void RecalcScrollBar(HWND hwnd,struct ClcData *dat)
{
SCROLLINFO si = {0};
RECT clRect;
NMCLISTCONTROL nm;
boolean sbar = FALSE;
GetClientRect(hwnd,&clRect);
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
si.nMin = 0;
si.nMax = dat->rowHeight*GetGroupContentsCount(&dat->list,2)-1;
si.nPage = clRect.bottom;
si.nPos = dat->yScroll;
nm.hdr.code = CLN_LISTSIZECHANGE;
nm.hdr.hwndFrom = hwnd;
nm.hdr.idFrom = GetDlgCtrlID(hwnd);
nm.pt.y = si.nMax;
SendMessage(GetParent(hwnd),WM_NOTIFY,0,(LPARAM)&nm);
GetClientRect(hwnd,&clRect);
si.cbSize = sizeof(si);
si.fMask = SIF_ALL;
si.nMin = 0;
si.nMax = dat->rowHeight*GetGroupContentsCount(&dat->list,2)-1;
si.nPage = clRect.bottom;
si.nPos = dat->yScroll;
sbar = (dat->noVScrollbar == 1||(int)si.nPage>si.nMax);
ShowScrollBar(hwnd,SB_VERT,sbar? FALSE : TRUE);
if ( !sbar) {
if ( GetWindowLongPtr(hwnd,GWL_STYLE)&CLS_CONTACTLIST ) {
if ( dat->noVScrollbar == 0 ) SetScrollInfo(hwnd,SB_VERT,&si,TRUE);
else SetScrollInfo(hwnd,SB_VERT,&si,FALSE);
}
else SetScrollInfo(hwnd,SB_VERT,&si,TRUE);
}
ScrollTo(hwnd,dat,dat->yScroll,1);
}
void ScrollTo(HWND hwnd,struct ClcData *dat,int desty,int noSmooth)
{
DWORD startTick,nowTick;
int oldy = dat->yScroll;
RECT clRect,rcInvalidate;
int maxy,previousy;
if (dat->iHotTrack != -1 && dat->yScroll != desty) {
pcli->pfnInvalidateItem(hwnd,dat,dat->iHotTrack);
dat->iHotTrack = -1;
ReleaseCapture();
}
GetClientRect(hwnd,&clRect);
rcInvalidate = clRect;
maxy = dat->rowHeight*GetGroupContentsCount(&dat->list,2)-clRect.bottom;
if (desty>maxy) desty = maxy;
if (desty<0) desty = 0;
if (abs(desty-dat->yScroll)<4) noSmooth = 1;
if ( !noSmooth && dat->exStyle&CLS_EX_NOSMOOTHSCROLLING) noSmooth = 1;
previousy = dat->yScroll;
if ( !noSmooth) {
startTick = GetTickCount();
for (;;) {
nowTick = GetTickCount();
if (nowTick>=startTick+dat->scrollTime) break;
dat->yScroll = oldy+(desty-oldy)*(int)(nowTick-startTick)/dat->scrollTime;
if (dat->backgroundBmpUse&CLBF_SCROLL || dat->hBmpBackground == NULL)
ScrollWindowEx(hwnd,0,previousy-dat->yScroll,NULL,NULL,NULL,NULL,SW_INVALIDATE);
else
InvalidateRect(hwnd,NULL,FALSE);
previousy = dat->yScroll;
SetScrollPos(hwnd,SB_VERT,dat->yScroll,TRUE);
UpdateWindow(hwnd);
}
}
dat->yScroll = desty;
if (dat->backgroundBmpUse&CLBF_SCROLL || dat->hBmpBackground == NULL)
ScrollWindowEx(hwnd,0,previousy-dat->yScroll,NULL,NULL,NULL,NULL,SW_INVALIDATE);
else
InvalidateRect(hwnd,NULL,FALSE);
SetScrollPos(hwnd,SB_VERT,dat->yScroll,TRUE);
}
void SetGroupExpand(HWND hwnd,struct ClcData *dat,struct ClcGroup *group,int newState)
{
int contentCount;
int groupy;
int newy;
int posy;
RECT clRect;
NMCLISTCONTROL nm;
if(newState==-1) group->expanded^=1;
else {
if(group->expanded==(newState!=0)) return;
group->expanded=newState!=0;
}
InvalidateRectZ(hwnd,NULL,FALSE);
if (group->expanded)
contentCount=GetGroupContentsCount(group,1);
else
contentCount=0;
groupy=GetRowsPriorTo(&dat->list,group,-1);
if(dat->selection>groupy && dat->selection<groupy+contentCount) dat->selection=groupy;
RecalcScrollBar(hwnd,dat);
GetClientRect(hwnd,&clRect);
newy=dat->yScroll;
posy = RowHeights_GetItemBottomY(dat, groupy+contentCount);
if(posy>=newy+clRect.bottom)
newy=posy-clRect.bottom;
posy = RowHeights_GetItemTopY(dat, groupy);
if(newy>posy) newy=posy;
ScrollTo(hwnd,dat,newy,0);
nm.hdr.code=CLN_EXPANDED;
nm.hdr.hwndFrom=hwnd;
nm.hdr.idFrom=GetDlgCtrlID(hwnd);
nm.hItem=(HANDLE)group->groupId;
nm.action=group->expanded;
SendMessage(GetParent(hwnd),WM_NOTIFY,0,(LPARAM)&nm);
}
