git.oblomov.eu Git - wine/blob - controls/scroll.c

   1 /*
   2  * Scrollbar control
   3  *
   4  * Copyright 1993 Martin Ayotte
   5  * Copyright 1994, 1996 Alexandre Julliard
   6  */
   7
   8 #include "windef.h"
   9 #include "wingdi.h"
  10 #include "wine/winuser16.h"
  11 #include "controls.h"
  12 #include "win.h"
  13 #include "debugtools.h"
  14 #include "user.h"
  15
  16 DEFAULT_DEBUG_CHANNEL(scroll);
  17
  18 typedef struct
  19 {
  20     INT   CurVal;   /* Current scroll-bar value */
  21     INT   MinVal;   /* Minimum scroll-bar value */
  22     INT   MaxVal;   /* Maximum scroll-bar value */
  23     INT   Page;     /* Page size of scroll bar (Win32) */
  24     UINT  flags;    /* EnableScrollBar flags */
  25 } SCROLLBAR_INFO;
  26
  27
  28 static HBITMAP hUpArrow;
  29 static HBITMAP hDnArrow;
  30 static HBITMAP hLfArrow;
  31 static HBITMAP hRgArrow;
  32 static HBITMAP hUpArrowD;
  33 static HBITMAP hDnArrowD;
  34 static HBITMAP hLfArrowD;
  35 static HBITMAP hRgArrowD;
  36 static HBITMAP hUpArrowI;
  37 static HBITMAP hDnArrowI;
  38 static HBITMAP hLfArrowI;
  39 static HBITMAP hRgArrowI;
  40
  41 #define TOP_ARROW(flags,pressed) \
  42    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  43 #define BOTTOM_ARROW(flags,pressed) \
  44    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  45 #define LEFT_ARROW(flags,pressed) \
  46    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  47 #define RIGHT_ARROW(flags,pressed) \
  48    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  49
  50
  51   /* Minimum size of the rectangle between the arrows */
  52 #define SCROLL_MIN_RECT  4
  53
  54   /* Minimum size of the thumb in pixels */
  55 #define SCROLL_MIN_THUMB 6
  56
  57   /* Overlap between arrows and thumb */
  58 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
  59
  60   /* Delay (in ms) before first repetition when holding the button down */
  61 #define SCROLL_FIRST_DELAY   200
  62
  63   /* Delay (in ms) between scroll repetitions */
  64 #define SCROLL_REPEAT_DELAY  50
  65
  66   /* Scroll timer id */
  67 #define SCROLL_TIMER   0
  68
  69   /* Scroll-bar hit testing */
  70 enum SCROLL_HITTEST
  71 {
  72     SCROLL_NOWHERE,      /* Outside the scroll bar */
  73     SCROLL_TOP_ARROW,    /* Top or left arrow */
  74     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  75     SCROLL_THUMB,        /* Thumb rectangle */
  76     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  77     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  78 };
  79
  80  /* What to do after SCROLL_SetScrollInfo() */
  81 #define SA_SSI_HIDE             0x0001
  82 #define SA_SSI_SHOW             0x0002
  83 #define SA_SSI_REFRESH          0x0004
  84 #define SA_SSI_REPAINT_ARROWS   0x0008
  85
  86  /* Thumb-tracking info */
  87 static HWND SCROLL_TrackingWin = 0;
  88 static INT  SCROLL_TrackingBar = 0;
  89 static INT  SCROLL_TrackingPos = 0;
  90 static INT  SCROLL_TrackingVal = 0;
  91  /* Hit test code of the last button-down event */
  92 static enum SCROLL_HITTEST SCROLL_trackHitTest;
  93 static BOOL SCROLL_trackVertical;
  94
  95  /* Is the moving thumb being displayed? */
  96 static BOOL SCROLL_MovingThumb = FALSE;
  97
  98  /* Local functions */
  99 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
 100                                     BOOL fShowH, BOOL fShowV );
 101 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
 102                                    const SCROLLINFO *info, INT *action );
 103 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 104                                     RECT *rect, INT arrowSize,
 105                                     INT thumbSize, INT thumbPos,
 106                                     UINT flags, BOOL vertical,
 107                                     BOOL top_selected, BOOL bottom_selected );
 108 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
 109
 110
 111 /*********************************************************************
 112  * scrollbar class descriptor
 113  */
 114 const struct builtin_class_descr SCROLL_builtin_class =
 115 {
 116     "ScrollBar",            /* name */
 117     CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style  */
 118     NULL,                   /* procA (winproc is Unicode only) */
 119     ScrollBarWndProc,       /* procW */
 120     sizeof(SCROLLBAR_INFO), /* extra */
 121     IDC_ARROWA,             /* cursor */
 122     0                       /* brush */
 123 };
 124
 125
 126 /***********************************************************************
 127  *           SCROLL_LoadBitmaps
 128  */
 129 static void SCROLL_LoadBitmaps(void)
 130 {
 131     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 132     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 133     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 134     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 135     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 136     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 137     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 138     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 139     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 140     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 141     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 142     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 143 }
 144
 145
 146 /***********************************************************************
 147  *           SCROLL_GetPtrScrollInfo
 148  */
 149 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
 150 {
 151     SCROLLBAR_INFO *infoPtr;
 152
 153     if (!wndPtr) return NULL;
 154     switch(nBar)
 155     {
 156         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 157         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 158         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 159         default:      return NULL;
 160     }
 161
 162     if (!infoPtr)  /* Create the info structure if needed */
 163     {
 164         if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
 165         {
 166             infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
 167             infoPtr->MaxVal = 100;
 168             infoPtr->flags  = ESB_ENABLE_BOTH;
 169             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 170             else wndPtr->pVScroll = infoPtr;
 171         }
 172         if (!hUpArrow) SCROLL_LoadBitmaps();
 173     }
 174     return infoPtr;
 175 }
 176
 177
 178 /***********************************************************************
 179  *           SCROLL_GetScrollInfo
 180  */
 181 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
 182 {
 183    SCROLLBAR_INFO *retvalue;
 184    WND *wndPtr = WIN_FindWndPtr( hwnd );
 185    retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 186    WIN_ReleaseWndPtr(wndPtr);
 187    return retvalue;
 188 }
 189
 190
 191 /***********************************************************************
 192  *           SCROLL_GetScrollBarRect
 193  *
 194  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 195  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 196  * 'arrowSize' returns the width or height of an arrow (depending on
 197  * the orientation of the scrollbar), 'thumbSize' returns the size of
 198  * the thumb, and 'thumbPos' returns the position of the thumb
 199  * relative to the left or to the top.
