void EXWaitingTreeCtrl::PreExpandItem(HTREEITEM hItem)
{
if (!NeedsChildren(hItem))
{
if (WantsRefresh(hItem))
{
// delete child items before populating
DeleteChildren(hItem);
}
else
{
// doesn't want new items
m_hItemToPopulate = NULL;
return;
}
}
// if it wants new child items, go on
m_hItemToPopulate = hItem;
// fix redraw when expanded programatically
UpdateWindow();
// hide changes until it's expanded
SetRedraw(FALSE);
// add wait msg, to allow item expansion
m_hItemMsg = InsertItem(m_sWaitMsg, m_hItemToPopulate);
// zero progress
m_iItemCount = 1;
m_iItemIndex = 0;
}
void CTangramHtmlTreeExWnd::PreExpandItem(HTREEITEM hItem)
{
if(hItem)
{
m_hCurSelectedItem = hItem;
CTangramXHtmlTreeNode *pXTCD = GetItemDataStruct(hItem);
if(pXTCD->m_hWaitItemMsg)
{
m_hItemToPopulate = hItem;
// fix redraw when expanded programatically
UpdateWindow();
// hide changes until it's expanded
SetRedraw(false);
// add wait msg, to allow item expansion
m_hItemMsg = pXTCD->m_hWaitItemMsg;//InsertItem(m_sWaitMsg, m_hItemToPopulate);
// zero progress
m_iItemCount = 1;
m_iItemIndex = 0;
return;
}
}
if (!NeedsChildren(hItem))
{
if (WantsRefresh(hItem))
{
// delete child items before populating
DeleteChildren(hItem);
}
else
{
// doesn't want new items
m_hItemToPopulate = NULL;
return;
}
}
// if it wants new child items, go on
m_hItemToPopulate = hItem;
// fix redraw when expanded programatically
UpdateWindow();
// hide changes until it's expanded
SetRedraw(false);
// add wait msg, to allow item expansion
m_hItemMsg = InsertItem(m_sWaitMsg, m_hItemToPopulate);
// zero progress
m_iItemCount = 1;
m_iItemIndex = 0;
}
void EXWaitingTreeCtrl::OnItemExpanded(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_TREEVIEW* pNMTreeView = (NM_TREEVIEW*)pNMHDR;
if (pNMTreeView->action & TVE_EXPAND)
ExpandItem(pNMTreeView->itemNew.hItem);
else if (pNMTreeView->action & TVE_COLLAPSE)
{
if (WantsRefresh(pNMTreeView->itemNew.hItem))
{
// delete child items
DeleteChildren(pNMTreeView->itemNew.hItem);
}
}
*pResult = 0;
}
