/// <summary>
/// Descrides the Drop event of the RowDragDroController and handles the drop items from ListView
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RowDragDropController_Drop(object sender, Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDropEventArgs e)
{
if (e.IsFromOutSideSource)
{
var item = e.Data.GetData("Nodes") as ObservableCollection <TreeViewNode>;
var treeViewNode = item[0] as TreeViewNode;
var record = treeViewNode.Content as PersonInfo;
var dropPosition = e.DropPosition.ToString();
var newItem = new PersonInfo();
IList sourceCollection = null;
if (e.TargetNode != null)
{
var rowIndex = AssociatedObject.treeGrid.ResolveToRowIndex(e.TargetNode.Item);
int nodeIndex = (int)rowIndex;
if (dropPosition != "None" && rowIndex != -1)
{
var treeNode = AssociatedObject.treeGrid.GetNodeAtRowIndex(rowIndex);
if (treeNode == null)
{
return;
}
if (AssociatedObject.treeGrid.View is TreeGridNestedView)
{
var data = treeNode.Item;
AssociatedObject.treeGrid.SelectionController.SuspendUpdates();
var itemIndex = -1;
TreeNode parentNode = null;
if (dropPosition == "DropBelow" || dropPosition == "DropAbove")
{
parentNode = treeNode.ParentNode;
newItem = new PersonInfo()
{
FirstName = record.FirstName, LastName = record.LastName, ID = record.ID, DOB = record.DOB, Children = record.Children
};
}
else if (dropPosition == "DropAsChild")
{
if (!treeNode.IsExpanded)
{
AssociatedObject.treeGrid.ExpandNode(treeNode);
}
parentNode = treeNode;
newItem = new PersonInfo()
{
FirstName = record.FirstName, LastName = record.LastName, ID = record.ID, DOB = record.DOB, Children = record.Children
};
}
if (dropPosition == "DropBelow" || dropPosition == "DropAbove")
{
if (treeNode.ParentNode != null)
{
var collection = AssociatedObject.treeGrid.View.GetPropertyAccessProvider().GetValue(treeNode.ParentNode.Item, AssociatedObject.treeGrid.ChildPropertyName) as IEnumerable;
sourceCollection = GetSourceListCollection(collection);
}
else
{
sourceCollection = GetSourceListCollection(AssociatedObject.treeGrid.View.SourceCollection);
}
itemIndex = sourceCollection.IndexOf(data);
if (dropPosition == "DropBelow")
{
itemIndex += 1;
}
}
else if (dropPosition == "DropAsChild")
{
var collection = AssociatedObject.treeGrid.View.GetPropertyAccessProvider().GetValue(data, AssociatedObject.treeGrid.ChildPropertyName) as IEnumerable;
sourceCollection = GetSourceListCollection(collection);
if (sourceCollection == null)
{
var list = data.GetType().GetProperty(AssociatedObject.treeGrid.ChildPropertyName).PropertyType.CreateNew() as IList;
if (list != null)
{
AssociatedObject.treeGrid.View.GetPropertyAccessProvider().SetValue(treeNode.Item, AssociatedObject.treeGrid.ChildPropertyName, list);
sourceCollection = list;
}
}
itemIndex = sourceCollection.Count;
}
sourceCollection.Insert(itemIndex, newItem);
AssociatedObject.treeGrid.SelectionController.ResumeUpdates();
(AssociatedObject.treeGrid.SelectionController as TreeGridRowSelectionController).RefreshSelection();
}
if (treeViewNode.Level == 0)
{
(AssociatedObject.treeView.ItemsSource as ObservableCollection <PersonInfo>).Remove(record as PersonInfo);
}
else
{
((treeViewNode.ParentNode.Content as PersonInfo).Children as ObservableCollection <PersonInfo>).Remove(treeViewNode.Content as PersonInfo);
}
}
}
else
{
sourceCollection = GetSourceListCollection(AssociatedObject.treeGrid.View.SourceCollection);
sourceCollection.Insert(0, record);
(AssociatedObject.treeView.ItemsSource as ObservableCollection <PersonInfo>).Remove(record as PersonInfo);
