CustomDrawRowHeaderIndentEventArgs.CategoryIndents Property

Gets a collection of category indents to be painted.

Namespace: DevExpress.XtraVerticalGrid.Events

Assembly: DevExpress.XtraVerticalGrid.v24.1.dll

NuGet Packages: DevExpress.Win.Navigation, DevExpress.Win.VerticalGrid

Declaration

C#

public Indents CategoryIndents { get; }

VB.NET

Public ReadOnly Property CategoryIndents As Indents

Property Value

Type	Description
DevExpress.XtraVerticalGrid.ViewInfo.Indents	An Indents object representing the collection of painted category indents.

Remarks

Each row header within a vertical grid contains indents. Indents are used to represent the data within the control in a tree like stucture. Indents are subdivided into two types (see the image below):

• row indents which belong to editor or multi-editor rows;
• category indents which belong only to category rows.

The CategoryIndents property provides access to the collection of category indents to be painted. Individual indents can be accessed using index notation.

Example

The following sample code handles the VGridControlBase.CustomDrawRowHeaderCell and VGridControlBase.CustomDrawRowHeaderIndent events to custom paint the focused row header and its indents. If the focused row is a category row, it is painted in the default manner.

The image below shows the result.

C#

using System.Drawing.Drawing2D;
using DevExpress.XtraVerticalGrid.ViewInfo;
using DevExpress.XtraVerticalGrid.Events;

private void vGridControl1_CustomDrawRowHeaderCell(object sender, 
CustomDrawRowHeaderCellEventArgs e) {
     if(e.Row.XtraRowTypeID != 0 && e.Focused) {
        // Creates the brush which is used to fill the background of row headers.
        using(var backBrush = new LinearGradientBrush(e.Bounds, Color.Orange,
            e.Appearance.BackColor2, LinearGradientMode.Vertical))
            e.Cache.FillRectangle(backBrush, e.Bounds);
        // Paints the row header's caption.
        e.Cache.DrawString(e.Caption, e.Appearance.Font, Brushes.DarkBlue,
            e.CaptionRect, e.Appearance.GetStringFormat());
        // Paints the row header's image.
        e.Cache.DrawImage(imageList1.Images[0], e.ImageRect);
        e.Handled = true;
    }
}

private void vGridControl1_CustomDrawRowHeaderIndent(object sender, 
CustomDrawRowHeaderIndentEventArgs e) {
    VGridControl grid = sender as VGridControl;
    if(e.Row.XtraRowTypeID == 0)
        return;
    if(e.Row == grid.FocusedRow) {
        // Fills the category indent's background.
        foreach(IndentInfo indInfo in e.CategoryIndents)
            using(var categoryIndentBrush = new LinearGradientBrush(indInfo.Bounds,
                    indInfo.Style.BackColor, indInfo.Style.BackColor,
                    LinearGradientMode.Vertical))
                e.Cache.FillRectangle(categoryIndentBrush, indInfo.Bounds);
        // Fills the row indent's background.
        if(e.RowIndents.Count - 1 > -1) {
            for(int i = 0; i < e.RowIndents.Count - 1; i++)
                using(var rowIndentBrush = new LinearGradientBrush(e.RowIndents[i].Bounds,
                        e.RowIndents[i].Style.BackColor, e.RowIndents[i].Style.BackColor2,
                        LinearGradientMode.Vertical))
                    e.Cache.FillRectangle(rowIndentBrush, e.RowIndents[i].Bounds);
            // Creates the brush which is used to fill the background of row indents.
            using(var backBrush = new LinearGradientBrush(e.Bounds, Color.Orange,
            e.Appearance.BackColor2, LinearGradientMode.Vertical))
                e.Cache.FillRectangle(backBrush, e.RowIndents[e.RowIndents.Count - 1].Bounds);
        }
        e.Handled = true;
    }
}

VB.NET

Imports System.Drawing.Drawing2D
Imports DevExpress.XtraVerticalGrid.ViewInfo
Imports DevExpress.XtraVerticalGrid.Events

Private Sub VGridControl1_CustomDrawRowHeaderCell(ByVal sender As Object, _
ByVal e As CustomDrawRowHeaderCellEventArgs) Handles VGridControl1.CustomDrawRowHeaderCell
    If e.Row.XtraRowTypeID <> 0 AndAlso e.Focused Then
        ' Creates the brush which is used to fill the background of row headers.
        Using backBrush = New LinearGradientBrush(e.Bounds, Color.Orange, e.Appearance.BackColor2, LinearGradientMode.Vertical)
            e.Cache.FillRectangle(backBrush, e.Bounds)
        End Using
        ' Paints the row header's caption.
        e.Cache.DrawString(e.Caption, e.Appearance.Font, Brushes.DarkBlue, e.CaptionRect, e.Appearance.GetStringFormat())
        ' Paints the row header's image.
        e.Cache.DrawImage(imageList1.Images(0), e.ImageRect)
        e.Handled = True
    End If
End Sub

Private Sub VGridControl1_CustomDrawRowHeaderIndent(ByVal sender As Object, _
ByVal e As CustomDrawRowHeaderIndentEventArgs) _
Handles VGridControl1.CustomDrawRowHeaderIndent
   Dim grid As VGridControl = TryCast(sender, VGridControl)
    If e.Row.XtraRowTypeID = 0 Then
        Return
    End If
    If e.Row = grid.FocusedRow Then
        ' Fills the category indent's background.
        For Each indInfo As IndentInfo In e.CategoryIndents
            Using categoryIndentBrush = New LinearGradientBrush(indInfo.Bounds, indInfo.Style.BackColor, indInfo.Style.BackColor, LinearGradientMode.Vertical)
                e.Cache.FillRectangle(categoryIndentBrush, indInfo.Bounds)
            End Using
        Next indInfo
        ' Fills the row indent's background.
        If e.RowIndents.Count - 1 > -1 Then
            For i As Integer = 0 To e.RowIndents.Count - 2
                Using rowIndentBrush = New LinearGradientBrush(e.RowIndents(i).Bounds, e.RowIndents(i).Style.BackColor, e.RowIndents(i).Style.BackColor2, LinearGradientMode.Vertical)
                    e.Cache.FillRectangle(rowIndentBrush, e.RowIndents(i).Bounds)
                End Using
            Next i
            ' Creates the brush which is used to fill the background of row indents.
            Using backBrush = New LinearGradientBrush(e.Bounds, Color.Orange, e.Appearance.BackColor2, LinearGradientMode.Vertical)
                e.Cache.FillRectangle(backBrush, e.RowIndents(e.RowIndents.Count - 1).Bounds)
            End Using
        End If
        e.Handled = True
    End If
End Sub