첨부 소스 코드는 나눔고딕코딩 폰트를 사용합니다.
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TestProject.zip
0.02MB

▶ MainPage.xaml

<Page x:Class="TestProject.MainPage"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Background="{ThemeResource ApplicationPageBackgroundThemeBrush}"
    FontFamily="나눔고딕코딩"
    FontSize="16">
    <Grid>
        <Grid Loaded="grid_Loaded">
            <Grid.ColumnDefinitions>
                <ColumnDefinition Width="*" />
                <ColumnDefinition Width="*" />
            </Grid.ColumnDefinitions>
            <Rectangle Name="rectangle" Grid.Column="0"
                Width="50"
                Height="50"
                Fill="{ThemeResource SystemAccentColor}"
                PointerEntered="rectangle_PointerEntered"
                PointerExited="rectangle_PointerExited" />
            <Ellipse Name="ellipse" Grid.Column="1"
                Width="50"
                Height="50"
                Fill="{ThemeResource SystemAccentColor}" />
        </Grid>
    </Grid>
</Page>

 

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▶ MainPage.xaml.cs

using System;
using System.Numerics;
using Windows.Foundation;
using Windows.Foundation.Metadata;
using Windows.Graphics.Display;
using Windows.UI.Composition;
using Windows.UI.ViewManagement;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Input;
using Windows.UI.Xaml.Shapes;

namespace TestProject
{
    /// <summary>
    /// 메인 페이지
    /// </summary>
    public sealed partial class MainPage : Page
    {
        //////////////////////////////////////////////////////////////////////////////////////////////////// Field
        ////////////////////////////////////////////////////////////////////////////////////////// Private

        #region Field

        /// <summary>
        /// 작성자
        /// </summary>
        private Compositor compositor = Window.Current.Compositor;

        /// <summary>
        /// 애니메이션
        /// </summary>
        private SpringVector3NaturalMotionAnimation animation;

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor
        ////////////////////////////////////////////////////////////////////////////////////////// Public

        #region 생성자 - MainPage()

        /// <summary>
        /// 생성자
        /// </summary>
        public MainPage()
        {
            InitializeComponent();

            #region 윈도우 크기를 설정한다.

            double width  = 800d;
            double height = 600d;

            double dpi = (double)DisplayInformation.GetForCurrentView().LogicalDpi;

            ApplicationView.PreferredLaunchWindowingMode = ApplicationViewWindowingMode.PreferredLaunchViewSize;

            Size windowSize = new Size(width * 96d / dpi, height * 96d / dpi);

            ApplicationView.PreferredLaunchViewSize = windowSize;

            Window.Current.Activate();

            ApplicationView.GetForCurrentView().TryResizeView(windowSize);

            #endregion
            #region 윈도우 제목을 설정한다.

            ApplicationView.GetForCurrentView().Title = "ExpressionAnimation 클래스 사용하기";

            #endregion
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////////////////////////// Method
        ////////////////////////////////////////////////////////////////////////////////////////// Private
        //////////////////////////////////////////////////////////////////////////////// Event

        #region 그리드 로드시 처리하기 - grid_Loaded(sender, e)

        /// <summary>
        /// 그리드 로드시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void grid_Loaded(object sender, RoutedEventArgs e)
        {
            ExpressionAnimation animation = this.compositor.CreateExpressionAnimation();

            animation.Expression = "Vector3(1 / sourceElement.Scale.X, 1 / sourceElement.Scale.Y, 1)";
            animation.Target     = "Scale";

            if(ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 7))
            {
                animation.SetExpressionReferenceParameter("sourceElement", this.rectangle);
            }

            StartAnimation(this.ellipse, animation);
        }

        #endregion
        #region 사각형 포인터 진입시 처리하기 - rectangle_PointerEntered(sender, e)

        /// <summary>
        /// 사각형 포인터 진입시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void rectangle_PointerEntered(object sender, PointerRoutedEventArgs e)
        {
            Rectangle rectangle = sender as Rectangle;

            UpdateSpringAnimation(1.5f);

            StartAnimation(rectangle, this.animation);
        }

        #endregion
        #region 사각형 포인터 이탈시 처리하기 - rectangle_PointerExited(sender, e)

        /// <summary>
        /// 사각형 포인터 이탈시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void rectangle_PointerExited(object sender, PointerRoutedEventArgs e)
        {
            Rectangle rectangle = sender as Rectangle;

            UpdateSpringAnimation(1f);

            StartAnimation(rectangle, this.animation);
        }

        #endregion

        //////////////////////////////////////////////////////////////////////////////// Function

        #region 스프링 애니메이션 업데이트하기 - UpdateSpringAnimation(finalValue)

        /// <summary>
        /// 스프링 애니메이션 업데이트하기
        /// </summary>
        /// <param name="finalValue">최종 값</param>
        private void UpdateSpringAnimation(float finalValue)
        {
            if(this.animation == null)
            {
                this.animation = this.compositor.CreateSpringVector3Animation();

                this.animation.Target = "Scale";
            }

            this.animation.FinalValue   = new Vector3(finalValue);
            this.animation.DampingRatio = 0.6f;
            this.animation.Period       = TimeSpan.FromMilliseconds(50);
        }

        #endregion
        #region 애니메이션 시작하기 - StartAnimation(element, animation)

        /// <summary>
        /// 애니메이션 시작하기
        /// </summary>
        /// <param name="element">엘리먼트</param>
        /// <param name="animation">애니메이션</param>
        private void StartAnimation(UIElement element, CompositionAnimation animation)
        {
            if(ApiInformation.IsApiContractPresent("Windows.Foundation.UniversalApiContract", 7))
            {
                element.StartAnimation(animation);
            }
        }

        #endregion
    }
}
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