controls/scroll.c

   1 /*
   2  * Interface code to SCROLLBAR widget
   3  *
   4  * Copyright  Martin Ayotte, 1993
   5  * Copyright  Alexandre Julliard, 1994
   6  *
   7  * Small fixes and implemented SB_THUMBPOSITION
   8  * by Peter Broadhurst, 940611
   9  */
  10
  11 #include <stdlib.h>
  12 #include <stdio.h>
  13 #include <sys/types.h>
  14 #include <sys/stat.h>
  15 #include "windows.h"
  16 #include "syscolor.h"
  17 #include "sysmetrics.h"
  18 #include "scroll.h"
  19 #include "user.h"
  20 #include "graphics.h"
  21 #include "win.h"
  22 #include "stddebug.h"
  23 /* #define DEBUG_SCROLL */
  24 #include "debug.h"
  25
  26
  27 static HBITMAP hUpArrow = 0;
  28 static HBITMAP hDnArrow = 0;
  29 static HBITMAP hLfArrow = 0;
  30 static HBITMAP hRgArrow = 0;
  31 static HBITMAP hUpArrowD = 0;
  32 static HBITMAP hDnArrowD = 0;
  33 static HBITMAP hLfArrowD = 0;
  34 static HBITMAP hRgArrowD = 0;
  35 static HBITMAP hUpArrowI = 0;
  36 static HBITMAP hDnArrowI = 0;
  37 static HBITMAP hLfArrowI = 0;
  38 static HBITMAP hRgArrowI = 0;
  39
  40 #define TOP_ARROW(flags,pressed) \
  41    (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow))
  42 #define BOTTOM_ARROW(flags,pressed) \
  43    (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow))
  44 #define LEFT_ARROW(flags,pressed) \
  45    (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow))
  46 #define RIGHT_ARROW(flags,pressed) \
  47    (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow))
  48
  49
  50   /* Minimum size of the rectangle between the arrows */
  51 #define SCROLL_MIN_RECT  4
  52
  53   /* Delay (in ms) before first repetition when holding the button down */
  54 #define SCROLL_FIRST_DELAY   200
  55
  56   /* Delay (in ms) between scroll repetitions */
  57 #define SCROLL_REPEAT_DELAY  100
  58
  59   /* Scroll timer id */
  60 #define SCROLL_TIMER   0
  61
  62   /* Scroll-bar hit testing */
  63 enum SCROLL_HITTEST
  64 {
  65     SCROLL_NOWHERE,      /* Outside the scroll bar */
  66     SCROLL_TOP_ARROW,    /* Top or left arrow */
  67     SCROLL_TOP_RECT,     /* Rectangle between the top arrow and the thumb */
  68     SCROLL_THUMB,        /* Thumb rectangle */
  69     SCROLL_BOTTOM_RECT,  /* Rectangle between the thumb and the bottom arrow */
  70     SCROLL_BOTTOM_ARROW  /* Bottom or right arrow */
  71 };
  72
  73  /* Thumb-tracking info */
  74 static HWND hwndTracking = 0;
  75 static int nBarTracking = 0;
  76 static UINT uTrackingPos = 0;
  77
  78 /***********************************************************************
  79  *           SCROLL_LoadBitmaps
  80  */
  81 static void SCROLL_LoadBitmaps(void)
  82 {
  83     hUpArrow  = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROW));
  84     hDnArrow  = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROW));
  85     hLfArrow  = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROW));
  86     hRgArrow  = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROW));
  87     hUpArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWD));
  88     hDnArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWD));
  89     hLfArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWD));
  90     hRgArrowD = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWD));
  91     hUpArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_UPARROWI));
  92     hDnArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_DNARROWI));
  93     hLfArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_LFARROWI));
  94     hRgArrowI = LoadBitmap((HINSTANCE)NULL, MAKEINTRESOURCE(OBM_RGARROWI));
  95 }
  96
  97 /***********************************************************************
  98  *           SCROLL_GetPtrScrollInfo
  99  */
 100 static SCROLLINFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, int nBar )
 101 {
 102     HANDLE handle;
 103
 104     if (!wndPtr) return NULL;
 105     switch(nBar)
 106     {
 107         case SB_HORZ: handle = wndPtr->hHScroll; break;
 108         case SB_VERT: handle = wndPtr->hVScroll; break;
 109         case SB_CTL:  return (SCROLLINFO *)wndPtr->wExtra;
 110         default:      return NULL;
 111     }
 112
 113     if (!handle)  /* Create the info structure if needed */
 114     {
 115         if ((handle = USER_HEAP_ALLOC( sizeof(SCROLLINFO) )))
 116         {
 117             SCROLLINFO *infoPtr = (SCROLLINFO *) USER_HEAP_LIN_ADDR( handle );
 118             infoPtr->MinVal = infoPtr->CurVal = 0;
 119             infoPtr->MaxVal = 100;
 120             infoPtr->flags  = ESB_ENABLE_BOTH;
 121             if (nBar == SB_HORZ) wndPtr->hHScroll = handle;
 122             else wndPtr->hVScroll = handle;
 123         }
 124         if (!hUpArrow) SCROLL_LoadBitmaps();
 125     }
 126     return (SCROLLINFO *) USER_HEAP_LIN_ADDR( handle );
 127 }
 128
 129 /***********************************************************************
 130  *           SCROLL_GetScrollInfo
 131  */
 132 static SCROLLINFO *SCROLL_GetScrollInfo( HWND hwnd, int nBar )
 133 {
 134    WND *wndPtr = WIN_FindWndPtr( hwnd );
 135    return SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 136 }
 137
 138
 139 /***********************************************************************
 140  *           SCROLL_GetScrollBarRect
 141  *
 142  * Compute the scroll bar rectangle, in drawing coordinates (i.e. client
 143  * coords for SB_CTL, window coords for SB_VERT and SB_HORZ).
