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wine/controls/scroll.c
Ron Cemer e0ec8fd931 Fixes for several bugs in which portions of the scrollbar were not 
being redrawn correctly, the focus rectangle was not being correctly
removed from the thumb before redrawing, etc.; added complete Win9x
and WinNT look and feel support.
1999-06-06 17:19:18 +00:00

1558 lines
49 KiB
C
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/*
* Scrollbar control
*
* Copyright 1993 Martin Ayotte
* Copyright 1994, 1996 Alexandre Julliard
*/
#include "wine/winuser16.h"
#include "scroll.h"
#include "heap.h"
#include "win.h"
#include "debugtools.h"
#include "tweak.h"
DEFAULT_DEBUG_CHANNEL(scroll)
static HBITMAP hUpArrow = 0;
static HBITMAP hDnArrow = 0;
static HBITMAP hLfArrow = 0;
static HBITMAP hRgArrow = 0;
static HBITMAP hUpArrowD = 0;
static HBITMAP hDnArrowD = 0;
static HBITMAP hLfArrowD = 0;
static HBITMAP hRgArrowD = 0;
static HBITMAP hUpArrowI = 0;
static HBITMAP hDnArrowI = 0;
static HBITMAP hLfArrowI = 0;
static HBITMAP 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 HWND SCROLL_TrackingWin = 0;
static INT SCROLL_TrackingBar = 0;
static INT SCROLL_TrackingPos = 0;
static INT SCROLL_TrackingVal = 0;
/* Hit test code of the last button-down event */
static enum SCROLL_HITTEST SCROLL_trackHitTest;
static BOOL SCROLL_trackVertical;
/* Is the moving thumb being displayed? */
static BOOL SCROLL_MovingThumb = FALSE;
/* Local functions */
static BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
BOOL fShowH, BOOL fShowV );
static INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
const SCROLLINFO *info, INT *action );
/***********************************************************************
* SCROLL_LoadBitmaps
*/
static void SCROLL_LoadBitmaps(void)
{
hUpArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROW) );
hDnArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROW) );
hLfArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROW) );
hRgArrow = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROW) );
hUpArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWD) );
hDnArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWD) );
hLfArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWD) );
hRgArrowD = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWD) );
hUpArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_UPARROWI) );
hDnArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_DNARROWI) );
hLfArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_LFARROWI) );
hRgArrowI = LoadBitmapA( 0, MAKEINTRESOURCEA(OBM_RGARROWI) );
}
/***********************************************************************
* SCROLL_GetPtrScrollInfo
*/
static SCROLLBAR_INFO *SCROLL_GetPtrScrollInfo( WND* wndPtr, INT 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( HWND hwnd, INT nBar )
{
SCROLLBAR_INFO *retvalue;
WND *wndPtr = WIN_FindWndPtr( hwnd );
retvalue = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
WIN_ReleaseWndPtr(wndPtr);
return retvalue;
}
/***********************************************************************
* 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 BOOL SCROLL_GetScrollBarRect( HWND hwnd, INT nBar, RECT *lprect,
INT *arrowSize, INT *thumbSize,
INT *thumbPos )
{
INT pixels;
BOOL 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 + GetSystemMetrics(SM_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 + GetSystemMetrics(SM_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:
GetClientRect( hwnd, lprect );
vertical = ((wndPtr->dwStyle & SBS_VERT) != 0);
break;
default:
WIN_ReleaseWndPtr(wndPtr);
return FALSE;
}
if (vertical) pixels = lprect->bottom - lprect->top;
else pixels = lprect->right - lprect->left;
if (pixels <= 2*GetSystemMetrics(SM_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 = GetSystemMetrics(SM_CXVSCROLL);
pixels -= (2 * (GetSystemMetrics(SM_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 = GetSystemMetrics(SM_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
{
INT 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);
}
}
WIN_ReleaseWndPtr(wndPtr);
return vertical;
}
/***********************************************************************
* SCROLL_GetThumbVal
*
* Compute the current scroll position based on the thumb position in pixels
* from the top of the scroll-bar.
