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, *LPSCROLLBAR_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  *           SCROLL_ScrollInfoValid
 142  *
 143  *  Determine if the supplied SCROLLINFO struct is valid.
 144  */
 145 inline static BOOL SCROLL_ScrollInfoValid(
 146 LPSCROLLINFO info /* [in] The SCROLLINFO struct to be tested */)
 147 {
 148     return !(info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)
 149         || (info->cbSize != sizeof(*info)
 150             && info->cbSize != sizeof(*info) - sizeof(info->nTrackPos)));
 151 }
 152
 153
 154 /***********************************************************************
 155  *           SCROLL_LoadBitmaps
 156  */
 157 static void SCROLL_LoadBitmaps(void)
 158 {
 159     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 160     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 161     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 162     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 163     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 164     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 165     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 166     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 167     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 168     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 169     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 170     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 171 }
 172
 173
 174 /***********************************************************************
 175  *           SCROLL_GetScrollBarInfo
 176  */
 177 static SCROLLBAR_INFO *SCROLL_GetScrollBarInfo( HWND hwnd, INT nBar )
 178 {
 179     SCROLLBAR_INFO *infoPtr;
 180     WND *wndPtr = WIN_FindWndPtr( hwnd );
 181
 182     if (!wndPtr) return NULL;
 183     switch(nBar)
 184     {
 185         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 186         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 187         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 188         default:
 189             WIN_ReleaseWndPtr( wndPtr );
 190             return NULL;
 191     }
 192
 193     if (!infoPtr)  /* Create the info structure if needed */
 194     {
 195         if ((infoPtr = HeapAlloc( GetProcessHeap(), 0, sizeof(SCROLLBAR_INFO) )))
 196         {
 197             infoPtr->minVal = infoPtr->curVal = infoPtr->page = 0;
 198             infoPtr->maxVal = 100;
 199             infoPtr->flags  = ESB_ENABLE_BOTH;
 200             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 201             else wndPtr->pVScroll = infoPtr;
 202         }
 203         if (!hUpArrow) SCROLL_LoadBitmaps();
 204     }
 205     WIN_ReleaseWndPtr( wndPtr );
 206     return infoPtr;
 207 }
 208
 209
 210 /***********************************************************************
 211  *           SCROLL_GetScrollBarRect
 212  *
 213  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 214  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 215  * 'arrowSize' returns the width or height of an arrow (depending on
 216  * the orientation of the scrollbar), 'thumbSize' returns the size of
 217  * the thumb, and 'thumbPos' returns the position of the thumb
 218  * relative to the left or to the top.
 219  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 220  */
 221 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 222                                        INT *arrowSize, INT *thumbSize,
 223                                        INT *thumbPos )
 224 {
 225     INT pixels;
 226     BOOL vertical;
 227     WND *wndPtr = WIN_FindWndPtr( hwnd );
 228
 229     switch(nBar)
 230     {
 231       case SB_HORZ:
 232         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 233         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 234         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 235         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 236         if(wndPtr->dwStyle & WS_BORDER) {
 237           lprect->left--;
 238           lprect->right++;
 239         } else if(wndPtr->dwStyle & WS_VSCROLL)
 240           lprect->right++;
 241         vertical = FALSE;
 242         break;
 243
 244       case SB_VERT:
 245         if((wndPtr->dwExStyle & WS_EX_LEFTSCROLLBAR) != 0)
 246             lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left - GetSystemMetrics(SM_CXVSCROLL);
 247         else
 248             lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 249         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 250         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 251         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 252         if(wndPtr->dwStyle & WS_BORDER) {
 253           lprect->top--;
 254           lprect->bottom++;
 255         } else if(wndPtr->dwStyle & WS_HSCROLL)
 256           lprect->bottom++;
 257         vertical = TRUE;
 258         break;
 259
 260       case SB_CTL:
 261         GetClientRect( hwnd, lprect );
 262         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 263         break;
 264
 265     default:
 266         WIN_ReleaseWndPtr(wndPtr);
 267         return FALSE;
 268     }
 269
 270     if (vertical) pixels = lprect->bottom - lprect->top;
 271     else pixels = lprect->right - lprect->left;
 272
 273     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 274     {
 275         if (pixels > SCROLL_MIN_RECT)
 276             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 277         else
 278             *arrowSize = 0;
 279         *thumbPos = *thumbSize = 0;
 280     }
 281     else
 282     {
 283         SCROLLBAR_INFO *info = SCROLL_GetScrollBarInfo( hwnd, nBar );
 284
 285         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 286         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 287
 288         if (info->page)
 289         {
 290             *thumbSize = MulDiv(pixels,info->page,(info->maxVal-info->minVal+1));
 291             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 292         }
 293         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 294
 295         if (((pixels -= *thumbSize ) < 0) ||
 296             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 297         {
 298             /* Rectangle too small or scrollbar disabled -> no thumb */
 299             *thumbPos = *thumbSize = 0;
 300         }
 301         else
 302         {
 303             INT max = info->maxVal - max( info->page-1, 0 );
 304             if (info->minVal >= max)
 305                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 306             else
 307                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 308                   + MulDiv(pixels, (info->curVal-info->minVal),(max - info->minVal));
 309         }
 310     }
 311     WIN_ReleaseWndPtr(wndPtr);
 312     return vertical;
 313 }
 314
 315
 316 /***********************************************************************
 317  *           SCROLL_GetThumbVal
 318  *
 319  * Compute the current scroll position based on the thumb position in pixels
 320  * from the top of the scroll-bar.
 321  */
 322 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 323                                   BOOL vertical, INT pos )
 324 {
 325     INT thumbSize;
 326     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 327
 328     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 329         return infoPtr->minVal;
 330
 331     if (infoPtr->page)
 332     {
 333         thumbSize = MulDiv(pixels,infoPtr->page,(infoPtr->maxVal-infoPtr->minVal+1));
 334         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 335     }
 336     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 337
 338     if ((pixels -= thumbSize) <= 0) return infoPtr->minVal;
 339
 340     pos = max( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 341     if (pos > pixels) pos = pixels;
 342
 343     if (!infoPtr->page) pos *= infoPtr->maxVal - infoPtr->minVal;
 344     else pos *= infoPtr->maxVal - infoPtr->minVal - infoPtr->page + 1;
 345     return infoPtr->minVal + ((pos + pixels / 2) / pixels);
 346 }
 347
 348 /***********************************************************************
 349  *           SCROLL_PtInRectEx
 350  */
 351 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 352 {
 353     RECT rect = *lpRect;
 354
 355     if (vertical)
 356     {
 357         rect.left -= lpRect->right - lpRect->left;
 358         rect.right += lpRect->right - lpRect->left;
 359     }
 360     else
 361     {
 362         rect.top -= lpRect->bottom - lpRect->top;
 363         rect.bottom += lpRect->bottom - lpRect->top;
 364     }
 365     return PtInRect( &rect, pt );
 366 }
 367
 368 /***********************************************************************
 369  *           SCROLL_ClipPos
 370  */
 371 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 372 {
 373     if( pt.x < lpRect->left )
 374         pt.x = lpRect->left;
 375     else
 376     if( pt.x > lpRect->right )
 377         pt.x = lpRect->right;
 378
 379     if( pt.y < lpRect->top )
 380         pt.y = lpRect->top;
 381     else
 382     if( pt.y > lpRect->bottom )
 383         pt.y = lpRect->bottom;
 384
 385     return pt;
 386 }
 387
 388
 389 /***********************************************************************
 390  *           SCROLL_HitTest
 391  *
 392  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 393  */
 394 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 395                                            POINT pt, BOOL bDragging )
 396 {
 397     INT arrowSize, thumbSize, thumbPos;
 398     RECT rect;
 399
 400     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 401                                            &arrowSize, &thumbSize, &thumbPos );
 402
 403     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 404          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 405
 406     if (vertical)
 407     {
 408         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 409         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 410         if (!thumbPos) return SCROLL_TOP_RECT;
 411         pt.y -= rect.top;
 412         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 413         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 414     }
 415     else  /* horizontal */
 416     {
 417         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 418         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 419         if (!thumbPos) return SCROLL_TOP_RECT;
 420         pt.x -= rect.left;
 421         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 422         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 423     }
 424     return SCROLL_THUMB;
 425 }
 426
 427
 428 /***********************************************************************
 429  *           SCROLL_DrawArrows
 430  *
 431  * Draw the scroll bar arrows.
