■ 마우스 이벤트를 사용해 스크롤을 처리하는 방법을 보여준다.
▶ PanelScrollHelper.cs
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using System; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media.Animation; namespace TestProject { /// <summary> /// 패널 스크롤 헬퍼 /// </summary> public class PanelScrollHelper { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 최소 시간 /// </summary> private const int MINIMUM_TIME = 100; /// <summary> /// 최소 범위 /// </summary> private const int MINIMUM_RANGE = 30; /// <summary> /// 타겟 프레임워크 엘리먼트 /// </summary> private FrameworkElement targetFrameworkElement = null; /// <summary> /// 타겟 부모 프레임워크 엘리먼트 /// </summary> private FrameworkElement targetParentFrameworkElement = null; /// <summary> /// 시작점 /// </summary> private Point startPoint; /// <summary> /// 종료점 /// </summary> private Point endPoint; /// <summary> /// 이동 더블 애니메이션 /// </summary> private DoubleAnimation moveDoubleAnimation; /// <summary> /// 최근 이동 시간 /// </summary> private double lastMoveTime; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - PanelScrollHelper(targetFrameworkElement) /// <summary> /// 생성자 /// </summary> /// <param name="targetFrameworkElement">타겟 프레임워크 엘리먼트</param> public PanelScrollHelper(FrameworkElement targetFrameworkElement) { this.targetFrameworkElement = targetFrameworkElement; this.targetParentFrameworkElement = this.targetFrameworkElement.Parent as FrameworkElement; this.targetFrameworkElement.PreviewMouseDown += targetFrameworkElement_PreviewMouseDown; this.targetFrameworkElement.PreviewMouseMove += targetFrameworkElement_PreviewMouseMove; this.targetFrameworkElement.PreviewMouseUp += targetFrameworkElement_PreviewMouseUp; this.moveDoubleAnimation = new DoubleAnimation(); this.moveDoubleAnimation.Duration = TimeSpan.FromMilliseconds(1000); this.moveDoubleAnimation.DecelerationRatio = 0.8d; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 타겟 프레임워크 엘리먼트 프리뷰 마우스 버튼 하강시 처리하기 - targetFrameworkElement_PreviewMouseDown(sender, e) /// <summary> /// 타겟 프레임워크 엘리먼트 프리뷰 마우스 버튼 하강시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetFrameworkElement_PreviewMouseDown(object sender, MouseButtonEventArgs e) { this.startPoint = e.GetPosition(this.targetFrameworkElement); this.targetFrameworkElement.CaptureMouse(); } #endregion #region 타겟 프레임워크 엘리먼트 프리뷰 마우스 이동시 처리하기 - targetFrameworkElement_PreviewMouseMove(sender, e) /// <summary> /// 타겟 프레임워크 엘리먼트 프리뷰 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetFrameworkElement_PreviewMouseMove(object sender, MouseEventArgs e) { if(e.LeftButton != MouseButtonState.Pressed) { return; } if((DateTime.Now.TimeOfDay.TotalMilliseconds - this.lastMoveTime) < MINIMUM_TIME) { return; } this.lastMoveTime = DateTime.Now.TimeOfDay.TotalMilliseconds; Point targetParentFrameworkElementPoint = e.GetPosition(this.targetParentFrameworkElement); if(targetParentFrameworkElementPoint.Y == this.endPoint.Y) { return; } this.endPoint = targetParentFrameworkElementPoint; Point targetFrameworkElementPoint = e.GetPosition(this.targetFrameworkElement); double movePosition = (targetFrameworkElementPoint.Y - this.startPoint.Y); if(Math.Abs(movePosition) < MINIMUM_RANGE) { return; } double currentCanvasTop = (double)(this.targetFrameworkElement.GetValue(Canvas.TopProperty)); double delta = movePosition * 2d; double minimumCanvasTop = this.targetParentFrameworkElement.ActualHeight - this.targetFrameworkElement.ActualHeight; double maximumCanvasTop = 0d; if(currentCanvasTop + delta < minimumCanvasTop) { delta += minimumCanvasTop - (currentCanvasTop + delta); } if(currentCanvasTop + delta > maximumCanvasTop) { delta -= currentCanvasTop + delta - maximumCanvasTop; } this.moveDoubleAnimation.By = delta; this.targetFrameworkElement.BeginAnimation(Canvas.TopProperty, this.moveDoubleAnimation); } #endregion #region 타겟 프레임워크 엘리먼트 프리뷰 마우스 버튼 상승시 처리하기 - targetFrameworkElement_PreviewMouseUp(sender, e) /// <summary> /// 타겟 프레임워크 엘리먼트 프리뷰 마우스 버튼 상승시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetFrameworkElement_PreviewMouseUp(object sender, MouseButtonEventArgs e) { this.targetFrameworkElement.ReleaseMouseCapture(); } #endregion } } |
▶ MainWindow.xaml
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<Window x:Class="TestProject.MainWindow" xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" Width="800" Height="600" Title="마우스 이벤트를 사용해 스크롤 처리하기" FontFamily="나눔고딕코딩" FontSize="16"> <Grid> <Border HorizontalAlignment="Center" VerticalAlignment="Center" Width="600" Height="450" BorderBrush="Black" BorderThickness="1"> <Canvas Width="598" Height="448" HorizontalAlignment="Center" VerticalAlignment="Center" ClipToBounds="True"> <StackPanel x:Name="stackPanel" Canvas.Top="0" Width="598" HorizontalAlignment="Center" Background="BurlyWood"> <StackPanel.Resources> <Style TargetType="Button"> <Setter Property="Margin" Value="5" /> <Setter Property="Height" Value="30" /> </Style> </StackPanel.Resources> </StackPanel> </Canvas> </Border> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System.Windows; using System.Windows.Controls; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); Loaded += Window_Loaded; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 윈도우 로드시 처리하기 - Window_Loaded(sender, e) /// <summary> /// 윈도우 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void Window_Loaded(object sender, RoutedEventArgs e) { for(int i = 0; i < 99; i++) { TextBlock textBlock = new TextBlock(); textBlock.Text = string.Format("{0:d2}번째 문장입니다.", i + 1); this.stackPanel.Children.Add(textBlock); } PanelScrollHelper helper = new PanelScrollHelper(this.stackPanel); } #endregion } } |