*/
static UINT SCROLL_GetThumbVal( SCROLLBAR_INFO *infoPtr, RECT *rect,
BOOL vertical, INT pos )
{
INT thumbSize;
INT pixels = vertical ? rect->bottom-rect->top : rect->right-rect->left;
if ((pixels -= 2*(GetSystemMetrics(SM_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 = GetSystemMetrics(SM_CXVSCROLL);
if ((pixels -= thumbSize) <= 0) return infoPtr->MinVal;
pos = MAX( 0, pos - (GetSystemMetrics(SM_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 BOOL SCROLL_PtInRectEx( LPRECT lpRect, POINT pt, BOOL vertical )
{
RECT 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 PtInRect( &rect, pt );
}
/***********************************************************************
* SCROLL_ClipPos
*/
static POINT SCROLL_ClipPos( LPRECT lpRect, POINT 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( HWND hwnd, INT nBar,
POINT pt, BOOL bDragging )
{
INT arrowSize, thumbSize, thumbPos;
RECT rect;
BOOL vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbSize, &thumbPos );
if ( (bDragging && !SCROLL_PtInRectEx( &rect, pt, vertical )) ||
(!PtInRect( &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( HDC hdc, SCROLLBAR_INFO *infoPtr,
RECT *rect, INT arrowSize, BOOL vertical,
BOOL top_pressed, BOOL bottom_pressed )
{
HDC hdcMem = CreateCompatibleDC( hdc );
HBITMAP hbmpPrev = SelectObject( hdcMem, vertical ?
TOP_ARROW(infoPtr->flags, top_pressed)
: LEFT_ARROW(infoPtr->flags, top_pressed));
INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 1 : 0;
if (offset) arrowSize--;
SetStretchBltMode( hdc, STRETCH_DELETESCANS );
StretchBlt( hdc, rect->left+offset, rect->top+offset,
vertical ? rect->right-(rect->left+offset) : arrowSize,
vertical ? arrowSize : rect->bottom-(rect->top+offset),
hdcMem, 0, 0,
GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
SRCCOPY );
SelectObject( hdcMem, vertical ?
BOTTOM_ARROW( infoPtr->flags, bottom_pressed )
: RIGHT_ARROW( infoPtr->flags, bottom_pressed ) );
if (vertical)
StretchBlt( hdc, (rect->left+offset), rect->bottom - arrowSize,
rect->right - (rect->left+offset), arrowSize,
hdcMem, 0, 0,
GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
SRCCOPY );
else
StretchBlt( hdc, rect->right - arrowSize, rect->top+offset,
arrowSize, rect->bottom - (rect->top+offset),
hdcMem, 0, 0,
GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
SRCCOPY );
SelectObject( hdcMem, hbmpPrev );
DeleteDC( hdcMem );
}
/***********************************************************************
* SCROLL_DrawMovingThumb
*
* Draw the moving thumb rectangle.
*/
static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
INT arrowSize, INT thumbSize )
{
RECT 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;
}
DrawFocusRect( hdc, &r );
SCROLL_MovingThumb = !SCROLL_MovingThumb;
}
/***********************************************************************
* SCROLL_DrawInterior
*
* Draw the scroll bar interior (everything except the arrows).
*/
static void SCROLL_DrawInterior( HWND hwnd, HDC hdc, INT nBar,
RECT *rect, INT arrowSize,
INT thumbSize, INT thumbPos,
UINT flags, BOOL vertical,
BOOL top_selected, BOOL bottom_selected )
{
RECT r;
BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
if (Save_SCROLL_MovingThumb &&
(SCROLL_TrackingWin == hwnd) &&
(SCROLL_TrackingBar == nBar))
SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
/* Select the correct brush and pen */
SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
if ((flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
{
/* This ought to be the color of the parent window */
SelectObject( hdc, GetSysColorBrush(COLOR_WINDOW) );
}
else
{
if (nBar == SB_CTL) /* Only scrollbar controls send WM_CTLCOLOR */
{
HBRUSH hbrush = SendMessageA(GetParent(hwnd),
WM_CTLCOLORSCROLLBAR, hdc, hwnd );
SelectObject( hdc, hbrush );
}
else SelectObject( hdc, GetSysColorBrush(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 */
/* Only draw outline if Win 3.1. Mar 24, 1999 - Ronald B. Cemer */
if (TWEAK_WineLook == WIN31_LOOK)
Rectangle( hdc, r.left, r.top, r.right, r.bottom );
/* Draw the scroll rectangles and thumb */
if (!thumbPos) /* No thumb to draw */
{
PatBlt( hdc, r.left+1, r.top+1, r.right - r.left - 2,
r.bottom - r.top - 2, PATCOPY );
return;
}
if (vertical)
{
PatBlt( 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);
PatBlt( 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 */
{
PatBlt( 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);
PatBlt( 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 */
SelectObject( hdc, GetSysColorBrush(COLOR_BTNFACE) );
if (TWEAK_WineLook == WIN31_LOOK)
{
Rectangle( hdc, r.left, r.top, r.right, r.bottom );
r.top++, r.left++;
}
else
{
r.top++, r.left++;
r.bottom--; r.right--;
Rectangle( hdc, r.left, r.top, r.right-1, r.bottom-1 );
}
DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT );
if (Save_SCROLL_MovingThumb &&
(SCROLL_TrackingWin == hwnd) &&
(SCROLL_TrackingBar == nBar))
SCROLL_DrawMovingThumb( hdc, rect, vertical, arrowSize, thumbSize );
}
/***********************************************************************
* SCROLL_DrawScrollBar
*
* Redraw the whole scrollbar.
