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  * This library is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU Lesser General Public
   9  * License as published by the Free Software Foundation; either
  10  * version 2.1 of the License, or (at your option) any later version.
  11  *
  12  * This library is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * Lesser General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU Lesser General Public
  18  * License along with this library; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  20  */
  21
  22 #include "windef.h"
  23 #include "wingdi.h"
  24 #include "wine/winuser16.h"
  25 #include "controls.h"
  26 #include "win.h"
  27 #include "wine/debug.h"
  28 #include "user.h"
  29 #include "message.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(scroll);
  32
  33 typedef struct
  34 {
  35     INT   curVal;   /* Current scroll-bar value */
  36     INT   minVal;   /* Minimum scroll-bar value */
  37     INT   maxVal;   /* Maximum scroll-bar value */
  38     INT   page;     /* Page size of scroll bar (Win32) */
  39     UINT  flags;    /* EnableScrollBar flags */
  40 } SCROLLBAR_INFO;
  41
  42
  43 static HBITMAP hUpArrow;
  44 static HBITMAP hDnArrow;
  45 static HBITMAP hLfArrow;
  46 static HBITMAP hRgArrow;
  47 static HBITMAP hUpArrowD;
  48 static HBITMAP hDnArrowD;
  49 static HBITMAP hLfArrowD;
  50 static HBITMAP hRgArrowD;
  51 static HBITMAP hUpArrowI;
  52 static HBITMAP hDnArrowI;
  53 static HBITMAP hLfArrowI;
  54 static HBITMAP hRgArrowI;
  55
  56 #define TOP_ARROW(flags,pressed) \
  57    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  58 #define BOTTOM_ARROW(flags,pressed) \
  59    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  60 #define LEFT_ARROW(flags,pressed) \
  61    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  62 #define RIGHT_ARROW(flags,pressed) \
  63    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  64
  65
  66   /* Minimum size of the rectangle between the arrows */
  67 #define SCROLL_MIN_RECT  4
  68
  69   /* Minimum size of the thumb in pixels */
  70 #define SCROLL_MIN_THUMB 6
  71
  72   /* Overlap between arrows and thumb */
  73 #define SCROLL_ARROW_THUMB_OVERLAP ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
  74
  75   /* Delay (in ms) before first repetition when holding the button down */
  76 #define SCROLL_FIRST_DELAY   200
  77
  78   /* Delay (in ms) between scroll repetitions */
  79 #define SCROLL_REPEAT_DELAY  50
  80
  81   /* Scroll timer id */
  82 #define SCROLL_TIMER   0
  83
  84   /* Scroll-bar hit testing */
  85 enum SCROLL_HITTEST
  86 {
  87     SCROLL_NOWHERE,      /* Outside the scroll bar */
  88     SCROLL_TOP_ARROW,    /* Top or left arrow */
  89     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  90     SCROLL_THUMB,        /* Thumb rectangle */
  91     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  92     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  93 };
  94
  95  /* What to do after SCROLL_SetScrollInfo() */
  96 #define SA_SSI_HIDE             0x0001
  97 #define SA_SSI_SHOW             0x0002
  98 #define SA_SSI_REFRESH          0x0004
  99 #define SA_SSI_REPAINT_ARROWS   0x0008
 100
 101  /* Thumb-tracking info */
 102 static HWND SCROLL_TrackingWin = 0;
 103 static INT  SCROLL_TrackingBar = 0;
 104 static INT  SCROLL_TrackingPos = 0;
 105 static INT  SCROLL_TrackingVal = 0;
 106  /* Hit test code of the last button-down event */
 107 static enum SCROLL_HITTEST SCROLL_trackHitTest;
 108 static BOOL SCROLL_trackVertical;
 109
 110  /* Is the moving thumb being displayed? */
 111 static BOOL SCROLL_MovingThumb = FALSE;
 112
 113  /* Local functions */
 114 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
 115                                     BOOL fShowH, BOOL fShowV );
 116 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
 117                                    const SCROLLINFO *info, INT *action );
 118 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 119                                     RECT *rect, INT arrowSize,
 120                                     INT thumbSize, INT thumbPos,
 121                                     UINT flags, BOOL vertical,
 122                                     BOOL top_selected, BOOL bottom_selected );
 123 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam );
 124
 125
 126 /*********************************************************************
 127  * scrollbar class descriptor
 128  */
 129 const struct builtin_class_descr SCROLL_builtin_class =
 130 {
 131     "ScrollBar",            /* name */
 132     CS_GLOBALCLASS | CS_DBLCLKS | CS_VREDRAW | CS_HREDRAW | CS_PARENTDC, /* style  */
 133     NULL,                   /* procA (winproc is Unicode only) */
 134     ScrollBarWndProc,       /* procW */
 135     sizeof(SCROLLBAR_INFO), /* extra */
 136     IDC_ARROWA,             /* cursor */
 137     0                       /* brush */
 138 };
 139
 140
 141 /***********************************************************************
 142  *           SCROLL_LoadBitmaps
 143  */
 144 static void SCROLL_LoadBitmaps(void)
 145 {
 146     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 147     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 148     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 149     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 150     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 151     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 152     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 153     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 154     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 155     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 156     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 157     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 158 }
 159
 160
 161 /***********************************************************************
 162  *           SCROLL_GetScrollInfo
 163  */
 164 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
 165 {
 166     SCROLLBAR_INFO *infoPtr;
 167     WND *wndPtr = WIN_FindWndPtr( hwnd );
 168
 169     if (!wndPtr) return NULL;
 170     switch(nBar)
 171     {
 172         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 173         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 174         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 175         default:
 176             WIN_ReleaseWndPtr( wndPtr );
 177             return NULL;
 178     }
 179
 180     if (!infoPtr)  /* Create the info structure if needed */
 181     {
 182         if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
 183         {
 184             infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
 185             infoPtr->maxVal = 100;
 186             infoPtr->flags  = ESB_ENABLE_BOTH;
 187             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 188             else wndPtr->pVScroll = infoPtr;
 189         }
 190         if (!hUpArrow) SCROLL_LoadBitmaps();
 191     }
 192     WIN_ReleaseWndPtr( wndPtr );
 193     return infoPtr;
 194 }
 195
 196
 197 /***********************************************************************
 198  *           SCROLL_GetScrollBarRect
 199  *
 200  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 201  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 202  * 'arrowSize' returns the width or height of an arrow (depending on
 203  * the orientation of the scrollbar), 'thumbSize' returns the size of
 204  * the thumb, and 'thumbPos' returns the position of the thumb
 205  * relative to the left or to the top.
