BOOL ShowScrollBar (HWND hWnd, int iSBar, BOOL bShow)
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
BOOL bPrevState;
RECT rcBar;
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin, iSBar)) )
return FALSE;
bPrevState = !(pSBar->status & SBS_HIDE);
if (bShow && !bPrevState)
pSBar->status &= ~SBS_HIDE;
else if (!bShow && bPrevState)
pSBar->status |= SBS_HIDE;
else
return FALSE;
#if 0//fix: no WM_CHANGESIZE
SendMessage (hWnd, WM_CHANGESIZE, 0, 0);
#endif
if (iSBar == SB_VERT)
wndGetVScrollBarRect (pWin, &rcBar);
else
wndGetHScrollBarRect (pWin, &rcBar);
{
RECT rcWin, rcClient;
memcpy (&rcWin, &pWin->winrect.left, sizeof (RECT));
rcClient.left = 0;
rcClient.top = 0;
rcClient.right = pWin->clirect.right - pWin->clirect.left;
rcClient.bottom = pWin->clirect.bottom - pWin->clirect.top;
#if 0//fix: no WM_SIZECHANGED
SendMessage/*SendAsyncMessage*/ (hWnd, WM_SIZECHANGED,
(WPARAM)&rcWin, (LPARAM)&rcClient);
#endif
}
if (bShow) {
SendMessage (hWnd, WM_NCPAINT, 0, 0);
}
else {
rcBar.left -= pWin->clirect.left;
rcBar.top -= pWin->clirect.top;
rcBar.right -= pWin->clirect.left;
rcBar.bottom -= pWin->clirect.top;
SendMessage (hWnd, WM_NCPAINT, 0, 0);
InvalidateRect (hWnd, &rcBar, TRUE);
}
return TRUE;
}
BOOL SetScrollRangeEx (HWND hWnd, int iSBar, int iMinPos, int iMaxPos) /* jmt: iSBar not used */
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
RECT rcBar;
DWORD dwStyle; /* jmt:2k0820 */
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin)) )
return FALSE;
pSBar->minPos = (iMinPos < iMaxPos)?iMinPos:iMaxPos;
pSBar->maxPos = (iMinPos > iMaxPos)?iMinPos:iMaxPos;
/* validate parameters. */
if (pSBar->curPos < pSBar->minPos)
pSBar->curPos = pSBar->minPos;
if (pSBar->pageStep <= 0)
pSBar->pageStep = 0;
else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1))
pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1;
{
int max = pSBar->maxPos;
max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0;
if (pSBar->curPos > max)
pSBar->curPos = max;
}
dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */
if (dwStyle == SBS_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
wndScrollBarPos (pWin, dwStyle == SBS_HORZ, &rcBar);
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */
#endif
return TRUE;
}
BOOL SetScrollRange (HWND hWnd, int iSBar, int iMinPos, int iMaxPos)
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
RECT rcBar;
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin, iSBar)) )
return FALSE;
pSBar->minPos = (iMinPos < iMaxPos)?iMinPos:iMaxPos;
pSBar->maxPos = (iMinPos > iMaxPos)?iMinPos:iMaxPos;
// validate parameters.