 144  * 'arrowSize' returns the width or height of an arrow (depending on the
 145  * orientation of the scrollbar), and 'thumbPos' returns the position of
 146  * the thumb relative to the left or to the top.
 147  * Return TRUE if the scrollbar is vertical, FALSE if horizontal.
 148  */
 149 static BOOL SCROLL_GetScrollBarRect( HWND hwnd, int nBar, RECT *lprect,
 150                                      WORD *arrowSize, WORD *thumbPos )
 151 {
 152     int pixels;
 153     BOOL vertical;
 154     WND *wndPtr = WIN_FindWndPtr( hwnd );
 155
 156     switch(nBar)
 157     {
 158       case SB_HORZ:
 159         lprect->left   = wndPtr->rectClient.left - wndPtr->rectWindow.left - 1;
 160         lprect->top    = wndPtr->rectClient.bottom - wndPtr->rectWindow.top;
 161         lprect->right  = wndPtr->rectClient.right - wndPtr->rectWindow.left +1;
 162         lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL + 1;
 163         vertical = FALSE;
 164         break;
 165
 166       case SB_VERT:
 167         lprect->left   = wndPtr->rectClient.right - wndPtr->rectWindow.left;
 168         lprect->top    = wndPtr->rectClient.top - wndPtr->rectWindow.top - 1;
 169         lprect->right  = lprect->left + SYSMETRICS_CXVSCROLL + 1;
 170         lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top +1;
 171         vertical = TRUE;
 172         break;
 173
 174       case SB_CTL:
 175         GetClientRect( hwnd, lprect );
 176         vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
 177         break;
 178
 179     default:
 180         return FALSE;
 181     }
 182
 183     if (vertical) pixels = lprect->bottom - lprect->top;
 184     else pixels = lprect->right - lprect->left;
 185
 186     if (pixels > 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT)
 187     {
 188         *arrowSize = SYSMETRICS_CXVSCROLL;
 189     }
 190     else if (pixels > SCROLL_MIN_RECT)
 191     {
 192         *arrowSize = (pixels - SCROLL_MIN_RECT) / 2;
 193     }
 194     else *arrowSize = 0;
 195
 196     if ((pixels -= 3*SYSMETRICS_CXVSCROLL+1) > 0)
 197     {
 198         SCROLLINFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 199         if ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 200             *thumbPos = 0;
 201         else if (info->MinVal == info->MaxVal)
 202             *thumbPos = *arrowSize;
 203         else
 204             *thumbPos = *arrowSize + pixels * (info->CurVal - info->MinVal) /
 205                                               (info->MaxVal - info->MinVal);
 206     }
 207     else *thumbPos = 0;
 208     return vertical;
 209 }
 210
 211
 212 /***********************************************************************
 213  *           SCROLL_GetThumbVal
 214  *
 215  * Compute the current scroll position based on the thumb position in pixels
 216  * from the top of the scroll-bar.
 217  */
 218 static UINT SCROLL_GetThumbVal( SCROLLINFO *infoPtr, RECT *rect,
 219                                 BOOL vertical, WORD pos )
 220 {
 221     int pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
 222     if ((pixels -= 3*SYSMETRICS_CXVSCROLL+1) <= 0) return infoPtr->MinVal;
 223     pos = MAX( 0, pos - SYSMETRICS_CXVSCROLL );
 224     if (pos > pixels) pos = pixels;
 225     dprintf_scroll(stddeb,"GetThumbVal: pos=%d ret=%d\n", pos,
 226                    (infoPtr->MinVal
 227             + (UINT)(((int)pos * (infoPtr->MaxVal-infoPtr->MinVal) + pixels/2)
 228                      / pixels)) );
 229     return (infoPtr->MinVal
 230             + (UINT)(((int)pos * (infoPtr->MaxVal-infoPtr->MinVal) + pixels/2)
 231                      / pixels));
 232 }
 233
 234
 235 /***********************************************************************
 236  *           SCROLL_HitTest
 237  *
 238  * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!).
