ScreenToGif/Controls/TextPath.cs

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using System.ComponentModel;
using System.Threading;
using System.Windows;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Shapes;

namespace ScreenToGif.Controls
{
    /// <summary>
    /// This class generates a Geometry from a block of text in a specific font, weight, etc.
    /// and renders it to WPF as a shape.
    /// </summary>
    public class TextPath : Shape
    {
        /// <summary>
        /// Data member that holds the generated geometry
        /// </summary>
        private Geometry _textGeometry;

        #region Dependency Properties

        public static readonly DependencyProperty TextProperty = 
                        DependencyProperty.Register("Text", typeof(string), typeof(TextPath), 
                            new FrameworkPropertyMetadata(string.Empty,
                                FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure,
                                   OnPropertyChanged));

        public static readonly DependencyProperty OriginPointProperty = 
                        DependencyProperty.Register("Origin", typeof(Point), typeof(TextPath),
                            new FrameworkPropertyMetadata(new Point(0, 0),
                                FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure,
                                   OnPropertyChanged));

        public static readonly DependencyProperty FontFamilyProperty = TextElement.FontFamilyProperty.AddOwner(typeof(TextPath), 
                               new FrameworkPropertyMetadata(SystemFonts.MessageFontFamily,
                                   FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.Inherits,
                                   OnPropertyChanged));

        public static readonly DependencyProperty FontSizeProperty = TextElement.FontSizeProperty.AddOwner(typeof (TextPath),
                                new FrameworkPropertyMetadata(SystemFonts.MessageFontSize,
                                   FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure,
                                   OnPropertyChanged));

        public static readonly DependencyProperty FontStretchProperty = TextElement.FontStretchProperty.AddOwner(typeof(TextPath),
                               new FrameworkPropertyMetadata(TextElement.FontStretchProperty.DefaultMetadata.DefaultValue,
                                   FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.Inherits,
                                   OnPropertyChanged));

        public static readonly DependencyProperty FontStyleProperty = TextElement.FontStyleProperty.AddOwner(typeof(TextPath),
                               new FrameworkPropertyMetadata(SystemFonts.MessageFontStyle,
                                   FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.Inherits,
                                   OnPropertyChanged));

        public static readonly DependencyProperty FontWeightProperty = TextElement.FontWeightProperty.AddOwner(typeof(TextPath),
                               new FrameworkPropertyMetadata(SystemFonts.MessageFontWeight,
                                   FrameworkPropertyMetadataOptions.AffectsRender | FrameworkPropertyMetadataOptions.AffectsMeasure | FrameworkPropertyMetadataOptions.Inherits,
                                   OnPropertyChanged));
        #endregion