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 "wine/winuser16.h"
   9 #include "scroll.h"
  10 #include "heap.h"
  11 #include "win.h"
  12 #include "debugtools.h"
  13 #include "cache.h"
  14 #include "tweak.h"
  15
  16 DEFAULT_DEBUG_CHANNEL(scroll)
  17
  18
  19 static HBITMAP hUpArrow = 0;
  20 static HBITMAP hDnArrow = 0;
  21 static HBITMAP hLfArrow = 0;
  22 static HBITMAP hRgArrow = 0;
  23 static HBITMAP hUpArrowD = 0;
  24 static HBITMAP hDnArrowD = 0;
  25 static HBITMAP hLfArrowD = 0;
  26 static HBITMAP hRgArrowD = 0;
  27 static HBITMAP hUpArrowI = 0;
  28 static HBITMAP hDnArrowI = 0;
  29 static HBITMAP hLfArrowI = 0;
  30 static HBITMAP hRgArrowI = 0;
  31
  32 #define TOP_ARROW(flags,pressed) \
  33    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  34 #define BOTTOM_ARROW(flags,pressed) \
  35    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  36 #define LEFT_ARROW(flags,pressed) \
  37    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  38 #define RIGHT_ARROW(flags,pressed) \
  39    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  40
  41
  42   /* Minimum size of the rectangle between the arrows */
  43 #define SCROLL_MIN_RECT  4
  44
  45   /* Minimum size of the thumb in pixels */
  46 #define SCROLL_MIN_THUMB 6
  47
  48   /* Overlap between arrows and thumb */
  49 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
  50
  51   /* Delay (in ms) before first repetition when holding the button down */
  52 #define SCROLL_FIRST_DELAY   200
  53
  54   /* Delay (in ms) between scroll repetitions */
  55 #define SCROLL_REPEAT_DELAY  50
  56
  57   /* Scroll timer id */
  58 #define SCROLL_TIMER   0
  59
  60   /* Scroll-bar hit testing */
  61 enum SCROLL_HITTEST
  62 {
  63     SCROLL_NOWHERE,      /* Outside the scroll bar */
  64     SCROLL_TOP_ARROW,    /* Top or left arrow */
  65     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  66     SCROLL_THUMB,        /* Thumb rectangle */
  67     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  68     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  69 };
  70
  71  /* What to do after SCROLL_SetScrollInfo() */
  72 #define SA_SSI_HIDE             0x0001
  73 #define SA_SSI_SHOW             0x0002
  74 #define SA_SSI_REFRESH          0x0004
  75 #define SA_SSI_REPAINT_ARROWS   0x0008
  76
  77  /* Thumb-tracking info */
  78 static HWND SCROLL_TrackingWin = 0;
  79 static INT  SCROLL_TrackingBar = 0;
  80 static INT  SCROLL_TrackingPos = 0;
  81 static INT  SCROLL_TrackingVal = 0;
  82  /* Hit test code of the last button-down event */
  83 static enum SCROLL_HITTEST SCROLL_trackHitTest;
  84 static BOOL SCROLL_trackVertical;
  85
  86  /* Is the moving thumb being displayed? */
  87 static BOOL SCROLL_MovingThumb = FALSE;
  88
  89  /* Local functions */
  90 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
  91                                     BOOL fShowH, BOOL fShowV );
  92 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
  93                                    const SCROLLINFO *info, INT *action );
  94 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
  95                                     RECT *rect, INT arrowSize,
  96                                     INT thumbSize, INT thumbPos,
  97                                     UINT flags, BOOL vertical,
  98                                     BOOL top_selected, BOOL bottom_selected );
  99
 100
 101 /***********************************************************************
 102  *           SCROLL_LoadBitmaps
 103  */
 104 static void SCROLL_LoadBitmaps(void)
 105 {
 106     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 107     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 108     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 109     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 110     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 111     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 112     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 113     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 114     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 115     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 116     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 117     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 118 }
 119
 120
 121 /***********************************************************************
 122  *           SCROLL_GetPtrScrollInfo
 123  */
 124 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
 125 {
 126     SCROLLBAR_INFO *infoPtr;
 127
 128     if (!wndPtr) return NULL;
 129     switch(nBar)
 130     {
 131         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 132         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 133         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 134         default:      return NULL;
 135     }
 136
 137     if (!infoPtr)  /* Create the info structure if needed */
 138     {
 139         if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
 140         {
 141             infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
 142             infoPtr->MaxVal = 100;
 143             infoPtr->flags  = ESB_ENABLE_BOTH;
 144             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 145             else wndPtr->pVScroll = infoPtr;
 146         }
 147         if (!hUpArrow) SCROLL_LoadBitmaps();
 148     }
 149     return infoPtr;
 150 }
 151
 152
 153 /***********************************************************************
 154  *           SCROLL_GetScrollInfo
 155  */
 156 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
 157 {
 158    SCROLLBAR_INFO *retvalue;
 159    WND *wndPtr = WIN_FindWndPtr( hwnd );
 160    retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 161    WIN_ReleaseWndPtr(wndPtr);
 162    return retvalue;
 163 }
 164
 165
 166 /***********************************************************************
 167  *           SCROLL_GetScrollBarRect
 168  *
 169  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 170  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 171  * 'arrowSize' returns the width or height of an arrow (depending on
 172  * the orientation of the scrollbar), 'thumbSize' returns the size of
 173  * the thumb, and 'thumbPos' returns the position of the thumb
 174  * relative to the left or to the top.
