controls/combo.c

   1 /*
   2  * Combo controls
   3  *
   4  * Copyright 1997 Alex Korobka
   5  *
   6  * FIXME: roll up in Netscape 3.01.
   7  */
   8
   9 #include <string.h>
  10
  11 #include "winuser.h"
  12 #include "wine/winuser16.h"
  13 #include "sysmetrics.h"
  14 #include "win.h"
  15 #include "spy.h"
  16 #include "user.h"
  17 #include "heap.h"
  18 #include "combo.h"
  19 #include "drive.h"
  20 #include "debug.h"
  21
  22   /* bits in the dwKeyData */
  23 #define KEYDATA_ALT             0x2000
  24 #define KEYDATA_PREVSTATE       0x4000
  25
  26 /*
  27  * Additional combo box definitions
  28  */
  29
  30 #define CB_GETPTR( wnd )      (*(LPHEADCOMBO*)((wnd)->wExtra))
  31 #define CB_NOTIFY( lphc, code ) \
  32         (SendMessageA( (lphc)->owner, WM_COMMAND, \
  33                          MAKEWPARAM((lphc)->self->wIDmenu, (code)), (lphc)->self->hwndSelf))
  34 #define CB_GETEDITTEXTLENGTH( lphc ) \
  35         (SendMessageA( (lphc)->hWndEdit, WM_GETTEXTLENGTH, 0, 0 ))
  36
  37 static HBITMAP  hComboBmp = 0;
  38 static UINT             CBitHeight, CBitWidth;
  39 static UINT             CBitOffset = 8;
  40
  41 /***********************************************************************
  42  *           COMBO_Init
  43  *
  44  * Load combo button bitmap.
  45  */
  46 static BOOL COMBO_Init()
  47 {
  48   HDC           hDC;
  49
  50   if( hComboBmp ) return TRUE;
  51   if( (hDC = CreateCompatibleDC(0)) )
  52   {
  53     BOOL        bRet = FALSE;
  54     if( (hComboBmp = LoadBitmapA(0, MAKEINTRESOURCEA(OBM_COMBO))) )
  55     {
  56       BITMAP      bm;
  57       HBITMAP     hPrevB;
  58       RECT        r;
  59
  60       GetObjectA( hComboBmp, sizeof(bm), &bm );
  61       CBitHeight = bm.bmHeight;
  62       CBitWidth  = bm.bmWidth;
  63
  64       TRACE(combo, "combo bitmap [%i,%i]\n", CBitWidth, CBitHeight );
  65
  66       hPrevB = SelectObject16( hDC, hComboBmp);
  67       SetRect( &r, 0, 0, CBitWidth, CBitHeight );
  68       InvertRect( hDC, &r );
  69       SelectObject( hDC, hPrevB );
  70       bRet = TRUE;
  71     }
  72     DeleteDC( hDC );
  73     return bRet;
  74   }
  75   return FALSE;
  76 }
  77
  78 /***********************************************************************
  79  *           COMBO_NCCreate
  80  */
  81 static LRESULT COMBO_NCCreate(WND* wnd, LPARAM lParam)
  82 {
  83    LPHEADCOMBO          lphc;
  84
  85    if ( wnd && COMBO_Init() &&
  86       (lphc = HeapAlloc(GetProcessHeap(), 0, sizeof(HEADCOMBO))) )
  87    {
  88         LPCREATESTRUCTA     lpcs = (CREATESTRUCTA*)lParam;
  89
  90         memset( lphc, 0, sizeof(HEADCOMBO) );
  91        *(LPHEADCOMBO*)wnd->wExtra = lphc;
  92
  93        /* some braindead apps do try to use scrollbar/border flags */
  94
  95         lphc->dwStyle = (lpcs->style & ~(WS_BORDER | WS_HSCROLL | WS_VSCROLL));
  96         wnd->dwStyle &= ~(WS_BORDER | WS_HSCROLL | WS_VSCROLL);
  97
  98         if( !(lpcs->style & (CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE)) )
  99               lphc->dwStyle |= CBS_HASSTRINGS;
 100         if( !(wnd->dwExStyle & WS_EX_NOPARENTNOTIFY) )
 101               lphc->wState |= CBF_NOTIFY;
 102
 103         TRACE(combo, "[0x%08x], style = %08x\n",
 104                      (UINT)lphc, lphc->dwStyle );
 105
 106         return (LRESULT)(UINT)wnd->hwndSelf;
 107     }
 108     return (LRESULT)FALSE;
 109 }
 110
 111 /***********************************************************************
 112  *           COMBO_NCDestroy
 113  */
 114 static LRESULT COMBO_NCDestroy( LPHEADCOMBO lphc )
 115 {
 116
 117    if( lphc )
 118    {
 119        WND*             wnd = lphc->self;
 120
 121        TRACE(combo,"[%04x]: freeing storage\n", CB_HWND(lphc));
 122
 123        if( (CB_GETTYPE(lphc) != CBS_SIMPLE) && lphc->hWndLBox )
 124            DestroyWindow( lphc->hWndLBox );
 125
 126        HeapFree( GetProcessHeap(), 0, lphc );
 127        wnd->wExtra[0] = 0;
 128    }
 129    return 0;
 130 }
 131
 132 /***********************************************************************
 133  *           CBGetDefaultTextHeight
 134  */
 135 static void CBGetDefaultTextHeight( LPHEADCOMBO lphc, LPSIZE lpSize )
 136 {
 137    if( lphc->editHeight ) /* explicitly set height */
 138        lpSize->cy = lphc->editHeight;
 139    else
 140    {
 141        HDC    hDC = GetDC( lphc->self->hwndSelf );
 142        HFONT  hPrevFont = 0;
 143
 144        if( lphc->hFont ) hPrevFont = SelectObject( hDC, lphc->hFont );
 145
 146        GetTextExtentPoint32A( hDC, "0", 1, lpSize);
 147
 148        lpSize->cy += lpSize->cy / 4 + 4 * SYSMETRICS_CYBORDER;
 149
 150        if( hPrevFont ) SelectObject( hDC, hPrevFont );
 151        ReleaseDC( lphc->self->hwndSelf, hDC );
 152    }
 153    lpSize->cx = lphc->RectCombo.right - lphc->RectCombo.left;
 154 }
 155
 156
 157 /***********************************************************************
 158  *           CBCalcPlacement
 159  *
 160  * Set up component coordinates given valid lphc->RectCombo.
