Imports DevExpress.XtraTreeList
Imports DevExpress.XtraTreeList.Columns
Imports DevExpress.XtraTreeList.Nodes.Operations
Imports DevExpress.XtraTreeList.Nodes
Imports DevExpress.XtraSplashScreen
Imports System.Threading

Public Class frmNodeNavigation
    Dim DTNODES As DataTable
    Private RunningTask As Task
    Private RunningTaskTokenSource As New CancellationTokenSource
    Private RunningTaskToken = RunningTaskTokenSource.Token
    Private Sub frmNodeNavigation_Load(sender As Object, e As EventArgs) Handles Me.Load

        Load_nodes()
    End Sub
    Async Function Load_nodes() As Threading.Tasks.Task
        Dim oHandle = SplashScreenManager.ShowOverlayForm(Me)
        Try

            Dim oToken = RunningTaskTokenSource.Token
            Dim Sql = String.Format("select T.GUID,T.RECORD_ID, T.NODE_CONFIG_ID,T.NODE_CAPTION,T.ID1, T.BACK_COLOR,T.PARENT_GUID from VWPMO_STRUCTURE_NODES T INNER JOIN VWPMO_CONSTRUCTOR_FORMS T1 ON T.ENTITY_ID = T1.FORM_ID WHERE T1.CONSTRUCT_ID = {0}", 1)
            DTNODES = ClassDatabase.Return_Datatable(Sql, True)
            Sql = String.Format("select T.* from TBPMO_STRUCTURE_NODES_CONFIGURATION T INNER JOIN VWPMO_CONSTRUCTOR_FORMS T1 ON T.ENTITY_ID = T1.FORM_ID WHERE T1.CONSTRUCT_ID = {0}", 1)
            Dim DT_TREEVIEW_CONFIGURATION = ClassDatabase.Return_Datatable(Sql)
            For Each row As DataRow In DT_TREEVIEW_CONFIGURATION.Rows
                Try
                    Dim bimage = row.Item("NODE_IMAGE")
                    If Not IsDBNull(bimage) Then
                        Dim Node_image = ByteArrayToBitmap(bimage)
                        ImageCollection1.AddImage(Node_image, row.Item("GUID"))
                    End If
                Catch ex As Exception

                End Try

            Next



            TreeListDevexpress.DataSource = DTNODES
            TreeListDevexpress.KeyFieldName = "GUID"
            TreeListDevexpress.ParentFieldName = "PARENT_GUID"
            TreeListDevexpress.StateImageList = ImageCollection1
            Try
                TreeListDevexpress.Columns.ColumnByName("colRECORD_ID").Visible = False
            Catch ex As Exception

            End Try
            Try
                TreeListDevexpress.Columns.ColumnByName("colNODE_CONFIG_ID").Visible = False
            Catch ex As Exception

            End Try
            Try
                TreeListDevexpress.Columns.ColumnByName("colBACK_COLOR").Visible = False
                TreeListDevexpress.Columns.ColumnByName("colID1").Visible = False
            Catch ex As Exception

            End Try


        Catch ex As Exception
        Finally
            SplashScreenManager.CloseOverlayForm(oHandle)
        End Try


    End Function

    Private Sub TreeListDevexpress_GetStateImage(sender As Object, e As DevExpress.XtraTreeList.GetStateImageEventArgs)
        Dim Column_Config_ID As DevExpress.XtraTreeList.Columns.TreeListColumn = TreeListDevexpress.Columns("NODE_CONFIG_ID")
        Dim configid = e.Node.GetDisplayText(Column_Config_ID)

        e.Node.StateImageIndex = ImageCollection1.Images.Keys.IndexOf(configid)

    End Sub
    Private Sub TreeListDevexpress_ColumnFilterChanged(sender As Object, e As EventArgs)
        Dim tree As TreeList = TryCast(sender, TreeList)
        Dim filteredColumns As List(Of TreeListColumn) = tree.Columns.Cast(Of TreeListColumn)().Where(Function(c) c.FilterInfo.AutoFilterRowValue IsNot Nothing).ToList()
        If filteredColumns.Count = 0 Then
            tree.CollapseAll()
            Return
        End If

        tree.BeginUpdate()
        For Each col As TreeListColumn In filteredColumns
            Dim op As New CollapseChildrenOperation(col.FilterInfo.AutoFilterRowValue.ToString(), col)
            tree.NodesIterator.DoOperation(op)
        Next col
        tree.EndUpdate()
    End Sub
    Public Class CollapseChildrenOperation
        Inherits TreeListOperation

        Private filterValue As String
        Private column As TreeListColumn

        Public Sub New(ByVal filter As String, ByVal col As TreeListColumn)
            filterValue = filter
            column = col
        End Sub

        Private Function IsNodeMatchFilter(ByVal node As TreeListNode, ByVal column As TreeListColumn) As Boolean
            Return node.GetDisplayText(column).Contains(filterValue)
        End Function
        Public Overrides Sub Execute(ByVal node As TreeListNode)
            If IsNodeMatchFilter(node, column) Then
                node.TreeList.MakeNodeVisible(node)
                CollapseChildren(node)
            End If
        End Sub

        Public Sub CollapseChildren(ByVal node As TreeListNode)
            'node.Visible = true;
            For Each childNode As TreeListNode In node.Nodes
                CollapseChildren(childNode)
            Next childNode
            node.Expanded = False
        End Sub
    End Class

    Private Sub TreeListDevexpress_FocusedNodeChanged(sender As Object, e As FocusedNodeChangedEventArgs) Handles TreeListDevexpress.FocusedNodeChanged
        For Each treeListNode As DevExpress.XtraTreeList.Nodes.TreeListNode In TreeListDevexpress.Selection
            Dim oID = treeListNode.Id
            Dim PID = treeListNode.ParentNode
            Console.WriteLine(oID)
        Next
    End Sub
End Class