 175  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 176  */
 177 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 178                                        INT *arrowSize, INT *thumbSize,
 179                                        INT *thumbPos )
 180 {
 181     INT pixels;
 182     BOOL vertical;
 183     WND *wndPtr = WIN_FindWndPtr( hwnd );
 184
 185     switch(nBar)
 186     {
 187       case SB_HORZ:
 188         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 189         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 190         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 191         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 192         if(wndPtr->dwStyle & WS_BORDER) {
 193           lprect->left--;
 194           lprect->right++;
 195         } else if(wndPtr->dwStyle & WS_VSCROLL)
 196           lprect->right++;
 197         vertical = FALSE;
 198         break;
 199
 200       case SB_VERT:
 201         lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 202         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 203         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 204         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 205         if(wndPtr->dwStyle & WS_BORDER) {
 206           lprect->top--;
 207           lprect->bottom++;
 208         } else if(wndPtr->dwStyle & WS_HSCROLL)
 209           lprect->bottom++;
 210         vertical = TRUE;
 211         break;
 212
 213       case SB_CTL:
 214         GetClientRect( hwnd, lprect );
 215         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 216         break;
 217
 218     default:
 219         WIN_ReleaseWndPtr(wndPtr);
 220         return FALSE;
 221     }
 222
 223     if (vertical) pixels = lprect->bottom - lprect->top;
 224     else pixels = lprect->right - lprect->left;
 225
 226     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 227     {
 228         if (pixels > SCROLL_MIN_RECT)
 229             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 230         else
 231             *arrowSize = 0;
 232         *thumbPos = *thumbSize = 0;
 233     }
 234     else
 235     {
 236         SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 237
 238         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 239         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 240
 241         if (info->Page)
 242         {
 243             *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
 244             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 245         }
 246         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 247
 248         if (((pixels -= *thumbSize ) < 0) ||
 249             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 250         {
 251             /* Rectangle too small or scrollbar disabled -> no thumb */
 252             *thumbPos = *thumbSize = 0;
 253         }
 254         else
 255         {
 256             INT max = info->MaxVal - MAX( info->Page-1, 0 );
 257             if (info->MinVal >= max)
 258                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 259             else
 260                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 261                  + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
 262         }
 263     }
 264     WIN_ReleaseWndPtr(wndPtr);
 265     return vertical;
 266 }
 267
 268
 269 /***********************************************************************
 270  *           SCROLL_GetThumbVal
 271  *
 272  * Compute the current scroll position based on the thumb position in pixels
 273  * from the top of the scroll-bar.
 274  */
 275 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 276                                   BOOL vertical, INT pos )
 277 {
 278     INT thumbSize;
 279     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 280
 281     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 282         return infoPtr->MinVal;
 283
 284     if (infoPtr->Page)
 285     {
 286         thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
 287         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 288     }
 289     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 290
 291     if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
 292
 293     pos = MAX( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 294     if (pos > pixels) pos = pixels;
 295
 296     if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
 297     else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
 298     return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
 299 }
 300
 301 /***********************************************************************
 302  *           SCROLL_PtInRectEx
 303  */
 304 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 305 {
 306     RECT rect = *lpRect;
 307
 308     if (vertical)
 309     {
 310         rect.left -= lpRect->right - lpRect->left;
 311         rect.right += lpRect->right - lpRect->left;
 312     }
 313     else
 314     {
 315         rect.top -= lpRect->bottom - lpRect->top;
 316         rect.bottom += lpRect->bottom - lpRect->top;
 317     }
 318     return PtInRect( &rect, pt );
 319 }
 320
 321 /***********************************************************************
 322  *           SCROLL_ClipPos
 323  */
 324 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 325 {
 326     if( pt.x < lpRect->left )
 327         pt.x = lpRect->left;
 328     else
 329     if( pt.x > lpRect->right )
 330         pt.x = lpRect->right;
 331
 332     if( pt.y < lpRect->top )
 333         pt.y = lpRect->top;
 334     else
 335     if( pt.y > lpRect->bottom )
 336         pt.y = lpRect->bottom;
 337
 338     return pt;
 339 }
 340
 341
 342 /***********************************************************************
 343  *           SCROLL_HitTest
 344  *
 345  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 346  */
 347 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 348                                            POINT pt, BOOL bDragging )
 349 {
 350     INT arrowSize, thumbSize, thumbPos;
 351     RECT rect;
 352
 353     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 354                                            &arrowSize, &thumbSize, &thumbPos );
 355
 356     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 357          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 358
 359     if (vertical)
 360     {
 361         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 362         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 363         if (!thumbPos) return SCROLL_TOP_RECT;
 364         pt.y -= rect.top;
 365         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 366         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 367     }
 368     else  /* horizontal */
 369     {
 370         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 371         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 372         if (!thumbPos) return SCROLL_TOP_RECT;
 373         pt.x -= rect.left;
 374         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 375         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 376     }
 377     return SCROLL_THUMB;
 378 }
 379
 380
 381 /***********************************************************************
 382  *           SCROLL_DrawArrows
 383  *
 384  * Draw the scroll bar arrows.
 385  */
 386 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
 387                                   RECT *rect, INT arrowSize, BOOL vertical,
 388                                   BOOL top_pressed, BOOL bottom_pressed )
 389 {
 390   RECT r;
 391
 392   r = *rect;
 393   if( vertical )
 394     r.bottom = r.top + arrowSize;
 395   else
 396     r.right = r.left + arrowSize;
 397
 398   DrawFrameControl( hdc, &r, DFC_SCROLL,
 399                     (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
 400                     | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 401                     | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
 402
 403   r = *rect;
 404   if( vertical )
 405     r.top = r.bottom-arrowSize;
 406   else
 407     r.left = r.right-arrowSize;
 408
 409   DrawFrameControl( hdc, &r, DFC_SCROLL,
 410                     (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
 411                     | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 412                     | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
 413 }
 414
 415 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
 416                                   RECT *rect, INT arrowSize, BOOL vertical,
 417                                   BOOL top_pressed, BOOL bottom_pressed )
 418 {
 419     HDC hdcMem = CreateCompatibleDC( hdc );
 420     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 421                                     TOP_ARROW(infoPtr->flags, top_pressed)
 422                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 423
 424     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 425     StretchBlt( hdc, rect->left, rect->top,
 426                   vertical ? rect->right-rect->left : arrowSize,
 427                   vertical ? arrowSize : rect->bottom-rect->top,
 428                   hdcMem, 0, 0,
 429                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 430                   SRCCOPY );
 431
 432     SelectObject( hdcMem, vertical ?
 433                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 434                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 435     if (vertical)
 436         StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
 437                       rect->right - rect->left, arrowSize,
 438                       hdcMem, 0, 0,
 439                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 440                       SRCCOPY );
 441     else
 442         StretchBlt( hdc, rect->right - arrowSize, rect->top,
 443                       arrowSize, rect->bottom - rect->top,
 444                       hdcMem, 0, 0,
 445                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 446                       SRCCOPY );
 447     SelectObject( hdcMem, hbmpPrev );
 448     DeleteDC( hdcMem );
 449 }
 450
 451 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 452                                RECT *rect, INT arrowSize, BOOL vertical,
 453                                BOOL top_pressed, BOOL bottom_pressed )
 454 {
 455   if( TWEAK_WineLook == WIN31_LOOK )
 456     SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
 457                           vertical, top_pressed,bottom_pressed );
 458   else
 459     SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
 460                           vertical, top_pressed,bottom_pressed );
 461 }
 462
 463
 464 /***********************************************************************
 465  *           SCROLL_DrawMovingThumb
 466  *
 467  * Draw the moving thumb rectangle.