 239  */
 240 static enum SCROLL_HITTEST SCROLL_HitTest( HWND hwnd, int nBar, POINT pt )
 241 {
 242     WORD arrowSize, thumbPos;
 243     RECT rect;
 244
 245     BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 246                                              &arrowSize, &thumbPos );
 247     if (!PtInRect( &rect, pt )) return SCROLL_NOWHERE;
 248
 249     if (vertical)
 250     {
 251         if (pt.y <= rect.top + arrowSize + 1) return SCROLL_TOP_ARROW;
 252         if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW;
 253         if (!thumbPos) return SCROLL_TOP_RECT;
 254         pt.y -= rect.top;
 255         if (pt.y < (INT)thumbPos) return SCROLL_TOP_RECT;
 256         if (pt.y > thumbPos+SYSMETRICS_CYHSCROLL) return SCROLL_BOTTOM_RECT;
 257         return SCROLL_THUMB;
 258     }
 259     else  /* horizontal */
 260     {
 261         if (pt.x <= rect.left + arrowSize) return SCROLL_TOP_ARROW;
 262         if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW;
 263         if (!thumbPos) return SCROLL_TOP_RECT;
 264         pt.x -= rect.left;
 265         if (pt.x < (INT)thumbPos) return SCROLL_TOP_RECT;
 266         if (pt.x > thumbPos+SYSMETRICS_CXVSCROLL) return SCROLL_BOTTOM_RECT;
 267         return SCROLL_THUMB;
 268     }
 269 }
 270
 271
 272 /***********************************************************************
 273  *           SCROLL_DrawArrows
 274  *
 275  * Draw the scroll bar arrows.
 276  */
 277 static void SCROLL_DrawArrows( HDC hdc, SCROLLINFO *infoPtr, RECT *rect,
 278                                WORD arrowSize, BOOL vertical,
 279                                BOOL top_pressed, BOOL bottom_pressed )
 280 {
 281     HDC hdcMem = CreateCompatibleDC( hdc );
 282     HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
 283                                     TOP_ARROW(infoPtr->flags, top_pressed)
 284                                     : LEFT_ARROW(infoPtr->flags, top_pressed));
 285     SetStretchBltMode( hdc, STRETCH_DELETESCANS );
 286     StretchBlt( hdc, rect->left, rect->top,
 287                 vertical ? rect->right-rect->left : arrowSize+1,
 288                 vertical ? arrowSize+1 : rect->bottom-rect->top,
 289                 hdcMem, 0, 0,
 290                 SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
 291                 SRCCOPY );
 292
 293     SelectObject( hdcMem, vertical ?
 294                   BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
 295                   : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
 296     if (vertical)
 297         StretchBlt( hdc, rect->left, rect->bottom - arrowSize - 1,
 298                    rect->right - rect->left, arrowSize + 1,
 299                    hdcMem, 0, 0,
 300                    SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
 301                    SRCCOPY );
 302     else
 303         StretchBlt( hdc, rect->right - arrowSize - 1, rect->top,
 304                    arrowSize + 1, rect->bottom - rect->top,
 305                    hdcMem, 0, 0,
 306                    SYSMETRICS_CXVSCROLL + 1, SYSMETRICS_CYHSCROLL + 1,
 307                    SRCCOPY );
 308     SelectObject( hdcMem, hbmpPrev );
 309     DeleteDC( hdcMem );
 310 }
 311
 312
 313 /***********************************************************************
 314  *           SCROLL_DrawMovingThumb
 315  *
 316  * Draw the moving thumb rectangle.
 317  */
 318 static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
 319                                     WORD arrowSize, WORD thumbPos )
 320 {
 321     RECT r = *rect;
 322     if (vertical)
 323     {
 324         r.top += thumbPos;
 325         if (r.top < rect->top + arrowSize) r.top = rect->top + arrowSize;
 326         if (r.top + SYSMETRICS_CYHSCROLL >= rect->bottom - arrowSize)
 327             r.top = rect->bottom - arrowSize - SYSMETRICS_CYHSCROLL - 1;
 328         r.bottom = r.top + SYSMETRICS_CYHSCROLL + 1;
 329     }
 330     else
 331     {
 332         r.left += thumbPos;
 333         if (r.left < rect->left + arrowSize) r.left = rect->left + arrowSize;
 334         if (r.left + SYSMETRICS_CXVSCROLL >= rect->right - arrowSize)
 335             r.left = rect->right - arrowSize - SYSMETRICS_CXVSCROLL - 1;
 336         r.right = r.left + SYSMETRICS_CXVSCROLL + 1;
 337     }
 338     InflateRect( &r, -1, -1 );
 339     DrawFocusRect( hdc, &r );
 340 }
 341
 342
 343 /***********************************************************************
 344  *           SCROLL_DrawInterior
 345  *
 346  * Draw the scroll bar interior (everything except the arrows).