 206  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 207  */
 208 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 209                                        INT *arrowSize, INT *thumbSize,
 210                                        INT *thumbPos )
 211 {
 212     INT pixels;
 213     BOOL vertical;
 214     WND *wndPtr = WIN_FindWndPtr( hwnd );
 215
 216     switch(nBar)
 217     {
 218       case SB_HORZ:
 219         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 220         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 221         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 222         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 223         if(wndPtr->dwStyle & WS_BORDER) {
 224           lprect->left--;
 225           lprect->right++;
 226         } else if(wndPtr->dwStyle & WS_VSCROLL)
 227           lprect->right++;
 228         vertical = FALSE;
 229         break;
 230
 231       case SB_VERT:
 232         if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
 233             lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
 234         else
 235             lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 236         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 237         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 238         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 239         if(wndPtr->dwStyle & WS_BORDER) {
 240           lprect->top--;
 241           lprect->bottom++;
 242         } else if(wndPtr->dwStyle & WS_HSCROLL)
 243           lprect->bottom++;
 244         vertical = TRUE;
 245         break;
 246
 247       case SB_CTL:
 248         GetClientRect( hwnd, lprect );
 249         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 250         break;
 251
 252     default:
 253         WIN_ReleaseWndPtr(wndPtr);
 254         return FALSE;
 255     }
 256
 257     if (vertical) pixels = lprect->bottom - lprect->top;
 258     else pixels = lprect->right - lprect->left;
 259
 260     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 261     {
 262         if (pixels > SCROLL_MIN_RECT)
 263             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 264         else
 265             *arrowSize = 0;
 266         *thumbPos = *thumbSize = 0;
 267     }
 268     else
 269     {
 270         SCROLLBAR_INFO *info = SCROLL_GetScrollInfo( hwnd, nBar );
 271
 272         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 273         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 274
 275         if (info->page)
 276         {
 277             *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
 278             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 279         }
 280         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 281
 282         if (((pixels -= *thumbSize ) < 0) ||
 283             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 284         {
 285             /* Rectangle too small or scrollbar disabled -> no thumb */
 286             *thumbPos = *thumbSize = 0;
 287         }
 288         else
 289         {
 290             INT max = info->maxVal - max( info->page-1, 0 );
 291             if (info->minVal >= max)
 292                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 293             else
 294                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 295                   + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
 296         }
 297     }
 298     WIN_ReleaseWndPtr(wndPtr);
 299     return vertical;
 300 }
 301
 302
 303 /***********************************************************************
 304  *           SCROLL_GetThumbVal
 305  *
 306  * Compute the current scroll position based on the thumb position in pixels
 307  * from the top of the scroll-bar.
 308  */
 309 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 310                                   BOOL vertical, INT pos )
 311 {
 312     INT thumbSize;
 313     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 314
 315     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 316         return infoPtr->minVal;
 317
 318     if (infoPtr->page)
 319     {
 320         thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
 321         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 322     }
 323     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 324
 325     if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
 326
 327     pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 328     if (pos > pixels) pos = pixels;
 329
 330     if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
 331     else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
 332     return infoPtr->minVal + ((pos + pixels / 2) / pixels);
 333 }
 334
 335 /***********************************************************************
 336  *           SCROLL_PtInRectEx
 337  */
 338 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 339 {
 340     RECT rect = *lpRect;
 341
 342     if (vertical)
 343     {
 344         rect.left -= lpRect->right - lpRect->left;
 345         rect.right += lpRect->right - lpRect->left;
 346     }
 347     else
 348     {
 349         rect.top -= lpRect->bottom - lpRect->top;
 350         rect.bottom += lpRect->bottom - lpRect->top;
 351     }
 352     return PtInRect( &rect, pt );
 353 }
 354
 355 /***********************************************************************
 356  *           SCROLL_ClipPos
 357  */
 358 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 359 {
 360     if( pt.x < lpRect->left )
 361         pt.x = lpRect->left;
 362     else
 363     if( pt.x > lpRect->right )
 364         pt.x = lpRect->right;
 365
 366     if( pt.y < lpRect->top )
 367         pt.y = lpRect->top;
 368     else
 369     if( pt.y > lpRect->bottom )
 370         pt.y = lpRect->bottom;
 371
 372     return pt;
 373 }
 374
 375
 376 /***********************************************************************
 377  *           SCROLL_HitTest
 378  *
 379  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 380  */
 381 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 382                                            POINT pt, BOOL bDragging )
 383 {
 384     INT arrowSize, thumbSize, thumbPos;
 385     RECT rect;
 386
 387     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 388                                            &arrowSize, &thumbSize, &thumbPos );
 389
 390     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 391          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 392
 393     if (vertical)
 394     {
 395         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 396         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 397         if (!thumbPos) return SCROLL_TOP_RECT;
 398         pt.y -= rect.top;
 399         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 400         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 401     }
 402     else  /* horizontal */
 403     {
 404         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 405         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 406         if (!thumbPos) return SCROLL_TOP_RECT;
 407         pt.x -= rect.left;
 408         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 409         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 410     }
 411     return SCROLL_THUMB;
 412 }
 413
 414
 415 /***********************************************************************
 416  *           SCROLL_DrawArrows
 417  *
 418  * Draw the scroll bar arrows.
 419  */
 420 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
 421                                   RECT *rect, INT arrowSize, BOOL vertical,
 422                                   BOOL top_pressed, BOOL bottom_pressed )
 423 {
 424   RECT r;
 425
 426   r = *rect;
 427   if( vertical )
 428     r.bottom = r.top + arrowSize;
 429   else
 430     r.right = r.left + arrowSize;
 431
 432   DrawFrameControl( hdc, &r, DFC_SCROLL,
 433                     (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
 434                     | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 435                     | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
 436
 437   r = *rect;
 438   if( vertical )
 439     r.top = r.bottom-arrowSize;
 440   else
 441     r.left = r.right-arrowSize;
 442
 443   DrawFrameControl( hdc, &r, DFC_SCROLL,
 444                     (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
 445                     | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 446                     | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
 447 }
 448
 449 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
 450                                   RECT *rect, INT arrowSize, BOOL vertical,
 451                                   BOOL top_pressed, BOOL bottom_pressed )
 452 {
 453     HDC hdcMem = CreateCompatibleDC( hdc );
 454     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 455                                     TOP_ARROW(infoPtr->flags, top_pressed)
 456                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 457
 458     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 459     StretchBlt( hdc, rect->left, rect->top,
 460                   vertical ? rect->right-rect->left : arrowSize,
 461                   vertical ? arrowSize : rect->bottom-rect->top,
 462                   hdcMem, 0, 0,
 463                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 464                   SRCCOPY );
