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 "scroll.h"
  12 #include "heap.h"
  13 #include "win.h"
  14 #include "debugtools.h"
  15 #include "cache.h"
  16 #include "tweak.h"
  17
  18 DEFAULT_DEBUG_CHANNEL(scroll);
  19
  20
  21 static HBITMAP hUpArrow = 0;
  22 static HBITMAP hDnArrow = 0;
  23 static HBITMAP hLfArrow = 0;
  24 static HBITMAP hRgArrow = 0;
  25 static HBITMAP hUpArrowD = 0;
  26 static HBITMAP hDnArrowD = 0;
  27 static HBITMAP hLfArrowD = 0;
  28 static HBITMAP hRgArrowD = 0;
  29 static HBITMAP hUpArrowI = 0;
  30 static HBITMAP hDnArrowI = 0;
  31 static HBITMAP hLfArrowI = 0;
  32 static HBITMAP hRgArrowI = 0;
  33
  34 #define TOP_ARROW(flags,pressed) \
  35    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  36 #define BOTTOM_ARROW(flags,pressed) \
  37    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  38 #define LEFT_ARROW(flags,pressed) \
  39    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  40 #define RIGHT_ARROW(flags,pressed) \
  41    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  42
  43
  44   /* Minimum size of the rectangle between the arrows */
  45 #define SCROLL_MIN_RECT  4
  46
  47   /* Minimum size of the thumb in pixels */
  48 #define SCROLL_MIN_THUMB 6
  49
  50   /* Overlap between arrows and thumb */
  51 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
  52
  53   /* Delay (in ms) before first repetition when holding the button down */
  54 #define SCROLL_FIRST_DELAY   200
  55
  56   /* Delay (in ms) between scroll repetitions */
  57 #define SCROLL_REPEAT_DELAY  50
  58
  59   /* Scroll timer id */
  60 #define SCROLL_TIMER   0
  61
  62   /* Scroll-bar hit testing */
  63 enum SCROLL_HITTEST
  64 {
  65     SCROLL_NOWHERE,      /* Outside the scroll bar */
  66     SCROLL_TOP_ARROW,    /* Top or left arrow */
  67     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  68     SCROLL_THUMB,        /* Thumb rectangle */
  69     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  70     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  71 };
  72
  73  /* What to do after SCROLL_SetScrollInfo() */
  74 #define SA_SSI_HIDE             0x0001
  75 #define SA_SSI_SHOW             0x0002
  76 #define SA_SSI_REFRESH          0x0004
  77 #define SA_SSI_REPAINT_ARROWS   0x0008
  78
  79  /* Thumb-tracking info */
  80 static HWND SCROLL_TrackingWin = 0;
  81 static INT  SCROLL_TrackingBar = 0;
  82 static INT  SCROLL_TrackingPos = 0;
  83 static INT  SCROLL_TrackingVal = 0;
  84  /* Hit test code of the last button-down event */
  85 static enum SCROLL_HITTEST SCROLL_trackHitTest;
  86 static BOOL SCROLL_trackVertical;
  87
  88  /* Is the moving thumb being displayed? */
  89 static BOOL SCROLL_MovingThumb = FALSE;
  90
  91  /* Local functions */
  92 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
  93                                     BOOL fShowH, BOOL fShowV );
  94 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
  95                                    const SCROLLINFO *info, INT *action );
  96 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
  97                                     RECT *rect, INT arrowSize,
  98                                     INT thumbSize, INT thumbPos,
  99                                     UINT flags, BOOL vertical,
 100                                     BOOL top_selected, BOOL bottom_selected );
 101
 102
 103 /***********************************************************************
 104  *           SCROLL_LoadBitmaps
 105  */
 106 static void SCROLL_LoadBitmaps(void)
 107 {
 108     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 109     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 110     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 111     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 112     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 113     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 114     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 115     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 116     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 117     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 118     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 119     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 120 }
 121
 122
 123 /***********************************************************************
 124  *           SCROLL_GetPtrScrollInfo
 125  */
 126 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
 127 {
 128     SCROLLBAR_INFO *infoPtr;
 129
 130     if (!wndPtr) return NULL;
 131     switch(nBar)
 132     {
 133         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 134         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 135         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 136         default:      return NULL;
 137     }
 138
 139     if (!infoPtr)  /* Create the info structure if needed */
 140     {
 141         if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
 142         {
 143             infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
 144             infoPtr->MaxVal = 100;
 145             infoPtr->flags  = ESB_ENABLE_BOTH;
 146             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 147             else wndPtr->pVScroll = infoPtr;
 148         }
 149         if (!hUpArrow) SCROLL_LoadBitmaps();
 150     }
 151     return infoPtr;
 152 }
 153
 154
 155 /***********************************************************************
 156  *           SCROLL_GetScrollInfo
 157  */
 158 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
 159 {
 160    SCROLLBAR_INFO *retvalue;
 161    WND *wndPtr = WIN_FindWndPtr( hwnd );
 162    retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 163    WIN_ReleaseWndPtr(wndPtr);
 164    return retvalue;
 165 }
 166
 167
 168 /***********************************************************************
 169  *           SCROLL_GetScrollBarRect
 170  *
 171  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 172  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 173  * 'arrowSize' returns the width or height of an arrow (depending on
 174  * the orientation of the scrollbar), 'thumbSize' returns the size of
 175  * the thumb, and 'thumbPos' returns the position of the thumb
 176  * relative to the left or to the top.