 347  */
 348 static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, int nBar, RECT *rect,
 349                                  WORD arrowSize, WORD thumbPos, WORD flags,
 350                                  BOOL vertical, BOOL top_selected,
 351                                  BOOL bottom_selected )
 352 {
 353     RECT r;
 354
 355       /* Select the correct brush and pen */
 356
 357     SelectObject( hdc, sysColorObjects.hpenWindowFrame );
 358     if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
 359     {
 360           /* This ought to be the color of the parent window */
 361         SelectObject( hdc, sysColorObjects.hbrushWindow );
 362     }
 363     else
 364     {
 365         if (nBar == SB_CTL)  /* Only scrollbar controls send WM_CTLCOLOR */
 366         {
 367 #ifdef WINELIB32
 368             HBRUSH hbrush = SendMessage( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
 369                                          hdc, hwnd );
 370 #else
 371             HBRUSH hbrush = SendMessage( GetParent(hwnd), WM_CTLCOLOR, hdc,
 372                                          MAKELONG(hwnd, CTLCOLOR_SCROLLBAR) );
 373 #endif
 374             SelectObject( hdc, hbrush );
 375         }
 376         else SelectObject( hdc, sysColorObjects.hbrushScrollbar );
 377     }
 378
 379       /* Calculate the scroll rectangle */
 380
 381     r = *rect;
 382     if (vertical)
 383     {
 384         r.top    += arrowSize;
 385         r.bottom -= arrowSize;
 386     }
 387     else
 388     {
 389         r.left  += arrowSize;
 390         r.right -= arrowSize;
 391     }
 392
 393       /* Draw the scroll bar frame */
 394
 395     MoveTo( hdc, r.left, r.top );
 396     LineTo( hdc, r.right-1, r.top );
 397     LineTo( hdc, r.right-1, r.bottom-1 );
 398     LineTo( hdc, r.left, r.bottom-1 );
 399     LineTo( hdc, r.left, r.top );
 400
 401       /* Draw the scroll rectangles and thumb */
 402
 403     if (!thumbPos)  /* No thumb to draw */
 404     {
 405         PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
 406                 r.bottom - r.top - 2, PATCOPY );
 407         return;
 408     }
 409
 410     if (vertical)
 411     {
 412         PatBlt( hdc, r.left + 1, r.top + 1,
 413                 r.right - r.left - 2,
 414                 thumbPos - arrowSize,
 415                 top_selected ? 0x0f0000 : PATCOPY );
 416         r.top += thumbPos - arrowSize;
 417         PatBlt( hdc, r.left + 1, r.top + SYSMETRICS_CYHSCROLL + 1,
 418                 r.right - r.left - 2,
 419                 r.bottom - r.top - SYSMETRICS_CYHSCROLL - 2,
 420                 bottom_selected ? 0x0f0000 : PATCOPY );
 421         r.bottom = r.top + SYSMETRICS_CYHSCROLL + 1;
 422     }
 423     else  /* horizontal */
 424     {
 425         PatBlt( hdc, r.left + 1, r.top + 1,
 426                 thumbPos - arrowSize,
 427                 r.bottom - r.top - 2,
 428                 top_selected ? 0x0f0000 : PATCOPY );
 429         r.left += thumbPos - arrowSize;
 430         PatBlt( hdc, r.left + SYSMETRICS_CYHSCROLL + 1, r.top + 1,
 431                 r.right - r.left - SYSMETRICS_CYHSCROLL - 2,
 432                 r.bottom - r.top - 2,
 433                 bottom_selected ? 0x0f0000 : PATCOPY );
 434         r.right = r.left + SYSMETRICS_CXVSCROLL + 1;
 435     }
 436
 437       /* Draw the thumb */
 438
 439     SelectObject( hdc, sysColorObjects.hbrushBtnFace );
 440     Rectangle( hdc, r.left, r.top, r.right, r.bottom );
 441     InflateRect( &r, -1, -1 );
 442     GRAPH_DrawReliefRect( hdc, &r, 1, 2, FALSE );
 443     if ((hwndTracking == hwnd) && (nBarTracking == nBar))
 444         SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, uTrackingPos);
 445 }
 446
 447
 448 /***********************************************************************
 449  *           SCROLL_DrawScrollBar
 450  *
 451  * Redraw the whole scrollbar.
 452  */
 453 void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, int nBar )
 454 {
 455     WORD arrowSize, thumbPos;
 456     RECT rect;
 457     BOOL vertical;
 458     WND *wndPtr = WIN_FindWndPtr( hwnd );
 459     SCROLLINFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 460
 461     if (!wndPtr || !infoPtr ||
 462         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 463         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
 464
 465     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 466                                         &arrowSize, &thumbPos );
 467       /* Draw the arrows */
 468
 469     if (arrowSize) SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize,
 470                                       vertical, FALSE, FALSE );
 471
 472     SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
 473                          infoPtr->flags, vertical, FALSE, FALSE );
 474 }
 475
 476
 477 /***********************************************************************
 478  *           SCROLL_RefreshScrollBar
 479  *
 480  * Repaint the scroll bar interior after a SetScrollRange() or
 481  * SetScrollPos() call.
 482  */
 483 static void SCROLL_RefreshScrollBar( HWND hwnd, int nBar )
 484 {
 485     WORD arrowSize, thumbPos;
 486     RECT rect;
 487     BOOL vertical;
 488     HDC hdc;
 489     WND *wndPtr = WIN_FindWndPtr( hwnd );
 490     SCROLLINFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
 491
 492     if (!wndPtr || !infoPtr ||
 493         ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
 494         ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return;
 495
 496     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 497                                         &arrowSize, &thumbPos );
 498     hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
 499     if (!hdc) return;
 500     SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
 501                          infoPtr->flags, vertical, FALSE, FALSE );
 502     ReleaseDC( hwnd, hdc );
 503 }
 504
 505
 506 /***********************************************************************
 507  *           SCROLL_HandleKbdEvent
 508  *
 509  * Handle a keyboard event (only for SB_CTL scrollbars).