 161  */
 162 static void CBCalcPlacement( LPHEADCOMBO lphc, LPRECT lprEdit,
 163                              LPRECT lprButton, LPRECT lprLB )
 164 {
 165    RECT rect = lphc->RectCombo;
 166    SIZE size;
 167
 168    /* get combo height and width */
 169
 170    if( CB_OWNERDRAWN(lphc) )
 171    {
 172        UINT     u = lphc->RectEdit.bottom - lphc->RectEdit.top;
 173
 174        if( lphc->wState & CBF_MEASUREITEM ) /* first initialization */
 175        {
 176            MEASUREITEMSTRUCT        mi32;
 177
 178            /* calculate defaults before sending WM_MEASUREITEM */
 179
 180            CBGetDefaultTextHeight( lphc, &size );
 181
 182            lphc->wState &= ~CBF_MEASUREITEM;
 183
 184            mi32.CtlType = ODT_COMBOBOX;
 185            mi32.CtlID   = lphc->self->wIDmenu;
 186            mi32.itemID  = -1;
 187            mi32.itemWidth  = size.cx;
 188            mi32.itemHeight = size.cy - 6; /* ownerdrawn cb is taller */
 189            mi32.itemData   = 0;
 190            SendMessageA(lphc->owner, WM_MEASUREITEM,
 191                                 (WPARAM)mi32.CtlID, (LPARAM)&mi32);
 192            u = 6 + (UINT16)mi32.itemHeight;
 193        }
 194        else
 195            size.cx = rect.right - rect.left;
 196        size.cy = u;
 197    }
 198    else
 199        CBGetDefaultTextHeight( lphc, &size );
 200
 201    /* calculate text and button placement */
 202
 203    lprEdit->left = lprEdit->top = lprButton->top = 0;
 204    if( CB_GETTYPE(lphc) == CBS_SIMPLE )         /* no button */
 205        lprButton->left = lprButton->right = lprButton->bottom = 0;
 206    else
 207    {
 208        INT      i = size.cx - CBitWidth - 10;   /* seems ok */
 209
 210        lprButton->right = size.cx;
 211        lprButton->left = (INT16)i;
 212        lprButton->bottom = lprButton->top + size.cy;
 213
 214        if( i < 0 ) size.cx = 0;
 215        else size.cx = i;
 216    }
 217
 218    if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
 219    {
 220        size.cx -= CBitOffset;
 221        if( size.cx < 0 ) size.cx = 0;
 222    }
 223
 224    lprEdit->right = size.cx; lprEdit->bottom = size.cy;
 225
 226    /* listbox placement */
 227
 228    lprLB->left = ( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST ) ? 0 : CBitOffset;
 229    lprLB->top = lprEdit->bottom - SYSMETRICS_CYBORDER;
 230    lprLB->right = rect.right - rect.left;
 231    lprLB->bottom = rect.bottom - rect.top;
 232
 233    if( lphc->droppedWidth > (lprLB->right - lprLB->left) )
 234        lprLB->right = lprLB->left + lphc->droppedWidth;
 235
 236    TRACE(combo,"[%04x]: (%i,%i-%i,%i) placement\n",
 237                 CB_HWND(lphc), lphc->RectCombo.left, lphc->RectCombo.top,
 238                 lphc->RectCombo.right, lphc->RectCombo.bottom);
 239
 240    TRACE(combo,"\ttext\t= (%i,%i-%i,%i)\n",
 241                 lprEdit->left, lprEdit->top, lprEdit->right, lprEdit->bottom);
 242
 243    TRACE(combo,"\tbutton\t= (%i,%i-%i,%i)\n",
 244                 lprButton->left, lprButton->top, lprButton->right, lprButton->bottom);
 245
 246    TRACE(combo,"\tlbox\t= (%i,%i-%i,%i)\n",
 247                 lprLB->left, lprLB->top, lprLB->right, lprLB->bottom );
 248 }
 249
 250 /***********************************************************************
 251  *           CBGetDroppedControlRect32
 252  */
 253 static void CBGetDroppedControlRect( LPHEADCOMBO lphc, LPRECT lpRect)
 254 {
 255    lpRect->left = lphc->RectCombo.left +
 256                       (lphc->wState & CBF_EDIT) ? CBitOffset : 0;
 257    lpRect->top = lphc->RectCombo.top + lphc->RectEdit.bottom -
 258                                              SYSMETRICS_CYBORDER;
 259    lpRect->right = lphc->RectCombo.right;
 260    lpRect->bottom = lphc->RectCombo.bottom - SYSMETRICS_CYBORDER;
 261 }
 262
 263 /***********************************************************************
 264  *           COMBO_Create
 265  */
 266 static LRESULT COMBO_Create( LPHEADCOMBO lphc, WND* wnd, LPARAM lParam)
 267 {
 268   static char clbName[] = "ComboLBox";
 269   static char editName[] = "Edit";
 270
 271   LPCREATESTRUCTA  lpcs = (CREATESTRUCTA*)lParam;
 272
 273   if( !CB_GETTYPE(lphc) ) lphc->dwStyle |= CBS_SIMPLE;
 274   else if( CB_GETTYPE(lphc) != CBS_DROPDOWNLIST ) lphc->wState |= CBF_EDIT;
 275
 276   lphc->self  = wnd;
 277   lphc->owner = lpcs->hwndParent;
 278
 279   /* M$ IE 3.01 actually creates (and rapidly destroys) an ownerless combobox */
 280
 281   if( lphc->owner || !(lpcs->style & WS_VISIBLE) )
 282   {
 283       UINT      lbeStyle;
 284       RECT      editRect, btnRect, lbRect;
 285
 286       GetWindowRect( wnd->hwndSelf, &lphc->RectCombo );
 287
 288       lphc->wState |= CBF_MEASUREITEM;
 289       CBCalcPlacement( lphc, &editRect, &btnRect, &lbRect );
 290       lphc->RectButton = btnRect;
 291       lphc->droppedWidth = lphc->editHeight = 0;
 292
 293       /* create listbox popup */
 294
 295       lbeStyle = (LBS_NOTIFY | WS_BORDER | WS_CLIPSIBLINGS) |
 296                  (lpcs->style & (WS_VSCROLL | CBS_OWNERDRAWFIXED | CBS_OWNERDRAWVARIABLE));
 297
 298       if( lphc->dwStyle & CBS_SORT )
 299         lbeStyle |= LBS_SORT;
 300       if( lphc->dwStyle & CBS_HASSTRINGS )
 301         lbeStyle |= LBS_HASSTRINGS;
 302       if( lphc->dwStyle & CBS_NOINTEGRALHEIGHT )
 303         lbeStyle |= LBS_NOINTEGRALHEIGHT;
 304       if( lphc->dwStyle & CBS_DISABLENOSCROLL )
 305         lbeStyle |= LBS_DISABLENOSCROLL;
 306
 307       if( CB_GETTYPE(lphc) == CBS_SIMPLE )      /* child listbox */
 308         lbeStyle |= WS_CHILD | WS_VISIBLE;
 309       else                                      /* popup listbox */
 310       {
 311         lbeStyle |= WS_POPUP;
 312         OffsetRect( &lbRect, lphc->RectCombo.left, lphc->RectCombo.top );
 313       }
 314
 315      /* Dropdown ComboLBox is not a child window and we cannot pass
 316       * ID_CB_LISTBOX directly because it will be treated as a menu handle.
 317       */
 318
 319       lphc->hWndLBox = CreateWindowExA( 0, clbName, NULL, lbeStyle,
 320                         lbRect.left + SYSMETRICS_CXBORDER,
 321                         lbRect.top + SYSMETRICS_CYBORDER,
 322                         lbRect.right - lbRect.left - 2 * SYSMETRICS_CXBORDER,
 323                         lbRect.bottom - lbRect.top - 2 * SYSMETRICS_CYBORDER,
 324                         lphc->self->hwndSelf,
 325                        (lphc->dwStyle & CBS_DROPDOWN)? (HMENU)0 : (HMENU)ID_CB_LISTBOX,
 326                         lphc->self->hInstance, (LPVOID)lphc );
 327       if( lphc->hWndLBox )
 328       {
 329           BOOL  bEdit = TRUE;
 330           lbeStyle = WS_CHILD | WS_VISIBLE | WS_BORDER | ES_NOHIDESEL | ES_LEFT;
 331           if( lphc->wState & CBF_EDIT )
 332           {
 333               if( lphc->dwStyle & CBS_OEMCONVERT )
 334                   lbeStyle |= ES_OEMCONVERT;
 335               if( lphc->dwStyle & CBS_AUTOHSCROLL )
 336                   lbeStyle |= ES_AUTOHSCROLL;
 337               if( lphc->dwStyle & CBS_LOWERCASE )
 338                   lbeStyle |= ES_LOWERCASE;
 339               else if( lphc->dwStyle & CBS_UPPERCASE )
 340                   lbeStyle |= ES_UPPERCASE;
 341               lphc->hWndEdit = CreateWindowExA( 0, editName, NULL, lbeStyle,
 342                         editRect.left, editRect.top, editRect.right - editRect.left,
 343                         editRect.bottom - editRect.top, lphc->self->hwndSelf,
 344                         (HMENU)ID_CB_EDIT, lphc->self->hInstance, NULL );
 345               if( !lphc->hWndEdit ) bEdit = FALSE;
 346           }
 347
 348           if( bEdit )
 349           {
 350               lphc->RectEdit = editRect;
 351               if( CB_GETTYPE(lphc) != CBS_SIMPLE )
 352               {
 353                 lphc->wState |= CBF_NORESIZE;
 354                 SetWindowPos( wnd->hwndSelf, 0, 0, 0,
 355                                 lphc->RectCombo.right - lphc->RectCombo.left,
 356                                 lphc->RectEdit.bottom - lphc->RectEdit.top,
 357                                 SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE );
 358                 lphc->wState &= ~CBF_NORESIZE;
 359               }
 360               TRACE(combo,"init done\n");
 361               return wnd->hwndSelf;
 362           }
 363           ERR(combo, "edit control failure.\n");
 364       } else ERR(combo, "listbox failure.\n");
 365   } else ERR(combo, "no owner for visible combo.\n");
 366
 367   /* CreateWindow() will send WM_NCDESTROY to cleanup */
 368
 369   return -1;
 370 }
 371
 372 /***********************************************************************
 373  *           CBPaintButton
 374  *
 375  * Paint combo button (normal, pressed, and disabled states).
