LayoutElement.GetParentByType<T>() Method

Returns the parent layout element of the type designated by the specified generic type parameter.

Namespace: DevExpress.XtraRichEdit.API.Layout

Assembly: DevExpress.RichEdit.v19.1.Core.dll

Declaration

C#

T GetParentByType<T>()
    where T : class

VB.NET

Function GetParentByType(Of T As Class) As T

Type Parameters

Name
T

Returns

Type	Description
T	The layout element of the type designated by the specified generic type parameter.

Remarks

Gets the element of the specified type which is higher in the layout hierarchy.

Example

Note

A complete sample project is available at https://github.com/DevExpress-Examples/layout-api-simple-example-t245818

MyDocumentLayoutVisitor.vb

Friend Class MyDocumentLayoutVisitor
    Inherits DevExpress.XtraRichEdit.API.Layout.LayoutVisitor

    Protected Overrides Sub VisitRow(ByVal row As DevExpress.XtraRichEdit.API.Layout.LayoutRow)
        If row.GetParentByType(Of DevExpress.XtraRichEdit.API.Layout.LayoutPageArea)() IsNot Nothing Then
            System.Diagnostics.Debug.WriteLine("This row is located at X: {0}, Y: {1}, related range starts at {2}", row.Bounds.X, row.Bounds.Y, row.Range.Start)
        End If
        ' Call the base VisitRow method to walk down the tree to the child elements of the Row.
        ' If you don't need them, comment out the next line. 
        MyBase.VisitRow(row)
    End Sub

    Protected Overrides Sub VisitPage(ByVal page As DevExpress.XtraRichEdit.API.Layout.LayoutPage)
        System.Diagnostics.Debug.WriteLine("Visiting page {0}", page.Index +1)
        MyBase.VisitPage(page)
    End Sub


End Class

MyDocumentLayoutVisitor.cs

class MyDocumentLayoutVisitor : DevExpress.XtraRichEdit.API.Layout.LayoutVisitor
{
    protected override void VisitRow(DevExpress.XtraRichEdit.API.Layout.LayoutRow row)
    {
        if (row.GetParentByType<DevExpress.XtraRichEdit.API.Layout.LayoutPageArea>() != null)
            System.Diagnostics.Debug.WriteLine("This row is located at X: {0}, Y: {1}, related range starts at {2}",
                row.Bounds.X, row.Bounds.Y, row.Range.Start);
        // Call the base VisitRow method to walk down the tree to the child elements of the Row.
        // If you don't need them, comment out the next line. 
        base.VisitRow(row);
    }

    protected override void VisitPage(DevExpress.XtraRichEdit.API.Layout.LayoutPage page)
    {
        System.Diagnostics.Debug.WriteLine("Visiting page {0}", page.Index +1);
        base.VisitPage(page);
    }


    }