 465
 466     SelectObject( hdcMem, vertical ?
 467                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 468                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 469     if (vertical)
 470         StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
 471                       rect->right - rect->left, arrowSize,
 472                       hdcMem, 0, 0,
 473                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 474                       SRCCOPY );
 475     else
 476         StretchBlt( hdc, rect->right - arrowSize, rect->top,
 477                       arrowSize, rect->bottom - rect->top,
 478                       hdcMem, 0, 0,
 479                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 480                       SRCCOPY );
 481     SelectObject( hdcMem, hbmpPrev );
 482     DeleteDC( hdcMem );
 483 }
 484
 485 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 486                                RECT *rect, INT arrowSize, BOOL vertical,
 487                                BOOL top_pressed, BOOL bottom_pressed )
 488 {
 489   if( TWEAK_WineLook == WIN31_LOOK )
 490     SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
 491                           vertical, top_pressed,bottom_pressed );
 492   else
 493     SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
 494                           vertical, top_pressed,bottom_pressed );
 495 }
 496
 497
 498 /***********************************************************************
 499  *           SCROLL_DrawMovingThumb
 500  *
 501  * Draw the moving thumb rectangle.
 502  */
 503 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
 504                                        INT arrowSize, INT thumbSize )
 505 {
 506     RECT r = *rect;
 507     if (vertical)
 508     {
 509         r.top += SCROLL_TrackingPos;
 510         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 511             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 512         if (r.top + thumbSize >
 513                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 514             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 515                                                                   - thumbSize;
 516         r.bottom = r.top + thumbSize;
 517     }
 518     else
 519     {
 520         r.left += SCROLL_TrackingPos;
 521         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 522             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 523         if (r.left + thumbSize >
 524                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 525             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 526                                                                   - thumbSize;
 527         r.right = r.left + thumbSize;
 528     }
 529
 530     DrawFocusRect( hdc, &r );
 531     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 532 }
 533
 534 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
 535                                        INT arrowSize, INT thumbSize )
 536 {
 537   INT pos = SCROLL_TrackingPos;
 538   INT max_size;
 539
 540   if( vertical )
 541     max_size = rect->bottom - rect->top;
 542   else
 543     max_size = rect->right - rect->left;
 544
 545   max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
 546
 547   if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
 548     pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
 549   else if( pos > max_size )
 550     pos = max_size;
 551
 552   SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
 553                           rect, arrowSize, thumbSize, pos,
 554                           0, vertical, FALSE, FALSE );
 555
 556   SCROLL_MovingThumb = !SCROLL_MovingThumb;
 557 }
 558
 559 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 560                                     INT arrowSize, INT thumbSize )
 561 {
 562   if( TWEAK_WineLook == WIN31_LOOK )
 563     SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
 564   else
 565     SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
 566 }
 567
 568 /***********************************************************************
 569  *           SCROLL_DrawInterior
 570  *
 571  * Draw the scroll bar interior (everything except the arrows).
 572  */
 573 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 574                                     RECT *rect, INT arrowSize,
 575                                     INT thumbSize, INT thumbPos,
 576                                     UINT flags, BOOL vertical,
 577                                     BOOL top_selected, BOOL bottom_selected )
 578 {
 579     RECT r;
 580     HPEN hSavePen;
 581     HBRUSH hSaveBrush,hBrush;
 582
 583     /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 584      * The window-owned scrollbars need to call DEFWND_ControlColor
 585      * to correctly setup default scrollbar colors
 586      */
 587     if (nBar == SB_CTL)
 588     {
 589       hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 590                                      (WPARAM)hdc,(LPARAM)hwnd);
 591     }
 592     else
 593     {
 594       hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 595     }
 596
 597     hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
 598     hSaveBrush = SelectObject( hdc, hBrush );
 599
 600     /* Calculate the scroll rectangle */
 601     r = *rect;
 602     if (vertical)
 603     {
 604         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 605         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 606     }
 607     else
 608     {
 609         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 610         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 611     }
 612
 613     /* Draw the scroll rectangles and thumb */
 614     if (!thumbPos)  /* No thumb to draw */
 615     {
 616         PatBlt( hdc, r.left, r.top,
 617                      r.right - r.left, r.bottom - r.top,
 618                      PATCOPY );
 619
 620         /* cleanup and return */
 621         SelectObject( hdc, hSavePen );
 622         SelectObject( hdc, hSaveBrush );
 623         return;
 624     }
 625
 626     if (vertical)
 627     {
 628         PatBlt( hdc, r.left, r.top,
 629                   r.right - r.left,
 630                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 631                   top_selected ? 0x0f0000 : PATCOPY );
 632         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 633         PatBlt( hdc, r.left, r.top + thumbSize,
 634                   r.right - r.left,
 635                   r.bottom - r.top - thumbSize,
 636                   bottom_selected ? 0x0f0000 : PATCOPY );
 637         r.bottom = r.top + thumbSize;
 638     }
 639     else  /* horizontal */
 640     {
 641         PatBlt( hdc, r.left, r.top,
 642                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 643                   r.bottom - r.top,
 644                   top_selected ? 0x0f0000 : PATCOPY );
 645         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 646         PatBlt( hdc, r.left + thumbSize, r.top,
 647                   r.right - r.left - thumbSize,
 648                   r.bottom - r.top,
 649                   bottom_selected ? 0x0f0000 : PATCOPY );
 650         r.right = r.left + thumbSize;
 651     }
 652
 653     /* Draw the thumb */
 654     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE  );
 655
 656     /* cleanup */
 657     SelectObject( hdc, hSavePen );
 658     SelectObject( hdc, hSaveBrush );
 659 }
 660
 661
 662 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 663                                  RECT *rect, INT arrowSize,
 664                                  INT thumbSize, INT thumbPos,
 665                                  UINT flags, BOOL vertical,
 666                                  BOOL top_selected, BOOL bottom_selected )
 667 {
 668     RECT r;
 669     HPEN hSavePen;
 670     HBRUSH hSaveBrush,hBrush;
 671     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 672
 673     if (Save_SCROLL_MovingThumb &&
 674         (SCROLL_TrackingWin == hwnd) &&
 675         (SCROLL_TrackingBar == nBar))
 676         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 677
 678       /* Select the correct brush and pen */
 679
 680     if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 681     {
 682         /* This ought to be the color of the parent window */