*/
void SCROLL_DrawScrollBar( HWND hwnd, HDC hdc, INT nBar,
BOOL arrows, BOOL interior )
{
INT arrowSize, thumbSize, thumbPos;
RECT rect;
BOOL vertical;
WND *wndPtr = WIN_FindWndPtr( hwnd );
SCROLLBAR_INFO *infoPtr = SCROLL_GetPtrScrollInfo( wndPtr, nBar );
BOOL Save_SCROLL_MovingThumb = SCROLL_MovingThumb;
if (!wndPtr || !infoPtr ||
((nBar == SB_VERT) && !(wndPtr->dwStyle & WS_VSCROLL)) ||
((nBar == SB_HORZ) && !(wndPtr->dwStyle & WS_HSCROLL))) goto END;
if (!WIN_IsWindowDrawable( wndPtr, FALSE )) goto END;
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbSize, &thumbPos );
if (Save_SCROLL_MovingThumb &&
(SCROLL_TrackingWin == hwnd) &&
(SCROLL_TrackingBar == nBar))
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
/* Draw the arrows */
if (arrows && arrowSize)
{
if( vertical == SCROLL_trackVertical && GetCapture() == 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 );
if (Save_SCROLL_MovingThumb &&
(SCROLL_TrackingWin == hwnd) &&
(SCROLL_TrackingBar == nBar))
SCROLL_DrawMovingThumb( hdc, &rect, vertical, arrowSize, thumbSize );
END:
WIN_ReleaseWndPtr(wndPtr);
}
/***********************************************************************
* SCROLL_RefreshScrollBar
*
* Repaint the scroll bar interior after a SetScrollRange() or
* SetScrollPos() call.
*/
static void SCROLL_RefreshScrollBar( HWND hwnd, INT nBar,
BOOL arrows, BOOL interior )
{
HDC hdc = GetDCEx( hwnd, 0,
DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW) );
if (!hdc) return;
SCROLL_DrawScrollBar( hwnd, hdc, nBar, arrows, interior );
ReleaseDC( hwnd, hdc );
}
/***********************************************************************
* SCROLL_HandleKbdEvent
*
* Handle a keyboard event (only for SB_CTL scrollbars).
