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wine/controls/scroll.c
Rein Klazes e8256f589f Don't show the scrollbar if SetScrollinfo() is called with only the 
SIF_DISABLENOSCROLL flag.
2000-01-04 00:28:55 +00:00

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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 "cache.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 ((TWEAK_WineLook == WIN31_LOOK) ? 1 : 0)
/* 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 );
static void SCROLL_DrawInterior_9x( HWND hwnd, HDC hdc, INT nBar,
RECT *rect, INT arrowSize,
INT thumbSize, INT thumbPos,
UINT flags, BOOL vertical,
BOOL top_selected, BOOL bottom_selected );
/***********************************************************************
* 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_9x( HDC hdc, SCROLLBAR_INFO *infoPtr,
RECT *rect, INT arrowSize, BOOL vertical,
BOOL top_pressed, BOOL bottom_pressed )
{
RECT r;
r = *rect;
if( vertical )
r.bottom = r.top + arrowSize;
else
r.right = r.left + arrowSize;
DrawFrameControl( hdc, &r, DFC_SCROLL,
(vertical ? DFCS_SCROLLUP : DFCS_SCROLLLEFT)
| (top_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
| (infoPtr->flags&ESB_DISABLE_LTUP ? DFCS_INACTIVE : 0 ) );
r = *rect;
if( vertical )
r.top = r.bottom-arrowSize;
else
r.left = r.right-arrowSize;
DrawFrameControl( hdc, &r, DFC_SCROLL,
(vertical ? DFCS_SCROLLDOWN : DFCS_SCROLLRIGHT)
| (bottom_pressed ? (DFCS_PUSHED | DFCS_FLAT) : 0 )
| (infoPtr->flags&ESB_DISABLE_RTDN ? DFCS_INACTIVE : 0) );
}
static void SCROLL_DrawArrows_31( 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));
SetStretchBltMode( hdc, STRETCH_DELETESCANS );
StretchBlt( hdc, rect->left, rect->top,
vertical ? rect->right-rect->left : arrowSize,
vertical ? arrowSize : rect->bottom-rect->top,
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, rect->bottom - arrowSize,
rect->right - rect->left, arrowSize,
hdcMem, 0, 0,
GetSystemMetrics(SM_CXVSCROLL),GetSystemMetrics(SM_CYHSCROLL),
SRCCOPY );
else
StretchBlt( hdc, rect->right - arrowSize, rect->top,
arrowSize, rect->bottom - rect->top,
hdcMem, 0, 0,
GetSystemMetrics(SM_CXVSCROLL), GetSystemMetrics(SM_CYHSCROLL),
SRCCOPY );
SelectObject( hdcMem, hbmpPrev );
DeleteDC( hdcMem );
}
static void SCROLL_DrawArrows( HDC hdc, SCROLLBAR_INFO *infoPtr,
RECT *rect, INT arrowSize, BOOL vertical,
BOOL top_pressed, BOOL bottom_pressed )
{
if( TWEAK_WineLook == WIN31_LOOK )
SCROLL_DrawArrows_31( hdc, infoPtr, rect, arrowSize,
vertical, top_pressed,bottom_pressed );
else
SCROLL_DrawArrows_9x( hdc, infoPtr, rect, arrowSize,
vertical, top_pressed,bottom_pressed );
}
/***********************************************************************
* SCROLL_DrawMovingThumb
*
* Draw the moving thumb rectangle.
*/
static void SCROLL_DrawMovingThumb_31( 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;
}
static void SCROLL_DrawMovingThumb_9x( HDC hdc, RECT *rect, BOOL vertical,
INT arrowSize, INT thumbSize )
{
INT pos = SCROLL_TrackingPos;
INT max_size;
if( vertical )
max_size = rect->bottom - rect->top;
else
max_size = rect->right - rect->left;
max_size -= (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) + thumbSize;
if( pos < (arrowSize-SCROLL_ARROW_THUMB_OVERLAP) )
pos = (arrowSize-SCROLL_ARROW_THUMB_OVERLAP);
else if( pos > max_size )
pos = max_size;
SCROLL_DrawInterior_9x( SCROLL_TrackingWin, hdc, SCROLL_TrackingBar,
rect, arrowSize, thumbSize, pos,
0, vertical, FALSE, FALSE );
SCROLL_MovingThumb = !SCROLL_MovingThumb;
}
static void SCROLL_DrawMovingThumb( HDC hdc, RECT *rect, BOOL vertical,
INT arrowSize, INT thumbSize )
{
if( TWEAK_WineLook == WIN31_LOOK )
SCROLL_DrawMovingThumb_31( hdc, rect, vertical, arrowSize, thumbSize );
else
SCROLL_DrawMovingThumb_9x( hdc, rect, vertical, arrowSize, thumbSize );
}
/***********************************************************************
* SCROLL_DrawInterior
*
* Draw the scroll bar interior (everything except the arrows).
