Hello Wurzel,

I am just checking have you been able to resolve your issue? If you still need any assistance on the matter do not hesitate to ask.

Thanks Elena,

Your suggestion worked:

<Style TargetType="{x:Type igEditors:XamComboEditor}">
  <Setter Property="ItemsProvider" Value="{StaticResource SpatialRelationKey}" />
  <Setter Property="EditTemplate">
    <Setter.Value>
      <ControlTemplate TargetType="{x:Type igEditors:XamComboEditor}">
        <UserControls:AnchorUserControl SpatialRelation="{Binding DataItem.Relation, Mode=TwoWay}"></UserControls:AnchorUserControl>
      </ControlTemplate>
    </Setter.Value>
  </Setter>
</Style>

However, I still can’t achieve VisualStudio anchor like behaviour when it rolls down. My user control just sits within a cell and ignores its minimum height and width.
As per the WinForms anchor control when in edit mode I would like to roll down and overlay neighbouring cells instead of being confined to the host grid cell.

Is this possible with WPF/Infragistics, or do I have to find a way to force resize of the grid cell to accommodate?

Hello Wurzel,

After some further investigation on this matter I believe that in your case may be more suitable if you change the appearance of the drop down only, so your user control can be able to overlap the cells below the current one. In order to achieve this you can copy the default XamComboEditor styles in your application and modify only the PART_Popup popup in the "ComboEditor_EditableComboBoxTemplate" by placing by your custom control in it.  PART_Popup is internally used as dropdown. You can find our default templates for XamComboEditor on your computer in the file:

C:\Program Files (x86)\Infragistics\NetAdvantage 2011.2\WPF\DefaultStyles\Editors\EditorsGeneric.xaml

Please let me know if you have any further questions or concerns on this matter.

Hi Elena,

I have tried a few approaches:

1.    Using entire xamComboEnditor style:

<igDP:FieldSettings EditorType="{x:Type igEditors:XamComboEditor}" EditorStyle="{StaticResource AnchorComboEditorComboBoxStyleKey}">
Where style is defined:
<Style x:Key="AnchorComboEditorComboBoxStyleKey" TargetType="{x:Type ComboBox}">
But I can’t get this one working because original style is based on ComboBox so I end up with runtime error not being able to cast Combobox to EditorType

2.    Second option I have tried to use <Style TargetType="{x:Type igEditors:XamComboEditor}"> from within EditorsGeneric.xaml but this never calls my customized PART_Popup within ComboEditor_NonEditableComboBoxTemplate neither ComboEditor_EditableComboBoxTemplate.

I have noticed this binding:
igEditors:XamComboEditor.ComboEditor="{Binding RelativeSource={RelativeSource TemplatedParent}}"
but I am not sure how to replace it or map it to my own custom one.

3.    Third option which worked best - I have replaced PART_Popup content in one of your templates “ComboEditor_EditableComboBoxTemplate” with my own user control. Below is how I have it linked:
<Style.Triggers>
  <Trigger Property="IsEditable" Value="True">
    <Setter Property="IsTabStop" Value="False" />
    <Setter Property="Template" Value="{StaticResource ComboEditor_EditableComboBoxTemplate}" />
  </Trigger>
  <Trigger Property="IsFocusWithin" Value="True">
    <Setter Property="IsDropDownOpen" Value="True" />
  </Trigger>
  <Trigger Property="IsFocusWithin" Value="False">
    <Setter Property="IsDropDownOpen" Value="False" />
  </Trigger>
</Style.Triggers>

Problem here is focus scopes. When I change focus to different ContentPane or different app, the scope stays on popup (within its own focus scope) and the custom user control does not close.

How does do drop down know it is supposed to close? Is there any event I can listen to?

Many thanks,

Wurzel