ICODEBROKER

<Page x:Class="TestProject.MainPage"

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"

    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">

    <Grid Background="{StaticResource ApplicationPageBackgroundThemeBrush}">

        <TextBlock Name="textBlock"

            HorizontalAlignment="Center"

            VerticalAlignment="Center"

            FontFamily="CooperBlack"

            FontSize="2"

            Text="HELLO">

            <TextBlock.Foreground>

                <LinearGradientBrush x:Name="textBlockForegroundBrush">

                    <GradientStop Offset="0.00" Color="Red"    />

                    <GradientStop Offset="0.14" Color="Orange" />

                    <GradientStop Offset="0.28" Color="Yellow" />

                    <GradientStop Offset="0.43" Color="Green"  />

                    <GradientStop Offset="0.57" Color="Blue"   />

                    <GradientStop Offset="0.71" Color="Indigo" />

                    <GradientStop Offset="0.86" Color="Violet" />

                    <GradientStop Offset="1.00" Color="Red"    />

                    <GradientStop Offset="1.14" Color="Orange" />

                    <GradientStop Offset="1.28" Color="Yellow" />

                    <GradientStop Offset="1.43" Color="Green"  />

                    <GradientStop Offset="1.57" Color="Blue"   />

                    <GradientStop Offset="1.71" Color="Indigo" />

                    <GradientStop Offset="1.86" Color="Violet" />

                    <GradientStop Offset="2.00" Color="Red"    />

                </LinearGradientBrush>

            </TextBlock.Foreground>

        </TextBlock>

    </Grid>

</Page>

using Windows.UI.Xaml;

using Windows.UI.Xaml.Controls;

using Windows.UI.Xaml.Media;

namespace TestProject

{

    /// <summary>

    /// 메인 페이지

    /// </summary>

    public sealed partial class MainPage : Page

    {

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region Field

        /// <summary>

        /// 텍스트 블럭 실제 높이

        /// </summary>

        private double textBlockActualHeight;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor

        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>

        /// 생성자

        /// </summary>

        public MainPage()

        {

            InitializeComponent();

            Loaded += Page_Loaded;

        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method

        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region 페이지 로드시 처리하기 - Page_Loaded(sender, e)

        /// <summary>

        /// 페이지 로드시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void Page_Loaded(object sender, RoutedEventArgs e)

        {

            this.textBlockActualHeight = this.textBlock.ActualHeight;

            CompositionTarget.Rendering += CompositionTarget_Rendering;

        }

        #endregion

        #region 구성 타겟 렌더링시 처리하기 - CompositionTarget_Rendering(sender, e)

        /// <summary>

        /// 구성 타겟 렌더링시 처리하기

        /// </summary>

        /// <param name="sender">이벤트 발생자</param>

        /// <param name="e">이벤트 인자</param>

        private void CompositionTarget_Rendering(object sender, object e)

        {

            this.textBlock.FontSize = ActualHeight / textBlockActualHeight;

            RenderingEventArgs renderingEventArgs = e as RenderingEventArgs;

            double t = (0.25 * renderingEventArgs.RenderingTime.TotalSeconds) % 1;

            for(int index = 0; index < this.textBlockForegroundBrush.GradientStops.Count; index++)

            {

                this.textBlockForegroundBrush.GradientStops[index].Offset = index / 7.0 - t;  

            }

        }

        #endregion

    }

}