 510  */
 511 static void SCROLL_HandleKbdEvent( HWND hwnd, WORD wParam )
 512 {
 513     WND *wndPtr = WIN_FindWndPtr( hwnd );
 514     WPARAM msg;
 515
 516     switch(wParam)
 517     {
 518     case VK_PRIOR: msg = SB_PAGEUP; break;
 519     case VK_NEXT:  msg = SB_PAGEDOWN; break;
 520     case VK_HOME:  msg = SB_TOP; break;
 521     case VK_END:   msg = SB_BOTTOM; break;
 522     case VK_UP:    msg = SB_LINEUP; break;
 523     case VK_DOWN:  msg = SB_LINEDOWN; break;
 524     default:
 525         return;
 526     }
 527 #ifdef WINELIB32
 528     SendMessage( GetParent(hwnd),
 529                  (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 530                  msg, hwnd );
 531 #else
 532     SendMessage( GetParent(hwnd),
 533                  (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
 534                  msg, MAKELONG( 0, hwnd ));
 535 #endif
 536 }
 537
 538
 539 /***********************************************************************
 540  *           SCROLL_HandleScrollEvent
 541  *
 542  * Handle a mouse or timer event for the scrollbar.
 543  * 'pt' is the location of the mouse event in client (for SB_CTL) or
 544  * windows coordinates.
 545  */
 546 void SCROLL_HandleScrollEvent( HWND hwnd, int nBar, WORD msg, POINT pt )
 547 {
 548       /* Previous mouse position for timer events */
 549     static POINT prevPt;
 550       /* Hit test code of the last button-down event */
 551     static enum SCROLL_HITTEST trackHitTest;
 552       /* Thumb position when tracking started. */
 553     static UINT trackThumbPos;
 554       /* Position in the scroll-bar of the last button-down event. */
 555     static int lastClickPos;
 556       /* Position in the scroll-bar of the last mouse event. */
 557     static int lastMousePos;
 558
 559     enum SCROLL_HITTEST hittest;
 560     HWND hwndOwner, hwndCtl;
 561     BOOL vertical;
 562     WORD arrowSize, thumbPos;
 563     RECT rect;
 564     HDC hdc;
 565
 566     SCROLLINFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
 567     if (!infoPtr) return;
 568     if ((trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN)) return;
 569
 570     hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
 571     vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
 572                                         &arrowSize, &thumbPos );
 573     hwndOwner = (nBar == SB_CTL) ? GetParent(hwnd) : hwnd;
 574     hwndCtl   = (nBar == SB_CTL) ? hwnd : 0;
 575
 576     switch(msg)
 577     {
 578       case WM_LBUTTONDOWN:  /* Initialise mouse tracking */
 579           trackHitTest  = hittest = SCROLL_HitTest( hwnd, nBar, pt );
 580           lastClickPos  = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 581           lastMousePos  = lastClickPos;
 582           trackThumbPos = thumbPos;
 583           prevPt = pt;
 584           SetCapture( hwnd );
 585           if (nBar == SB_CTL) SetFocus( hwnd );
 586           break;
 587
 588       case WM_MOUSEMOVE:
 589           hittest = SCROLL_HitTest( hwnd, nBar, pt );
 590           prevPt = pt;
 591           break;
 592
 593       case WM_LBUTTONUP:
 594           hittest = SCROLL_NOWHERE;
 595           ReleaseCapture();
 596           break;
 597
 598       case WM_SYSTIMER:
 599           pt = prevPt;
 600           hittest = SCROLL_HitTest( hwnd, nBar, pt );
 601           break;
 602
 603       default:
 604           return;  /* Should never happen */
 605     }
 606
 607     dprintf_scroll( stddeb, "ScrollBar Event: hwnd=%04x bar=%d msg=%x pt=%d,%d hit=%d\n",
 608                     hwnd, nBar, msg, pt.x, pt.y, hittest );
 609
 610     switch(trackHitTest)
 611     {
 612     case SCROLL_NOWHERE:  /* No tracking in progress */
 613         break;
 614
 615     case SCROLL_TOP_ARROW:
 616         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 617                            (hittest == trackHitTest), FALSE );
 618         if (hittest == trackHitTest)
 619         {
 620             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 621             {
 622 #ifdef WINELIB32
 623                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 624                              SB_LINEUP, hwndCtl );
 625 #else
 626                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 627                              SB_LINEUP, MAKELONG( 0, hwndCtl ));
 628 #endif
 629                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 630                                 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 631                                 (FARPROC)0 );
 632             }
 633         }
 634         else KillSystemTimer( hwnd, SCROLL_TIMER );
 635         break;
 636
 637     case SCROLL_TOP_RECT:
 638         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
 639                              infoPtr->flags, vertical,
 640                              (hittest == trackHitTest), FALSE );
 641         if (hittest == trackHitTest)
 642         {
 643             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 644             {
 645 #ifdef WINELIB32
 646                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 647                              SB_PAGEUP, hwndCtl );