if (pSBar->curPos < pSBar->minPos)
pSBar->curPos = pSBar->minPos;
if (pSBar->pageStep <= 0)
pSBar->pageStep = 0;
else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1))
pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1;
{
int max = pSBar->maxPos;
max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0;
if (pSBar->curPos > max)
pSBar->curPos = max;
}
if (iSBar == SB_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
wndScrollBarPos (pWin, iSBar == SB_HORZ, &rcBar);
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintNCScrollbars(hWnd,NULL);//a must
#endif
return TRUE;
}
BOOL SetScrollPos (HWND hWnd, int iSBar, int iNewPos)//ok
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
RECT rcBar;
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin, iSBar)) )
return FALSE;
if (iNewPos < pSBar->minPos)
pSBar->curPos = pSBar->minPos;
else
pSBar->curPos = iNewPos;
{
int max = pSBar->maxPos;
max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0;
if (pSBar->curPos > max)
pSBar->curPos = max;
}
if (iSBar == SB_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
wndScrollBarPos (pWin, iSBar == SB_HORZ, &rcBar);
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintNCScrollbars(hWnd,NULL);//a must
#endif
return TRUE;
}
BOOL EnableScrollBarEx (HWND hWnd, int iSBar, BOOL bEnable) /* jmt: iSBar not used */
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
BOOL bPrevState;
RECT rcBar;
DWORD dwStyle; /* jmt:2k0820 */
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin)) )
return FALSE;
bPrevState = !(pSBar->status & SBS_DISABLED);
if (bEnable && !bPrevState)
pSBar->status &= ~SBS_DISABLED;
else if (!bEnable && bPrevState)
pSBar->status |= SBS_DISABLED;
else
return FALSE;
dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */
if (dwStyle == SBS_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */
#endif
return TRUE;
}
BOOL EnableScrollBar (HWND hWnd, int iSBar, BOOL bEnable)//ok
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
BOOL bPrevState;
RECT rcBar;
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin, iSBar)) )//ok
return FALSE;
bPrevState = !(pSBar->status & SBS_DISABLED);
if (bEnable && !bPrevState)
pSBar->status &= ~SBS_DISABLED;
else if (!bEnable && bPrevState)
pSBar->status |= SBS_DISABLED;
else
return FALSE;
if (iSBar == SB_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintNCScrollbars(hWnd,NULL);//a must
#endif
return TRUE;
}
static LRESULT CALLBACK
ScrollbarControlProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) /* jmt:2k0820 */
{
DWORD dwStyle;
MWSCROLLBARINFO* pData;
int moveRange;
RECT rcBar;
dwStyle = (GetWindowStyle (hwnd) & SBS_TYPEMASK);
switch (message)
{
case WM_CREATE:
if (!(pData = malloc (sizeof (MWSCROLLBARINFO))))
{
fprintf(stderr, "Create scroll bar control failure!\n");
return -1;
}
pData->minPos=0; /* min value of scroll range.*/
/* max value of scroll range.*/
pData->maxPos=0;
if (dwStyle==SBS_VERT)
moveRange=((hwnd->winrect.bottom-hwnd->winrect.top)
-((hwnd->winrect.right-hwnd->winrect.left)<<1));
else
