■ ScrollViewer 클래스에서 마우스를 사용해 스크롤을 하는 방법을 보여준다.
▶ 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="ScrollViewer 클래스 : 마우스를 사용해 스크롤하기"> <Window.Resources> <Style x:Key="ScrollViewerStyleKey" TargetType="{x:Type ScrollViewer}"> <Setter Property="HorizontalScrollBarVisibility" Value="Hidden" /> <Setter Property="VerticalScrollBarVisibility" Value="Hidden" /> </Style> </Window.Resources> <Grid Margin="0"> <ScrollViewer Name="scrollViewer" Style="{StaticResource ScrollViewerStyleKey}"> <ItemsControl Name="itemsControl" VerticalAlignment="Center"> <ItemsControl.ItemsPanel> <ItemsPanelTemplate> <StackPanel Orientation="Vertical" /> </ItemsPanelTemplate> </ItemsControl.ItemsPanel> </ItemsControl> </ScrollViewer> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System; using System.Windows; using System.Windows.Controls; using System.Windows.Input; using System.Windows.Media; using System.Windows.Shapes; using System.Windows.Threading; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 마찰 저항 /// </summary> private double friction; /// <summary> /// 디스패처 타이머 /// </summary> private DispatcherTimer dispatcherTimer = new DispatcherTimer(); /// <summary> /// 속도 /// </summary> private Vector velocity; /// <summary> /// 이전 포인트 /// </summary> private Point previousPoint; /// <summary> /// 스크롤 타겟 포인트 /// </summary> private Point scrollTargetPoint; /// <summary> /// 스크롤 시작 포인트 /// </summary> private Point scrollStartPoint; /// <summary> /// 스크롤 시작 오프셋 /// </summary> private Point scrollStartOffset; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); SetItemsControlData(); this.friction = 0.95; this.dispatcherTimer = new DispatcherTimer(); this.dispatcherTimer.Interval = new TimeSpan(0, 0, 0, 0, 20); this.dispatcherTimer.Tick += dispatcherTimer_Tick; this.dispatcherTimer.Start(); } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Protected //////////////////////////////////////////////////////////////////////////////// Function #region 마우스 DOWN PREVIEW 처리하기 - OnPreviewMouseDown(e) /// <summary> /// 마우스 DOWN PREVIEW 처리하기 /// </summary> /// <param name="e">이벤트 인자</param> protected override void OnPreviewMouseDown(MouseButtonEventArgs e) { if(this.scrollViewer.IsMouseOver) { this.scrollStartPoint = e.GetPosition(this); this.scrollStartOffset.X = this.scrollViewer.HorizontalOffset; this.scrollStartOffset.Y = this.scrollViewer.VerticalOffset; Cursor = (this.scrollViewer.ExtentWidth > scrollViewer.ViewportWidth) || (scrollViewer.ExtentHeight > scrollViewer.ViewportHeight) ? Cursors.ScrollAll : Cursors.Arrow; CaptureMouse(); } base.OnPreviewMouseDown(e); } #endregion #region 마우스 이동시 PREVIEW 처리하기 - OnPreviewMouseMove(e) /// <summary> /// 마우스 이동시 PREVIEW 처리하기 /// </summary> /// <param name="e">이벤트 인자</param> protected override void OnPreviewMouseMove(MouseEventArgs e) { if(IsMouseCaptured) { Point mousePoint = e.GetPosition(this); Point deltaPoint = new Point(this.scrollStartPoint.X - mousePoint.X, this.scrollStartPoint.Y - mousePoint.Y); this.scrollTargetPoint.X = this.scrollStartOffset.X + deltaPoint.X; this.scrollTargetPoint.Y = this.scrollStartOffset.Y + deltaPoint.Y; this.scrollViewer.ScrollToHorizontalOffset(this.scrollTargetPoint.X); this.scrollViewer.ScrollToVerticalOffset (this.scrollTargetPoint.Y); } base.OnPreviewMouseMove(e); } #endregion #region 마우스 UP PREVIEW 처리하기 - OnPreviewMouseUp(e) /// <summary> /// 마우스 UP PREVIEW 처리하기 /// </summary> /// <param name="e">이벤트 인자</param> protected override void OnPreviewMouseUp(MouseButtonEventArgs e) { if(IsMouseCaptured) { Cursor = Cursors.Arrow; ReleaseMouseCapture(); } base.OnPreviewMouseUp(e); } #endregion ////////////////////////////////////////////////////////////////////////////////////////// Private //////////////////////////////////////////////////////////////////////////////// Event #region 디스패처 타이머 틱 처리하기 - dispatcherTimer_Tick(sender, e) /// <summary> /// 디스패처 타이머 틱 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void dispatcherTimer_Tick(object sender, EventArgs e) { if(IsMouseCaptured) { Point mousePoint = Mouse.GetPosition(this); this.velocity = this.previousPoint - mousePoint; this.previousPoint = mousePoint; } else { if(this.velocity.Length > 1) { this.scrollViewer.ScrollToHorizontalOffset(this.scrollTargetPoint.X); this.scrollViewer.ScrollToVerticalOffset (this.scrollTargetPoint.Y); this.scrollTargetPoint.X += this.velocity.X; this.scrollTargetPoint.Y += this.velocity.Y; this.velocity *= this.friction; } } } #endregion //////////////////////////////////////////////////////////////////////////////// Function #region 스택 패널 구하기 - GetStackPanel(brush) /// <summary> /// 스택 패널 구하기 /// </summary> /// <param name="brush">브러시</param> /// <returns>스택 패널</returns> private StackPanel GetStackPanel(SolidColorBrush brush) { StackPanel stackPanel = new StackPanel(); stackPanel.Orientation = Orientation.Horizontal; for(int i = 0; i < 50; i++) { Rectangle rectangle = new Rectangle(); rectangle.Width = 100; rectangle.Height = 100; rectangle.Margin = new Thickness(5); rectangle.Fill = i % 2 == 0 ? Brushes.LightGray : brush; stackPanel.Children.Add(rectangle); } return stackPanel; } #endregion #region 항목 컨트롤 데이터 설정하기 - SetItemsControlData() /// <summary> /// 항목 컨트롤 데이터 설정하기 /// </summary> private void SetItemsControlData() { this.itemsControl.Items.Clear(); this.itemsControl.Items.Add(GetStackPanel(Brushes.Red )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Green)); this.itemsControl.Items.Add(GetStackPanel(Brushes.Blue )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Red )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Green)); this.itemsControl.Items.Add(GetStackPanel(Brushes.Blue )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Red )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Green)); this.itemsControl.Items.Add(GetStackPanel(Brushes.Blue )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Red )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Green)); this.itemsControl.Items.Add(GetStackPanel(Brushes.Blue )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Red )); this.itemsControl.Items.Add(GetStackPanel(Brushes.Green)); this.itemsControl.Items.Add(GetStackPanel(Brushes.Blue )); } #endregion } } |
