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

   1 /*
   2  * Scrollbar control
   3  *
   4  * Copyright 1993 Martin Ayotte
   5  * Copyright 1994, 1996 Alexandre Julliard
   6  */
   7
   8 #include "wine/winuser16.h"
   9 #include "scroll.h"
  10 #include "heap.h"
  11 #include "win.h"
  12 #include "debugtools.h"
  13 #include "cache.h"
  14 #include "tweak.h"
  15
  16 DEFAULT_DEBUG_CHANNEL(scroll)
  17
  18
  19 static HBITMAP hUpArrow = 0;
  20 static HBITMAP hDnArrow = 0;
  21 static HBITMAP hLfArrow = 0;
  22 static HBITMAP hRgArrow = 0;
  23 static HBITMAP hUpArrowD = 0;
  24 static HBITMAP hDnArrowD = 0;
  25 static HBITMAP hLfArrowD = 0;
  26 static HBITMAP hRgArrowD = 0;
  27 static HBITMAP hUpArrowI = 0;
  28 static HBITMAP hDnArrowI = 0;
  29 static HBITMAP hLfArrowI = 0;
  30 static HBITMAP hRgArrowI = 0;
  31
  32 #define TOP_ARROW(flags,pressed) \
  33    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  34 #define BOTTOM_ARROW(flags,pressed) \
  35    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  36 #define LEFT_ARROW(flags,pressed) \
  37    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  38 #define RIGHT_ARROW(flags,pressed) \
  39    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  40
  41
  42   /* Minimum size of the rectangle between the arrows */
  43 #define SCROLL_MIN_RECT  4
  44
  45   /* Minimum size of the thumb in pixels */
  46 #define SCROLL_MIN_THUMB 6
  47
  48   /* Overlap between arrows and thumb */
  49 #define SCROLL_ARROW_THUMB_OVERLAP 1
  50
  51   /* Delay (in ms) before first repetition when holding the button down */
  52 #define SCROLL_FIRST_DELAY   200
  53
  54   /* Delay (in ms) between scroll repetitions */
  55 #define SCROLL_REPEAT_DELAY  50
  56
  57   /* Scroll timer id */
  58 #define SCROLL_TIMER   0
  59
  60   /* Scroll-bar hit testing */
  61 enum SCROLL_HITTEST
  62 {
  63     SCROLL_NOWHERE,      /* Outside the scroll bar */
  64     SCROLL_TOP_ARROW,    /* Top or left arrow */
  65     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  66     SCROLL_THUMB,        /* Thumb rectangle */
  67     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  68     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  69 };
  70
  71  /* What to do after SCROLL_SetScrollInfo() */
  72 #define SA_SSI_HIDE             0x0001
  73 #define SA_SSI_SHOW             0x0002
  74 #define SA_SSI_REFRESH          0x0004
  75 #define SA_SSI_REPAINT_ARROWS   0x0008
  76
  77  /* Thumb-tracking info */
  78 static HWND SCROLL_TrackingWin = 0;
  79 static INT  SCROLL_TrackingBar = 0;
  80 static INT  SCROLL_TrackingPos = 0;
  81 static INT  SCROLL_TrackingVal = 0;
  82  /* Hit test code of the last button-down event */
  83 static enum SCROLL_HITTEST SCROLL_trackHitTest;
  84 static BOOL SCROLL_trackVertical;
  85
  86  /* Is the moving thumb being displayed? */
  87 static BOOL SCROLL_MovingThumb = FALSE;
  88
  89  /* Local functions */
  90 static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
  91                                     BOOL fShowH, BOOL fShowV );
  92 static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
  93                                    const SCROLLINFO *info, INT *action );
  94
  95 /***********************************************************************
  96  *           SCROLL_LoadBitmaps
  97  */
  98 static void SCROLL_LoadBitmaps(void)
  99 {
 100     hUpArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
 101     hDnArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
 102     hLfArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
 103     hRgArrow  = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
 104     hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
 105     hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
 106     hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
 107     hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
 108     hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
 109     hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
 110     hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
 111     hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
 112 }
 113
 114
 115 /***********************************************************************
 116  *           SCROLL_GetPtrScrollInfo
 117  */
 118 static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT nBar )
 119 {
 120     SCROLLBAR_INFO *infoPtr;
 121
 122     if (!wndPtr) return NULL;
 123     switch(nBar)
 124     {
 125         case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break;
 126         case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break;
 127         case SB_CTL:  infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break;
 128         default:      return NULL;
 129     }
 130
 131     if (!infoPtr)  /* Create the info structure if needed */
 132     {
 133         if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) )))
 134         {
 135             infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0;
 136             infoPtr->MaxVal = 100;
 137             infoPtr->flags  = ESB_ENABLE_BOTH;
 138             if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr;
 139             else wndPtr->pVScroll = infoPtr;
 140         }
 141         if (!hUpArrow) SCROLL_LoadBitmaps();
 142     }
 143     return infoPtr;
 144 }
 145
 146
 147 /***********************************************************************
 148  *           SCROLL_GetScrollInfo
 149  */
 150 static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND hwnd, INT nBar )
 151 {
 152    SCROLLBAR_INFO *retvalue;
 153    WND *wndPtr = WIN_FindWndPtr( hwnd );
 154    retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 155    WIN_ReleaseWndPtr(wndPtr);
 156    return retvalue;
 157 }
 158
 159
 160 /***********************************************************************
 161  *           SCROLL_GetScrollBarRect
 162  *
 163  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 164  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 165  * 'arrowSize' returns the width or height of an arrow (depending on
 166  * the orientation of the scrollbar), 'thumbSize' returns the size of
 167  * the thumb, and 'thumbPos' returns the position of the thumb
 168  * relative to the left or to the top.
