converters.cs

    /// <summary>
    /// Converts a <see cref="PackIcon{TKind}" /> to an ImageSource.
    /// Use the ConverterParameter to pass a Brush.
    /// </summary>
    public abstract class PackIconImageSourceConverterBase<TKind> : MarkupExtension, IValueConverter
    {
        /// <summary>
        /// Gets or sets the thickness to draw the icon with.
        /// </summary>
        public double Thickness { get; set; } = 0.25;

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (!(value is TKind))
                return null;

            var foregroundBrush = parameter as Brush ?? Brushes.Black;
            return CreateImageSource(value, foregroundBrush, Thickness);
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }

        protected abstract ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness);
    }

    /// <summary>
    /// Converts a <see cref="PackIcon{TKind}" /> to an ImageSource.
    /// Use the ConverterParameter to pass a Brush.
    /// </summary>
    public class PackIconImageSourceConverter : MarkupExtension, IValueConverter
    {
        /// <summary>
        /// Gets or sets the thickness to draw the icon with.
        /// </summary>
        public double Thickness { get; set; } = 0.25;

        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if (value is null)
                return null;

            if (value is PackIconFontAwesomeKind)
                return new PackIconFontAwesomeImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);
            if (value is PackIconMaterialKind)
                return new PackIconMaterialImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);
            if (value is PackIconMaterialLightKind)
                return new PackIconMaterialLightImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);
            if (value is PackIconModernKind)
                return new PackIconModernImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);
            if (value is PackIconEntypoKind)
                return new PackIconEntypoImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);
            if (value is PackIconOcticonsKind)
                return new PackIconOcticonsImageSourceConverter { Thickness = Thickness }.Convert(value, targetType, parameter, culture);

            return null;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        public override object ProvideValue(IServiceProvider serviceProvider)
        {
            return this;
        }
    }

    public class PackIconEntypoImageSourceConverter : PackIconImageSourceConverterBase<PackIconEntypoKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconEntypo { Kind = (PackIconEntypoKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing }, Transform = new ScaleTransform(1, -1) };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }

    public class PackIconFontAwesomeImageSourceConverter : PackIconImageSourceConverterBase<PackIconFontAwesomeKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconFontAwesome { Kind = (PackIconFontAwesomeKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing }, Transform = new ScaleTransform(1, -1) };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }

    public class PackIconMaterialImageSourceConverter : PackIconImageSourceConverterBase<PackIconMaterialKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconMaterial { Kind = (PackIconMaterialKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing } };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }

    public class PackIconMaterialLightImageSourceConverter : PackIconImageSourceConverterBase<PackIconMaterialLightKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconMaterialLight { Kind = (PackIconMaterialLightKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing } };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }

    public class PackIconModernImageSourceConverter : PackIconImageSourceConverterBase<PackIconModernKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconModern { Kind = (PackIconModernKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing } };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }

    public class PackIconOcticonsImageSourceConverter : PackIconImageSourceConverterBase<PackIconOcticonsKind>
    {
        protected override ImageSource CreateImageSource(object value, Brush foregroundBrush, double penThickness)
        {
            var packIcon = new PackIconOcticons { Kind = (PackIconOcticonsKind)value };

            var geometryDrawing = new GeometryDrawing
            {
                Geometry = Geometry.Parse(packIcon.Data),
                Brush = foregroundBrush,
                Pen = new Pen(foregroundBrush, penThickness)
            };

            var drawingGroup = new DrawingGroup { Children = { geometryDrawing } };

            return new DrawingImage { Drawing = drawingGroup };
        }
    }