■ ScrollView 클래스의 ScrollAnimationStarting 이벤트를 사용해 스크롤 애니메이션을 처리하는 방법을 보여준다.
▶ MainPage.xaml
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 |
<?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> <ScrollView Name="scrollView" Grid.Column="0" HorizontalAlignment="Center" VerticalAlignment="Center" Width="400" Height="300" IsTabStop="True"> <StackPanel> <Image Source="ms-appx:///IMAGE/grapes.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/rainier.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/sunset.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/treetops.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/valley.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/cliff.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/grapes.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/rainier.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/sunset.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/treetops.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/valley.jpg" Stretch="Uniform" /> <Image Source="ms-appx:///IMAGE/cliff.jpg" Stretch="Uniform" /> </StackPanel> </ScrollView> <Grid Grid.Column="2" HorizontalAlignment="Center" VerticalAlignment="Center" RowDefinitions="Auto,Auto,Auto" ColumnDefinitions="Auto,*"> <TextBlock Grid.Row="0" Grid.Column="0" HorizontalAlignment="Right" VerticalAlignment="Center" Text="Scroll with animation"/> <ComboBox Name="vcerticalAnimationComboBox" Grid.Row="0" Grid.Column="1" Margin="10 0 0 0" SelectedIndex="0"> <ComboBoxItem>Default</ComboBoxItem> <ComboBoxItem>Accordion</ComboBoxItem> <ComboBoxItem>Teleportation</ComboBoxItem> </ComboBox> <TextBlock Grid.Row="1" Grid.Column="0" HorizontalAlignment="Right" VerticalAlignment="Center" Margin="0 10 0 0" Text="Animation duration (msec)" /> <NumberBox Name="animationDurationNumberBox" Grid.Row="1" Grid.Column="1" Margin="10 10 0 0" Minimum="1000" Maximum="5000" Value="1500" SpinButtonPlacementMode="Inline" SmallChange="500" LargeChange="1000"> </NumberBox> <Button Name="scrollButton" Grid.Row="2" Grid.ColumnSpan="2" HorizontalAlignment="Center" Margin="0 10 0 0" Padding="10" Content="Scroll with animation" /> </Grid> </Grid> </Page> |
▶ MainPage.xaml.cs
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 |
using System; using System.Numerics; using Microsoft.UI.Composition; using Microsoft.UI.Xaml; using Microsoft.UI.Xaml.Controls; namespace TestProject { /// <summary> /// 메인 페이지 /// </summary> public sealed partial class MainPage : Page { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainPage() /// <summary> /// 생성자 /// </summary> public MainPage() { InitializeComponent(); this.scrollView.ScrollAnimationStarting += scrollView_ScrollAnimationStarting; this.scrollButton.Click += scrollButton_Click; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 스크롤 뷰 스크롤 애니메이션 시작시 처리하기 - scrollView_ScrollAnimationStarting(sender, e) /// <summary> /// 스크롤 뷰 스크롤 애니메이션 시작시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void scrollView_ScrollAnimationStarting(ScrollView sender, ScrollingScrollAnimationStartingEventArgs e) { Vector3KeyFrameAnimation animation1 = e.Animation as Vector3KeyFrameAnimation; if(animation1 != null) { if(this.vcerticalAnimationComboBox.SelectedIndex == 0) { animation1.Duration = TimeSpan.FromMilliseconds(this.animationDurationNumberBox.Value); } else { double targetVerticalOffset = GetTargetVerticalOffset(); float targetVerticalPosition = (float)targetVerticalOffset; Vector3KeyFrameAnimation animation2 = animation1.Compositor.CreateVector3KeyFrameAnimation(); if(this.vcerticalAnimationComboBox.SelectedIndex == 1) { float deltaVerticalPosition = 0.1f * (float)(targetVerticalOffset - this.scrollView.VerticalOffset); for(int step = 0; step < 3; step++) { animation2.InsertKeyFrame ( 1.0f - (0.4f / (float)Math.Pow(2, step)), new Vector3 ( (float)this.scrollView.HorizontalOffset, targetVerticalPosition + deltaVerticalPosition, 0.0f ) ); deltaVerticalPosition /= -2.0f; } animation2.InsertKeyFrame(1.0f, new Vector3((float)this.scrollView.HorizontalOffset, targetVerticalPosition, 0.0f)); } else { float deltaVerticalPosition = (float)(targetVerticalOffset - this.scrollView.VerticalOffset); CubicBezierEasingFunction startCubicBezierEasingFunction = animation1.Compositor.CreateCubicBezierEasingFunction ( new Vector2(1.0f, 0.0f), new Vector2(1.0f, 0.0f) ); StepEasingFunction stepEasingFunction = animation1.Compositor.CreateStepEasingFunction(1); CubicBezierEasingFunction endCubicBezierEasingFunction = animation1.Compositor.CreateCubicBezierEasingFunction ( new Vector2(0.0f, 1.0f), new Vector2(0.0f, 1.0f) ); animation2.InsertKeyFrame ( 0.499999f, new Vector3 ( (float)this.scrollView.HorizontalOffset, targetVerticalPosition - 0.9f * deltaVerticalPosition, 0.0f ), startCubicBezierEasingFunction ); animation2.InsertKeyFrame ( 0.5f, new Vector3 ( (float)this.scrollView.HorizontalOffset, targetVerticalPosition - 0.1f * deltaVerticalPosition, 0.0f ), stepEasingFunction ); animation2.InsertKeyFrame ( 1.0f, new Vector3 ( (float)this.scrollView.HorizontalOffset, targetVerticalPosition, 0.0f ), endCubicBezierEasingFunction ); } animation2.Duration = TimeSpan.FromMilliseconds(this.animationDurationNumberBox.Value); e.Animation = animation2; } } } #endregion #region Scroll with animation 버튼 클릭시 처리하기 - scrollButton_Click(sender, e) /// <summary> /// Scroll with animation 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void scrollButton_Click(object sender, RoutedEventArgs e) { if(this.scrollView != null) { this.scrollView.ScrollTo ( this.scrollView.HorizontalOffset, GetTargetVerticalOffset(), new ScrollingScrollOptions(ScrollingAnimationMode.Enabled, ScrollingSnapPointsMode.Ignore) ); } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 타겟 수직 오프셋 구하기 - GetTargetVerticalOffset() /// <summary> /// 타겟 수직 오프셋 구하기 /// </summary> /// <returns>타겟 수직 오프셋 구하기</returns> private double GetTargetVerticalOffset() { if(this.scrollView.VerticalOffset > this.scrollView.ScrollableHeight / 2.0) { return this.scrollView.ScrollableHeight / 5.0; } else { return 4.0 * this.scrollView.ScrollableHeight / 5.0; } } #endregion } } |