 200  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 201  */
 202 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 203                                        INT *arrowSize, INT *thumbSize,
 204                                        INT *thumbPos )
 205 {
 206     INT pixels;
 207     BOOL vertical;
 208     WND *wndPtr = WIN_FindWndPtr( hwnd );
 209
 210     switch(nBar)
 211     {
 212       case SB_HORZ:
 213         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 214         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 215         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 216         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 217         if(wndPtr->dwStyle & WS_BORDER) {
 218           lprect->left--;
 219           lprect->right++;
 220         } else if(wndPtr->dwStyle & WS_VSCROLL)
 221           lprect->right++;
 222         vertical = FALSE;
 223         break;
 224
 225       case SB_VERT:
 226         lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 227         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 228         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 229         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 230         if(wndPtr->dwStyle & WS_BORDER) {
 231           lprect->top--;
 232           lprect->bottom++;
 233         } else if(wndPtr->dwStyle & WS_HSCROLL)
 234           lprect->bottom++;
 235         vertical = TRUE;
 236         break;
 237
 238       case SB_CTL:
 239         GetClientRect( hwnd, lprect );
 240         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 241         break;
 242
 243     default:
 244         WIN_ReleaseWndPtr(wndPtr);
 245         return FALSE;
 246     }
 247
 248     if (vertical) pixels = lprect->bottom - lprect->top;
 249     else pixels = lprect->right - lprect->left;
 250
 251     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 252     {
 253         if (pixels > SCROLL_MIN_RECT)
 254             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 255         else
 256             *arrowSize = 0;
 257         *thumbPos = *thumbSize = 0;
 258     }
 259     else
 260     {
 261         SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 262
 263         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 264         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 265
 266         if (info->Page)
 267         {
 268             *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
 269             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 270         }
 271         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 272
 273         if (((pixels -= *thumbSize ) < 0) ||
 274             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 275         {
 276             /* Rectangle too small or scrollbar disabled -> no thumb */
 277             *thumbPos = *thumbSize = 0;
 278         }
 279         else
 280         {
 281             INT max = info->MaxVal - max( info->Page-1, 0 );
 282             if (info->MinVal >= max)
 283                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 284             else
 285                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 286                  + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
 287         }
 288     }
 289     WIN_ReleaseWndPtr(wndPtr);
 290     return vertical;
 291 }
 292
 293
 294 /***********************************************************************
 295  *           SCROLL_GetThumbVal
 296  *
 297  * Compute the current scroll position based on the thumb position in pixels
 298  * from the top of the scroll-bar.
 299  */
 300 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 301                                   BOOL vertical, INT pos )
 302 {
 303     INT thumbSize;
 304     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 305
 306     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 307         return infoPtr->MinVal;
 308
 309     if (infoPtr->Page)
 310     {
 311         thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
 312         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 313     }
 314     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 315
 316     if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
 317
 318     pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 319     if (pos > pixels) pos = pixels;
 320
 321     if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
 322     else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
 323     return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
 324 }
 325
 326 /***********************************************************************
 327  *           SCROLL_PtInRectEx
 328  */
 329 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 330 {
 331     RECT rect = *lpRect;
 332
 333     if (vertical)
 334     {
 335         rect.left -= lpRect->right - lpRect->left;
 336         rect.right += lpRect->right - lpRect->left;
 337     }
 338     else
 339     {
 340         rect.top -= lpRect->bottom - lpRect->top;
 341         rect.bottom += lpRect->bottom - lpRect->top;
 342     }
 343     return PtInRect( &rect, pt );
 344 }
 345
 346 /***********************************************************************
 347  *           SCROLL_ClipPos
 348  */
 349 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 350 {
 351     if( pt.x < lpRect->left )
 352         pt.x = lpRect->left;
 353     else
 354     if( pt.x > lpRect->right )
 355         pt.x = lpRect->right;
 356
 357     if( pt.y < lpRect->top )
 358         pt.y = lpRect->top;
 359     else
 360     if( pt.y > lpRect->bottom )
 361         pt.y = lpRect->bottom;
 362
 363     return pt;
 364 }
 365
 366
 367 /***********************************************************************
 368  *           SCROLL_HitTest
 369  *
 370  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 371  */
 372 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 373                                            POINT pt, BOOL bDragging )
 374 {
 375     INT arrowSize, thumbSize, thumbPos;
 376     RECT rect;
 377
 378     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 379                                            &arrowSize, &thumbSize, &thumbPos );
 380
 381     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 382          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 383
 384     if (vertical)
 385     {
 386         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 387         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 388         if (!thumbPos) return SCROLL_TOP_RECT;
 389         pt.y -= rect.top;
 390         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 391         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 392     }
 393     else  /* horizontal */
 394     {
 395         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 396         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 397         if (!thumbPos) return SCROLL_TOP_RECT;
 398         pt.x -= rect.left;
 399         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 400         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 401     }
 402     return SCROLL_THUMB;
 403 }
 404
 405
 406 /***********************************************************************
 407  *           SCROLL_DrawArrows
 408  *
 409  * Draw the scroll bar arrows.
 410  */
 411 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
 412                                   RECT *rect, INT arrowSize, BOOL vertical,
 413                                   BOOL top_pressed, BOOL bottom_pressed )
 414 {
 415   RECT r;
 416
 417   r = *rect;
 418   if( vertical )
 419     r.bottom = r.top + arrowSize;
 420   else
 421     r.right = r.left + arrowSize;
 422
 423   DrawFrameControl( hdc, &r, DFC_SCROLL,
 424                     (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
 425                     | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 426                     | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
 427
 428   r = *rect;
 429   if( vertical )
 430     r.top = r.bottom-arrowSize;
 431   else
 432     r.left = r.right-arrowSize;
 433
 434   DrawFrameControl( hdc, &r, DFC_SCROLL,
 435                     (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
 436                     | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 437                     | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
 438 }
 439
 440 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
 441                                   RECT *rect, INT arrowSize, BOOL vertical,
 442                                   BOOL top_pressed, BOOL bottom_pressed )
 443 {
 444     HDC hdcMem = CreateCompatibleDC( hdc );
 445     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 446                                     TOP_ARROW(infoPtr->flags, top_pressed)
 447                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 448
 449     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 450     StretchBlt( hdc, rect->left, rect->top,
 451                   vertical ? rect->right-rect->left : arrowSize,
 452                   vertical ? arrowSize : rect->bottom-rect->top,
 453                   hdcMem, 0, 0,
 454                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 455                   SRCCOPY );
