 885             memcpy (&infoPtr->items[1], &oldItems[0],
 886                     (infoPtr->uNumItem-1) * sizeof(HEADER_ITEM));
 887         }
 888         else
 889         {
 890               /* pre insert copy */
 891             if (nItem > 0) {
 892                  memcpy (&infoPtr->items[0], &oldItems[0],
 893                          nItem * sizeof(HEADER_ITEM));
 894             }
 895
 896             /* post insert copy */
 897             if (nItem < infoPtr->uNumItem - 1) {
 898                 memcpy (&infoPtr->items[nItem+1], &oldItems[nItem],
 899                         (infoPtr->uNumItem - nItem - 1) * sizeof(HEADER_ITEM));
 900             }
 901         }
 902
 903         infoPtr->order = Alloc(sizeof(INT) * infoPtr->uNumItem);
 904         memcpy(infoPtr->order, oldOrder, iOrder * sizeof(INT));
 905         infoPtr->order[iOrder] = nItem;
 906         memcpy(&infoPtr->order[iOrder + 1], &oldOrder[iOrder],
 907                (infoPtr->uNumItem - iOrder - 1) * sizeof(INT));
 908
 909         Free (oldItems);
 910         Free(oldOrder);
 911     }
 912
 913     for (i = 0; i < infoPtr->uNumItem; i++)
 914     {
 915         if (i != iOrder && infoPtr->order[i] >= nItem)
 916             infoPtr->order[i]++;
 917         infoPtr->items[infoPtr->order[i]].iOrder = infoPtr->order[i];
 918     }
 919
 920     lpItem = &infoPtr->items[nItem];
 921     lpItem->bDown = FALSE;
 922
 923     if (phdi->mask & HDI_WIDTH)
 924         lpItem->cxy = phdi->cxy;
 925
 926     if (phdi->mask & HDI_FORMAT)
 927         lpItem->fmt = phdi->fmt;
 928
 929     if (lpItem->fmt == 0)
 930         lpItem->fmt = HDF_LEFT;
 931
 932     if (phdi->mask & HDI_BITMAP)
 933         lpItem->hbm = phdi->hbm;
 934
 935     if (phdi->mask & HDI_LPARAM)
 936         lpItem->lParam = phdi->lParam;
 937
 938     if (phdi->mask & HDI_IMAGE)
 939         lpItem->iImage = phdi->iImage;
 940
 941     if (phdi->mask & HDI_TEXT)
 942     {
 943         if (!phdi->pszText) /* null pointer check */
 944             phdi->pszText = '\0';
 945         if (phdi->pszText != LPSTR_TEXTCALLBACKW) /* covers != TEXTCALLBACKA too */
 946             if (bUnicode)
 947                 Str_SetPtrW(&lpItem->pszText, phdi->pszText);
 948             else
 949                 Str_SetPtrAtoW(&lpItem->pszText, (LPSTR)phdi->pszText);
 950         else
 951             lpItem->pszText = LPSTR_TEXTCALLBACKW;
 952
 953         lpItem->fmt |= HDF_STRING;
 954     }
 955
 956     lpItem->iOrder = iOrder;
 957
 958     HEADER_SetItemBounds (hwnd);
 959
 960     InvalidateRect(hwnd, NULL, FALSE);
 961
 962     return nItem;
 963 }
 964
 965
 966 static LRESULT
 967 HEADER_Layout (HWND hwnd, WPARAM wParam, LPARAM lParam)
 968 {
 969     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 970     LPHDLAYOUT lpLayout = (LPHDLAYOUT)lParam;
 971
 972     lpLayout->pwpos->hwnd = hwnd;
 973     lpLayout->pwpos->hwndInsertAfter = 0;
 974     lpLayout->pwpos->x = lpLayout->prc->left;
 975     lpLayout->pwpos->y = lpLayout->prc->top;
 976     lpLayout->pwpos->cx = lpLayout->prc->right - lpLayout->prc->left;
 977     if (GetWindowLongW (hwnd, GWL_STYLE) & HDS_HIDDEN)
 978         lpLayout->pwpos->cy = 0;
 979     else {
 980         lpLayout->pwpos->cy = infoPtr->nHeight;
 981         lpLayout->prc->top += infoPtr->nHeight;
 982     }
 983     lpLayout->pwpos->flags = SWP_NOZORDER;
 984
 985     TRACE("Layout x=%d y=%d cx=%d cy=%d\n",
 986            lpLayout->pwpos->x, lpLayout->pwpos->y,
 987            lpLayout->pwpos->cx, lpLayout->pwpos->cy);
 988
 989     infoPtr->bRectsValid = FALSE;
 990
 991     return TRUE;
 992 }
 993
 994