 169  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 170  */
 171 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
 172                                        INT *arrowSize, INT *thumbSize,
 173                                        INT *thumbPos )
 174 {
 175     INT pixels;
 176     BOOL vertical;
 177     WND *wndPtr = WIN_FindWndPtr( hwnd );
 178
 179     switch(nBar)
 180     {
 181       case SB_HORZ:
 182         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left;
 183         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 184         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 185         lprect->bottom = lprect->top + GetSystemMetrics(SM_CYHSCROLL);
 186         if(wndPtr->dwStyle & WS_BORDER) {
 187           lprect->left--;
 188           lprect->right++;
 189         } else if(wndPtr->dwStyle & WS_VSCROLL)
 190           lprect->right++;
 191         vertical = FALSE;
 192         break;
 193
 194       case SB_VERT:
 195         lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 196         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top;
 197         lprect->right  = lprect->left + GetSystemMetrics(SM_CXVSCROLL);
 198         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 199         if(wndPtr->dwStyle & WS_BORDER) {
 200           lprect->top--;
 201           lprect->bottom++;
 202         } else if(wndPtr->dwStyle & WS_HSCROLL)
 203           lprect->bottom++;
 204         vertical = TRUE;
 205         break;
 206
 207       case SB_CTL:
 208         GetClientRect( hwnd, lprect );
 209         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 210         break;
 211
 212     default:
 213         WIN_ReleaseWndPtr(wndPtr);
 214         return FALSE;
 215     }
 216
 217     if (vertical) pixels = lprect->bottom - lprect->top;
 218     else pixels = lprect->right - lprect->left;
 219
 220     if (pixels <= 2*GetSystemMetrics(SM_CXVSCROLL) + SCROLL_MIN_RECT)
 221     {
 222         if (pixels > SCROLL_MIN_RECT)
 223             *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 224         else
 225             *arrowSize = 0;
 226         *thumbPos = *thumbSize = 0;
 227     }
 228     else
 229     {
 230         SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 231
 232         *arrowSize = GetSystemMetrics(SM_CXVSCROLL);
 233         pixels -= (2 * (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP));
 234
 235         if (info->Page)
 236         {
 237             *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1);
 238             if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB;
 239         }
 240         else *thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 241
 242         if (((pixels -= *thumbSize ) < 0) ||
 243             ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH))
 244         {
 245             /* Rectangle too small or scrollbar disabled -> no thumb */
 246             *thumbPos = *thumbSize = 0;
 247         }
 248         else
 249         {
 250             INT max = info->MaxVal - MAX( info->Page-1, 0 );
 251             if (info->MinVal >= max)
 252                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 253             else
 254                 *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP
 255                  + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal);
 256         }
 257     }
 258     WIN_ReleaseWndPtr(wndPtr);
 259     return vertical;
 260 }
 261
 262
 263 /***********************************************************************
 264  *           SCROLL_GetThumbVal
 265  *
 266  * Compute the current scroll position based on the thumb position in pixels
 267  * from the top of the scroll-bar.
 268  */
 269 static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
 270                                   BOOL vertical, INT pos )
 271 {
 272     INT thumbSize;
 273     INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 274
 275     if ((pixels -= 2*(GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP)) <= 0)
 276         return infoPtr->MinVal;
 277
 278     if (infoPtr->Page)
 279     {
 280         thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1);
 281         if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB;
 282     }
 283     else thumbSize = GetSystemMetrics(SM_CXVSCROLL);
 284
 285     if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
 286
 287     pos = MAX( 0, pos - (GetSystemMetrics(SM_CXVSCROLL) - SCROLL_ARROW_THUMB_OVERLAP) );
 288     if (pos > pixels) pos = pixels;
 289
 290     if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal;
 291     else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1;
 292     return infoPtr->MinVal + ((pos + pixels / 2) / pixels);
 293 }
 294
 295 /***********************************************************************
 296  *           SCROLL_PtInRectEx
 297  */
 298 static BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
 299 {
 300     RECT rect = *lpRect;
 301
 302     if (vertical)
 303     {
 304         rect.left -= lpRect->right - lpRect->left;
 305         rect.right += lpRect->right - lpRect->left;
 306     }
 307     else
 308     {
 309         rect.top -= lpRect->bottom - lpRect->top;
 310         rect.bottom += lpRect->bottom - lpRect->top;
 311     }
 312     return PtInRect( &rect, pt );
 313 }
 314
 315 /***********************************************************************
 316  *           SCROLL_ClipPos
 317  */
 318 static POINT SCROLL_ClipPos( LPRECT lpRect, POINT pt )
 319 {
 320     if( pt.x < lpRect->left )
 321         pt.x = lpRect->left;
 322     else
 323     if( pt.x > lpRect->right )
 324         pt.x = lpRect->right;
 325
 326     if( pt.y < lpRect->top )
 327         pt.y = lpRect->top;
 328     else
 329     if( pt.y > lpRect->bottom )
 330         pt.y = lpRect->bottom;
 331
 332     return pt;
 333 }
 334
 335
 336 /***********************************************************************
 337  *           SCROLL_HitTest
 338  *
 339  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 340  */
 341 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, INT nBar,
 342                                            POINT pt, BOOL bDragging )
 343 {
 344     INT arrowSize, thumbSize, thumbPos;
 345     RECT rect;
 346
 347     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 348                                            &arrowSize, &thumbSize, &thumbPos );
 349
 350     if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
 351          (!PtInRect( &rect, pt )) ) return SCROLL_NOWHERE;
 352
 353     if (vertical)
 354     {
 355         if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW;
 356         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 357         if (!thumbPos) return SCROLL_TOP_RECT;
 358         pt.y -= rect.top;
 359         if (pt.y < thumbPos) return SCROLL_TOP_RECT;
 360         if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 361     }
 362     else  /* horizontal */
 363     {
 364         if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW;
 365         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 366         if (!thumbPos) return SCROLL_TOP_RECT;
 367         pt.x -= rect.left;
 368         if (pt.x < thumbPos) return SCROLL_TOP_RECT;
 369         if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT;
 370     }
 371     return SCROLL_THUMB;
 372 }
 373
 374
 375 /***********************************************************************
 376  *           SCROLL_DrawArrows
 377  *
 378  * Draw the scroll bar arrows.