 648 #else
 649                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 650                              SB_PAGEUP, MAKELONG( 0, hwndCtl ));
 651 #endif
 652                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 653                                 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 654                                 (FARPROC)0 );
 655             }
 656         }
 657         else KillSystemTimer( hwnd, SCROLL_TIMER );
 658         break;
 659
 660     case SCROLL_THUMB:
 661         if (msg == WM_LBUTTONDOWN)
 662         {
 663             SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
 664                                  trackThumbPos + lastMousePos - lastClickPos );
 665             hwndTracking = hwnd;
 666             nBarTracking = nBar;
 667         }
 668         else if (msg == WM_LBUTTONUP)
 669         {
 670             hwndTracking = 0;
 671             SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
 672                                  infoPtr->flags, vertical, FALSE, FALSE );
 673         }
 674         else  /* WM_MOUSEMOVE */
 675         {
 676             UINT pos, val;
 677
 678             if (!PtInRect( &rect, pt )) pos = lastClickPos;
 679             else pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left);
 680             if (pos != lastMousePos)
 681             {
 682                 SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize,
 683                                  trackThumbPos + lastMousePos - lastClickPos );
 684                 lastMousePos = pos;
 685                 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
 686                                  trackThumbPos + lastMousePos - lastClickPos );
 687                 /* Save tracking info */
 688                 uTrackingPos = trackThumbPos + pos - lastClickPos;
 689 #ifdef WINELIB32
 690                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 691                              MAKEWPARAM(SB_THUMBTRACK,val), hwndCtl );
 692 #else
 693                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 694                              SB_THUMBTRACK, MAKELONG( val, hwndCtl ));
 695 #endif
 696                 SCROLL_DrawMovingThumb( hdc, &rect, vertical,
 697                                         arrowSize, uTrackingPos );
 698             }
 699         }
 700         break;
 701
 702     case SCROLL_BOTTOM_RECT:
 703         SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbPos,
 704                              infoPtr->flags, vertical,
 705                              FALSE, (hittest == trackHitTest) );
 706         if (hittest == trackHitTest)
 707         {
 708             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 709             {
 710 #ifdef WINELIB32
 711                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 712                              SB_PAGEDOWN, hwndCtl );
 713 #else
 714                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 715                              SB_PAGEDOWN, MAKELONG( 0, hwndCtl ));
 716 #endif
 717                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 718                                 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 719                                 (FARPROC)0 );
 720             }
 721         }
 722         else KillSystemTimer( hwnd, SCROLL_TIMER );
 723         break;
 724
 725     case SCROLL_BOTTOM_ARROW:
 726         SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical,
 727                            FALSE, (hittest == trackHitTest) );
 728         if (hittest == trackHitTest)
 729         {
 730             if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER))
 731             {
 732 #ifdef WINELIB32
 733                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 734                              SB_LINEDOWN, hwndCtl );
 735 #else
 736                 SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 737                              SB_LINEDOWN, MAKELONG( 0, hwndCtl ));
 738 #endif
 739                 SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
 740                                 SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
 741                                 (FARPROC)0 );
 742             }
 743         }
 744         else KillSystemTimer( hwnd, SCROLL_TIMER );
 745         break;
 746     }
 747
 748     if (msg == WM_LBUTTONUP)
 749     {
 750         if (trackHitTest == SCROLL_THUMB)
 751         {
 752             UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
 753                                  trackThumbPos + lastMousePos - lastClickPos );
 754 #ifdef WINELIB32
 755             SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 756                          MAKEWPARAM(SB_THUMBPOSITION,val), hwndCtl );
 757 #else
 758             SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 759                          SB_THUMBPOSITION, MAKELONG( val, hwndCtl ) );
 760 #endif
 761         }
 762         else
 763 #ifdef WINELIB32
