/* * Scrollbar control * * Copyright 1993 Martin Ayotte * Copyright 1994, 1996 Alexandre Julliard */ #include "wine/winuser16.h" #include "sysmetrics.h" #include "scroll.h" #include "heap.h" #include "win.h" #include "debug.h" static HBITMAP32 hUpArrow = 0; static HBITMAP32 hDnArrow = 0; static HBITMAP32 hLfArrow = 0; static HBITMAP32 hRgArrow = 0; static HBITMAP32 hUpArrowD = 0; static HBITMAP32 hDnArrowD = 0; static HBITMAP32 hLfArrowD = 0; static HBITMAP32 hRgArrowD = 0; static HBITMAP32 hUpArrowI = 0; static HBITMAP32 hDnArrowI = 0; static HBITMAP32 hLfArrowI = 0; static HBITMAP32 hRgArrowI = 0; #define TOP_ARROW(flags,pressed) \ (((flags)&ESB_DISABLE_UP) ? hUpArrowI : ((pressed) ? hUpArrowD:hUpArrow)) #define BOTTOM_ARROW(flags,pressed) \ (((flags)&ESB_DISABLE_DOWN) ? hDnArrowI : ((pressed) ? hDnArrowD:hDnArrow)) #define LEFT_ARROW(flags,pressed) \ (((flags)&ESB_DISABLE_LEFT) ? hLfArrowI : ((pressed) ? hLfArrowD:hLfArrow)) #define RIGHT_ARROW(flags,pressed) \ (((flags)&ESB_DISABLE_RIGHT) ? hRgArrowI : ((pressed) ? hRgArrowD:hRgArrow)) /* Minimum size of the rectangle between the arrows */ #define SCROLL_MIN_RECT 4 /* Minimum size of the thumb in pixels */ #define SCROLL_MIN_THUMB 6 /* Overlap between arrows and thumb */ #define SCROLL_ARROW_THUMB_OVERLAP 1 /* Delay (in ms) before first repetition when holding the button down */ #define SCROLL_FIRST_DELAY 200 /* Delay (in ms) between scroll repetitions */ #define SCROLL_REPEAT_DELAY 50 /* Scroll timer id */ #define SCROLL_TIMER 0 /* Scroll-bar hit testing */ enum SCROLL_HITTEST { SCROLL_NOWHERE, /* Outside the scroll bar */ SCROLL_TOP_ARROW, /* Top or left arrow */ SCROLL_TOP_RECT, /* Rectangle between the top arrow and the thumb */ SCROLL_THUMB, /* Thumb rectangle */ SCROLL_BOTTOM_RECT, /* Rectangle between the thumb and the bottom arrow */ SCROLL_BOTTOM_ARROW /* Bottom or right arrow */ }; /* What to do after SCROLL_SetScrollInfo() */ #define SA_SSI_HIDE 0x0001 #define SA_SSI_SHOW 0x0002 #define SA_SSI_REFRESH 0x0004 #define SA_SSI_REPAINT_ARROWS 0x0008 /* Thumb-tracking info */ static HWND32 SCROLL_TrackingWin = 0; static INT32 SCROLL_TrackingBar = 0; static INT32 SCROLL_TrackingPos = 0; static INT32 SCROLL_TrackingVal = 0; /* Hit test code of the last button-down event */ static enum SCROLL_HITTEST SCROLL_trackHitTest; static BOOL32 SCROLL_trackVertical; /* Is the moving thumb being displayed? */ static BOOL32 SCROLL_MovingThumb = FALSE; /* Local functions */ static BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar, BOOL32 fShowH, BOOL32 fShowV ); static INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar, const SCROLLINFO *info, INT32 *action ); /*********************************************************************** * SCROLL_LoadBitmaps */ static void SCROLL_LoadBitmaps(void) { hUpArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROW) ); hDnArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROW) ); hLfArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROW) ); hRgArrow = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROW) ); hUpArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWD) ); hDnArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWD) ); hLfArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWD) ); hRgArrowD = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWD) ); hUpArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_UPARROWI) ); hDnArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_DNARROWI) ); hLfArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_LFARROWI) ); hRgArrowI = LoadBitmap32A( 0, MAKEINTRESOURCE32A(OBM_RGARROWI) ); } /*********************************************************************** * SCROLL_GetPtrScrollInfo */ static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT32 nBar ) { SCROLLBAR_INFO *infoPtr; if (!wndPtr) return NULL; switch(nBar) { case SB_HORZ: infoPtr = (SCROLLBAR_INFO *)wndPtr->pHScroll; break; case SB_VERT: infoPtr = (SCROLLBAR_INFO *)wndPtr->pVScroll; break; case SB_CTL: infoPtr = (SCROLLBAR_INFO *)wndPtr->wExtra; break; default: return NULL; } if (!infoPtr) /* Create the info structure if needed */ { if ((infoPtr = HeapAlloc( SystemHeap, 0, sizeof(SCROLLBAR_INFO) ))) { infoPtr->MinVal = infoPtr->CurVal = infoPtr->Page = 0; infoPtr->MaxVal = 100; infoPtr->flags = ESB_ENABLE_BOTH; if (nBar == SB_HORZ) wndPtr->pHScroll = infoPtr; else wndPtr->pVScroll = infoPtr; } if (!hUpArrow) SCROLL_LoadBitmaps(); } return infoPtr; } /*********************************************************************** * SCROLL_GetScrollInfo */ static SCROLLBAR_INFO *SCROLL_GetScrollInfo( HWND32 hwnd, INT32 nBar ) { WND *wndPtr = WIN_FindWndPtr( hwnd ); return SCROLL_GetPtrScrollInfo( wndPtr, nBar ); } /*********************************************************************** * SCROLL_GetScrollBarRect * * Compute the scroll bar rectangle, in drawing coordinates (i.e. client * coords for SB_CTL, window coords for SB_VERT and SB_HORZ). * 'arrowSize' returns the width or height of an arrow (depending