public void SelectNodeBasedOnCursor(TextLocation loc)
{
ItemCollection items = tvxpath.Items;
Debug.Assert(items.Count <= 1);
if (items.Count != 1)
{
return;
}
LazyTreeViewItem root = (LazyTreeViewItem)tvxpath.Items[0];
IEnumerable <LazyTreeViewItem> allChilds = root.AsDepthFirstEnumerable(
x =>
{
x.Expand();
return(x.Items.Cast <LazyTreeViewItem>());
}
);
TreeViewItem match = null;
foreach (LazyTreeViewItem child in allChilds)
{
if (child.Tag != null)
{
ViewerNode node = (ViewerNode)child.Tag;
IXmlLineInfo lineInfo = node.LineInfo;
if (lineInfo != null)
{
if (lineInfo.LineNumber == loc.Line && lineInfo.LinePosition <= loc.Column)
{
//last one counts
match = child;
}
if (lineInfo.LineNumber > loc.Line || (lineInfo.LineNumber == loc.Line && lineInfo.LinePosition > loc.Column))
{
break;
}
}
}
}
if (match != null)
{
tvxpath.SelectedItemChanged -= tvxpath_SelectedItemChanged;
match.IsSelected = true;
match.BringIntoView();
tvxpath.SelectedItemChanged += tvxpath_SelectedItemChanged;
}
}
public static TreeViewItem BuildTreeView(ViewerNode vNode, Func <TreeViewItem, bool> filter)
{
if (vNode.NodeType != NodeType.Unknown)
{
LazyTreeViewItem node = null;
if (vNode.NodeType == NodeType.Attribute)
{
if (vNode.AttributeType != AttributeType.None)
{
return(null);
}
node = new LazyTreeViewItem();
StackPanel pnl = new StackPanel {
Orientation = Orientation.Horizontal
};
pnl.Children.Add(new TextBlock {
Text = "@" + vNode.LocalName, Foreground = Brushes.Gray
});
if ((vNode.ChildNodes.Count == 0) && !string.IsNullOrEmpty(vNode.Value))
{
pnl.Children.Add(new TextBlock {
Text = ": " + vNode.Value, Foreground = Brushes.Green
});
}
node.Header = pnl;
node.Foreground = Brushes.Brown;
node.ToolTip = vNode.ToDetailsString();
}
else if (vNode.NodeType == NodeType.Element)
{
node = new LazyTreeViewItem();
StackPanel pnl = new StackPanel {
Orientation = Orientation.Horizontal
};
if (string.IsNullOrEmpty(vNode.TypeName))
{
pnl.Children.Add(new TextBlock {
Text = vNode.LocalName, Foreground = Brushes.White
});
}
else
{
pnl.Children.Add(new TextBlock {
Text = vNode.LocalName + " [" + vNode.TypeName + "]", Foreground = Brushes.White
});
}
if ((vNode.ChildNodes.Count == 0) && !string.IsNullOrEmpty(vNode.Value))
{
pnl.Children.Add(new TextBlock {
Text = ": " + vNode.Value.Trim(), Foreground = Brushes.Green
});
}
node.Header = pnl;
node.ToolTip = vNode.ToDetailsString();
}
node.Tag = vNode;
if (vNode.Attributes.Count > 0 || vNode.ChildNodes.Count > 0)
{
//to make item expandable
node.Items.Add(new LazyTreeViewItem());
}
node.ExpandAction += (thisNode) =>
{
//check if child is DUMMY and expand...
if (thisNode.Items.Count == 1 && ((LazyTreeViewItem)thisNode.Items[0]).IsStillLazy)
{
thisNode.Items.Clear();
foreach (ViewerNode t in vNode.Attributes)
{
TreeViewItem tvi = BuildTreeView(t, filter);
if (tvi != null)
{
thisNode.Items.Add(tvi);
}
}
foreach (ViewerNode t in vNode.ChildNodes)
{
TreeViewItem tvi = BuildTreeView(t, filter);
if (tvi != null)
{
thisNode.Items.Add(tvi);
}
}
}
};
if (filter != null)
{
if (!filter(node))
{
return(node);
}
else
{
return(null);
}
}
return(node);
}
return(null);
}