 376  */
 377 static void CBPaintButton(LPHEADCOMBO lphc, HDC hdc)
 378 {
 379     RECT        r;
 380     UINT        x, y;
 381     BOOL        bBool;
 382     HDC       hMemDC;
 383     HBRUSH    hPrevBrush;
 384     COLORREF    oldTextColor, oldBkColor;
 385
 386     if( lphc->wState & CBF_NOREDRAW ) return;
 387
 388     hPrevBrush = SelectObject(hdc, GetSysColorBrush(COLOR_BTNFACE));
 389     CONV_RECT16TO32( &lphc->RectButton, &r );
 390
 391     Rectangle(hdc, r.left, r.top, r.right, r.bottom );
 392     if( (bBool = lphc->wState & CBF_BUTTONDOWN) )
 393     {
 394         DrawEdge( hdc, &r, EDGE_SUNKEN, BF_RECT );
 395         OffsetRect( &r, 1, 1 );
 396     } else {
 397         r.top++, r.left++;
 398         DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 399         r.top--, r.left--;
 400     }
 401
 402     InflateRect( &r, -1, -1 );
 403
 404     x = (r.left + r.right - CBitWidth) >> 1;
 405     y = (r.top + r.bottom - CBitHeight) >> 1;
 406
 407     InflateRect( &r, -3, -3 );
 408
 409     hMemDC = CreateCompatibleDC( hdc );
 410     SelectObject( hMemDC, hComboBmp );
 411     oldTextColor = SetTextColor( hdc, GetSysColor(COLOR_BTNFACE) );
 412     oldBkColor = SetBkColor( hdc, CB_DISABLED(lphc) ? RGB(128,128,128) :
 413                                RGB(0,0,0) );
 414     BitBlt( hdc, x, y, 8, 8, hMemDC, 0, 0, SRCCOPY );
 415     SetBkColor( hdc, oldBkColor );
 416     SetTextColor( hdc, oldTextColor );
 417     DeleteDC( hMemDC );
 418     SelectObject( hdc, hPrevBrush );
 419 }
 420
 421 /***********************************************************************
 422  *           CBPaintText
 423  *
 424  * Paint CBS_DROPDOWNLIST text field / update edit control contents.
 425  */
 426 static void CBPaintText(LPHEADCOMBO lphc, HDC hdc)
 427 {
 428    INT  id, size = 0;
 429    LPSTR        pText = NULL;
 430
 431    if( lphc->wState & CBF_NOREDRAW ) return;
 432
 433    /* follow Windows combobox that sends a bunch of text
 434     * inquiries to its listbox while processing WM_PAINT. */
 435
 436    if( (id = SendMessageA(lphc->hWndLBox, LB_GETCURSEL, 0, 0) ) != LB_ERR )
 437    {
 438         size = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, id, 0);
 439         if( (pText = HeapAlloc( GetProcessHeap(), 0, size + 1)) )
 440         {
 441             SendMessageA( lphc->hWndLBox, LB_GETTEXT, (WPARAM)id, (LPARAM)pText );
 442             pText[size] = '\0'; /* just in case */
 443         } else return;
 444    }
 445
 446    if( lphc->wState & CBF_EDIT )
 447    {
 448         if( CB_HASSTRINGS(lphc) ) SetWindowTextA( lphc->hWndEdit, pText ? pText : "" );
 449         if( lphc->wState & CBF_FOCUSED )
 450             SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1));
 451    }
 452    else /* paint text field ourselves */
 453    {
 454         HBRUSH hPrevBrush = 0;
 455         HDC      hDC = hdc;
 456
 457         if( !hDC )
 458         {
 459             if ((hDC = GetDC(lphc->self->hwndSelf)))
 460             {
 461                 HBRUSH hBrush = SendMessageA( lphc->owner,
 462                                                   WM_CTLCOLORLISTBOX,
 463                                                   hDC, lphc->self->hwndSelf );
 464                 hPrevBrush = SelectObject( hDC,
 465                            (hBrush) ? hBrush : GetStockObject(WHITE_BRUSH) );
 466             }
 467         }
 468         if( hDC )
 469         {
 470             RECT        rect;
 471             UINT        itemState;
 472             HFONT       hPrevFont = (lphc->hFont) ? SelectObject(hDC, lphc->hFont) : 0;
 473
 474             PatBlt( hDC, (rect.left = lphc->RectEdit.left + SYSMETRICS_CXBORDER),
 475                            (rect.top = lphc->RectEdit.top + SYSMETRICS_CYBORDER),
 476                            (rect.right = lphc->RectEdit.right - SYSMETRICS_CXBORDER),
 477                            (rect.bottom = lphc->RectEdit.bottom - SYSMETRICS_CYBORDER) - 1, PATCOPY );
 478             InflateRect( &rect, -1, -1 );
 479
 480             if( lphc->wState & CBF_FOCUSED &&
 481                 !(lphc->wState & CBF_DROPPED) )
 482             {
 483                 /* highlight */
 484
 485                 FillRect( hDC, &rect, GetSysColorBrush(COLOR_HIGHLIGHT) );
 486                 SetBkColor( hDC, GetSysColor( COLOR_HIGHLIGHT ) );
 487                 SetTextColor( hDC, GetSysColor( COLOR_HIGHLIGHTTEXT ) );
 488                 itemState = ODS_SELECTED | ODS_FOCUS;
 489             } else itemState = 0;
 490
 491             if( CB_OWNERDRAWN(lphc) )
 492             {
 493                 DRAWITEMSTRUCT dis;
 494
 495                 if( lphc->self->dwStyle & WS_DISABLED ) itemState |= ODS_DISABLED;
 496
 497                 dis.CtlType     = ODT_COMBOBOX;
 498                 dis.CtlID       = lphc->self->wIDmenu;
 499                 dis.hwndItem    = lphc->self->hwndSelf;
 500                 dis.itemAction  = ODA_DRAWENTIRE;
 501                 dis.itemID      = id;
 502                 dis.itemState   = itemState;
 503                 dis.hDC         = hDC;
 504                 dis.rcItem      = rect;
 505                 dis.itemData    = SendMessageA( lphc->hWndLBox, LB_GETITEMDATA,
 506                                                                   (WPARAM)id, 0 );
 507                 SendMessageA( lphc->owner, WM_DRAWITEM,
 508                                 lphc->self->wIDmenu, (LPARAM)&dis );
 509             }
 510             else
 511             {
 512                 ExtTextOutA( hDC, rect.left + 1, rect.top + 1,
 513                                ETO_OPAQUE | ETO_CLIPPED, &rect,
 514                                pText ? pText : "" , size, NULL );
 515                 if(lphc->wState & CBF_FOCUSED && !(lphc->wState & CBF_DROPPED))
 516                     DrawFocusRect( hDC, &rect );
 517             }
 518
 519             if( hPrevFont ) SelectObject(hDC, hPrevFont );
 520             if( !hdc )
 521             {
 522                 if( hPrevBrush ) SelectObject( hDC, hPrevBrush );
 523                 ReleaseDC( lphc->self->hwndSelf, hDC );
 524             }
 525         }
 526    }
 527    if (pText)
 528         HeapFree( GetProcessHeap(), 0, pText );
 529 }
 530
 531 /***********************************************************************
 532  *           COMBO_Paint
 533  */
 534 static LRESULT COMBO_Paint(LPHEADCOMBO lphc, HDC hParamDC)
 535 {
 536   PAINTSTRUCT ps;
 537   HDC   hDC;
 538
 539   hDC = (hParamDC) ? hParamDC
 540                    : BeginPaint( lphc->self->hwndSelf, &ps);
 541   if( hDC && !(lphc->wState & CBF_NOREDRAW) )
 542   {
 543       HBRUSH    hPrevBrush, hBkgBrush;
 544
 545       hBkgBrush = SendMessageA( lphc->owner, WM_CTLCOLORLISTBOX,
 546                                   hDC, lphc->self->hwndSelf );
 547       if( !hBkgBrush ) hBkgBrush = GetStockObject(WHITE_BRUSH);
 548
 549       hPrevBrush = SelectObject( hDC, hBkgBrush );
 550       if( !IsRectEmpty(&lphc->RectButton) )
 551       {
 552           /* paint everything to the right of the text field */
 553
 554           PatBlt( hDC, lphc->RectEdit.right, lphc->RectEdit.top,
 555                          lphc->RectButton.right - lphc->RectEdit.right,
 556                          lphc->RectEdit.bottom - lphc->RectEdit.top, PATCOPY );
 557           CBPaintButton( lphc, hDC );
 558       }
 559
 560       if( !(lphc->wState & CBF_EDIT) )
 561       {
 562           /* paint text field */
 563
 564           HPEN hPrevPen = SelectObject( hDC, GetSysColorPen(
 565                                                           COLOR_WINDOWFRAME) );
 566
 567           Rectangle( hDC, lphc->RectEdit.left, lphc->RectEdit.top,
 568                        lphc->RectEdit.right, lphc->RectButton.bottom );
 569           SelectObject( hDC, hPrevPen );
 570           CBPaintText( lphc, hDC );
 571       }
 572       if( hPrevBrush ) SelectObject( hDC, hPrevBrush );
 573   }
 574   if( !hParamDC ) EndPaint(lphc->self->hwndSelf, &ps);
 575   return 0;
 576 }
 577
 578 /***********************************************************************
 579  *           CBUpdateLBox
 580  *
 581  * Select listbox entry according to the contents of the edit control.