 379  */
 380 static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
 381                                RECT *rect, INT arrowSize, BOOL vertical,
 382                                BOOL top_pressed, BOOL bottom_pressed )
 383 {
 384     HDC hdcMem = CreateCompatibleDC( hdc );
 385     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 386                                     TOP_ARROW(infoPtr->flags, top_pressed)
 387                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 388     INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 1 : 0;
 389
 390     if (offset) arrowSize--;
 391     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 392     StretchBlt( hdc, rect->left+offset, rect->top+offset,
 393                   vertical ? rect->right-(rect->left+offset) : arrowSize,
 394                   vertical ? arrowSize : rect->bottom-(rect->top+offset),
 395                   hdcMem, 0, 0,
 396                   GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 397                   SRCCOPY );
 398
 399     SelectObject( hdcMem, vertical ?
 400                     BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 401                     : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 402     if (vertical)
 403         StretchBlt( hdc, (rect->left+offset), rect->bottom - arrowSize,
 404                       rect->right - (rect->left+offset), arrowSize,
 405                       hdcMem, 0, 0,
 406                       GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
 407                       SRCCOPY );
 408     else
 409         StretchBlt( hdc, rect->right - arrowSize, rect->top+offset,
 410                       arrowSize, rect->bottom - (rect->top+offset),
 411                       hdcMem, 0, 0,
 412                       GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
 413                       SRCCOPY );
 414     SelectObject( hdcMem, hbmpPrev );
 415     DeleteDC( hdcMem );
 416 }
 417
 418
 419 /***********************************************************************
 420  *           SCROLL_DrawMovingThumb
 421  *
 422  * Draw the moving thumb rectangle.
 423  */
 424 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 425                                     INT arrowSize, INT thumbSize )
 426 {
 427     RECT r = *rect;
 428     if (vertical)
 429     {
 430         r.top += SCROLL_TrackingPos;
 431         if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 432             r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 433         if (r.top + thumbSize >
 434                        rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 435             r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 436                                                                   - thumbSize;
 437         r.bottom = r.top + thumbSize;
 438     }
 439     else
 440     {
 441         r.left += SCROLL_TrackingPos;
 442         if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 443             r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 444         if (r.left + thumbSize >
 445                        rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP))
 446             r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)
 447                                                                   - thumbSize;
 448         r.right = r.left + thumbSize;
 449     }
 450     DrawFocusRect( hdc, &r );
 451     SCROLL_MovingThumb = !SCROLL_MovingThumb;
 452 }
 453
 454
 455 /***********************************************************************
 456  *           SCROLL_DrawInterior
 457  *
 458  * Draw the scroll bar interior (everything except the arrows).
 459  */
 460 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
 461                                  RECT *rect, INT arrowSize,
 462                                  INT thumbSize, INT thumbPos,
 463                                  UINT flags, BOOL vertical,
 464                                  BOOL top_selected, BOOL bottom_selected )
 465 {
 466     RECT r;
 467     HPEN hSavePen;
 468     HBRUSH hSaveBrush,hBrush;
 469     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 470
 471     if (Save_SCROLL_MovingThumb &&
 472         (SCROLL_TrackingWin == hwnd) &&
 473         (SCROLL_TrackingBar == nBar))
 474         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 475
 476       /* Select the correct brush and pen */
 477
 478     if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 479     {
 480         /* This ought to be the color of the parent window */
 481         if (TWEAK_WineLook == WIN31_LOOK) {
 482             hBrush = GetSysColorBrush(COLOR_WINDOW);
 483         } else {
 484             /* Under Win9x look & feel, scrollbars don't have a solid border.
 485              * To make scrollbar's background different from the window
 486              * background, we need to apply a gray 0x55aa pattern brush.
 487              * Otherwise it won't look good.
 488              */
 489             hBrush = CACHE_GetPattern55AABrush();
 490        }
 491     }
 492     else
 493     {
 494         /* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
 495          * The window-owned scrollbars need to call DEFWND_ControlColor
 496          * to correctly setup default scrollbar colors
 497          */
 498         if (nBar == SB_CTL) {
 499             hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 500                                            (WPARAM)hdc,(LPARAM)hwnd);
 501         } else {
 502             hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
 503         }
 504     }
 505     hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
 506     hSaveBrush = SelectObject( hdc, hBrush );
 507
 508       /* Calculate the scroll rectangle */
 509
 510     r = *rect;
 511     if (vertical)
 512     {
 513         r.top    += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 514         r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 515     }
 516     else
 517     {
 518         r.left  += arrowSize - SCROLL_ARROW_THUMB_OVERLAP;
 519         r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 520     }
 521
 522       /* Draw the scroll bar frame */
 523
 524         /* Only draw outline if Win 3.1.  Mar 24, 1999 - Ronald B. Cemer */
 525     if (TWEAK_WineLook == WIN31_LOOK)
 526         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 527
 528       /* Draw the scroll rectangles and thumb */
 529
 530     if (!thumbPos)  /* No thumb to draw */
 531     {
 532         PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
 533                   r.bottom - r.top - 2, PATCOPY );
 534
 535         /* cleanup and return */
 536         SelectObject( hdc, hSavePen );
 537         SelectObject( hdc, hSaveBrush );
 538         return;
 539     }
 540
 541     if (vertical)
 542     {
 543         PatBlt( hdc, r.left + 1, r.top + 1,
 544                   r.right - r.left - 2,
 545                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
 546                   top_selected ? 0x0f0000 : PATCOPY );
 547         r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 548         PatBlt( hdc, r.left + 1, r.top + thumbSize,
 549                   r.right - r.left - 2,
 550                   r.bottom - r.top - thumbSize - 1,
 551                   bottom_selected ? 0x0f0000 : PATCOPY );
 552         r.bottom = r.top + thumbSize;
 553     }
 554     else  /* horizontal */
 555     {
 556         PatBlt( hdc, r.left + 1, r.top + 1,
 557                   thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1,
 558                   r.bottom - r.top - 2,
 559                   top_selected ? 0x0f0000 : PATCOPY );
 560         r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
 561         PatBlt( hdc, r.left + thumbSize, r.top + 1,
 562                   r.right - r.left - thumbSize - 1,
 563                   r.bottom - r.top - 2,
 564                   bottom_selected ? 0x0f0000 : PATCOPY );
 565         r.right = r.left + thumbSize;
 566     }
 567
 568       /* Draw the thumb */
 569
 570     SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
 571     if (TWEAK_WineLook == WIN31_LOOK)
 572     {
 573         Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 574         r.top++, r.left++;
 575     }
 576     else
 577     {
 578         r.top++, r.left++;
 579         r.bottom--; r.right--;
 580         Rectangle( hdc, r.left, r.top, r.right-1, r.bottom-1 );
 581     }
 582     DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
 583
 584     if (Save_SCROLL_MovingThumb &&
 585         (SCROLL_TrackingWin == hwnd) &&
 586         (SCROLL_TrackingBar == nBar))
 587         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
 588
 589     /* cleanup */
 590     SelectObject( hdc, hSavePen );
 591     SelectObject( hdc, hSaveBrush );
 592 }
 593
 594
 595 /***********************************************************************
 596  *           SCROLL_DrawScrollBar
 597  *
 598  * Redraw the whole scrollbar.