 432  */
 433 static void SCROLL_DrawArrows_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
 434                                   RECT *rect, INT arrowSize, BOOL vertical,
 435                                   BOOL top_pressed, BOOL bottom_pressed )
 436 {
 437   RECT r;
 438
 439   r = *rect;
 440   if( vertical )
 441     r.bottom = r.top + arrowSize;
 442   else
 443     r.right = r.left + arrowSize;
 444
 445   DrawFrameControl( hdc, &r, DFC_SCROLL,
 446                     (vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
 447                     | (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 448                     | (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
 449
 450   r = *rect;
 451   if( vertical )
 452     r.top = r.bottom-arrowSize;
 453   else
 454     r.left = r.right-arrowSize;
 455
 456   DrawFrameControl( hdc, &r, DFC_SCROLL,
 457                     (vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
 458                     | (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
 459                     | (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
 460 }
 461
 462 static void SCROLL_DrawArrows_31( HDC hdc, SCROLLBAR_INFO *infoPtr,
 463                                   RECT *rect, INT arrowSize, BOOL vertical,
 464                                   BOOL top_pressed, BOOL bottom_pressed )
 465 {
 466     HDC hdcMem = CreateCompatibleDC( hdc );
 467     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 468                                     TOP_ARROW(infoPtr->flags, top_pressed)
 469                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 470
 471     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 472     StretchBlt( hdc, rect->left, rect->top,
 473                   vertical ? rect->right-rect->left : arrowSize,
 474                   vertical ? arrowSize : rect->bottom-rect->top,
 475                   hdcMem, 0, 0,
 476                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 477                   SRCCOPY );
 478
 479     SelectObject( hdcMem, vertical ?
 480                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 481                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 482     if (vertical)
 483         StretchBlt( hdc, rect->left, rect->bottom - arrowSize,
 484                       rect->right - rect->left, arrowSize,
 485                       hdcMem, 0, 0,
 486                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 487                       SRCCOPY );
 488     else
 489         StretchBlt( hdc, rect->right - arrowSize, rect->top,
 490                       arrowSize, rect->bottom - rect->top,
 491                       hdcMem, 0, 0,
 492                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 493                       SRCCOPY );
 494     SelectObject( hdcMem, hbmpPrev );
 495     DeleteDC( hdcMem );
 496 }
 497
 498 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 499                                RECT *rect, INT arrowSize, BOOL vertical,
 500                                BOOL top_pressed, BOOL bottom_pressed )
 501 {
 502   if( TWEAK_WineLook == WIN31_LOOK )
 503     SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
 504                           vertical, top_pressed,bottom_pressed );
 505   else
 506     SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
 507                           vertical, top_pressed,bottom_pressed );
 508 }
 509
 510
 511 /***********************************************************************
 512  *           SCROLL_DrawMovingThumb
 513  *
 514  * Draw the moving thumb rectangle.
 515  */
 516 static void SCROLL_DrawMovingThumb_31( HDC hdc, RECT *rect, BOOL vertical,
 517                                        INT arrowSize, INT thumbSize )
 518 {
 519     RECT r = *rect;
 520     if (vertical)
 521     {
 522         r.top += SCROLL_TrackingPos;
 523         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 524             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 525         if (r.top + thumbSize >
 526                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 527             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 528                                                                   - thumbSize;
 529         r.bottom = r.top + thumbSize;
 530     }
 531     else
 532     {
 533         r.left += SCROLL_TrackingPos;
 534         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 535             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 536         if (r.left + thumbSize >
 537                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 538             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 539                                                                   - thumbSize;
 540         r.right = r.left + thumbSize;
 541     }
 542
 543     DrawFocusRect( hdc, &r );
 544     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 545 }
 546
 547 static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
 548                                        INT arrowSize, INT thumbSize )
 549 {
 550   INT pos = SCROLL_TrackingPos;
 551   INT max_size;
 552
 553   if( vertical )
 554     max_size = rect->bottom - rect->top;
 555   else
 556     max_size = rect->right - rect->left;
 557
 558   max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
 559
 560   if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
 561     pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
 562   else if( pos > max_size )
 563     pos = max_size;
 564
 565   SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
 566                           rect, arrowSize, thumbSize, pos,
 567                           0, vertical, FALSE, FALSE );
 568
 569   SCROLL_MovingThumb = !SCROLL_MovingThumb;
 570 }
 571
 572 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 573                                     INT arrowSize, INT thumbSize )
 574 {
 575   if( TWEAK_WineLook == WIN31_LOOK )
 576     SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
 577   else
 578     SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
 579 }
 580
 581 /***********************************************************************
 582  *           SCROLL_DrawInterior
 583  *
 584  * Draw the scroll bar interior (everything except the arrows).