 468  */
 469 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
 470                                        INT arrowSize, INT thumbSize )
 471 {
 472     RECT r = *rect;
 473     if (vertical)
 474     {
 475         r.top += SCROLL_TrackingPos;
 476         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 477             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 478         if (r.top + thumbSize >
 479                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 480             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 481                                                                   - thumbSize;
 482         r.bottom = r.top + thumbSize;
 483     }
 484     else
 485     {
 486         r.left += SCROLL_TrackingPos;
 487         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 488             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 489         if (r.left + thumbSize >
 490                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 491             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 492                                                                   - thumbSize;
 493         r.right = r.left + thumbSize;
 494     }
 495
 496     DrawFocusRect( hdc, &r );
 497     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 498 }
 499
 500 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
 501                                        INT arrowSize, INT thumbSize )
 502 {
 503   INT pos = SCROLL_TrackingPos;
 504   INT max_size;
 505
 506   if( vertical )
 507     max_size = rect->bottom - rect->top;
 508   else
 509     max_size = rect->right - rect->left;
 510
 511   max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
 512
 513   if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
 514     pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
 515   else if( pos > max_size )
 516     pos = max_size;
 517
 518   SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
 519                           rect, arrowSize, thumbSize, pos,
 520                           0, vertical, FALSE, FALSE );
 521
 522   SCROLL_MovingThumb = !SCROLL_MovingThumb;
 523 }
 524
 525 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 526                                     INT arrowSize, INT thumbSize )
 527 {
 528   if( TWEAK_WineLook == WIN31_LOOK )
 529     SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
 530   else
 531     SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
 532 }
 533
 534 /***********************************************************************
 535  *           SCROLL_DrawInterior
 536  *
 537  * Draw the scroll bar interior (everything except the arrows).
 538  */
 539 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 540                                     RECT *rect, INT arrowSize,
 541                                     INT thumbSize, INT thumbPos,
 542                                     UINT flags, BOOL vertical,
 543                                     BOOL top_selected, BOOL bottom_selected )
 544 {
 545     RECT r;
 546     HPEN hSavePen;
 547     HBRUSH hSaveBrush,hBrush;
 548
 549     /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 550      * The window-owned scrollbars need to call DEFWND_ControlColor
 551      * to correctly setup default scrollbar colors
 552      */
 553     if (nBar == SB_CTL)
 554     {
 555       hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 556                                      (WPARAM)hdc,(LPARAM)hwnd);
 557     }
 558     else
 559     {
 560       hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 561     }
 562
 563     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 564     hSaveBrush = SelectObject( hdc, hBrush );
 565
 566     /* Calculate the scroll rectangle */
 567     r = *rect;
 568     if (vertical)
 569     {
 570         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 571         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 572     }
 573     else
 574     {
 575         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 576         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 577     }
 578
 579     /* Draw the scroll rectangles and thumb */
 580     if (!thumbPos)  /* No thumb to draw */
 581     {
 582         PatBlt( hdc, r.left, r.top,
 583                      r.right - r.left, r.bottom - r.top,
 584                      PATCOPY );
 585
 586         /* cleanup and return */
 587         SelectObject( hdc, hSavePen );
 588         SelectObject( hdc, hSaveBrush );
 589         return;
 590     }
 591
 592     if (vertical)
 593     {
 594         PatBlt( hdc, r.left, r.top,
 595                   r.right - r.left,
 596                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 597                   top_selected ? 0x0f0000 : PATCOPY );
 598         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 599         PatBlt( hdc, r.left, r.top + thumbSize,
 600                   r.right - r.left,
 601                   r.bottom - r.top - thumbSize,
 602                   bottom_selected ? 0x0f0000 : PATCOPY );
 603         r.bottom = r.top + thumbSize;
 604     }
 605     else  /* horizontal */
 606     {
 607         PatBlt( hdc, r.left, r.top,
 608                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 609                   r.bottom - r.top,
 610                   top_selected ? 0x0f0000 : PATCOPY );
 611         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 612         PatBlt( hdc, r.left + thumbSize, r.top,
 613                   r.right - r.left - thumbSize,
 614                   r.bottom - r.top,
 615                   bottom_selected ? 0x0f0000 : PATCOPY );
 616         r.right = r.left + thumbSize;
 617     }
 618
 619     /* Draw the thumb */
 620     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE  );
 621
 622     /* cleanup */
 623     SelectObject( hdc, hSavePen );
 624     SelectObject( hdc, hSaveBrush );
 625 }
 626
 627
 628 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 629                                  RECT *rect, INT arrowSize,
 630                                  INT thumbSize, INT thumbPos,
 631                                  UINT flags, BOOL vertical,
 632                                  BOOL top_selected, BOOL bottom_selected )
 633 {
 634     RECT r;
 635     HPEN hSavePen;
 636     HBRUSH hSaveBrush,hBrush;
 637     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 638
 639     if (Save_SCROLL_MovingThumb &&
 640         (SCROLL_TrackingWin == hwnd) &&
 641         (SCROLL_TrackingBar == nBar))
 642         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 643
 644       /* Select the correct brush and pen */
 645
 646     if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 647     {
 648         /* This ought to be the color of the parent window */
 649         if (TWEAK_WineLook == WIN31_LOOK) {
 650             hBrush = GetSysColorBrush(COLOR_WINDOW);
 651         } else {
 652             /* Under Win9x look & feel, scrollbars don't have a solid border.