 683         hBrush = GetSysColorBrush(COLOR_WINDOW);
 684     }
 685     else
 686     {
 687         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 688          * The window-owned scrollbars need to call DEFWND_ControlColor
 689          * to correctly setup default scrollbar colors
 690          */
 691         if (nBar == SB_CTL) {
 692             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 693                                            (WPARAM)hdc,(LPARAM)hwnd);
 694         } else {
 695             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 696         }
 697     }
 698     hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
 699     hSaveBrush = SelectObject( hdc, hBrush );
 700
 701       /* Calculate the scroll rectangle */
 702
 703     r = *rect;
 704     if (vertical)
 705     {
 706         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 707         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 708     }
 709     else
 710     {
 711         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 712         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 713     }
 714
 715       /* Draw the scroll bar frame */
 716
 717         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 718     if (TWEAK_WineLook == WIN31_LOOK)
 719         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 720
 721       /* Draw the scroll rectangles and thumb */
 722
 723     if (!thumbPos)  /* No thumb to draw */
 724     {
 725         INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
 726
 727         PatBlt( hdc, r.left+offset, r.top+offset,
 728                      r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
 729                      PATCOPY );
 730
 731         /* cleanup and return */
 732         SelectObject( hdc, hSavePen );
 733         SelectObject( hdc, hSaveBrush );
 734         return;
 735     }
 736
 737     if (vertical)
 738     {
 739         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 740
 741         PatBlt( hdc, r.left + offset, r.top + offset,
 742                   r.right - r.left - offset*2,
 743                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
 744                   top_selected ? 0x0f0000 : PATCOPY );
 745         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 746         PatBlt( hdc, r.left + offset, r.top + thumbSize,
 747                   r.right - r.left - offset*2,
 748                   r.bottom - r.top - thumbSize - offset,
 749                   bottom_selected ? 0x0f0000 : PATCOPY );
 750         r.bottom = r.top + thumbSize;
 751     }
 752     else  /* horizontal */
 753     {
 754         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 755
 756         PatBlt( hdc, r.left + offset, r.top + offset,
 757                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 758                   r.bottom - r.top - offset*2,
 759                   top_selected ? 0x0f0000 : PATCOPY );
 760         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 761         PatBlt( hdc, r.left + thumbSize, r.top + offset,
 762                   r.right - r.left - thumbSize - offset,
 763                   r.bottom - r.top - offset*2,
 764                   bottom_selected ? 0x0f0000 : PATCOPY );
 765         r.right = r.left + thumbSize;
 766     }
 767
 768       /* Draw the thumb */
 769
 770     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 771     if (TWEAK_WineLook == WIN31_LOOK)
 772     {
 773         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 774         r.top++, r.left++;
 775     }
 776     else
 777     {
 778         Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
 779     }
 780     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 781
 782     if (Save_SCROLL_MovingThumb &&
 783         (SCROLL_TrackingWin == hwnd) &&
 784         (SCROLL_TrackingBar == nBar))
 785         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 786
 787     /* cleanup */
 788     SelectObject( hdc, hSavePen );
 789     SelectObject( hdc, hSaveBrush );
 790 }
 791
 792
 793 /***********************************************************************
 794  *           SCROLL_DrawScrollBar
 795  *
 796  * Redraw the whole scrollbar.
 797  */
 798 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 799                            BOOL arrows, BOOL interior )
 800 {
 801     INT arrowSize, thumbSize, thumbPos;
 802     RECT rect;
 803     BOOL vertical;
 804     WND *wndPtr = WIN_FindWndPtr( hwnd );
 805     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 806     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 807
 808     if (!wndPtr || !infoPtr ||
 809         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 810         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 811     if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
 812     hwnd = wndPtr->hwndSelf;  /* make it a full handle */
 813
 814     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 815                                         &arrowSize, &thumbSize, &thumbPos );
 816
 817     /* do not draw if the scrollbar rectangle is empty */
 818     if(IsRectEmpty(&rect))
 819       goto END;
 820
 821     if (Save_SCROLL_MovingThumb &&
 822         (SCROLL_TrackingWin == hwnd) &&
 823         (SCROLL_TrackingBar == nBar))
 824         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 825
 826       /* Draw the arrows */
 827
 828     if (arrows && arrowSize)
 829     {
 830         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 831             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 832                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 833                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 834         else
 835             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 836                                                                FALSE, FALSE );
 837     }
 838     if( interior )
 839         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 840                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 841
 842     if (Save_SCROLL_MovingThumb &&
 843         (SCROLL_TrackingWin == hwnd) &&
 844         (SCROLL_TrackingBar == nBar))
 845         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 846
 847     /* if scroll bar has focus, reposition the caret */
 848     if(hwnd==GetFocus() && (nBar==SB_CTL))
 849     {
 850         if (!vertical)
 851         {
 852             SetCaretPos(thumbPos+1, rect.top+1);
 853         }
 854         else
 855         {
 856             SetCaretPos(rect.top+1, thumbPos+1);
 857         }
 858     }
 859
 860 END:
 861     WIN_ReleaseWndPtr(wndPtr);
 862 }
 863
 864
 865 /***********************************************************************
 866  *           SCROLL_RefreshScrollBar
 867  *
 868  * Repaint the scroll bar interior after a SetScrollRange() or
 869  * SetScrollPos() call.
 870  */
 871 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 872                                      BOOL arrows, BOOL interior )
 873 {
 874     HDC hdc = GetDCEx( hwnd, 0,
 875                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 876     if (!hdc) return;
 877
 878     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 879     ReleaseDC( hwnd, hdc );
 880 }
 881
 882
 883 /***********************************************************************
 884  *           SCROLL_HandleKbdEvent
 885  *
 886  * Handle a keyboard event (only for SB_CTL scrollbars).
 887  */
 888 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
 889 {
 890     WPARAM msg;
 891
 892     switch(wParam)
 893     {
 894     case VK_PRIOR: msg = SB_PAGEUP; break;
 895     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 896     case VK_HOME:  msg = SB_TOP; break;
 897     case VK_END:   msg = SB_BOTTOM; break;
 898     case VK_UP:    msg = SB_LINEUP; break;
 899     case VK_DOWN:  msg = SB_LINEDOWN; break;
 900     default: return;
 901     }
 902     SendMessageW( GetParent(hwnd),
 903                   (GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 904                   msg, (LPARAM)hwnd );
 905 }
 906
 907
 908 /***********************************************************************
 909  *           SCROLL_HandleScrollEvent
 910  *
 911  * Handle a mouse or timer event for the scrollbar.
 912  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 913  * windows coordinates.