on * the orientation of the scrollbar), 'thumbSize' returns the size of * the thumb, and 'thumbPos' returns the position of the thumb * relative to the left or to the top. * Return TRUE if the scrollbar is vertical, FALSE if horizontal. */ static BOOL32 SCROLL_GetScrollBarRect( HWND32 hwnd, INT32 nBar, RECT32 *lprect, INT32 *arrowSize, INT32 *thumbSize, INT32 *thumbPos ) { INT32 pixels; BOOL32 vertical; WND *wndPtr = WIN_FindWndPtr( hwnd ); switch(nBar) { case SB_HORZ: lprect->left = wndPtr->rectClient.left - wndPtr->rectWindow.left; lprect->top = wndPtr->rectClient.bottom - wndPtr->rectWindow.top; lprect->right = wndPtr->rectClient.right - wndPtr->rectWindow.left; lprect->bottom = lprect->top + SYSMETRICS_CYHSCROLL; if(wndPtr->dwStyle & WS_BORDER) { lprect->left--; lprect->right++; } else if(wndPtr->dwStyle & WS_VSCROLL) lprect->right++; vertical = FALSE; break; case SB_VERT: lprect->left = wndPtr->rectClient.right - wndPtr->rectWindow.left; lprect->top = wndPtr->rectClient.top - wndPtr->rectWindow.top; lprect->right = lprect->left + SYSMETRICS_CXVSCROLL; lprect->bottom = wndPtr->rectClient.bottom - wndPtr->rectWindow.top; if(wndPtr->dwStyle & WS_BORDER) { lprect->top--; lprect->bottom++; } else if(wndPtr->dwStyle & WS_HSCROLL) lprect->bottom++; vertical = TRUE; break; case SB_CTL: GetClientRect32( hwnd, lprect ); vertical = ((wndPtr->dwStyle & SBS_VERT) != 0); break; default: return FALSE; } if (vertical) pixels = lprect->bottom - lprect->top; else pixels = lprect->right - lprect->left; if (pixels <= 2*SYSMETRICS_CXVSCROLL + SCROLL_MIN_RECT) { if (pixels > SCROLL_MIN_RECT) *arrowSize = (pixels - SCROLL_MIN_RECT) / 2; else *arrowSize = 0; *thumbPos = *thumbSize = 0; } else { SCROLLBAR_INFO *info = SCROLL_GetPtrScrollInfo( wndPtr, nBar ); *arrowSize = SYSMETRICS_CXVSCROLL; pixels -= (2 * (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)); if (info->Page) { *thumbSize = pixels * info->Page / (info->MaxVal-info->MinVal+1); if (*thumbSize < SCROLL_MIN_THUMB) *thumbSize = SCROLL_MIN_THUMB; } else *thumbSize = SYSMETRICS_CXVSCROLL; if (((pixels -= *thumbSize ) < 0) || ((info->flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)) { /* Rectangle too small or scrollbar disabled -> no thumb */ *thumbPos = *thumbSize = 0; } else { INT32 max = info->MaxVal - MAX( info->Page-1, 0 ); if (info->MinVal >= max) *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP; else *thumbPos = *arrowSize - SCROLL_ARROW_THUMB_OVERLAP + pixels * (info->CurVal-info->MinVal) / (max - info->MinVal); } } return vertical; } /*********************************************************************** * SCROLL_GetThumbVal * * Compute the current scroll position based on the thumb position in pixels * from the top of the scroll-bar. */ static UINT32 SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT32 *rect, BOOL32 vertical, INT32 pos ) { INT32 thumbSize; INT32 pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left; if ((pixels -= 2*(SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP)) <= 0) return infoPtr->MinVal; if (infoPtr->Page) { thumbSize = pixels * infoPtr->Page/(infoPtr->MaxVal-infoPtr->MinVal+1); if (thumbSize < SCROLL_MIN_THUMB) thumbSize = SCROLL_MIN_THUMB; } else thumbSize = SYSMETRICS_CXVSCROLL; if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal; pos = MAX( 0, pos - (SYSMETRICS_CXVSCROLL - SCROLL_ARROW_THUMB_OVERLAP) ); if (pos > pixels) pos = pixels; if (!infoPtr->Page) pos *= infoPtr->MaxVal - infoPtr->MinVal; else pos *= infoPtr->MaxVal - infoPtr->MinVal - infoPtr->Page + 1; return infoPtr->MinVal + ((pos + pixels / 2) / pixels); } /*********************************************************************** * SCROLL_PtInRectEx */ static BOOL32 SCROLL_PtInRectEx( LPRECT32 lpRect, POINT32 pt, BOOL32 vertical ) { RECT32 rect = *lpRect; if (vertical) { rect.left -= lpRect->right - lpRect->left; rect.right += lpRect->right - lpRect->left; } else { rect.top -= lpRect->bottom - lpRect->top; rect.bottom += lpRect->bottom - lpRect->top; } return PtInRect32( &rect, pt ); } /*********************************************************************** * SCROLL_ClipPos */ static POINT32 SCROLL_ClipPos( LPRECT32 lpRect, POINT32 pt ) { if( pt.x < lpRect->left ) pt.x = lpRect->left; else if( pt.x > lpRect->right ) pt.x = lpRect->right; if( pt.y < lpRect->top ) pt.y = lpRect->top; else if( pt.y > lpRect->bottom ) pt.y = lpRect->bottom; return pt; } /*********************************************************************** * SCROLL_HitTest * * Scroll-bar hit testing (don't confuse this with WM_NCHITTEST!). */ static enum SCROLL_HITTEST SCROLL_HitTest( HWND32 hwnd, INT32 nBar, POINT32 pt, BOOL32 bDragging ) { INT32 arrowSize, thumbSize, thumbPos; RECT32 rect; BOOL32 vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect, &arrowSize, &thumbSize, &thumbPos ); if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) || (!PtInRect32( &rect, pt )) ) return SCROLL_NOWHERE; if (vertical) { if (pt.y < rect.top + arrowSize) return SCROLL_TOP_ARROW; if (pt.y >= rect.bottom - arrowSize) return SCROLL_BOTTOM_ARROW; if (!thumbPos) return SCROLL_TOP_RECT; pt.y -= rect.top; if (pt.y < thumbPos) return SCROLL_TOP_RECT; if (pt.y >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT; } else /* horizontal */ { if (pt.x < rect.left + arrowSize) return SCROLL_TOP_ARROW; if (pt.x >= rect.right - arrowSize) return SCROLL_BOTTOM_ARROW; if (!thumbPos) return SCROLL_TOP_RECT; pt.x -= rect.left; if (pt.x < thumbPos) return SCROLL_TOP_RECT; if (pt.x >= thumbPos + thumbSize) return SCROLL_BOTTOM_RECT; } return SCROLL_THUMB; } /*********************************************************************** * SCROLL_DrawArrows * * Draw the scroll bar arrows. */ static void SCROLL_DrawArrows( HDC32 hdc, SCROLLBAR_INFO *infoPtr, RECT32 *rect, INT32 arrowSize, BOOL32 vertical, BOOL32 top_pressed, BOOL32 bottom_pressed ) { HDC32 hdcMem = CreateCompatibleDC32( hdc ); HBITMAP32 hbmpPrev = SelectObject32( hdcMem, vertical ? TOP_ARROW(infoPtr->flags, top_pressed) : LEFT_ARROW(infoPtr->flags, top_pressed)); SetStretchBltMode32( hdc, STRETCH_DELETESCANS ); StretchBlt32( hdc, rect->left, rect->top, vertical ? rect->right-rect->left : arrowSize, vertical ? arrowSize : rect->bottom-rect->top, hdcMem, 0, 0, SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL, SRCCOPY ); SelectObject32( hdcMem, vertical ? BOTTOM_ARROW( infoPtr->flags, bottom_pressed ) : RIGHT_ARROW( infoPtr->flags, bottom_pressed ) ); if (vertical) StretchBlt32( hdc, rect->left, rect->bottom - arrowSize, rect->right - rect->left, arrowSize, hdcMem, 0, 0, SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL, SRCCOPY ); else StretchBlt32( hdc, rect->right - arrowSize, rect->top, arrowSize, rect->bottom - rect->top, hdcMem, 0, 0, SYSMETRICS_CXVSCROLL, SYSMETRICS_CYHSCROLL, SRCCOPY ); SelectObject32( hdcMem, hbmpPrev ); DeleteDC32( hdcMem ); } /*********************************************************************** * SCROLL_DrawMovingThumb * * Draw the moving thumb rectangle. */ static void SCROLL_DrawMovingThumb( HDC32 hdc, RECT32 *rect, BOOL32 vertical, INT32 arrowSize, INT32 thumbSize ) { RECT32 r = *rect; if (vertical) { r.top += SCROLL_TrackingPos; if (r.top < rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP) r.top = rect->top + arrowSize - SCROLL_ARROW_THUMB_OVERLAP; if (r.top + thumbSize > rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)) r.top = rect->bottom - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - thumbSize; r.bottom = r.top + thumbSize; } else { r.left += SCROLL_TrackingPos; if (r.left < rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP) r.left = rect->left + arrowSize - SCROLL_ARROW_THUMB_OVERLAP; if (r.left + thumbSize > rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP)) r.left = rect->right - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - thumbSize; r.right = r.left + thumbSize; } DrawFocusRect32( hdc, &r ); SCROLL_MovingThumb = !SCROLL_MovingThumb; } /*********************************************************************** * SCROLL_DrawInterior * * Draw the scroll bar interior (everything except the arrows). */ static void SCROLL_DrawInterior( HWND32 hwnd, HDC32 hdc, INT32 nBar, RECT32 *rect, INT32 arrowSize, INT32 thumbSize, INT32 thumbPos, UINT32 flags, BOOL32 vertical, BOOL32 top_selected, BOOL32 bottom_selected ) { RECT32 r; /* Select the correct brush and pen */ SelectObject32( hdc, GetSysColorPen32(COLOR_WINDOWFRAME) ); if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH) { /* This ought to be the color of the parent window */ SelectObject32( hdc, GetSysColorBrush32(COLOR_WINDOW) ); } else { if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */ { HBRUSH32 hbrush = SendMessage32A(GetParent32(hwnd), WM_CTLCOLORSCROLLBAR, hdc, hwnd ); SelectObject32( hdc, hbrush ); } else SelectObject32( hdc, GetSysColorBrush32(COLOR_SCROLLBAR) ); } /* Calculate the scroll rectangle */ r = *rect; if (vertical) { r.top += arrowSize - SCROLL_ARROW_THUMB_OVERLAP; r.bottom -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP); } else { r.left += arrowSize - SCROLL_ARROW_THUMB_OVERLAP; r.right -= (arrowSize - SCROLL_ARROW_THUMB_OVERLAP); } /* Draw the scroll bar frame */ Rectangle32( hdc, r.left, r.top, r.right, r.bottom ); /* Draw the scroll rectangles and thumb */ if (!thumbPos) /* No thumb to draw */ { PatBlt32( hdc, r.left+1, r.top+1, r.right - r.left - 2, r.bottom - r.top - 2, PATCOPY ); return; } if (vertical) { PatBlt32( hdc, r.left + 1, r.top + 1, r.right - r.left - 2, thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1, top_selected ? 0x0f0000 : PATCOPY ); r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP); PatBlt32( hdc, r.left + 1, r.top + thumbSize, r.right - r.left - 2, r.bottom - r.top - thumbSize - 1, bottom_selected ? 0x0f0000 : PATCOPY ); r.bottom = r.top + thumbSize; } else /* horizontal */ { PatBlt32( hdc, r.left + 1, r.top + 1, thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - 1, r.bottom - r.top - 2, top_selected ? 