/// <summary>
/// Get the visible node which matches the given data.
/// </summary>
/// <param name="nodes">nodes collection</param>
/// <param name="data">data.</param>
/// <returns>visible node.</returns>
internal TreeNode GetVisibleNode(TreeNodes nodes, object data)
{
TreeNode treeNode = null;
foreach (var node in nodes)
{
if (node.Item == data)
{
if (!node.IsFiltered)
{
treeNode = node;
}
break;
}
else
{
if (!node.IsFiltered && node.IsExpanded)
{
treeNode = GetVisibleNode(node.ChildNodes, data);
}
if (treeNode != null)
{
break;
}
}
}
return(treeNode);
}
/// <summary>
/// Validates the CheckBoxProperty value by considering selection mode.
/// </summary>
/// <param name="nodes">specifies the tree node collection.</param>
internal void ValidateCheckBoxPropertyValue(TreeNodes nodes)
{
if (string.IsNullOrEmpty(treeGrid.CheckBoxMappingName))
{
return;
}
if (treeGrid.CheckBoxSelectionMode == CheckBoxSelectionMode.Default)
{
return;
}
var list = nodes.Where(i => i.IsChecked == true);
if (treeGrid.SelectionMode == GridSelectionMode.Single)
{
if (list.Count() > 1)
{
throw new Exception("Not possible to have IsChecked as true for more than one item when selection mode is single");
}
if (list.Any() && treeGrid.SelectionController.SelectedRows.Any(r => r.Node != list.FirstOrDefault()))
{
throw new Exception("Not possible to have IsChecked as true for more than one item when selection mode is single");
}
}
else if (treeGrid.SelectionMode == GridSelectionMode.None)
{
if (list.Any())
{
throw new Exception("Not possible to have IsChecked as true for more than one item when selection mode is None");
}
}
}
internal TreeNode FindParentNode(TreeNodes nodes, TreeNode tempNode)
{
TreeNode parentNode = null;
var index = nodes.nodeList.BinarySearch(tempNode, SortComparer);
if (index < 0)
{
foreach (var node in nodes)
{
if (node.IsExpanded || node.ChildNodes.Any())
{
parentNode = FindParentNode(node.ChildNodes, tempNode);
if (parentNode != null)
{
break;
}
}
}
}
else
{
parentNode = nodes[index];
}
return(parentNode);
}
internal TreeNode FindParentNode(TreeNodes nodes, object childValue)
{
TreeNode parentNode = null;
foreach (var node in nodes)
{
var record = node.Item;
object parentValue = propertyAccessProvider.GetValue(record, parentPropertyName);
// if (IsEqual(parentValue, childValue))
if (!IsEqual(SelfRelationRootValue, childValue, true) && IsEqual(parentValue, childValue))
{
parentNode = node;
break;
}
}
if (parentNode == null)
{
foreach (var node in nodes)
{
if (node.IsExpanded || node.ChildNodes.Any())
{
parentNode = FindParentNode(node.ChildNodes, childValue);
if (parentNode != null)
{
break;
}
}
}
}
return(parentNode);
}
internal void AddTreeNodes(TreeNode parentNode, TreeNodes nodes)
{
foreach (var node in nodes)
{
AddNode(parentNode, node, parentNode == null ? Nodes.RootNodes.Count : parentNode.ChildNodes.Count);
}
}
private TreeNodes CopyTreeNodes(TreeNodes treeNodes)
{
var nodes = new TreeNodes();
nodes.nodeList = treeNodes.nodeList.ToList();
nodes.sourceList = treeNodes.sourceList.ToList();
return(nodes);
}
internal TreeNode(object item, int level, bool isExpanded, TreeNode parentNode, Func <TreeGridView> getView)
{
Level = level;
Item = item;
ParentNode = parentNode;
ChildNodes = new TreeNodes();
this.isExpanded = isExpanded;
isDirty = false;
maxLevel = level;
GetView = getView;
}
/// <summary>
/// Finds the next visible node.
