protected DataGridItemProperty(DataGridItemProperty template)
: base(template)
{
// this.IsAutoCreated = false, after a clone, we consider the ItemProperty not AutoCreated.
m_propertyDescriptor = template.m_propertyDescriptor;
m_valueXPath = template.m_valueXPath;
m_valuePath = template.m_valuePath;
}
public PropertyDescriptorFromItemProperty(DataGridItemProperty dataGridItemProperty)
: base(dataGridItemProperty)
{
m_propertyDescriptorForValueChanged = dataGridItemProperty.PropertyDescriptor;
}
internal override void SetUnspecifiedPropertiesValues(DataGridItemPropertyCollection itemPropertyCollection)
{
// ContainingCollection.ItemType and ContainingCollection.DefaultItemProperties can be null at first when this is
// the ItemProperties of a DetailGrid.
// the SetUnspecifiedPropertiesValues will be recall when both this.ItemType and this.DefaultItemProperties are affected.
if (itemPropertyCollection == null)
{
return;
}
DataGridItemProperty defaultItemProperty = null;
bool itemIsNequeoDataRow = (itemPropertyCollection.ItemType != null) ? typeof(DataRow).IsAssignableFrom(itemPropertyCollection.ItemType) : false;
if ((string.IsNullOrEmpty(this.ValueXPath)) &&
(string.IsNullOrEmpty(this.ValuePath)) &&
(this.PropertyDescriptor == null))
{
if (itemIsNequeoDataRow)
{
this.PropertyDescriptor = new UnboundDataRowPropertyDescriptor(this.Name, this.DataType);
}
else
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
if (defaultItemProperty == null)
{
if (this.Name == ".")
{
this.SetPropertyDescriptor(new SelfPropertyDescriptor(this.DataType));
this.SetValuePath(".");
this.SetIsReadOnly(true);
this.SetOverrideReadOnlyForInsertion(false);
}
else if (itemPropertyCollection.DefaultItemProperties != null)
{
// I have to add this particular exception case to make sure that when the ItemProperty is "re-normalized" when the first DataGridCollectionView
// is created for it, then the ValuePath is still null or empty (allowing it to be re-normalized)
this.SetValuePath(this.Name);
}
}
else
{
this.SetPropertyDescriptor(defaultItemProperty.PropertyDescriptor);
this.SetValuePath(defaultItemProperty.ValuePath);
this.SetValueXPath(defaultItemProperty.ValueXPath);
}
}
}
if (this.DataType == null)
{
//only try to affect the DataType if the DefaultItemProperties were set. (will not be the case when XAML parsing DetailDescriptions)
if (itemPropertyCollection.DefaultItemProperties != null)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty == null)
{
throw new InvalidOperationException("An attempt was made to add an item (" + this.Name + ") without specifying its data type.");
}
this.SetDataType(defaultItemProperty.DataType);
}
}
if (string.IsNullOrEmpty(this.Title))
{
if (itemIsNequeoDataRow)
{
this.Title = this.Name;
}
else
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty == null)
{
this.Title = this.Name;
}
else
{
this.Title = defaultItemProperty.Title;
}
}
}
if (!this.IsReadOnly)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if (defaultItemProperty != null)
{
this.SetIsReadOnly(defaultItemProperty.IsReadOnly);
}
}
if (this.OverrideReadOnlyForInsertion == null)
{
//only try to affect the DataType if the DefaultItemProperties were set. (will not be the case when XAML parsing DetailDescriptions)
if (itemPropertyCollection.DefaultItemProperties != null)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
this.SetOverrideReadOnlyForInsertion((defaultItemProperty != null) && (defaultItemProperty.OverrideReadOnlyForInsertion.HasValue)
? defaultItemProperty.OverrideReadOnlyForInsertion.Value
: false);
}
}
if ((!string.IsNullOrEmpty(this.ValueXPath)) && (string.IsNullOrEmpty(this.ValuePath)))
{
this.SetValuePath("InnerText");
}
bool foreignKeyDescriptionIsNull = (this.ForeignKeyDescription == null);
bool foreignKeyDescriptionItemsSourceIsNull = false;
if (!foreignKeyDescriptionIsNull)
{
foreignKeyDescriptionItemsSourceIsNull = (this.ForeignKeyDescription.ItemsSource == null);
}
// Update the ForeignKeyDescription if not set
if (foreignKeyDescriptionIsNull || foreignKeyDescriptionItemsSourceIsNull)
{
if (defaultItemProperty == null)
{
defaultItemProperty = itemPropertyCollection.FindDefaultItemProperty(this.Name) as DataGridItemProperty;
}
if ((defaultItemProperty != null) && (defaultItemProperty.ForeignKeyDescription != null))
{
if (foreignKeyDescriptionIsNull)
{
this.SetForeignKeyDescription(defaultItemProperty.ForeignKeyDescription);
}
else
{
if (foreignKeyDescriptionItemsSourceIsNull)
{
this.ForeignKeyDescription.ItemsSource = defaultItemProperty.ForeignKeyDescription.ItemsSource;
}
}
}
}
}