 456
 457     SelectObject( hdcMem, vertical ?
 458                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 459                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 460     if (vertical)
 461         StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
 462                       rect->right - rect->left, arrowSize,
 463                       hdcMem, 0, 0,
 464                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 465                       SRCCOPY );
 466     else
 467         StretchBlt( hdc, rect->right - arrowSize, rect->top,
 468                       arrowSize, rect->bottom - rect->top,
 469                       hdcMem, 0, 0,
 470                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 471                       SRCCOPY );
 472     SelectObject( hdcMem, hbmpPrev );
 473     DeleteDC( hdcMem );
 474 }
 475
 476 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 477                                RECT *rect, INT arrowSize, BOOL vertical,
 478                                BOOL top_pressed, BOOL bottom_pressed )
 479 {
 480   if( TWEAK_WineLook == WIN31_LOOK )
 481     SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
 482                           vertical, top_pressed,bottom_pressed );
 483   else
 484     SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
 485                           vertical, top_pressed,bottom_pressed );
 486 }
 487
 488
 489 /***********************************************************************
 490  *           SCROLL_DrawMovingThumb
 491  *
 492  * Draw the moving thumb rectangle.
 493  */
 494 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
 495                                        INT arrowSize, INT thumbSize )
 496 {
 497     RECT r = *rect;
 498     if (vertical)
 499     {
 500         r.top += SCROLL_TrackingPos;
 501         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 502             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 503         if (r.top + thumbSize >
 504                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 505             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 506                                                                   - thumbSize;
 507         r.bottom = r.top + thumbSize;
 508     }
 509     else
 510     {
 511         r.left += SCROLL_TrackingPos;
 512         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 513             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 514         if (r.left + thumbSize >
 515                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 516             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 517                                                                   - thumbSize;
 518         r.right = r.left + thumbSize;
 519     }
 520
 521     DrawFocusRect( hdc, &r );
 522     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 523 }
 524
 525 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
 526                                        INT arrowSize, INT thumbSize )
 527 {
 528   INT pos = SCROLL_TrackingPos;
 529   INT max_size;
 530
 531   if( vertical )
 532     max_size = rect->bottom - rect->top;
 533   else
 534     max_size = rect->right - rect->left;
 535
 536   max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
 537
 538   if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
 539     pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
 540   else if( pos > max_size )
 541     pos = max_size;
 542
 543   SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
 544                           rect, arrowSize, thumbSize, pos,
 545                           0, vertical, FALSE, FALSE );
 546
 547   SCROLL_MovingThumb = !SCROLL_MovingThumb;
 548 }
 549
 550 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 551                                     INT arrowSize, INT thumbSize )
 552 {
 553   if( TWEAK_WineLook == WIN31_LOOK )
 554     SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
 555   else
 556     SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
 557 }
 558
 559 /***********************************************************************
 560  *           SCROLL_DrawInterior
 561  *
 562  * Draw the scroll bar interior (everything except the arrows).
 563  */
 564 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 565                                     RECT *rect, INT arrowSize,
 566                                     INT thumbSize, INT thumbPos,
 567                                     UINT flags, BOOL vertical,
 568                                     BOOL top_selected, BOOL bottom_selected )
 569 {
 570     RECT r;
 571     HPEN hSavePen;
 572     HBRUSH hSaveBrush,hBrush;
 573
 574     /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 575      * The window-owned scrollbars need to call DEFWND_ControlColor
 576      * to correctly setup default scrollbar colors
 577      */
 578     if (nBar == SB_CTL)
 579     {
 580       hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 581                                      (WPARAM)hdc,(LPARAM)hwnd);
 582     }
 583     else
 584     {
 585       hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 586     }
 587
 588     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 589     hSaveBrush = SelectObject( hdc, hBrush );
 590
 591     /* Calculate the scroll rectangle */
 592     r = *rect;
 593     if (vertical)
 594     {
 595         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 596         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 597     }
 598     else
 599     {
 600         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 601         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 602     }
 603
 604     /* Draw the scroll rectangles and thumb */
 605     if (!thumbPos)  /* No thumb to draw */
 606     {
 607         PatBlt( hdc, r.left, r.top,
 608                      r.right - r.left, r.bottom - r.top,
 609                      PATCOPY );
 610
 611         /* cleanup and return */
 612         SelectObject( hdc, hSavePen );
 613         SelectObject( hdc, hSaveBrush );
 614         return;
 615     }
 616
 617     if (vertical)
 618     {
 619         PatBlt( hdc, r.left, r.top,
 620                   r.right - r.left,
 621                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 622                   top_selected ? 0x0f0000 : PATCOPY );
 623         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 624         PatBlt( hdc, r.left, r.top + thumbSize,
 625                   r.right - r.left,
 626                   r.bottom - r.top - thumbSize,
 627                   bottom_selected ? 0x0f0000 : PATCOPY );
 628         r.bottom = r.top + thumbSize;
 629     }
 630     else  /* horizontal */
 631     {
 632         PatBlt( hdc, r.left, r.top,
 633                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 634                   r.bottom - r.top,
 635                   top_selected ? 0x0f0000 : PATCOPY );
 636         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 637         PatBlt( hdc, r.left + thumbSize, r.top,
 638                   r.right - r.left - thumbSize,
 639                   r.bottom - r.top,
 640                   bottom_selected ? 0x0f0000 : PATCOPY );
 641         r.right = r.left + thumbSize;
 642     }
 643
 644     /* Draw the thumb */
 645     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE  );
 646
 647     /* cleanup */
 648     SelectObject( hdc, hSavePen );
 649     SelectObject( hdc, hSaveBrush );
 650 }
 651
 652
 653 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 654                                  RECT *rect, INT arrowSize,
 655                                  INT thumbSize, INT thumbPos,
 656                                  UINT flags, BOOL vertical,
 657                                  BOOL top_selected, BOOL bottom_selected )
 658 {
 659     RECT r;
 660     HPEN hSavePen;
 661     HBRUSH hSaveBrush,hBrush;
 662     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 663
 664     if (Save_SCROLL_MovingThumb &&
 665         (SCROLL_TrackingWin == hwnd) &&
 666         (SCROLL_TrackingBar == nBar))
 667         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 668
 669       /* Select the correct brush and pen */
 670
 671     if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 672     {
 673         /* This ought to be the color of the parent window */
 674         hBrush = GetSysColorBrush(COLOR_WINDOW);