 599  */
 600 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
 601                            BOOL arrows, BOOL interior )
 602 {
 603     INT arrowSize, thumbSize, thumbPos;
 604     RECT rect;
 605     BOOL vertical;
 606     WND *wndPtr = WIN_FindWndPtr( hwnd );
 607     SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 608     BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
 609
 610     if (!wndPtr || !infoPtr ||
 611         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 612         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
 613     if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
 614
 615     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 616                                         &arrowSize, &thumbSize, &thumbPos );
 617
 618     if (Save_SCROLL_MovingThumb &&
 619         (SCROLL_TrackingWin == hwnd) &&
 620         (SCROLL_TrackingBar == nBar))
 621         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 622
 623       /* Draw the arrows */
 624
 625     if (arrows && arrowSize)
 626     {
 627         if( vertical == SCROLL_trackVertical && GetCapture() == hwnd )
 628             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 629                                (SCROLL_trackHitTest == SCROLL_TOP_ARROW),
 630                                (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) );
 631         else
 632             SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 633                                                                FALSE, FALSE );
 634     }
 635     if( interior )
 636         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 637                          thumbPos, infoPtr->flags, vertical, FALSE, FALSE );
 638
 639     if (Save_SCROLL_MovingThumb &&
 640         (SCROLL_TrackingWin == hwnd) &&
 641         (SCROLL_TrackingBar == nBar))
 642         SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
 643
 644 END:
 645     WIN_ReleaseWndPtr(wndPtr);
 646 }
 647
 648
 649 /***********************************************************************
 650  *           SCROLL_RefreshScrollBar
 651  *
 652  * Repaint the scroll bar interior after a SetScrollRange() or
 653  * SetScrollPos() call.
 654  */
 655 static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
 656                                      BOOL arrows, BOOL interior )
 657 {
 658     HDC hdc = GetDCEx( hwnd, 0,
 659                            DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
 660     if (!hdc) return;
 661
 662     SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
 663     ReleaseDC( hwnd, hdc );
 664 }
 665
 666
 667 /***********************************************************************
 668  *           SCROLL_HandleKbdEvent
 669  *
 670  * Handle a keyboard event (only for SB_CTL scrollbars).
 671  */
 672 static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
 673 {
 674     WND *wndPtr = WIN_FindWndPtr( hwnd );
 675     WPARAM msg;
 676
 677     switch(wParam)
 678     {
 679     case VK_PRIOR: msg = SB_PAGEUP; break;
 680     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 681     case VK_HOME:  msg = SB_TOP; break;
 682     case VK_END:   msg = SB_BOTTOM; break;
 683     case VK_UP:    msg = SB_LINEUP; break;
 684     case VK_DOWN:  msg = SB_LINEDOWN; break;
 685     default:
 686         WIN_ReleaseWndPtr(wndPtr);
 687         return;
 688     }
 689     SendMessageA( GetParent(hwnd),
 690                     (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 691                     msg, hwnd );
 692     WIN_ReleaseWndPtr(wndPtr);
 693 }
 694
 695
 696 /***********************************************************************
 697  *           SCROLL_HandleScrollEvent
 698  *
 699  * Handle a mouse or timer event for the scrollbar.
 700  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 701  * windows coordinates.
 702  */
 703 void SCROLL_HandleScrollEvent( HWND hwnd, INT nBar, UINT msg, POINT pt)
 704 {
 705       /* Previous mouse position for timer events */
 706     static POINT prevPt;
 707       /* Thumb position when tracking started. */
 708     static UINT trackThumbPos;
 709       /* Position in the scroll-bar of the last button-down event. */
 710     static INT lastClickPos;
 711       /* Position in the scroll-bar of the last mouse event. */
 712     static INT lastMousePos;
 713
 714     enum SCROLL_HITTEST hittest;
 715     HWND hwndOwner, hwndCtl;
 716     BOOL vertical;
 717     INT arrowSize, thumbSize, thumbPos;
 718     RECT rect;
 719     HDC hdc;
 720
 721     SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 722     if (!infoPtr) return;
 723     if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
 724                   return;
 725
 726     hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
 727     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 728                                         &arrowSize, &thumbSize, &thumbPos );
 729     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 730     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 731
 732     switch(msg)
 733     {
 734       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 735           SCROLL_trackVertical = vertical;
 736           SCROLL_trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 737           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 738           lastMousePos  = lastClickPos;
 739           trackThumbPos = thumbPos;
 740           prevPt = pt;
 741           SetCapture( hwnd );
 742           if (nBar == SB_CTL) SetFocus( hwnd );
 743           break;
 744
 745       case WM_MOUSEMOVE:
 746           hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE );
 747           prevPt = pt;
 748           break;
 749
 750       case WM_LBUTTONUP:
 751           hittest = SCROLL_NOWHERE;
 752           ReleaseCapture();
 753           break;
 754
 755       case WM_SYSTIMER:
 756           pt = prevPt;
 757           hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE );
 758           break;
 759
 760       default:
 761           return;  /* Should never happen */
 762     }
 763
 764     TRACE("Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n",
 765                  hwnd, nBar, msg, pt.x, pt.y, hittest );
 766
 767     switch(SCROLL_trackHitTest)
 768     {
 769     case SCROLL_NOWHERE:  /* No tracking in progress */
 770         break;
 771
 772     case SCROLL_TOP_ARROW:
 773         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 774                            (hittest == SCROLL_trackHitTest), FALSE );
 775         if (hittest == SCROLL_trackHitTest)
 776         {
 777             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 778             {
