void COptionTree::EnsureVisible(COptionTreeItem *otiItem)
{
// Declare variables
COptionTreeItem* otiParent;
CRect rcClient;
CPoint ptPoint;
long lOY;
// Make sure valid
if (otiItem == NULL)
{
return;
}
// Item is not scroll visible (expand all parents)
if (IsItemVisible(otiItem) == FALSE)
{
otiParent = otiItem->GetParent();
while (otiParent != NULL)
{
otiParent->Expand();
otiParent = otiParent->GetParent();
}
UpdatedItems();
UpdateWindow();
}
// Item should be visible
if (IsItemVisible(otiItem) == FALSE)
{
return;
}
// Calculate list client rectangle
m_otlList.GetClientRect(rcClient);
rcClient.OffsetRect(0, m_ptOrigin.y);
rcClient.bottom -= otiItem->GetHeight();
// Get item location
ptPoint = otiItem->GetLocation();
//when the item is at the end will get a bug ,so avoid it
ptPoint.y -= 2;
if (!rcClient.PtInRect(ptPoint))
{
if (ptPoint.y < rcClient.top)
{
lOY = ptPoint.y;
}
else
{
lOY = ptPoint.y - rcClient.Height() + otiItem->GetHeight();
}
m_otlList.OnVScroll(SB_THUMBTRACK, lOY, NULL);
}
}