moveRange=((hwnd->winrect.right-hwnd->winrect.left)
-((hwnd->winrect.bottom-hwnd->winrect.top)<<1));
if (moveRange > MWM_MINBARLEN)
{
pData->maxPos=moveRange / MWM_MINBARLEN;
if( (moveRange % MWM_MINBARLEN) )
pData->maxPos++;
}
printf("maxPos=%d\n",pData->maxPos);
pData->curPos=0; /* current scroll pos.*/
/* steps per page.*/
pData->pageStep=1;
if ( (pData->maxPos - 2) > 1)
pData->pageStep = pData->maxPos - 2;
printf("pageStep=%d\n",pData->pageStep);
pData->barStart=0; /* start pixel of bar.*/
pData->barLen=MWM_MINBARLEN; /* length of bar.*/
pData->status=SBS_UNKNOWN; /* status of scroll bar.*/
#if 0 /* jmt: must handle WM_MOVE */
pData->rc=hwnd->winrect; /* screen coordinates position*/
#endif
hwnd->userdata = (DWORD)pData;
if (dwStyle == SBS_VERT)
{
wndGetVScrollBarRect (hwnd, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (hwnd, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
/* adjust pData->barLen */
wndScrollBarPos (hwnd, dwStyle == SBS_HORZ, &rcBar);
break;
case WM_DESTROY:
free ((void *)(hwnd->userdata));
break;
case WM_PAINT:
MwPaintScrollbars(hwnd,NULL,dwStyle);
break;
case WM_NCLBUTTONDOWN:
case WM_NCLBUTTONDBLCLK:
case WM_NCMOUSEMOVE:
case WM_NCLBUTTONUP:
MwHandleMessageScrollbar(hwnd, wParam, lParam, message, dwStyle);
break;
case WM_HSCROLL:
case WM_VSCROLL:
{
int newTop,itemCount,itemVisibles;
pData = (MWSCROLLBARINFO *)hwnd->userdata;
newTop = pData->curPos;
itemCount = pData->maxPos - pData->minPos + 1;
itemVisibles = pData->pageStep;
switch(wParam)
{
case SB_LINEDOWN:
#define ITEM_BOTTOM(x) (x->curPos + itemVisibles - 1)
if (ITEM_BOTTOM (pData) < (itemCount - 1 ))
{
newTop ++;
}
break;
case SB_LINEUP:
if (pData->curPos > 0)
{
newTop --;
}
break;
case SB_PAGEDOWN:
if ((pData->curPos + (itemVisibles << 1)) <=
itemCount)
newTop += itemVisibles;
else
newTop = itemCount - itemVisibles;
if (newTop < 0)
return 0;
break;
case SB_PAGEUP:
if (pData->curPos >= itemVisibles)
newTop -= itemVisibles;
else
newTop = 0;
break;
case SB_THUMBTRACK:
newTop = (int)lParam;
break;
}
pData->curPos = newTop;
SendMessage (hwnd, WM_PAINT, 0, 0);
sbSetScrollInfo (hwnd, pData, TRUE);
return 0;
}
break;
default:
return DefWindowProc (hwnd, message, wParam, lParam);
}
return 0;
}
BOOL ShowScrollBarEx (HWND hWnd, int iSBar, BOOL bShow) /* jmt: iSBar not used */
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
BOOL bPrevState;
RECT rcBar;
DWORD dwStyle; /* jmt:2k0820 */
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin)) )
return FALSE;
bPrevState = !(pSBar->status & SBS_HIDE);
if (bShow && !bPrevState)
pSBar->status &= ~SBS_HIDE;
else if (!bShow && bPrevState)
pSBar->status |= SBS_HIDE;
else
return FALSE;
#if 0 /* fix: no WM_CHANGESIZE */
SendMessage (hWnd, WM_CHANGESIZE, 0, 0);
#endif
dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */
if (dwStyle == SBS_VERT)
wndGetVScrollBarRect (pWin, &rcBar);
else
wndGetHScrollBarRect (pWin, &rcBar);
{
RECT rcWin, rcClient;
memcpy (&rcWin, &pWin->winrect.left, sizeof (RECT));
rcClient.left = 0;
rcClient.top = 0;
