■ ScrollView 엘리먼트의 AddScrollVelocity 메소드를 사용해 등속 스크롤을 처리하는 방법을 보여준다.
▶ MainPage.xaml
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<?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" /> </StackPanel> </ScrollView> <Grid Grid.Column="2" HorizontalAlignment="Center" VerticalAlignment="Center" RowDefinitions="Auto" ColumnDefinitions="Auto,*"> <TextBlock Grid.Row="0" Grid.Column="0" VerticalAlignment="Center" Text="Vertical velocity" /> <NumberBox Name="verticalVelocityNumberBox" Grid.Row="0" Grid.Column="1" Margin="10 0 0 0" Minimum="-200" Maximum="200" Value="30" SpinButtonPlacementMode="Inline" SmallChange="10" LargeChange="30" VerticalContentAlignment="Center"> </NumberBox> </Grid> </Grid> </Page> |
▶ MainPage.xaml.cs
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using System.Numerics; 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.verticalVelocityNumberBox.ValueChanged += verticalVelocityNumberBox_ValueChanged; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region Vertical Velocity 넘버 박스 값 변경시 처리하기 - verticalVelocityNumberBox_ValueChanged(sender, e) /// <summary> /// Vertical Velocity 넘버 박스 값 변경시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void verticalVelocityNumberBox_ValueChanged(NumberBox sender, NumberBoxValueChangedEventArgs e) { if(double.IsNaN(e.OldValue)) { return; } if(this.scrollView != null) { this.scrollView.ScrollBy ( 0, 0, new ScrollingScrollOptions(ScrollingAnimationMode.Disabled, ScrollingSnapPointsMode.Ignore) ); float verticalConstantVelocity = (float)this.verticalVelocityNumberBox.Value; if(e.NewValue <= 30.0 && e.NewValue >= -30) { if(e.NewValue < e.OldValue) { if(this.scrollView.VerticalOffset == 0) { verticalConstantVelocity = 30; } else { verticalConstantVelocity = -30; } } else { if(this.scrollView.VerticalOffset == this.scrollView.ScrollableHeight) { verticalConstantVelocity = -30; } else { verticalConstantVelocity = 30; } } } else if(e.NewValue < 30.0 && this.scrollView.VerticalOffset == 0) { verticalConstantVelocity = 30; } else if (e.NewValue > 30.0 && this.scrollView.VerticalOffset == this.scrollView.ScrollableHeight) { verticalConstantVelocity = -30; } this.verticalVelocityNumberBox.Value = verticalConstantVelocity; this.scrollView.AddScrollVelocity ( new Vector2(0f, verticalConstantVelocity), new Vector2() ); } } #endregion } } |