 995 static LRESULT
 996 HEADER_SetImageList (HWND hwnd, HIMAGELIST himl)
 997 {
 998     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
 999     HIMAGELIST himlOld;
1000
1001     TRACE("(himl %p)\n", himl);
1002     himlOld = infoPtr->himl;
1003     infoPtr->himl = himl;
1004
1005     /* FIXME: Refresh needed??? */
1006
1007     return (LRESULT)himlOld;
1008 }
1009
1010
1011 static LRESULT
1012 HEADER_GetBitmapMargin(HWND hwnd)
1013 {
1014     HEADER_INFO *infoPtr = HEADER_GetInfoPtr(hwnd);
1015
1016     return infoPtr->iMargin;
1017 }
1018
1019 static LRESULT
1020 HEADER_SetBitmapMargin(HWND hwnd, WPARAM wParam)
1021 {
1022     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1023     INT oldMargin = infoPtr->iMargin;
1024
1025     infoPtr->iMargin = (INT)wParam;
1026
1027     return oldMargin;
1028 }
1029
1030 static LRESULT
1031 HEADER_SetItemT (HWND hwnd, INT nItem, LPHDITEMW phdi, BOOL bUnicode)
1032 {
1033     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1034     HEADER_ITEM *lpItem;
1035
1036     if (phdi == NULL)
1037         return FALSE;
1038     if ((nItem < 0) || (nItem >= (INT)infoPtr->uNumItem))
1039         return FALSE;
1040
1041     TRACE("[nItem=%d]\n", nItem);
1042
1043     if (HEADER_SendHeaderNotify (hwnd, bUnicode ? HDN_ITEMCHANGINGW : HDN_ITEMCHANGINGA,
1044                                  nItem, phdi->mask))
1045         return FALSE;
1046
1047     lpItem = &infoPtr->items[nItem];
1048     if (phdi->mask & HDI_BITMAP)
1049         lpItem->hbm = phdi->hbm;
1050
1051     if (phdi->mask & HDI_FORMAT)
1052         lpItem->fmt = phdi->fmt;
1053
1054     if (phdi->mask & HDI_LPARAM)
1055         lpItem->lParam = phdi->lParam;
1056
1057     if (phdi->mask & HDI_WIDTH)
1058         lpItem->cxy = phdi->cxy;
1059
1060     if (phdi->mask & HDI_IMAGE)
1061         lpItem->iImage = phdi->iImage;
1062
1063     if (phdi->mask & HDI_TEXT)
1064     {
1065         if (phdi->pszText != LPSTR_TEXTCALLBACKW) /* covers != TEXTCALLBACKA too */
1066         {
1067             if (lpItem->pszText)
1068             {
1069                 Free(lpItem->pszText);
1070                 lpItem->pszText = NULL;
1071             }
1072             if (phdi->pszText)
1073             {
1074                 if (bUnicode)
1075                     Str_SetPtrW(&lpItem->pszText, phdi->pszText);
1076                 else
1077                     Str_SetPtrAtoW(&lpItem->pszText, (LPSTR)phdi->pszText);
1078             }
1079         }
1080         else
1081             lpItem->pszText = LPSTR_TEXTCALLBACKW;
1082     }
1083
1084     if (phdi->mask & HDI_ORDER)
1085       {
1086         INT i, nMin, nMax;
1087
1088         if (lpItem->iOrder < phdi->iOrder)
1089         {
1090             memmove(&infoPtr->order[lpItem->iOrder],
1091                    &infoPtr->order[lpItem->iOrder + 1],
1092                    (phdi->iOrder - lpItem->iOrder) * sizeof(INT));
1093         }
1094         if (phdi->iOrder < lpItem->iOrder)
1095         {
1096             memmove(&infoPtr->order[phdi->iOrder + 1],
1097                     &infoPtr->order[phdi->iOrder],
1098                     (lpItem->iOrder - phdi->iOrder) * sizeof(INT));
1099         }
1100         infoPtr->order[phdi->iOrder] = nItem;
1101         nMin = min(lpItem->iOrder, phdi->iOrder);
1102         nMax = max(lpItem->iOrder, phdi->iOrder);
1103         for (i = nMin; i <= nMax; i++)
1104         {
1105             infoPtr->items[infoPtr->order[i]].iOrder = infoPtr->order[i];
1106         }
1107       }
1108
1109     HEADER_SendHeaderNotify (hwnd, bUnicode ? HDN_ITEMCHANGEDW : HDN_ITEMCHANGEDA,
1110                              nItem, phdi->mask);