 582  */
 583 static INT CBUpdateLBox( LPHEADCOMBO lphc )
 584 {
 585    INT  length, idx, ret;
 586    LPSTR        pText = NULL;
 587
 588    idx = ret = LB_ERR;
 589    length = CB_GETEDITTEXTLENGTH( lphc );
 590
 591    if( length > 0 )
 592        pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1);
 593
 594    TRACE(combo,"\t edit text length %i\n", length );
 595
 596    if( pText )
 597    {
 598        if( length ) GetWindowTextA( lphc->hWndEdit, pText, length + 1);
 599        else pText[0] = '\0';
 600        idx = SendMessageA( lphc->hWndLBox, LB_FINDSTRING,
 601                              (WPARAM)(-1), (LPARAM)pText );
 602        if( idx == LB_ERR ) idx = 0;     /* select first item */
 603        else ret = idx;
 604        HeapFree( GetProcessHeap(), 0, pText );
 605    }
 606
 607    /* select entry */
 608
 609    SendMessageA( lphc->hWndLBox, LB_SETCURSEL, (WPARAM)idx, 0 );
 610
 611    if( idx >= 0 )
 612    {
 613        SendMessageA( lphc->hWndLBox, LB_SETTOPINDEX, (WPARAM)idx, 0 );
 614        /* probably superfluous but Windows sends this too */
 615        SendMessageA( lphc->hWndLBox, LB_SETCARETINDEX, (WPARAM)idx, 0 );
 616    }
 617    return ret;
 618 }
 619
 620 /***********************************************************************
 621  *           CBUpdateEdit
 622  *
 623  * Copy a listbox entry to the edit control.
 624  */
 625 static void CBUpdateEdit( LPHEADCOMBO lphc , INT index )
 626 {
 627    INT  length;
 628    LPSTR        pText = NULL;
 629
 630    TRACE(combo,"\t %i\n", index );
 631
 632    if( index == -1 )
 633    {
 634        length = CB_GETEDITTEXTLENGTH( lphc );
 635        if( length )
 636        {
 637            if( (pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1)) )
 638            {
 639                 GetWindowTextA( lphc->hWndEdit, pText, length + 1 );
 640                 index = SendMessageA( lphc->hWndLBox, LB_FINDSTRING,
 641                                         (WPARAM)(-1), (LPARAM)pText );
 642                 HeapFree( GetProcessHeap(), 0, pText );
 643            }
 644        }
 645    }
 646
 647    if( index >= 0 ) /* got an entry */
 648    {
 649        length = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, (WPARAM)index, 0);
 650        if( length )
 651        {
 652            if( (pText = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1)) )
 653            {
 654                 SendMessageA( lphc->hWndLBox, LB_GETTEXT,
 655                                 (WPARAM)index, (LPARAM)pText );
 656                 SendMessageA( lphc->hWndEdit, WM_SETTEXT, 0, (LPARAM)pText );
 657                 SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1) );
 658                 HeapFree( GetProcessHeap(), 0, pText );
 659            }
 660        }
 661    }
 662 }
 663
 664 /***********************************************************************
 665  *           CBDropDown
 666  *
 667  * Show listbox popup.
 668  */
 669 static void CBDropDown( LPHEADCOMBO lphc )
 670 {
 671    INT  index;
 672    RECT rect;
 673    LPRECT       pRect = NULL;
 674
 675    TRACE(combo,"[%04x]: drop down\n", CB_HWND(lphc));
 676
 677    CB_NOTIFY( lphc, CBN_DROPDOWN );
 678
 679    /* set selection */
 680
 681    lphc->wState |= CBF_DROPPED;
 682    if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
 683    {
 684        index = CBUpdateLBox( lphc );
 685        if( !(lphc->wState & CBF_CAPTURE) ) CBUpdateEdit( lphc, index );
 686    }
 687    else
 688    {
 689        index = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
 690        if( index == LB_ERR ) index = 0;
 691        SendMessageA( lphc->hWndLBox, LB_SETTOPINDEX, (WPARAM)index, 0 );
 692        SendMessageA( lphc->hWndLBox, LB_CARETON, 0, 0 );
 693        pRect = &lphc->RectEdit;
 694    }
 695
 696    /* now set popup position */
 697
 698    GetWindowRect( lphc->self->hwndSelf, &rect );
 699
 700    rect.top += lphc->RectEdit.bottom - lphc->RectEdit.top - SYSMETRICS_CYBORDER;
 701    rect.bottom = rect.top + lphc->RectCombo.bottom -
 702                             lphc->RectCombo.top - SYSMETRICS_CYBORDER;
 703    rect.right = rect.left + lphc->RectCombo.right - lphc->RectCombo.left;
 704    rect.left += ( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST ) ? 0 : CBitOffset;
 705
 706    SetWindowPos( lphc->hWndLBox, HWND_TOP, rect.left, rect.top,
 707                  rect.right - rect.left, rect.bottom - rect.top,
 708                  SWP_NOACTIVATE | SWP_NOSIZE | SWP_NOREDRAW);
 709
 710    if( !(lphc->wState & CBF_NOREDRAW) )
 711        if( pRect )
 712            RedrawWindow( lphc->self->hwndSelf, pRect, 0, RDW_INVALIDATE |
 713                            RDW_ERASE | RDW_UPDATENOW | RDW_NOCHILDREN );
 714    ShowWindow( lphc->hWndLBox, SW_SHOWNA );
 715 }
 716
 717 /***********************************************************************
 718  *           CBRollUp
 719  *
 720  * Hide listbox popup.
 721  */
 722 static void CBRollUp( LPHEADCOMBO lphc, BOOL ok, BOOL bButton )
 723 {
 724    HWND hWnd = lphc->self->hwndSelf;
 725
 726    CB_NOTIFY( lphc, (ok) ? CBN_SELENDOK : CBN_SELENDCANCEL );
 727
 728    if( IsWindow( hWnd ) && CB_GETTYPE(lphc) != CBS_SIMPLE )
 729    {
 730
 731        TRACE(combo,"[%04x]: roll up [%i]\n", CB_HWND(lphc), (INT)ok );
 732
 733        /* always send WM_LBUTTONUP? */
 734        SendMessageA( lphc->hWndLBox, WM_LBUTTONUP, 0, (LPARAM)(-1) );
 735
 736        if( lphc->wState & CBF_DROPPED )
 737        {
 738            RECT rect;
 739
 740            lphc->wState &= ~CBF_DROPPED;
 741            ShowWindow( lphc->hWndLBox, SW_HIDE );
 742
 743            if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
 744            {
 745                INT index = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
 746                CBUpdateEdit( lphc, index );
 747                rect = lphc->RectButton;
 748            }
 749            else
 750            {
 751                if( bButton )
 752                    UnionRect( &rect, &lphc->RectButton,
 753                                        &lphc->RectEdit );
 754                else
 755                    rect = lphc->RectEdit;
 756                bButton = TRUE;
 757            }
 758
 759            if( bButton && !(lphc->wState & CBF_NOREDRAW) )
 760                RedrawWindow( hWnd, &rect, 0, RDW_INVALIDATE |
 761                                RDW_ERASE | RDW_UPDATENOW | RDW_NOCHILDREN );
 762            CB_NOTIFY( lphc, CBN_CLOSEUP );
 763        }
 764    }
 765 }
 766
 767 /***********************************************************************
 768  *           COMBO_FlipListbox
 769  *
 770  * Used by the ComboLBox to show/hide itself in response to VK_F4, etc...
 771  */
 772 BOOL COMBO_FlipListbox( LPHEADCOMBO lphc, BOOL bRedrawButton )
 773 {
 774    if( lphc->wState & CBF_DROPPED )
 775    {
 776        CBRollUp( lphc, TRUE, bRedrawButton );
 777        return FALSE;
 778    }
 779
 780    CBDropDown( lphc );
 781    return TRUE;
 782 }
 783
 784 /***********************************************************************
 785  *           COMBO_GetLBWindow
 786  *
 787  * Edit control helper.
