/// <summary>
/// Allow dragging the source element onto the target
/// </summary>
protected override void OnDraggingBegun(MouseActionEventArgs e)
{
if (mySourceElement == null)
{
mySourceElement = ElementFromShape <ORMModelElement>(MouseDownHitShape);
}
base.OnDraggingBegun(e);
} /// <summary>
/// <summary>
/// Get the source object type or role after the
/// base class sets the source shape
/// </summary>
/// <param name="e">MouseActionEventArgs</param>
protected override void OnClicked(MouseActionEventArgs e)
{
base.OnClicked(e);
if (mySourceElement == null)
{
mySourceElement = ElementFromShape <ORMModelElement>(MouseDownHitShape);
}
}
private CustomProperty FindCustomProperty(ORMModelElement modelElement)
{
if (modelElement != null)
{
foreach (ModelElement extensionElement in modelElement.ExtensionCollection)
{
CustomProperty customProperty = extensionElement as CustomProperty;
if (customProperty != null && customProperty.CustomPropertyDefinition == this.customPropertyDefinition)
{
return(customProperty);
}
}
}
return(null);
}
public sealed override void ResetValue(object component)
{
ORMModelElement modelElement = EditorUtility.ResolveContextInstance(component, false) as ORMModelElement;
System.Diagnostics.Debug.Assert(modelElement != null);
CustomProperty customProperty = FindCustomProperty(modelElement);
if (customProperty != null)
{
using (Transaction transaction = this.StartTransaction(modelElement))
{
customProperty.Delete();
transaction.Commit();
}
}
}
public sealed override void SetValue(object component, object value)
{
CustomPropertyDefinition customPropertyDefinition = this.customPropertyDefinition;
ORMModelElement modelElement = EditorUtility.ResolveContextInstance(component, false) as ORMModelElement;
System.Diagnostics.Debug.Assert(modelElement != null);
CustomProperty customProperty = FindCustomProperty(modelElement);
using (Transaction transaction = this.StartTransaction(modelElement))
{
if (customProperty != null)
{
if (!object.Equals(customProperty.Value, value))
{
if (value == null || object.Equals(customPropertyDefinition.DefaultValue, value))
{
customProperty.Delete();
}
else
{
customProperty.Value = value;
}
}
}
else if (value != null && !object.Equals(customPropertyDefinition.DefaultValue, value))
{
customProperty = new CustomProperty(modelElement.Partition, new PropertyAssignment(CustomProperty.ValueDomainPropertyId, value));
customProperty.CustomPropertyDefinition = customPropertyDefinition;
modelElement.ExtensionCollection.Add(customProperty);
}
if (transaction.HasPendingChanges)
{
transaction.Commit();
}
}
}
private Transaction StartTransaction(ORMModelElement modelElement)
{
return(modelElement.Store.TransactionManager.BeginTransaction(ElementPropertyDescriptor.GetSetValueTransactionName(this.customPropertyDefinition.Name)));
}
private void Reset()
{
mySourceElement = null;
myEmulateDrag = false;
}