// since we have data in _treeData, but are displaying _tree,
// we need to copy data from treedata to trees (according to applied filter)
private void UpdateDrawnNodes()
{
_treeData.SelectedNode = _treeBindings.FindDataNode(_tree.SelectedNode);
_treeIsUnderUpdate = true;
_tree.BeginUpdate();
try
{
var filters = new NodeFilter(_treeData, _filter);
_treeBindings = TreeNodeUtils.CopyTree(_treeData, _tree, filters.FilterAction, filters.UpdateAction);
_tree.SetHorizontalScroll(0);
UpdateDrawnNodesSelection();
}
finally
{
_tree.EndUpdate();
_treeIsUnderUpdate = false;
}
}
// since we have data in _treeData, but are displaying _tree,
// we need to copy data from treedata to trees (according to applied filter)
private void UpdateDrawnNodes()
{
_treeData.SelectedNode = _treeBindings.FindDataNode(_tree.SelectedNode);
_treeIsUnderUpdate = true;
_tree.BeginUpdate();
_tree.Nodes.Clear();
try
{
// quick path
if (_filter == null)
{
_treeBindings = TreeNodeUtils.CopyTree(_treeData, _tree, null, null);
}
else
{
var visibility = new TreeNodeUtils.NodeVisibility();
TreeNodeUtils.IterateNodes(_treeData, node =>
{
if (PassesFilter(node))
{
visibility.SetVisible(node);
}
});
_treeBindings = TreeNodeUtils.CopyTree(_treeData, _tree,
node => visibility.GetVisibility(node) !=
TreeNodeUtils.NodeVisibility.VisibilityStatus.NotVisible, (data, display) =>
{
var nodeVisibility = visibility.GetVisibility(data);
if (nodeVisibility == TreeNodeUtils.NodeVisibility.VisibilityStatus.ChildVisible)
{
// this one is not directly visible, gray it out
display.ForeColor = Color.LightBlue;
}
if (nodeVisibility == TreeNodeUtils.NodeVisibility.VisibilityStatus.ParentVisible)
{
// this one is not directly visible, gray it out
display.ForeColor = Color.DarkGray;
}
// this one is visible directly, ensure it is visible (parents are expanded).
// it's children are visible as well, but may be not expanded
if (nodeVisibility == TreeNodeUtils.NodeVisibility.VisibilityStatus.Visible)
{
display.EnsureVisible();
}
});
_tree.SetHorizontalScroll(0);
}
UpdateDrawnNodesSelection();
}
finally
{
_tree.EndUpdate();
_treeIsUnderUpdate = false;
}
}