 914  */
 915 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 916 {
 917       /* Previous mouse position for timer events */
 918     static POINT prevPt;
 919       /* Thumb position when tracking started. */
 920     static UINT trackThumbPos;
 921       /* Position in the scroll-bar of the last button-down event. */
 922     static INT lastClickPos;
 923       /* Position in the scroll-bar of the last mouse event. */
 924     static INT lastMousePos;
 925
 926     enum SCROLL_HITTEST hittest;
 927     HWND hwndOwner, hwndCtl;
 928     BOOL vertical;
 929     INT arrowSize, thumbSize, thumbPos;
 930     RECT rect;
 931     HDC hdc;
 932
 933     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 934     if (!infoPtr) return;
 935     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 936                   return;
 937
 938     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 939     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 940                                         &arrowSize, &thumbSize, &thumbPos );
 941     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 942     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 943
 944     switch(msg)
 945     {
 946       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 947           HideCaret(hwnd);  /* hide caret while holding down LBUTTON */
 948           SCROLL_trackVertical = vertical;
 949           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 950           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 951           lastMousePos  = lastClickPos;
 952           trackThumbPos = thumbPos;
 953           prevPt = pt;
 954           if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
 955           SetCapture( hwnd );
 956           break;
 957
 958       case WM_MOUSEMOVE:
 959           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 960           prevPt = pt;
 961           break;
 962
 963       case WM_LBUTTONUP:
 964           hittest = SCROLL_NOWHERE;
 965           ReleaseCapture();
 966           /* if scrollbar has focus, show back caret */
 967           if (hwnd==GetFocus()) ShowCaret(hwnd);
 968           break;
 969
 970       case WM_SYSTIMER:
 971           pt = prevPt;
 972           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 973           break;
 974
 975       default:
 976           return;  /* Should never happen */
 977     }
 978
 979     TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
 980           hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
 981
 982     switch(SCROLL_trackHitTest)
 983     {
 984     case SCROLL_NOWHERE:  /* No tracking in progress */
 985         break;
 986
 987     case SCROLL_TOP_ARROW:
 988         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 989                            (hittest == SCROLL_trackHitTest), FALSE );
 990         if (hittest == SCROLL_trackHitTest)
 991         {
 992             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 993             {
 994                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 995                                 SB_LINEUP, (LPARAM)hwndCtl );
 996             }
 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_TOP_RECT:
1006         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1007                              thumbPos, infoPtr->flags, vertical,
1008                              (hittest == SCROLL_trackHitTest), FALSE );
1009         if (hittest == SCROLL_trackHitTest)
1010         {
1011             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1012             {
1013                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1014                                 SB_PAGEUP, (LPARAM)hwndCtl );
1015             }
1016             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1017                               SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1018                               (TIMERPROC)0 );
1019         }
1020         else KillSystemTimer( hwnd, SCROLL_TIMER );
1021         break;
1022
1023     case SCROLL_THUMB:
1024         if (msg == WM_LBUTTONDOWN)
1025         {
1026             SCROLL_TrackingWin = hwnd;
1027             SCROLL_TrackingBar = nBar;
1028             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1029             SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1030                                                         vertical,
1031                                                         SCROLL_TrackingPos );
1032             if (!SCROLL_MovingThumb)
1033                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1034         }
1035         else if (msg == WM_LBUTTONUP)
1036         {
1037             if (SCROLL_MovingThumb)
1038                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1039             SCROLL_TrackingWin = 0;
1040             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1041                                  thumbPos, infoPtr->flags, vertical,
1042                                  FALSE, FALSE );
1043         }
1044         else  /* WM_MOUSEMOVE */
1045         {
1046             UINT pos;
1047
1048             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1049             else
1050             {
1051                 pt = SCROLL_ClipPos( &rect, pt );
1052                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1053             }
1054             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1055             {
1056                 if (SCROLL_MovingThumb)
1057                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1058                                         arrowSize, thumbSize );
1059                 lastMousePos = pos;
1060                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1061                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1062                                                          vertical,
1063                                                          SCROLL_TrackingPos );
1064                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1065                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1066                                 (LPARAM)hwndCtl );
1067                 if (!SCROLL_MovingThumb)
1068                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1069                                         arrowSize, thumbSize );
1070             }
1071         }
1072         break;
1073
1074     case SCROLL_BOTTOM_RECT:
1075         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1076                              thumbPos, infoPtr->flags, vertical,
1077                              FALSE, (hittest == SCROLL_trackHitTest) );
1078         if (hittest == SCROLL_trackHitTest)
1079         {
1080             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1081             {
1082                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1083                                 SB_PAGEDOWN, (LPARAM)hwndCtl );
1084             }
1085             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1086                               SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1087                               (TIMERPROC)0 );
1088         }
1089         else KillSystemTimer( hwnd, SCROLL_TIMER );
1090         break;
1091
1092     case SCROLL_BOTTOM_ARROW:
1093         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1094                            FALSE, (hittest == SCROLL_trackHitTest) );
1095         if (hittest == SCROLL_trackHitTest)
1096         {
1097             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1098             {
1099                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1100                                 SB_LINEDOWN, (LPARAM)hwndCtl );
1101             }
1102
1103             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1104                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1105                             (TIMERPROC)0 );
1106         }
1107         else KillSystemTimer( hwnd, SCROLL_TIMER );
1108         break;
1109     }
1110
1111     if (msg == WM_LBUTTONDOWN)
1112     {
1113
1114         if (hittest == SCROLL_THUMB)
1115         {
1116             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1117                                  trackThumbPos + lastMousePos - lastClickPos );
1118             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1119                             MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1120         }
1121     }
1122
1123     if (msg == WM_LBUTTONUP)
1124     {
1125         hittest = SCROLL_trackHitTest;
1126         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
1127
1128         if (hittest == SCROLL_THUMB)
1129         {
1130             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1131                                  trackThumbPos + lastMousePos - lastClickPos );
1132             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1133                             MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1134         }
1135         SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1136                           SB_ENDSCROLL, (LPARAM)hwndCtl );
1137     }
1138
1139     ReleaseDC( hwnd, hdc );
1140 }
1141
1142
1143 /***********************************************************************
1144  *           SCROLL_TrackScrollBar
1145  *
1146  * Track a mouse button press on a scroll-bar.
1147  * pt is in screen-coordinates for non-client scroll bars.
