/// <summary>
/// Code that handles retrieval of the text to display in ValueConstraintShape.
/// </summary>
public sealed override string GetDisplayText(ShapeElement parentShape)
{
string retval = null;
ValueConstraintShape parentValueConstraintShape = parentShape as ValueConstraintShape;
if (parentShape is ObjectTypeShape)
{
LinkedElementCollection <PresentationElement> pelList = PresentationViewsSubject.GetPresentation(parentShape);
foreach (ShapeElement pel in pelList)
{
ValueConstraintShape valueConstraintShape = pel as ValueConstraintShape;
if (valueConstraintShape != null)
{
parentValueConstraintShape = valueConstraintShape;
break;
}
}
}
if (parentValueConstraintShape == null)
{
retval = base.GetDisplayText(parentShape);
}
else
{
retval = parentValueConstraintShape.DisplayText;
}
return(retval);
}
/// <summary>
/// ChangeRule: typeof(ValueConstraintShape), FireTime=TopLevelCommit, Priority=DiagramFixupConstants.ResizeParentRulePriority;
/// </summary>
private static void ValueConstraintShapeDisplayChangedRule(ElementPropertyChangedEventArgs e)
{
Guid propertyId = e.DomainProperty.Id;
if (propertyId == ValueConstraintShape.MaximumDisplayedValuesDomainPropertyId || propertyId == ValueConstraintShape.MaximumDisplayedColumnsDomainPropertyId)
{
ValueConstraintShape valueConstraintShape = (ValueConstraintShape)e.ModelElement;
if (!valueConstraintShape.IsDeleted)
{
valueConstraintShape.InvalidateDisplayText();
}
}
}
/// <summary>
/// ChangeRule: typeof(ValueConstraint), FireTime=TopLevelCommit, Priority=DiagramFixupConstants.ResizeParentRulePriority;
/// Rule to watch the ValueConstraint.TextChanged property so that we can
/// update text as needed. TextChanged is triggered when the ValueConstraint is
/// first added, so this is sufficient for updating.
/// </summary>
private static void ValueConstraintTextChangedRule(ElementPropertyChangedEventArgs e)
{
if (e.DomainProperty.Id == ValueConstraint.TextChangedDomainPropertyId)
{
ValueConstraint constraint = (ValueConstraint)e.ModelElement;
if (!constraint.IsDeleted)
{
foreach (ShapeElement pel in PresentationViewsSubject.GetPresentation(constraint))
{
ValueConstraintShape valueConstraintShape = pel as ValueConstraintShape;
if (valueConstraintShape != null)
{
valueConstraintShape.InvalidateDisplayText();
}
}
}
}
}