 177  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 178  */
 179 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 180                                        INT *arrowSize, INT *thumbSize,
 181                                        INT *thumbPos )
 182 {
 183     INT pixels;
 184     BOOL vertical;
 185     WND *wndPtr = WIN_FindWndPtr( hwnd );
 186
 187     switch(nBar)
 188     {
 189       case SB_HORZ:
 190         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 191         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 192         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 193         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 194         if(wndPtr->dwStyle & WS_BORDER) {
 195           lprect->left--;
 196           lprect->right++;
 197         } else if(wndPtr->dwStyle & WS_VSCROLL)
 198           lprect->right++;
 199         vertical = FALSE;
 200         break;
 201
 202       case SB_VERT:
 203         lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 204         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 205         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 206         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 207         if(wndPtr->dwStyle & WS_BORDER) {
 208           lprect->top--;
 209           lprect->bottom++;
 210         } else if(wndPtr->dwStyle & WS_HSCROLL)
 211           lprect->bottom++;
 212         vertical = TRUE;
 213         break;
 214
 215       case SB_CTL:
 216         GetClientRect( hwnd, lprect );
 217         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 218         break;
 219
 220     default:
 221         WIN_ReleaseWndPtr(wndPtr);
 222         return FALSE;
 223     }
 224
 225     if (vertical) pixels = lprect->bottom - lprect->top;
 226     else pixels = lprect->right - lprect->left;
 227
 228     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 229     {
 230         if (pixels > SCROLL_MIN_RECT)
 231             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 232         else
 233             *arrowSize = 0;
 234         *thumbPos = *thumbSize = 0;
 235     }
 236     else
 237     {
 238         SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 239
 240         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 241         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 242
 243         if (info->Page)
 244         {
 245             *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
 246             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 247         }
 248         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 249
 250         if (((pixels -= *thumbSize ) < 0) ||
 251             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 252         {
 253             /* Rectangle too small or scrollbar disabled -> no thumb */
 254             *thumbPos = *thumbSize = 0;
 255         }
 256         else
 257         {
 258             INT max = info->MaxVal - max( info->Page-1, 0 );
 259             if (info->MinVal >= max)
 260                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 261             else
 262                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 263                  + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
 264         }
 265     }
 266     WIN_ReleaseWndPtr(wndPtr);
 267     return vertical;
 268 }
 269
 270
 271 /***********************************************************************
 272  *           SCROLL_GetThumbVal
 273  *
 274  * Compute the current scroll position based on the thumb position in pixels
 275  * from the top of the scroll-bar.
 276  */
 277 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 278                                   BOOL vertical, INT pos )
 279 {
 280     INT thumbSize;
 281     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 282
 283     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 284         return infoPtr->MinVal;
 285
 286     if (infoPtr->Page)
 287     {
 288         thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
 289         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 290     }
 291     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 292
 293     if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
 294
 295     pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 296     if (pos > pixels) pos = pixels;
 297
 298     if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
 299     else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
 300     return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
 301 }
 302
 303 /***********************************************************************
 304  *           SCROLL_PtInRectEx
 305  */
 306 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 307 {
 308     RECT rect = *lpRect;
 309
 310     if (vertical)
 311     {
 312         rect.left -= lpRect->right - lpRect->left;
 313         rect.right += lpRect->right - lpRect->left;
 314     }
 315     else
 316     {
 317         rect.top -= lpRect->bottom - lpRect->top;
 318         rect.bottom += lpRect->bottom - lpRect->top;
 319     }
 320     return PtInRect( &rect, pt );
 321 }
 322
 323 /***********************************************************************
 324  *           SCROLL_ClipPos
 325  */
 326 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 327 {
 328     if( pt.x < lpRect->left )
 329         pt.x = lpRect->left;
 330     else
 331     if( pt.x > lpRect->right )
 332         pt.x = lpRect->right;
 333
 334     if( pt.y < lpRect->top )
 335         pt.y = lpRect->top;
 336     else
 337     if( pt.y > lpRect->bottom )
 338         pt.y = lpRect->bottom;
 339
 340     return pt;
 341 }
 342
 343
 344 /***********************************************************************
 345  *           SCROLL_HitTest
 346  *
 347  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 348  */
 349 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 350                                            POINT pt, BOOL bDragging )
 351 {
 352     INT arrowSize, thumbSize, thumbPos;
 353     RECT rect;
 354
 355     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 356                                            &arrowSize, &thumbSize, &thumbPos );
 357
 358     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 359          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 360
 361     if (vertical)
 362     {
 363         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 364         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 365         if (!thumbPos) return SCROLL_TOP_RECT;
 366         pt.y -= rect.top;
 367         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 368         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 369     }
 370     else  /* horizontal */
 371     {
 372         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 373         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 374         if (!thumbPos) return SCROLL_TOP_RECT;
 375         pt.x -= rect.left;
 376         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 377         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 378     }
 379     return SCROLL_THUMB;
 380 }
 381
 382
 383 /***********************************************************************
 384  *           SCROLL_DrawArrows
 385  *
 386  * Draw the scroll bar arrows.
 387  */
 388 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
 389                                   RECT *rect, INT arrowSize, BOOL vertical,
 390                                   BOOL top_pressed, BOOL bottom_pressed )
 391 {
 392   RECT r;
 393
 394   r = *rect;
 395   if( vertical )
 396     r.bottom = r.top + arrowSize;
 397   else
 398     r.right = r.left + arrowSize;
 399
 400   DrawFrameControl( hdc, &r, DFC_SCROLL,
 401                     (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
 402                     | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 403                     | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
 404
 405   r = *rect;
 406   if( vertical )
 407     r.top = r.bottom-arrowSize;
 408   else
 409     r.left = r.right-arrowSize;
 410
 411   DrawFrameControl( hdc, &r, DFC_SCROLL,
 412                     (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
 413                     | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 414                     | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
 415 }
 416
 417 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
 418                                   RECT *rect, INT arrowSize, BOOL vertical,
 419                                   BOOL top_pressed, BOOL bottom_pressed )
 420 {
 421     HDC hdcMem = CreateCompatibleDC( hdc );
 422     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 423                                     TOP_ARROW(infoPtr->flags, top_pressed)
 424                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 425
 426     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 427     StretchBlt( hdc, rect->left, rect->top,
 428                   vertical ? rect->right-rect->left : arrowSize,
 429                   vertical ? arrowSize : rect->bottom-rect->top,
 430                   hdcMem, 0, 0,
 431                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 432                   SRCCOPY );
 433
 434     SelectObject( hdcMem, vertical ?
 435                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 436                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 437     if (vertical)
 438         StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
 439                       rect->right - rect->left, arrowSize,
 440                       hdcMem, 0, 0,
 441                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 442                       SRCCOPY );
 443     else
 444         StretchBlt( hdc, rect->right - arrowSize, rect->top,
 445                       arrowSize, rect->bottom - rect->top,
 446                       hdcMem, 0, 0,
 447                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 448                       SRCCOPY );
 449     SelectObject( hdcMem, hbmpPrev );
 450     DeleteDC( hdcMem );
 451 }
 452
 453 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 454                                RECT *rect, INT arrowSize, BOOL vertical,
 455                                BOOL top_pressed, BOOL bottom_pressed )
 456 {
 457   if( TWEAK_WineLook == WIN31_LOOK )
 458     SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
 459                           vertical, top_pressed,bottom_pressed );
 460   else
 461     SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
 462                           vertical, top_pressed,bottom_pressed );
 463 }
 464
 465
 466 /***********************************************************************
 467  *           SCROLL_DrawMovingThumb
 468  *
 469  * Draw the moving thumb rectangle.
