■ ItemsRepeater 엘리먼트에서 애니메이션 스크롤을 사용하는 방법을 보여준다.
▶ MainPage.xaml
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<Page x:Class="TestProject.MainPage" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:muxc="using:Microsoft.UI.Xaml.Controls" Background="{ThemeResource ApplicationPageBackgroundThemeBrush}" FontFamily="나눔고딕코딩" FontSize="16"> <Grid> <Grid HorizontalAlignment="Center" VerticalAlignment="Center"> <Grid.ColumnDefinitions> <ColumnDefinition Width="Auto" /> <ColumnDefinition Width="50" /> <ColumnDefinition Width="Auto" /> </Grid.ColumnDefinitions> <ScrollViewer Name="scrollViewer" Grid.Column="0" Width="400" Height="300" ViewChanging="scrollViewer_ViewChanging"> <muxc:ItemsRepeater Name="itemsRepeater"> <DataTemplate x:DataType="x:String"> <Button Content="{x:Bind}" HorizontalAlignment="Stretch" Background="{x:Bind}" Foreground="{StaticResource SystemBaseHighColor}" Loaded="button_Loaded" GotFocus="button_GotFocusOrClick" Click="button_GotFocusOrClick" /> </DataTemplate> </muxc:ItemsRepeater> </ScrollViewer> <Rectangle x:Name="rectangle" Grid.Column="2" Stroke="{ThemeResource SystemControlForegroundBaseHighBrush}" Width="150" Height="150" /> </Grid> </Grid> </Page> |
▶ MainPage.xaml.cs
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using Microsoft.UI.Xaml.Controls; using System; using System.Collections.Generic; using System.Linq; using System.Reflection; using Windows.Foundation; using Windows.Graphics.Display; using Windows.UI; using Windows.UI.Composition; using Windows.UI.ViewManagement; using Windows.UI.Xaml; using Windows.UI.Xaml.Controls; using Windows.UI.Xaml.Hosting; namespace TestProject { /// <summary> /// 메인 페이지 /// </summary> public sealed partial class MainPage : Page { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 애니메이션 버튼 마진 /// </summary> private Thickness AnimatedButtonMargin; /// <summary> /// 애니메이션 버튼 높이 /// </summary> private double AnimatedButtonHeight; #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 = "ItemsRepeater 엘리먼트 : 애니메이션 스크롤 사용하기"; #endregion this.itemsRepeater.ItemsSource = GetColorList(); this.itemsRepeater.ElementPrepared += itemsRepeater_ElementPrepared; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 스크롤 뷰어 뷰 변경시 처리하기 - scrollViewer_ViewChanging(sender, e) /// <summary> /// 스크롤 뷰어 뷰 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void scrollViewer_ViewChanging(object sender, ScrollViewerViewChangingEventArgs e) { Button button = GetSelectedItemFromViewport() as Button; this.rectangle.Fill = button.Background; } #endregion #region 항목 반복자 엘리먼트 준비시 처리하기 - itemsRepeater_ElementPrepared(sender, e) /// <summary> /// 항목 반복자 엘리먼트 준비시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void itemsRepeater_ElementPrepared(ItemsRepeater sender, ItemsRepeaterElementPreparedEventArgs e) { Visual itemVisual = ElementCompositionPreview.GetElementVisual(e.Element); Visual scrollViewerVisual = ElementCompositionPreview.GetElementVisual(this.scrollViewer); CompositionPropertySet scrollViwerPropertySet = ElementCompositionPreview.GetScrollViewerManipulationPropertySet(this.scrollViewer); ExpressionAnimation scaleAnimation = scrollViwerPropertySet.Compositor.CreateExpressionAnimation(); scaleAnimation.SetReferenceParameter("scrollViewerVisual" , scrollViewerVisual ); scaleAnimation.SetReferenceParameter("scrollViwerPropertySet", scrollViwerPropertySet); scaleAnimation.SetReferenceParameter("itemVisual" , itemVisual ); scaleAnimation.Expression = "1 - abs((scrollViewerVisual.Size.Y / 2 - scrollViwerPropertySet.Translation.Y) - " + "(itemVisual.Offset.Y + itemVisual.Size.Y / 2)) * (.25 / (scrollViewerVisual.Size.Y / 2))"; itemVisual.StartAnimation("Scale.X", scaleAnimation); itemVisual.StartAnimation("Scale.Y", scaleAnimation); ExpressionAnimation centerPointAnimation = scrollViwerPropertySet.Compositor.CreateExpressionAnimation(); centerPointAnimation.SetReferenceParameter("itemVisual", itemVisual); centerPointAnimation.Expression = "Vector3(itemVisual.Size.X / 2, itemVisual.Size.Y / 2, 0)"; itemVisual.StartAnimation("CenterPoint", centerPointAnimation); } #endregion #region 버튼 로드시 처리하기 - button_Loaded(sender, e) /// <summary> /// 버튼 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void button_Loaded(object sender, RoutedEventArgs e) { Button button = sender as Button; AnimatedButtonMargin = button.Margin; AnimatedButtonHeight = button.ActualHeight; } #endregion #region 버튼 포커스 획득시/클릭시 처리하기 - button_GotFocusOrClick(sender, e) /// <summary> /// 버튼 포커스 획득시/클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void button_GotFocusOrClick(object sender, RoutedEventArgs e) { Button button = sender as Button; button.StartBringIntoView ( new BringIntoViewOptions() { VerticalAlignmentRatio = 0.5, AnimationDesired = true } ); this.rectangle.Fill = button.Background; } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 색상 리스트 구하기 - GetColorList() /// <summary> /// 색상 리스트 구하기 /// </summary> /// <returns>색상 리스트</returns> private IList<string> GetColorList() { IList<string> colorList = (typeof(Colors).GetRuntimeProperties().Select(color => color.ToString())).ToList(); for(int i = 0; i < colorList.Count(); i++) { colorList[i] = colorList[i].Substring(17); } return colorList; } #endregion #region 범위 내에서 뷰포트 중심점 구하기 - GetCenterPointOfViewportInExtent() /// <summary> /// 범위 내에서 뷰포트 중심점 구하기 /// </summary> /// <returns>뷰포트 중심점</returns> private double GetCenterPointOfViewportInExtent() { return this.scrollViewer.VerticalOffset + this.scrollViewer.ViewportHeight / 2; } #endregion #region 뷰포트에서 선택 인덱스 구하기 - GetSelectedIndexFromViewport() /// <summary> /// 뷰포트에서 선택 인덱스 구하기 /// </summary> /// <returns>선택 인덱스</returns> private int GetSelectedIndexFromViewport() { int selectedItemIndex = (int)Math.Floor(GetCenterPointOfViewportInExtent() / ((double)AnimatedButtonMargin.Top + AnimatedButtonHeight)); selectedItemIndex %= this.itemsRepeater.ItemsSourceView.Count; return selectedItemIndex; } #endregion #region 뷰포트에서 선택 항목 구하기 - GetSelectedItemFromViewport() /// <summary> /// 뷰포트에서 선택 항목 구하기 /// </summary> /// <returns>선택 항목</returns> private object GetSelectedItemFromViewport() { var selectedIndex = GetSelectedIndexFromViewport(); var selectedElement = this.itemsRepeater.TryGetElement(selectedIndex) as Button; return selectedElement; } #endregion } } |
