Class RectangleFConverter

TexturedFontEditor/Helper.cs:248–326

    }

    public class RectangleFConverter : TypeConverter
    {
        // Methods
        public RectangleFConverter()
        {
        }
        public override bool CanConvertFrom(ITypeDescriptorContext context, Type sourceType)
        {
            return ((sourceType == typeof(string)) || base.CanConvertFrom(context, sourceType));
        }
        public override bool CanConvertTo(ITypeDescriptorContext context, Type destinationType)
        {
            return ((destinationType == typeof(RectangleF)) || base.CanConvertTo(context, destinationType));
        }
        public override object ConvertFrom(ITypeDescriptorContext context, CultureInfo culture, object value)
        {
            if (culture == null)
                culture = CultureInfo.CurrentCulture;

            if (!(value is string))
                return base.ConvertFrom(context, culture, value);

            string text = ((string)value).Trim();
            if (text.Length == 0)
                return null;

            char ch = culture.TextInfo.ListSeparator[0];
            string[] textArray = text.Split(new char[] { ch });
            float[] numArray = new float[textArray.Length];
            if (numArray.Length != 4)
                throw new ArgumentException("格式不正确");

            TypeConverter converter = TypeDescriptor.GetConverter(typeof(float));
            for (int i = 0; i < numArray.Length; i++)
                numArray[i] = (float)converter.ConvertFromString(context, culture, textArray[i]);

            return new RectangleF(numArray[0], numArray[1], numArray[2], numArray[3]);
        }
        public override object ConvertTo(ITypeDescriptorContext context, CultureInfo culture, object value, Type destinationType)
        {
            if (culture == null)
                culture = CultureInfo.CurrentCulture;
            if (destinationType == null)
                throw new ArgumentNullException("destinationType");

            if ((destinationType == typeof(string)) && (value is RectangleF))
            {
                RectangleF pointf = (RectangleF)value;

                string separator = culture.TextInfo.ListSeparator + " ";
                TypeConverter converter = TypeDescriptor.GetConverter(typeof(float));
                string[] textArray = new string[4];
                int num = 0;
                textArray[num++] = converter.ConvertToString(context, culture, pointf.X);
                textArray[num++] = converter.ConvertToString(context, culture, pointf.Y);
                textArray[num++] = converter.ConvertToString(context, culture, pointf.Width);
                textArray[num++] = converter.ConvertToString(context, culture, pointf.Height);
                return string.Join(separator, textArray);