void CSettingsDialog::ExpandTree()
{
HTREEITEM hti = m_TreeCtrl.GetRootItem();
while (hti)
{
ExpandBranch(hti);
hti = m_TreeCtrl.GetNextSiblingItem(hti);
}
}
void CSettingsDialog::ExpandBranch(HTREEITEM hti)
{
if( m_TreeCtrl.ItemHasChildren( hti ) )
{
m_TreeCtrl.Expand( hti, TVE_EXPAND );
hti = m_TreeCtrl.GetChildItem( hti );
do
{
ExpandBranch( hti );
} while( (hti = m_TreeCtrl.GetNextSiblingItem( hti )) != NULL );
}
m_TreeCtrl.EnsureVisible( m_TreeCtrl.GetSelectedItem() );
}
BOOL COXNetBrowseTree::BuildTreeContents()
{
SetRedraw(FALSE);
// If the tree till contains nodes, remove them all
DeleteAllItems();
// Cleanup data members
Cleanup();
// Create the root node
if (0 < m_nMaxNumLevels)
ExpandNode(NULL);
// Expand all top level items
HTREEITEM hTopItem = NULL;
hTopItem = GetRootItem();
while (hTopItem != NULL)
{
ExpandBranch(hTopItem, m_nInitialExpandLevel);
hTopItem = GetNextSiblingItem(hTopItem);
}
// If at least one top level item is expandable, connect lines to
// the root of the control otherwise do not
BOOL bLinesAtRoot = FALSE;
hTopItem = GetRootItem();
while(!bLinesAtRoot && (hTopItem != NULL))
{
bLinesAtRoot = ItemHasChildren(hTopItem);
hTopItem = GetNextSiblingItem(hTopItem);
}
if (bLinesAtRoot)
ModifyStyle(0, TVS_LINESATROOT /* add */);
else
ModifyStyle(TVS_LINESATROOT /* remove */, 0);
SetRedraw(TRUE);
return TRUE;
}
void COXNetBrowseTree::ExpandBranch(HTREEITEM hParentItem, int nLevels)
{
if (nLevels <= 0)
return;
ASSERT(hParentItem != NULL);
// First expand the parent itself
if (!Expand(hParentItem, TVE_EXPAND))
// ... Expand failed (the network resource probably produced an error)
return;
// Then expand all its children
HTREEITEM hChildItem = GetChildItem(hParentItem);
while (hChildItem != NULL)
{
ExpandBranch(hChildItem, nLevels - 1);
hChildItem = GetNextSiblingItem(hChildItem);
}
}