}
}
}
/// <summary>
/// Descrides the Drop event of the RowDragDroController and handles the drop items from ListView
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void RowDragDropController_Drop(object sender, Syncfusion.UI.Xaml.TreeGrid.TreeGridRowDropEventArgs e)
{
if (e.IsFromOutSideSource)
{
var item = e.Data.GetData("ListViewRecords") as ObservableCollection <object>;
var record = item[0] as EmployeeInfo;
var dropPosition = e.DropPosition.ToString();
var newItem = new EmployeeInfo();
var rowIndex = AssociatedObject.sfTreeGrid.ResolveToRowIndex(e.TargetNode.Item);
int nodeIndex = (int)rowIndex;
if (dropPosition != "None" && rowIndex != -1)
{
if (AssociatedObject.sfTreeGrid.View is TreeGridSelfRelationalView)
{
var treeNode = AssociatedObject.sfTreeGrid.GetNodeAtRowIndex(rowIndex);
if (treeNode == null)
{
return;
}
var data = treeNode.Item;
AssociatedObject.sfTreeGrid.SelectionController.SuspendUpdates();
var itemIndex = -1;
TreeNode parentNode = null;
if (dropPosition == "DropBelow" || dropPosition == "DropAbove")
{
parentNode = treeNode.ParentNode;
if (parentNode == null)
{
newItem = new EmployeeInfo()
{
FirstName = record.FirstName, LastName = record.LastName, ID = record.ID, Salary = record.Salary, Title = record.Title, ReportsTo = -1
}
}
;
else
{
var parentkey = parentNode.Item as EmployeeInfo;
newItem = new EmployeeInfo()
{
FirstName = record.FirstName, LastName = record.LastName, ID = record.ID, Salary = record.Salary, Title = record.Title, ReportsTo = parentkey.ID
};
}
}
else if (dropPosition == "DropAsChild")
{
if (!treeNode.IsExpanded)
{
AssociatedObject.sfTreeGrid.ExpandNode(treeNode);
}
parentNode = treeNode;
var parentkey = parentNode.Item as EmployeeInfo;
newItem = new EmployeeInfo()
{
FirstName = record.FirstName, LastName = record.LastName, ID = record.ID, Salary = record.Salary, Title = record.Title, ReportsTo = parentkey.ID
};
}
IList sourceCollection = null;
if (dropPosition == "DropBelow" || dropPosition == "DropAbove")
{
if (treeNode.ParentNode != null)
{
var collection = AssociatedObject.sfTreeGrid.View.GetPropertyAccessProvider().GetValue(treeNode.ParentNode.Item, AssociatedObject.sfTreeGrid.ChildPropertyName) as IEnumerable;
sourceCollection = GetSourceListCollection(collection);
}
else
{
sourceCollection = GetSourceListCollection(AssociatedObject.sfTreeGrid.View.SourceCollection);
}
itemIndex = sourceCollection.IndexOf(data);
if (dropPosition == "DropBelow")
{
itemIndex += 1;
}
}
else if (dropPosition == "DropAsChild")
{
var collection = AssociatedObject.sfTreeGrid.View.GetPropertyAccessProvider().GetValue(data, AssociatedObject.sfTreeGrid.ChildPropertyName) as IEnumerable;
sourceCollection = GetSourceListCollection(collection);
if (sourceCollection == null)
{
var list = data.GetType().GetProperty(AssociatedObject.sfTreeGrid.ChildPropertyName).PropertyType.CreateNew() as IList;
if (list != null)
{
AssociatedObject.sfTreeGrid.View.GetPropertyAccessProvider().SetValue(treeNode.Item, AssociatedObject.sfTreeGrid.ChildPropertyName, list);
sourceCollection = list;
}
}
itemIndex = sourceCollection.Count;
}
sourceCollection.Insert(itemIndex, newItem);
AssociatedObject.sfTreeGrid.SelectionController.ResumeUpdates();
(AssociatedObject.sfTreeGrid.SelectionController as TreeGridRowSelectionController).RefreshSelection();
e.Handled = true;
}
}
(AssociatedObject.listView.ItemsSource as ObservableCollection <EmployeeInfo>).Remove(record as EmployeeInfo);
}
}