1111
1112     HEADER_SetItemBounds (hwnd);
1113
1114     InvalidateRect(hwnd, NULL, FALSE);
1115
1116     return TRUE;
1117 }
1118
1119 inline static LRESULT
1120 HEADER_SetUnicodeFormat (HWND hwnd, WPARAM wParam)
1121 {
1122     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1123     BOOL bTemp = infoPtr->bUnicode;
1124
1125     infoPtr->bUnicode = (BOOL)wParam;
1126
1127     return bTemp;
1128 }
1129
1130
1131 static LRESULT
1132 HEADER_Create (HWND hwnd, WPARAM wParam, LPARAM lParam)
1133 {
1134     HEADER_INFO *infoPtr;
1135     TEXTMETRICW tm;
1136     HFONT hOldFont;
1137     HDC   hdc;
1138
1139     infoPtr = (HEADER_INFO *)Alloc (sizeof(HEADER_INFO));
1140     SetWindowLongPtrW (hwnd, 0, (DWORD_PTR)infoPtr);
1141
1142     infoPtr->hwndNotify = ((LPCREATESTRUCTA)lParam)->hwndParent;
1143     infoPtr->uNumItem = 0;
1144     infoPtr->hFont = 0;
1145     infoPtr->items = 0;
1146     infoPtr->order = 0;
1147     infoPtr->bRectsValid = FALSE;
1148     infoPtr->hcurArrow = LoadCursorW (0, (LPWSTR)IDC_ARROW);
1149     infoPtr->hcurDivider = LoadCursorW (COMCTL32_hModule, MAKEINTRESOURCEW(IDC_DIVIDER));
1150     infoPtr->hcurDivopen = LoadCursorW (COMCTL32_hModule, MAKEINTRESOURCEW(IDC_DIVIDEROPEN));
1151     infoPtr->bPressed  = FALSE;
1152     infoPtr->bTracking = FALSE;
1153     infoPtr->iMoveItem = 0;
1154     infoPtr->himl = 0;
1155     infoPtr->iHotItem = -1;
1156     infoPtr->bUnicode = IsWindowUnicode (hwnd);
1157     infoPtr->iMargin = 3*GetSystemMetrics(SM_CXEDGE);
1158     infoPtr->nNotifyFormat =
1159         SendMessageW (infoPtr->hwndNotify, WM_NOTIFYFORMAT, (WPARAM)hwnd, NF_QUERY);
1160
1161     hdc = GetDC (0);
1162     hOldFont = SelectObject (hdc, GetStockObject (SYSTEM_FONT));
1163     GetTextMetricsW (hdc, &tm);
1164     infoPtr->nHeight = tm.tmHeight + VERT_BORDER;
1165     SelectObject (hdc, hOldFont);
1166     ReleaseDC (0, hdc);
1167
1168     OpenThemeData(hwnd, themeClass);
1169
1170     return 0;
1171 }
1172
1173
1174 static LRESULT
1175 HEADER_Destroy (HWND hwnd, WPARAM wParam, LPARAM lParam)
1176 {
1177     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1178     HEADER_ITEM *lpItem;
1179     INT nItem;
1180     HTHEME theme;
1181
1182     if (infoPtr->items) {
1183         lpItem = infoPtr->items;
1184         for (nItem = 0; nItem < infoPtr->uNumItem; nItem++, lpItem++) {
1185             if ((lpItem->pszText) && (lpItem->pszText != LPSTR_TEXTCALLBACKW))
1186                 Free (lpItem->pszText);
1187         }
1188         Free (infoPtr->items);
1189     }
1190
1191     if (infoPtr->order)
1192         Free(infoPtr->order);
1193
1194     if (infoPtr->himl)
1195         ImageList_Destroy (infoPtr->himl);
1196
1197     SetWindowLongPtrW (hwnd, 0, 0);
1198     Free (infoPtr);
1199
1200     theme = GetWindowTheme(hwnd);
1201     CloseThemeData(theme);
1202     return 0;
1203 }
1204
1205
1206 static inline LRESULT
1207 HEADER_GetFont (HWND hwnd)
1208 {
1209     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1210
1211     return (LRESULT)infoPtr->hFont;
1212 }
1213
1214
1215 static LRESULT
1216 HEADER_LButtonDblClk (HWND hwnd, WPARAM wParam, LPARAM lParam)
1217 {
1218     POINT pt;
1219     UINT  flags;
1220     INT   nItem;
1221
1222     pt.x = (INT)LOWORD(lParam);
1223     pt.y = (INT)HIWORD(lParam);
1224     HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);
1225
1226     if ((GetWindowLongW (hwnd, GWL_STYLE) & HDS_BUTTONS) && (flags == HHT_ONHEADER))
1227         HEADER_SendHeaderNotify (hwnd, HDN_ITEMDBLCLICKA, nItem,0);
1228     else if ((flags == HHT_ONDIVIDER) || (flags == HHT_ONDIVOPEN))
1229         HEADER_SendHeaderNotify (hwnd, HDN_DIVIDERDBLCLICKA, nItem,0);
