How to: Custom Paint the Group's Client Foreground

  • 2 minutes to read

The following sample code handles the NavBarControl.CustomDrawGroupClientForeground event to custom paint the text on a group's client foreground. The group doesn't contain any links initially and thus the NavBarGroup.CalcGroupClientHeight event is handled to specify the group's height.

The image below shows the result.

CustomDraw - GroupClientForeground

using DevExpress.XtraNavBar.ViewInfo;
using DevExpress.XtraNavBar;

readonly Font mailFont = new Font("Verdana", 8, FontStyle.Bold);
readonly Font siteFont = new Font("Verdana", 8);
private void navBarControl1_CustomDrawGroupClientForeground(object sender, 
  CustomDrawObjectEventArgs e) {
    // Identifying the processed group.
    NavGroupClientInfoArgs info = e.ObjectInfo as NavGroupClientInfoArgs;
    if(info.Group.Caption != "Support Info") return;

    // Specifying the text rectangle.    
    Rectangle rect = e.RealBounds;
    rect.Height /= 4;

    // Formatting the output string.
    using(var outStringFormat = new StringFormat()) {
        outStringFormat.Alignment = StringAlignment.Near;
        outStringFormat.LineAlignment = StringAlignment.Center;

        // Painting the first string.
        rect.Offset(0, rect.Height);
        e.Cache.DrawString("E-mail:", mailFont,
            Brushes.Black, rect, outStringFormat);

        // Painting the second string.
        rect.Offset(0, rect.Height);
        e.Cache.DrawString("support@devexpress.com", siteFont,
            Brushes.Black, rect, outStringFormat);
    }

    // Prohibiting default painting.
    e.Handled = true;
}

private void navBarGroup2_CalcGroupClientHeight(object sender, 
  NavBarCalcGroupClientHeightEventArgs e) {
   e.Height = 70;        
}