 585  */
 586 static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
 587                                     RECT *rect, INT arrowSize,
 588                                     INT thumbSize, INT thumbPos,
 589                                     UINT flags, BOOL vertical,
 590                                     BOOL top_selected, BOOL bottom_selected )
 591 {
 592     RECT r;
 593     HPEN hSavePen;
 594     HBRUSH hSaveBrush,hBrush;
 595
 596     /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 597      * The window-owned scrollbars need to call DEFWND_ControlColor
 598      * to correctly setup default scrollbar colors
 599      */
 600     if (nBar == SB_CTL)
 601     {
 602       hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 603                                      (WPARAM)hdc,(LPARAM)hwnd);
 604     }
 605     else
 606     {
 607       hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 608     }
 609
 610     hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
 611     hSaveBrush = SelectObject( hdc, hBrush );
 612
 613     /* Calculate the scroll rectangle */
 614     r = *rect;
 615     if (vertical)
 616     {
 617         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 618         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 619     }
 620     else
 621     {
 622         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 623         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 624     }
 625
 626     /* Draw the scroll rectangles and thumb */
 627     if (!thumbPos)  /* No thumb to draw */
 628     {
 629         PatBlt( hdc, r.left, r.top,
 630                      r.right - r.left, r.bottom - r.top,
 631                      PATCOPY );
 632
 633         /* cleanup and return */
 634         SelectObject( hdc, hSavePen );
 635         SelectObject( hdc, hSaveBrush );
 636         return;
 637     }
 638
 639     if (vertical)
 640     {
 641         PatBlt( hdc, r.left, r.top,
 642                   r.right - r.left,
 643                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 644                   top_selected ? 0x0f0000 : PATCOPY );
 645         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 646         PatBlt( hdc, r.left, r.top + thumbSize,
 647                   r.right - r.left,
 648                   r.bottom - r.top - thumbSize,
 649                   bottom_selected ? 0x0f0000 : PATCOPY );
 650         r.bottom = r.top + thumbSize;
 651     }
 652     else  /* horizontal */
 653     {
 654         PatBlt( hdc, r.left, r.top,
 655                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 656                   r.bottom - r.top,
 657                   top_selected ? 0x0f0000 : PATCOPY );
 658         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 659         PatBlt( hdc, r.left + thumbSize, r.top,
 660                   r.right - r.left - thumbSize,
 661                   r.bottom - r.top,
 662                   bottom_selected ? 0x0f0000 : PATCOPY );
 663         r.right = r.left + thumbSize;
 664     }
 665
 666     /* Draw the thumb */
 667     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE  );
 668
 669     /* cleanup */
 670     SelectObject( hdc, hSavePen );
 671     SelectObject( hdc, hSaveBrush );
 672 }
 673
 674
 675 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 676                                  RECT *rect, INT arrowSize,
 677                                  INT thumbSize, INT thumbPos,
 678                                  UINT flags, BOOL vertical,
 679                                  BOOL top_selected, BOOL bottom_selected )
 680 {
 681     RECT r;
 682     HPEN hSavePen;
 683     HBRUSH hSaveBrush,hBrush;
 684     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 685
 686     if (Save_SCROLL_MovingThumb &&
 687         (SCROLL_TrackingWin == hwnd) &&
 688         (SCROLL_TrackingBar == nBar))
 689         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 690
 691       /* Select the correct brush and pen */
 692
 693     if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 694     {
 695         /* This ought to be the color of the parent window */
 696         hBrush = GetSysColorBrush(COLOR_WINDOW);
 697     }
 698     else
 699     {
 700         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 701          * The window-owned scrollbars need to call DEFWND_ControlColor
 702          * to correctly setup default scrollbar colors
 703          */
 704         if (nBar == SB_CTL) {
 705             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 706                                            (WPARAM)hdc,(LPARAM)hwnd);
 707         } else {
 708             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 709         }
 710     }
 711     hSavePen = SelectObject( hdc, SYSCOLOR_GetPen(COLOR_WINDOWFRAME) );
 712     hSaveBrush = SelectObject( hdc, hBrush );
 713
 714       /* Calculate the scroll rectangle */
 715
 716     r = *rect;
 717     if (vertical)
 718     {
 719         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 720         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 721     }
 722     else
 723     {
 724         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 725         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 726     }
 727
 728       /* Draw the scroll bar frame */
 729
 730         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 731     if (TWEAK_WineLook == WIN31_LOOK)
 732         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 733
 734       /* Draw the scroll rectangles and thumb */
 735
 736     if (!thumbPos)  /* No thumb to draw */
 737     {
 738         INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
 739
 740         PatBlt( hdc, r.left+offset, r.top+offset,
 741                      r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
 742                      PATCOPY );
 743
 744         /* cleanup and return */
 745         SelectObject( hdc, hSavePen );
 746         SelectObject( hdc, hSaveBrush );
 747         return;
 748     }
 749
 750     if (vertical)
 751     {
 752         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 753
 754         PatBlt( hdc, r.left + offset, r.top + offset,
 755                   r.right - r.left - offset*2,
 756                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
 757                   top_selected ? 0x0f0000 : PATCOPY );
 758         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 759         PatBlt( hdc, r.left + offset, r.top + thumbSize,
 760                   r.right - r.left - offset*2,
 761                   r.bottom - r.top - thumbSize - offset,
 762                   bottom_selected ? 0x0f0000 : PATCOPY );
 763         r.bottom = r.top + thumbSize;
 764     }
 765     else  /* horizontal */
 766     {
 767         INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
 768
 769         PatBlt( hdc, r.left + offset, r.top + offset,
 770                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
 771                   r.bottom - r.top - offset*2,
 772                   top_selected ? 0x0f0000 : PATCOPY );
 773         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 774         PatBlt( hdc, r.left + thumbSize, r.top + offset,
 775                   r.right - r.left - thumbSize - offset,
 776                   r.bottom - r.top - offset*2,
 777                   bottom_selected ? 0x0f0000 : PATCOPY );
 778         r.right = r.left + thumbSize;
 779     }
 780
 781       /* Draw the thumb */
 782
 783     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 784     if (TWEAK_WineLook == WIN31_LOOK)
 785     {
 786         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 787         r.top++, r.left++;
 788     }
 789     else
 790     {
 791         Rectangle( hdc, r.left+1, r.top+1, r.right-1, r.bottom-1 );
 792     }
 793     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 794
 795     if (Save_SCROLL_MovingThumb &&
 796         (SCROLL_TrackingWin == hwnd) &&
 797         (SCROLL_TrackingBar == nBar))
 798         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 799
 800     /* cleanup */
 801     SelectObject( hdc, hSavePen );
 802     SelectObject( hdc, hSaveBrush );
 803 }
 804
 805
 806 /***********************************************************************
 807  *           SCROLL_DrawScrollBar
 808  *
 809  * Redraw the whole scrollbar.
 810  */
 811 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 812                            BOOL arrows, BOOL interior )
 813 {
 814     INT arrowSize, thumbSize, thumbPos;
 815     RECT rect;
 816     BOOL vertical;
 817     WND *wndPtr = WIN_FindWndPtr( hwnd );
 818     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
 819     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 820
 821     if (!wndPtr || !infoPtr ||
 822         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 823         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 824     if (!WIN_IsWindowDrawable( hwnd, FALSE )) goto END;
 825     hwnd = wndPtr->hwndSelf;  /* make it a full handle */
 826
 827     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 828                                         &arrowSize, &thumbSize, &thumbPos );
 829
 830     /* do not draw if the scrollbar rectangle is empty */
 831     if(IsRectEmpty(&rect))
 832       goto END;
 833
 834     if (Save_SCROLL_MovingThumb &&
 835         (SCROLL_TrackingWin == hwnd) &&
 836         (SCROLL_TrackingBar == nBar))
 837         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 838
 839       /* Draw the arrows */
 840
 841     if (arrows && arrowSize)
 842     {
 843         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 844             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 845                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 846                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 847         else
 848             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 849                                                                FALSE, FALSE );
 850     }
 851     if( interior )
 852         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 853                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 854
 855     if (Save_SCROLL_MovingThumb &&
 856         (SCROLL_TrackingWin == hwnd) &&
 857         (SCROLL_TrackingBar == nBar))
 858         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 859
 860     /* if scroll bar has focus, reposition the caret */
 861     if(hwnd==GetFocus() && (nBar==SB_CTL))
 862     {
 863         if (!vertical)
 864         {
 865             SetCaretPos(thumbPos+1, rect.top+1);
 866         }
 867         else
 868         {
 869             SetCaretPos(rect.top+1, thumbPos+1);
 870         }
 871     }
 872
 873 END:
 874     WIN_ReleaseWndPtr(wndPtr);
 875 }
 876
 877
 878 /***********************************************************************
 879  *           SCROLL_RefreshScrollBar
 880  *
 881  * Repaint the scroll bar interior after a SetScrollRange() or
 882  * SetScrollPos() call.