1148  */
1149 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1150 {
1151     MSG msg;
1152     INT xoffset = 0, yoffset = 0;
1153
1154     if (scrollbar != SB_CTL)
1155     {
1156         WND *wndPtr = WIN_GetPtr( hwnd );
1157         if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1158         xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1159         yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1160         WIN_ReleasePtr( wndPtr );
1161         ScreenToClient( hwnd, &pt );
1162         pt.x += xoffset;
1163         pt.y += yoffset;
1164     }
1165
1166     SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1167
1168     do
1169     {
1170         if (!GetMessageW( &msg, 0, 0, 0 )) break;
1171         if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1172         switch(msg.message)
1173         {
1174         case WM_LBUTTONUP:
1175         case WM_MOUSEMOVE:
1176         case WM_SYSTIMER:
1177             pt.x = LOWORD(msg.lParam) + xoffset;
1178             pt.y = HIWORD(msg.lParam) + yoffset;
1179             SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1180             break;
1181         default:
1182             TranslateMessage( &msg );
1183             DispatchMessageW( &msg );
1184             break;
1185         }
1186         if (!IsWindow( hwnd ))
1187         {
1188             ReleaseCapture();
1189             break;
1190         }
1191     } while (msg.message != WM_LBUTTONUP);
1192 }
1193
1194
1195 /***********************************************************************
1196  *           ScrollBarWndProc
1197  */
1198 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1199 {
1200     if (!IsWindow( hwnd )) return 0;
1201
1202     switch(message)
1203     {
1204     case WM_CREATE:
1205         {
1206             SCROLLBAR_INFO *infoPtr;
1207             CREATESTRUCTW *lpCreat = (CREATESTRUCTW *)lParam;
1208
1209             if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL ))) return -1;
1210             if (lpCreat->style & WS_DISABLED)
1211             {
1212                 TRACE("Created WS_DISABLED scrollbar\n");
1213                 infoPtr->flags = ESB_DISABLE_BOTH;
1214             }
1215
1216             if (lpCreat->style & SBS_VERT)
1217             {
1218                 if (lpCreat->style & SBS_LEFTALIGN)
1219                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1220                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1221                 else if (lpCreat->style & SBS_RIGHTALIGN)
1222                     MoveWindow( hwnd,
1223                                   lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
1224                                   lpCreat->y,
1225                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
1226             }
1227             else  /* SBS_HORZ */
1228             {
1229                 if (lpCreat->style & SBS_TOPALIGN)
1230                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
1231                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1232                 else if (lpCreat->style & SBS_BOTTOMALIGN)
1233                     MoveWindow( hwnd,
1234                                   lpCreat->x,
1235                                   lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
1236                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
1237             }
1238         }
1239         if (!hUpArrow) SCROLL_LoadBitmaps();
1240         TRACE("ScrollBar creation, hwnd=%p\n", hwnd );
1241         return 0;
1242
1243     case WM_ENABLE:
1244         {
1245             SCROLLBAR_INFO *infoPtr;
1246             if ((infoPtr = SCROLL_GetScrollInfo( hwnd, SB_CTL )))
1247             {
1248                 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1249                 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1250             }
1251         }
1252         return 0;
1253
1254     case WM_LBUTTONDOWN:
1255         {
1256             POINT pt;
1257             pt.x = SLOWORD(lParam);
1258             pt.y = SHIWORD(lParam);
1259             SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1260         }
1261         break;
1262     case WM_LBUTTONUP:
1263     case WM_MOUSEMOVE:
1264     case WM_SYSTIMER:
1265         {
1266             POINT pt;
1267             pt.x = SLOWORD(lParam);
1268             pt.y = SHIWORD(lParam);
1269             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1270         }
1271         break;
1272
1273     /* if key event is received, the scrollbar has the focus */
1274     case WM_KEYDOWN:
1275         /* hide caret on first KEYDOWN to prevent flicker */
1276         if ((lParam & 0x40000000)==0)
1277             HideCaret(hwnd);
1278         SCROLL_HandleKbdEvent( hwnd, wParam );
1279         break;
1280
1281     case WM_KEYUP:
1282         ShowCaret(hwnd);
1283         break;
1284
1285     case WM_SETFOCUS:
1286         {
1287             /* Create a caret when a ScrollBar get focus */
1288             RECT rect;
1289             int arrowSize, thumbSize, thumbPos, vertical;
1290             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1291                                                 &arrowSize, &thumbSize, &thumbPos );
1292             if (!vertical)
1293             {
1294                 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1295                 SetCaretPos(thumbPos+1, rect.top+1);
1296             }
1297             else
1298             {
1299                 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1300                 SetCaretPos(rect.top+1, thumbPos+1);
1301             }
1302             ShowCaret(hwnd);
1303         }
1304         break;
1305
1306     case WM_KILLFOCUS:
1307         {
1308             RECT rect;
1309             int arrowSize, thumbSize, thumbPos, vertical;
1310             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1311             if (!vertical){
1312                 rect.left=thumbPos+1;
1313                 rect.right=rect.left+thumbSize;
1314             }
1315             else
1316             {
1317                 rect.top=thumbPos+1;
1318                 rect.bottom=rect.top+thumbSize;
1319             }
1320             HideCaret(hwnd);
1321             InvalidateRect(hwnd,&rect,0);
1322             DestroyCaret();
1323         }
1324         break;
1325
1326     case WM_ERASEBKGND:
1327          return 1;
1328
1329     case WM_GETDLGCODE:
1330          return DLGC_WANTARROWS; /* Windows returns this value */
1331
1332     case WM_PAINT:
1333         {
1334             PAINTSTRUCT ps;
1335             HDC hdc = BeginPaint( hwnd, &ps );
1336             if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1337                 FillRect( hdc, &ps.rcPaint, GetSysColorBrush(COLOR_SCROLLBAR) );
1338             else
1339                 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1340             EndPaint( hwnd, &ps );
1341         }
1342         break;
1343
1344     case SBM_SETPOS16:
1345     case SBM_SETPOS:
1346         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1347
1348     case SBM_GETPOS16:
1349     case SBM_GETPOS:
1350         return GetScrollPos( hwnd, SB_CTL );
1351
1352     case SBM_SETRANGE16:
1353         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1354                           wParam  /* FIXME: Is this correct? */ );
1355         return 0;
1356
1357     case SBM_SETRANGE:
1358         {
1359             INT oldPos = GetScrollPos( hwnd, SB_CTL );
1360             SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1361             if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1362         }
1363         return 0;
1364
1365     case SBM_GETRANGE16:
1366         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1367         return 0;
1368
1369     case SBM_GETRANGE:
1370         GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1371         return 0;
1372
1373     case SBM_ENABLE_ARROWS16:
1374     case SBM_ENABLE_ARROWS:
1375         return EnableScrollBar( hwnd, SB_CTL, wParam );
1376
1377     case SBM_SETRANGEREDRAW:
1378         {
1379             INT oldPos = GetScrollPos( hwnd, SB_CTL );
1380             SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1381             if (oldPos != GetScrollPos( hwnd, SB_CTL )) return oldPos;
1382         }
1383         return 0;
1384
1385     case SBM_SETSCROLLINFO:
1386         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1387
1388     case SBM_GETSCROLLINFO:
1389         return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1390
1391     case 0x00e5:
1392     case 0x00e7:
1393     case 0x00e8:
1394     case 0x00eb:
1395     case 0x00ec:
1396     case 0x00ed:
1397     case 0x00ee:
1398     case 0x00ef:
1399         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1400                     message, wParam, lParam );
1401         break;
1402
1403     default:
1404         if (message >= WM_USER)
1405             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1406                          message, wParam, lParam );
1407         return DefWindowProcW( hwnd, message, wParam, lParam );
1408     }
1409     return 0;
1410 }
1411
1412
1413 /*************************************************************************
1414  *           SetScrollInfo   (USER32.@)
1415  * SetScrollInfo can be used to set the position, upper bound,
1416  * lower bound, and page size of a scrollbar control.
