■ ScrollViewer 클래스에서 마우스를 사용해 스크롤하는 방법을 보여준다.
▶ MouseCapture.cs
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using System.Windows; namespace TestProject { /// <summary> /// 마우스 캡처 /// </summary> public class MouseCapture { //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 수직 오프셋 - VerticalOffset /// <summary> /// 수직 오프셋 /// </summary> public double VerticalOffset { get; set; } #endregion #region 포인트 - Point /// <summary> /// 포인트 /// </summary> public Point Point { get; set; } #endregion } } |
▶ MouseScrolling.cs
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using System; using System.Collections.Generic; using System.Windows; using System.Windows.Controls; using System.Windows.Input; namespace TestProject { /// <summary> /// 마우스 스크롤링 /// </summary> public class MouseScrolling : DependencyObject { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 마우스 캡처 딕셔너리 /// </summary> private static Dictionary<object, MouseCapture> _mouseCaptureDictionary = new Dictionary<object, MouseCapture>(); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Dependency Property ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 이용 가능 여부 첨부 속성 - IsEnabledProperty /// <summary> /// 이용 가능 여부 첨부 속성 /// </summary> public static readonly DependencyProperty IsEnabledProperty = DependencyProperty.RegisterAttached ( "IsEnabled", typeof(bool), typeof(MouseScrolling), new UIPropertyMetadata(false, IsEnabledPropertyChangedCallback) ); #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Property ////////////////////////////////////////////////////////////////////////////////////////// Public #region 이용 가능 여부 - IsEnabled /// <summary> /// 이용 가능 여부 /// </summary> public bool IsEnabled { get { return (bool)GetValue(IsEnabledProperty); } set { SetValue(IsEnabledProperty, value); } } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Static //////////////////////////////////////////////////////////////////////////////// Public #region 이용 가능 여부 구하기 - GetIsEnabled(d) /// <summary> /// 이용 가능 여부 구하기 /// </summary> /// <param name="d">의존 객체</param> /// <returns>이용 가능 여부</returns> public static bool GetIsEnabled(DependencyObject d) { return (bool)d.GetValue(IsEnabledProperty); } #endregion #region 이용 가능 여부 설정하기 - SetIsEnabled(d, value) /// <summary> /// 이용 가능 여부 설정하기 /// </summary> /// <param name="d">의존 객체</param> /// <param name="value">값</param> public static void SetIsEnabled(DependencyObject d, bool value) { d.SetValue(IsEnabledProperty, value); } #endregion //////////////////////////////////////////////////////////////////////////////// Private ////////////////////////////////////////////////////////////////////// Event #region 이용 가능 여부 속성 변경시 콜백 처리하기 - IsEnabledPropertyChangedCallback(d, e) /// <summary> /// 이용 가능 여부 속성 변경시 콜백 처리하기 /// </summary> /// <param name="d">의존 객체</param> /// <param name="e">이벤트 인자</param> private static void IsEnabledPropertyChangedCallback(DependencyObject d, DependencyPropertyChangedEventArgs e) { ScrollViewer scrollViewer = d as ScrollViewer; if(scrollViewer == null) { return; } if((bool)e.NewValue) { scrollViewer.Loaded += scrollViewer_Loaded; } else { scrollViewer_Unloaded(scrollViewer, new RoutedEventArgs()); } } #endregion #region 스크롤 뷰어 로드시 처리하기 - scrollViewer_Loaded(sender, e) /// <summary> /// 스크롤 뷰어 로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private static void scrollViewer_Loaded(object sender, RoutedEventArgs e) { ScrollViewer scrollViewer = sender as ScrollViewer; if(scrollViewer == null) { return; } scrollViewer.Unloaded += scrollViewer_Unloaded; scrollViewer.PreviewMouseLeftButtonDown += scrollViewer_PreviewMouseLeftButtonDown; scrollViewer.PreviewMouseMove += scrollViewer_PreviewMouseMove; scrollViewer.PreviewMouseLeftButtonUp += scrollViewer_PreviewMouseLeftButtonUp; } #endregion #region 스크롤 뷰어 언로드시 처리하기 - scrollViewer_Unloaded(sender, e) /// <summary> /// 스크롤 뷰어 언로드시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private static void scrollViewer_Unloaded(object sender, RoutedEventArgs e) { ScrollViewer scrollViewer = sender as ScrollViewer; if(scrollViewer == null) { return; } _mouseCaptureDictionary.Remove(sender); scrollViewer.Loaded -= scrollViewer_Loaded; scrollViewer.Unloaded -= scrollViewer_Unloaded; scrollViewer.PreviewMouseLeftButtonDown -= scrollViewer_PreviewMouseLeftButtonDown; scrollViewer.PreviewMouseMove -= scrollViewer_PreviewMouseMove; scrollViewer.PreviewMouseLeftButtonUp -= scrollViewer_PreviewMouseLeftButtonUp; } #endregion #region 스크롤 뷰어 PREVIEW 마우스 왼쪽 버튼 DOWN 처리하기 - scrollViewer_PreviewMouseLeftButtonDown(sender, e) /// <summary> /// 스크롤 뷰어 PREVIEW 마우스 왼쪽 버튼 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private static void scrollViewer_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e) { ScrollViewer scrollViewer = e.OriginalSource as ScrollViewer; if(scrollViewer == null) { return; } _mouseCaptureDictionary[sender] = new MouseCapture { VerticalOffset = scrollViewer.VerticalOffset, Point = e.GetPosition(scrollViewer) }; } #endregion #region 스크롤 뷰어 PREVIEW 마우스 이동시 처리하기 - scrollViewer_PreviewMouseMove(sender, e) /// <summary> /// 스크롤 뷰어 PREVIEW 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private static void scrollViewer_PreviewMouseMove(object sender, MouseEventArgs e) { if(!_mouseCaptureDictionary.ContainsKey(sender)) { return; } if(e.LeftButton != MouseButtonState.Pressed) { _mouseCaptureDictionary.Remove(sender); return; } ScrollViewer scrollViewer = sender as ScrollViewer; if(scrollViewer == null) { return; } MouseCapture mouseCapture = _mouseCaptureDictionary[sender]; Point point = e.GetPosition(scrollViewer); double deltaY = point.Y - mouseCapture.Point.Y; if(Math.Abs(deltaY) > 5) { scrollViewer.CaptureMouse(); } scrollViewer.ScrollToVerticalOffset(mouseCapture.VerticalOffset - deltaY); } #endregion #region 스크롤 뷰어 PREVIEW 마우스 왼쪽 버튼 UP 처리하기 - scrollViewer_PreviewMouseLeftButtonUp(sender, e) /// <summary> /// 스크롤 뷰어 PREVIEW 마우스 왼쪽 버튼 UP 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private static void scrollViewer_PreviewMouseLeftButtonUp(object sender, MouseButtonEventArgs e) { ScrollViewer srollViewer = sender as ScrollViewer; if(srollViewer == null) { return; } srollViewer.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" xmlns:local="clr-namespace:TestProject" Width="800" Height="600" Title="ScrollViewer 클래스 : 마우스를 사용해 스크롤하기" FontFamily="나눔고딕코딩" FontSize="16"> <Window.Resources> <Style TargetType="Ellipse"> <Setter Property="Width" Value="100" /> <Setter Property="Height" Value="100" /> </Style> </Window.Resources> <Grid> <ScrollViewer VerticalScrollBarVisibility="Auto" local:MouseScrolling.IsEnabled="True"> <Canvas Width="740" Height="1200"> <Ellipse Canvas.Left="100" Canvas.Top="100" Fill="Red" /> <Ellipse Canvas.Left="200" Canvas.Top="200" Fill="Green" /> <Ellipse Canvas.Left="300" Canvas.Top="300" Fill="Blue" /> <Ellipse Canvas.Left="200" Canvas.Top="400" Fill="Red" /> <Ellipse Canvas.Left="100" Canvas.Top="500" Fill="Green" /> <Ellipse Canvas.Left="200" Canvas.Top="600" Fill="Blue" /> <Ellipse Canvas.Left="300" Canvas.Top="700" Fill="Red" /> <Ellipse Canvas.Left="200" Canvas.Top="800" Fill="Green" /> <Ellipse Canvas.Left="100" Canvas.Top="900" Fill="Blue" /> <Ellipse Canvas.Left="200" Canvas.Top="1000" Fill="Red" /> </Canvas> </ScrollViewer> </Grid> </Window> |