rcClient.right = pWin->clirect.right - pWin->clirect.left;
rcClient.bottom = pWin->clirect.bottom - pWin->clirect.top;
#if 0 /* fix: no WM_SIZECHANGED */
SendMessage (hWnd, WM_SIZECHANGED,
(WPARAM)&rcWin, (LPARAM)&rcClient);
#endif
}
if (bShow) {
SendMessage (hWnd, WM_NCPAINT, 0, 0);
}
else {
rcBar.left -= pWin->clirect.left;
rcBar.top -= pWin->clirect.top;
rcBar.right -= pWin->clirect.left;
rcBar.bottom -= pWin->clirect.top;
SendMessage (hWnd, WM_NCPAINT, 0, 0);
InvalidateRect (hWnd, &rcBar, TRUE);
}
return TRUE;
}
BOOL SetScrollInfoEx (HWND hWnd, int iSBar,
LPCSCROLLINFO lpsi, BOOL fRedraw) /* jmt: iSBar not used */
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
RECT rcBar;
DWORD dwStyle; /* jmt:2k0820 */
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin)) )
return FALSE;
if( lpsi->fMask & SIF_RANGE )
{
pSBar->minPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMin:lpsi->nMax;
pSBar->maxPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMax:lpsi->nMin;
}
if( lpsi->fMask & SIF_POS )
pSBar->curPos = lpsi->nPos;
if( lpsi->fMask & SIF_PAGE )
pSBar->pageStep = lpsi->nPage;
/* validate parameters. */
if (pSBar->curPos < pSBar->minPos)
pSBar->curPos = pSBar->minPos;
if (pSBar->pageStep <= 0)
pSBar->pageStep = 0;
else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1))
pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1;
{
int max = pSBar->maxPos;
max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0;
if (pSBar->curPos > max)
pSBar->curPos = max;
}
dwStyle = (GetWindowStyle (hWnd) & SBS_TYPEMASK); /* jmt: 2k0820 */
if(fRedraw)
{
if (dwStyle == SBS_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
wndScrollBarPos (pWin, dwStyle == SBS_HORZ, &rcBar);
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintScrollbars(hWnd,NULL,dwStyle); /* a must */
#endif
}
return TRUE;
}
void
MwPaintScrollbars(HWND hwnd, HDC hdc, DWORD style)
{
BOOL vertbar = (style==SBS_VERT);
BOOL horzbar = (style==SBS_HORZ);
BOOL fGotDC = FALSE;
RECT rc,rc2;
POINT p3[3];
int shrink=2;
int start = 0;
RECT rcHBar, rcVBar;
int cx,cy;
MWSCROLLBARINFO* pData;
pData = (MWSCROLLBARINFO *)hwnd->userdata;
rc = hwnd->winrect;
cx=rc.right-rc.left;
cy=rc.bottom-rc.top;
if (!hdc && (horzbar || vertbar)) {
hdc = GetWindowDC(hwnd);
fGotDC = TRUE;
}
if (vertbar) {
#if 1
/* bkgnd */
rc2.left=rc.left; rc2.right=rc2.left+ cx;
rc2.top=rc.top;
rc2.bottom=rc2.top+ cx;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
rc2.top=rc.bottom- cx;
rc2.bottom=rc2.top+ cx;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
#endif
/* up */
Draw3dUpDownState(hdc, rc.left, rc.top,
cx, cx,
pData->status & SBS_UPARROW);
/* down */
Draw3dUpDownState(hdc, rc.left,rc.bottom-cx,
cx, cx,
pData->status & SBS_DOWNARROW);
/* jmt: draw arrows */
SelectObject(hdc,GetStockObject(BLACK_BRUSH));
/* up */
p3[0].x= rc.left + (cx/2) - 1;
p3[0].y= rc.top + 2 + shrink;
p3[1].x= rc.left + 2 + shrink - 1;
p3[1].y= rc.top + (cx-4) - shrink;
p3[2].x= rc.left + (cx-4) - shrink;
p3[2].y= rc.top + (cx-4) - shrink;
Polygon(hdc,p3,3);
/* down */
