private IList <string> GetErrorsImpl(string propertyName)
{
var result = new List <string>();
var maxNumberOfShelfs = ElementDimension.MaximumNumberOfShelfs(this.Height);
if (propertyName == NotificationObject.PropertyName(() => this.NumberOfShelfs))
{
if (this.NumberOfShelfs > maxNumberOfShelfs)
{
result.Add(string.Format("Too many shelfs; maximum for this height is {0}", maxNumberOfShelfs));
}
}
else if (propertyName == NotificationObject.PropertyName(() => this.Width))
{
if (this.Width != this.Parent.Width)
{
result.Add("Width of item does not fit to width of element");
}
}
return(result);
}
public string this[string columnName]
{
get
{
var maxNumberOfShelfs = ElementDimension.MaximumNumberOfShelfs(this.Height);
if (columnName == NotificationObject.PropertyName(() => this.NumberOfShelfs))
{
if (this.NumberOfShelfs > maxNumberOfShelfs)
{
return(string.Format("Too many shelfs; maximum for this height is {0}", maxNumberOfShelfs));
}
}
else if (columnName == NotificationObject.PropertyName(() => this.Width))
{
if (this.Width != this.Parent.Width)
{
return("Width of item does not fit to width of element");
}
}
return(string.Empty);
}
}
private void OnParentChanged(object _, PropertyChangedEventArgs ea)
{
this.RaiseErrorsChanged(NotificationObject.PropertyName(() => this.Width));
}
protected virtual void RaisePropertyChanged <T>(Expression <Func <T> > ex)
{
this.RaisePropertyChanged(NotificationObject.PropertyName(ex));
}