 675     }
 676     else
 677     {
 678         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 679          * The window-owned scrollbars need to call DEFWND_ControlColor
 680          * to correctly setup default scrollbar colors
 681          */
 682         if (nBar == SB_CTL) {
 683             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 684                                            (WPARAM)hdc,(LPARAM)hwnd);
 685         } else {
 686             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 687         }
 688     }
 689     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 690     hSaveBrush = SelectObject( hdc, hBrush );
 691
 692       /* Calculate the scroll rectangle */
 693
 694     r = *rect;
 695     if (vertical)
 696     {
 697         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 698         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 699     }
 700     else
 701     {
 702         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 703         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 704     }
 705
 706       /* Draw the scroll bar frame */
 707
 708         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 709     if (TWEAK_WineLook == WIN31_LOOK)
 710         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 711
 712       /* Draw the scroll rectangles and thumb */
 713
 714     if (!thumbPos)  /* No thumb to draw */
 715     {
 716         INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
 717
 718         PatBlt( hdc, r.left+offset, r.top+offset,
 719                      r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
 720                      PATCOPY );
 721
 722         /* cleanup and return */
 723         SelectObject( hdc, hSavePen );
 724         SelectObject( hdc, hSaveBrush );
 725         return;
 726     }
 727
 728     if (vertical)
 729     {
 730         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 731
 732         PatBlt( hdc, r.left + offset, r.top + offset,
 733                   r.right - r.left - offset*2,
 734                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
 735                   top_selected ? 0x0f0000 : PATCOPY );
 736         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 737         PatBlt( hdc, r.left + offset, r.top + thumbSize,
 738                   r.right - r.left - offset*2,
 739                   r.bottom - r.top - thumbSize - offset,
 740                   bottom_selected ? 0x0f0000 : PATCOPY );
 741         r.bottom = r.top + thumbSize;
 742     }
 743     else  /* horizontal */
 744     {
 745         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 746
 747         PatBlt( hdc, r.left + offset, r.top + offset,
 748                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 749                   r.bottom - r.top - offset*2,
 750                   top_selected ? 0x0f0000 : PATCOPY );
 751         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 752         PatBlt( hdc, r.left + thumbSize, r.top + offset,
 753                   r.right - r.left - thumbSize - offset,
 754                   r.bottom - r.top - offset*2,
 755                   bottom_selected ? 0x0f0000 : PATCOPY );
 756         r.right = r.left + thumbSize;
 757     }
 758
 759       /* Draw the thumb */
 760
 761     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 762     if (TWEAK_WineLook == WIN31_LOOK)
 763     {
 764         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 765         r.top++, r.left++;
 766     }
 767     else
 768     {
 769         Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
 770     }
 771     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 772
 773     if (Save_SCROLL_MovingThumb &&
 774         (SCROLL_TrackingWin == hwnd) &&
 775         (SCROLL_TrackingBar == nBar))
 776         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 777
 778     /* cleanup */
 779     SelectObject( hdc, hSavePen );
 780     SelectObject( hdc, hSaveBrush );
 781 }
 782
 783
 784 /***********************************************************************
 785  *           SCROLL_DrawScrollBar
 786  *
 787  * Redraw the whole scrollbar.
 788  */
 789 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 790                            BOOL arrows, BOOL interior )
 791 {
 792     INT arrowSize, thumbSize, thumbPos;
 793     RECT rect;
 794     BOOL vertical;
 795     WND *wndPtr = WIN_FindWndPtr( hwnd );
 796     SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 797     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 798
 799     if (!wndPtr || !infoPtr ||
 800         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 801         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 802     if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
 803
 804     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 805                                         &arrowSize, &thumbSize, &thumbPos );
 806
 807     /* do not draw if the scrollbar rectangle is empty */
 808     if(IsRectEmpty(&rect))
 809       goto END;
 810
 811     if (Save_SCROLL_MovingThumb &&
 812         (SCROLL_TrackingWin == hwnd) &&
 813         (SCROLL_TrackingBar == nBar))
 814         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 815
 816       /* Draw the arrows */
 817
 818     if (arrows && arrowSize)
 819     {
 820         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 821             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 822                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 823                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 824         else
 825             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 826                                                                FALSE, FALSE );
 827     }
 828     if( interior )
 829         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 830                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 831
 832     if (Save_SCROLL_MovingThumb &&
 833         (SCROLL_TrackingWin == hwnd) &&
 834         (SCROLL_TrackingBar == nBar))
 835         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 836
 837     /* if scroll bar has focus, reposition the caret */
 838     if(hwnd==GetFocus() && (nBar==SB_CTL))
 839     {
 840         if (!vertical)
 841         {
 842             SetCaretPos(thumbPos+1, rect.top+1);
 843         }
 844         else
 845         {
 846             SetCaretPos(rect.top+1, thumbPos+1);
 847         }
 848     }
 849
 850 END:
 851     WIN_ReleaseWndPtr(wndPtr);
 852 }
 853
 854
 855 /***********************************************************************
 856  *           SCROLL_RefreshScrollBar
 857  *
 858  * Repaint the scroll bar interior after a SetScrollRange() or
 859  * SetScrollPos() call.
 860  */
 861 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 862                                      BOOL arrows, BOOL interior )
 863 {
 864     HDC hdc = GetDCEx( hwnd, 0,
 865                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 866     if (!hdc) return;
 867
 868     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 869     ReleaseDC( hwnd, hdc );
 870 }
 871
 872
 873 /***********************************************************************
 874  *           SCROLL_HandleKbdEvent
 875  *
 876  * Handle a keyboard event (only for SB_CTL scrollbars).
 877  */
 878 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
 879 {
 880     WND *wndPtr = WIN_FindWndPtr( hwnd );
 881     WPARAM msg;
 882
 883     switch(wParam)
 884     {
 885     case VK_PRIOR: msg = SB_PAGEUP; break;
 886     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 887     case VK_HOME:  msg = SB_TOP; break;
 888     case VK_END:   msg = SB_BOTTOM; break;
 889     case VK_UP:    msg = SB_LINEUP; break;
 890     case VK_DOWN:  msg = SB_LINEDOWN; break;
 891     default:
 892         WIN_ReleaseWndPtr(wndPtr);
 893         return;
 894     }
 895     SendMessageW( GetParent(hwnd),
 896                     (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 897                     msg, hwnd );
 898     WIN_ReleaseWndPtr(wndPtr);
 899 }
 900
 901
 902 /***********************************************************************
 903  *           SCROLL_HandleScrollEvent
 904  *
 905  * Handle a mouse or timer event for the scrollbar.
 906  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 907  * windows coordinates.
