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