 470  */
 471 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
 472                                        INT arrowSize, INT thumbSize )
 473 {
 474     RECT r = *rect;
 475     if (vertical)
 476     {
 477         r.top += SCROLL_TrackingPos;
 478         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 479             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 480         if (r.top + thumbSize >
 481                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 482             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 483                                                                   - thumbSize;
 484         r.bottom = r.top + thumbSize;
 485     }
 486     else
 487     {
 488         r.left += SCROLL_TrackingPos;
 489         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 490             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 491         if (r.left + thumbSize >
 492                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 493             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 494                                                                   - thumbSize;
 495         r.right = r.left + thumbSize;
 496     }
 497
 498     DrawFocusRect( hdc, &r );
 499     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 500 }
 501
 502 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
 503                                        INT arrowSize, INT thumbSize )
 504 {
 505   INT pos = SCROLL_TrackingPos;
 506   INT max_size;
 507
 508   if( vertical )
 509     max_size = rect->bottom - rect->top;
 510   else
 511     max_size = rect->right - rect->left;
 512
 513   max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
 514
 515   if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
 516     pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
 517   else if( pos > max_size )
 518     pos = max_size;
 519
 520   SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
 521                           rect, arrowSize, thumbSize, pos,
 522                           0, vertical, FALSE, FALSE );
 523
 524   SCROLL_MovingThumb = !SCROLL_MovingThumb;
 525 }
 526
 527 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 528                                     INT arrowSize, INT thumbSize )
 529 {
 530   if( TWEAK_WineLook == WIN31_LOOK )
 531     SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
 532   else
 533     SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
 534 }
 535
 536 /***********************************************************************
 537  *           SCROLL_DrawInterior
 538  *
 539  * Draw the scroll bar interior (everything except the arrows).
 540  */
 541 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 542                                     RECT *rect, INT arrowSize,
 543                                     INT thumbSize, INT thumbPos,
 544                                     UINT flags, BOOL vertical,
 545                                     BOOL top_selected, BOOL bottom_selected )
 546 {
 547     RECT r;
 548     HPEN hSavePen;
 549     HBRUSH hSaveBrush,hBrush;
 550
 551     /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 552      * The window-owned scrollbars need to call DEFWND_ControlColor
 553      * to correctly setup default scrollbar colors
 554      */
 555     if (nBar == SB_CTL)
 556     {
 557       hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 558                                      (WPARAM)hdc,(LPARAM)hwnd);
 559     }
 560     else
 561     {
 562       hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 563     }
 564
 565     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 566     hSaveBrush = SelectObject( hdc, hBrush );
 567
 568     /* Calculate the scroll rectangle */
 569     r = *rect;
 570     if (vertical)
 571     {
 572         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 573         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 574     }
 575     else
 576     {
 577         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 578         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 579     }
 580
 581     /* Draw the scroll rectangles and thumb */
 582     if (!thumbPos)  /* No thumb to draw */
 583     {
 584         PatBlt( hdc, r.left, r.top,
 585                      r.right - r.left, r.bottom - r.top,
 586                      PATCOPY );
 587
 588         /* cleanup and return */
 589         SelectObject( hdc, hSavePen );
 590         SelectObject( hdc, hSaveBrush );
 591         return;
 592     }
 593
 594     if (vertical)
 595     {
 596         PatBlt( hdc, r.left, r.top,
 597                   r.right - r.left,
 598                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 599                   top_selected ? 0x0f0000 : PATCOPY );
 600         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 601         PatBlt( hdc, r.left, r.top + thumbSize,
 602                   r.right - r.left,
 603                   r.bottom - r.top - thumbSize,
 604                   bottom_selected ? 0x0f0000 : PATCOPY );
 605         r.bottom = r.top + thumbSize;
 606     }
 607     else  /* horizontal */
 608     {
 609         PatBlt( hdc, r.left, r.top,
 610                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 611                   r.bottom - r.top,
 612                   top_selected ? 0x0f0000 : PATCOPY );
 613         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 614         PatBlt( hdc, r.left + thumbSize, r.top,
 615                   r.right - r.left - thumbSize,
 616                   r.bottom - r.top,
 617                   bottom_selected ? 0x0f0000 : PATCOPY );
 618         r.right = r.left + thumbSize;
 619     }
 620
 621     /* Draw the thumb */
 622     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE  );
 623
 624     /* cleanup */
 625     SelectObject( hdc, hSavePen );
 626     SelectObject( hdc, hSaveBrush );
 627 }
 628
 629
 630 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 631                                  RECT *rect, INT arrowSize,
 632                                  INT thumbSize, INT thumbPos,
 633                                  UINT flags, BOOL vertical,
 634                                  BOOL top_selected, BOOL bottom_selected )
 635 {
 636     RECT r;
 637     HPEN hSavePen;
 638     HBRUSH hSaveBrush,hBrush;
 639     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 640
 641     if (Save_SCROLL_MovingThumb &&
 642         (SCROLL_TrackingWin == hwnd) &&
 643         (SCROLL_TrackingBar == nBar))
 644         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 645
 646       /* Select the correct brush and pen */
 647
 648     if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 649     {
 650         /* This ought to be the color of the parent window */
 651         if (TWEAK_WineLook == WIN31_LOOK) {
 652             hBrush = GetSysColorBrush(COLOR_WINDOW);
 653         } else {
 654             /* Under Win9x look & feel, scrollbars don't have a solid border.
 655              * To make scrollbar's background different from the window
 656              * background, we need to apply a gray 0x55aa pattern brush.
 657              * Otherwise it won't look good.