 883  */
 884 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 885                                      BOOL arrows, BOOL interior )
 886 {
 887     HDC hdc = GetDCEx( hwnd, 0,
 888                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 889     if (!hdc) return;
 890
 891     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 892     ReleaseDC( hwnd, hdc );
 893 }
 894
 895
 896 /***********************************************************************
 897  *           SCROLL_HandleKbdEvent
 898  *
 899  * Handle a keyboard event (only for SB_CTL scrollbars with focus).
 900  */
 901 static void SCROLL_HandleKbdEvent(
 902 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
 903 WPARAM wParam /* [in] Variable input including enable state */,
 904 LPARAM lParam /* [in] Variable input including input point */)
 905 {
 906     TRACE("hwnd=%p wParam=%d lParam=%ld\n", hwnd, wParam, lParam);
 907
 908     /* hide caret on first KEYDOWN to prevent flicker */
 909     if ((lParam & PFD_DOUBLEBUFFER_DONTCARE) == 0)
 910         HideCaret(hwnd);
 911
 912     switch(wParam)
 913     {
 914     case VK_PRIOR: wParam = SB_PAGEUP; break;
 915     case VK_NEXT:  wParam = SB_PAGEDOWN; break;
 916     case VK_HOME:  wParam = SB_TOP; break;
 917     case VK_END:   wParam = SB_BOTTOM; break;
 918     case VK_UP:    wParam = SB_LINEUP; break;
 919     case VK_DOWN:  wParam = SB_LINEDOWN; break;
 920     default: return;
 921     }
 922     SendMessageW(GetParent(hwnd),
 923         ((GetWindowLongA( hwnd, GWL_STYLE ) & SBS_VERT) ?
 924             WM_VSCROLL : WM_HSCROLL), wParam, (LPARAM)hwnd);
 925 }
 926
 927
 928 /***********************************************************************
 929  *           SCROLL_HandleScrollEvent
 930  *
 931  * Handle a mouse or timer event for the scrollbar.
 932  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 933  * windows coordinates.
 934  */
 935 static void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 936 {
 937       /* Previous mouse position for timer events */
 938     static POINT prevPt;
 939       /* Thumb position when tracking started. */
 940     static UINT trackThumbPos;
 941       /* Position in the scroll-bar of the last button-down event. */
 942     static INT lastClickPos;
 943       /* Position in the scroll-bar of the last mouse event. */
 944     static INT lastMousePos;
 945
 946     enum SCROLL_HITTEST hittest;
 947     HWND hwndOwner, hwndCtl;
 948     BOOL vertical;
 949     INT arrowSize, thumbSize, thumbPos;
 950     RECT rect;
 951     HDC hdc;
 952
 953     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar );
 954     if (!infoPtr) return;
 955     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 956                   return;
 957
 958     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 959     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 960                                         &arrowSize, &thumbSize, &thumbPos );
 961     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 962     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 963
 964     switch(msg)
 965     {
 966       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 967           HideCaret(hwnd);  /* hide caret while holding down LBUTTON */
 968           SCROLL_trackVertical = vertical;
 969           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 970           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 971           lastMousePos  = lastClickPos;
 972           trackThumbPos = thumbPos;
 973           prevPt = pt;
 974           if (nBar == SB_CTL && (GetWindowLongA(hwnd, GWL_STYLE) & WS_TABSTOP)) SetFocus( hwnd );
 975           SetCapture( hwnd );
 976           break;
 977
 978       case WM_MOUSEMOVE:
 979           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 980           prevPt = pt;
 981           break;
 982
 983       case WM_LBUTTONUP:
 984           hittest = SCROLL_NOWHERE;
 985           ReleaseCapture();
 986           /* if scrollbar has focus, show back caret */
 987           if (hwnd==GetFocus()) ShowCaret(hwnd);
 988           break;
 989
 990       case WM_SYSTIMER:
 991           pt = prevPt;
 992           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 993           break;
 994
 995       default:
 996           return;  /* Should never happen */
 997     }
 998
 999     TRACE("Event: hwnd=%p bar=%d msg=%s pt=%ld,%ld hit=%d\n",
1000           hwnd, nBar, SPY_GetMsgName(msg,hwnd), pt.x, pt.y, hittest );
1001
1002     switch(SCROLL_trackHitTest)
1003     {
1004     case SCROLL_NOWHERE:  /* No tracking in progress */
1005         break;
1006
1007     case SCROLL_TOP_ARROW:
1008         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1009                            (hittest == SCROLL_trackHitTest), FALSE );
1010         if (hittest == SCROLL_trackHitTest)
1011         {
1012             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1013             {
1014                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1015                                 SB_LINEUP, (LPARAM)hwndCtl );
1016             }
1017
1018             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1019                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1020                             (TIMERPROC)0 );
1021         }
1022         else KillSystemTimer( hwnd, SCROLL_TIMER );
1023         break;
1024
1025     case SCROLL_TOP_RECT:
1026         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1027                              thumbPos, infoPtr->flags, vertical,
1028                              (hittest == SCROLL_trackHitTest), FALSE );
1029         if (hittest == SCROLL_trackHitTest)
1030         {
1031             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1032             {
1033                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1034                                 SB_PAGEUP, (LPARAM)hwndCtl );
1035             }
1036             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1037                               SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1038                               (TIMERPROC)0 );
1039         }
1040         else KillSystemTimer( hwnd, SCROLL_TIMER );
1041         break;
1042
1043     case SCROLL_THUMB:
1044         if (msg == WM_LBUTTONDOWN)
1045         {
1046             SCROLL_TrackingWin = hwnd;
1047             SCROLL_TrackingBar = nBar;
1048             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
1049             SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1050                                                         vertical,
1051                                                         SCROLL_TrackingPos );
1052             if (!SCROLL_MovingThumb)
1053                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1054         }
1055         else if (msg == WM_LBUTTONUP)
1056         {
1057             if (SCROLL_MovingThumb)
1058                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
1059             SCROLL_TrackingWin = 0;
1060             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1061                                  thumbPos, infoPtr->flags, vertical,
1062                                  FALSE, FALSE );
1063         }
1064         else  /* WM_MOUSEMOVE */
1065         {
1066             UINT pos;
1067
1068             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
1069             else
1070             {
1071                 pt = SCROLL_ClipPos( &rect, pt );
1072                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
1073             }
1074             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
1075             {
1076                 if (SCROLL_MovingThumb)
1077                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1078                                         arrowSize, thumbSize );
1079                 lastMousePos = pos;
1080                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
1081                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
1082                                                          vertical,
1083                                                          SCROLL_TrackingPos );
1084                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1085                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
1086                                 (LPARAM)hwndCtl );
1087                 if (!SCROLL_MovingThumb)
1088                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
1089                                         arrowSize, thumbSize );
1090             }
1091         }
1092         break;
1093
1094     case SCROLL_BOTTOM_RECT:
1095         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
1096                              thumbPos, infoPtr->flags, vertical,
1097                              FALSE, (hittest == SCROLL_trackHitTest) );
1098         if (hittest == SCROLL_trackHitTest)
1099         {
1100             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1101             {
1102                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1103                                 SB_PAGEDOWN, (LPARAM)hwndCtl );
1104             }
1105             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1106                               SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1107                               (TIMERPROC)0 );
1108         }
1109         else KillSystemTimer( hwnd, SCROLL_TIMER );
1110         break;
1111
1112     case SCROLL_BOTTOM_ARROW:
1113         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
1114                            FALSE, (hittest == SCROLL_trackHitTest) );
1115         if (hittest == SCROLL_trackHitTest)
1116         {
1117             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
1118             {
1119                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1120                                 SB_LINEDOWN, (LPARAM)hwndCtl );
1121             }
1122
1123             SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
1124                             SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
1125                             (TIMERPROC)0 );
1126         }
1127         else KillSystemTimer( hwnd, SCROLL_TIMER );
1128         break;
1129     }
1130
1131     if (msg == WM_LBUTTONDOWN)
1132     {
1133
1134         if (hittest == SCROLL_THUMB)
1135         {
1136             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1137                                  trackThumbPos + lastMousePos - lastClickPos );
1138             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1139                             MAKEWPARAM( SB_THUMBTRACK, val ), (LPARAM)hwndCtl );
1140         }
1141     }
1142
1143     if (msg == WM_LBUTTONUP)
1144     {
1145         hittest = SCROLL_trackHitTest;
1146         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
1147
1148         if (hittest == SCROLL_THUMB)
1149         {
1150             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
1151                                  trackThumbPos + lastMousePos - lastClickPos );
1152             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1153                             MAKEWPARAM( SB_THUMBPOSITION, val ), (LPARAM)hwndCtl );
1154         }
1155         SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
1156                           SB_ENDSCROLL, (LPARAM)hwndCtl );
1157     }
1158
1159     ReleaseDC( hwnd, hdc );
1160 }
1161
1162
1163 /***********************************************************************
1164  *           SCROLL_TrackScrollBar
1165  *
1166  * Track a mouse button press on a scroll-bar.
