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

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