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author | Jason Smith <jason.smith@xamarin.com> | 2016-03-22 13:02:25 -0700 |
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committer | Jason Smith <jason.smith@xamarin.com> | 2016-03-22 16:13:41 -0700 |
commit | 17fdde66d94155fc62a034fa6658995bef6fd6e5 (patch) | |
tree | b5e5073a2a7b15cdbe826faa5c763e270a505729 /Xamarin.Forms.Core/FontSizeConverter.cs | |
download | xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.tar.gz xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.tar.bz2 xamarin-forms-17fdde66d94155fc62a034fa6658995bef6fd6e5.zip |
Initial import
Diffstat (limited to 'Xamarin.Forms.Core/FontSizeConverter.cs')
-rw-r--r-- | Xamarin.Forms.Core/FontSizeConverter.cs | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/Xamarin.Forms.Core/FontSizeConverter.cs b/Xamarin.Forms.Core/FontSizeConverter.cs new file mode 100644 index 00000000..0d0a8865 --- /dev/null +++ b/Xamarin.Forms.Core/FontSizeConverter.cs @@ -0,0 +1,48 @@ +using System; +using System.Globalization; +using Xamarin.Forms.Xaml; + +namespace Xamarin.Forms +{ + public class FontSizeConverter : TypeConverter, IExtendedTypeConverter + { + [Obsolete("use ConvertFromInvariantString (string, IServiceProvider)")] + object IExtendedTypeConverter.ConvertFrom(CultureInfo culture, object value, IServiceProvider serviceProvider) + { + return ((IExtendedTypeConverter)this).ConvertFromInvariantString(value as string, serviceProvider); + } + + object IExtendedTypeConverter.ConvertFromInvariantString(string value, IServiceProvider serviceProvider) + { + if (value != null) + { + double size; + if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out size)) + return size; + NamedSize namedSize; + if (Enum.TryParse(value, out namedSize)) + { + Type type; + var valueTargetProvider = serviceProvider.GetService(typeof(IProvideValueTarget)) as IProvideValueTarget; + type = valueTargetProvider != null ? valueTargetProvider.TargetObject.GetType() : typeof(Label); + return Device.GetNamedSize(namedSize, type, false); + } + } + throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double))); + } + + public override object ConvertFromInvariantString(string value) + { + if (value != null) + { + double size; + if (double.TryParse(value, NumberStyles.Number, CultureInfo.InvariantCulture, out size)) + return size; + NamedSize namedSize; + if (Enum.TryParse(value, out namedSize)) + return Device.GetNamedSize(namedSize, typeof(Label), false); + } + throw new InvalidOperationException(string.Format("Cannot convert \"{0}\" into {1}", value, typeof(double))); + } + } +}
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