 658              */
 659             hBrush = CACHE_GetPattern55AABrush();
 660        }
 661     }
 662     else
 663     {
 664         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 665          * The window-owned scrollbars need to call DEFWND_ControlColor
 666          * to correctly setup default scrollbar colors
 667          */
 668         if (nBar == SB_CTL) {
 669             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 670                                            (WPARAM)hdc,(LPARAM)hwnd);
 671         } else {
 672             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 673         }
 674     }
 675     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 676     hSaveBrush = SelectObject( hdc, hBrush );
 677
 678       /* Calculate the scroll rectangle */
 679
 680     r = *rect;
 681     if (vertical)
 682     {
 683         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 684         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 685     }
 686     else
 687     {
 688         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 689         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 690     }
 691
 692       /* Draw the scroll bar frame */
 693
 694         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 695     if (TWEAK_WineLook == WIN31_LOOK)
 696         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 697
 698       /* Draw the scroll rectangles and thumb */
 699
 700     if (!thumbPos)  /* No thumb to draw */
 701     {
 702         INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
 703
 704         PatBlt( hdc, r.left+offset, r.top+offset,
 705                      r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
 706                      PATCOPY );
 707
 708         /* cleanup and return */
 709         SelectObject( hdc, hSavePen );
 710         SelectObject( hdc, hSaveBrush );
 711         return;
 712     }
 713
 714     if (vertical)
 715     {
 716         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 717
 718         PatBlt( hdc, r.left + offset, r.top + offset,
 719                   r.right - r.left - offset*2,
 720                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
 721                   top_selected ? 0x0f0000 : PATCOPY );
 722         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 723         PatBlt( hdc, r.left + offset, r.top + thumbSize,
 724                   r.right - r.left - offset*2,
 725                   r.bottom - r.top - thumbSize - offset,
 726                   bottom_selected ? 0x0f0000 : PATCOPY );
 727         r.bottom = r.top + thumbSize;
 728     }
 729     else  /* horizontal */
 730     {
 731         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 732
 733         PatBlt( hdc, r.left + offset, r.top + offset,
 734                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 735                   r.bottom - r.top - offset*2,
 736                   top_selected ? 0x0f0000 : PATCOPY );
 737         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 738         PatBlt( hdc, r.left + thumbSize, r.top + offset,
 739                   r.right - r.left - thumbSize - offset,
 740                   r.bottom - r.top - offset*2,
 741                   bottom_selected ? 0x0f0000 : PATCOPY );
 742         r.right = r.left + thumbSize;
 743     }
 744
 745       /* Draw the thumb */
 746
 747     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 748     if (TWEAK_WineLook == WIN31_LOOK)
 749     {
 750         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 751         r.top++, r.left++;
 752     }
 753     else
 754     {
 755         Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
 756     }
 757     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 758
 759     if (Save_SCROLL_MovingThumb &&
 760         (SCROLL_TrackingWin == hwnd) &&
 761         (SCROLL_TrackingBar == nBar))
 762         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 763
 764     /* cleanup */
 765     SelectObject( hdc, hSavePen );
 766     SelectObject( hdc, hSaveBrush );
 767 }
 768
 769
 770 /***********************************************************************
 771  *           SCROLL_DrawScrollBar
 772  *
 773  * Redraw the whole scrollbar.
 774  */
 775 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 776                            BOOL arrows, BOOL interior )
 777 {
 778     INT arrowSize, thumbSize, thumbPos;
 779     RECT rect;
 780     BOOL vertical;
 781     WND *wndPtr = WIN_FindWndPtr( hwnd );
 782     SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 783     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 784
 785     if (!wndPtr || !infoPtr ||
 786         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 787         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 788     if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
 789
 790     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 791                                         &arrowSize, &thumbSize, &thumbPos );
 792
 793     /* do not draw if the scrollbar rectangle is empty */
 794     if(IsRectEmpty(&rect))
 795       goto END;
 796
 797     if (Save_SCROLL_MovingThumb &&
 798         (SCROLL_TrackingWin == hwnd) &&
 799         (SCROLL_TrackingBar == nBar))
 800         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 801
 802       /* Draw the arrows */
 803
 804     if (arrows && arrowSize)
 805     {
 806         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 807             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 808                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 809                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 810         else
 811             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 812                                                                FALSE, FALSE );
 813     }
 814     if( interior )
 815         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 816                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 817
 818     if (Save_SCROLL_MovingThumb &&
 819         (SCROLL_TrackingWin == hwnd) &&
 820         (SCROLL_TrackingBar == nBar))
 821         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 822
 823     /* if scroll bar has focus, reposition the caret*/
 824     if(hwnd==GetFocus() && (nBar==SB_CTL))
 825     {
 826         if (!vertical)
 827         {
 828             SetCaretPos(thumbPos+1, rect.top+1);
 829         }
 830         else
 831         {
 832             SetCaretPos(rect.top+1, thumbPos+1);
 833         }
 834     }
 835
 836 END:
 837     WIN_ReleaseWndPtr(wndPtr);
 838 }
 839
 840
 841 /***********************************************************************
 842  *           SCROLL_RefreshScrollBar
 843  *
 844  * Repaint the scroll bar interior after a SetScrollRange() or
 845  * SetScrollPos() call.
 846  */
 847 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 848                                      BOOL arrows, BOOL interior )
 849 {
 850     HDC hdc = GetDCEx( hwnd, 0,
 851                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 852     if (!hdc) return;
 853
 854     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 855     ReleaseDC( hwnd, hdc );
 856 }
 857
 858
 859 /***********************************************************************
 860  *           SCROLL_HandleKbdEvent
 861  *
 862  * Handle a keyboard event (only for SB_CTL scrollbars).
 863  */
 864 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
 865 {
 866     WND *wndPtr = WIN_FindWndPtr( hwnd );
 867     WPARAM msg;
 868
 869     switch(wParam)
 870     {
 871     case VK_PRIOR: msg = SB_PAGEUP; break;
 872     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 873     case VK_HOME:  msg = SB_TOP; break;
 874     case VK_END:   msg = SB_BOTTOM; break;
 875     case VK_UP:    msg = SB_LINEUP; break;
 876     case VK_DOWN:  msg = SB_LINEDOWN; break;
 877     default:
 878         WIN_ReleaseWndPtr(wndPtr);
 879         return;
 880     }
 881     SendMessageA( GetParent(hwnd),
 882                     (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 883                     msg, hwnd );
 884     WIN_ReleaseWndPtr(wndPtr);
 885 }
 886
 887
 888 /***********************************************************************
 889  *           SCROLL_HandleScrollEvent
 890  *
 891  * Handle a mouse or timer event for the scrollbar.
 892  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 893  * windows coordinates.