 788  */
 789 HWND COMBO_GetLBWindow( WND* pWnd )
 790 {
 791   LPHEADCOMBO       lphc = CB_GETPTR(pWnd);
 792   if( lphc ) return lphc->hWndLBox;
 793   return 0;
 794 }
 795
 796
 797 /***********************************************************************
 798  *           CBRepaintButton
 799  */
 800 static void CBRepaintButton( LPHEADCOMBO lphc )
 801 {
 802    HDC        hDC = GetDC( lphc->self->hwndSelf );
 803
 804    if( hDC )
 805    {
 806        CBPaintButton( lphc, hDC );
 807        ReleaseDC( lphc->self->hwndSelf, hDC );
 808    }
 809 }
 810
 811 /***********************************************************************
 812  *           COMBO_SetFocus
 813  */
 814 static void COMBO_SetFocus( LPHEADCOMBO lphc )
 815 {
 816    if( !(lphc->wState & CBF_FOCUSED) )
 817    {
 818        if( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST )
 819            SendMessageA( lphc->hWndLBox, LB_CARETON, 0, 0 );
 820
 821        if( lphc->wState & CBF_EDIT )
 822            SendMessageA( lphc->hWndEdit, EM_SETSEL, 0, (LPARAM)(-1) );
 823        lphc->wState |= CBF_FOCUSED;
 824        if( !(lphc->wState & CBF_EDIT) ) CBPaintText( lphc, 0 );
 825
 826        CB_NOTIFY( lphc, CBN_SETFOCUS );
 827    }
 828 }
 829
 830 /***********************************************************************
 831  *           COMBO_KillFocus
 832  */
 833 static void COMBO_KillFocus( LPHEADCOMBO lphc )
 834 {
 835    HWND hWnd = lphc->self->hwndSelf;
 836
 837    if( lphc->wState & CBF_FOCUSED )
 838    {
 839        SendMessageA( hWnd, WM_LBUTTONUP, 0, (LPARAM)(-1) );
 840
 841        CBRollUp( lphc, FALSE, TRUE );
 842        if( IsWindow( hWnd ) )
 843        {
 844            if( CB_GETTYPE(lphc) == CBS_DROPDOWNLIST )
 845                SendMessageA( lphc->hWndLBox, LB_CARETOFF, 0, 0 );
 846
 847            lphc->wState &= ~CBF_FOCUSED;
 848
 849            /* redraw text */
 850            if( lphc->wState & CBF_EDIT )
 851                SendMessageA( lphc->hWndEdit, EM_SETSEL, (WPARAM)(-1), 0 );
 852            else CBPaintText( lphc, 0 );
 853
 854            CB_NOTIFY( lphc, CBN_KILLFOCUS );
 855        }
 856    }
 857 }
 858
 859 /***********************************************************************
 860  *           COMBO_Command
 861  */
 862 static LRESULT COMBO_Command( LPHEADCOMBO lphc, WPARAM wParam, HWND hWnd )
 863 {
 864    if( lphc->wState & CBF_EDIT && lphc->hWndEdit == hWnd )
 865    {
 866        /* ">> 8" makes gcc generate jump-table instead of cmp ladder */
 867
 868        switch( HIWORD(wParam) >> 8 )
 869        {
 870            case (EN_SETFOCUS >> 8):
 871
 872                 TRACE(combo,"[%04x]: edit [%04x] got focus\n",
 873                              CB_HWND(lphc), lphc->hWndEdit );
 874
 875                 if( !(lphc->wState & CBF_FOCUSED) ) COMBO_SetFocus( lphc );
 876                 break;
 877
 878            case (EN_KILLFOCUS >> 8):
 879
 880                 TRACE(combo,"[%04x]: edit [%04x] lost focus\n",
 881                              CB_HWND(lphc), lphc->hWndEdit );
 882
 883                 /* NOTE: it seems that Windows' edit control sends an
 884                  * undocumented message WM_USER + 0x1B instead of this
 885                  * notification (only when it happens to be a part of
 886                  * the combo). ?? - AK.
 887                  */
 888
 889                 COMBO_KillFocus( lphc );
 890                 break;
 891
 892
 893            case (EN_CHANGE >> 8):
 894                 CB_NOTIFY( lphc, CBN_EDITCHANGE );
 895                 CBUpdateLBox( lphc );
 896                 break;
 897
 898            case (EN_UPDATE >> 8):
 899                 CB_NOTIFY( lphc, CBN_EDITUPDATE );
 900                 break;
 901
 902            case (EN_ERRSPACE >> 8):
 903                 CB_NOTIFY( lphc, CBN_ERRSPACE );
 904        }
 905    }
 906    else if( lphc->hWndLBox == hWnd )
 907    {
 908        switch( HIWORD(wParam) )
 909        {
 910            case LBN_ERRSPACE:
 911                 CB_NOTIFY( lphc, CBN_ERRSPACE );
 912                 break;
 913
 914            case LBN_DBLCLK:
 915                 CB_NOTIFY( lphc, CBN_DBLCLK );
 916                 break;
 917
 918            case LBN_SELCHANGE:
 919            case LBN_SELCANCEL:
 920
 921                 TRACE(combo,"[%04x]: lbox selection change [%04x]\n",
 922                              CB_HWND(lphc), lphc->wState );
 923
 924                 /* do not roll up if selection is being tracked
 925                  * by arrowkeys in the dropdown listbox */
 926
 927                 if( (lphc->wState & CBF_DROPPED) && !(lphc->wState & CBF_NOROLLUP) )
 928                      CBRollUp( lphc, (HIWORD(wParam) == LBN_SELCHANGE), TRUE );
 929                 else lphc->wState &= ~CBF_NOROLLUP;
 930
 931                 CB_NOTIFY( lphc, CBN_SELCHANGE );
 932                 CBPaintText( lphc, 0 );
 933                 /* fall through */
 934
 935            case LBN_SETFOCUS:
 936            case LBN_KILLFOCUS:
 937                 /* nothing to do here since ComboLBox always resets the focus to its
 938                  * combo/edit counterpart */
 939                  break;
 940        }
 941    }
 942    return 0;
 943 }
 944
 945 /***********************************************************************
 946  *           COMBO_ItemOp
 947  *
 948  * Fixup an ownerdrawn item operation and pass it up to the combobox owner.
 949  */
 950 static LRESULT COMBO_ItemOp( LPHEADCOMBO lphc, UINT msg,
 951                                WPARAM wParam, LPARAM lParam )
 952 {
 953    HWND hWnd = lphc->self->hwndSelf;
 954
 955    TRACE(combo,"[%04x]: ownerdraw op %04x\n", CB_HWND(lphc), msg );
 956
 957 #define lpIS    ((LPDELETEITEMSTRUCT)lParam)
 958
 959    /* two first items are the same in all 4 structs */
 960    lpIS->CtlType = ODT_COMBOBOX;
 961    lpIS->CtlID   = lphc->self->wIDmenu;
 962
 963    switch( msg )        /* patch window handle */
 964    {
 965         case WM_DELETEITEM:
 966              lpIS->hwndItem = hWnd;
 967 #undef  lpIS
 968              break;
 969         case WM_DRAWITEM:
 970 #define lpIS    ((LPDRAWITEMSTRUCT)lParam)
 971              lpIS->hwndItem = hWnd;
 972 #undef  lpIS
 973              break;
 974         case WM_COMPAREITEM:
 975 #define lpIS    ((LPCOMPAREITEMSTRUCT)lParam)
 976              lpIS->hwndItem = hWnd;
 977 #undef  lpIS
 978              break;
 979    }
 980
 981    return SendMessageA( lphc->owner, msg, lphc->self->wIDmenu, lParam );
 982 }
 983
 984 /***********************************************************************
 985  *           COMBO_GetText
 986  */
 987 static LRESULT COMBO_GetText( LPHEADCOMBO lphc, UINT N, LPSTR lpText)
 988 {
 989    if( lphc->wState & CBF_EDIT )
 990        return SendMessageA( lphc->hWndEdit, WM_GETTEXT,
 991                              (WPARAM)N, (LPARAM)lpText );
 992
 993    /* get it from the listbox */
 994
 995    if( lphc->hWndLBox )
 996    {
 997        INT idx = SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0 );
 998        if( idx != LB_ERR )
 999        {
1000            LPSTR        lpBuffer;
1001            INT  length = SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN,
1002                                                 (WPARAM)idx, 0 );
1003
1004            /* 'length' is without the terminating character */
1005            if( length >= N )
1006                lpBuffer = (LPSTR) HeapAlloc( GetProcessHeap(), 0, length + 1 );
1007            else
1008                lpBuffer = lpText;
1009
1010            if( lpBuffer )
1011            {
1012                INT    n = SendMessageA( lphc->hWndLBox, LB_GETTEXT,
1013                                            (WPARAM)idx, (LPARAM)lpBuffer );
1014
1015                /* truncate if buffer is too short */
1016
1017                if( length >= N )
1018                {
1019                    if (N && lpText) {
1020                    if( n != LB_ERR ) memcpy( lpText, lpBuffer, (N>n) ? n+1 : N-1 );
1021                    lpText[N - 1] = '\0';
1022                    }
1023                    HeapFree( GetProcessHeap(), 0, lpBuffer );
1024                }
1025                return (LRESULT)n;
1026            }
1027        }
1028    }
1029    return 0;
1030 }
1031
1032
1033 /***********************************************************************
1034  *           CBResetPos
1035  *
1036  * This function sets window positions according to the updated
1037  * component placement struct.