p3[0].x= rc.left + (cx/2) - 1;
p3[0].y= rc.bottom - 4 - shrink;
p3[1].x= rc.left + 2 + shrink - 1;
p3[1].y= rc.bottom-cx + 2 + shrink;
p3[2].x= rc.left + (cx-4) - shrink;
p3[2].y= rc.bottom-cx + 2 + shrink;
Polygon(hdc,p3,3);
/* draw moving bar */
wndGetVScrollBarRect (hwnd, &rcVBar);
rcVBar.left -- ;
/*rcVBar.right -- ;*/
start = rcVBar.top + cx + pData->barStart;
if (start + pData->barLen > rcVBar.bottom)
start = rcVBar.bottom - pData->barLen;
if (pData->barLen == 0)
pData->barLen=rc.bottom-rc.top-(cx*2);
/* bkgnd */
rc2.left=rc.left; rc2.right=rc.right/*-1*/;
rc2.top=rc.top+cx;
rc2.bottom=start;
if (rc2.bottom>rc2.top)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
rc2.top=start+pData->barLen;
rc2.bottom=rc.bottom-cx;
if (rc2.bottom>rc2.top)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
Draw3dUpFrame (hdc, rcVBar.left, start, rcVBar.right,
start + pData->barLen);
/*printf("barv:(l,t,r,b):(%d,%d,%d,%d)\n",
rcVBar.left, start, rcVBar.right,
start + pData->barLen);*/
}
if (horzbar) {
#if 1
/* bkgnd */
rc2.top=rc.top; rc2.bottom=rc2.top+ cy;
rc2.left=rc.left;
rc2.right=rc2.left+ cy;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
rc2.left=rc.right- cy;
rc2.right=rc2.left+ cy;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
#endif
/* left */
Draw3dUpDownState(hdc, rc.left, rc.top,
cy, cy,
pData->status & SBS_LEFTARROW);
/* right */
Draw3dUpDownState(hdc, rc.right-cy, rc.top,
cy, cy,
pData->status & SBS_RIGHTARROW);
/* jmt: draw arrows */
SelectObject(hdc,GetStockObject(BLACK_BRUSH));
/* left */
p3[0].x= rc.left + 2 + shrink;
p3[0].y= rc.top + (cy/2) ;
p3[1].x= rc.left + (cy-4) - shrink ;
p3[1].y= rc.top + 2 + shrink;
p3[2].x= rc.left + (cy-4) - shrink;
p3[2].y= rc.bottom - 4 - shrink + 1;
Polygon(hdc,p3,3);
/* right */
p3[0].x= rc.right - 4 - shrink;
p3[0].y= rc.top + (cy/2) ;
p3[1].x= rc.right-cy + 2 + shrink ;
p3[1].y= rc.top + 2 + shrink;
p3[2].x= rc.right-cy + 2 + shrink;
p3[2].y= rc.bottom - 4 - shrink + 1;
Polygon(hdc,p3,3);
/* draw moving bar. */
wndGetHScrollBarRect (hwnd, &rcHBar);
rcHBar.top -- ;
/*rcHBar.bottom -- ;*/
start = rcHBar.left + cy + pData->barStart;
if (start + pData->barLen > rcHBar.right)
start = rcHBar.right - pData->barLen;
if (pData->barLen == 0)
pData->barLen=rc.right-rc.left-(cy*2);
/* bkgnd */
rc2.top=rc.top; rc2.bottom=rc.bottom/*-1*/;
rc2.left=rc.left+cy;
rc2.right=start;
if (rc2.right>rc2.left)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
rc2.left=start+pData->barLen;
rc2.right=rc.right-cy;
if (rc2.right>rc2.left)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
Draw3dUpFrame (hdc, start, rcHBar.top, start + pData->barLen,
rcHBar.bottom);
/*printf("barh:(l,t,r,b):(%d,%d,%d,%d)\n",
start, rcHBar.top, start + pData->barLen,
rcHBar.bottom);*/
}
if (fGotDC)
ReleaseDC(hwnd, hdc);
}
BOOL SetScrollInfo (HWND hWnd, int iSBar,
LPCSCROLLINFO lpsi, BOOL fRedraw)//ok
{
PMWSCROLLBARINFO pSBar;
HWND pWin;
RECT rcBar;
pWin = (HWND)hWnd;
if ( !(pSBar = wndGetScrollBar (pWin, iSBar)) )
return FALSE;
if( lpsi->fMask & SIF_RANGE )
{
