public override bool IsValid(ITypeDescriptorContext context, object value)
{
try
{
return(TextStyleStack.IsValidFormat((string)value));
}
catch
{
throw new Exception("isvalid failed");
}
}
public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
{
try
{
return(TextStyleStack.Parse((string)value));
}
catch
{
throw new Exception("convertfrom failed");
}
}
public static TextStyleStack Parse(string stack)
{
var value = new TextStyleStack();
var stackMembers = stack.Split(' ');
foreach (var stackMember in stackMembers)
{
if (stackMember.ToLower() == "bold")
{
value.FontWeight = FontWeights.Bold;
}
if (stackMember.EndsWith("pt"))
{
value.FontSize = (double)fsc.ConvertFromString(stackMember);
}
}
return(value);
}
public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
{
try
{
if (destinationType == null)
{
throw new ArgumentNullException(nameof(destinationType));
}
if (value == null)
{
throw new ArgumentNullException(nameof(value));
}
var strValue = ConvertToInvariantString(context, value);
if (destinationType == typeof(string))
{
return(value.ToString());
}
if (destinationType == typeof(InstanceDescriptor))
{
var info = TargetType.GetField(strValue);
if (info != null)
{
return(new InstanceDescriptor(info, null));
}
}
if (destinationType == TargetType)
{
return(TextStyleStack.Parse(strValue));
}
throw new Exception("convertto failed");
}
catch
{
throw new Exception("convertto failed unknown");
}
}
public static void SetStyleStack(DependencyObject i, TextStyleStack v) => i.Set(StyleStackProperty, v);