 908  */
 909 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 910 {
 911       /* Previous mouse position for timer events */
 912     static POINT prevPt;
 913       /* Thumb position when tracking started. */
 914     static UINT trackThumbPos;
 915       /* Position in the scroll-bar of the last button-down event. */
 916     static INT lastClickPos;
 917       /* Position in the scroll-bar of the last mouse event. */
 918     static INT lastMousePos;
 919
 920     enum SCROLL_HITTEST hittest;
 921     HWND hwndOwner, hwndCtl;
 922     BOOL vertical;
 923     INT arrowSize, thumbSize, thumbPos;
 924     RECT rect;
 925     HDC hdc;
 926
 927     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 928     if (!infoPtr) return;
 929     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 930                   return;
 931
 932     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 933     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 934                                         &arrowSize, &thumbSize, &thumbPos );
 935     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 936     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 937
 938     switch(msg)
 939     {
 940       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 941           HideCaret(hwnd);  /* hide caret while holding down LBUTTON */
 942           SCROLL_trackVertical = vertical;
 943           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 944           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 945           lastMousePos  = lastClickPos;
 946           trackThumbPos = thumbPos;
 947           prevPt = pt;
 948           SetCapture( hwnd );
 949           if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
 950           break;
 951
 952       case WM_MOUSEMOVE:
 953           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 954           prevPt = pt;
 955           break;
 956
 957       case WM_LBUTTONUP:
 958           hittest = SCROLL_NOWHERE;
 959           ReleaseCapture();
 960           /* if scrollbar has focus, show back caret */
 961           if (hwnd==GetFocus()) ShowCaret(hwnd);
 962           break;
 963
 964       case WM_SYSTIMER:
 965           pt = prevPt;
 966           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 967           break;
 968
 969       default:
 970           return;  /* Should never happen */
 971     }
 972
 973     TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
 974                  hwnd, nBar, msg, pt.x, pt.y, hittest );
 975
 976     switch(SCROLL_trackHitTest)
 977     {
 978     case SCROLL_NOWHERE:  /* No tracking in progress */
 979         break;
 980
 981     case SCROLL_TOP_ARROW:
 982         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 983                            (hittest == SCROLL_trackHitTest), FALSE );
 984         if (hittest == SCROLL_trackHitTest)
 985         {
 986             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 987             {
 988                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 989                                 SB_LINEUP, hwndCtl );
 990             }
 991
 992             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 993                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 994                             (TIMERPROC)0 );
 995         }
 996         else KillSystemTimer( hwnd, SCROLL_TIMER );
 997         break;
 998
 999     case SCROLL_TOP_RECT:
1000         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1001                              thumbPos, infoPtr->flags, vertical,
1002                              (hittest == SCROLL_trackHitTest), FALSE );
1003         if (hittest == SCROLL_trackHitTest)
1004         {
1005             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1006             {
1007                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1008                                 SB_PAGEUP, hwndCtl );
1009                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1010                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1011                                   (TIMERPROC)0 );
1012             }
1013         }
1014         else KillSystemTimer( hwnd, SCROLL_TIMER );
1015         break;
1016
1017     case SCROLL_THUMB:
1018         if (msg == WM_LBUTTONDOWN)
1019         {
1020             SCROLL_TrackingWin = hwnd;
1021             SCROLL_TrackingBar = nBar;
1022             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1023             if (!SCROLL_MovingThumb)
1024                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1025         }
1026         else if (msg == WM_LBUTTONUP)
1027         {
1028             if (SCROLL_MovingThumb)
1029                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1030             SCROLL_TrackingWin = 0;
1031             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1032                                  thumbPos, infoPtr->flags, vertical,
1033                                  FALSE, FALSE );
1034         }
1035         else  /* WM_MOUSEMOVE */
1036         {
1037             UINT pos;
1038
1039             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1040             else
1041             {
1042                 pt = SCROLL_ClipPos( &rect, pt );
1043                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1044             }
1045             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1046             {
1047                 if (SCROLL_MovingThumb)
1048                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1049                                         arrowSize, thumbSize );
1050                 lastMousePos = pos;
1051                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1052                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1053                                                          vertical,
1054                                                          SCROLL_TrackingPos );
1055                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1056                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1057                                 hwndCtl );
1058                 if (!SCROLL_MovingThumb)
1059                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1060                                         arrowSize, thumbSize );
1061             }
1062         }
1063         break;
1064
1065     case SCROLL_BOTTOM_RECT:
1066         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1067                              thumbPos, infoPtr->flags, vertical,
1068                              FALSE, (hittest == SCROLL_trackHitTest) );
1069         if (hittest == SCROLL_trackHitTest)
1070         {
1071             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1072             {
1073                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1074                                 SB_PAGEDOWN, hwndCtl );
1075                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1076                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1077                                   (TIMERPROC)0 );
1078             }
1079         }
1080         else KillSystemTimer( hwnd, SCROLL_TIMER );
1081         break;
1082
1083     case SCROLL_BOTTOM_ARROW:
1084         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1085                            FALSE, (hittest == SCROLL_trackHitTest) );
1086         if (hittest == SCROLL_trackHitTest)
1087         {
1088             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1089             {
1090                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1091                                 SB_LINEDOWN, hwndCtl );
1092             }
1093
1094             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1095                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1096                             (TIMERPROC)0 );
1097         }
1098         else KillSystemTimer( hwnd, SCROLL_TIMER );
1099         break;
1100     }
1101
1102     if (msg == WM_LBUTTONUP)
1103     {
1104         hittest = SCROLL_trackHitTest;
1105         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
1106