 894  */
 895 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 896 {
 897       /* Previous mouse position for timer events */
 898     static POINT prevPt;
 899       /* Thumb position when tracking started. */
 900     static UINT trackThumbPos;
 901       /* Position in the scroll-bar of the last button-down event. */
 902     static INT lastClickPos;
 903       /* Position in the scroll-bar of the last mouse event. */
 904     static INT lastMousePos;
 905
 906     enum SCROLL_HITTEST hittest;
 907     HWND hwndOwner, hwndCtl;
 908     BOOL vertical;
 909     INT arrowSize, thumbSize, thumbPos;
 910     RECT rect;
 911     HDC hdc;
 912
 913     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 914     if (!infoPtr) return;
 915     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 916                   return;
 917
 918     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 919     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 920                                         &arrowSize, &thumbSize, &thumbPos );
 921     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 922     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 923
 924     switch(msg)
 925     {
 926       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 927           HideCaret(hwnd);  /* hide caret while holding down LBUTTON*/
 928           SCROLL_trackVertical = vertical;
 929           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 930           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 931           lastMousePos  = lastClickPos;
 932           trackThumbPos = thumbPos;
 933           prevPt = pt;
 934           SetCapture( hwnd );
 935           if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
 936           break;
 937
 938       case WM_MOUSEMOVE:
 939           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 940           prevPt = pt;
 941           break;
 942
 943       case WM_LBUTTONUP:
 944           hittest = SCROLL_NOWHERE;
 945           ReleaseCapture();
 946           /* if scrollbar has focus, show back caret */
 947           if (hwnd==GetFocus()) ShowCaret(hwnd);
 948           break;
 949
 950       case WM_SYSTIMER:
 951           pt = prevPt;
 952           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 953           break;
 954
 955       default:
 956           return;  /* Should never happen */
 957     }
 958
 959     TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
 960                  hwnd, nBar, msg, pt.x, pt.y, hittest );
 961
 962     switch(SCROLL_trackHitTest)
 963     {
 964     case SCROLL_NOWHERE:  /* No tracking in progress */
 965         break;
 966
 967     case SCROLL_TOP_ARROW:
 968         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 969                            (hittest == SCROLL_trackHitTest), FALSE );
 970         if (hittest == SCROLL_trackHitTest)
 971         {
 972             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 973             {
 974                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 975                                 SB_LINEUP, hwndCtl );
 976             }
 977
 978             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 979                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 980                             (TIMERPROC)0 );
 981         }
 982         else KillSystemTimer( hwnd, SCROLL_TIMER );
 983         break;
 984
 985     case SCROLL_TOP_RECT:
 986         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 987                              thumbPos, infoPtr->flags, vertical,
 988                              (hittest == SCROLL_trackHitTest), FALSE );
 989         if (hittest == SCROLL_trackHitTest)
 990         {
 991             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 992             {
 993                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 994                                 SB_PAGEUP, hwndCtl );
 995                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 996                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 997                                   (TIMERPROC)0 );
 998             }
 999         }
1000         else KillSystemTimer( hwnd, SCROLL_TIMER );
1001         break;
1002
1003     case SCROLL_THUMB:
1004         if (msg == WM_LBUTTONDOWN)
1005         {
1006             SCROLL_TrackingWin = hwnd;
1007             SCROLL_TrackingBar = nBar;
1008             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1009             if (!SCROLL_MovingThumb)
1010                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1011         }
1012         else if (msg == WM_LBUTTONUP)
1013         {
1014             if (SCROLL_MovingThumb)
1015                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1016             SCROLL_TrackingWin = 0;
1017             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1018                                  thumbPos, infoPtr->flags, vertical,
1019                                  FALSE, FALSE );
1020         }
1021         else  /* WM_MOUSEMOVE */
1022         {
1023             UINT pos;
1024
1025             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1026             else
1027             {
1028                 pt = SCROLL_ClipPos( &rect, pt );
1029                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1030             }
1031             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1032             {
1033                 if (SCROLL_MovingThumb)
1034                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1035                                         arrowSize, thumbSize );
1036                 lastMousePos = pos;
1037                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1038                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1039                                                          vertical,
1040                                                          SCROLL_TrackingPos );
1041                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1042                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1043                                 hwndCtl );
1044                 if (!SCROLL_MovingThumb)
1045                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1046                                         arrowSize, thumbSize );
1047             }
1048         }
1049         break;
1050
1051     case SCROLL_BOTTOM_RECT:
1052         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1053                              thumbPos, infoPtr->flags, vertical,
1054                              FALSE, (hittest == SCROLL_trackHitTest) );
1055         if (hittest == SCROLL_trackHitTest)
1056         {
1057             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1058             {
1059                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1060                                 SB_PAGEDOWN, hwndCtl );
1061                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1062                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1063                                   (TIMERPROC)0 );
1064             }
1065         }
1066         else KillSystemTimer( hwnd, SCROLL_TIMER );
1067         break;
1068
1069     case SCROLL_BOTTOM_ARROW:
1070         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1071                            FALSE, (hittest == SCROLL_trackHitTest) );
1072         if (hittest == SCROLL_trackHitTest)
1073         {
1074             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1075             {
1076                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1077                                 SB_LINEDOWN, hwndCtl );
1078             }
1079
1080             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1081                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1082                             (TIMERPROC)0 );
1083         }
1084         else KillSystemTimer( hwnd, SCROLL_TIMER );
1085         break;
1086     }
1087
1088     if (msg == WM_LBUTTONUP)
1089     {
1090         hittest = SCROLL_trackHitTest;
