int WINAPI CoolSB_SetScrollInfo(HWND hwnd, int fnBar, LPSCROLLINFO lpsi, BOOL fRedraw)
{
BOOL fRecalcFrame = FALSE;
if (!lpsi)
return FALSE;
SCROLLINFO *mysi = GetScrollInfoFromHwnd(hwnd, fnBar);
if (!mysi)
return SetScrollInfo(hwnd, fnBar, lpsi, fRedraw);
if (lpsi->fMask & SIF_RANGE) {
mysi->nMin = lpsi->nMin;
mysi->nMax = lpsi->nMax;
}
//The nPage member must specify a value from 0 to nMax - nMin +1.
if (lpsi->fMask & SIF_PAGE) {
UINT t = (UINT)(mysi->nMax - mysi->nMin + 1);
mysi->nPage = min(lpsi->nPage, t);
}
//The nPos member must specify a value between nMin and nMax - max(nPage - 1, 0).
if (lpsi->fMask & SIF_POS) {
mysi->nPos = max(lpsi->nPos, mysi->nMin);
mysi->nPos = min((UINT)mysi->nPos, mysi->nMax - max(mysi->nPage - 1, 0));
}
SCROLLBAR *sbar = GetScrollBarFromHwnd(hwnd, fnBar);
if (sbar == NULL)
return 0;
if ((lpsi->fMask & SIF_DISABLENOSCROLL) || (sbar->fScrollFlags & CSBS_THUMBALWAYS)) {
if (!sbar->fScrollVisible) {
CoolSB_ShowScrollBar(hwnd, fnBar, TRUE);
fRecalcFrame = TRUE;
}
}
else {
if (mysi->nPage > (UINT)mysi->nMax
|| mysi->nPage == (UINT)mysi->nMax && mysi->nMax == 0
|| mysi->nMax <= mysi->nMin) {
if (sbar->fScrollVisible) {
CoolSB_ShowScrollBar(hwnd, fnBar, FALSE);
fRecalcFrame = TRUE;
}
}
else {
if (!sbar->fScrollVisible) {
CoolSB_ShowScrollBar(hwnd, fnBar, TRUE);
fRecalcFrame = TRUE;
}
}
}
if (fRedraw && !CoolSB_IsThumbTracking(hwnd))
RedrawNonClient(hwnd, fRecalcFrame);
return mysi->nPos;
}
int WINAPI CoolSB_SetScrollPos(HWND hwnd, int nBar, int nPos, BOOL fRedraw)
{
int oldpos;
SCROLLINFO *mysi = GetScrollInfoFromHwnd(hwnd, nBar);
if (!mysi)
return SetScrollPos(hwnd, nBar, nPos, fRedraw);
//validate and set the scollbar position
oldpos = mysi->nPos;
mysi->nPos = max(nPos, mysi->nMin);
mysi->nPos = min((UINT)mysi->nPos, mysi->nMax - max(mysi->nPage - 1, 0));
if (fRedraw && !CoolSB_IsThumbTracking(hwnd))
RedrawNonClient(hwnd, FALSE);
return oldpos;
}
int WINAPI CoolSB_SetScrollRange(HWND hwnd, int nBar, int nMinPos, int nMaxPos, BOOL fRedraw)
{
SCROLLINFO *mysi = GetScrollInfoFromHwnd(hwnd, nBar);
if (!mysi)
return SetScrollRange(hwnd, nBar, nMinPos, nMaxPos, fRedraw);
if (CoolSB_IsThumbTracking(hwnd))
return mysi->nPos;
//hide the scrollbar if nMin == nMax
//nMax-nMin must not be greater than MAXLONG
mysi->nMin = nMinPos;
mysi->nMax = nMaxPos;
if (fRedraw)
RedrawNonClient(hwnd, FALSE);
return TRUE;
}
int WINAPI CoolSB_SetScrollPos(HWND hwnd, int nBar, int nPos, BOOL fRedraw)
{
SCROLLINFO *mysi;
int oldpos;
if(!(mysi = GetScrollInfoFromHwnd(hwnd, nBar)))
{
return SetScrollPos(hwnd, nBar, nPos, fRedraw);
}
//this is what should happen, but real scrollbars don't work like this..
//if(CoolSB_IsThumbTracking(hwnd))
// return mysi->nPos;
//validate and set the scollbar position
oldpos = mysi->nPos;
mysi->nPos = max(nPos, mysi->nMin);
mysi->nPos = min((UINT)mysi->nPos, mysi->nMax - max(mysi->nPage - 1, 0));
if(fRedraw && !CoolSB_IsThumbTracking(hwnd))
RedrawNonClient(hwnd, FALSE);
return oldpos;
}