*/
static void SCROLL_HandleKbdEvent( HWND hwnd, WPARAM wParam )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
WPARAM 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:
WIN_ReleaseWndPtr(wndPtr);
return;
}
SendMessageA( GetParent(hwnd),
(wndPtr->dwStyle & SBS_VERT) ? WM_VSCROLL : WM_HSCROLL,
msg, hwnd );
WIN_ReleaseWndPtr(wndPtr);
}
/***********************************************************************
* 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( HWND hwnd, INT nBar, UINT msg, POINT pt)
{
/* Previous mouse position for timer events */
static POINT prevPt;
/* Thumb position when tracking started. */
static UINT trackThumbPos;
/* Position in the scroll-bar of the last button-down event. */
static INT lastClickPos;
/* Position in the scroll-bar of the last mouse event. */
static INT lastMousePos;
enum SCROLL_HITTEST hittest;
HWND hwndOwner, hwndCtl;
BOOL vertical;
INT arrowSize, thumbSize, thumbPos;
RECT rect;
HDC hdc;
SCROLLBAR_INFO *infoPtr = SCROLL_GetScrollInfo( hwnd, nBar );
if (!infoPtr) return;
if ((SCROLL_trackHitTest == SCROLL_NOWHERE) && (msg != WM_LBUTTONDOWN))
return;
hdc = GetDCEx( hwnd, 0, DCX_CACHE | ((nBar == SB_CTL) ? 0 : DCX_WINDOW));
vertical = SCROLL_GetScrollBarRect( hwnd, nBar, &rect,
&arrowSize, &thumbSize, &thumbPos );
hwndOwner = (nBar == SB_CTL) ? GetParent(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;
SetCapture( hwnd );
if (nBar == SB_CTL) SetFocus( 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("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))
{
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEUP, hwndCtl );
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC)0 );
}
}
else KillSystemTimer( 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))
{
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEUP, hwndCtl );
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC)0 );
}
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
case SCROLL_THUMB:
if (msg == WM_LBUTTONDOWN)
{
SCROLL_TrackingWin = hwnd;
SCROLL_TrackingBar = nBar;
SCROLL_TrackingPos = trackThumbPos + lastMousePos - lastClickPos;
if (!SCROLL_MovingThumb)
SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
}
else if (msg == WM_LBUTTONUP)
{
if (SCROLL_MovingThumb)
SCROLL_DrawMovingThumb(hdc, &rect, vertical, arrowSize, thumbSize);
SCROLL_TrackingWin = 0;
SCROLL_DrawInterior( hwnd, hdc, nBar, &rect, arrowSize, thumbSize,
thumbPos, infoPtr->flags, vertical,
FALSE, FALSE );
}
else /* WM_MOUSEMOVE */
{
UINT 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_MovingThumb) )
{
if (SCROLL_MovingThumb)
SCROLL_DrawMovingThumb( hdc, &rect, vertical,
arrowSize, thumbSize );
lastMousePos = pos;
SCROLL_TrackingPos = trackThumbPos + pos - lastClickPos;
SCROLL_TrackingVal = SCROLL_GetThumbVal( infoPtr, &rect,
vertical,
SCROLL_TrackingPos );
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
MAKEWPARAM( SB_THUMBTRACK, SCROLL_TrackingVal),
hwndCtl );
if (!SCROLL_MovingThumb)
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))
{
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_PAGEDOWN, hwndCtl );
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC)0 );
}
}
else KillSystemTimer( 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))
{
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_LINEDOWN, hwndCtl );
SetSystemTimer( hwnd, SCROLL_TIMER, (msg == WM_LBUTTONDOWN) ?
SCROLL_FIRST_DELAY : SCROLL_REPEAT_DELAY,
(TIMERPROC)0 );
}
}
else KillSystemTimer( hwnd, SCROLL_TIMER );
break;
}
if (msg == WM_LBUTTONUP)
{
hittest = SCROLL_trackHitTest;
SCROLL_trackHitTest = SCROLL_NOWHERE; /* Terminate tracking */
if (hittest == SCROLL_THUMB)
{
UINT val = SCROLL_GetThumbVal( infoPtr, &rect, vertical,
trackThumbPos + lastMousePos - lastClickPos );
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
MAKEWPARAM( SB_THUMBPOSITION, val ), hwndCtl );
}
else
SendMessageA( hwndOwner, vertical ? WM_VSCROLL : WM_HSCROLL,
SB_ENDSCROLL, hwndCtl );
}
ReleaseDC( hwnd, hdc );
}
/***********************************************************************
* ScrollBarWndProc