1038  */
1039 static void CBResetPos( LPHEADCOMBO lphc, LPRECT lbRect, BOOL bRedraw )
1040 {
1041    BOOL bDrop = (CB_GETTYPE(lphc) != CBS_SIMPLE);
1042
1043    /* NOTE: logs sometimes have WM_LBUTTONUP before a cascade of
1044     * sizing messages */
1045
1046    if( lphc->wState & CBF_EDIT )
1047        SetWindowPos( lphc->hWndEdit, 0, lphc->RectEdit.left, lphc->RectEdit.top,
1048                        lphc->RectEdit.right - lphc->RectEdit.left,
1049                        lphc->RectEdit.bottom - lphc->RectEdit.top,
1050                        SWP_NOZORDER | SWP_NOACTIVATE | ((bDrop) ? SWP_NOREDRAW : 0) );
1051
1052    if( bDrop )
1053        OffsetRect( lbRect, lphc->RectCombo.left, lphc->RectCombo.top );
1054
1055    lbRect->right -= lbRect->left;       /* convert to width */
1056    lbRect->bottom -= lbRect->top;
1057    SetWindowPos( lphc->hWndLBox, 0, lbRect->left, lbRect->top,
1058                    lbRect->right, lbRect->bottom,
1059                    SWP_NOACTIVATE | SWP_NOZORDER | ((bDrop) ? SWP_NOREDRAW : 0) );
1060
1061    if( bDrop )
1062    {
1063        if( lphc->wState & CBF_DROPPED )
1064        {
1065            lphc->wState &= ~CBF_DROPPED;
1066            ShowWindow( lphc->hWndLBox, SW_HIDE );
1067        }
1068
1069        lphc->wState |= CBF_NORESIZE;
1070        SetWindowPos( lphc->self->hwndSelf, 0, 0, 0,
1071                        lphc->RectCombo.right - lphc->RectCombo.left,
1072                        lphc->RectEdit.bottom - lphc->RectEdit.top,
1073                        SWP_NOMOVE | SWP_NOZORDER | SWP_NOACTIVATE | SWP_NOREDRAW );
1074        lphc->wState &= ~CBF_NORESIZE;
1075
1076        if( bRedraw && !(lphc->wState & CBF_NOREDRAW) )
1077            RedrawWindow( lphc->self->hwndSelf, NULL, 0,
1078                            RDW_INVALIDATE | RDW_ERASE | RDW_UPDATENOW );
1079    }
1080 }
1081
1082
1083 /***********************************************************************
1084  *           COMBO_Size
1085  */
1086 static void COMBO_Size( LPHEADCOMBO lphc )
1087 {
1088   RECT  rect;
1089   INT           w, h;
1090
1091   GetWindowRect( lphc->self->hwndSelf, &rect );
1092   w = rect.right - rect.left; h = rect.bottom - rect.top;
1093
1094   TRACE(combo,"w = %i, h = %i\n", w, h );
1095
1096   /* CreateWindow() may send a bogus WM_SIZE, ignore it */
1097
1098   if( w == (lphc->RectCombo.right - lphc->RectCombo.left) )
1099   {
1100       if( (CB_GETTYPE(lphc) == CBS_SIMPLE) &&
1101           (h == (lphc->RectCombo.bottom - lphc->RectCombo.top)) )
1102           return;
1103       else if( (lphc->dwStyle & CBS_DROPDOWN) &&
1104                (h == (lphc->RectEdit.bottom - lphc->RectEdit.top))  )
1105                return;
1106   }
1107   lphc->RectCombo = rect;
1108   CBCalcPlacement( lphc, &lphc->RectEdit, &lphc->RectButton, &rect );
1109   CBResetPos( lphc, &rect, TRUE );
1110 }
1111
1112
1113 /***********************************************************************
1114  *           COMBO_Font
1115  */
1116 static void COMBO_Font( LPHEADCOMBO lphc, HFONT hFont, BOOL bRedraw )
1117 {
1118   RECT        rect;
1119
1120   lphc->hFont = hFont;
1121
1122   if( lphc->wState & CBF_EDIT )
1123       SendMessageA( lphc->hWndEdit, WM_SETFONT, (WPARAM)hFont, bRedraw );
1124   SendMessageA( lphc->hWndLBox, WM_SETFONT, (WPARAM)hFont, bRedraw );
1125
1126   GetWindowRect( lphc->self->hwndSelf, &rect );
1127   OffsetRect( &lphc->RectCombo, rect.left - lphc->RectCombo.left,
1128                                   rect.top - lphc->RectCombo.top );
1129   CBCalcPlacement( lphc, &lphc->RectEdit,
1130                          &lphc->RectButton, &rect );
1131   CBResetPos( lphc, &rect, bRedraw );
1132 }
1133
1134
1135 /***********************************************************************
1136  *           COMBO_SetItemHeight
1137  */
1138 static LRESULT COMBO_SetItemHeight( LPHEADCOMBO lphc, INT index, INT height )
1139 {
1140    LRESULT      lRet = CB_ERR;
1141
1142    if( index == -1 ) /* set text field height */
1143    {
1144        if( height < 32768 )
1145        {
1146            RECT rect;
1147
1148            lphc->editHeight = height;
1149            GetWindowRect( lphc->self->hwndSelf, &rect );
1150            OffsetRect( &lphc->RectCombo, rect.left - lphc->RectCombo.left,
1151                                            rect.top - lphc->RectCombo.top );
1152            CBCalcPlacement( lphc, &lphc->RectEdit,
1153                                   &lphc->RectButton, &rect );
1154            CBResetPos( lphc, &rect, TRUE );
1155            lRet = height;
1156        }
1157    }
1158    else if ( CB_OWNERDRAWN(lphc) )      /* set listbox item height */
1159         lRet = SendMessageA( lphc->hWndLBox, LB_SETITEMHEIGHT,
1160                               (WPARAM)index, (LPARAM)height );
1161    return lRet;
1162 }
1163
1164 /***********************************************************************
1165  *           COMBO_SelectString
1166  */
1167 static LRESULT COMBO_SelectString( LPHEADCOMBO lphc, INT start, LPCSTR pText )
1168 {
1169    INT index = SendMessageA( lphc->hWndLBox, LB_SELECTSTRING,
1170                                  (WPARAM)start, (LPARAM)pText );
1171    if( index >= 0 )
1172    {
1173         if( lphc->wState & CBF_EDIT )
1174             CBUpdateEdit( lphc, index );
1175         else
1176             CBPaintText( lphc, 0 );
1177    }
1178    return (LRESULT)index;
1179 }
1180
1181 /***********************************************************************
1182  *           COMBO_LButtonDown
1183  */
1184 static void COMBO_LButtonDown( LPHEADCOMBO lphc, LPARAM lParam )
1185 {
1186    POINT     pt = { LOWORD(lParam), HIWORD(lParam) };
1187    BOOL      bButton = PtInRect(&lphc->RectButton, pt);
1188    HWND      hWnd = lphc->self->hwndSelf;
1189
1190    if( (CB_GETTYPE(lphc) == CBS_DROPDOWNLIST) ||
1191        (bButton && (CB_GETTYPE(lphc) == CBS_DROPDOWN)) )
1192    {
1193        lphc->wState |= CBF_BUTTONDOWN;
1194        if( lphc->wState & CBF_DROPPED )
1195        {
1196            /* got a click to cancel selection */
1197
1198            CBRollUp( lphc, TRUE, FALSE );
1199            if( !IsWindow( hWnd ) ) return;
1200
1201            if( lphc->wState & CBF_CAPTURE )
1202            {
1203                lphc->wState &= ~CBF_CAPTURE;
1204                ReleaseCapture();
1205            }
1206            lphc->wState &= ~CBF_BUTTONDOWN;
1207        }
1208        else
1209        {
1210            /* drop down the listbox and start tracking */
1211
1212            lphc->wState |= CBF_CAPTURE;
1213            CBDropDown( lphc );
1214            SetCapture( hWnd );
1215        }
1216        if( bButton ) CBRepaintButton( lphc );
1217    }
1218 }
1219
1220 /***********************************************************************
1221  *           COMBO_LButtonUp
1222  *
1223  * Release capture and stop tracking if needed.