1230
1231     return 0;
1232 }
1233
1234
1235 static LRESULT
1236 HEADER_LButtonDown (HWND hwnd, WPARAM wParam, LPARAM lParam)
1237 {
1238     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1239     DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
1240     POINT pt;
1241     UINT  flags;
1242     INT   nItem;
1243     HDC   hdc;
1244
1245     pt.x = (INT)LOWORD(lParam);
1246     pt.y = (INT)HIWORD(lParam);
1247     HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);
1248
1249     if ((dwStyle & HDS_BUTTONS) && (flags == HHT_ONHEADER)) {
1250         SetCapture (hwnd);
1251         infoPtr->bCaptured = TRUE;
1252         infoPtr->bPressed  = TRUE;
1253         infoPtr->iMoveItem = nItem;
1254
1255         infoPtr->items[nItem].bDown = TRUE;
1256
1257         /* Send WM_CUSTOMDRAW */
1258         hdc = GetDC (hwnd);
1259         HEADER_RefreshItem (hwnd, hdc, nItem);
1260         ReleaseDC (hwnd, hdc);
1261
1262         TRACE("Pressed item %d!\n", nItem);
1263     }
1264     else if ((flags == HHT_ONDIVIDER) || (flags == HHT_ONDIVOPEN)) {
1265         if (!(HEADER_SendHeaderNotify (hwnd, HDN_BEGINTRACKA, nItem,0))) {
1266             SetCapture (hwnd);
1267             infoPtr->bCaptured = TRUE;
1268             infoPtr->bTracking = TRUE;
1269             infoPtr->iMoveItem = nItem;
1270             infoPtr->nOldWidth = infoPtr->items[nItem].cxy;
1271             infoPtr->xTrackOffset = infoPtr->items[nItem].rect.right - pt.x;
1272
1273             if (!(dwStyle & HDS_FULLDRAG)) {
1274                 infoPtr->xOldTrack = infoPtr->items[nItem].rect.right;
1275                 hdc = GetDC (hwnd);
1276                 HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
1277                 ReleaseDC (hwnd, hdc);
1278             }
1279
1280             TRACE("Begin tracking item %d!\n", nItem);
1281         }
1282     }
1283
1284     return 0;
1285 }
1286
1287
1288 static LRESULT
1289 HEADER_LButtonUp (HWND hwnd, WPARAM wParam, LPARAM lParam)
1290 {
1291     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1292     /*
1293      *DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
1294      */
1295     POINT pt;
1296     UINT  flags;
1297     INT   nItem, nWidth;
1298     HDC   hdc;
1299
1300     pt.x = (INT)(SHORT)LOWORD(lParam);
1301     pt.y = (INT)(SHORT)HIWORD(lParam);
1302     HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);
1303
1304     if (infoPtr->bPressed) {
1305         if ((nItem == infoPtr->iMoveItem) && (flags == HHT_ONHEADER)) {
1306             infoPtr->items[infoPtr->iMoveItem].bDown = FALSE;
1307             hdc = GetDC (hwnd);
1308             HEADER_RefreshItem (hwnd, hdc, infoPtr->iMoveItem);
1309             ReleaseDC (hwnd, hdc);
1310
1311             HEADER_SendClickNotify (hwnd, HDN_ITEMCLICKA, infoPtr->iMoveItem);
1312         }
1313         else if (flags == HHT_ONHEADER)
1314           {
1315             HEADER_ITEM *lpItem;
1316             INT newindex = HEADER_IndexToOrder(hwnd,nItem);
1317             INT oldindex = HEADER_IndexToOrder(hwnd,infoPtr->iMoveItem);
1318
1319             TRACE("Exchanging [index:order] [%d:%d] [%d:%d]\n",
1320                   infoPtr->iMoveItem,oldindex,nItem,newindex);
1321             lpItem= &infoPtr->items[nItem];
1322             lpItem->iOrder=oldindex;
1323
1324             lpItem= &infoPtr->items[infoPtr->iMoveItem];
1325             lpItem->iOrder = newindex;
1326
1327             infoPtr->order[oldindex] = nItem;
1328             infoPtr->order[newindex] = infoPtr->iMoveItem;
1329
1330             infoPtr->bRectsValid = FALSE;