1107         if (hittest == SCROLL_THUMB)
1108         {
1109             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1110                                  trackThumbPos + lastMousePos - lastClickPos );
1111             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1112                             MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
1113         }
1114         else
1115             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1116                             SB_ENDSCROLL, hwndCtl );
1117     }
1118
1119     ReleaseDC( hwnd, hdc );
1120 }
1121
1122
1123 /***********************************************************************
1124  *           ScrollBarWndProc
1125  */
1126 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1127 {
1128     switch(message)
1129     {
1130     case WM_CREATE:
1131         {
1132             CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1133             if (lpCreat->style & SBS_SIZEBOX)
1134             {
1135                 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1136                 return 0;
1137             }
1138             if (lpCreat->style & SBS_VERT)
1139             {
1140                 if (lpCreat->style & SBS_LEFTALIGN)
1141                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1142                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1143                 else if (lpCreat->style & SBS_RIGHTALIGN)
1144                     MoveWindow( hwnd,
1145                                   lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1146                                   lpCreat->y,
1147                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1148             }
1149             else  /* SBS_HORZ */
1150             {
1151                 if (lpCreat->style & SBS_TOPALIGN)
1152                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1153                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1154                 else if (lpCreat->style & SBS_BOTTOMALIGN)
1155                     MoveWindow( hwnd,
1156                                   lpCreat->x,
1157                                   lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1158                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1159             }
1160         }
1161         if (!hUpArrow) SCROLL_LoadBitmaps();
1162         TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1163         return 0;
1164
1165     case WM_LBUTTONDOWN:
1166     case WM_LBUTTONUP:
1167     case WM_MOUSEMOVE:
1168     case WM_SYSTIMER:
1169         {
1170             POINT pt;
1171             pt.x = SLOWORD(lParam);
1172             pt.y = SHIWORD(lParam);
1173             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1174         }
1175         break;
1176
1177     /* if key event is received, the scrollbar has the focus */
1178     case WM_KEYDOWN:
1179         /* hide caret on first KEYDOWN to prevent flicker */
1180         if ((lParam & 0x40000000)==0)
1181             HideCaret(hwnd);
1182         SCROLL_HandleKbdEvent( hwnd, wParam );
1183         break;
1184
1185     case WM_KEYUP:
1186         ShowCaret(hwnd);
1187         break;
1188
1189     case WM_SETFOCUS:
1190         {
1191             /* Create a caret when a ScrollBar get focus */
1192             RECT rect;
1193             int arrowSize, thumbSize, thumbPos, vertical;
1194             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1195                                                 &arrowSize, &thumbSize, &thumbPos );
1196             if (!vertical)
1197             {
1198                 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1199                 SetCaretPos(thumbPos+1, rect.top+1);
1200             }
1201             else
1202             {
1203                 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1204                 SetCaretPos(rect.top+1, thumbPos+1);
1205             }
1206             ShowCaret(hwnd);
1207         }
1208         break;
1209
1210     case WM_KILLFOCUS:
1211         {
1212             RECT rect;
1213             int arrowSize, thumbSize, thumbPos, vertical;
1214             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1215             if (!vertical){
1216                 rect.left=thumbPos+1;
1217                 rect.right=rect.left+thumbSize;
1218             }
1219             else
1220             {
1221                 rect.top=thumbPos+1;
1222                 rect.bottom=rect.top+thumbSize;
1223             }
1224             HideCaret(hwnd);
1225             InvalidateRect(hwnd,&rect,0);
1226             DestroyCaret();
1227         }
1228         break;
1229
1230     case WM_ERASEBKGND:
1231          return 1;
1232
1233     case WM_GETDLGCODE:
1234          return DLGC_WANTARROWS; /* Windows returns this value */
1235
1236     case WM_PAINT:
1237         {
1238             PAINTSTRUCT ps;
1239             HDC hdc = BeginPaint( hwnd, &ps );
1240             SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1241             EndPaint( hwnd, &ps );
1242         }
1243         break;
1244
1245     case SBM_SETPOS16:
1246     case SBM_SETPOS:
1247         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1248
1249     case SBM_GETPOS16:
1250     case SBM_GETPOS:
1251         return GetScrollPos( hwnd, SB_CTL );
1252
1253     case SBM_SETRANGE16:
1254         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1255                           wParam  /* FIXME: Is this correct? */ );
1256         return 0;
1257
1258     case SBM_SETRANGE:
1259         {
1260             INT oldPos = GetScrollPos( hwnd, SB_CTL );
1261             SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1262             if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1263         }
1264         return 0;
1265
1266     case SBM_GETRANGE16:
1267         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1268         return 0;
1269
1270     case SBM_GETRANGE:
1271         GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1272         return 0;
1273
1274     case SBM_ENABLE_ARROWS16:
1275     case SBM_ENABLE_ARROWS:
1276         return EnableScrollBar( hwnd, SB_CTL, wParam );
1277
1278     case SBM_SETRANGEREDRAW:
1279         {
1280             INT oldPos = GetScrollPos( hwnd, SB_CTL );
1281             SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1282             if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1283         }
1284         return 0;
1285
1286     case SBM_SETSCROLLINFO:
1287         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1288
1289     case SBM_GETSCROLLINFO:
1290         return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1291
1292     case 0x00e5:
1293     case 0x00e7:
1294     case 0x00e8:
1295     case 0x00eb:
1296     case 0x00ec:
1297     case 0x00ed:
1298     case 0x00ee:
1299     case 0x00ef:
1300         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1301                     message, wParam, lParam );
1302         break;
1303
1304     default:
1305         if (message >= WM_USER)
1306             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1307                          message, wParam, lParam );
1308         return DefWindowProcW( hwnd, message, wParam, lParam );
1309     }
1310     return 0;
1311 }
1312
1313
1314 /*************************************************************************
1315  *           SetScrollInfo   (USER.475)
1316  */
1317 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1318                               BOOL16 bRedraw )
1319 {
1320     return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1321 }
1322
1323
1324 /*************************************************************************
1325  *           SetScrollInfo   (USER32.@)
1326  * SetScrollInfo can be used to set the position, upper bound,
1327  * lower bound, and page size of a scrollbar control.
1328  *
1329  * RETURNS
1330  *    Scrollbar position
1331  *
1332  * NOTE
1333  *    For 100 lines of text to be displayed in a window of 25 lines,
1334  *  one would for instance use info->nMin=0, info->nMax=75
1335  *  (corresponding to the 76 different positions of the window on
1336  *  the text), and info->nPage=25.
