/// <summary>
/// Retrieves the tree node that is at the specified vertical location.
/// </summary>
/// <returns>The TreeNode at the specified location, in tree view coordinates.</returns>
/// <remarks>
/// <para>You can pass the MouseEventArgs.X and MouseEventArgs.Y coordinates of the
/// MouseDown event as the x and y parameters.</para>
/// </remarks>
/// <param name="y">The Y position to evaluate and retrieve the node from.</param>
/// <param name="tree">Tree control to find node at.</param>
/// <param name="paintedOnly">Enumerates rendered nodes only.</param>
public static NodeHitTestInfo GetNodeAt(AdvTree tree, int y, bool paintedOnly, bool isUserInterfaceHitTest)
{
NodeHitTestInfo info = new NodeHitTestInfo();
if (tree.Nodes.Count == 0 || !tree.DisplayRectangle.Contains(1, y) && tree.Zoom == 1)
return info;
Point displayOffset = tree.NodeDisplay.Offset;
// Enumerate painted node first
if (tree.DisplayRectangle.Contains(1, y))
{
ArrayList paintedNodes = tree.NodeDisplay.PaintedNodes;
foreach (Node paintedNode in paintedNodes)
{
if (!paintedNode.IsDisplayed && !(paintedNode.Expanded && paintedNode.HasColumns)) continue;
Rectangle r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.NodeBounds, paintedNode, displayOffset);
if (y >= r.Y && y <= r.Bottom)
{
info.NodeAt = paintedNode;
return info;
}
else if(NodeDisplay.HasColumnsVisible(paintedNode))
{
Rectangle headerBounds = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ColumnsBounds, paintedNode, displayOffset);
if (y >= headerBounds.Y && y <= headerBounds.Bottom)
{
info.ColumnsAt = paintedNode.NodesColumns;
return info;
}
}
}
}
if (paintedOnly) return info;
Node node = tree.Nodes[0];
Node retNode = null;
if (tree.DisplayRootNode != null)
node = tree.DisplayRootNode;
while (node != null)
{
Rectangle r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.NodeBounds, node, displayOffset);
if (node.Visible && y >= r.Y && y <= r.Bottom)
{
retNode = node;
break;
}
else if (NodeDisplay.HasColumnsVisible(node))
{
Rectangle headerBounds = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ColumnsBounds, node, displayOffset);
if (y >= headerBounds.Y && y <= headerBounds.Bottom)
{
info.ColumnsAt = node.NodesColumns;
return info;
}
}
if (isUserInterfaceHitTest && (r.Bottom + 16 < y || r.Y + 16 > y))
break;
r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ChildNodeBounds, node, displayOffset);
if (!(y >= r.Y && y <= r.Bottom))
node = GetNextVisibleSibling(node);
else
node = node.NextVisibleNode;
}
info.NodeAt = retNode;
return info;
}
/// <summary>
/// Retrieves the tree node that is at the specified location.
/// </summary>
/// <returns>The TreeNode at the specified location, in tree view coordinates.</returns>
/// <remarks>
/// <para>You can pass the MouseEventArgs.X and MouseEventArgs.Y coordinates of the
/// MouseDown event as the x and y parameters.</para>
/// </remarks>
/// <param name="tree">Tree control to find node at.</param>
/// <param name="x">The X position to evaluate and retrieve the node from.</param>
/// <param name="y">The Y position to evaluate and retrieve the node from.</param>
/// <param name="paintedOnly">Enumerates rendered nodes only.</param>
public static NodeHitTestInfo GetNodeAt(AdvTree tree, int x, int y, bool paintedOnly, bool isUserInterfaceHitTest)
{
NodeHitTestInfo info = new NodeHitTestInfo();
if (tree.Nodes.Count == 0 || !tree.DisplayRectangle.Contains(x, y) && tree.Zoom == 1)
return info;
Node node=tree.Nodes[0];
Node retNode=null;
bool displayRootSet = false;
if (tree.DisplayRootNode != null)
{
node = tree.DisplayRootNode;
displayRootSet = true;
}
Point displayOffset = tree.NodeDisplay.Offset;
// Enumerate painted nodes first
if(tree.DisplayRectangle.Contains(x, y))
{
ArrayList paintedNodes = tree.NodeDisplay.PaintedNodes;
foreach (Node paintedNode in paintedNodes)
{
if (!paintedNode.IsDisplayed) continue;
Rectangle r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.NodeBounds, paintedNode, displayOffset);
if (r.Contains(x, y))
{
info.NodeAt = paintedNode;
return info;
}
else if (NodeDisplay.HasColumnsVisible(paintedNode))
{
Rectangle headerBounds = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ColumnsBounds, paintedNode, displayOffset);
if (headerBounds.Contains(x, y))
{
info.ColumnsAt = paintedNode.NodesColumns;
return info;
}
}
}
}
if (paintedOnly) return info;
while (node != null)
{
Rectangle r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.NodeBounds, node, displayOffset);
if (r.Contains(x, y))
{
retNode = node;
break;
}
else if (NodeDisplay.HasColumnsVisible(node))
{
Rectangle headerBounds = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ColumnsBounds, node, displayOffset);
if (headerBounds.Contains(x, y))
{
info.ColumnsAt = node.NodesColumns;
return info;
}
}
if (r.Y > y) break;
r = NodeDisplay.GetNodeRectangle(eNodeRectanglePart.ChildNodeBounds, node, displayOffset);
if (!r.Contains(x, y))
node = GetNextVisibleSibling(node);
else
node = node.NextVisibleNode;
if (displayRootSet && !IsChildNode(tree.DisplayRootNode, node)) break;
}
info.NodeAt = retNode;
return info;
}