1331             InvalidateRect(hwnd, NULL, FALSE);
1332             /* FIXME: Should some WM_NOTIFY be sent */
1333           }
1334
1335         TRACE("Released item %d!\n", infoPtr->iMoveItem);
1336         infoPtr->bPressed = FALSE;
1337     }
1338     else if (infoPtr->bTracking) {
1339         TRACE("End tracking item %d!\n", infoPtr->iMoveItem);
1340         infoPtr->bTracking = FALSE;
1341
1342         HEADER_SendHeaderNotify (hwnd, HDN_ENDTRACKA, infoPtr->iMoveItem,HDI_WIDTH);
1343
1344          /*
1345           * we want to do this even for HDS_FULLDRAG because this is where
1346           * we send the HDN_ITEMCHANGING and HDN_ITEMCHANGED notifications
1347           *
1348           * if (!(dwStyle & HDS_FULLDRAG)) {
1349           */
1350
1351             hdc = GetDC (hwnd);
1352             HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
1353             ReleaseDC (hwnd, hdc);
1354                         if (HEADER_SendHeaderNotify(hwnd, HDN_ITEMCHANGINGA, infoPtr->iMoveItem, HDI_WIDTH))
1355             {
1356                 infoPtr->items[infoPtr->iMoveItem].cxy = infoPtr->nOldWidth;
1357             }
1358             else {
1359                 nWidth = pt.x - infoPtr->items[infoPtr->iMoveItem].rect.left + infoPtr->xTrackOffset;
1360                 if (nWidth < 0)
1361                     nWidth = 0;
1362                 infoPtr->items[infoPtr->iMoveItem].cxy = nWidth;
1363             }
1364
1365             HEADER_SetItemBounds (hwnd);
1366             InvalidateRect(hwnd, NULL, TRUE);
1367             HEADER_SendHeaderNotify(hwnd, HDN_ITEMCHANGEDA, infoPtr->iMoveItem, HDI_WIDTH);
1368        /*
1369         * }
1370         */
1371     }
1372
1373     if (infoPtr->bCaptured) {
1374         infoPtr->bCaptured = FALSE;
1375         ReleaseCapture ();
1376         HEADER_SendSimpleNotify (hwnd, NM_RELEASEDCAPTURE);
1377     }
1378
1379     return 0;
1380 }
1381
1382
1383 static LRESULT
1384 HEADER_NotifyFormat (HWND hwnd, WPARAM wParam, LPARAM lParam)
1385 {
1386     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1387
1388     switch (lParam)
1389     {
1390         case NF_QUERY:
1391             return infoPtr->nNotifyFormat;
1392
1393         case NF_REQUERY:
1394             infoPtr->nNotifyFormat =
1395                 SendMessageW ((HWND)wParam, WM_NOTIFYFORMAT,
1396                               (WPARAM)hwnd, (LPARAM)NF_QUERY);
1397             return infoPtr->nNotifyFormat;
1398     }
1399
1400     return 0;
1401 }
1402
1403
1404 static LRESULT
1405 HEADER_MouseLeave (HWND hwnd, WPARAM wParam, LPARAM lParam)
1406 {
1407     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1408     /* Reset hot-tracked item when mouse leaves control. */
1409     INT oldHotItem = infoPtr->iHotItem;
1410     HDC hdc = GetDC (hwnd);
1411
1412     infoPtr->iHotItem = -1;
1413     if (oldHotItem != -1) HEADER_RefreshItem (hwnd, hdc, oldHotItem);
1414     ReleaseDC (hwnd, hdc);
1415
1416     return 0;
1417 }
1418
1419
1420 static LRESULT
1421 HEADER_MouseMove (HWND hwnd, WPARAM wParam, LPARAM lParam)
1422 {
1423     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1424     DWORD dwStyle = GetWindowLongW (hwnd, GWL_STYLE);
1425     POINT pt;
1426     UINT  flags;
1427     INT   nItem, nWidth;
1428     HDC   hdc;
1429     /* With theming, hottracking is always enabled */
1430     BOOL  hotTrackEnabled =
1431         ((dwStyle & HDS_BUTTONS) && (dwStyle & HDS_HOTTRACK))
1432         || (GetWindowTheme (hwnd) != NULL);
1433     INT oldHotItem = infoPtr->iHotItem;
1434
1435     pt.x = (INT)(SHORT)LOWORD(lParam);
1436     pt.y = (INT)(SHORT)HIWORD(lParam);
1437     HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);