pSBar->minPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMin:lpsi->nMax;
pSBar->maxPos = (lpsi->nMin < lpsi->nMax)?lpsi->nMax:lpsi->nMin;
}
if( lpsi->fMask & SIF_POS )
pSBar->curPos = lpsi->nPos;
if( lpsi->fMask & SIF_PAGE )
pSBar->pageStep = lpsi->nPage;
// validate parameters.
if (pSBar->curPos < pSBar->minPos)
pSBar->curPos = pSBar->minPos;
if (pSBar->pageStep <= 0)
pSBar->pageStep = 0;
else if (pSBar->pageStep > (pSBar->maxPos - pSBar->minPos + 1))
pSBar->pageStep = pSBar->maxPos - pSBar->minPos + 1;
{
int max = pSBar->maxPos;
max -= ((pSBar->pageStep - 1) > 0)?(pSBar->pageStep - 1):0;
if (pSBar->curPos > max)
pSBar->curPos = max;
}
if(fRedraw)
{
if (iSBar == SB_VERT)
{
wndGetVScrollBarRect (pWin, &rcBar);
rcBar.left --;
rcBar.right --;
}
else
{
wndGetHScrollBarRect (pWin, &rcBar);
rcBar.top --;
rcBar.bottom --;
}
wndScrollBarPos (pWin, iSBar == SB_HORZ, &rcBar);
#if 0
SendMessage (hWnd, WM_NCPAINT, 0, (LPARAM)(&rcBar));
#else
MwPaintNCScrollbars(hWnd,NULL);//a must
#endif
}
return TRUE;
}
void
MwPaintNCScrollbars(HWND hwnd, HDC hdc)
{
BOOL vertbar = VSCROLLBARVISIBLE(hwnd);
BOOL horzbar = HSCROLLBARVISIBLE(hwnd);
BOOL fGotDC = FALSE;
RECT rc,rc2;
POINT p3[3];
int shrink=2;
int start = 0;
RECT rcHBar, rcVBar;
if (!hdc && (horzbar || vertbar)) {
hdc = GetWindowDC(hwnd);
fGotDC = TRUE;
}
if (horzbar && vertbar) {
rc.left = hwnd->clirect.right;
rc.top = hwnd->clirect.bottom;
rc.right = rc.left + mwSYSMETRICS_CXVSCROLL;
rc.bottom = rc.top + mwSYSMETRICS_CYHSCROLL;
FillRect(hdc, &rc, (HBRUSH)(COLOR_BTNFACE+1));
}
if (vertbar) {
rc = hwnd->vscroll.rc;
#if 1
/* bkgnd */
rc2.left=rc.left; rc2.right=rc2.left+ mwSYSMETRICS_CXVSCROLL;
rc2.top=rc.top;
rc2.bottom=rc2.top+ mwSYSMETRICS_CYHSCROLL;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
rc2.top=rc.bottom- mwSYSMETRICS_CYHSCROLL;
rc2.bottom=rc2.top+ mwSYSMETRICS_CYHSCROLL;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
#endif
/* up */
Draw3dUpDownState(hdc, rc.left, rc.top,
mwSYSMETRICS_CXVSCROLL, mwSYSMETRICS_CYHSCROLL,
hwnd->vscroll.status & SBS_UPARROW);
/* down */
Draw3dUpDownState(hdc, rc.left,rc.bottom-mwSYSMETRICS_CYHSCROLL,
mwSYSMETRICS_CXVSCROLL, mwSYSMETRICS_CYHSCROLL,
hwnd->vscroll.status & SBS_DOWNARROW);
//jmt: draw arrows
SelectObject(hdc,GetStockObject(BLACK_BRUSH));
/* up */
p3[0].x= rc.left + (mwSYSMETRICS_CXVSCROLL/2) - 1;
p3[0].y= rc.top + 2 + shrink;
p3[1].x= rc.left + 2 + shrink - 1;
p3[1].y= rc.top + (mwSYSMETRICS_CYHSCROLL-4) - shrink;
p3[2].x= rc.left + (mwSYSMETRICS_CXVSCROLL-4) - shrink;
p3[2].y= rc.top + (mwSYSMETRICS_CYHSCROLL-4) - shrink;
Polygon(hdc,p3,3);
/* down */
p3[0].x= rc.left + (mwSYSMETRICS_CXVSCROLL/2) - 1;
p3[0].y= rc.bottom - 4 - shrink;
p3[1].x= rc.left + 2 + shrink - 1;
p3[1].y= rc.bottom-mwSYSMETRICS_CYHSCROLL + 2 + shrink;
p3[2].x= rc.left + (mwSYSMETRICS_CXVSCROLL-4) - shrink;
p3[2].y= rc.bottom-mwSYSMETRICS_CYHSCROLL + 2 + shrink;
Polygon(hdc,p3,3);
// draw moving bar
wndGetVScrollBarRect (hwnd, &rcVBar);
rcVBar.left -- ;
rcVBar.right -- ;
start = rcVBar.top + mwSYSMETRICS_CYVSCROLL + hwnd->vscroll.barStart;