1167  * pt is in screen-coordinates for non-client scroll bars.
1168  */
1169 void SCROLL_TrackScrollBar( HWND hwnd, INT scrollbar, POINT pt )
1170 {
1171     MSG msg;
1172     INT xoffset = 0, yoffset = 0;
1173
1174     if (scrollbar != SB_CTL)
1175     {
1176         WND *wndPtr = WIN_GetPtr( hwnd );
1177         if (!wndPtr || wndPtr == WND_OTHER_PROCESS) return;
1178         xoffset = wndPtr->rectClient.left - wndPtr->rectWindow.left;
1179         yoffset = wndPtr->rectClient.top - wndPtr->rectWindow.top;
1180         WIN_ReleasePtr( wndPtr );
1181         ScreenToClient( hwnd, &pt );
1182         pt.x += xoffset;
1183         pt.y += yoffset;
1184     }
1185
1186     SCROLL_HandleScrollEvent( hwnd, scrollbar, WM_LBUTTONDOWN, pt );
1187
1188     do
1189     {
1190         if (!GetMessageW( &msg, 0, 0, 0 )) break;
1191         if (CallMsgFilterW( &msg, MSGF_SCROLLBAR )) continue;
1192         switch(msg.message)
1193         {
1194         case WM_LBUTTONUP:
1195         case WM_MOUSEMOVE:
1196         case WM_SYSTIMER:
1197             pt.x = LOWORD(msg.lParam) + xoffset;
1198             pt.y = HIWORD(msg.lParam) + yoffset;
1199             SCROLL_HandleScrollEvent( hwnd, scrollbar, msg.message, pt );
1200             break;
1201         default:
1202             TranslateMessage( &msg );
1203             DispatchMessageW( &msg );
1204             break;
1205         }
1206         if (!IsWindow( hwnd ))
1207         {
1208             ReleaseCapture();
1209             break;
1210         }
1211     } while (msg.message != WM_LBUTTONUP);
1212 }
1213
1214
1215 /***********************************************************************
1216  *           SCROLL_CreateScrollBar
1217  *
1218  *  Create a scroll bar
1219  */
1220 static void SCROLL_CreateScrollBar(
1221 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1222 LPCREATESTRUCTW lpCreate /* [in] The style and place of the scroll bar */)
1223 {
1224     POINT pos, size;
1225     LPSCROLLBAR_INFO info = SCROLL_GetScrollBarInfo(hwnd, SB_CTL);
1226     if (!info) return;
1227
1228     TRACE("hwnd=%p lpCreate=%p\n", hwnd, lpCreate);
1229
1230     if (lpCreate->style & WS_DISABLED)
1231     {
1232         info->flags = ESB_DISABLE_BOTH;
1233         TRACE("Created WS_DISABLED scrollbar\n");
1234     }
1235
1236     /* copy the desired positions and size */
1237     pos.x = lpCreate->x; pos.y = lpCreate->y;
1238     size.x = lpCreate->cx; size.y = lpCreate->cy;
1239
1240     /* move position based on style */
1241     if (lpCreate->style & SBS_RIGHTALIGN)
1242         pos.x += size.x - GetSystemMetrics(SM_CXVSCROLL) - 1;
1243     else if (lpCreate->style & SBS_BOTTOMALIGN)
1244         pos.y += size.y - GetSystemMetrics(SM_CYHSCROLL) - 1;
1245
1246     /* change size based on style */
1247     if (lpCreate->style & SBS_VERT)
1248         size.x = GetSystemMetrics(SM_CXVSCROLL) + 1;
1249     else
1250         size.y = GetSystemMetrics(SM_CYHSCROLL) + 1;
1251
1252     MoveWindow(hwnd, pos.x, pos.y, size.x, size.y, FALSE);
1253 }
1254
1255
1256 /*************************************************************************
1257  *           SCROLL_GetScrollInfo
1258  *
1259  *  Internal helper for the API function
1260  */
1261 static BOOL SCROLL_GetScrollInfo(
1262 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1263 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1264 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1265 {
1266     LPSCROLLBAR_INFO infoPtr;
1267
1268     /* handle invalid data structure */
1269     if (!SCROLL_ScrollInfoValid(info)
1270         || !(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar)))
1271             return FALSE;
1272
1273     /* fill in the desired scroll info structure */
1274     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->page;
1275     if (info->fMask & SIF_POS) info->nPos = infoPtr->curVal;
1276     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1277         info->nTrackPos = (SCROLL_TrackingWin == WIN_GetFullHandle(hwnd)) ? SCROLL_TrackingVal : infoPtr->curVal;
1278     if (info->fMask & SIF_RANGE)
1279     {
1280         info->nMin = infoPtr->minVal;
1281         info->nMax = infoPtr->maxVal;
1282     }
1283
1284     return (info->fMask & SIF_ALL) != 0;
1285 }
1286
1287
1288 /*************************************************************************
1289  *           SCROLL_GetScrollPos
1290  *
1291  *  Internal helper for the API function
1292  */
1293 static INT SCROLL_GetScrollPos(
1294 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1295 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1296 {
1297     LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1298     return infoPtr ? infoPtr->curVal: 0;
1299 }
1300
1301
1302 /*************************************************************************
1303  *           SCROLL_GetScrollRange
1304  *
1305  *  Internal helper for the API function
1306  *
1307  * RETURNS STD
1308  */
1309 static BOOL SCROLL_GetScrollRange(
1310 HWND hwnd, /* [in] Handle of window */
1311 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL  */
1312 LPINT lpMin, /* [out] Where to store minimum value */
1313 LPINT lpMax /* [out] Where to store maximum value */)
1314 {
1315     LPSCROLLBAR_INFO infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar);
1316
1317     if (lpMin) *lpMin = infoPtr ? infoPtr->minVal : 0;
1318     if (lpMax) *lpMax = infoPtr ? infoPtr->maxVal : 0;
1319
1320     return infoPtr ? TRUE : FALSE;
1321 }
1322
1323
1324
1325 /***********************************************************************
1326  *           ScrollBarWndProc
1327  */
1328 static LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam )
1329 {
1330     if (!IsWindow( hwnd )) return 0;
1331
1332     switch(message)
1333     {
1334     case WM_CREATE:
1335         SCROLL_CreateScrollBar(hwnd, (LPCREATESTRUCTW)lParam);
1336         if (!hUpArrow) SCROLL_LoadBitmaps();
1337         break;
1338
1339     case WM_ENABLE:
1340         {
1341             SCROLLBAR_INFO *infoPtr;