*/
LRESULT WINAPI ScrollBarWndProc( HWND hwnd, UINT message, WPARAM wParam,
LPARAM lParam )
{
switch(message)
{
case WM_CREATE:
{
CREATESTRUCTA *lpCreat = (CREATESTRUCTA *)lParam;
if (lpCreat->style & SBS_SIZEBOX)
{
FIXME("Unimplemented style SBS_SIZEBOX.\n" );
return 0;
}
if (lpCreat->style & SBS_VERT)
{
if (lpCreat->style & SBS_LEFTALIGN)
MoveWindow( hwnd, lpCreat->x, lpCreat->y,
GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
else if (lpCreat->style & SBS_RIGHTALIGN)
MoveWindow( hwnd,
lpCreat->x+lpCreat->cx-GetSystemMetrics(SM_CXVSCROLL)-1,
lpCreat->y,
GetSystemMetrics(SM_CXVSCROLL)+1, lpCreat->cy, FALSE );
}
else /* SBS_HORZ */
{
if (lpCreat->style & SBS_TOPALIGN)
MoveWindow( hwnd, lpCreat->x, lpCreat->y,
lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
else if (lpCreat->style & SBS_BOTTOMALIGN)
MoveWindow( hwnd,
lpCreat->x,
lpCreat->y+lpCreat->cy-GetSystemMetrics(SM_CYHSCROLL)-1,
lpCreat->cx, GetSystemMetrics(SM_CYHSCROLL)+1, FALSE );
}
}
if (!hUpArrow) SCROLL_LoadBitmaps();
TRACE("ScrollBar creation, hwnd=%04x\n", hwnd );
return 0;
case WM_LBUTTONDOWN:
case WM_LBUTTONUP:
case WM_MOUSEMOVE:
case WM_SYSTIMER:
{
POINT 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:
{
PAINTSTRUCT ps;
HDC hdc = BeginPaint( hwnd, &ps );
SCROLL_DrawScrollBar( hwnd, hdc, SB_CTL, TRUE, TRUE );
EndPaint( hwnd, &ps );
}
break;
case SBM_SETPOS16:
case SBM_SETPOS:
return SetScrollPos( hwnd, SB_CTL, wParam, (BOOL)lParam );
case SBM_GETPOS16:
case SBM_GETPOS:
return GetScrollPos( hwnd, SB_CTL );
case SBM_SETRANGE16:
SetScrollRange( hwnd, SB_CTL, LOWORD(lParam), HIWORD(lParam),
wParam /* FIXME: Is this correct? */ );
return 0;
case SBM_SETRANGE:
SetScrollRange( hwnd, SB_CTL, wParam, lParam, FALSE );
return 0; /* FIXME: return previous position */
case SBM_GETRANGE16:
FIXME("don't know how to handle SBM_GETRANGE16 (wp=%04x,lp=%08lx)\n", wParam, lParam );
return 0;
case SBM_GETRANGE:
GetScrollRange( hwnd, SB_CTL, (LPINT)wParam, (LPINT)lParam );
return 0;
case SBM_ENABLE_ARROWS16:
case SBM_ENABLE_ARROWS:
return EnableScrollBar( hwnd, SB_CTL, wParam );
case SBM_SETRANGEREDRAW:
SetScrollRange( hwnd, SB_CTL, wParam, lParam, TRUE );
return 0; /* FIXME: return previous position */
case SBM_SETSCROLLINFO:
return SetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam, wParam );
case SBM_GETSCROLLINFO:
return GetScrollInfo( hwnd, SB_CTL, (SCROLLINFO *)lParam );
case 0x00e5:
case 0x00e7:
case 0x00e8:
case 0x00eb:
case 0x00ec:
case 0x00ed:
case 0x00ee:
case 0x00ef:
ERR("unknown Win32 msg %04x wp=%08x lp=%08lx\n",
message, wParam, lParam );
break;
default:
if (message >= WM_USER)
WARN("unknown msg %04x wp=%04x lp=%08lx\n",
message, wParam, lParam );
return DefWindowProcA( hwnd, message, wParam, lParam );
}
return 0;
}
/*************************************************************************
* SetScrollInfo16 (USER.475)
*/
INT16 WINAPI SetScrollInfo16( HWND16 hwnd, INT16 nBar, const SCROLLINFO *info,
BOOL16 bRedraw )
{
return (INT16)SetScrollInfo( 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.
*/
INT WINAPI SetScrollInfo(
HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
const SCROLLINFO *info /* [I] Specifies what to change and new values */,
BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
{
INT action;
INT 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;
}
INT SCROLL_SetScrollInfo( HWND hwnd, INT nBar,
const SCROLLINFO *info, INT *action )
{
/* Update the scrollbar state and set action flags according to
* what has to be done graphics wise. */
SCROLLBAR_INFO *infoPtr;
UINT 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) ||
((UINT)(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("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(" 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 GetScrollInfo( 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
*/
BOOL WINAPI GetScrollInfo(
HWND hwnd /* [I] Handle of window */ ,
INT 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)SetScrollPos( 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).