 779                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 780                                 SB_LINEUP, hwndCtl );
 781                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 782                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 783                                   (TIMERPROC)0 );
 784             }
 785         }
 786         else KillSystemTimer( hwnd, SCROLL_TIMER );
 787         break;
 788
 789     case SCROLL_TOP_RECT:
 790         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 791                              thumbPos, infoPtr->flags, vertical,
 792                              (hittest == SCROLL_trackHitTest), FALSE );
 793         if (hittest == SCROLL_trackHitTest)
 794         {
 795             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 796             {
 797                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 798                                 SB_PAGEUP, hwndCtl );
 799                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 800                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 801                                   (TIMERPROC)0 );
 802             }
 803         }
 804         else KillSystemTimer( hwnd, SCROLL_TIMER );
 805         break;
 806
 807     case SCROLL_THUMB:
 808         if (msg == WM_LBUTTONDOWN)
 809         {
 810             SCROLL_TrackingWin = hwnd;
 811             SCROLL_TrackingBar = nBar;
 812             SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
 813             if (!SCROLL_MovingThumb)
 814                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
 815         }
 816         else if (msg == WM_LBUTTONUP)
 817         {
 818             if (SCROLL_MovingThumb)
 819                 SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
 820             SCROLL_TrackingWin = 0;
 821             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 822                                  thumbPos, infoPtr->flags, vertical,
 823                                  FALSE, FALSE );
 824         }
 825         else  /* WM_MOUSEMOVE */
 826         {
 827             UINT pos;
 828
 829             if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos;
 830             else
 831             {
 832                 pt = SCROLL_ClipPos( &rect, pt );
 833                 pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 834             }
 835             if ( (pos != lastMousePos) || (!SCROLL_MovingThumb) )
 836             {
 837                 if (SCROLL_MovingThumb)
 838                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
 839                                         arrowSize, thumbSize );
 840                 lastMousePos = pos;
 841                 SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
 842                 SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
 843                                                          vertical,
 844                                                          SCROLL_TrackingPos );
 845                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 846                                 MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
 847                                 hwndCtl );
 848                 if (!SCROLL_MovingThumb)
 849                     SCROLL_DrawMovingThumb( hdc, &rect, vertical,
 850                                         arrowSize, thumbSize );
 851             }
 852         }
 853         break;
 854
 855     case SCROLL_BOTTOM_RECT:
 856         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
 857                              thumbPos, infoPtr->flags, vertical,
 858                              FALSE, (hittest == SCROLL_trackHitTest) );
 859         if (hittest == SCROLL_trackHitTest)
 860         {
 861             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 862             {
 863                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 864                                 SB_PAGEDOWN, hwndCtl );
 865                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 866                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 867                                   (TIMERPROC)0 );
 868             }
 869         }
 870         else KillSystemTimer( hwnd, SCROLL_TIMER );
 871         break;
 872
 873     case SCROLL_BOTTOM_ARROW:
 874         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 875                            FALSE, (hittest == SCROLL_trackHitTest) );
 876         if (hittest == SCROLL_trackHitTest)
 877         {
 878             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 879             {
 880                 SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 881                                 SB_LINEDOWN, hwndCtl );
 882                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 883                                   SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 884                                   (TIMERPROC)0 );
 885             }
 886         }
 887         else KillSystemTimer( hwnd, SCROLL_TIMER );
 888         break;
 889     }
 890
 891     if (msg == WM_LBUTTONUP)
 892     {
 893         hittest = SCROLL_trackHitTest;
 894         SCROLL_trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
 895
 896         if (hittest == SCROLL_THUMB)
 897         {
 898             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
 899                                  trackThumbPos + lastMousePos - lastClickPos );
 900             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 901                             MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
 902         }
 903         else
 904             SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 905                             SB_ENDSCROLL, hwndCtl );
 906     }
 907
 908     ReleaseDC( hwnd, hdc );
 909 }
 910
 911
 912 /***********************************************************************
 913  *           ScrollBarWndProc
 914  */
 915 LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
 916                                  LPARAM lParam )
 917 {
 918     switch(message)
 919     {
 920     case WM_CREATE:
 921         {
 922             CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
 923             if (lpCreat->style & SBS_SIZEBOX)
 924             {
 925                 FIXME("Unimplemented style SBS_SIZEBOX.\n" );
 926                 return 0;
 927             }
 928
 929             if (lpCreat->style & SBS_VERT)
 930             {
 931                 if (lpCreat->style & SBS_LEFTALIGN)
 932                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
 933                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
 934                 else if (lpCreat->style & SBS_RIGHTALIGN)