 653              * To make scrollbar's background different from the window
 654              * background, we need to apply a gray 0x55aa pattern brush.
 655              * Otherwise it won't look good.
 656              */
 657             hBrush = CACHE_GetPattern55AABrush();
 658        }
 659     }
 660     else
 661     {
 662         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 663          * The window-owned scrollbars need to call DEFWND_ControlColor
 664          * to correctly setup default scrollbar colors
 665          */
 666         if (nBar == SB_CTL) {
 667             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 668                                            (WPARAM)hdc,(LPARAM)hwnd);
 669         } else {
 670             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 671         }
 672     }
 673     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 674     hSaveBrush = SelectObject( hdc, hBrush );
 675
 676       /* Calculate the scroll rectangle */
 677
 678     r = *rect;
 679     if (vertical)
 680     {
 681         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 682         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 683     }
 684     else
 685     {
 686         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 687         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 688     }
 689
 690       /* Draw the scroll bar frame */
 691
 692         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 693     if (TWEAK_WineLook == WIN31_LOOK)
 694         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 695
 696       /* Draw the scroll rectangles and thumb */
 697
 698     if (!thumbPos)  /* No thumb to draw */
 699     {
 700         INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
 701
 702         PatBlt( hdc, r.left+offset, r.top+offset,
 703                      r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
 704                      PATCOPY );
 705
 706         /* cleanup and return */
 707         SelectObject( hdc, hSavePen );
 708         SelectObject( hdc, hSaveBrush );
 709         return;
 710     }
 711
 712     if (vertical)
 713     {
 714         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 715
 716         PatBlt( hdc, r.left + offset, r.top + offset,
 717                   r.right - r.left - offset*2,
 718                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
 719                   top_selected ? 0x0f0000 : PATCOPY );
 720         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 721         PatBlt( hdc, r.left + offset, r.top + thumbSize,
 722                   r.right - r.left - offset*2,
 723                   r.bottom - r.top - thumbSize - offset,
 724                   bottom_selected ? 0x0f0000 : PATCOPY );
 725         r.bottom = r.top + thumbSize;
 726     }
 727     else  /* horizontal */
 728     {
 729         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 730
 731         PatBlt( hdc, r.left + offset, r.top + offset,
 732                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 733                   r.bottom - r.top - offset*2,
 734                   top_selected ? 0x0f0000 : PATCOPY );
 735         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 736         PatBlt( hdc, r.left + thumbSize, r.top + offset,
 737                   r.right - r.left - thumbSize - offset,
 738                   r.bottom - r.top - offset*2,
 739                   bottom_selected ? 0x0f0000 : PATCOPY );
 740         r.right = r.left + thumbSize;
 741     }
 742
 743       /* Draw the thumb */
 744
 745     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 746     if (TWEAK_WineLook == WIN31_LOOK)
 747     {
 748         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 749         r.top++, r.left++;
 750     }
 751     else
 752     {
 753         Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
 754     }
 755     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 756
 757     if (Save_SCROLL_MovingThumb &&
 758         (SCROLL_TrackingWin == hwnd) &&
 759         (SCROLL_TrackingBar == nBar))
 760         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 761
 762     /* cleanup */
 763     SelectObject( hdc, hSavePen );
 764     SelectObject( hdc, hSaveBrush );
 765 }
 766
 767
 768 /***********************************************************************
 769  *           SCROLL_DrawScrollBar
 770  *
 771  * Redraw the whole scrollbar.
 772  */
 773 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 774                            BOOL arrows, BOOL interior )
 775 {
 776     INT arrowSize, thumbSize, thumbPos;
 777     RECT rect;
 778     BOOL vertical;
 779     WND *wndPtr = WIN_FindWndPtr( hwnd );
 780     SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 781     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 782
 783     if (!wndPtr || !infoPtr ||
 784         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 785         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 786     if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
 787
 788     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 789                                         &arrowSize, &thumbSize, &thumbPos );
 790
 791     if (Save_SCROLL_MovingThumb &&
 792         (SCROLL_TrackingWin == hwnd) &&
 793         (SCROLL_TrackingBar == nBar))
 794         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 795
 796       /* Draw the arrows */
 797
 798     if (arrows && arrowSize)
 799     {
 800         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 801             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 802                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 803                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 804         else
 805             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 806                                                                FALSE, FALSE );
 807     }
 808     if( interior )
 809         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 810                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 811
 812     if (Save_SCROLL_MovingThumb &&
 813         (SCROLL_TrackingWin == hwnd) &&
 814         (SCROLL_TrackingBar == nBar))
 815         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 816
 817 END:
 818     WIN_ReleaseWndPtr(wndPtr);
 819 }
 820
 821
 822 /***********************************************************************
 823  *           SCROLL_RefreshScrollBar
 824  *
 825  * Repaint the scroll bar interior after a SetScrollRange() or
 826  * SetScrollPos() call.
 827  */
 828 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 829                                      BOOL arrows, BOOL interior )
 830 {
 831     HDC hdc = GetDCEx( hwnd, 0,
 832                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 833     if (!hdc) return;
 834
 835     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 836     ReleaseDC( hwnd, hdc );
 837 }
 838
 839
 840 /***********************************************************************
 841  *           SCROLL_HandleKbdEvent
 842  *
 843  * Handle a keyboard event (only for SB_CTL scrollbars).
 844  */
 845 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
 846 {
 847     WND *wndPtr = WIN_FindWndPtr( hwnd );
 848     WPARAM msg;
 849
 850     switch(wParam)
 851     {
 852     case VK_PRIOR: msg = SB_PAGEUP; break;
 853     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 854     case VK_HOME:  msg = SB_TOP; break;
 855     case VK_END:   msg = SB_BOTTOM; break;
 856     case VK_UP:    msg = SB_LINEUP; break;
 857     case VK_DOWN:  msg = SB_LINEDOWN; break;
 858     default:
 859         WIN_ReleaseWndPtr(wndPtr);
 860         return;
 861     }
 862     SendMessageA( GetParent(hwnd),
 863                     (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 864                     msg, hwnd );
 865     WIN_ReleaseWndPtr(wndPtr);
 866 }
 867
 868
 869 /***********************************************************************
 870  *           SCROLL_HandleScrollEvent
 871  *
 872  * Handle a mouse or timer event for the scrollbar.