1224  */
1225 static void COMBO_LButtonUp( LPHEADCOMBO lphc, LPARAM lParam )
1226 {
1227    if( lphc->wState & CBF_CAPTURE )
1228    {
1229        lphc->wState &= ~CBF_CAPTURE;
1230        if( CB_GETTYPE(lphc) == CBS_DROPDOWN )
1231        {
1232            INT index = CBUpdateLBox( lphc );
1233            CBUpdateEdit( lphc, index );
1234        }
1235        ReleaseCapture();
1236    }
1237
1238    if( lphc->wState & CBF_BUTTONDOWN )
1239    {
1240        lphc->wState &= ~CBF_BUTTONDOWN;
1241        CBRepaintButton( lphc );
1242    }
1243 }
1244
1245 /***********************************************************************
1246  *           COMBO_MouseMove
1247  *
1248  * Two things to do - track combo button and release capture when
1249  * pointer goes into the listbox.
1250  */
1251 static void COMBO_MouseMove( LPHEADCOMBO lphc, WPARAM wParam, LPARAM lParam )
1252 {
1253    POINT  pt = { LOWORD(lParam), HIWORD(lParam) };
1254    RECT   lbRect;
1255
1256    if( lphc->wState & CBF_BUTTONDOWN )
1257    {
1258        BOOL     bButton = PtInRect(&lphc->RectButton, pt);
1259
1260        if( !bButton )
1261        {
1262            lphc->wState &= ~CBF_BUTTONDOWN;
1263            CBRepaintButton( lphc );
1264        }
1265    }
1266
1267    GetClientRect( lphc->hWndLBox, &lbRect );
1268    MapWindowPoints( lphc->self->hwndSelf, lphc->hWndLBox, &pt, 1 );
1269    if( PtInRect(&lbRect, pt) )
1270    {
1271        lphc->wState &= ~CBF_CAPTURE;
1272        ReleaseCapture();
1273        if( CB_GETTYPE(lphc) == CBS_DROPDOWN ) CBUpdateLBox( lphc );
1274
1275        /* hand over pointer tracking */
1276        SendMessageA( lphc->hWndLBox, WM_LBUTTONDOWN, wParam, lParam );
1277    }
1278 }
1279
1280
1281 /***********************************************************************
1282  *           ComboWndProc
1283  *
1284  * http://www.microsoft.com/msdn/sdk/platforms/doc/sdk/win32/ctrl/src/combobox_15.htm
1285  */
1286 LRESULT WINAPI ComboWndProc( HWND hwnd, UINT message,
1287                              WPARAM wParam, LPARAM lParam )
1288 {
1289     WND*        pWnd = WIN_FindWndPtr(hwnd);
1290
1291     if( pWnd )
1292     {
1293       LPHEADCOMBO       lphc = CB_GETPTR(pWnd);
1294
1295       TRACE(combo, "[%04x]: msg %s wp %08x lp %08lx\n",
1296                    pWnd->hwndSelf, SPY_GetMsgName(message), wParam, lParam );
1297
1298       if( lphc || message == WM_NCCREATE )
1299       switch(message)
1300       {
1301
1302         /* System messages */
1303
1304         case WM_NCCREATE:
1305                 return COMBO_NCCreate(pWnd, lParam);
1306
1307         case WM_NCDESTROY:
1308                 COMBO_NCDestroy(lphc);
1309                 break;
1310
1311         case WM_CREATE:
1312                 return COMBO_Create(lphc, pWnd, lParam);
1313
1314         case WM_PAINT:
1315                 /* wParam may contain a valid HDC! */
1316                 return COMBO_Paint(lphc, wParam);
1317
1318         case WM_ERASEBKGND:
1319                 return TRUE;
1320
1321         case WM_GETDLGCODE:
1322                 return (LRESULT)(DLGC_WANTARROWS | DLGC_WANTCHARS);
1323
1324         case WM_SIZE:
1325                 if( lphc->hWndLBox &&
1326                   !(lphc->wState & CBF_NORESIZE) ) COMBO_Size( lphc );
1327                 return TRUE;
1328
1329         case WM_SETFONT:
1330                 COMBO_Font( lphc, (HFONT16)wParam, (BOOL)lParam );
1331                 return TRUE;
1332
1333         case WM_GETFONT:
1334                 return (LRESULT)lphc->hFont;
1335
1336         case WM_SETFOCUS:
1337                 if( lphc->wState & CBF_EDIT )
1338                     SetFocus( lphc->hWndEdit );
1339                 else
1340                     COMBO_SetFocus( lphc );
1341                 return TRUE;
1342
1343         case WM_KILLFOCUS:
1344 #define hwndFocus ((HWND16)wParam)
1345                 if( !hwndFocus ||
1346                     (hwndFocus != lphc->hWndEdit && hwndFocus != lphc->hWndLBox ))
1347                     COMBO_KillFocus( lphc );
1348 #undef hwndFocus
1349                 return TRUE;
1350
1351         case WM_COMMAND:
1352                 return COMBO_Command( lphc, wParam, (HWND)lParam );
1353
1354         case WM_GETTEXT:
1355                 return COMBO_GetText( lphc, (UINT)wParam, (LPSTR)lParam );
1356
1357         case WM_SETTEXT:
1358         case WM_GETTEXTLENGTH:
1359         case WM_CLEAR:
1360         case WM_CUT:
1361         case WM_PASTE:
1362         case WM_COPY:
1363                 if( lphc->wState & CBF_EDIT )
1364                     return SendMessageA( lphc->hWndEdit, message, wParam, lParam );
1365                 return CB_ERR;
1366
1367         case WM_DRAWITEM:
1368         case WM_DELETEITEM:
1369         case WM_COMPAREITEM:
1370         case WM_MEASUREITEM:
1371                 return COMBO_ItemOp( lphc, message, wParam, lParam );
1372
1373         case WM_ENABLE:
1374                 if( lphc->wState & CBF_EDIT )
1375                     EnableWindow( lphc->hWndEdit, (BOOL)wParam );
1376                 EnableWindow( lphc->hWndLBox, (BOOL)wParam );
1377                 return TRUE;
1378
1379         case WM_SETREDRAW:
1380                 if( wParam )
1381                     lphc->wState &= ~CBF_NOREDRAW;
1382                 else
1383                     lphc->wState |= CBF_NOREDRAW;
1384
1385                 if( lphc->wState & CBF_EDIT )
1386                     SendMessageA( lphc->hWndEdit, message, wParam, lParam );
1387                 SendMessageA( lphc->hWndLBox, message, wParam, lParam );
1388                 return 0;
1389
1390         case WM_SYSKEYDOWN:
1391                 if( KEYDATA_ALT & HIWORD(lParam) )
1392                     if( wParam == VK_UP || wParam == VK_DOWN )
1393                         COMBO_FlipListbox( lphc, TRUE );
1394                 break;
1395
1396         case WM_CHAR:
1397         case WM_KEYDOWN:
1398                 if( lphc->wState & CBF_EDIT )
1399                     return SendMessageA( lphc->hWndEdit, message, wParam, lParam );
1400                 else
1401                     return SendMessageA( lphc->hWndLBox, message, wParam, lParam );
1402
1403         case WM_LBUTTONDOWN:
1404                 if( !(lphc->wState & CBF_FOCUSED) ) SetFocus( lphc->self->hwndSelf );
1405                 if( lphc->wState & CBF_FOCUSED ) COMBO_LButtonDown( lphc, lParam );
1406                 return TRUE;
1407
1408         case WM_LBUTTONUP:
1409                 COMBO_LButtonUp( lphc, lParam );
1410                 return TRUE;
1411
1412         case WM_MOUSEMOVE:
1413                 if( lphc->wState & CBF_CAPTURE )
1414                     COMBO_MouseMove( lphc, wParam, lParam );
1415                 return TRUE;
1416
1417         /* Combo messages */
1418
1419         case CB_ADDSTRING16:
1420                 if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1421         case CB_ADDSTRING:
1422                 return SendMessageA( lphc->hWndLBox, LB_ADDSTRING, 0, lParam);
1423
1424         case CB_INSERTSTRING16:
1425                 wParam = (INT)(INT16)wParam;
1426                 if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1427         case CB_INSERTSTRING:
1428                 return SendMessageA( lphc->hWndLBox, LB_INSERTSTRING, wParam, lParam);
1429
1430         case CB_DELETESTRING16:
1431         case CB_DELETESTRING:
1432                 return SendMessageA( lphc->hWndLBox, LB_DELETESTRING, wParam, 0);
1433
1434         case CB_SELECTSTRING16:
1435                 wParam = (INT)(INT16)wParam;
1436                 if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1437         case CB_SELECTSTRING:
1438                 return COMBO_SelectString( lphc, (INT)wParam, (LPSTR)lParam );