 935                     MoveWindow( hwnd,
 936                                   lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
 937                                   lpCreat->y,
 938                                   GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
 939             }
 940             else  /* SBS_HORZ */
 941             {
 942                 if (lpCreat->style & SBS_TOPALIGN)
 943                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
 944                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
 945                 else if (lpCreat->style & SBS_BOTTOMALIGN)
 946                     MoveWindow( hwnd,
 947                                   lpCreat->x,
 948                                   lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
 949                                   lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
 950             }
 951         }
 952         if (!hUpArrow) SCROLL_LoadBitmaps();
 953         TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
 954         return 0;
 955
 956     case WM_LBUTTONDOWN:
 957     case WM_LBUTTONUP:
 958     case WM_MOUSEMOVE:
 959     case WM_SYSTIMER:
 960         {
 961             POINT pt;
 962             CONV_POINT16TO32( (POINT16 *)&lParam, &pt );
 963             SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt );
 964         }
 965         break;
 966
 967     case WM_KEYDOWN:
 968         SCROLL_HandleKbdEvent( hwnd, wParam );
 969         break;
 970
 971     case WM_ERASEBKGND:
 972          return 1;
 973
 974     case WM_GETDLGCODE:
 975          return DLGC_WANTARROWS; /* Windows returns this value */
 976
 977     case WM_PAINT:
 978         {
 979             PAINTSTRUCT ps;
 980             HDC hdc = BeginPaint( hwnd, &ps );
 981             SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
 982             EndPaint( hwnd, &ps );
 983         }
 984         break;
 985
 986     case SBM_SETPOS16:
 987     case SBM_SETPOS:
 988         return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
 989
 990     case SBM_GETPOS16:
 991     case SBM_GETPOS:
 992         return GetScrollPos( hwnd, SB_CTL );
 993
 994     case SBM_SETRANGE16:
 995         SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
 996                           wParam  /* FIXME: Is this correct? */ );
 997         return 0;
 998
 999     case SBM_SETRANGE:
1000         SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
1001         return 0;  /* FIXME: return previous position */
1002
1003     case SBM_GETRANGE16:
1004         FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
1005         return 0;
1006
1007     case SBM_GETRANGE:
1008         GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
1009         return 0;
1010
1011     case SBM_ENABLE_ARROWS16:
1012     case SBM_ENABLE_ARROWS:
1013         return EnableScrollBar( hwnd, SB_CTL, wParam );
1014
1015     case SBM_SETRANGEREDRAW:
1016         SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
1017         return 0;  /* FIXME: return previous position */
1018
1019     case SBM_SETSCROLLINFO:
1020         return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
1021
1022     case SBM_GETSCROLLINFO:
1023         return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
1024
1025     case 0x00e5:
1026     case 0x00e7:
1027     case 0x00e8:
1028     case 0x00eb:
1029     case 0x00ec:
1030     case 0x00ed:
1031     case 0x00ee:
1032     case 0x00ef:
1033         ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
1034                     message, wParam, lParam );
1035         break;
1036
1037     default:
1038         if (message >= WM_USER)
1039             WARN("unknown msg %04x wp=%04x lp=%08lx\n",
1040                          message, wParam, lParam );
1041         return DefWindowProcA( hwnd, message, wParam, lParam );
1042     }
1043     return 0;
1044 }
1045
1046
1047 /*************************************************************************
1048  *           SetScrollInfo16   (USER.475)
1049  */
1050 INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
1051                               BOOL16 bRedraw )
1052 {
1053     return (INT16)SetScrollInfo( hwnd, nBar, info, bRedraw );
1054 }
1055
1056
1057 /*************************************************************************
1058  *           SetScrollInfo32   (USER32.501)
1059  * SetScrollInfo32 can be used to set the position, upper bound,
1060  * lower bound, and page size of a scrollbar control.
1061  *
1062  * RETURNS
1063  *    Scrollbar position
1064  *
1065  * NOTE
1066  *    For 100 lines of text to be displayed in a window of 25 lines,
1067  *  one would for instance use info->nMin=0, info->nMax=75
1068  *  (corresponding to the 76 different positions of the window on
1069  *  the text), and info->nPage=25.
1070  */
1071 INT WINAPI SetScrollInfo(
1072 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1073 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1074 const SCROLLINFO *info /* [I] Specifies what to change and new values */,
1075 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1076 {
1077     INT action;
1078     INT retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action );
1079
1080     if( action & SA_SSI_HIDE )
1081         SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE );
1082     else
1083     {
1084         if( action & SA_SSI_SHOW )
1085             if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) )
1086                 return retVal; /* SetWindowPos() already did the painting */
1087
1088         if( bRedraw && (action & SA_SSI_REFRESH))
1089             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1090         else if( action & SA_SSI_REPAINT_ARROWS )
1091             SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE );
1092     }
1093     return retVal;
1094 }
1095
1096 INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
1097                             const SCROLLINFO *info, INT *action  )
1098 {
1099     /* Update the scrollbar state and set action flags according to
1100      * what has to be done graphics wise. */
1101
1102     SCROLLBAR_INFO *infoPtr;
1103     UINT new_flags;
1104
1105     dbg_decl_str(scroll, 256);
1106
1107    *action = 0;
1108
1109     if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0;
1110     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0;
1111     if ((info->cbSize != sizeof(*info)) &&
1112         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0;
1113
1114     /* Set the page size */
1115
1116     if (info->fMask & SIF_PAGE)
1117     {
1118         dsprintf(scroll, " page=%d", info->nPage );
1119         if( infoPtr->Page != info->nPage )
1120         {
1121             infoPtr->Page = info->nPage;