1091         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
1092
1093         if (hittest == SCROLL_THUMB)
1094         {
1095             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1096                                  trackThumbPos + lastMousePos - lastClickPos );
1097             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1098                             MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
1099         }
1100         else
1101             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1102                             SB_ENDSCROLL, hwndCtl );
1103     }
1104
1105     ReleaseDC( hwnd, hdc );
1106 }
1107
1108
1109 /***********************************************************************
1110  *           ScrollBarWndProc
1111  */
1112 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
1113                                  LPARAM lParam )
1114 {
1115     switch(message)
1116     {
1117     case WM_CREATE:
1118         {
1119             CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
1120             if (lpCreat->style & SBS_SIZEBOX)
1121             {
1122                 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
1123                 return 0;
1124             }
1125
1126             if (lpCreat->style & SBS_VERT)
1127             {
1128                 if (lpCreat->style & SBS_LEFTALIGN)
1129                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1130                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1131                 else if (lpCreat->style & SBS_RIGHTALIGN)
1132                     MoveWindow( hwnd,
1133                                   lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1134                                   lpCreat->y,
1135                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1136             }
1137             else  /* SBS_HORZ */
1138             {
1139                 if (lpCreat->style & SBS_TOPALIGN)
1140                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1141                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1142                 else if (lpCreat->style & SBS_BOTTOMALIGN)
1143                     MoveWindow( hwnd,
1144                                   lpCreat->x,
1145                                   lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1146                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1147             }
1148         }
1149         if (!hUpArrow) SCROLL_LoadBitmaps();
1150         TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
1151         return 0;
1152
1153     case WM_LBUTTONDOWN:
1154     case WM_LBUTTONUP:
1155     case WM_MOUSEMOVE:
1156     case WM_SYSTIMER:
1157         {
1158             POINT pt;
1159             pt.x = SLOWORD(lParam);
1160             pt.y = SHIWORD(lParam);
1161             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1162         }
1163         break;
1164
1165     /* if key event is received, the scrollbar has the focus*/
1166     case WM_KEYDOWN:
1167         /* hide caret on first KEYDOWN to prevent flicker */
1168         if ((lParam & 0x40000000)==0)
1169             HideCaret(hwnd);
1170         SCROLL_HandleKbdEvent( hwnd, wParam );
1171         break;
1172
1173     case WM_KEYUP:
1174         ShowCaret(hwnd);
1175         break;
1176
1177     case WM_SETFOCUS:
1178         {
1179             /* Create a caret when a ScrollBar get focus*/
1180             RECT rect;
1181             int arrowSize, thumbSize, thumbPos, vertical;
1182             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1183                                                 &arrowSize, &thumbSize, &thumbPos );
1184             if (!vertical)
1185             {
1186                 CreateCaret(hwnd,1, thumbSize-2, rect.bottom-rect.top-2);
1187                 SetCaretPos(thumbPos+1, rect.top+1);
1188             }
1189             else
1190             {
1191                 CreateCaret(hwnd,1, rect.right-rect.left-2,thumbSize-2);
1192                 SetCaretPos(rect.top+1, thumbPos+1);
1193             }
1194             ShowCaret(hwnd);
1195         }
1196         break;
1197
1198     case WM_KILLFOCUS:
1199         {
1200             RECT rect;
1201             int arrowSize, thumbSize, thumbPos, vertical;
1202             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1203             if (!vertical){
1204                 rect.left=thumbPos+1;
1205                 rect.right=rect.left+thumbSize;
1206             }
1207             else
1208             {
1209                 rect.top=thumbPos+1;
1210                 rect.bottom=rect.top+thumbSize;
1211             }
1212             HideCaret(hwnd);
1213             InvalidateRect(hwnd,&rect,0);
1214             DestroyCaret();
1215         }
1216         break;
1217
1218     case WM_ERASEBKGND:
1219          return 1;
1220
1221     case WM_GETDLGCODE:
1222          return DLGC_WANTARROWS; /* Windows returns this value */
1223
1224     case WM_PAINT:
1225         {
1226             PAINTSTRUCT ps;
1227             HDC hdc = BeginPaint( hwnd, &ps );
1228             SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1229             EndPaint( hwnd, &ps );
1230         }
1231         break;
1232
1233     case SBM_SETPOS16:
1234     case SBM_SETPOS:
1235         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1236
1237     case SBM_GETPOS16:
1238     case SBM_GETPOS:
1239         return GetScrollPos( hwnd, SB_CTL );
1240
1241     case SBM_SETRANGE16:
1242         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1243                           wParam  /* FIXME: Is this correct? */ );
1244         return 0;
1245
1246     case SBM_SETRANGE:
1247         SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1248         return 0;  /* FIXME: return previous position */
1249
1250     case SBM_GETRANGE16:
1251         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1252         return 0;
1253
1254     case SBM_GETRANGE:
1255         GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1256         return 0;
1257
1258     case SBM_ENABLE_ARROWS16:
1259     case SBM_ENABLE_ARROWS:
1260         return EnableScrollBar( hwnd, SB_CTL, wParam );
1261
1262     case SBM_SETRANGEREDRAW:
1263         SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1264         return 0;  /* FIXME: return previous position */
1265
1266     case SBM_SETSCROLLINFO:
1267         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1268
1269     case SBM_GETSCROLLINFO:
1270         return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1271
1272     case 0x00e5:
1273     case 0x00e7:
1274     case 0x00e8:
1275     case 0x00eb:
1276     case 0x00ec:
1277     case 0x00ed:
1278     case 0x00ee:
1279     case 0x00ef:
1280         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1281                     message, wParam, lParam );
1282         break;
1283
1284     default:
1285         if (message >= WM_USER)
1286             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1287                          message, wParam, lParam );
1288         return DefWindowProcA( hwnd, message, wParam, lParam );
1289     }
1290     return 0;
1291 }
1292
1293
1294 /*************************************************************************
1295  *           SetScrollInfo16   (USER.475)
1296  */
1297 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1298                               BOOL16 bRedraw )
1299 {
1300     return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1301 }
1302
1303
1304 /*************************************************************************
1305  *           SetScrollInfo   (USER32.501)
1306  * SetScrollInfo can be used to set the position, upper bound,
1307  * lower bound, and page size of a scrollbar control.
1308  *
1309  * RETURNS
1310  *    Scrollbar position
1311  *
1312  * NOTE
1313  *    For 100 lines of text to be displayed in a window of 25 lines,
1314  *  one would for instance use info->nMin=0, info->nMax=75
1315  *  (corresponding to the 76 different positions of the window on
1316  *  the text), and info->nPage=25.