1342             if ((infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_CTL )))
1343             {
1344                 infoPtr->flags = wParam ? ESB_ENABLE_BOTH : ESB_DISABLE_BOTH;
1345                 SCROLL_RefreshScrollBar(hwnd, SB_CTL, TRUE, TRUE);
1346             }
1347         }
1348         return 0;
1349
1350     case WM_LBUTTONDOWN:
1351         {
1352             POINT pt;
1353             pt.x = SLOWORD(lParam);
1354             pt.y = SHIWORD(lParam);
1355             SCROLL_TrackScrollBar( hwnd, SB_CTL, pt );
1356         }
1357         break;
1358     case WM_LBUTTONUP:
1359     case WM_MOUSEMOVE:
1360     case WM_SYSTIMER:
1361         {
1362             POINT pt;
1363             pt.x = SLOWORD(lParam);
1364             pt.y = SHIWORD(lParam);
1365             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
1366         }
1367         break;
1368
1369     case WM_KEYDOWN:
1370         SCROLL_HandleKbdEvent(hwnd, wParam, lParam);
1371         break;
1372
1373     case WM_KEYUP:
1374         ShowCaret(hwnd);
1375         break;
1376
1377     case WM_SETFOCUS:
1378         {
1379             /* Create a caret when a ScrollBar get focus */
1380             RECT rect;
1381             int arrowSize, thumbSize, thumbPos, vertical;
1382             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,
1383                                                 &arrowSize, &thumbSize, &thumbPos );
1384             if (!vertical)
1385             {
1386                 CreateCaret(hwnd, (HBITMAP)1, thumbSize-2, rect.bottom-rect.top-2);
1387                 SetCaretPos(thumbPos+1, rect.top+1);
1388             }
1389             else
1390             {
1391                 CreateCaret(hwnd, (HBITMAP)1, rect.right-rect.left-2,thumbSize-2);
1392                 SetCaretPos(rect.top+1, thumbPos+1);
1393             }
1394             ShowCaret(hwnd);
1395         }
1396         break;
1397
1398     case WM_KILLFOCUS:
1399         {
1400             RECT rect;
1401             int arrowSize, thumbSize, thumbPos, vertical;
1402             vertical = SCROLL_GetScrollBarRect( hwnd, SB_CTL, &rect,&arrowSize, &thumbSize, &thumbPos );
1403             if (!vertical){
1404                 rect.left=thumbPos+1;
1405                 rect.right=rect.left+thumbSize;
1406             }
1407             else
1408             {
1409                 rect.top=thumbPos+1;
1410                 rect.bottom=rect.top+thumbSize;
1411             }
1412             HideCaret(hwnd);
1413             InvalidateRect(hwnd,&rect,0);
1414             DestroyCaret();
1415         }
1416         break;
1417
1418     case WM_ERASEBKGND:
1419          return 1;
1420
1421     case WM_GETDLGCODE:
1422          return DLGC_WANTARROWS; /* Windows returns this value */
1423
1424     case WM_PAINT:
1425         {
1426             PAINTSTRUCT ps;
1427             HDC hdc = BeginPaint( hwnd, &ps );
1428             if (GetWindowLongW( hwnd, GWL_STYLE ) & SBS_SIZEBOX)
1429                 FillRect( hdc, &ps.rcPaint, GetSysColorBrush(COLOR_SCROLLBAR) );
1430             else
1431                 SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
1432             EndPaint( hwnd, &ps );
1433         }
1434         break;
1435
1436     case SBM_SETPOS16:
1437     case SBM_SETPOS:
1438         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
1439
1440     case SBM_GETPOS16:
1441     case SBM_GETPOS:
1442        return SCROLL_GetScrollPos(hwnd, SB_CTL);
1443
1444     case SBM_SETRANGE16:
1445         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
1446                           wParam  /* FIXME: Is this correct? */ );
1447         return 0;
1448
1449     case SBM_SETRANGE:
1450         {
1451             INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1452             SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1453             if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1454         }
1455         return 0;
1456
1457     case SBM_GETRANGE16:
1458         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1459         return 0;
1460
1461     case SBM_GETRANGE:
1462         return SCROLL_GetScrollRange(hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam);
1463
1464     case SBM_ENABLE_ARROWS16:
1465     case SBM_ENABLE_ARROWS:
1466         return EnableScrollBar( hwnd, SB_CTL, wParam );
1467
1468     case SBM_SETRANGEREDRAW:
1469         {
1470             INT oldPos = SCROLL_GetScrollPos( hwnd, SB_CTL );
1471             SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1472             if (oldPos != SCROLL_GetScrollPos( hwnd, SB_CTL )) return oldPos;
1473         }
1474         return 0;
1475
1476     case SBM_SETSCROLLINFO:
1477         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1478
1479     case SBM_GETSCROLLINFO:
1480         return SCROLL_GetScrollInfo(hwnd, SB_CTL, (SCROLLINFO *)lParam);
1481
1482     case 0x00e5:
1483     case 0x00e7:
1484     case 0x00e8:
1485     case 0x00eb:
1486     case 0x00ec:
1487     case 0x00ed:
1488     case 0x00ee:
1489     case 0x00ef:
1490         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1491                     message, wParam, lParam );
1492         break;
1493
1494     default:
1495         if (message >= WM_USER)
1496             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1497                          message, wParam, lParam );
1498         return DefWindowProcW( hwnd, message, wParam, lParam );
1499     }
1500     return 0;
1501 }
1502
1503
1504 /*************************************************************************
1505  *           SetScrollInfo   (USER32.@)
1506  * SetScrollInfo can be used to set the position, upper bound,
1507  * lower bound, and page size of a scrollbar control.
1508  *
1509  * RETURNS
1510  *    Scrollbar position
1511  *
1512  * NOTE
1513  *    For 100 lines of text to be displayed in a window of 25 lines,
1514  *  one would for instance use info->nMin=0, info->nMax=75
1515  *  (corresponding to the 76 different positions of the window on
1516  *  the text), and info->nPage=25.