1438
1439     if (hotTrackEnabled) {
1440         if (flags & (HHT_ONHEADER | HHT_ONDIVIDER | HHT_ONDIVOPEN))
1441             infoPtr->iHotItem = nItem;
1442         else
1443             infoPtr->iHotItem = -1;
1444     }
1445
1446     if (infoPtr->bCaptured) {
1447         if (infoPtr->bPressed) {
1448             BOOL oldState = infoPtr->items[infoPtr->iMoveItem].bDown;
1449             if ((nItem == infoPtr->iMoveItem) && (flags == HHT_ONHEADER))
1450                 infoPtr->items[infoPtr->iMoveItem].bDown = TRUE;
1451             else
1452                 infoPtr->items[infoPtr->iMoveItem].bDown = FALSE;
1453             if (oldState != infoPtr->items[infoPtr->iMoveItem].bDown) {
1454                 hdc = GetDC (hwnd);
1455                 HEADER_RefreshItem (hwnd, hdc, infoPtr->iMoveItem);
1456                 ReleaseDC (hwnd, hdc);
1457             }
1458
1459             TRACE("Moving pressed item %d!\n", infoPtr->iMoveItem);
1460         }
1461         else if (infoPtr->bTracking) {
1462             if (dwStyle & HDS_FULLDRAG) {
1463                 if (HEADER_SendHeaderNotify (hwnd, HDN_TRACKA, infoPtr->iMoveItem, HDI_WIDTH))
1464                 {
1465                 nWidth = pt.x - infoPtr->items[infoPtr->iMoveItem].rect.left + infoPtr->xTrackOffset;
1466                 if (nWidth < 0)
1467                   nWidth = 0;
1468                 infoPtr->items[infoPtr->iMoveItem].cxy = nWidth;
1469                         HEADER_SendHeaderNotify(hwnd, HDN_ITEMCHANGEDA, infoPtr->iMoveItem, HDI_WIDTH);
1470                 }
1471                 HEADER_SetItemBounds (hwnd);
1472             }
1473             else {
1474                 hdc = GetDC (hwnd);
1475                 HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
1476                 infoPtr->xOldTrack = pt.x + infoPtr->xTrackOffset;
1477                 if (infoPtr->xOldTrack < infoPtr->items[infoPtr->iMoveItem].rect.left)
1478                     infoPtr->xOldTrack = infoPtr->items[infoPtr->iMoveItem].rect.left;
1479                 infoPtr->items[infoPtr->iMoveItem].cxy =
1480                     infoPtr->xOldTrack - infoPtr->items[infoPtr->iMoveItem].rect.left;
1481                 HEADER_DrawTrackLine (hwnd, hdc, infoPtr->xOldTrack);
1482                 ReleaseDC (hwnd, hdc);
1483             HEADER_SendHeaderNotify (hwnd, HDN_TRACKA, infoPtr->iMoveItem, HDI_WIDTH);
1484             }
1485
1486             TRACE("Tracking item %d!\n", infoPtr->iMoveItem);
1487         }
1488     }
1489
1490     if (hotTrackEnabled) {
1491         TRACKMOUSEEVENT tme;
1492         if (oldHotItem != infoPtr->iHotItem) {
1493             hdc = GetDC (hwnd);
1494             if (oldHotItem != -1) HEADER_RefreshItem (hwnd, hdc, oldHotItem);
1495             if (infoPtr->iHotItem != -1) HEADER_RefreshItem (hwnd, hdc, infoPtr->iHotItem);
1496             ReleaseDC (hwnd, hdc);
1497         }
1498         tme.cbSize = sizeof( tme );
1499         tme.dwFlags = TME_LEAVE;
1500         tme.hwndTrack = hwnd;
1501         TrackMouseEvent( &tme );
1502     }
1503
1504     return 0;
1505 }
1506
1507
1508 static LRESULT
1509 HEADER_Paint (HWND hwnd, WPARAM wParam)
1510 {
1511     HDC hdc;
1512     PAINTSTRUCT ps;
1513
1514     hdc = wParam==0 ? BeginPaint (hwnd, &ps) : (HDC)wParam;
1515     HEADER_Refresh (hwnd, hdc);
1516     if(!wParam)
1517         EndPaint (hwnd, &ps);
1518     return 0;
1519 }
1520
1521
1522 static LRESULT
1523 HEADER_RButtonUp (HWND hwnd, WPARAM wParam, LPARAM lParam)
1524 {
1525     BOOL bRet;
1526     POINT pt;
1527
1528     pt.x = LOWORD(lParam);
1529     pt.y = HIWORD(lParam);
1530