1337  */
1338 INT WINAPI SetScrollInfo(
1339 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1340 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1341 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1342 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1343 {
1344     INT action;
1345     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1346
1347     if( action & SA_SSI_HIDE )
1348         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1349     else
1350     {
1351         if( action & SA_SSI_SHOW )
1352             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1353                 return retVal; /* SetWindowPos() already did the painting */
1354
1355         if( bRedraw && (action & SA_SSI_REFRESH))
1356             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1357         else if( action & SA_SSI_REPAINT_ARROWS )
1358             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1359     }
1360     return retVal;
1361 }
1362
1363 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1364                             const SCROLLINFO *info, INT *action  )
1365 {
1366     /* Update the scrollbar state and set action flags according to
1367      * what has to be done graphics wise. */
1368
1369     SCROLLBAR_INFO *infoPtr;
1370     UINT new_flags;
1371     BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1372
1373    *action = 0;
1374
1375     if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1376     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1377     if ((info->cbSize != sizeof(*info)) &&
1378         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1379
1380     if (TRACE_ON(scroll))
1381     {
1382         TRACE("hwnd=%04x bar=%d", hwnd, nBar);
1383         if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1384         if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1385         if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1386         DPRINTF("\n");
1387     }
1388
1389     /* Set the page size */
1390
1391     if (info->fMask & SIF_PAGE)
1392     {
1393         if( infoPtr->Page != info->nPage )
1394         {
1395             infoPtr->Page = info->nPage;
1396            *action |= SA_SSI_REFRESH;
1397            bChangeParams = TRUE;
1398         }
1399     }
1400
1401     /* Set the scroll pos */
1402
1403     if (info->fMask & SIF_POS)
1404     {
1405         if( infoPtr->CurVal != info->nPos )
1406         {
1407             infoPtr->CurVal = info->nPos;
1408            *action |= SA_SSI_REFRESH;
1409         }
1410     }
1411
1412     /* Set the scroll range */
1413
1414     if (info->fMask & SIF_RANGE)
1415     {
1416         /* Invalid range -> range is set to (0,0) */
1417         if ((info->nMin > info->nMax) ||
1418             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1419         {
1420             infoPtr->MinVal = 0;
1421             infoPtr->MaxVal = 0;
1422             bChangeParams = TRUE;
1423         }
1424         else
1425         {
1426             if( infoPtr->MinVal != info->nMin ||
1427                 infoPtr->MaxVal != info->nMax )
1428             {
1429                 *action |= SA_SSI_REFRESH;
1430                 infoPtr->MinVal = info->nMin;
1431                 infoPtr->MaxVal = info->nMax;
1432                 bChangeParams = TRUE;
1433             }
1434         }
1435     }
1436
1437     /* Make sure the page size is valid */
1438
1439     if (infoPtr->Page < 0) infoPtr->Page = 0;
1440     else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1441         infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1442
1443     /* Make sure the pos is inside the range */
1444
1445     if (infoPtr->CurVal < infoPtr->MinVal)
1446         infoPtr->CurVal = infoPtr->MinVal;
1447     else if (infoPtr->CurVal > infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1448         infoPtr->CurVal = infoPtr->MaxVal - max( infoPtr->Page-1, 0 );
1449
1450     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1451                  infoPtr->Page, infoPtr->CurVal,
1452                  infoPtr->MinVal, infoPtr->MaxVal );
1453
1454     /* don't change the scrollbar state if SetScrollInfo
1455      * is just called with SIF_DISABLENOSCROLL
1456      */
1457     if(!(info->fMask & SIF_ALL)) goto done;
1458
1459     /* Check if the scrollbar should be hidden or disabled */
1460
1461     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1462     {
1463         new_flags = infoPtr->flags;
1464         if (infoPtr->MinVal >= infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1465         {
1466             /* Hide or disable scroll-bar */
1467             if (info->fMask & SIF_DISABLENOSCROLL)
1468             {
1469                 new_flags = ESB_DISABLE_BOTH;
1470                *action |= SA_SSI_REFRESH;
1471             }
1472             else if ((nBar != SB_CTL) && bChangeParams)
1473             {
1474                 *action = SA_SSI_HIDE;
1475                 goto done;
1476             }
1477         }
1478         else  /* Show and enable scroll-bar */
1479         {
1480             new_flags = 0;
1481             if ((nBar != SB_CTL) && bChangeParams)
1482                 *action |= SA_SSI_SHOW;
1483         }
1484
1485         if (infoPtr->flags != new_flags) /* check arrow flags */
1486         {
1487             infoPtr->flags = new_flags;
1488            *action |= SA_SSI_REPAINT_ARROWS;
1489         }
1490     }
1491
1492 done:
1493     /* Return current position */
1494
1495     return infoPtr->CurVal;
1496 }
1497
1498
1499 /*************************************************************************
1500  *           GetScrollInfo   (USER.476)
1501  */
1502 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1503 {
1504     return GetScrollInfo( hwnd, nBar, info );
1505 }
1506
1507
1508 /*************************************************************************
1509  *           GetScrollInfo   (USER32.@)
1510  * GetScrollInfo can be used to retrieve the position, upper bound,
1511  * lower bound, and page size of a scrollbar control.
1512  *
1513  * RETURNS STD
1514  */
1515 BOOL WINAPI GetScrollInfo(
1516   HWND hwnd /* [in] Handle of window */ ,
1517   INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1518   LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1519 {
1520     SCROLLBAR_INFO *infoPtr;
1521
1522     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1523     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1524     if ((info->cbSize != sizeof(*info)) &&
1525         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1526
1527     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1528     if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1529     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1530         info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1531     if (info->fMask & SIF_RANGE)
1532     {
1533         info->nMin = infoPtr->MinVal;
1534         info->nMax = infoPtr->MaxVal;
1535     }
1536     return (info->fMask & SIF_ALL) != 0;
1537 }
1538
1539
1540 /*************************************************************************
1541  *           SetScrollPos   (USER.62)
1542  */
1543 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1544                              BOOL16 bRedraw )
1545 {
1546     return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1547 }
1548
1549
1550 /*************************************************************************
1551  *           SetScrollPos   (USER32.@)
1552  *
1553  * RETURNS
1554  *    Success: Scrollbar position
1555  *    Failure: 0
1556  *
1557  * REMARKS
1558  *    Note the ambiguity when 0 is returned.  Use GetLastError
1559  *    to make sure there was an error (and to know which one).
1560  */
1561 INT WINAPI SetScrollPos(
1562 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1563 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1564 INT nPos /* [in] New value */,
1565 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1566 {
1567     SCROLLINFO info;
1568     SCROLLBAR_INFO *infoPtr;
1569     INT oldPos;
1570
1571     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1572     oldPos      = infoPtr->CurVal;
1573     info.cbSize = sizeof(info);
1574     info.nPos   = nPos;
1575     info.fMask  = SIF_POS;
1576     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1577     return oldPos;
1578 }
1579
1580
1581 /*************************************************************************
1582  *           GetScrollPos   (USER.63)
1583  */
1584 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1585 {
1586     return (INT16)GetScrollPos( hwnd, nBar );
1587 }
1588
1589
1590 /*************************************************************************
1591  *           GetScrollPos   (USER32.@)
1592  *
1593  * RETURNS
1594  *    Success: Current position
1595  *    Failure: 0
1596  *
1597  * REMARKS
1598  *    Note the ambiguity when 0 is returned.  Use GetLastError
1599  *    to make sure there was an error (and to know which one).