1517  */
1518 INT WINAPI SetScrollInfo(
1519 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1520 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1521 const SCROLLINFO *info /* [in] Specifies what to change and new values */,
1522 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1523 {
1524     INT action;
1525     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1526
1527     if( action & SA_SSI_HIDE )
1528         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1529     else
1530     {
1531         if( action & SA_SSI_SHOW )
1532             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1533                 return retVal; /* SetWindowPos() already did the painting */
1534
1535         if( bRedraw && (action & SA_SSI_REFRESH))
1536             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1537         else if( action & SA_SSI_REPAINT_ARROWS )
1538             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1539     }
1540     return retVal;
1541 }
1542
1543 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1544                             const SCROLLINFO *info, INT *action  )
1545 {
1546     /* Update the scrollbar state and set action flags according to
1547      * what has to be done graphics wise. */
1548
1549     SCROLLBAR_INFO *infoPtr;
1550     UINT new_flags;
1551     BOOL bChangeParams = FALSE; /* don't show/hide scrollbar if params don't change */
1552
1553    *action = 0;
1554
1555     if (!(infoPtr = SCROLL_GetScrollBarInfo(hwnd, nBar))) return 0;
1556     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1557     if ((info->cbSize != sizeof(*info)) &&
1558         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1559
1560     if (TRACE_ON(scroll))
1561     {
1562         TRACE("hwnd=%p bar=%d", hwnd, nBar);
1563         if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
1564         if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
1565         if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
1566         DPRINTF("\n");
1567     }
1568
1569     /* Set the page size */
1570
1571     if (info->fMask & SIF_PAGE)
1572     {
1573         if( infoPtr->page != info->nPage )
1574         {
1575             infoPtr->page = info->nPage;
1576            *action |= SA_SSI_REFRESH;
1577            bChangeParams = TRUE;
1578         }
1579     }
1580
1581     /* Set the scroll pos */
1582
1583     if (info->fMask & SIF_POS)
1584     {
1585         if( infoPtr->curVal != info->nPos )
1586         {
1587             infoPtr->curVal = info->nPos;
1588            *action |= SA_SSI_REFRESH;
1589         }
1590     }
1591
1592     /* Set the scroll range */
1593
1594     if (info->fMask & SIF_RANGE)
1595     {
1596         /* Invalid range -> range is set to (0,0) */
1597         if ((info->nMin > info->nMax) ||
1598             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1599         {
1600             infoPtr->minVal = 0;
1601             infoPtr->maxVal = 0;
1602             bChangeParams = TRUE;
1603         }
1604         else
1605         {
1606             if( infoPtr->minVal != info->nMin ||
1607                 infoPtr->maxVal != info->nMax )
1608             {
1609                 *action |= SA_SSI_REFRESH;
1610                 infoPtr->minVal = info->nMin;
1611                 infoPtr->maxVal = info->nMax;
1612                 bChangeParams = TRUE;
1613             }
1614         }
1615     }
1616
1617     /* Make sure the page size is valid */
1618
1619     if (infoPtr->page < 0) infoPtr->page = 0;
1620     else if (infoPtr->page > infoPtr->maxVal - infoPtr->minVal + 1 )
1621         infoPtr->page = infoPtr->maxVal - infoPtr->minVal + 1;
1622
1623     /* Make sure the pos is inside the range */
1624
1625     if (infoPtr->curVal < infoPtr->minVal)
1626         infoPtr->curVal = infoPtr->minVal;
1627     else if (infoPtr->curVal > infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1628         infoPtr->curVal = infoPtr->maxVal - max( infoPtr->page-1, 0 );
1629
1630     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1631                  infoPtr->page, infoPtr->curVal,
1632                  infoPtr->minVal, infoPtr->maxVal );
1633
1634     /* don't change the scrollbar state if SetScrollInfo
1635      * is just called with SIF_DISABLENOSCROLL
1636      */
1637     if(!(info->fMask & SIF_ALL)) goto done;
1638
1639     /* Check if the scrollbar should be hidden or disabled */
1640
1641     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1642     {
1643         new_flags = infoPtr->flags;
1644         if (infoPtr->minVal >= infoPtr->maxVal - max( infoPtr->page-1, 0 ))
1645         {
1646             /* Hide or disable scroll-bar */
1647             if (info->fMask & SIF_DISABLENOSCROLL)
1648             {
1649                 new_flags = ESB_DISABLE_BOTH;
1650                *action |= SA_SSI_REFRESH;
1651             }
1652             else if ((nBar != SB_CTL) && bChangeParams)
1653             {
1654                 *action = SA_SSI_HIDE;
1655                 goto done;
1656             }
1657         }
1658         else  /* Show and enable scroll-bar */
1659         {
1660             new_flags = 0;
1661             if ((nBar != SB_CTL) && bChangeParams)
1662                 *action |= SA_SSI_SHOW;
1663         }
1664
1665         if (infoPtr->flags != new_flags) /* check arrow flags */
1666         {
1667             infoPtr->flags = new_flags;
1668            *action |= SA_SSI_REPAINT_ARROWS;
1669         }
1670     }
1671
1672 done:
1673     /* Return current position */
1674
1675     return infoPtr->curVal;
1676 }
1677
1678
1679 /*************************************************************************
1680  *           GetScrollInfo   (USER32.@)
1681  *
1682  * GetScrollInfo can be used to retrieve the position, upper bound,
1683  * lower bound, and page size of a scrollbar control.
1684  *
1685  * RETURNS STD
1686  */
1687 BOOL WINAPI GetScrollInfo(
1688 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1689 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1690 LPSCROLLINFO info /* [in/out] (fMask specifies which values to retrieve) */)
1691 {
1692     TRACE("hwnd=%p nBar=%d info=%p\n", hwnd, nBar, info);
1693
1694     /* Refer SB_CTL requests to the window */
1695     if (nBar == SB_CTL)
1696         return SendMessageA(hwnd, SBM_GETSCROLLINFO, (WPARAM)0, (LPARAM)info);
1697     else
1698         return SCROLL_GetScrollInfo(hwnd, nBar, info);
1699 }
1700
1701
1702 /*************************************************************************
1703  *           SetScrollPos   (USER32.@)
1704  *
1705  * RETURNS
1706  *    Success: Scrollbar position
1707  *    Failure: 0
1708  *
1709  * REMARKS
1710  *    Note the ambiguity when 0 is returned.  Use GetLastError
1711  *    to make sure there was an error (and to know which one).
1712  */
1713 INT WINAPI SetScrollPos(
1714 HWND hwnd /* [in] Handle of window whose scrollbar will be affected */,
1715 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */,
1716 INT nPos /* [in] New value */,
1717 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */ )
1718 {
1719     SCROLLINFO info;
1720     SCROLLBAR_INFO *infoPtr;
1721     INT oldPos;
1722
1723     if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return 0;
1724     oldPos      = infoPtr->curVal;
1725     info.cbSize = sizeof(info);
1726     info.nPos   = nPos;
1727     info.fMask  = SIF_POS;
1728     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1729     return oldPos;
1730 }
1731
1732
1733 /*************************************************************************
1734  *           GetScrollPos   (USER32.@)
1735  *
1736  * RETURNS
1737  *    Success: Current position
1738  *    Failure: 0
1739  *
1740  * REMARKS
1741  *    There is ambiguity when 0 is returned.  Use GetLastError
1742  *    to make sure there was an error (and to know which one).