0x0f0000 : PATCOPY ); r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP); PatBlt32( hdc, r.left + thumbSize, r.top + 1, r.right - r.left - thumbSize - 1, r.bottom - r.top - 2, bottom_selected ? 0x0f0000 : PATCOPY ); r.right = r.left + thumbSize; } /* Draw the thumb */ SelectObject32( hdc, GetSysColorBrush32(COLOR_BTNFACE) ); Rectangle32( hdc, r.left, r.top, r.right, r.bottom ); r.top++, r.left++; DrawEdge32( hdc, &r, EDGE_RAISED, BF_RECT ); if (SCROLL_MovingThumb && (SCROLL_TrackingWin == hwnd) && (SCROLL_TrackingBar == nBar)) { SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize ); SCROLL_MovingThumb = TRUE; } } /*********************************************************************** * SCROLL_DrawScrollBar * * Redraw the whole scrollbar. */ void SCROLL_DrawScrollBar( HWND32 hwnd, HDC32 hdc, INT32 nBar, BOOL32 arrows, BOOL32 interior ) { INT32 arrowSize, thumbSize, thumbPos; RECT32 rect; BOOL32 vertical; WND *wndPtr = WIN_FindWndPtr( hwnd ); SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar ); if (!wndPtr || !infoPtr || ((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) || ((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) return; if (!WIN_IsWindowDrawable( wndPtr, FALSE )) return; vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect, &arrowSize, &thumbSize, &thumbPos ); /* Draw the arrows */ if (arrows && arrowSize) { if( vertical == SCROLL_trackVertical && GetCapture32() == hwnd ) SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical, (SCROLL_trackHitTest == SCROLL_TOP_ARROW), (SCROLL_trackHitTest == SCROLL_BOTTOM_ARROW) ); else SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical, FALSE, FALSE ); } if( interior ) SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize, thumbPos, infoPtr->flags, vertical, FALSE, FALSE ); } /*********************************************************************** * SCROLL_RefreshScrollBar * * Repaint the scroll bar interior after a SetScrollRange() or * SetScrollPos() call. */ static void SCROLL_RefreshScrollBar( HWND32 hwnd, INT32 nBar, BOOL32 arrows, BOOL32 interior ) { HDC32 hdc = GetDCEx32( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) ); if (!hdc) return; SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior ); ReleaseDC32( hwnd, hdc ); } /*********************************************************************** * SCROLL_HandleKbdEvent * * Handle a keyboard event (only for SB_CTL scrollbars). */ static void SCROLL_HandleKbdEvent( HWND32 hwnd, WPARAM32 wParam ) { WND *wndPtr = WIN_FindWndPtr( hwnd ); WPARAM32 msg; switch(wParam) { case VK_PRIOR: msg = SB_PAGEUP; break; case VK_NEXT: msg = SB_PAGEDOWN; break; case VK_HOME: msg = SB_TOP; break; case VK_END: msg = SB_BOTTOM; break; case VK_UP: msg = SB_LINEUP; break; case VK_DOWN: msg = SB_LINEDOWN; break; default: return; } SendMessage32A( GetParent32(hwnd), (wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL, msg, hwnd ); } /*********************************************************************** * SCROLL_HandleScrollEvent * * Handle a mouse or timer event for the scrollbar. * 'pt' is the location of the mouse event in client (for SB_CTL) or * windows coordinates. */ void SCROLL_HandleScrollEvent( HWND32 hwnd, INT32 nBar, UINT32 msg, POINT32 pt) { /* Previous mouse position for timer events */ static POINT32 prevPt; /* Thumb position when tracking started. */ static UINT32 trackThumbPos; /* Position in the scroll-bar of the last button-down event. */ static INT32 lastClickPos; /* Position in the scroll-bar of the last mouse event. */ static INT32 lastMousePos; enum SCROLL_HITTEST hittest; HWND32 hwndOwner, hwndCtl; BOOL32 vertical; INT32 arrowSize, thumbSize, thumbPos; RECT32 rect; HDC32 hdc; SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ); if (!infoPtr) return; if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN)) return; hdc = GetDCEx32( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW)); vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect, &arrowSize, &thumbSize, &thumbPos ); hwndOwner = (nBar == SB_CTL) ? GetParent32(hwnd) : hwnd; hwndCtl = (nBar == SB_CTL) ? hwnd : 0; switch(msg) { case WM_LBUTTONDOWN: /* Initialise mouse tracking */ SCROLL_trackVertical = vertical; SCROLL_trackHitTest = hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE ); lastClickPos = vertical ? (pt.y - rect.top) : (pt.x - rect.left); lastMousePos = lastClickPos; trackThumbPos = thumbPos; prevPt = pt; SetCapture32( hwnd ); if (nBar == SB_CTL) SetFocus32( hwnd ); break; case WM_MOUSEMOVE: hittest = SCROLL_HitTest( hwnd, nBar, pt, TRUE ); prevPt = pt; break; case WM_LBUTTONUP: hittest = SCROLL_NOWHERE; ReleaseCapture(); break; case WM_SYSTIMER: pt = prevPt; hittest = SCROLL_HitTest( hwnd, nBar, pt, FALSE ); break; default: return; /* Should never happen */ } TRACE(scroll, "Event: hwnd=%04x bar=%d msg=%x pt=%ld,%ld hit=%d\n", hwnd, nBar, msg, pt.x, pt.y, hittest ); switch(SCROLL_trackHitTest) { case SCROLL_NOWHERE: /* No tracking in progress */ break; case SCROLL_TOP_ARROW: SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical, (hittest == SCROLL_trackHitTest), FALSE ); if (hittest == SCROLL_trackHitTest) { if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER)) { SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, SB_LINEUP, hwndCtl ); SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ? SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, (TIMERPROC32)0 ); } } else KillSystemTimer32( hwnd, SCROLL_TIMER ); break; case SCROLL_TOP_RECT: SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize, thumbPos, infoPtr->flags, vertical, (hittest == SCROLL_trackHitTest), FALSE ); if (hittest == SCROLL_trackHitTest) { if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER)) { SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, SB_PAGEUP, hwndCtl ); SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ? SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, (TIMERPROC32)0 ); } } else KillSystemTimer32( hwnd, SCROLL_TIMER ); break; case SCROLL_THUMB: if (msg == WM_LBUTTONDOWN) { SCROLL_TrackingWin = hwnd; SCROLL_TrackingBar = nBar; SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos; SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize); } else if (msg == WM_LBUTTONUP) { SCROLL_TrackingWin = 0; SCROLL_MovingThumb = FALSE; SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize, thumbPos, infoPtr->flags, vertical, FALSE, FALSE ); } else /* WM_MOUSEMOVE */ { UINT32 pos; if (!SCROLL_PtInRectEx( &rect, pt, vertical )) pos = lastClickPos; else { pt = SCROLL_ClipPos( &rect, pt ); pos = vertical ? (pt.y - rect.top) : (pt.x - rect.left); } if (pos != lastMousePos) { SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize ); lastMousePos = pos; SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos; SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect, vertical, SCROLL_TrackingPos ); SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal), hwndCtl ); SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize ); } } break; case SCROLL_BOTTOM_RECT: SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize, thumbPos, infoPtr->flags, vertical, FALSE, (hittest == SCROLL_trackHitTest) ); if (hittest == SCROLL_trackHitTest) { if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER)) { SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, SB_PAGEDOWN, hwndCtl ); SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ? SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, (TIMERPROC32)0 ); } } else KillSystemTimer32( hwnd, SCROLL_TIMER ); break; case SCROLL_BOTTOM_ARROW: SCROLL_DrawArrows( hdc, infoPtr, &rect, arrowSize, vertical, FALSE, (hittest == SCROLL_trackHitTest) ); if (hittest == SCROLL_trackHitTest) { if ((msg == WM_LBUTTONDOWN) || (msg == WM_SYSTIMER)) { SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, SB_LINEDOWN, hwndCtl ); SetSystemTimer32( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ? SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY, (TIMERPROC32)0 ); } } else KillSystemTimer32( hwnd, SCROLL_TIMER ); break; } if (msg == WM_LBUTTONUP) { hittest = SCROLL_trackHitTest; SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */ if (hittest == SCROLL_THUMB) { UINT32 val = SCROLL_GetThumbVal( infoPtr, &rect, vertical, trackThumbPos + lastMousePos - lastClickPos ); SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl ); } else SendMessage32A( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL, SB_ENDSCROLL, hwndCtl ); } ReleaseDC32( hwnd, hdc ); } /*********************************************************************** * ScrollBarWndProc */ LRESULT WINAPI ScrollBarWndProc( HWND32 hwnd, UINT32 message, WPARAM32 wParam, LPARAM lParam ) { switch(message) { case WM_CREATE: { CREATESTRUCT32A *lpCreat = (CREATESTRUCT32A *)lParam; if (lpCreat->style & SBS_SIZEBOX) { FIXME(scroll, "Unimplemented style SBS_SIZEBOX.\n" ); return 0; } if (lpCreat->style & SBS_VERT) { if (lpCreat->style & SBS_LEFTALIGN) MoveWindow32( hwnd, lpCreat->x, lpCreat->y, SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE ); else if (lpCreat->style & SBS_RIGHTALIGN) MoveWindow32( hwnd, lpCreat->x+lpCreat->cx-SYSMETRICS_CXVSCROLL-1, lpCreat->y, SYSMETRICS_CXVSCROLL+1, lpCreat->cy, FALSE ); } else /* SBS_HORZ */ { if (lpCreat->style & SBS_TOPALIGN) MoveWindow32( hwnd, lpCreat->x, lpCreat->y, lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE ); else if (lpCreat->style & SBS_BOTTOMALIGN) MoveWindow32( hwnd, lpCreat->x, lpCreat->y+lpCreat->cy-SYSMETRICS_CYHSCROLL-1, lpCreat->cx, SYSMETRICS_CYHSCROLL+1, FALSE ); } } if (!hUpArrow) SCROLL_LoadBitmaps(); TRACE(scroll, "ScrollBar creation, hwnd=%04x\n", hwnd ); return 0; case WM_LBUTTONDOWN: case WM_LBUTTONUP: case WM_MOUSEMOVE: case WM_SYSTIMER: { POINT32 pt; CONV_POINT16TO32( (POINT16 *)&lParam, &pt ); SCROLL_HandleScrollEvent( hwnd, SB_CTL, message, pt ); } break; case WM_KEYDOWN: SCROLL_HandleKbdEvent( hwnd, wParam ); break; case WM_ERASEBKGND: return 1; case WM_GETDLGCODE: return DLGC_WANTARROWS; /* Windows returns this value */ case WM_PAINT: { PAINTSTRUCT32 ps; HDC32 hdc = BeginPaint32( hwnd, &ps ); SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE ); EndPaint32( hwnd, &ps ); } break; case SBM_SETPOS16: case SBM_SETPOS32: return SetScrollPos32( hwnd, SB_CTL, wParam, (BOOL32)lParam ); case SBM_GETPOS16: case SBM_GETPOS32: return GetScrollPos32( hwnd, SB_CTL ); case SBM_SETRANGE16: SetScrollRange32( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam), wParam /* FIXME: Is this correct? */ ); return 0; case SBM_SETRANGE32: SetScrollRange32( hwnd, SB_CTL, wParam, lParam, FALSE ); return 0; /* FIXME: return previous position */ case SBM_GETRANGE16: FIXME(scroll, "don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam ); return 0; case SBM_GETRANGE32: GetScrollRange32( hwnd, SB_CTL, (LPINT32)wParam, (LPINT32)lParam ); return 0; case SBM_ENABLE_ARROWS16: case SBM_ENABLE_ARROWS32: return EnableScrollBar32( hwnd, SB_CTL, wParam ); case SBM_SETRANGEREDRAW32: SetScrollRange32( hwnd, SB_CTL, wParam, lParam, TRUE ); return 0; /* FIXME: return previous position */ case SBM_SETSCROLLINFO32: return SetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam ); case SBM_GETSCROLLINFO32: return GetScrollInfo32( hwnd, SB_CTL, (SCROLLINFO *)lParam ); case 0x00e5: case 0x00e7: case 0x00e8: case 0x00eb: case 0x00ec: case 0x00ed: case 0x00ee: case 0x00ef: ERR(scroll, "unknown Win32 msg %04x wp=%08x lp=%08lx\n", message, wParam, lParam ); break; default: if (message >= WM_USER) WARN(scroll, "unknown msg %04x wp=%04x lp=%08lx\n", message, wParam, lParam ); return DefWindowProc32A( hwnd, message, wParam, lParam ); } return 0; } /************************************************************************* * SetScrollInfo16 (USER.475) */ INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info, BOOL16 bRedraw ) { return (INT16)SetScrollInfo32( hwnd, nBar, info, bRedraw ); } /************************************************************************* * SetScrollInfo32 (USER32.501) * SetScrollInfo32 can be used to set the position, upper bound, * lower bound, and page size of a scrollbar control. * * RETURNS * Scrollbar position * * NOTE * For 100 lines of text to be displayed in a window of 25 lines, * one would for instance use info->nMin=0, info->nMax=75 * (corresponding to the 76 different positions of the window on * the text), and info->nPage=25. */ INT32 WINAPI SetScrollInfo32( HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */, INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */, const SCROLLINFO *info /* [I] Specifies what to change and new values */, BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */) { INT32 action; INT32 retVal = SCROLL_SetScrollInfo( hwnd, nBar, info, &action ); if( action & SA_SSI_HIDE ) SCROLL_ShowScrollBar( hwnd, nBar, FALSE, FALSE ); else { if( action & SA_SSI_SHOW ) if( SCROLL_ShowScrollBar( hwnd, nBar, TRUE, TRUE ) ) return retVal; /* SetWindowPos() already did the painting */ if( bRedraw && (action & SA_SSI_REFRESH)) SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE ); else if( action & SA_SSI_REPAINT_ARROWS ) SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, FALSE ); } return retVal; } INT32 SCROLL_SetScrollInfo( HWND32 hwnd, INT32 nBar, const SCROLLINFO *info, INT32 *action ) { /* Update the scrollbar state and set action flags according to * what has to be done graphics wise. */ SCROLLBAR_INFO *infoPtr; UINT32 new_flags; dbg_decl_str(scroll, 256); *action = 0; if (!(infoPtr = SCROLL_GetScrollInfo(hwnd, nBar))) return 0; if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return 0; if ((info->cbSize != sizeof(*info)) && (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return 0; /* Set the page size */ if (info->fMask & SIF_PAGE) { dsprintf(scroll, " page=%d", info->nPage ); if( infoPtr->Page != info->nPage ) { infoPtr->Page = info->nPage; *action |= SA_SSI_REFRESH; } } /* Set the scroll pos */ if (info->fMask & SIF_POS) { dsprintf(scroll, " pos=%d", info->nPos ); if( infoPtr->CurVal != info->nPos ) { infoPtr->CurVal = info->nPos; *action |= SA_SSI_REFRESH; } } /* Set the scroll range */ if (info->fMask & SIF_RANGE) { dsprintf(scroll, " min=%d max=%d", info->nMin, info->nMax ); /* Invalid range -> range is set to (0,0) */ if ((info->nMin > info->nMax) || ((UINT32)(info->nMax - info->nMin) >= 0x80000000)) { infoPtr->MinVal = 0; infoPtr->MaxVal = 0; } else { if( infoPtr->MinVal != info->nMin || infoPtr->MaxVal != info->nMax ) { *action |= SA_SSI_REFRESH; infoPtr->MinVal = info->nMin; infoPtr->MaxVal = info->nMax; } } } TRACE(scroll, "hwnd=%04x bar=%d %s\n", hwnd, nBar, dbg_str(scroll)); /* Make sure the page size is valid */ if (infoPtr->Page < 0) infoPtr->Page = 0; else if (infoPtr->Page > infoPtr->MaxVal - infoPtr->MinVal + 1 ) infoPtr->Page = infoPtr->MaxVal - infoPtr->MinVal + 1; /* Make sure the pos is inside the range */ if (infoPtr->CurVal < infoPtr->MinVal) infoPtr->CurVal = infoPtr->MinVal; else if (infoPtr->CurVal > infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 )) infoPtr->CurVal = infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 ); TRACE(scroll, " new values: page=%d pos=%d min=%d max=%d\n", infoPtr->Page, infoPtr->CurVal, infoPtr->MinVal, infoPtr->MaxVal ); /* Check if the scrollbar should be hidden or disabled */ if (info->fMask & (SIF_RANGE | SIF_PAGE | SIF_DISABLENOSCROLL)) { new_flags = infoPtr->flags; if (infoPtr->MinVal >= infoPtr->MaxVal - MAX( infoPtr->Page-1, 0 )) { /* Hide or disable scroll-bar */ if (info->fMask & SIF_DISABLENOSCROLL) { new_flags = ESB_DISABLE_BOTH; *action |= SA_SSI_REFRESH; } else if (nBar != SB_CTL) { *action = SA_SSI_HIDE; goto done; } } else /* Show and enable scroll-bar */ { new_flags = 0; if (nBar != SB_CTL) *action |= SA_SSI_SHOW; } if (infoPtr->flags != new_flags) /* check arrow flags */ { infoPtr->flags = new_flags; *action |= SA_SSI_REPAINT_ARROWS; } } done: /* Return current position */ return infoPtr->CurVal; } /************************************************************************* * GetScrollInfo16 (USER.476) */ BOOL16 WINAPI GetScrollInfo16( HWND16 hwnd, INT16 nBar, LPSCROLLINFO info ) { return GetScrollInfo32( hwnd, nBar, info ); } /************************************************************************* * GetScrollInfo32 (USER32.284) * GetScrollInfo32 can be used to retrieve the position, upper bound, * lower bound, and page size of a scrollbar control. * * RETURNS STD */ BOOL32 WINAPI GetScrollInfo32( HWND32 hwnd /* [I] Handle of window */ , INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */, LPSCROLLINFO info /* [IO] (info.fMask [I] specifies which values are to retrieve) */) { SCROLLBAR_INFO *infoPtr; if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE; if (info->fMask & ~(SIF_ALL | SIF_DISABLENOSCROLL)) return FALSE; if ((info->cbSize != sizeof(*info)) && (info->cbSize != sizeof(*info)-sizeof(info->nTrackPos))) return FALSE; if (info->fMask & SIF_PAGE) info->nPage = infoPtr->Page; if (info->fMask & SIF_POS) info->nPos = infoPtr->CurVal; if ((info->fMask & SIF_TRACKPOS) && (info->cbSize == sizeof(*info))) info->nTrackPos = (SCROLL_TrackingWin==hwnd) ? SCROLL_TrackingVal : 0; if (info->fMask & SIF_RANGE) { info->nMin = infoPtr->MinVal; info->nMax = infoPtr->MaxVal; } return (info->fMask & SIF_ALL) != 0; } /************************************************************************* * SetScrollPos16 (USER.62) */ INT16 WINAPI SetScrollPos16( HWND16 hwnd, INT16 nBar, INT16 nPos, BOOL16 bRedraw ) { return (INT16)SetScrollPos32( hwnd, nBar, nPos, bRedraw ); } /************************************************************************* * SetScrollPos32 (USER32.502) * * RETURNS * Success: Scrollbar position * Failure: 0 * * REMARKS * Note the ambiguity when 0 is returned. Use GetLastError * to make sure there was an error (and to know which one). */ INT32 WINAPI SetScrollPos32( HWND32 hwnd /* [I] Handle of window whose scrollbar will be affected */, INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */, INT32 nPos /* [I] New value */, BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ ) { SCROLLINFO info; SCROLLBAR_INFO *infoPtr; INT32 oldPos; if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0; oldPos = infoPtr->CurVal; info.cbSize = sizeof(info); info.nPos = nPos; info.fMask = SIF_POS; SetScrollInfo32( hwnd, nBar, &info, bRedraw ); return oldPos; } /************************************************************************* * GetScrollPos16 (USER.63) */ INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar ) { return (INT16)GetScrollPos32( hwnd, nBar ); } /************************************************************************* * GetScrollPos32 (USER32.285) * * RETURNS * Success: Current position * Failure: 0 * * REMARKS * Note the ambiguity when 0 is returned. Use GetLastError * to make sure there was an error (and to know which one). */ INT32 WINAPI GetScrollPos32( HWND32 hwnd, /* [I] Handle of window */ INT32 nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */) { SCROLLBAR_INFO *infoPtr; if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0; return infoPtr->CurVal; } /************************************************************************* * SetScrollRange16 (USER.64) */ void WINAPI SetScrollRange16( HWND16 hwnd, INT16 nBar, INT16 MinVal, INT16 MaxVal, BOOL16 bRedraw ) { /* Invalid range -> range is set to (0,0) */ if ((INT32)MaxVal - (INT32)MinVal > 0x7fff) MinVal = MaxVal = 0; SetScrollRange32( hwnd, nBar, MinVal, MaxVal, bRedraw ); } /************************************************************************* * SetScrollRange32 (USER32.503) * * RETURNS STD */ BOOL32 WINAPI SetScrollRange32( HWND32 hwnd, /* [I] Handle of window whose scrollbar will be affected */ INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */ INT32 MinVal, /* [I] New minimum value */ INT32 MaxVal, /* [I] New maximum value */ BOOL32 bRedraw /* [I] Should scrollbar be redrawn afterwards ? */) { SCROLLINFO info; info.cbSize = sizeof(info); info.nMin = MinVal; info.nMax = MaxVal; info.fMask = SIF_RANGE; SetScrollInfo32( hwnd, nBar, &info, bRedraw ); return TRUE; } /************************************************************************* * SCROLL_SetNCSbState * * Updates both scrollbars at the same time. Used by MDI CalcChildScroll(). */ INT32 SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos, int hMin, int hMax, int hPos) { INT32 vA, hA; SCROLLINFO vInfo, hInfo; vInfo.cbSize = hInfo.cbSize = sizeof(SCROLLINFO); vInfo.nMin = vMin; hInfo.nMin = hMin; vInfo.nMax = vMax; hInfo.nMax = hMax; vInfo.nPos = vPos; hInfo.nPos = hPos; vInfo.fMask = hInfo.fMask = SIF_RANGE | SIF_POS; SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_VERT, &vInfo, &vA ); SCROLL_SetScrollInfo( wndPtr->hwndSelf, SB_HORZ, &hInfo, &hA ); if( !SCROLL_ShowScrollBar( wndPtr->hwndSelf, SB_BOTH, (hA & SA_SSI_SHOW),(vA & SA_SSI_SHOW) ) ) { /* SetWindowPos() wasn't called, just redraw the scrollbars if needed */ if( vA & SA_SSI_REFRESH ) SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_VERT, FALSE, TRUE ); if( hA & SA_SSI_REFRESH ) SCROLL_RefreshScrollBar( wndPtr->hwndSelf, SB_HORZ, FALSE, TRUE ); } return 0; } /************************************************************************* * GetScrollRange16 (USER.65) */ BOOL16 WINAPI GetScrollRange16( HWND16 hwnd, INT16 nBar, LPINT16 lpMin, LPINT16 lpMax) { INT32 min, max; BOOL16 ret = GetScrollRange32( hwnd, nBar, &min, &max ); if (lpMin) *lpMin = min; if (lpMax) *lpMax = max; return ret; } /************************************************************************* * GetScrollRange32 (USER32.286) * * RETURNS STD */ BOOL32 WINAPI GetScrollRange32( HWND32 hwnd, /* [I] Handle of window */ INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */ LPINT32 lpMin, /* [O] Where to store minimum value */ LPINT32 lpMax /* [O] Where to store maximum value */) { SCROLLBAR_INFO *infoPtr; if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) { if (lpMin) lpMin = 0; if (lpMax) lpMax = 0; return FALSE; } if (lpMin) *lpMin = infoPtr->MinVal; if (lpMax) *lpMax = infoPtr->MaxVal; return TRUE; } /************************************************************************* * SCROLL_ShowScrollBar() * * Back-end for ShowScrollBar(). Returns FALSE if no action was taken. * NOTE: fShowV/fShowH must be zero when nBar is SB_HORZ/SB_VERT. */ BOOL32 SCROLL_ShowScrollBar( HWND32 hwnd, INT32 nBar, BOOL32 fShowH, BOOL32 fShowV ) { WND *wndPtr = WIN_FindWndPtr( hwnd ); if (!wndPtr) return FALSE; TRACE(scroll, "hwnd=%04x bar=%d horz=%d, vert=%d\n", hwnd, nBar, fShowH, fShowV ); switch(nBar) { case SB_CTL: ShowWindow32( hwnd, fShowH ? SW_SHOW : SW_HIDE ); return TRUE; case SB_BOTH: case SB_HORZ: if (fShowH) { fShowH = !(wndPtr->dwStyle & WS_HSCROLL); wndPtr->dwStyle |= WS_HSCROLL; } else /* hide it */ { fShowH = (wndPtr->dwStyle & WS_HSCROLL); wndPtr->dwStyle &= ~WS_HSCROLL; } if( nBar == SB_HORZ ) break; /* fall through */ case SB_VERT: if (fShowV) { fShowV = !(wndPtr->dwStyle & WS_VSCROLL); wndPtr->dwStyle |= WS_VSCROLL; } else /* hide it */ { fShowV = (wndPtr->dwStyle & WS_VSCROLL); wndPtr->dwStyle &= ~WS_VSCROLL; } break; default: return FALSE; /* Nothing to do! */ } if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */ { SetWindowPos32( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED ); return TRUE; } return FALSE; /* no frame changes */ } /************************************************************************* * ShowScrollBar16 (USER.267) */ void WINAPI ShowScrollBar16( HWND16 hwnd, INT16 nBar, BOOL16 fShow ) { SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow, (nBar == SB_HORZ) ? 0 : fShow ); } /************************************************************************* * ShowScrollBar32 (USER32.532) * * RETURNS STD */ BOOL32 WINAPI ShowScrollBar32( HWND32 hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */ INT32 nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */ BOOL32 fShow /* [I] TRUE = show, FALSE = hide */) { SCROLL_ShowScrollBar( hwnd, nBar, (nBar == SB_VERT) ? 0 : fShow, (nBar == SB_HORZ) ? 0 : fShow ); return TRUE; } /************************************************************************* * EnableScrollBar16 (USER.482) */ BOOL16 WINAPI EnableScrollBar16( HWND16 hwnd, INT16 nBar, UINT16 flags ) { return EnableScrollBar32( hwnd, nBar, flags ); } /************************************************************************* * EnableScrollBar32 (USER32.171) */ BOOL32 WINAPI EnableScrollBar32( HWND32 hwnd, INT32 nBar, UINT32 flags ) { BOOL32 bFineWithMe; SCROLLBAR_INFO *infoPtr; TRACE(scroll, "%04x %d %d\n", hwnd, nBar, flags ); flags &= ESB_DISABLE_BOTH; if (nBar == SB_BOTH) { if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, SB_VERT ))) return FALSE; if (!(bFineWithMe = (infoPtr->flags == flags)) ) { infoPtr->flags = flags; SCROLL_RefreshScrollBar( hwnd, SB_VERT, TRUE, TRUE ); } nBar = SB_HORZ; } else bFineWithMe = TRUE; if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return FALSE; if (bFineWithMe && infoPtr->flags == flags) return FALSE; infoPtr->flags = flags; SCROLL_RefreshScrollBar( hwnd, nBar, TRUE, TRUE ); return TRUE; }