*/
INT WINAPI SetScrollPos(
HWND hwnd /* [I] Handle of window whose scrollbar will be affected */,
INT nBar /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */,
INT nPos /* [I] New value */,
BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */ )
{
SCROLLINFO info;
SCROLLBAR_INFO *infoPtr;
INT oldPos;
if (!(infoPtr = SCROLL_GetScrollInfo( hwnd, nBar ))) return 0;
oldPos = infoPtr->CurVal;
info.cbSize = sizeof(info);
info.nPos = nPos;
info.fMask = SIF_POS;
SetScrollInfo( hwnd, nBar, &info, bRedraw );
return oldPos;
}
/*************************************************************************
* GetScrollPos16 (USER.63)
*/
INT16 WINAPI GetScrollPos16( HWND16 hwnd, INT16 nBar )
{
return (INT16)GetScrollPos( 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).
*/
INT WINAPI GetScrollPos(
HWND hwnd, /* [I] Handle of window */
INT 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 ((INT)MaxVal - (INT)MinVal > 0x7fff) MinVal = MaxVal = 0;
SetScrollRange( hwnd, nBar, MinVal, MaxVal, bRedraw );
}
/*************************************************************************
* SetScrollRange32 (USER32.503)
*
* RETURNS STD
*/
BOOL WINAPI SetScrollRange(
HWND hwnd, /* [I] Handle of window whose scrollbar will be affected */
INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
INT MinVal, /* [I] New minimum value */
INT MaxVal, /* [I] New maximum value */
BOOL bRedraw /* [I] Should scrollbar be redrawn afterwards ? */)
{
SCROLLINFO info;
info.cbSize = sizeof(info);
info.nMin = MinVal;
info.nMax = MaxVal;
info.fMask = SIF_RANGE;
SetScrollInfo( hwnd, nBar, &info, bRedraw );
return TRUE;
}
/*************************************************************************
* SCROLL_SetNCSbState
*
* Updates both scrollbars at the same time. Used by MDI CalcChildScroll().
*/
INT SCROLL_SetNCSbState(WND* wndPtr, int vMin, int vMax, int vPos,
int hMin, int hMax, int hPos)
{
INT 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)
{
INT min, max;
BOOL16 ret = GetScrollRange( hwnd, nBar, &min, &max );
if (lpMin) *lpMin = min;
if (lpMax) *lpMax = max;
return ret;
}
/*************************************************************************
* GetScrollRange32 (USER32.286)
*
* RETURNS STD
*/
BOOL WINAPI GetScrollRange(
HWND hwnd, /* [I] Handle of window */
INT nBar, /* [I] One of SB_HORZ, SB_VERT, or SB_CTL */
LPINT lpMin, /* [O] Where to store minimum value */
LPINT 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.
*/
BOOL SCROLL_ShowScrollBar( HWND hwnd, INT nBar,
BOOL fShowH, BOOL fShowV )
{
WND *wndPtr = WIN_FindWndPtr( hwnd );
BOOL retvalue = FALSE;
if (!wndPtr) return FALSE;
TRACE("hwnd=%04x bar=%d horz=%d, vert=%d\n",
hwnd, nBar, fShowH, fShowV );
switch(nBar)
{
case SB_CTL:
ShowWindow( hwnd, fShowH ? SW_SHOW : SW_HIDE );
retvalue = TRUE;
goto END;
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:
retvalue = FALSE; /* Nothing to do! */
goto END;
}
if( fShowH || fShowV ) /* frame has been changed, let the window redraw itself */
{
SetWindowPos( hwnd, 0, 0, 0, 0, 0, SWP_NOSIZE | SWP_NOMOVE
| SWP_NOACTIVATE | SWP_NOZORDER | SWP_FRAMECHANGED );
retvalue = TRUE;
goto END;
}
retvalue = FALSE; /* no frame changes */
END:
WIN_ReleaseWndPtr(wndPtr);
return retvalue;
}
/*************************************************************************
* 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
*/
BOOL WINAPI ShowScrollBar(
HWND hwnd, /* [I] Handle of window whose scrollbar(s) will be affected */
INT nBar, /* [I] One of SB_HORZ, SB_VERT, SB_BOTH or SB_CTL */
BOOL 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 EnableScrollBar( hwnd, nBar, flags );
}
/*************************************************************************
* EnableScrollBar32 (USER32.171)
*/
BOOL WINAPI EnableScrollBar( HWND hwnd, INT nBar, UINT flags )
{
BOOL bFineWithMe;
SCROLLBAR_INFO *infoPtr;
TRACE("%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;
}
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