1417  *
1418  * RETURNS
1419  *    Scrollbar position
1420  *
1421  * NOTE
1422  *    For 100 lines of text to be displayed in a window of 25 lines,
1423  *  one would for instance use info->nMin=0, info->nMax=75
1424  *  (corresponding to the 76 different positions of the window on
1425  *  the text), and info->nPage=25.
1426  */
1427 INT WINAPI SetScrollInfo(
1428 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1429 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1430 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1431 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1432 {
1433     INT action;
1434     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1435
1436     if( action & SA_SSI_HIDE )
1437         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1438     else
1439     {
1440         if( action & SA_SSI_SHOW )
1441             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1442                 return retVal; /* SetWindowPos() already did the painting */
1443
1444         if( bRedraw && (action & SA_SSI_REFRESH))
1445             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1446         else if( action & SA_SSI_REPAINT_ARROWS )
1447             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1448     }
1449     return retVal;
1450 }
1451
1452 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1453                             const SCROLLINFO *info, INT *action  )
1454 {
1455     /* Update the scrollbar state and set action flags according to
1456      * what has to be done graphics wise. */
1457
1458     SCROLLBAR_INFO *infoPtr;
1459     UINT new_flags;
1460     BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1461
1462    *action = 0;
1463
1464     if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1465     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1466     if ((info->cbSize != sizeof(*info)) &&
1467         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1468
1469     if (TRACE_ON(scroll))
1470     {
1471         TRACE("hwnd=%p bar=%d", hwnd, nBar);
1472         if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1473         if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1474         if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1475         DPRINTF("\n");
1476     }
1477
1478     /* Set the page size */
1479
1480     if (info->fMask & SIF_PAGE)
1481     {
1482         if( infoPtr->page != info->nPage )
1483         {
1484             infoPtr->page = info->nPage;
1485            *action |= SA_SSI_REFRESH;
1486            bChangeParams = TRUE;
1487         }
1488     }
1489
1490     /* Set the scroll pos */
1491
1492     if (info->fMask & SIF_POS)
1493     {
1494         if( infoPtr->curVal != info->nPos )
1495         {
1496             infoPtr->curVal = info->nPos;
1497            *action |= SA_SSI_REFRESH;
1498         }
1499     }
1500
1501     /* Set the scroll range */
1502
1503     if (info->fMask & SIF_RANGE)
1504     {
1505         /* Invalid range -> range is set to (0,0) */
1506         if ((info->nMin > info->nMax) ||
1507             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1508         {
1509             infoPtr->minVal = 0;
1510             infoPtr->maxVal = 0;
1511             bChangeParams = TRUE;
1512         }
1513         else
1514         {
1515             if( infoPtr->minVal != info->nMin ||
1516                 infoPtr->maxVal != info->nMax )
1517             {
1518                 *action |= SA_SSI_REFRESH;
1519                 infoPtr->minVal = info->nMin;
1520                 infoPtr->maxVal = info->nMax;
1521                 bChangeParams = TRUE;
1522             }
1523         }
1524     }
1525
1526     /* Make sure the page size is valid */
1527
1528     if (infoPtr->page < 0) infoPtr->page = 0;
1529     else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1530         infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1531
1532     /* Make sure the pos is inside the range */
1533
1534     if (infoPtr->curVal < infoPtr->minVal)
1535         infoPtr->curVal = infoPtr->minVal;
1536     else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1537         infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1538
1539     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1540                  infoPtr->page, infoPtr->curVal,
1541                  infoPtr->minVal, infoPtr->maxVal );
1542
1543     /* don't change the scrollbar state if SetScrollInfo
1544      * is just called with SIF_DISABLENOSCROLL
1545      */
1546     if(!(info->fMask & SIF_ALL)) goto done;
1547
1548     /* Check if the scrollbar should be hidden or disabled */
1549
1550     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1551     {
1552         new_flags = infoPtr->flags;
1553         if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1554         {
1555             /* Hide or disable scroll-bar */
1556             if (info->fMask & SIF_DISABLENOSCROLL)
1557             {
1558                 new_flags = ESB_DISABLE_BOTH;
1559                *action |= SA_SSI_REFRESH;
1560             }
1561             else if ((nBar != SB_CTL) && bChangeParams)
1562             {
1563                 *action = SA_SSI_HIDE;
1564                 goto done;
1565             }
1566         }
1567         else  /* Show and enable scroll-bar */
1568         {
1569             new_flags = 0;
1570             if ((nBar != SB_CTL) && bChangeParams)
1571                 *action |= SA_SSI_SHOW;
1572         }
1573
1574         if (infoPtr->flags != new_flags) /* check arrow flags */
1575         {
1576             infoPtr->flags = new_flags;
1577            *action |= SA_SSI_REPAINT_ARROWS;
1578         }
1579     }
1580
1581 done:
1582     /* Return current position */
1583
1584     return infoPtr->curVal;
1585 }
1586
1587
1588 /*************************************************************************
1589  *           GetScrollInfo   (USER32.@)
1590  * GetScrollInfo can be used to retrieve the position, upper bound,
1591  * lower bound, and page size of a scrollbar control.
1592  *
1593  * RETURNS STD
1594  */
1595 BOOL WINAPI GetScrollInfo(
1596   HWND hwnd /* [in] Handle of window */ ,
1597   INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1598   LPSCROLLINFO info /* [in/out] (info.fMask [in] specifies which values are to retrieve) */)
1599 {
1600     SCROLLBAR_INFO *infoPtr;
1601
1602     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1603     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1604     if ((info->cbSize != sizeof(*info)) &&
1605         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1606
1607     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1608     if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1609     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1610         info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1611     if (info->fMask & SIF_RANGE)
1612     {
1613         info->nMin = infoPtr->minVal;
1614         info->nMax = infoPtr->maxVal;
1615     }
1616     return (info->fMask & SIF_ALL) != 0;
1617 }
1618
1619
1620 /*************************************************************************
1621  *           SetScrollPos   (USER32.@)
1622  *
1623  * RETURNS
1624  *    Success: Scrollbar position
1625  *    Failure: 0
1626  *
1627  * REMARKS
1628  *    Note the ambiguity when 0 is returned.  Use GetLastError
1629  *    to make sure there was an error (and to know which one).