1600  */
1601 INT WINAPI GetScrollPos(
1602 HWND hwnd, /* [in] Handle of window */
1603 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1604 {
1605     SCROLLBAR_INFO *infoPtr;
1606
1607     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1608     return infoPtr->CurVal;
1609 }
1610
1611
1612 /*************************************************************************
1613  *           SetScrollRange   (USER.64)
1614  */
1615 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1616                               INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1617 {
1618     /* Invalid range -> range is set to (0,0) */
1619     if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1620     SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1621 }
1622
1623
1624 /*************************************************************************
1625  *           SetScrollRange   (USER32.@)
1626  *
1627  * RETURNS STD
1628  */
1629 BOOL WINAPI SetScrollRange(
1630 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1631 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1632 INT MinVal, /* [in] New minimum value */
1633 INT MaxVal, /* [in] New maximum value */
1634 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1635 {
1636     SCROLLINFO info;
1637
1638     info.cbSize = sizeof(info);
1639     info.nMin   = MinVal;
1640     info.nMax   = MaxVal;
1641     info.fMask  = SIF_RANGE;
1642     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1643     return TRUE;
1644 }
1645
1646
1647 /*************************************************************************
1648  *           SCROLL_SetNCSbState
1649  *
1650  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1651  */
1652 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1653                                        int hMin, int hMax, int hPos)
1654 {
1655     INT vA, hA;
1656     SCROLLINFO vInfo, hInfo;
1657
1658     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1659     vInfo.nMin   = vMin;         hInfo.nMin   = hMin;
1660     vInfo.nMax   = vMax;         hInfo.nMax   = hMax;
1661     vInfo.nPos   = vPos;         hInfo.nPos   = hPos;
1662     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1663
1664     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1665     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1666
1667     if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1668                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1669     {
1670         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1671         if( vA & SA_SSI_REFRESH )
1672             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1673
1674         if( hA & SA_SSI_REFRESH )
1675             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1676     }
1677     return 0;
1678 }
1679
1680
1681 /*************************************************************************
1682  *           GetScrollRange   (USER.65)
1683  */
1684 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1685                                 LPINT16 lpMin, LPINT16 lpMax)
1686 {
1687     INT min, max;
1688     BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1689     if (lpMin) *lpMin = min;
1690     if (lpMax) *lpMax = max;
1691     return ret;
1692 }
1693
1694
1695 /*************************************************************************
1696  *           GetScrollRange   (USER32.@)
1697  *
1698  * RETURNS STD
1699  */
1700 BOOL WINAPI GetScrollRange(
1701 HWND hwnd, /* [in] Handle of window */
1702 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL  */
1703 LPINT lpMin, /* [out] Where to store minimum value */
1704 LPINT lpMax /* [out] Where to store maximum value */)
1705 {
1706     SCROLLBAR_INFO *infoPtr;
1707
1708     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1709     {
1710         if (lpMin) lpMin = 0;
1711         if (lpMax) lpMax = 0;
1712         return FALSE;
1713     }
1714     if (lpMin) *lpMin = infoPtr->MinVal;
1715     if (lpMax) *lpMax = infoPtr->MaxVal;
1716     return TRUE;
1717 }
1718
1719
1720 /*************************************************************************
1721  *           SCROLL_ShowScrollBar()
1722  *
1723  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1724  */
1725 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1726                              BOOL fShowH, BOOL fShowV )
1727 {
1728     WND *wndPtr = WIN_FindWndPtr( hwnd );
1729     BOOL retvalue = FALSE;
1730
1731     if (!wndPtr) return FALSE;
1732     TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1733                     hwnd, nBar, fShowH, fShowV );
1734
1735     switch(nBar)
1736     {
1737     case SB_CTL:
1738         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1739         retvalue = TRUE;
1740         goto END;
1741
1742     case SB_BOTH:
1743     case SB_HORZ:
1744         if (fShowH)
1745         {
1746             fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1747             wndPtr->dwStyle |= WS_HSCROLL;
1748         }
1749         else  /* hide it */
1750         {
1751             fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1752             wndPtr->dwStyle &= ~WS_HSCROLL;
1753         }
1754         if( nBar == SB_HORZ ) {
1755             fShowV = FALSE;
1756             break;
1757         }
1758         /* fall through */
1759
1760     case SB_VERT:
1761         if (fShowV)
1762         {
1763             fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1764             wndPtr->dwStyle |= WS_VSCROLL;
1765         }
1766         else  /* hide it */
1767         {
1768             fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1769             wndPtr->dwStyle &= ~WS_VSCROLL;
1770         }
1771         if ( nBar == SB_VERT )
1772            fShowH = FALSE;
1773         break;
1774
1775     default:
1776         retvalue = FALSE;  /* Nothing to do! */
1777         goto END;
1778     }
1779
1780     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1781     {
1782         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1783                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1784         retvalue = TRUE;
1785         goto END;
1786     }
1787
1788     retvalue = FALSE; /* no frame changes */
1789 END:
1790     WIN_ReleaseWndPtr(wndPtr);
1791     return retvalue;
1792 }
1793
1794
1795 /*************************************************************************
1796  *           ShowScrollBar   (USER.267)
1797  */
1798 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1799 {
1800     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1801                                       (nBar == SB_HORZ) ? 0 : fShow );
1802 }
1803
1804
1805 /*************************************************************************
1806  *           ShowScrollBar   (USER32.@)
1807  *
1808  * RETURNS STD
1809  */
1810 BOOL WINAPI ShowScrollBar(
1811 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected   */
1812 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1813 BOOL fShow /* [in] TRUE = show, FALSE = hide  */)
1814 {
1815     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1816                                       (nBar == SB_HORZ) ? 0 : fShow );
1817     return TRUE;
1818 }
1819
1820
1821 /*************************************************************************
1822  *           EnableScrollBar   (USER.482)
1823  */
1824 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1825 {
1826     return EnableScrollBar( hwnd, nBar, flags );
1827 }
1828
1829
1830 /*************************************************************************
1831  *           EnableScrollBar   (USER32.@)
1832  */
1833 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1834 {
1835     BOOL bFineWithMe;
1836     SCROLLBAR_INFO *infoPtr;
1837
1838     TRACE("%04x %d %d\n", hwnd, nBar, flags );
1839
1840     flags &= ESB_DISABLE_BOTH;
1841
1842     if (nBar == SB_BOTH)
1843     {
1844         if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1845         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1846         {
1847             infoPtr->flags = flags;
1848             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1849         }
1850         nBar = SB_HORZ;
1851     }
1852     else
1853         bFineWithMe = TRUE;
1854
1855     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1856     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1857     infoPtr->flags = flags;
1858
1859     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1860     return TRUE;
1861 }