[C#/WINUI3/.NET6] ExpressionAnimation 클래스 : 크기에 따라 새로운 레이아웃 만들기

■ ExpressionAnimation 클래스를 사용해 크기에 따라 새로운 레이아웃을 만드는 방법을 보여준다.

▶ MainPage.xaml


<?xml version="1.0" encoding="utf-8"?>
<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 Margin="10">
        <Grid.ColumnDefinitions>
            <ColumnDefinition Width="*"    />
            <ColumnDefinition Width="10"   />
            <ColumnDefinition Width="Auto" />
        </Grid.ColumnDefinitions>
        <Grid Name="layoutGrid" Grid.Column="0"
            Width="200"
            Height="200" />
        <Slider Name="radiusSlider" Grid.Column="2"
            HorizontalAlignment="Center"
            VerticalAlignment="Center"
            Header="Change radius"
            Width="150"
            Minimum="200"
            Maximum="400" />
    </Grid>
</Page>

<?xml version="1.0" encoding="utf-8"?>

<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.ColumnDefinitions>

</Grid.ColumnDefinitions>

<Grid Name="layoutGrid" Grid.Column="0"

Width="200"

Height="200" />

<Slider Name="radiusSlider" Grid.Column="2"

HorizontalAlignment="Center"

VerticalAlignment="Center"

Header="Change radius"

Width="150"

Minimum="200"

Maximum="400" />

</Grid>

</Page>

▶ MainPage.xaml.cs


using Microsoft.UI.Composition;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Automation;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Controls.Primitives;
using Microsoft.UI.Xaml.Media;

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

        #region Field

        /// <summary>
        /// 합성자
        /// </summary>
        private Compositor compositor = CompositionTarget.GetCompositorForCurrentThread();

        #endregion

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

        #region 생성자 - MainPage()

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

            Loaded                         += Page_Loaded;
            this.radiusSlider.ValueChanged += radiusSlider_ValueChanged;
        }

        #endregion

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

        #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)
        {
            string radius     = "(layoutGrid.ActualSize.X / 2)";
            string theta      = ".02 * " + radius + " + ((2 * Pi) / buttonCount) * index";
            string xOffset    = radius;
            string yOffset    = "0";
            string expression = string.Format("Vector3({0} * cos({1}) + {2}, {0} * sin({1}) + {3}, 0)", radius, theta, xOffset, yOffset);

            int buttonCount = 8;

            for(int i = 0; i < buttonCount; i++)
            {
                Button button = new Button() { Content = "Button" };

                AutomationProperties.SetName(button, "Button " + i);

                this.layoutGrid.Children.Add(button);

                ExpressionAnimation animation = this.compositor.CreateExpressionAnimation();

                animation.Expression = expression;

                animation.SetScalarParameter("index", i + 1);
                animation.SetScalarParameter("buttonCount", buttonCount);

                animation.Target = "Translation";

                animation.SetExpressionReferenceParameter("layoutGrid", this.layoutGrid);

                button.StartAnimation(animation);
            }
        }

        #endregion
        #region 반경 슬라이더 값 변경시 처리하기 - radiusSlider_ValueChanged(sender, e)

        /// <summary>
        /// 반경 슬라이더 값 변경시 처리하기
        /// </summary>
        /// <param name="sender">이벤트 발생자</param>
        /// <param name="e">이벤트 인자</param>
        private void radiusSlider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)
        {
            if(this.layoutGrid == null)
            {
                return;
            }

            this.layoutGrid.Width = this.layoutGrid.Height = e.NewValue;
        }

        #endregion
    }
}

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using Microsoft.UI.Composition;

using Microsoft.UI.Xaml;

using Microsoft.UI.Xaml.Automation;

using Microsoft.UI.Xaml.Controls;

using Microsoft.UI.Xaml.Controls.Primitives;

using Microsoft.UI.Xaml.Media;

namespace TestProject

{

/// <summary>

/// 메인 페이지

/// </summary>

public sealed partial class MainPage : Page

{

//////////////////////////////////////////////////////////////////////////////////////////////////// Field

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

#region Field

/// <summary>

/// 합성자

/// </summary>

private Compositor compositor = CompositionTarget.GetCompositorForCurrentThread();

#endregion

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

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

#region 생성자 - MainPage()

/// <summary>

/// 생성자

/// </summary>

public MainPage()

{

InitializeComponent();

Loaded += Page_Loaded;

this.radiusSlider.ValueChanged += radiusSlider_ValueChanged;

}

#endregion

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

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

//////////////////////////////////////////////////////////////////////////////// Event

#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)

{

string radius = "(layoutGrid.ActualSize.X / 2)";

string theta = ".02 * " + radius + " + ((2 * Pi) / buttonCount) * index";

string xOffset = radius;

string yOffset = "0";

string expression = string.Format("Vector3({0} * cos({1}) + {2}, {0} * sin({1}) + {3}, 0)", radius, theta, xOffset, yOffset);

int buttonCount = 8;

for(int i = 0; i < buttonCount; i++)

{

Button button = new Button() { Content = "Button" };

AutomationProperties.SetName(button, "Button " + i);

this.layoutGrid.Children.Add(button);

ExpressionAnimation animation = this.compositor.CreateExpressionAnimation();

animation.Expression = expression;

animation.SetScalarParameter("index", i + 1);

animation.SetScalarParameter("buttonCount", buttonCount);

animation.Target = "Translation";

animation.SetExpressionReferenceParameter("layoutGrid", this.layoutGrid);

button.StartAnimation(animation);

}

#endregion

#region 반경 슬라이더 값 변경시 처리하기 - radiusSlider_ValueChanged(sender, e)

/// <summary>

/// 반경 슬라이더 값 변경시 처리하기

/// </summary>

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

/// <param name="e">이벤트 인자</param>

private void radiusSlider_ValueChanged(object sender, RangeBaseValueChangedEventArgs e)

{

if(this.layoutGrid == null)

{

return;

}

this.layoutGrid.Width = this.layoutGrid.Height = e.NewValue;

}

#endregion

}

TestProject.zip