1122            *action |= SA_SSI_REFRESH;
1123         }
1124     }
1125
1126     /* Set the scroll pos */
1127
1128     if (info->fMask & SIF_POS)
1129     {
1130         dsprintf(scroll, " pos=%d", info->nPos );
1131         if( infoPtr->CurVal != info->nPos )
1132         {
1133             infoPtr->CurVal = info->nPos;
1134            *action |= SA_SSI_REFRESH;
1135         }
1136     }
1137
1138     /* Set the scroll range */
1139
1140     if (info->fMask & SIF_RANGE)
1141     {
1142         dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax );
1143
1144         /* Invalid range -> range is set to (0,0) */
1145         if ((info->nMin > info->nMax) ||
1146             ((UINT)(info->nMax - info->nMin) >= 0x80000000))
1147         {
1148             infoPtr->MinVal = 0;
1149             infoPtr->MaxVal = 0;
1150         }
1151         else
1152         {
1153             if( infoPtr->MinVal != info->nMin ||
1154                 infoPtr->MaxVal != info->nMax )
1155             {
1156                *action |= SA_SSI_REFRESH;
1157                 infoPtr->MinVal = info->nMin;
1158                 infoPtr->MaxVal = info->nMax;
1159             }
1160         }
1161     }
1162
1163     TRACE("hwnd=%04x bar=%d %s\n",
1164                     hwnd, nBar, dbg_str(scroll));
1165
1166     /* Make sure the page size is valid */
1167
1168     if (infoPtr->Page < 0) infoPtr->Page = 0;
1169     else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 )
1170         infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1;
1171
1172     /* Make sure the pos is inside the range */
1173
1174     if (infoPtr->CurVal < infoPtr->MinVal)
1175         infoPtr->CurVal = infoPtr->MinVal;
1176     else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1177         infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 );
1178
1179     TRACE("    new values: page=%d pos=%d min=%d max=%d\n",
1180                  infoPtr->Page, infoPtr->CurVal,
1181                  infoPtr->MinVal, infoPtr->MaxVal );
1182
1183     /* Check if the scrollbar should be hidden or disabled */
1184
1185     if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL))
1186     {
1187         new_flags = infoPtr->flags;
1188         if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ))
1189         {
1190             /* Hide or disable scroll-bar */
1191             if (info->fMask & SIF_DISABLENOSCROLL)
1192             {
1193                 new_flags = ESB_DISABLE_BOTH;
1194                *action |= SA_SSI_REFRESH;
1195             }
1196             else if (nBar != SB_CTL)
1197             {
1198                 *action = SA_SSI_HIDE;
1199                 goto done;
1200             }
1201         }
1202         else  /* Show and enable scroll-bar */
1203         {
1204             new_flags = 0;
1205             if (nBar != SB_CTL)
1206                 *action |= SA_SSI_SHOW;
1207         }
1208
1209         if (infoPtr->flags != new_flags) /* check arrow flags */
1210         {
1211             infoPtr->flags = new_flags;
1212            *action |= SA_SSI_REPAINT_ARROWS;
1213         }
1214     }
1215
1216 done:
1217     /* Return current position */
1218
1219     return infoPtr->CurVal;
1220 }
1221
1222
1223 /*************************************************************************
1224  *           GetScrollInfo16   (USER.476)
1225  */
1226 BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info )
1227 {
1228     return GetScrollInfo( hwnd, nBar, info );
1229 }
1230
1231
1232 /*************************************************************************
1233  *           GetScrollInfo32   (USER32.284)
1234  * GetScrollInfo32 can be used to retrieve the position, upper bound,
1235  * lower bound, and page size of a scrollbar control.
1236  *
1237  * RETURNS STD
1238  */
1239 BOOL WINAPI GetScrollInfo(
1240   HWND hwnd /* [I] Handle of window */ ,
1241   INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1242   LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */)
1243 {
1244     SCROLLBAR_INFO *infoPtr;
1245
1246     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1247     if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE;
1248     if ((info->cbSize != sizeof(*info)) &&
1249         (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE;
1250
1251     if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page;
1252     if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal;
1253     if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info)))
1254         info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0;
1255     if (info->fMask & SIF_RANGE)
1256     {
1257         info->nMin = infoPtr->MinVal;
1258         info->nMax = infoPtr->MaxVal;
1259     }
1260     return (info->fMask & SIF_ALL) != 0;
1261 }
1262
1263
1264 /*************************************************************************
1265  *           SetScrollPos16   (USER.62)
1266  */
1267 INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos,
1268                              BOOL16 bRedraw )
1269 {
1270     return (INT16)SetScrollPos( hwnd, nBar, nPos, bRedraw );
1271 }
1272
1273
1274 /*************************************************************************
1275  *           SetScrollPos32   (USER32.502)
1276  *
1277  * RETURNS
1278  *    Success: Scrollbar position
1279  *    Failure: 0
1280  *
1281  * REMARKS
1282  *    Note the ambiguity when 0 is returned.  Use GetLastError
1283  *    to make sure there was an error (and to know which one).
1284  */
1285 INT WINAPI SetScrollPos(
1286 HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
1287 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
1288 INT nPos /* [I] New value */,
1289 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
1290 {
1291     SCROLLINFO info;
1292     SCROLLBAR_INFO *infoPtr;
1293     INT oldPos;
1294
1295     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1296     oldPos      = infoPtr->CurVal;
1297     info.cbSize = sizeof(info);
1298     info.nPos   = nPos;
1299     info.fMask  = SIF_POS;
1300     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1301     return oldPos;
1302 }
1303
1304
1305 /*************************************************************************
1306  *           GetScrollPos16   (USER.63)
1307  */
1308 INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
1309 {
1310     return (INT16)GetScrollPos( hwnd, nBar );
1311 }
1312
1313
1314 /*************************************************************************
1315  *           GetScrollPos32   (USER32.285)
1316  *
1317  * RETURNS
1318  *    Success: Current position
1319  *    Failure: 0
1320  *
1321  * REMARKS
1322  *    Note the ambiguity when 0 is returned.  Use GetLastError
1323  *    to make sure there was an error (and to know which one).