1317  */
1318 INT WINAPI SetScrollInfo(
1319 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1320 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1321 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1322 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1323 {
1324     INT action;
1325     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1326
1327     if( action & SA_SSI_HIDE )
1328         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1329     else
1330     {
1331         if( action & SA_SSI_SHOW )
1332             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1333                 return retVal; /* SetWindowPos() already did the painting */
1334
1335         if( bRedraw && (action & SA_SSI_REFRESH))
1336             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1337         else if( action & SA_SSI_REPAINT_ARROWS )
1338             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1339     }
1340     return retVal;
1341 }
1342
1343 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1344                             const SCROLLINFO *info, INT *action  )
1345 {
1346     /* Update the scrollbar state and set action flags according to
1347      * what has to be done graphics wise. */
1348
1349     SCROLLBAR_INFO *infoPtr;
1350     UINT new_flags;
1351     BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1352
1353    *action = 0;
1354
1355     if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1356     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1357     if ((info->cbSize != sizeof(*info)) &&
1358         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1359
1360     if (TRACE_ON(scroll))
1361     {
1362         DPRINTF( "hwnd=%04x bar=%d", hwnd, nBar);
1363         if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1364         if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1365         if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1366         DPRINTF("\n");
1367     }
1368
1369     /* Set the page size */
1370
1371     if (info->fMask & SIF_PAGE)
1372     {
1373         if( infoPtr->Page != info->nPage )
1374         {
1375             infoPtr->Page = info->nPage;
1376            *action |= SA_SSI_REFRESH;
1377            bChangeParams = TRUE;
1378         }
1379     }
1380
1381     /* Set the scroll pos */
1382
1383     if (info->fMask & SIF_POS)
1384     {
1385         if( infoPtr->CurVal != info->nPos )
1386         {
1387             infoPtr->CurVal = info->nPos;
1388            *action |= SA_SSI_REFRESH;
1389         }
1390     }
1391
1392     /* Set the scroll range */
1393
1394     if (info->fMask & SIF_RANGE)
1395     {
1396         /* Invalid range -> range is set to (0,0) */
1397         if ((info->nMin > info->nMax) ||
1398             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1399         {
1400             infoPtr->MinVal = 0;
1401             infoPtr->MaxVal = 0;
1402             bChangeParams = TRUE;
1403         }
1404         else
1405         {
1406             if( infoPtr->MinVal != info->nMin ||
1407                 infoPtr->MaxVal != info->nMax )
1408             {
1409                 *action |= SA_SSI_REFRESH;
1410                 infoPtr->MinVal = info->nMin;
1411                 infoPtr->MaxVal = info->nMax;
1412                 bChangeParams = TRUE;
1413             }
1414         }
1415     }
1416
1417     /* Make sure the page size is valid */
1418
1419     if (infoPtr->Page < 0) infoPtr->Page = 0;
1420     else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1421         infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1422
1423     /* Make sure the pos is inside the range */
1424
1425     if (infoPtr->CurVal < infoPtr->MinVal)
1426         infoPtr->CurVal = infoPtr->MinVal;
1427     else if (infoPtr->CurVal > infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1428         infoPtr->CurVal = infoPtr->MaxVal - max( infoPtr->Page-1, 0 );
1429
1430     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1431                  infoPtr->Page, infoPtr->CurVal,
1432                  infoPtr->MinVal, infoPtr->MaxVal );
1433
1434     /* don't change the scrollbar state if SetScrollInfo
1435      * is just called with SIF_DISABLENOSCROLL
1436      */
1437     if(!(info->fMask & SIF_ALL)) goto done;
1438
1439     /* Check if the scrollbar should be hidden or disabled */
1440
1441     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1442     {
1443         new_flags = infoPtr->flags;
1444         if (infoPtr->MinVal >= infoPtr->MaxVal - max( infoPtr->Page-1, 0 ))
1445         {
1446             /* Hide or disable scroll-bar */
1447             if (info->fMask & SIF_DISABLENOSCROLL)
1448             {
1449                 new_flags = ESB_DISABLE_BOTH;
1450                *action |= SA_SSI_REFRESH;
1451             }
1452             else if ((nBar != SB_CTL) && bChangeParams)
1453             {
1454                 *action = SA_SSI_HIDE;
1455                 goto done;
1456             }
1457         }
1458         else  /* Show and enable scroll-bar */
1459         {
1460             new_flags = 0;
1461             if ((nBar != SB_CTL) && bChangeParams)
1462                 *action |= SA_SSI_SHOW;
1463         }
1464
1465         if (infoPtr->flags != new_flags) /* check arrow flags */
1466         {
1467             infoPtr->flags = new_flags;
1468            *action |= SA_SSI_REPAINT_ARROWS;
1469         }
1470     }
1471
1472 done:
1473     /* Return current position */
1474
1475     return infoPtr->CurVal;
1476 }
1477
1478
1479 /*************************************************************************
1480  *           GetScrollInfo16   (USER.476)
1481  */
1482 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1483 {
1484     return GetScrollInfo( hwnd, nBar, info );
1485 }
1486
1487
1488 /*************************************************************************
1489  *           GetScrollInfo   (USER32.284)
1490  * GetScrollInfo can be used to retrieve the position, upper bound,
1491  * lower bound, and page size of a scrollbar control.
1492  *
1493  * RETURNS STD
1494  */
1495 BOOL WINAPI GetScrollInfo(
1496   HWND hwnd /* [in] Handle of window */ ,
1497   INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1498   LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1499 {
1500     SCROLLBAR_INFO *infoPtr;
1501
1502     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1503     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1504     if ((info->cbSize != sizeof(*info)) &&
1505         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1506
1507     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1508     if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1509     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1510         info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : infoPtr->CurVal;
1511     if (info->fMask & SIF_RANGE)
1512     {
1513         info->nMin = infoPtr->MinVal;
1514         info->nMax = infoPtr->MaxVal;
1515     }
1516     return (info->fMask & SIF_ALL) != 0;
1517 }
1518
1519
1520 /*************************************************************************
1521  *           SetScrollPos16   (USER.62)
1522  */
1523 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1524                              BOOL16 bRedraw )
1525 {
1526     return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1527 }
1528
1529
1530 /*************************************************************************
1531  *           SetScrollPos   (USER32.502)
1532  *
1533  * RETURNS
1534  *    Success: Scrollbar position
1535  *    Failure: 0
1536  *
1537  * REMARKS
1538  *    Note the ambiguity when 0 is returned.  Use GetLastError
1539  *    to make sure there was an error (and to know which one).
1540  */
1541 INT WINAPI SetScrollPos(
1542 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1543 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1544 INT nPos /* [in] New value */,
1545 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1546 {
1547     SCROLLINFO info;
1548     SCROLLBAR_INFO *infoPtr;
1549     INT oldPos;
1550
1551     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1552     oldPos      = infoPtr->CurVal;
1553     info.cbSize = sizeof(info);
1554     info.nPos   = nPos;
1555     info.fMask  = SIF_POS;
1556     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1557     return oldPos;
1558 }
1559
1560
1561 /*************************************************************************
1562  *           GetScrollPos16   (USER.63)
1563  */
1564 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1565 {
1566     return (INT16)GetScrollPos( hwnd, nBar );
1567 }
1568
1569
1570 /*************************************************************************
1571  *           GetScrollPos   (USER32.285)
1572  *
1573  * RETURNS
1574  *    Success: Current position
1575  *    Failure: 0
1576  *
1577  * REMARKS
1578  *    Note the ambiguity when 0 is returned.  Use GetLastError
1579  *    to make sure there was an error (and to know which one).