 873  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 874  * windows coordinates.
 875  */
 876 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 877 {
 878       /* Previous mouse position for timer events */
 879     static POINT prevPt;
 880       /* Thumb position when tracking started. */
 881     static UINT trackThumbPos;
 882       /* Position in the scroll-bar of the last button-down event. */
 883     static INT lastClickPos;
 884       /* Position in the scroll-bar of the last mouse event. */
 885     static INT lastMousePos;
 886
 887     enum SCROLL_HITTEST hittest;
 888     HWND hwndOwner, hwndCtl;
 889     BOOL vertical;
 890     INT arrowSize, thumbSize, thumbPos;
 891     RECT rect;
 892     HDC hdc;
 893
 894     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 895     if (!infoPtr) return;
 896     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 897                   return;
 898
 899     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 900     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 901                                         &arrowSize, &thumbSize, &thumbPos );
 902     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 903     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 904
 905     switch(msg)
 906     {
 907       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 908           SCROLL_trackVertical = vertical;
 909           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 910           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 911           lastMousePos  = lastClickPos;
 912           trackThumbPos = thumbPos;
 913           prevPt = pt;
 914           SetCapture( hwnd );
 915           if (nBar == SB_CTL) SetFocus( hwnd );
 916           break;
 917
 918       case WM_MOUSEMOVE:
 919           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 920           prevPt = pt;
 921           break;
 922
 923       case WM_LBUTTONUP:
 924           hittest = SCROLL_NOWHERE;
 925           ReleaseCapture();
 926           break;
 927
 928       case WM_SYSTIMER:
 929           pt = prevPt;
 930           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 931           break;
 932
 933       default:
 934           return;  /* Should never happen */
 935     }
 936
 937     TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
 938                  hwnd, nBar, msg, pt.x, pt.y, hittest );
 939
 940     switch(SCROLL_trackHitTest)
 941     {
 942     case SCROLL_NOWHERE:  /* No tracking in progress */
 943         break;
 944
 945     case SCROLL_TOP_ARROW:
 946         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 947                            (hittest == SCROLL_trackHitTest), FALSE );
 948         if (hittest == SCROLL_trackHitTest)
 949         {
 950             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 951             {
 952                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 953                                 SB_LINEUP, hwndCtl );
 954             }
 955
 956             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 957                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 958                             (TIMERPROC)0 );
 959         }
 960         else KillSystemTimer( hwnd, SCROLL_TIMER );
 961         break;
 962
 963     case SCROLL_TOP_RECT:
 964         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 965                              thumbPos, infoPtr->flags, vertical,
 966                              (hittest == SCROLL_trackHitTest), FALSE );
 967         if (hittest == SCROLL_trackHitTest)
 968         {
 969             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 970             {
 971                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 972                                 SB_PAGEUP, hwndCtl );
 973                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 974                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 975                                   (TIMERPROC)0 );
 976             }
 977         }
 978         else KillSystemTimer( hwnd, SCROLL_TIMER );
 979         break;
 980
 981     case SCROLL_THUMB:
 982         if (msg == WM_LBUTTONDOWN)
 983         {
 984             SCROLL_TrackingWin = hwnd;
 985             SCROLL_TrackingBar = nBar;
 986             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
 987             if (!SCROLL_MovingThumb)
 988                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
 989         }
 990         else if (msg == WM_LBUTTONUP)
 991         {
 992             if (SCROLL_MovingThumb)
 993                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
 994             SCROLL_TrackingWin = 0;
 995             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 996                                  thumbPos, infoPtr->flags, vertical,
 997                                  FALSE, FALSE );
 998         }
 999         else  /* WM_MOUSEMOVE */
1000         {
1001             UINT pos;
1002
1003             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1004             else
1005             {
1006                 pt = SCROLL_ClipPos( &rect, pt );
1007                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1008             }
1009             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1010             {
1011                 if (SCROLL_MovingThumb)
1012                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1013                                         arrowSize, thumbSize );
1014                 lastMousePos = pos;
1015                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1016                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1017                                                          vertical,
1018                                                          SCROLL_TrackingPos );
1019                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1020                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1021                                 hwndCtl );
1022                 if (!SCROLL_MovingThumb)
1023                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1024                                         arrowSize, thumbSize );
1025             }
1026         }
1027         break;
1028
1029     case SCROLL_BOTTOM_RECT:
1030         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1031                              thumbPos, infoPtr->flags, vertical,
1032                              FALSE, (hittest == SCROLL_trackHitTest) );
1033         if (hittest == SCROLL_trackHitTest)
1034         {
1035             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1036             {
1037                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1038                                 SB_PAGEDOWN, hwndCtl );
1039                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1040                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1041                                   (TIMERPROC)0 );
1042             }
1043         }
1044         else KillSystemTimer( hwnd, SCROLL_TIMER );
1045         break;
1046
1047     case SCROLL_BOTTOM_ARROW:
1048         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1049                            FALSE, (hittest == SCROLL_trackHitTest) );
1050         if (hittest == SCROLL_trackHitTest)
1051         {
1052             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1053             {
1054                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1055                                 SB_LINEDOWN, hwndCtl );
1056             }
1057
1058             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1059                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1060                             (TIMERPROC)0 );
1061         }
1062         else KillSystemTimer( hwnd, SCROLL_TIMER );
1063         break;
1064     }
1065
1066     if (msg == WM_LBUTTONUP)
1067     {
1068         hittest = SCROLL_trackHitTest;
1069         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
1070
1071         if (hittest == SCROLL_THUMB)
1072         {
1073             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1074                                  trackThumbPos + lastMousePos - lastClickPos );
1075             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1076                             MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
1077         }
1078         else
1079             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1080                             SB_ENDSCROLL, hwndCtl );
1081     }
1082
1083     ReleaseDC( hwnd, hdc );
1084 }
1085
1086
1087 /***********************************************************************
1088  *           ScrollBarWndProc
1089  */
1090 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
1091                                  LPARAM lParam )
1092 {
1093     switch(message)
1094     {
1095     case WM_CREATE:
1096         {
1097             CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
1098             if (lpCreat->style & SBS_SIZEBOX)
1099             {
1100                 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1101                 return 0;
1102             }
1103
1104             if (lpCreat->style & SBS_VERT)
1105             {
1106                 if (lpCreat->style & SBS_LEFTALIGN)
1107                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1108                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1109                 else if (lpCreat->style & SBS_RIGHTALIGN)
1110                     MoveWindow( hwnd,
1111                                   lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1112                                   lpCreat->y,
1113                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1114             }
1115             else  /* SBS_HORZ */
1116             {
1117                 if (lpCreat->style & SBS_TOPALIGN)
1118                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1119                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1120                 else if (lpCreat->style & SBS_BOTTOMALIGN)
1121                     MoveWindow( hwnd,
1122                                   lpCreat->x,
1123                                   lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1124                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1125             }
1126         }
1127         if (!hUpArrow) SCROLL_LoadBitmaps();
1128         TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1129         return 0;
1130
1131     case WM_LBUTTONDOWN:
1132     case WM_LBUTTONUP:
1133     case WM_MOUSEMOVE:
1134     case WM_SYSTIMER:
1135         {
1136             POINT pt;
1137             CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
1138             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1139         }
1140         break;
1141
1142     case WM_KEYDOWN:
1143         SCROLL_HandleKbdEvent( hwnd, wParam );
1144         break;
1145
1146     case WM_ERASEBKGND:
1147          return 1;
1148
1149     case WM_GETDLGCODE:
1150          return DLGC_WANTARROWS; /* Windows returns this value */
1151
1152     case WM_PAINT:
1153         {
1154             PAINTSTRUCT ps;
1155             HDC hdc = BeginPaint( hwnd, &ps );
1156             SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1157             EndPaint( hwnd, &ps );
1158         }
1159         break;
1160
1161     case SBM_SETPOS16:
1162     case SBM_SETPOS:
1163         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1164
1165     case SBM_GETPOS16:
1166     case SBM_GETPOS:
1167         return GetScrollPos( hwnd, SB_CTL );
1168
1169     case SBM_SETRANGE16:
1170         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1171                           wParam  /* FIXME: Is this correct? */ );
1172         return 0;
1173
1174     case SBM_SETRANGE:
1175         SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1176         return 0;  /* FIXME: return previous position */
1177
1178     case SBM_GETRANGE16:
1179         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1180         return 0;
1181
1182     case SBM_GETRANGE:
1183         GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1184         return 0;
1185
1186     case SBM_ENABLE_ARROWS16:
1187     case SBM_ENABLE_ARROWS:
1188         return EnableScrollBar( hwnd, SB_CTL, wParam );
1189
1190     case SBM_SETRANGEREDRAW:
1191         SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1192         return 0;  /* FIXME: return previous position */
1193
1194     case SBM_SETSCROLLINFO:
1195         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1196
1197     case SBM_GETSCROLLINFO:
1198         return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1199
1200     case 0x00e5:
1201     case 0x00e7:
1202     case 0x00e8:
1203     case 0x00eb:
1204     case 0x00ec:
1205     case 0x00ed:
1206     case 0x00ee:
1207     case 0x00ef:
1208         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1209                     message, wParam, lParam );
1210         break;
1211
1212     default:
1213         if (message >= WM_USER)
1214             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1215                          message, wParam, lParam );
1216         return DefWindowProcA( hwnd, message, wParam, lParam );
1217     }
1218     return 0;
1219 }
1220
1221
1222 /*************************************************************************
1223  *           SetScrollInfo16   (USER.475)
1224  */
1225 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1226                               BOOL16 bRedraw )
1227 {
1228     return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1229 }
1230
1231
1232 /*************************************************************************
1233  *           SetScrollInfo32   (USER32.501)
1234  * SetScrollInfo32 can be used to set the position, upper bound,
1235  * lower bound, and page size of a scrollbar control.
1236  *
1237  * RETURNS
1238  *    Scrollbar position
1239  *
1240  * NOTE
1241  *    For 100 lines of text to be displayed in a window of 25 lines,
1242  *  one would for instance use info->nMin=0, info->nMax=75
1243  *  (corresponding to the 76 different positions of the window on
1244  *  the text), and info->nPage=25.
