void AwtScrollPane::SetScrollInfo(int orient, int max, int page,
BOOL disableNoScroll)
{
DTRACE_PRINTLN4("AwtScrollPane::SetScrollInfo %d, %d, %d, %d", orient, max, page, disableNoScroll);
SCROLLINFO si;
int posBefore;
int posAfter;
posBefore = GetScrollPos(orient);
si.cbSize = sizeof(SCROLLINFO);
si.nMin = 0;
si.nMax = max;
si.fMask = SIF_RANGE;
if (disableNoScroll) {
si.fMask |= SIF_DISABLENOSCROLL;
}
if (page > 0) {
si.fMask |= SIF_PAGE;
si.nPage = page;
}
::SetScrollInfo(GetHWnd(), orient, &si, TRUE);
// scroll position may have changed when thumb is at the end of the bar
// and the page size changes
posAfter = GetScrollPos(orient);
if (posBefore != posAfter) {
PostScrollEvent(orient, SB_THUMBPOSITION, posAfter);
}
}
void AwtScrollPane::SetScrollInfo(int orient, int max, int page,
BOOL disableNoScroll)
{
DTRACE_PRINTLN4("AwtScrollPane::SetScrollInfo %d, %d, %d, %d", orient, max, page, disableNoScroll);
SCROLLINFO si;
int posBefore;
int posAfter;
posBefore = GetScrollPos(orient);
si.cbSize = sizeof(SCROLLINFO);
si.nMin = 0;
si.nMax = max;
si.fMask = SIF_RANGE;
if (disableNoScroll) {
si.fMask |= SIF_DISABLENOSCROLL;
}
if (page > 0) {
si.fMask |= SIF_PAGE;
si.nPage = page;
}
::SetScrollInfo(GetHWnd(), orient, &si, TRUE);
// scroll position may have changed when thumb is at the end of the bar
// and the page size changes
posAfter = GetScrollPos(orient);
if (posBefore != posAfter) {
if(max==0 && posAfter==0) {
// Caller used nMin==nMax idiom to hide scrollbar.
// On the new themes (Windows XP, Vista) this would reset
// scroll position to zero ("just inside the range") (6404832).
//
PostScrollEvent(orient, SB_THUMBPOSITION, posBefore);
}else{
PostScrollEvent(orient, SB_THUMBPOSITION, posAfter);
}
}
}
MsgRouting AwtScrollPane::WmHScroll(UINT scrollCode, UINT pos, HWND hScrollPane)
{
// While user scrolls using tracker, SCROLLINFO.nPos is not changed, SCROLLINFO.nTrackPos is changed instead.
int dragP = scrollCode == SB_THUMBPOSITION || scrollCode == SB_THUMBTRACK;
int newPos = GetScrollPos(SB_HORZ);
if ( dragP ) {
SCROLLINFO si;
ZeroMemory(&si, sizeof(si));
si.cbSize = sizeof(si);
si.fMask = SIF_TRACKPOS;
::GetScrollInfo(GetHWnd(), SB_HORZ, &si);
newPos = si.nTrackPos;
}
PostScrollEvent(SB_HORZ, scrollCode, newPos);
return mrConsume;
}