Thanks!

Hi,

Yeah, it looks like there is no separate element for the dropdown arrow, so you would have to use a DrawFilter instead of CreationFilter to stop the SplitButtonUIElement from drawing the arrow.

This is a bit tricky, too, because the drodpown arrow is drawn using operating system themes, so you would have to turn off Themes and also cancel the BeforeDrawForeground phase of the drawing.

Turning off themes can be done via the appearance:

this.ultraDropDownButton1.Appearance.ThemedElementAlpha = Alpha.Transparent;

And the DrawFilter would look something like this:

    public class MyDrawFilter : IUIElementDrawFilter
    {
        #region IUIElementDrawFilter Members

        public bool DrawElement(DrawPhase drawPhase, ref UIElementDrawParams drawParams)
        {
            return true;
        }

        public DrawPhase GetPhasesToFilter(ref UIElementDrawParams drawParams)
        {
            if (drawParams.Element is SplitButtonUIElement)
                return DrawPhase.BeforeDrawForeground;

            return DrawPhase.None;
        }

        #endregion
    }

Thanks for the reply Mike.  I ended up using an UltraButton and handling the events myself.  For my instruction though, perhaps you'd take a look at the following:

I attempted to use a creation filter, but there doesn't appear to be a good way to do this with the UltraDropdownButton control.  Or at least, if there is, I'm missing it.

I first tried:

Friend Class NoDropDownButtonCreationFilter

    Implements Infragistics.Win.IUIElementCreationFilter

    Public Sub AfterCreateChildElements(parent As Infragistics.Win.UIElement) Implements Infragistics.Win.IUIElementCreationFilter.AfterCreateChildElements

        Dim editorElement As Infragistics.Win.Misc.DropDownButtonControlUIElement = CType(parent, Infragistics.Win.Misc.DropDownButtonControlUIElement)

        If editorElement IsNot Nothing Then

            Dim dropdownButtonElement As Infragistics.Win.DropDownButtonUIElement = CType(editorElement.GetDescendant(GetType(DropDownButtonUIElement)), DropDownButtonUIElement)

            Dim textElement As Infragistics.Win.EditorWithTextUIElement = CType(editorElement.GetDescendant(GetType(EditorWithTextUIElement)), EditorWithTextUIElement)

            If dropdownButtonElement IsNot Nothing AndAlso editorElement.ChildElements.Contains(dropdownButtonElement) Then

                editorElement.ChildElements.Remove(dropdownButtonElement)

                If textElement IsNot Nothing Then

                    textElement.Rect = editorElement.RectInsideBorders

                End If

            End If

        End If

    End Sub

    Public Function BeforeCreateChildElements(parent As Infragistics.Win.UIElement) As Boolean Implements Infragistics.Win.IUIElementCreationFilter.BeforeCreateChildElements

        Return False

    End Function

End Class

However, the parent  only has one ChildElement which is Infragistics.Win.Misc.SplitButtonUIElement.  There are no ChildElements on that class so I see no way to remove one of them from the collection.  Do you have any suggestions about where to hide the dropdownbutton in this case?