 764             SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 765                          SB_ENDSCROLL, hwndCtl );
 766 #else
 767             SendMessage( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
 768                          SB_ENDSCROLL, MAKELONG( 0, hwndCtl ) );
 769 #endif
 770         trackHitTest = SCROLL_NOWHERE;  /* Terminate tracking */
 771     }
 772
 773     ReleaseDC( hwnd, hdc );
 774 }
 775
 776
 777 /***********************************************************************
 778  *           ScrollBarWndProc
 779  */
 780 LONG ScrollBarWndProc( HWND hwnd, WORD message, WORD wParam, LONG lParam )
 781 {
 782     POINT Pt;
 783     Pt.x = LOWORD(lParam); Pt.y = HIWORD(lParam);
 784     /* ^ Can't use MAKEPOINT macro in WINELIB32 */
 785
 786     switch(message)
 787     {
 788     case WM_CREATE:
 789         {
 790             CREATESTRUCT *lpCreat = (CREATESTRUCT *)PTR_SEG_TO_LIN(lParam);
 791             if (lpCreat->style & SBS_SIZEBOX)
 792             {
 793                 fprintf( stdnimp, "Unimplemented style SBS_SIZEBOX.\n" );
 794                 return 0;  /* FIXME */
 795             }
 796
 797             if (lpCreat->style & SBS_VERT)
 798             {
 799                 if (lpCreat->style & SBS_LEFTALIGN)
 800                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
 801                                 SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE );
 802                 else if (lpCreat->style & SBS_RIGHTALIGN)
 803                     MoveWindow( hwnd,
 804                                 lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1,
 805                                 lpCreat->y,
 806                                 SYSMETRICS_CXVSCROLL + 1, lpCreat->cy, FALSE );
 807             }
 808             else  /* SBS_HORZ */
 809             {
 810                 if (lpCreat->style & SBS_TOPALIGN)
 811                     MoveWindow( hwnd, lpCreat->x, lpCreat->y,
 812                                 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
 813                 else if (lpCreat->style & SBS_BOTTOMALIGN)
 814                     MoveWindow( hwnd,
 815                                 lpCreat->x,
 816                                 lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1,
 817                                 lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE );
 818             }
 819         }
 820         if (!hUpArrow) SCROLL_LoadBitmaps();
 821         dprintf_scroll( stddeb, "ScrollBar creation, hwnd=%04x\n", hwnd );
 822         return 0;
 823
 824     case WM_LBUTTONDOWN:
 825     case WM_LBUTTONUP:
 826     case WM_MOUSEMOVE:
 827     case WM_SYSTIMER:
 828         SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, Pt );
 829         break;
 830
 831     case WM_KEYDOWN:
 832         SCROLL_HandleKbdEvent( hwnd, wParam );
 833         break;
 834
 835     case WM_ERASEBKGND:
 836          return 1;
 837
 838     case WM_GETDLGCODE:
 839          return DLGC_WANTARROWS; /* Windows returns this value */
 840
 841     case WM_PAINT:
 842         {
 843             PAINTSTRUCT ps;
 844             HDC hdc = BeginPaint( hwnd, &ps );
 845             SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL );
 846             EndPaint( hwnd, &ps );
 847         }
 848         break;
 849
 850     case 0x400: /* SB_SETSCROLLPOS */
 851     case 0x401: /* SB_GETSCROLLPOS */
 852     case 0x402: /* SB_GETSCROLLRANGE */
 853     case 0x403: /* SB_ENABLE */
 854     case 0x404: /* SB_REDRAW */
 855         fprintf(stdnimp,"ScrollBarWndProc: undocumented message %04x, please report\n", message );
 856
 857     default:
 858         return DefWindowProc( hwnd, message, wParam, lParam );
 859     }
 860     return 0;
 861 }
 862
 863
 864 /*************************************************************************
 865  *           SetScrollPos   (USER.62)
 866  */
 867 int SetScrollPos( HWND hwnd, int nBar, int nPos, BOOL bRedraw )
 868 {
 869     SCROLLINFO *infoPtr;
 870     INT oldPos;
 871
 872     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
 873
 874     dprintf_scroll( stddeb,"SetScrollPos min=%d max=%d pos=%d\n",
 875                     infoPtr->MinVal, infoPtr->MaxVal, nPos );
 876
 877     if (nPos < infoPtr->MinVal) nPos = infoPtr->MinVal;
 878     else if (nPos > infoPtr->MaxVal) nPos = infoPtr->MaxVal;
 879     oldPos = infoPtr->CurVal;
 880     infoPtr->CurVal = nPos;
 881     if (bRedraw) SCROLL_RefreshScrollBar( hwnd, nBar );
 882     return oldPos;
 883 }
 884
 885
 886 /*************************************************************************
 887  *           GetScrollPos   (USER.63)
 888  */
 889 int GetScrollPos( HWND hwnd, int nBar )
 890 {
 891     SCROLLINFO *infoPtr;
 892
 893     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
 894     return infoPtr->CurVal;
 895 }
 896
 897
 898 /*************************************************************************
 899  *           SetScrollRange   (USER.64)
 900  */
 901 void SetScrollRange(HWND hwnd, int nBar, int MinVal, int MaxVal, BOOL bRedraw)
 902 {
 903     SCROLLINFO *infoPtr;
 904