*/
static void SCROLL_DrawInterior_9x( 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;
HPEN hSavePen;
HBRUSH hSaveBrush,hBrush;
/* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
* The window-owned scrollbars need to call DEFWND_ControlColor
* to correctly setup default scrollbar colors
*/
if (nBar == SB_CTL)
{
hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
(WPARAM)hdc,(LPARAM)hwnd);
}
else
{
hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
}
hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
hSaveBrush = SelectObject( hdc, hBrush );
/* 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 rectangles and thumb */
if (!thumbPos) /* No thumb to draw */
{
PatBlt( hdc, r.left, r.top,
r.right - r.left, r.bottom - r.top,
PATCOPY );
/* cleanup and return */
SelectObject( hdc, hSavePen );
SelectObject( hdc, hSaveBrush );
return;
}
if (vertical)
{
PatBlt( hdc, r.left, r.top,
r.right - r.left,
thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
top_selected ? 0x0f0000 : PATCOPY );
r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
PatBlt( hdc, r.left, r.top + thumbSize,
r.right - r.left,
r.bottom - r.top - thumbSize,
bottom_selected ? 0x0f0000 : PATCOPY );
r.bottom = r.top + thumbSize;
}
else /* horizontal */
{
PatBlt( hdc, r.left, r.top,
thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
r.bottom - r.top,
top_selected ? 0x0f0000 : PATCOPY );
r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
PatBlt( hdc, r.left + thumbSize, r.top,
r.right - r.left - thumbSize,
r.bottom - r.top,
bottom_selected ? 0x0f0000 : PATCOPY );
r.right = r.left + thumbSize;
}
/* Draw the thumb */
DrawEdge( hdc, &r, EDGE_RAISED, BF_RECT | BF_MIDDLE );
/* cleanup */
SelectObject( hdc, hSavePen );
SelectObject( hdc, hSaveBrush );
}
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;
HPEN hSavePen;
HBRUSH hSaveBrush,hBrush;
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 */
if (TWEAK_WineLook == WIN31_LOOK && (flags & ESB_DISABLE_BOTH) == ESB_DISABLE_BOTH)
{
/* This ought to be the color of the parent window */
if (TWEAK_WineLook == WIN31_LOOK) {
hBrush = GetSysColorBrush(COLOR_WINDOW);
} else {
/* Under Win9x look & feel, scrollbars don't have a solid border.
* To make scrollbar's background different from the window
* background, we need to apply a gray 0x55aa pattern brush.
* Otherwise it won't look good.
*/
hBrush = CACHE_GetPattern55AABrush();
}
}
else
{
/* Only scrollbar controls send WM_CTLCOLORSCROLLBAR.
* The window-owned scrollbars need to call DEFWND_ControlColor
* to correctly setup default scrollbar colors
*/
if (nBar == SB_CTL) {
hBrush = (HBRUSH)SendMessageA( GetParent(hwnd), WM_CTLCOLORSCROLLBAR,
(WPARAM)hdc,(LPARAM)hwnd);
} else {
hBrush = DEFWND_ControlColor( hdc, CTLCOLOR_SCROLLBAR );
}
}
hSavePen = SelectObject( hdc, GetSysColorPen(COLOR_WINDOWFRAME) );
hSaveBrush = SelectObject( hdc, hBrush );
/* 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 */
{
INT offset = (TWEAK_WineLook > WIN31_LOOK) ? 0 : 1;
PatBlt( hdc, r.left+offset, r.top+offset,
r.right - r.left - 2*offset, r.bottom - r.top - 2*offset,
PATCOPY );
/* cleanup and return */
SelectObject( hdc, hSavePen );
SelectObject( hdc, hSaveBrush );
return;
}
if (vertical)
{
INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
PatBlt( hdc, r.left + offset, r.top + offset,
r.right - r.left - offset*2,
thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP) - offset,
top_selected ? 0x0f0000 : PATCOPY );
r.top += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
PatBlt( hdc, r.left + offset, r.top + thumbSize,
r.right - r.left - offset*2,
r.bottom - r.top - thumbSize - offset,
bottom_selected ? 0x0f0000 : PATCOPY );
r.bottom = r.top + thumbSize;
}
else /* horizontal */
{
INT offset = (TWEAK_WineLook == WIN31_LOOK) ? 1 : 0;
PatBlt( hdc, r.left + offset, r.top + offset,
thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP),
r.bottom - r.top - offset*2,
top_selected ? 0x0f0000 : PATCOPY );
r.left += thumbPos - (arrowSize - SCROLL_ARROW_THUMB_OVERLAP);
PatBlt( hdc, r.left + thumbSize, r.top + offset,
r.right - r.left - thumbSize - offset,
r.bottom - r.top - offset*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
{
Rectangle( hdc, r.left+1, r.top+1, 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 );
/* cleanup */
SelectObject( hdc, hSavePen );
SelectObject( hdc, hSaveBrush );
}
/***********************************************************************
* 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;
*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;
if (TRACE_ON(scroll))
{
DPRINTF( "hwnd=%04x bar=%d", hwnd, nBar);
if (info->fMask & SIF_PAGE) DPRINTF( " page=%d", info->nPage );
if (info->fMask & SIF_POS) DPRINTF( " pos=%d", info->nPos );
if (info->fMask & SIF_RANGE) DPRINTF( " min=%d max=%d", info->nMin, info->nMax );
DPRINTF("\n");
}
/* Set the page size */
if (info->fMask & SIF_PAGE)
{
if( infoPtr->Page != info->nPage )
{
infoPtr->Page = info->nPage;
*action |= SA_SSI_REFRESH;
}
}
/* Set the scroll pos */
if (info->fMask & SIF_POS)
{
if( infoPtr->CurVal != info->nPos )
{
infoPtr->CurVal = info->nPos;
*action |= SA_SSI_REFRESH;
}
}
/* Set the scroll range */
if (info->fMask & SIF_RANGE)
{
/* 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;
}
}
}
/* 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 );
/* don't change the scrollbar state if SetScrollInfo
* is just called with SIF_DISABLENOSCROLL
*/
if(!(info->fMask & SIF_ALL)) goto done;
/* 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 : infoPtr->CurVal;
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 ) {
fShowV = FALSE;
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;
}
if ( nBar == SB_VERT )
fShowH = FALSE;
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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