1531     /* Send a Notify message */
1532     bRet = HEADER_SendSimpleNotify (hwnd, NM_RCLICK);
1533
1534     /* Change to screen coordinate for WM_CONTEXTMENU */
1535     ClientToScreen(hwnd, &pt);
1536
1537     /* Send a WM_CONTEXTMENU message in response to the RBUTTONUP */
1538     SendMessageW( hwnd, WM_CONTEXTMENU, (WPARAM) hwnd, MAKELPARAM(pt.x, pt.y));
1539
1540     return bRet;
1541 }
1542
1543
1544 static LRESULT
1545 HEADER_SetCursor (HWND hwnd, WPARAM wParam, LPARAM lParam)
1546 {
1547     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1548     POINT pt;
1549     UINT  flags;
1550     INT   nItem;
1551
1552     TRACE("code=0x%X  id=0x%X\n", LOWORD(lParam), HIWORD(lParam));
1553
1554     GetCursorPos (&pt);
1555     ScreenToClient (hwnd, &pt);
1556
1557     HEADER_InternalHitTest (hwnd, &pt, &flags, &nItem);
1558
1559     if (flags == HHT_ONDIVIDER)
1560         SetCursor (infoPtr->hcurDivider);
1561     else if (flags == HHT_ONDIVOPEN)
1562         SetCursor (infoPtr->hcurDivopen);
1563     else
1564         SetCursor (infoPtr->hcurArrow);
1565
1566     return 0;
1567 }
1568
1569
1570 static LRESULT
1571 HEADER_SetFont (HWND hwnd, WPARAM wParam, LPARAM lParam)
1572 {
1573     HEADER_INFO *infoPtr = HEADER_GetInfoPtr (hwnd);
1574     TEXTMETRICW tm;
1575     HFONT hFont, hOldFont;
1576     HDC hdc;
1577
1578     infoPtr->hFont = (HFONT)wParam;
1579
1580     hFont = infoPtr->hFont ? infoPtr->hFont : GetStockObject (SYSTEM_FONT);
1581
1582     hdc = GetDC (0);
1583     hOldFont = SelectObject (hdc, hFont);
1584     GetTextMetricsW (hdc, &tm);
1585     infoPtr->nHeight = tm.tmHeight + VERT_BORDER;
1586     SelectObject (hdc, hOldFont);
1587     ReleaseDC (0, hdc);
1588
1589     infoPtr->bRectsValid = FALSE;
1590
1591     if (lParam) {
1592         InvalidateRect(hwnd, NULL, FALSE);
1593     }
1594
1595     return 0;
1596 }
1597
1598 /* Update the theme handle after a theme change */
1599 static LRESULT HEADER_ThemeChanged(HWND hwnd)
1600 {
1601     HTHEME theme = GetWindowTheme(hwnd);
1602     CloseThemeData(theme);
1603     OpenThemeData(hwnd, themeClass);
1604     InvalidateRect(hwnd, NULL, FALSE);
1605     return 0;
1606 }
1607
1608
1609 static LRESULT WINAPI
1610 HEADER_WindowProc (HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
1611 {
1612     TRACE("hwnd=%p msg=%x wparam=%x lParam=%lx\n", hwnd, msg, wParam, lParam);
1613     if (!HEADER_GetInfoPtr (hwnd) && (msg != WM_CREATE))
1614         return DefWindowProcW (hwnd, msg, wParam, lParam);
1615     switch (msg) {
1616 /*      case HDM_CLEARFILTER: */
1617
1618         case HDM_CREATEDRAGIMAGE:
1619             return HEADER_CreateDragImage (hwnd, wParam);
1620
1621         case HDM_DELETEITEM:
1622             return HEADER_DeleteItem (hwnd, wParam);
1623
1624 /*      case HDM_EDITFILTER: */
1625
1626         case HDM_GETBITMAPMARGIN:
1627             return HEADER_GetBitmapMargin(hwnd);
1628
1629         case HDM_GETIMAGELIST:
1630             return HEADER_GetImageList (hwnd);
1631
1632         case HDM_GETITEMA:
1633         case HDM_GETITEMW:
1634             return HEADER_GetItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_GETITEMW);
1635
1636         case HDM_GETITEMCOUNT:
1637             return HEADER_GetItemCount (hwnd);
1638
1639         case HDM_GETITEMRECT:
1640             return HEADER_GetItemRect (hwnd, wParam, lParam);
1641
1642         case HDM_GETORDERARRAY:
1643             return HEADER_GetOrderArray(hwnd, wParam, lParam);
1644
1645         case HDM_GETUNICODEFORMAT:
1646             return HEADER_GetUnicodeFormat (hwnd);
1647
1648         case HDM_HITTEST:
1649             return HEADER_HitTest (hwnd, wParam, lParam);