1324  */
1325 INT WINAPI GetScrollPos(
1326 HWND hwnd, /* [I] Handle of window */
1327 INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */)
1328 {
1329     SCROLLBAR_INFO *infoPtr;
1330
1331     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
1332     return infoPtr->CurVal;
1333 }
1334
1335
1336 /*************************************************************************
1337  *           SetScrollRange16   (USER.64)
1338  */
1339 void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar,
1340                               INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw )
1341 {
1342     /* Invalid range -> range is set to (0,0) */
1343     if ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
1344     SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
1345 }
1346
1347
1348 /*************************************************************************
1349  *           SetScrollRange32   (USER32.503)
1350  *
1351  * RETURNS STD
1352  */
1353 BOOL WINAPI SetScrollRange(
1354 HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
1355 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
1356 INT MinVal, /* [I] New minimum value */
1357 INT MaxVal, /* [I] New maximum value */
1358 BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
1359 {
1360     SCROLLINFO info;
1361
1362     info.cbSize = sizeof(info);
1363     info.nMin   = MinVal;
1364     info.nMax   = MaxVal;
1365     info.fMask  = SIF_RANGE;
1366     SetScrollInfo( hwnd, nBar, &info, bRedraw );
1367     return TRUE;
1368 }
1369
1370
1371 /*************************************************************************
1372  *           SCROLL_SetNCSbState
1373  *
1374  * Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
1375  */
1376 INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
1377                                        int hMin, int hMax, int hPos)
1378 {
1379     INT vA, hA;
1380     SCROLLINFO vInfo, hInfo;
1381
1382     vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO);
1383     vInfo.nMin   = vMin;         hInfo.nMin   = hMin;
1384     vInfo.nMax   = vMax;         hInfo.nMax   = hMax;
1385     vInfo.nPos   = vPos;         hInfo.nPos   = hPos;
1386     vInfo.fMask  = hInfo.fMask = SIF_RANGE | SIF_POS;
1387
1388     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA );
1389     SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA );
1390
1391     if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH,
1392                               (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) )
1393     {
1394         /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */
1395         if( vA & SA_SSI_REFRESH )
1396             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE );
1397
1398         if( hA & SA_SSI_REFRESH )
1399             SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE );
1400     }
1401     return 0;
1402 }
1403
1404
1405 /*************************************************************************
1406  *           GetScrollRange16   (USER.65)
1407  */
1408 BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar,
1409                                 LPINT16 lpMin, LPINT16 lpMax)
1410 {
1411     INT min, max;
1412     BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
1413     if (lpMin) *lpMin = min;
1414     if (lpMax) *lpMax = max;
1415     return ret;
1416 }
1417
1418
1419 /*************************************************************************
1420  *           GetScrollRange32   (USER32.286)
1421  *
1422  * RETURNS STD
1423  */
1424 BOOL WINAPI GetScrollRange(
1425 HWND hwnd, /* [I] Handle of window */
1426 INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL  */
1427 LPINT lpMin, /* [O] Where to store minimum value */
1428 LPINT lpMax /* [O] Where to store maximum value */)
1429 {
1430     SCROLLBAR_INFO *infoPtr;
1431
1432     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar )))
1433     {
1434         if (lpMin) lpMin = 0;
1435         if (lpMax) lpMax = 0;
1436         return FALSE;
1437     }
1438     if (lpMin) *lpMin = infoPtr->MinVal;
1439     if (lpMax) *lpMax = infoPtr->MaxVal;
1440     return TRUE;
1441 }
1442
1443
1444 /*************************************************************************
1445  *           SCROLL_ShowScrollBar()
1446  *
1447  * Back-end for ShowScrollBar(). Returns FALSE if no action was taken.
1448  * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT.
1449  */
1450 BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
1451                              BOOL fShowH, BOOL fShowV )
1452 {
1453     WND *wndPtr = WIN_FindWndPtr( hwnd );
1454     BOOL retvalue = FALSE;
1455
1456     if (!wndPtr) return FALSE;
1457     TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
1458                     hwnd, nBar, fShowH, fShowV );
1459
1460     switch(nBar)
1461     {
1462     case SB_CTL:
1463         ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
1464         retvalue = TRUE;
1465         goto END;
1466
1467     case SB_BOTH:
1468     case SB_HORZ:
1469         if (fShowH)
1470         {
1471             fShowH = !(wndPtr->dwStyle & WS_HSCROLL);
1472             wndPtr->dwStyle |= WS_HSCROLL;
1473         }
1474         else  /* hide it */
1475         {
1476             fShowH = (wndPtr->dwStyle & WS_HSCROLL);
1477             wndPtr->dwStyle &= ~WS_HSCROLL;
1478         }
1479         if( nBar == SB_HORZ ) break;
1480         /* fall through */
1481
1482     case SB_VERT:
1483         if (fShowV)
1484         {
1485             fShowV = !(wndPtr->dwStyle & WS_VSCROLL);
1486             wndPtr->dwStyle |= WS_VSCROLL;
1487         }
1488         else  /* hide it */
1489         {
1490             fShowV = (wndPtr->dwStyle & WS_VSCROLL);
1491             wndPtr->dwStyle &= ~WS_VSCROLL;
1492         }
1493         break;
1494
1495     default:
1496         retvalue = FALSE;  /* Nothing to do! */
1497         goto END;
1498     }
1499
1500     if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
1501     {
1502         SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1503                     | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1504         retvalue = TRUE;
1505         goto END;
1506     }
1507
1508     retvalue = FALSE; /* no frame changes */
1509 END:
1510     WIN_ReleaseWndPtr(wndPtr);
1511     return retvalue;
1512 }
1513
1514
1515 /*************************************************************************
1516  *           ShowScrollBar16   (USER.267)
1517  */
1518 void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow )
1519 {
1520     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1521                                       (nBar == SB_HORZ) ? 0 : fShow );
1522 }
1523
1524
1525 /*************************************************************************
1526  *           ShowScrollBar32   (USER32.532)
1527  *
1528  * RETURNS STD
1529  */
1530 BOOL WINAPI ShowScrollBar(
1531 HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected   */
1532 INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
1533 BOOL fShow /* [I] TRUE = show, FALSE = hide  */)
1534 {
1535     SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow,
1536                                       (nBar == SB_HORZ) ? 0 : fShow );
1537     return TRUE;
1538 }
1539
1540
1541 /*************************************************************************
1542  *           EnableScrollBar16   (USER.482)
1543  */
1544 BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags )
1545 {
1546     return EnableScrollBar( hwnd, nBar, flags );
1547 }
1548
1549
1550 /*************************************************************************
1551  *           EnableScrollBar32   (USER32.171)
1552  */
1553 BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
1554 {
1555     BOOL bFineWithMe;
1556     SCROLLBAR_INFO *infoPtr;
1557
1558     TRACE("%04x %d %d\n", hwnd, nBar, flags );
1559
1560     flags &= ESB_DISABLE_BOTH;
1561
1562     if (nBar == SB_BOTH)
1563     {
1564         if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE;
1565         if (!(bFineWithMe = (infoPtr->flags == flags)) )
1566         {
1567             infoPtr->flags = flags;
1568             SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE );
1569         }
1570         nBar = SB_HORZ;
1571     }
1572     else
1573         bFineWithMe = TRUE;
1574
1575     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1576     if (bFineWithMe && infoPtr->flags == flags) return FALSE;
1577     infoPtr->flags = flags;
1578
1579     SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE );
1580     return TRUE;
1581 }