private void UpdateItemsSource()
{
var font = string.IsNullOrEmpty(Element.FontFamily) ?
Font.SystemFontOfSize(Element.FontSize) :
Font.OfSize(Element.FontFamily, Element.FontSize);
var nativeFont = font.ToUIFont();
Control.Model = new MyDataModel(Element.ItemsSource, row =>
{
Element.SelectedIndex = row;
}, nativeFont);
}
public override object ConvertFromInvariantString(string value)
{
// string should be formatted as "[name],[attributes],[size]" there may be multiple attributes, e.g. "Georgia, Bold, Italic, 42"
if (value != null)
{
// trim because mono implements Enum.Parse incorrectly and fails to trim correctly.
List <string> parts = value.Split(',').Select(s => s.Trim()).ToList();
string name = null;
var bold = false;
var italic = false;
double size = -1;
NamedSize namedSize = 0;
// check if last is a size
string last = parts.Last();
double trySize;
NamedSize tryNamedSize;
if (double.TryParse(last, NumberStyles.Number, CultureInfo.InvariantCulture, out trySize))
{
size = trySize;
parts.RemoveAt(parts.Count - 1);
}
else if (Enum.TryParse(last, out tryNamedSize))
{
namedSize = tryNamedSize;
parts.RemoveAt(parts.Count - 1);
}
// check if first is a name
foreach (string part in parts)
{
FontAttributes tryAttibute;
if (Enum.TryParse(part, out tryAttibute))
{
// they did not provide a font name
if (tryAttibute == FontAttributes.Bold)
{
bold = true;
}
else if (tryAttibute == FontAttributes.Italic)
{
italic = true;
}
}
else
{
// they may have provided a font name
if (name != null)
{
throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(Font)));
}
name = part;
}
}
FontAttributes attributes = 0;
if (bold)
{
attributes = attributes | FontAttributes.Bold;
}
if (italic)
{
attributes = attributes | FontAttributes.Italic;
}
if (size == -1 && namedSize == 0)
{
namedSize = NamedSize.Medium;
}
if (name != null)
{
if (size == -1)
{
return(Font.OfSize(name, namedSize).WithAttributes(attributes));
}
return(Font.OfSize(name, size).WithAttributes(attributes));
}
if (size == -1)
{
return(Font.SystemFontOfSize(namedSize, attributes));
}
return(Font.SystemFontOfSize(size, attributes));
}
throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(Font)));
}
