Hello,

I have been investigating into your issue and I do understand your concern. In order to achieve the desired behavior could re-template the xamCheckEditors default template, by placing the new modified ControlTemplate in a style. This style will be triggered when the Value property becomes Null. Since the default template is using a ValueEditorCheckBox,  we can bind the IsChecked property of that control  to the corresponding parents property including one important feature– we can put a value converter in order to catch the null value and return false. With that custom technique the controls Value property will remains Null, but the inner ValueEditorCheckBox would not be checked. That means the xamCheckEditor will never show the blue square that marks the Indeterminate state.

Here is a corresponding sample:

Xaml part

<local:TriggersConverter x:Key="someRes"/>

  <Style TargetType="{x:Type igEditors:XamCheckEditor}">

                <Style.Triggers>

                    <Trigger Property="Value" Value="{x:Null}">

                        <Setter Property="Template">

                            <Setter.Value>

                                <ControlTemplate TargetType="{x:Type igEditors:XamCheckEditor}">

                                    <Border x:Name="MainBorder"

                                            BorderBrush="{TemplateBinding BorderBrush}"

                                            BorderThickness="{TemplateBinding BorderThickness}"

                                               Background="{TemplateBinding Background}">

                                        <!-- SSP 10/3/07 BR25672 Added Padding="{TemplateBinding Padding}" to the ValueEditorCheckBox below -->

                                        <igEditors:ValueEditorCheckBox x:Name="PART_FocusSite"

                                                      IsChecked="{Binding RelativeSource={RelativeSource TemplatedParent}, Converter={StaticResource kkk}, Path=IsChecked, Mode=TwoWay, UpdateSourceTrigger=PropertyChanged}"

                                                      IsThreeState="{TemplateBinding IsThreeState}"

                                                      HorizontalAlignment="{TemplateBinding HorizontalContentAlignment}"

                                                      VerticalAlignment="{TemplateBinding VerticalContentAlignment}"

                                                      Margin="{TemplateBinding Padding}"/>

                                 </Border>

                                </ControlTemplate>

                            </Setter.Value>

                        </Setter>

                    </Trigger>

                </Style.Triggers>

            </Style>

Code behind part:

public class TriggersConverter : IValueConverter

    {

        public object Convert(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            if (value == null)

            {

                return false;

            }

            return true;

        }

        public object ConvertBack(object value, Type targetType, object parameter, System.Globalization.CultureInfo culture)

        {

            return value;

        }

    }

In case of other concerns on that matter please do not hesitate to ask.

Sincerely,

Ekaterina

Developer Support Engineer

Infragistics Inc.

www.infragistics.com/support