1580  */
1581 INT WINAPI GetScrollPos(
1582 HWND hwnd, /* [in] Handle of window */
1583 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1584 {
1585     SCROLLBAR_INFO *infoPtr;
1586
1587     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1588     return infoPtr->CurVal;
1589 }
1590
1591
1592 /*************************************************************************
1593  *           SetScrollRange16   (USER.64)
1594  */
1595 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1596                               INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1597 {
1598     /* Invalid range -> range is set to (0,0) */
1599     if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1600     SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1601 }
1602
1603
1604 /*************************************************************************
1605  *           SetScrollRange   (USER32.503)
1606  *
1607  * RETURNS STD
1608  */
1609 BOOL WINAPI SetScrollRange(
1610 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1611 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1612 INT MinVal, /* [in] New minimum value */
1613 INT MaxVal, /* [in] New maximum value */
1614 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1615 {
1616     SCROLLINFO info;
1617
1618     info.cbSize = sizeof(info);
1619     info.nMin   = MinVal;
1620     info.nMax   = MaxVal;
1621     info.fMask  = SIF_RANGE;
1622     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1623     return TRUE;
1624 }
1625
1626
1627 /*************************************************************************
1628  *           SCROLL_SetNCSbState
1629  *
1630  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1631  */
1632 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1633                                        int hMin, int hMax, int hPos)
1634 {
1635     INT vA, hA;
1636     SCROLLINFO vInfo, hInfo;
1637
1638     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1639     vInfo.nMin   = vMin;         hInfo.nMin   = hMin;
1640     vInfo.nMax   = vMax;         hInfo.nMax   = hMax;
1641     vInfo.nPos   = vPos;         hInfo.nPos   = hPos;
1642     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1643
1644     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1645     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1646
1647     if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1648                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1649     {
1650         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1651         if( vA & SA_SSI_REFRESH )
1652             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1653
1654         if( hA & SA_SSI_REFRESH )
1655             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1656     }
1657     return 0;
1658 }
1659
1660
1661 /*************************************************************************
1662  *           GetScrollRange16   (USER.65)
1663  */
1664 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1665                                 LPINT16 lpMin, LPINT16 lpMax)
1666 {
1667     INT min, max;
1668     BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1669     if (lpMin) *lpMin = min;
1670     if (lpMax) *lpMax = max;
1671     return ret;
1672 }
1673
1674
1675 /*************************************************************************
1676  *           GetScrollRange   (USER32.286)
1677  *
1678  * RETURNS STD
1679  */
1680 BOOL WINAPI GetScrollRange(
1681 HWND hwnd, /* [in] Handle of window */
1682 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL  */
1683 LPINT lpMin, /* [out] Where to store minimum value */
1684 LPINT lpMax /* [out] Where to store maximum value */)
1685 {
1686     SCROLLBAR_INFO *infoPtr;
1687
1688     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1689     {
1690         if (lpMin) lpMin = 0;
1691         if (lpMax) lpMax = 0;
1692         return FALSE;
1693     }
1694     if (lpMin) *lpMin = infoPtr->MinVal;
1695     if (lpMax) *lpMax = infoPtr->MaxVal;
1696     return TRUE;
1697 }
1698
1699
1700 /*************************************************************************
1701  *           SCROLL_ShowScrollBar()
1702  *
1703  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1704  */
1705 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1706                              BOOL fShowH, BOOL fShowV )
1707 {
1708     WND *wndPtr = WIN_FindWndPtr( hwnd );
1709     BOOL retvalue = FALSE;
1710
1711     if (!wndPtr) return FALSE;
1712     TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1713                     hwnd, nBar, fShowH, fShowV );
1714
1715     switch(nBar)
1716     {
1717     case SB_CTL:
1718         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1719         retvalue = TRUE;
1720         goto END;
1721
1722     case SB_BOTH:
1723     case SB_HORZ:
1724         if (fShowH)
1725         {
1726             fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1727             wndPtr->dwStyle |= WS_HSCROLL;
1728         }
1729         else  /* hide it */
1730         {
1731             fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1732             wndPtr->dwStyle &= ~WS_HSCROLL;
1733         }
1734         if( nBar == SB_HORZ ) {
1735             fShowV = FALSE;
1736             break;
1737         }
1738         /* fall through */
1739
1740     case SB_VERT:
1741         if (fShowV)
1742         {
1743             fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1744             wndPtr->dwStyle |= WS_VSCROLL;
1745         }
1746         else  /* hide it */
1747         {
1748             fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1749             wndPtr->dwStyle &= ~WS_VSCROLL;
1750         }
1751         if ( nBar == SB_VERT )
1752            fShowH = FALSE;
1753         break;
1754
1755     default:
1756         retvalue = FALSE;  /* Nothing to do! */
1757         goto END;
1758     }
1759
1760     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1761     {
1762         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1763                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1764         retvalue = TRUE;
1765         goto END;
1766     }
1767
1768     retvalue = FALSE; /* no frame changes */
1769 END:
1770     WIN_ReleaseWndPtr(wndPtr);
1771     return retvalue;
1772 }
1773
1774
1775 /*************************************************************************
1776  *           ShowScrollBar16   (USER.267)
1777  */
1778 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1779 {
1780     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1781                                       (nBar == SB_HORZ) ? 0 : fShow );
1782 }
1783
1784
1785 /*************************************************************************
1786  *           ShowScrollBar   (USER32.532)
1787  *
1788  * RETURNS STD
1789  */
1790 BOOL WINAPI ShowScrollBar(
1791 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected   */
1792 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1793 BOOL fShow /* [in] TRUE = show, FALSE = hide  */)
1794 {
1795     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1796                                       (nBar == SB_HORZ) ? 0 : fShow );
1797     return TRUE;
1798 }
1799
1800
1801 /*************************************************************************
1802  *           EnableScrollBar16   (USER.482)
1803  */
1804 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1805 {
1806     return EnableScrollBar( hwnd, nBar, flags );
1807 }
1808
1809
1810 /*************************************************************************
1811  *           EnableScrollBar   (USER32.171)
1812  */
1813 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1814 {
1815     BOOL bFineWithMe;
1816     SCROLLBAR_INFO *infoPtr;
1817
1818     TRACE("%04x %d %d\n", hwnd, nBar, flags );
1819
1820     flags &= ESB_DISABLE_BOTH;
1821
1822     if (nBar == SB_BOTH)
1823     {
1824         if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1825         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1826         {
1827             infoPtr->flags = flags;
1828             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1829         }
1830         nBar = SB_HORZ;
1831     }
1832     else
1833         bFineWithMe = TRUE;
1834
1835     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1836     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1837     infoPtr->flags = flags;
1838
1839     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1840     return TRUE;
1841 }