1245  */
1246 INT WINAPI SetScrollInfo(
1247 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1248 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1249 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1250 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1251 {
1252     INT action;
1253     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1254
1255     if( action & SA_SSI_HIDE )
1256         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1257     else
1258     {
1259         if( action & SA_SSI_SHOW )
1260             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1261                 return retVal; /* SetWindowPos() already did the painting */
1262
1263         if( bRedraw && (action & SA_SSI_REFRESH))
1264             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1265         else if( action & SA_SSI_REPAINT_ARROWS )
1266             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1267     }
1268     return retVal;
1269 }
1270
1271 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1272                             const SCROLLINFO *info, INT *action  )
1273 {
1274     /* Update the scrollbar state and set action flags according to
1275      * what has to be done graphics wise. */
1276
1277     SCROLLBAR_INFO *infoPtr;
1278     UINT new_flags;
1279
1280    *action = 0;
1281
1282     if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1283     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1284     if ((info->cbSize != sizeof(*info)) &&
1285         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1286
1287     if (TRACE_ON(scroll))
1288     {
1289         DPRINTF( "hwnd=%04x bar=%d", hwnd, nBar);
1290         if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1291         if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1292         if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1293         DPRINTF("\n");
1294     }
1295
1296     /* Set the page size */
1297
1298     if (info->fMask & SIF_PAGE)
1299     {
1300         if( infoPtr->Page != info->nPage )
1301         {
1302             infoPtr->Page = info->nPage;
1303            *action |= SA_SSI_REFRESH;
1304         }
1305     }
1306
1307     /* Set the scroll pos */
1308
1309     if (info->fMask & SIF_POS)
1310     {
1311         if( infoPtr->CurVal != info->nPos )
1312         {
1313             infoPtr->CurVal = info->nPos;
1314            *action |= SA_SSI_REFRESH;
1315         }
1316     }
1317
1318     /* Set the scroll range */
1319
1320     if (info->fMask & SIF_RANGE)
1321     {
1322         /* Invalid range -> range is set to (0,0) */
1323         if ((info->nMin > info->nMax) ||
1324             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1325         {
1326             infoPtr->MinVal = 0;
1327             infoPtr->MaxVal = 0;
1328         }
1329         else
1330         {
1331             if( infoPtr->MinVal != info->nMin ||
1332                 infoPtr->MaxVal != info->nMax )
1333             {
1334                *action |= SA_SSI_REFRESH;
1335                 infoPtr->MinVal = info->nMin;
1336                 infoPtr->MaxVal = info->nMax;
1337             }
1338         }
1339     }
1340
1341     /* Make sure the page size is valid */
1342
1343     if (infoPtr->Page < 0) infoPtr->Page = 0;
1344     else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1345         infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1346
1347     /* Make sure the pos is inside the range */
1348
1349     if (infoPtr->CurVal < infoPtr->MinVal)
1350         infoPtr->CurVal = infoPtr->MinVal;
1351     else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1352         infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1353
1354     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1355                  infoPtr->Page, infoPtr->CurVal,
1356                  infoPtr->MinVal, infoPtr->MaxVal );
1357
1358     /* don't change the scrollbar state if SetScrollInfo
1359      * is just called with SIF_DISABLENOSCROLL
1360      */
1361     if(!(info->fMask & SIF_ALL)) goto done;
1362
1363     /* Check if the scrollbar should be hidden or disabled */
1364
1365     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1366     {
1367         new_flags = infoPtr->flags;
1368         if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1369         {
1370             /* Hide or disable scroll-bar */
1371             if (info->fMask & SIF_DISABLENOSCROLL)
1372             {
1373                 new_flags = ESB_DISABLE_BOTH;
1374                *action |= SA_SSI_REFRESH;
1375             }
1376             else if (nBar != SB_CTL)
1377             {
1378                 *action = SA_SSI_HIDE;
1379                 goto done;
1380             }
1381         }
1382         else  /* Show and enable scroll-bar */
1383         {
1384             new_flags = 0;
1385             if (nBar != SB_CTL)
1386                 *action |= SA_SSI_SHOW;
1387         }
1388
1389         if (infoPtr->flags != new_flags) /* check arrow flags */
1390         {
1391             infoPtr->flags = new_flags;
1392            *action |= SA_SSI_REPAINT_ARROWS;
1393         }
1394     }
1395
1396 done:
1397     /* Return current position */
1398
1399     return infoPtr->CurVal;
1400 }
1401
1402
1403 /*************************************************************************
1404  *           GetScrollInfo16   (USER.476)
1405  */
1406 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1407 {
1408     return GetScrollInfo( hwnd, nBar, info );
1409 }
1410
1411
1412 /*************************************************************************
1413  *           GetScrollInfo32   (USER32.284)
1414  * GetScrollInfo32 can be used to retrieve the position, upper bound,
1415  * lower bound, and page size of a scrollbar control.
1416  *
1417  * RETURNS STD
1418  */
1419 BOOL WINAPI GetScrollInfo(
1420   HWND hwnd /* [I] Handle of window */ ,
1421   INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1422   LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1423 {
1424     SCROLLBAR_INFO *infoPtr;
1425
1426     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1427     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1428     if ((info->cbSize != sizeof(*info)) &&
1429         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1430
1431     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1432     if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1433     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1434         info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1435     if (info->fMask & SIF_RANGE)
1436     {
1437         info->nMin = infoPtr->MinVal;
1438         info->nMax = infoPtr->MaxVal;
1439     }
1440     return (info->fMask & SIF_ALL) != 0;
1441 }
1442
1443
1444 /*************************************************************************
1445  *           SetScrollPos16   (USER.62)
1446  */
1447 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1448                              BOOL16 bRedraw )
1449 {
1450     return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1451 }
1452
1453
1454 /*************************************************************************
1455  *           SetScrollPos32   (USER32.502)
1456  *
1457  * RETURNS
1458  *    Success: Scrollbar position
1459  *    Failure: 0
1460  *
1461  * REMARKS
1462  *    Note the ambiguity when 0 is returned.  Use GetLastError
1463  *    to make sure there was an error (and to know which one).
1464  */
1465 INT WINAPI SetScrollPos(
1466 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1467 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1468 INT nPos /* [I] New value */,
1469 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1470 {
1471     SCROLLINFO info;
1472     SCROLLBAR_INFO *infoPtr;
1473     INT oldPos;
1474
1475     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1476     oldPos      = infoPtr->CurVal;
1477     info.cbSize = sizeof(info);
1478     info.nPos   = nPos;
1479     info.fMask  = SIF_POS;
1480     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1481     return oldPos;
1482 }
1483
1484
1485 /*************************************************************************
1486  *           GetScrollPos16   (USER.63)
1487  */
1488 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1489 {
1490     return (INT16)GetScrollPos( hwnd, nBar );
1491 }
1492
1493
1494 /*************************************************************************
1495  *           GetScrollPos32   (USER32.285)
1496  *
1497  * RETURNS
1498  *    Success: Current position
1499  *    Failure: 0
1500  *
1501  * REMARKS
1502  *    Note the ambiguity when 0 is returned.  Use GetLastError
1503  *    to make sure there was an error (and to know which one).
