private void UpdateContainerHelper()
{
// Keep a backup of the template element and initialize the
// new helper with it.
ItemsControl childrenItemsControl = null;
if (_containerHelper != null)
{
childrenItemsControl = _containerHelper.ChildrenItemsControl;
_containerHelper.ClearHelper();
if (_containerHelper is ObjectContainerHelperBase)
{
// If the actual AdvancedOptionMenu is the default menu for selected object,
// remove it. Otherwise, it is a custom menu provided by the user.
// This "default" menu is only valid for the SelectedObject[s] case. Otherwise,
// it is useless and we must remove it.
var defaultAdvancedMenu = (ContextMenu)this.FindResource(PropertyGrid.SelectedObjectAdvancedOptionsMenuKey);
if (this.AdvancedOptionsMenu == defaultAdvancedMenu)
{
this.AdvancedOptionsMenu = null;
}
}
}
_containerHelper = new ObjectContainerHelper(this, SelectedObject);
((ObjectContainerHelper)_containerHelper).GenerateProperties();
_containerHelper.ChildrenItemsControl = childrenItemsControl;
// Since the template will bind on this property and this property
// will be different when the property parent is updated.
this.Notify(this.PropertyChanged, () => this.Properties);
}
internal PropertyItemBase()
{
_containerHelper = new ObjectContainerHelper(this, null);
this.GotFocus += new RoutedEventHandler(PropertyItemBase_GotFocus);
AddHandler(PropertyItemsControl.PreparePropertyItemEvent, new PropertyItemEventHandler(OnPreparePropertyItemInternal));
AddHandler(PropertyItemsControl.ClearPropertyItemEvent, new PropertyItemEventHandler(OnClearPropertyItemInternal));
}
public override void ClearChildrenPropertyItem(PropertyItemBase propertyItem, object item)
{
if (propertyItem.Editor != null &&
ContainerHelperBase.GetIsGenerated(propertyItem.Editor))
{
propertyItem.Editor = null;
}
base.ClearChildrenPropertyItem(propertyItem, item);
}
public override void PrepareChildrenPropertyItem(PropertyItemBase propertyItem, object item)
{
_isPreparingItemFlag = true;
base.PrepareChildrenPropertyItem(propertyItem, item);
if (propertyItem.Editor == null)
{
FrameworkElement editor = this.GenerateChildrenEditorElement((PropertyItem)propertyItem);
if (editor != null)
{
// Tag the editor as generated to know if we should clear it.
ContainerHelperBase.SetIsGenerated(editor, true);
propertyItem.Editor = editor;
}
}
_isPreparingItemFlag = false;
}