1439
1440         case CB_FINDSTRING16:
1441                 wParam = (INT)(INT16)wParam;
1442                 if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1443         case CB_FINDSTRING:
1444                 return SendMessageA( lphc->hWndLBox, LB_FINDSTRING, wParam, lParam);
1445
1446         case CB_FINDSTRINGEXACT16:
1447                 wParam = (INT)(INT16)wParam;
1448                 if( CB_HASSTRINGS(lphc) ) lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1449         case CB_FINDSTRINGEXACT:
1450                 return SendMessageA( lphc->hWndLBox, LB_FINDSTRINGEXACT,
1451                                                        wParam, lParam );
1452         case CB_SETITEMHEIGHT16:
1453                 wParam = (INT)(INT16)wParam;    /* signed integer */
1454         case CB_SETITEMHEIGHT:
1455                 return COMBO_SetItemHeight( lphc, (INT)wParam, (INT)lParam);
1456
1457         case CB_GETITEMHEIGHT16:
1458                 wParam = (INT)(INT16)wParam;
1459         case CB_GETITEMHEIGHT:
1460                 if( (INT)wParam >= 0 )  /* listbox item */
1461                     return SendMessageA( lphc->hWndLBox, LB_GETITEMHEIGHT, wParam, 0);
1462                 return (lphc->RectEdit.bottom - lphc->RectEdit.top);
1463
1464         case CB_RESETCONTENT16:
1465         case CB_RESETCONTENT:
1466                 SendMessageA( lphc->hWndLBox, LB_RESETCONTENT, 0, 0 );
1467                 CBPaintText( lphc, 0 );
1468                 return TRUE;
1469
1470         case CB_INITSTORAGE:
1471                 return SendMessageA( lphc->hWndLBox, LB_INITSTORAGE, wParam, lParam);
1472
1473         case CB_GETHORIZONTALEXTENT:
1474                 return SendMessageA( lphc->hWndLBox, LB_GETHORIZONTALEXTENT, 0, 0);
1475
1476         case CB_SETHORIZONTALEXTENT:
1477                 return SendMessageA( lphc->hWndLBox, LB_SETHORIZONTALEXTENT, wParam, 0);
1478
1479         case CB_GETTOPINDEX:
1480                 return SendMessageA( lphc->hWndLBox, LB_GETTOPINDEX, 0, 0);
1481
1482         case CB_GETLOCALE:
1483                 return SendMessageA( lphc->hWndLBox, LB_GETLOCALE, 0, 0);
1484
1485         case CB_SETLOCALE:
1486                 return SendMessageA( lphc->hWndLBox, LB_SETLOCALE, wParam, 0);
1487
1488         case CB_GETDROPPEDWIDTH:
1489                 if( lphc->droppedWidth )
1490                     return lphc->droppedWidth;
1491                 return lphc->RectCombo.right - lphc->RectCombo.left -
1492                            (lphc->wState & CBF_EDIT) ? CBitOffset : 0;
1493
1494         case CB_SETDROPPEDWIDTH:
1495                 if( (CB_GETTYPE(lphc) != CBS_SIMPLE) &&
1496                     (INT)wParam < 32768 ) lphc->droppedWidth = (INT)wParam;
1497                 return CB_ERR;
1498
1499         case CB_GETDROPPEDCONTROLRECT16:
1500                 lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1501                 if( lParam )
1502                 {
1503                     RECT        r;
1504                     CBGetDroppedControlRect( lphc, &r );
1505                     CONV_RECT32TO16( &r, (LPRECT16)lParam );
1506                 }
1507                 return CB_OKAY;
1508
1509         case CB_GETDROPPEDCONTROLRECT:
1510                 if( lParam ) CBGetDroppedControlRect(lphc, (LPRECT)lParam );
1511                 return CB_OKAY;
1512
1513         case CB_GETDROPPEDSTATE16:
1514         case CB_GETDROPPEDSTATE:
1515                 return (lphc->wState & CBF_DROPPED) ? TRUE : FALSE;
1516
1517         case CB_DIR16:
1518                 lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1519                 /* fall through */
1520         case CB_DIR:
1521                 return COMBO_Directory( lphc, (UINT)wParam,
1522                                        (LPSTR)lParam, (message == CB_DIR));
1523         case CB_SHOWDROPDOWN16:
1524         case CB_SHOWDROPDOWN:
1525                 if( CB_GETTYPE(lphc) != CBS_SIMPLE )
1526                 {
1527                     if( wParam )
1528                     {
1529                         if( !(lphc->wState & CBF_DROPPED) )
1530                             CBDropDown( lphc );
1531                     }
1532                     else
1533                         if( lphc->wState & CBF_DROPPED )
1534                             CBRollUp( lphc, FALSE, TRUE );
1535                 }
1536                 return TRUE;
1537
1538         case CB_GETCOUNT16:
1539         case CB_GETCOUNT:
1540                 return SendMessageA( lphc->hWndLBox, LB_GETCOUNT, 0, 0);
1541
1542         case CB_GETCURSEL16:
1543         case CB_GETCURSEL:
1544                 return SendMessageA( lphc->hWndLBox, LB_GETCURSEL, 0, 0);
1545
1546         case CB_SETCURSEL16:
1547                 wParam = (INT)(INT16)wParam;
1548         case CB_SETCURSEL:
1549                 lParam = SendMessageA( lphc->hWndLBox, LB_SETCURSEL, wParam, 0);
1550                 if( lphc->wState & CBF_SELCHANGE )
1551                 {
1552                     /* no LBN_SELCHANGE in this case, update manually */
1553
1554                     CBPaintText( lphc, 0 );
1555                     lphc->wState &= ~CBF_SELCHANGE;
1556                 }
1557                 return lParam;
1558
1559         case CB_GETLBTEXT16:
1560                 wParam = (INT)(INT16)wParam;
1561                 lParam = (LPARAM)PTR_SEG_TO_LIN(lParam);
1562         case CB_GETLBTEXT:
1563                 return SendMessageA( lphc->hWndLBox, LB_GETTEXT, wParam, lParam);
1564
1565         case CB_GETLBTEXTLEN16:
1566                 wParam = (INT)(INT16)wParam;
1567         case CB_GETLBTEXTLEN:
1568                 return SendMessageA( lphc->hWndLBox, LB_GETTEXTLEN, wParam, 0);
1569
1570         case CB_GETITEMDATA16:
1571                 wParam = (INT)(INT16)wParam;
1572         case CB_GETITEMDATA:
1573                 return SendMessageA( lphc->hWndLBox, LB_GETITEMDATA, wParam, 0);
1574
1575         case CB_SETITEMDATA16:
1576                 wParam = (INT)(INT16)wParam;
1577         case CB_SETITEMDATA:
1578                 return SendMessageA( lphc->hWndLBox, LB_SETITEMDATA, wParam, lParam);
1579
1580         case CB_GETEDITSEL16:
1581                 wParam = lParam = 0;   /* just in case */
1582         case CB_GETEDITSEL:
1583                 if( lphc->wState & CBF_EDIT )
1584                 {
1585                     INT a, b;
1586
1587                     return SendMessageA( lphc->hWndEdit, EM_GETSEL,
1588                                            (wParam) ? wParam : (WPARAM)&a,
1589                                            (lParam) ? lParam : (LPARAM)&b );
1590                 }
1591                 return CB_ERR;
1592
1593         case CB_SETEDITSEL16:
1594         case CB_SETEDITSEL:
1595                 if( lphc->wState & CBF_EDIT )
1596                     return SendMessageA( lphc->hWndEdit, EM_SETSEL,
1597                           (INT)(INT16)LOWORD(lParam), (INT)(INT16)HIWORD(lParam) );
1598                 return CB_ERR;
1599
1600         case CB_SETEXTENDEDUI16:
1601         case CB_SETEXTENDEDUI:
1602                 if( CB_GETTYPE(lphc) == CBS_SIMPLE ) return CB_ERR;
1603
1604                 if( wParam )
1605                     lphc->wState |= CBF_EUI;
1606                 else lphc->wState &= ~CBF_EUI;
1607                 return CB_OKAY;
1608
1609         case CB_GETEXTENDEDUI16:
1610         case CB_GETEXTENDEDUI:
1611                 return (lphc->wState & CBF_EUI) ? TRUE : FALSE;
1612
1613         case (WM_USER + 0x1B):
1614                 WARN(combo, "[%04x]: undocumented msg!\n", hwnd );
1615     }
1616     return DefWindowProcA(hwnd, message, wParam, lParam);
1617   }
1618   return CB_ERR;
1619 }
1620