/// </summary>
/// <param name="nodes">nodes collection.</param>
/// <param name="node">specific node.</param>
/// <returns>visible node.</returns>
private TreeNode FindNode(TreeNodes nodes, TreeNode node)
{
int nodeIndex = nodes.IndexOf(node);
for (int i = nodeIndex + 1; i < nodes.Count; i++)
{
if (!nodes[i].IsFiltered)
{
return(nodes[i]);
}
}
return(null);
}
public TreeNodesEnumerator(TreeNodes nodes)
{
this.RootNodes = nodes;
this.Helper = new TreeNodesTraversalHelper(RootNodes);
if (nodes.Count == 0)
{
this.next = null;
}
else
{
next = nodes.FirstOrDefault(n => !n.IsFiltered);
}
}
private TreeNodes GetNodeCollection(object parentValue)
{
var nodes = new TreeNodes();
foreach (object record in SourceCollection)
{
object childValue = propertyAccessProvider.GetValue(record, childPropertyName);
if (IsEqual(parentValue, childValue))
{
var node = FindNodefromData(null, record, true);
if (node != null)
{
nodes.Add(node);
}
}
}
return(nodes);
}
private bool FindNode(TreeNode node, TreeNodes nodes)
{
foreach (var treeNode in nodes)
{
if (treeNode.Equals(node))
{
return(true);
}
if (treeNode.IsExpanded)
{
var found = FindNode(node, treeNode.ChildNodes);
if (found)
{
return(true);
}
else
{
continue;
}
}
}
return(false);
}
public TreeNode GetNode(TreeNodes treeNodes, int index)
{
TreeNode node = null;
var nodes = treeNodes.Where(n => !n.IsFiltered);
var actualIndex = index;
foreach (TreeNode rootNode in nodes)
{
if (index <= 0)
{
node = rootNode;
break;
}
else
{
if (rootNode != null && rootNode.IsExpanded)
{
var nodeCount = rootNode.GetYAmountCache();
if (index <= nodeCount - 1)
{
index--;
node = GetNode(rootNode.ChildNodes, index);
break;
}
else
{
index -= nodeCount;
}
}
else
{
index--;
}
}
}
return(node);
}
internal override void ValidateCheckBoxPropertyValue(TreeNodes nodes)
{
TreeGrid.NodeCheckBoxController.ValidateCheckBoxPropertyValue(nodes);
}
public TreeNode()
{
ChildNodes = new TreeNodes();
isDirty = false;
maxLevel = level;
}
public void Dispose()
{
this.RootNodes = null;
}
public TreeNodeCollection()
{
RootNodes = new TreeNodes();
helper = new TreeNodesTraversalHelper(this.RootNodes);
}
private void UpdateNodesOnParentPropertyChange(object sender, TreeNode treeNode, PropertyChangedEventArgs e)
{
if (SelfRelationUpdateMode.HasFlag(SelfRelationUpdateMode.None))
{
return;
}
var parentValue = propertyAccessProvider.GetValue(sender, parentPropertyName);
if (treeNode != null && treeNode.ChildNodes.Any())
{
object childValue = propertyAccessProvider.GetValue(treeNode.ChildNodes[0].Item, childPropertyName);
// checking parent property is changed or not (by comparing child and parent property values)
if (IsEqual(parentValue, childValue))
{
return;
}
}
if ((e == null && SelfRelationUpdateMode.HasFlag(SelfRelationUpdateMode.MoveOnEdit)) || (e != null && SelfRelationUpdateMode.HasFlag(SelfRelationUpdateMode.MoveOnPropertyChange)))
{
TreeNodes nodeCollection = null;
object childValue = propertyAccessProvider.GetValue(sender, childPropertyName);
// if (!IsEqual(parentValue, childValue) || (IsEqual(parentValue, childValue) && SelfRelationRootValue == DependencyProperty.UnsetValue))
if (!IsEqual(parentValue, childValue) || SelfRelationRootValue == DependencyProperty.UnsetValue)
{
// Root value not set case. Remove root nodes if it has child property value equals to parent property value.
nodeCollection = RemoveNodesHavingChildPropertyEqualsToNewParentProperty(parentValue, treeNode);
}
// For property change case only
if (treeNode == null)
{
var childItems = GetChildSourceFromParentID(SelfRelationRootValue, null, true);
foreach (var childItem in childItems)
{
CanAddRootNode(childItem, true);
}
}
else
{
if (SelfRelationRootValue == DependencyProperty.UnsetValue)
{
AddRootNodesFromRemovedParent(treeNode);
// When parent and child value both are same, need to add the child nodes(removed from root nodes) having child property equal to parent property.
if (nodeCollection != null && nodeCollection.Any() && IsEqual(parentValue, childValue) && SelfRelationRootValue == DependencyProperty.UnsetValue)
{
nodeCollection.Remove(treeNode);
if (treeNode.IsExpanded || treeNode.ChildNodes.Any())
{
AddTreeNodes(treeNode, nodeCollection);
}
}
}
else
{
ResetNodes(treeNode, true);
}
// After parent property name is changed, if node is expanded and dont have child node, need to populate child nodes based on new parent property value.
if (treeNode.IsExpanded && !treeNode.ChildNodes.Any())
{
TreeGrid.TreeGridModel.ExpandNode(treeNode, true);
}
else
{
IsChildNodeAvailable(treeNode);
var rowIndex = TreeGrid.ResolveToRowIndex(treeNode);
TreeGrid.UpdateDataRow(rowIndex);
}
}
}
}
public TreeNodesTraversalHelper(TreeNodes Nodes)
{
this.RootNodes = Nodes;
}