1650
1651         case HDM_INSERTITEMA:
1652         case HDM_INSERTITEMW:
1653             return HEADER_InsertItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_INSERTITEMW);
1654
1655         case HDM_LAYOUT:
1656             return HEADER_Layout (hwnd, wParam, lParam);
1657
1658         case HDM_ORDERTOINDEX:
1659             return HEADER_OrderToIndex(hwnd, wParam);
1660
1661         case HDM_SETBITMAPMARGIN:
1662             return HEADER_SetBitmapMargin(hwnd, wParam);
1663
1664 /*      case HDM_SETFILTERCHANGETIMEOUT: */
1665
1666 /*      case HDM_SETHOTDIVIDER: */
1667
1668         case HDM_SETIMAGELIST:
1669             return HEADER_SetImageList (hwnd, (HIMAGELIST)lParam);
1670
1671         case HDM_SETITEMA:
1672         case HDM_SETITEMW:
1673             return HEADER_SetItemT (hwnd, (INT)wParam, (LPHDITEMW)lParam, msg == HDM_SETITEMW);
1674
1675         case HDM_SETORDERARRAY:
1676             return HEADER_SetOrderArray(hwnd, wParam, lParam);
1677
1678         case HDM_SETUNICODEFORMAT:
1679             return HEADER_SetUnicodeFormat (hwnd, wParam);
1680
1681         case WM_CREATE:
1682             return HEADER_Create (hwnd, wParam, lParam);
1683
1684         case WM_DESTROY:
1685             return HEADER_Destroy (hwnd, wParam, lParam);
1686
1687         case WM_ERASEBKGND:
1688             return 1;
1689
1690         case WM_GETDLGCODE:
1691             return DLGC_WANTTAB | DLGC_WANTARROWS;
1692
1693         case WM_GETFONT:
1694             return HEADER_GetFont (hwnd);
1695
1696         case WM_LBUTTONDBLCLK:
1697             return HEADER_LButtonDblClk (hwnd, wParam, lParam);
1698
1699         case WM_LBUTTONDOWN:
1700             return HEADER_LButtonDown (hwnd, wParam, lParam);
1701
1702         case WM_LBUTTONUP:
1703             return HEADER_LButtonUp (hwnd, wParam, lParam);
1704
1705         case WM_MOUSELEAVE:
1706             return HEADER_MouseLeave (hwnd, wParam, lParam);
1707
1708         case WM_MOUSEMOVE:
1709             return HEADER_MouseMove (hwnd, wParam, lParam);
1710
1711         case WM_NOTIFYFORMAT:
1712             return HEADER_NotifyFormat (hwnd, wParam, lParam);
1713
1714         case WM_SIZE:
1715             return HEADER_Size (hwnd, wParam);
1716
1717         case WM_THEMECHANGED:
1718             return HEADER_ThemeChanged (hwnd);
1719
1720         case WM_PAINT:
1721             return HEADER_Paint (hwnd, wParam);
1722
1723         case WM_RBUTTONUP:
1724             return HEADER_RButtonUp (hwnd, wParam, lParam);
1725
1726         case WM_SETCURSOR:
1727             return HEADER_SetCursor (hwnd, wParam, lParam);
1728
1729         case WM_SETFONT:
1730             return HEADER_SetFont (hwnd, wParam, lParam);
1731
1732         default:
1733             if ((msg >= WM_USER) && (msg < WM_APP))
1734                 ERR("unknown msg %04x wp=%04x lp=%08lx\n",
1735                      msg, wParam, lParam );
1736             return DefWindowProcA (hwnd, msg, wParam, lParam);
1737     }
1738 }
1739
1740
1741 VOID
1742 HEADER_Register (void)
1743 {
1744     WNDCLASSW wndClass;
1745
1746     ZeroMemory (&wndClass, sizeof(WNDCLASSW));
1747     wndClass.style         = CS_GLOBALCLASS | CS_DBLCLKS;
1748     wndClass.lpfnWndProc   = HEADER_WindowProc;
1749     wndClass.cbClsExtra    = 0;
1750     wndClass.cbWndExtra    = sizeof(HEADER_INFO *);
1751     wndClass.hCursor       = LoadCursorW (0, (LPWSTR)IDC_ARROW);
1752     wndClass.lpszClassName = WC_HEADERW;
1753
1754     RegisterClassW (&wndClass);
1755 }
1756
1757
1758 VOID
1759 HEADER_Unregister (void)
1760 {
1761     UnregisterClassW (WC_HEADERW, NULL);
1762 }