using System;

using System.Windows;

using System.Windows.Controls;

using System.Windows.Input;

using System.Windows.Media;

using System.Windows.Media.Animation;



namespace MahApps.Metro.Controls

{

    public partial class RevealImage

    {

        public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(RevealImage), new UIPropertyMetadata(""));

        public static readonly DependencyProperty ImageProperty = DependencyProperty.Register("Image", typeof(ImageSource), typeof(RevealImage), new UIPropertyMetadata(null));



        public string Text

        {

            get { return (string)GetValue(TextProperty); }

            set { SetValue(TextProperty, value); }

        }



        public ImageSource Image

        {

            get { return (ImageSource)GetValue(ImageProperty); }

            set { SetValue(ImageProperty, value); }

        }



        



        public RevealImage()

        {

            InitializeComponent();

        }



        private static void TypewriteTextblock(string textToAnimate, TextBlock txt, TimeSpan timeSpan)

        {

            var story = new Storyboard

            {

                FillBehavior = FillBehavior.HoldEnd

            };



            DiscreteStringKeyFrame discreteStringKeyFrame;

            var stringAnimationUsingKeyFrames = new StringAnimationUsingKeyFrames

            {

                Duration = new Duration(timeSpan)

            };



            var tmp = string.Empty;

            foreach (var c in textToAnimate)

            {

                discreteStringKeyFrame = new DiscreteStringKeyFrame

                {

                    KeyTime = KeyTime.Paced

                };

                tmp += c;

                discreteStringKeyFrame.Value = tmp;

                stringAnimationUsingKeyFrames.KeyFrames.Add(discreteStringKeyFrame);

            }



            Storyboard.SetTargetName(stringAnimationUsingKeyFrames, txt.Name);

            Storyboard.SetTargetProperty(stringAnimationUsingKeyFrames, new PropertyPath(TextBlock.TextProperty));

            story.Children.Add(stringAnimationUsingKeyFrames);

            story.Begin(txt);

        }



        private void GridMouseEnter(object sender, MouseEventArgs e)

        {



            TypewriteTextblock(Text.ToUpper(), textBlock, TimeSpan.FromSeconds(.25));

        }

    }

}