1743  */
1744 INT WINAPI GetScrollPos(
1745 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1746 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */)
1747 {
1748     TRACE("hwnd=%p nBar=%d\n", hwnd, nBar);
1749
1750     /* Refer SB_CTL requests to the window */
1751     if (nBar == SB_CTL)
1752         return SendMessageA(hwnd, SBM_GETPOS, (WPARAM)0, (LPARAM)0);
1753     else
1754         return SCROLL_GetScrollPos(hwnd, nBar);
1755 }
1756
1757
1758 /*************************************************************************
1759  *           SetScrollRange   (USER32.@)
1760  *
1761  * RETURNS STD
1762  */
1763 BOOL WINAPI SetScrollRange(
1764 HWND hwnd, /* [in] Handle of window whose scrollbar will be affected */
1765 INT nBar, /* [in] One of SB_HORZ, SB_VERT, or SB_CTL */
1766 INT minVal, /* [in] New minimum value */
1767 INT maxVal, /* [in] New maximum value */
1768 BOOL bRedraw /* [in] Should scrollbar be redrawn afterwards ? */)
1769 {
1770     SCROLLINFO info;
1771
1772     info.cbSize = sizeof(info);
1773     info.nMin   = minVal;
1774     info.nMax   = maxVal;
1775     info.fMask  = SIF_RANGE;
1776     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1777     return TRUE;
1778 }
1779
1780
1781 /*************************************************************************
1782  *           SCROLL_SetNCSbState
1783  *
1784  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1785  */
1786 INT SCROLL_SetNCSbState(HWND hwnd, int vMin, int vMax, int vPos,
1787                         int hMin, int hMax, int hPos)
1788 {
1789     INT vA, hA;
1790     SCROLLINFO vInfo, hInfo;
1791
1792     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1793     vInfo.nMin   = vMin;
1794     vInfo.nMax   = vMax;
1795     vInfo.nPos   = vPos;
1796     hInfo.nMin   = hMin;
1797     hInfo.nMax   = hMax;
1798     hInfo.nPos   = hPos;
1799     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1800
1801     SCROLL_SetScrollInfo( hwnd, SB_VERT, &vInfo, &vA );
1802     SCROLL_SetScrollInfo( hwnd, SB_HORZ, &hInfo, &hA );
1803
1804     if( !SCROLL_ShowScrollBar( hwnd, SB_BOTH,
1805                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1806     {
1807         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1808         if( vA & SA_SSI_REFRESH )
1809             SCROLL_RefreshScrollBar( hwnd, SB_VERT, FALSE, TRUE );
1810
1811         if( hA & SA_SSI_REFRESH )
1812             SCROLL_RefreshScrollBar( hwnd, SB_HORZ, FALSE, TRUE );
1813     }
1814     return 0;
1815 }
1816
1817
1818 /*************************************************************************
1819  *           GetScrollRange   (USER32.@)
1820  *
1821  * RETURNS STD
1822  */
1823 BOOL WINAPI GetScrollRange(
1824 HWND hwnd /* [in] Handle of window with scrollbar(s) */,
1825 INT nBar /* [in] One of SB_HORZ, SB_VERT, or SB_CTL  */,
1826 LPINT lpMin /* [out] Where to store minimum value */,
1827 LPINT lpMax /* [out] Where to store maximum value */)
1828 {
1829     TRACE("hwnd=%p nBar=%d lpMin=%p lpMax=%p\n", hwnd, nBar, lpMin, lpMax);
1830
1831     /* Refer SB_CTL requests to the window */
1832     if (nBar == SB_CTL)
1833         return SendMessageA(hwnd, SBM_GETRANGE, (WPARAM)lpMin, (LPARAM)lpMax);
1834     else
1835         return SCROLL_GetScrollRange(hwnd, nBar, lpMin, lpMax);
1836 }
1837
1838
1839 /*************************************************************************
1840  *           SCROLL_ShowScrollBar()
1841  *
1842  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1843  */
1844 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1845                              BOOL fShowH, BOOL fShowV )
1846 {
1847     LONG style = GetWindowLongW( hwnd, GWL_STYLE );
1848
1849     TRACE("hwnd=%p bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV );
1850
1851     switch(nBar)
1852     {
1853     case SB_CTL:
1854         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1855         return TRUE;
1856
1857     case SB_BOTH:
1858     case SB_HORZ:
1859         if (fShowH)
1860         {
1861             fShowH = !(style & WS_HSCROLL);
1862             style |= WS_HSCROLL;
1863         }
1864         else  /* hide it */
1865         {
1866             fShowH = (style & WS_HSCROLL);
1867             style &= ~WS_HSCROLL;
1868         }
1869         if( nBar == SB_HORZ ) {
1870             fShowV = FALSE;
1871             break;
1872         }
1873         /* fall through */
1874
1875     case SB_VERT:
1876         if (fShowV)
1877         {
1878             fShowV = !(style & WS_VSCROLL);
1879             style |= WS_VSCROLL;
1880         }
1881         else  /* hide it */
1882         {
1883             fShowV = (style & WS_VSCROLL);
1884             style &= ~WS_VSCROLL;
1885         }
1886         if ( nBar == SB_VERT )
1887            fShowH = FALSE;
1888         break;
1889
1890     default:
1891         return FALSE;  /* Nothing to do! */
1892     }
1893
1894     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1895     {
1896         WIN_SetStyle( hwnd, style );
1897         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1898                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1899         return TRUE;
1900     }
1901     return FALSE; /* no frame changes */
1902 }
1903
1904
1905 /*************************************************************************
1906  *           ShowScrollBar   (USER32.@)
1907  *
1908  * RETURNS STD
1909  */
1910 BOOL WINAPI ShowScrollBar(
1911 HWND hwnd, /* [in] Handle of window whose scrollbar(s) will be affected   */
1912 INT nBar, /* [in] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1913 BOOL fShow /* [in] TRUE = show, FALSE = hide  */)
1914 {
1915     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1916                                       (nBar == SB_HORZ) ? 0 : fShow );
1917     return TRUE;
1918 }
1919
1920
1921 /*************************************************************************
1922  *           EnableScrollBar   (USER32.@)
1923  */
1924 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1925 {
1926     BOOL bFineWithMe;
1927     SCROLLBAR_INFO *infoPtr;
1928
1929     TRACE("%p %d %d\n", hwnd, nBar, flags );
1930
1931     flags &= ESB_DISABLE_BOTH;
1932
1933     if (nBar == SB_BOTH)
1934     {
1935         if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, SB_VERT ))) return FALSE;
1936         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1937         {
1938             infoPtr->flags = flags;
1939             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1940         }
1941         nBar = SB_HORZ;
1942     }
1943     else
1944         bFineWithMe = TRUE;
1945
1946     if (!(infoPtr = SCROLL_GetScrollBarInfo( hwnd, nBar ))) return FALSE;
1947     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1948     infoPtr->flags = flags;
1949
1950     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1951     return TRUE;
1952 }