1504  */
1505 INT WINAPI GetScrollPos(
1506 HWND hwnd, /* [I] Handle of window */
1507 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1508 {
1509     SCROLLBAR_INFO *infoPtr;
1510
1511     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1512     return infoPtr->CurVal;
1513 }
1514
1515
1516 /*************************************************************************
1517  *           SetScrollRange16   (USER.64)
1518  */
1519 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1520                               INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1521 {
1522     /* Invalid range -> range is set to (0,0) */
1523     if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1524     SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1525 }
1526
1527
1528 /*************************************************************************
1529  *           SetScrollRange32   (USER32.503)
1530  *
1531  * RETURNS STD
1532  */
1533 BOOL WINAPI SetScrollRange(
1534 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1535 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1536 INT MinVal, /* [I] New minimum value */
1537 INT MaxVal, /* [I] New maximum value */
1538 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1539 {
1540     SCROLLINFO info;
1541
1542     info.cbSize = sizeof(info);
1543     info.nMin   = MinVal;
1544     info.nMax   = MaxVal;
1545     info.fMask  = SIF_RANGE;
1546     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1547     return TRUE;
1548 }
1549
1550
1551 /*************************************************************************
1552  *           SCROLL_SetNCSbState
1553  *
1554  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1555  */
1556 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1557                                        int hMin, int hMax, int hPos)
1558 {
1559     INT vA, hA;
1560     SCROLLINFO vInfo, hInfo;
1561
1562     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1563     vInfo.nMin   = vMin;         hInfo.nMin   = hMin;
1564     vInfo.nMax   = vMax;         hInfo.nMax   = hMax;
1565     vInfo.nPos   = vPos;         hInfo.nPos   = hPos;
1566     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1567
1568     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1569     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1570
1571     if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1572                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1573     {
1574         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1575         if( vA & SA_SSI_REFRESH )
1576             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1577
1578         if( hA & SA_SSI_REFRESH )
1579             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1580     }
1581     return 0;
1582 }
1583
1584
1585 /*************************************************************************
1586  *           GetScrollRange16   (USER.65)
1587  */
1588 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1589                                 LPINT16 lpMin, LPINT16 lpMax)
1590 {
1591     INT min, max;
1592     BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1593     if (lpMin) *lpMin = min;
1594     if (lpMax) *lpMax = max;
1595     return ret;
1596 }
1597
1598
1599 /*************************************************************************
1600  *           GetScrollRange32   (USER32.286)
1601  *
1602  * RETURNS STD
1603  */
1604 BOOL WINAPI GetScrollRange(
1605 HWND hwnd, /* [I] Handle of window */
1606 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL  */
1607 LPINT lpMin, /* [O] Where to store minimum value */
1608 LPINT lpMax /* [O] Where to store maximum value */)
1609 {
1610     SCROLLBAR_INFO *infoPtr;
1611
1612     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1613     {
1614         if (lpMin) lpMin = 0;
1615         if (lpMax) lpMax = 0;
1616         return FALSE;
1617     }
1618     if (lpMin) *lpMin = infoPtr->MinVal;
1619     if (lpMax) *lpMax = infoPtr->MaxVal;
1620     return TRUE;
1621 }
1622
1623
1624 /*************************************************************************
1625  *           SCROLL_ShowScrollBar()
1626  *
1627  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1628  * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1629  */
1630 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1631                              BOOL fShowH, BOOL fShowV )
1632 {
1633     WND *wndPtr = WIN_FindWndPtr( hwnd );
1634     BOOL retvalue = FALSE;
1635
1636     if (!wndPtr) return FALSE;
1637     TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1638                     hwnd, nBar, fShowH, fShowV );
1639
1640     switch(nBar)
1641     {
1642     case SB_CTL:
1643         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1644         retvalue = TRUE;
1645         goto END;
1646
1647     case SB_BOTH:
1648     case SB_HORZ:
1649         if (fShowH)
1650         {
1651             fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1652             wndPtr->dwStyle |= WS_HSCROLL;
1653         }
1654         else  /* hide it */
1655         {
1656             fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1657             wndPtr->dwStyle &= ~WS_HSCROLL;
1658         }
1659         if( nBar == SB_HORZ ) {
1660             fShowV = FALSE;
1661             break;
1662         }
1663         /* fall through */
1664
1665     case SB_VERT:
1666         if (fShowV)
1667         {
1668             fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1669             wndPtr->dwStyle |= WS_VSCROLL;
1670         }
1671         else  /* hide it */
1672         {
1673             fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1674             wndPtr->dwStyle &= ~WS_VSCROLL;
1675         }
1676         if ( nBar == SB_VERT )
1677            fShowH = FALSE;
1678         break;
1679
1680     default:
1681         retvalue = FALSE;  /* Nothing to do! */
1682         goto END;
1683     }
1684
1685     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1686     {
1687         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1688                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1689         retvalue = TRUE;
1690         goto END;
1691     }
1692
1693     retvalue = FALSE; /* no frame changes */
1694 END:
1695     WIN_ReleaseWndPtr(wndPtr);
1696     return retvalue;
1697 }
1698
1699
1700 /*************************************************************************
1701  *           ShowScrollBar16   (USER.267)
1702  */
1703 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1704 {
1705     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1706                                       (nBar == SB_HORZ) ? 0 : fShow );
1707 }
1708
1709
1710 /*************************************************************************
1711  *           ShowScrollBar32   (USER32.532)
1712  *
1713  * RETURNS STD
1714  */
1715 BOOL WINAPI ShowScrollBar(
1716 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected   */
1717 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1718 BOOL fShow /* [I] TRUE = show, FALSE = hide  */)
1719 {
1720     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1721                                       (nBar == SB_HORZ) ? 0 : fShow );
1722     return TRUE;
1723 }
1724
1725
1726 /*************************************************************************
1727  *           EnableScrollBar16   (USER.482)
1728  */
1729 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1730 {
1731     return EnableScrollBar( hwnd, nBar, flags );
1732 }
1733
1734
1735 /*************************************************************************
1736  *           EnableScrollBar32   (USER32.171)
1737  */
1738 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1739 {
1740     BOOL bFineWithMe;
1741     SCROLLBAR_INFO *infoPtr;
1742
1743     TRACE("%04x %d %d\n", hwnd, nBar, flags );
1744
1745     flags &= ESB_DISABLE_BOTH;
1746
1747     if (nBar == SB_BOTH)
1748     {
1749         if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1750         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1751         {
1752             infoPtr->flags = flags;
1753             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1754         }
1755         nBar = SB_HORZ;
1756     }
1757     else
1758         bFineWithMe = TRUE;
1759
1760     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1761     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1762     infoPtr->flags = flags;
1763
1764     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1765     return TRUE;
1766 }