1630  */
1631 INT WINAPI SetScrollPos(
1632 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1633 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1634 INT nPos /* [in] New value */,
1635 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1636 {
1637     SCROLLINFO info;
1638     SCROLLBAR_INFO *infoPtr;
1639     INT oldPos;
1640
1641     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1642     oldPos      = infoPtr->curVal;
1643     info.cbSize = sizeof(info);
1644     info.nPos   = nPos;
1645     info.fMask  = SIF_POS;
1646     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1647     return oldPos;
1648 }
1649
1650
1651 /*************************************************************************
1652  *           GetScrollPos   (USER32.@)
1653  *
1654  * RETURNS
1655  *    Success: Current position
1656  *    Failure: 0
1657  *
1658  * REMARKS
1659  *    Note the ambiguity when 0 is returned.  Use GetLastError
1660  *    to make sure there was an error (and to know which one).
1661  */
1662 INT WINAPI GetScrollPos(
1663 HWND hwnd, /* [in] Handle of window */
1664 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1665 {
1666     SCROLLBAR_INFO *infoPtr;
1667
1668     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1669     return infoPtr->curVal;
1670 }
1671
1672
1673 /*************************************************************************
1674  *           SetScrollRange   (USER32.@)
1675  *
1676  * RETURNS STD
1677  */
1678 BOOL WINAPI SetScrollRange(
1679 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1680 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1681 INT minVal, /* [in] New minimum value */
1682 INT maxVal, /* [in] New maximum value */
1683 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1684 {
1685     SCROLLINFO info;
1686
1687     info.cbSize = sizeof(info);
1688     info.nMin   = minVal;
1689     info.nMax   = maxVal;
1690     info.fMask  = SIF_RANGE;
1691     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1692     return TRUE;
1693 }
1694
1695
1696 /*************************************************************************
1697  *           SCROLL_SetNCSbState
1698  *
1699  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1700  */
1701 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1702                         int hMin, int hMax, int hPos)
1703 {
1704     INT vA, hA;
1705     SCROLLINFO vInfo, hInfo;
1706
1707     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1708     vInfo.nMin   = vMin;
1709     vInfo.nMax   = vMax;
1710     vInfo.nPos   = vPos;
1711     hInfo.nMin   = hMin;
1712     hInfo.nMax   = hMax;
1713     hInfo.nPos   = hPos;
1714     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1715
1716     SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1717     SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1718
1719     if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1720                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1721     {
1722         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1723         if( vA & SA_SSI_REFRESH )
1724             SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1725
1726         if( hA & SA_SSI_REFRESH )
1727             SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1728     }
1729     return 0;
1730 }
1731
1732
1733 /*************************************************************************
1734  *           GetScrollRange   (USER32.@)
1735  *
1736  * RETURNS STD
1737  */
1738 BOOL WINAPI GetScrollRange(
1739 HWND hwnd, /* [in] Handle of window */
1740 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL  */
1741 LPINT lpMin, /* [out] Where to store minimum value */
1742 LPINT lpMax /* [out] Where to store maximum value */)
1743 {
1744     SCROLLBAR_INFO *infoPtr;
1745
1746     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1747     {
1748         if (lpMin) lpMin = 0;
1749         if (lpMax) lpMax = 0;
1750         return FALSE;
1751     }
1752     if (lpMin) *lpMin = infoPtr->minVal;
1753     if (lpMax) *lpMax = infoPtr->maxVal;
1754     return TRUE;
1755 }
1756
1757
1758 /*************************************************************************
1759  *           SCROLL_ShowScrollBar()
1760  *
1761  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1762  */
1763 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1764                              BOOL fShowH, BOOL fShowV )
1765 {
1766     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1767
1768     TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1769
1770     switch(nBar)
1771     {
1772     case SB_CTL:
1773         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1774         return TRUE;
1775
1776     case SB_BOTH:
1777     case SB_HORZ:
1778         if (fShowH)
1779         {
1780             fShowH = !(style & WS_HSCROLL);
1781             style |= WS_HSCROLL;
1782         }
1783         else  /* hide it */
1784         {
1785             fShowH = (style & WS_HSCROLL);
1786             style &= ~WS_HSCROLL;
1787         }
1788         if( nBar == SB_HORZ ) {
1789             fShowV = FALSE;
1790             break;
1791         }
1792         /* fall through */
1793
1794     case SB_VERT:
1795         if (fShowV)
1796         {
1797             fShowV = !(style & WS_VSCROLL);
1798             style |= WS_VSCROLL;
1799         }
1800         else  /* hide it */
1801         {
1802             fShowV = (style & WS_VSCROLL);
1803             style &= ~WS_VSCROLL;
1804         }
1805         if ( nBar == SB_VERT )
1806            fShowH = FALSE;
1807         break;
1808
1809     default:
1810         return FALSE;  /* Nothing to do! */
1811     }
1812
1813     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1814     {
1815         WIN_SetStyle( hwnd, style );
1816         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1817                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1818         return TRUE;
1819     }
1820     return FALSE; /* no frame changes */
1821 }
1822
1823
1824 /*************************************************************************
1825  *           ShowScrollBar   (USER32.@)
1826  *
1827  * RETURNS STD
1828  */
1829 BOOL WINAPI ShowScrollBar(
1830 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected   */
1831 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1832 BOOL fShow /* [in] TRUE = show, FALSE = hide  */)
1833 {
1834     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1835                                       (nBar == SB_HORZ) ? 0 : fShow );
1836     return TRUE;
1837 }
1838
1839
1840 /*************************************************************************
1841  *           EnableScrollBar   (USER32.@)
1842  */
1843 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1844 {
1845     BOOL bFineWithMe;
1846     SCROLLBAR_INFO *infoPtr;
1847
1848     TRACE("%p %d %d\n", hwnd, nBar, flags );
1849
1850     flags &= ESB_DISABLE_BOTH;
1851
1852     if (nBar == SB_BOTH)
1853     {
1854         if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1855         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1856         {
1857             infoPtr->flags = flags;
1858             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1859         }
1860         nBar = SB_HORZ;
1861     }
1862     else
1863         bFineWithMe = TRUE;
1864
1865     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1866     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1867     infoPtr->flags = flags;
1868
1869     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1870     return TRUE;
1871 }