 905     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
 906
 907     dprintf_scroll( stddeb,"SetScrollRange hwnd=%04x bar=%d min=%d max=%d\n",
 908                     hwnd, nBar, MinVal, MaxVal );
 909
 910       /* Invalid range -> range is set to (0,0) */
 911     if ((MinVal > MaxVal) || ((long)MaxVal - MinVal > 32767L))
 912         MinVal = MaxVal = 0;
 913     if (infoPtr->CurVal < MinVal) infoPtr->CurVal = MinVal;
 914     else if (infoPtr->CurVal > MaxVal) infoPtr->CurVal = MaxVal;
 915     infoPtr->MinVal = MinVal;
 916     infoPtr->MaxVal = MaxVal;
 917
 918       /* Non-client scroll-bar is hidden if min==max */
 919     if (nBar != SB_CTL) ShowScrollBar( hwnd, nBar, (MinVal != MaxVal) );
 920     if (bRedraw) SCROLL_RefreshScrollBar( hwnd, nBar );
 921 }
 922
 923 /*************************************************************************
 924  *           SCROLL_SetNCSbState
 925  *
 926  * This is for CalcChildScroll in windows/mdi.c
 927  */
 928 DWORD SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
 929                                        int hMin, int hMax, int hPos)
 930 {
 931   SCROLLINFO  *infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_VERT);
 932
 933   wndPtr->dwStyle |= (WS_VSCROLL | WS_HSCROLL);
 934
 935   if( vMin >= vMax )
 936     { vMin = vMax;
 937       wndPtr->dwStyle &= ~WS_VSCROLL; }
 938   if( vPos > vMax ) vPos = vMax; else if( vPos < vMin ) vPos = vMin;
 939   infoPtr->MinVal = vMin;
 940   infoPtr->MaxVal = vMax;
 941   infoPtr->CurVal = vPos;
 942
 943   infoPtr = SCROLL_GetPtrScrollInfo(wndPtr, SB_HORZ);
 944
 945   if( hMin >= hMax )
 946     { hMin = hMax;
 947       wndPtr->dwStyle &= ~WS_HSCROLL; }
 948   if( hPos > hMax ) hPos = hMax; else if( hPos < hMin ) hPos = hMin;
 949   infoPtr->MinVal = hMin;
 950   infoPtr->MaxVal = hMax;
 951   infoPtr->CurVal = hPos;
 952
 953   return wndPtr->dwStyle & (WS_VSCROLL | WS_HSCROLL);
 954 }
 955
 956 /*************************************************************************
 957  *           GetScrollRange   (USER.65)
 958  */
 959 void GetScrollRange(HWND hwnd, int nBar, LPINT16 lpMin, LPINT16 lpMax)
 960 {
 961     SCROLLINFO *infoPtr;
 962
 963     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return;
 964     if (lpMin) *lpMin = infoPtr->MinVal;
 965     if (lpMax) *lpMax = infoPtr->MaxVal;
 966 }
 967
 968
 969 /*************************************************************************
 970  *           ShowScrollBar   (USER.267)
 971  */
 972 void ShowScrollBar( HWND hwnd, WORD wBar, BOOL fShow )
 973 {
 974     WND *wndPtr = WIN_FindWndPtr( hwnd );
 975
 976     if (!wndPtr) return;
 977     dprintf_scroll( stddeb, "ShowScrollBar: hwnd=%04x bar=%d on=%d\n", hwnd, wBar, fShow );
 978
 979     switch(wBar)
 980     {
 981     case SB_CTL:
 982         ShowWindow( hwnd, fShow ? SW_SHOW : SW_HIDE );
 983         return;
 984
 985     case SB_HORZ:
 986         if (fShow)
 987         {
 988             if (wndPtr->dwStyle & WS_HSCROLL) return;
 989             wndPtr->dwStyle |= WS_HSCROLL;
 990         }
 991         else  /* hide it */
 992         {
 993             if (!(wndPtr->dwStyle & WS_HSCROLL)) return;
 994             wndPtr->dwStyle &= ~WS_HSCROLL;
 995         }
 996         break;
 997
 998     case SB_VERT:
 999         if (fShow)
1000         {
1001             if (wndPtr->dwStyle & WS_VSCROLL) return;
1002             wndPtr->dwStyle |= WS_VSCROLL;
1003         }
1004         else  /* hide it */
1005         {
1006             if (!(wndPtr->dwStyle & WS_VSCROLL)) return;
1007             wndPtr->dwStyle &= ~WS_VSCROLL;
1008         }
1009         break;
1010
1011     case SB_BOTH:
1012         if (fShow)
1013         {
1014             if ((wndPtr->dwStyle & WS_HSCROLL)
1015                 && (wndPtr->dwStyle & WS_VSCROLL)) return;
1016             wndPtr->dwStyle |= WS_HSCROLL | WS_VSCROLL;
1017         }
1018         else  /* hide it */
1019         {
1020             if (!(wndPtr->dwStyle & WS_HSCROLL)
1021                 && !(wndPtr->dwStyle & WS_HSCROLL)) return;
1022             wndPtr->dwStyle &= ~(WS_HSCROLL | WS_VSCROLL);
1023         }
1024         break;
1025
1026     default:
1027         return;  /* Nothing to do! */
1028     }
1029     SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
1030                  | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
1031 }
1032
1033
1034 /*************************************************************************
1035  *           EnableScrollBar   (USER.482)
1036  */
1037 BOOL EnableScrollBar( HWND hwnd, UINT nBar, UINT flags )
1038 {
1039     SCROLLINFO *infoPtr;
1040     HDC hdc;
1041
1042     if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE;
1043     dprintf_scroll( stddeb, "EnableScrollBar: %04x %d %d\n", hwnd, nBar, flags );
1044     flags &= ESB_DISABLE_BOTH;
1045     if (infoPtr->flags == flags) return FALSE;
1046     infoPtr->flags = flags;
1047
1048       /* Redraw the whole scroll bar */
1049     hdc = (nBar == SB_CTL) ? GetDC(hwnd) : GetWindowDC(hwnd);
1050     SCROLL_DrawScrollBar( hwnd, hdc, nBar );
1051     ReleaseDC( hwnd, hdc );
1052     return TRUE;
1053 }