if (start + hwnd->vscroll.barLen > rcVBar.bottom)
start = rcVBar.bottom - hwnd->vscroll.barLen;
if (hwnd->vscroll.barLen == 0)
hwnd->vscroll.barLen=rc.bottom-rc.top-(mwSYSMETRICS_CYVSCROLL*2);
/* bkgnd */
rc2.left=rc.left; rc2.right=rc.right/*-1*/;
rc2.top=rc.top+mwSYSMETRICS_CYHSCROLL;
rc2.bottom=start;
if (rc2.bottom>rc2.top)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
rc2.top=start+hwnd->vscroll.barLen;
rc2.bottom=rc.bottom-mwSYSMETRICS_CYHSCROLL;
if (rc2.bottom>rc2.top)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
Draw3dUpFrame (hdc, rcVBar.left, start, rcVBar.right,
start + hwnd->vscroll.barLen);
#if 0
printf("barv:(l,t,r,b):(%d,%d,%d,%d)\n",
rcVBar.left, start, rcVBar.right,
start + hwnd->vscroll.barLen);
#endif
}
if (horzbar) {
rc = hwnd->hscroll.rc;
#if 1
/* bkgnd */
rc2.top=rc.top; rc2.bottom=rc2.top+ mwSYSMETRICS_CYHSCROLL;
rc2.left=rc.left;
rc2.right=rc2.left+ mwSYSMETRICS_CXVSCROLL;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
rc2.left=rc.right- mwSYSMETRICS_CXVSCROLL;
rc2.right=rc2.left+ mwSYSMETRICS_CXVSCROLL;
FillRect(hdc, &rc2, (HBRUSH)(COLOR_BTNFACE+1));
#endif
/* left */
Draw3dUpDownState(hdc, rc.left, rc.top,
mwSYSMETRICS_CXVSCROLL, mwSYSMETRICS_CYHSCROLL,
hwnd->hscroll.status & SBS_LEFTARROW);
/* right */
Draw3dUpDownState(hdc, rc.right-mwSYSMETRICS_CXVSCROLL, rc.top,
mwSYSMETRICS_CXVSCROLL, mwSYSMETRICS_CYHSCROLL,
hwnd->hscroll.status & SBS_RIGHTARROW);
//jmt: draw arrows
SelectObject(hdc,GetStockObject(BLACK_BRUSH));
/* left */
p3[0].x= rc.left + 2 + shrink;
p3[0].y= rc.top + (mwSYSMETRICS_CYHSCROLL/2) ;
p3[1].x= rc.left + (mwSYSMETRICS_CXVSCROLL-4) - shrink ;
p3[1].y= rc.top + 2 + shrink;
p3[2].x= rc.left + (mwSYSMETRICS_CXVSCROLL-4) - shrink;
p3[2].y= rc.bottom - 4 - shrink + 1;
Polygon(hdc,p3,3);
/* right */
p3[0].x= rc.right - 4 - shrink;
p3[0].y= rc.top + (mwSYSMETRICS_CYHSCROLL/2) ;
p3[1].x= rc.right-mwSYSMETRICS_CXVSCROLL + 2 + shrink ;
p3[1].y= rc.top + 2 + shrink;
p3[2].x= rc.right-mwSYSMETRICS_CXVSCROLL + 2 + shrink;
p3[2].y= rc.bottom - 4 - shrink + 1;
Polygon(hdc,p3,3);
// draw moving bar.
wndGetHScrollBarRect (hwnd, &rcHBar);
rcHBar.top -- ;
rcHBar.bottom -- ;
start = rcHBar.left + mwSYSMETRICS_CXHSCROLL + hwnd->hscroll.barStart;
if (start + hwnd->hscroll.barLen > rcHBar.right)
start = rcHBar.right - hwnd->hscroll.barLen;
if (hwnd->hscroll.barLen == 0)
hwnd->hscroll.barLen=rc.right-rc.left-(mwSYSMETRICS_CXHSCROLL*2);
/* bkgnd */
rc2.top=rc.top; rc2.bottom=rc.bottom/*-1*/;
rc2.left=rc.left+mwSYSMETRICS_CXVSCROLL;
rc2.right=start;
if (rc2.right>rc2.left)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
rc2.left=start+hwnd->hscroll.barLen;
rc2.right=rc.right-mwSYSMETRICS_CXVSCROLL;
if (rc2.right>rc2.left)
FillRect(hdc, &rc2, (HBRUSH)GetStockObject(DKGRAY_BRUSH));
Draw3dUpFrame (hdc, start, rcHBar.top, start + hwnd->hscroll.barLen,
rcHBar.bottom);
#if 0
printf("barh:(l,t,r,b):(%d,%d,%d,%d)\n",
start, rcHBar.top, start + hwnd->hscroll.barLen,
rcHBar.bottom);
#endif
}
if (fGotDC)
ReleaseDC(hwnd, hdc);
}
