■ UIElement 클래스의 MouseMove/DragEnter/DragLeave/DragOver/Drop 이벤트를 사용해 드래그 & 드롭을 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="TestProject" FontFamily="나눔고딕코딩" FontSize="16"> <Grid Margin="10"> <Grid.RowDefinitions> <RowDefinition Height="*" /> <RowDefinition Height="Auto" /> </Grid.RowDefinitions> <Grid.ColumnDefinitions> <ColumnDefinition Width="*" /> <ColumnDefinition Width="*" /> </Grid.ColumnDefinitions> <Ellipse Name="sourceEllipse" Grid.Row="0" Grid.Column="0" Height="200" Width="200" Fill="Green" /> <Ellipse Name="targetEllipse" Grid.Row="0" Grid.Column="1" Height="200" Width="200" Fill="Blue" AllowDrop="True" /> <Button Name="resetButton" Grid.Row="1" Grid.Column="0" Grid.ColumnSpan="2" HorizontalAlignment="Center" Margin="0 10 0 0" Width="100" Height="30" Content="재설정" /> </Grid> </Window> |
▶ MainWindow.xaml.cs
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using System.Windows; using System.Windows.Input; using System.Windows.Media; using System.Windows.Shapes; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 이전 채우기 브러시 /// </summary> private Brush previousTargetBrush = null; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); this.sourceEllipse.MouseMove += sourceEllipse_MouseMove; this.targetEllipse.DragEnter += targetEllipse_DragEnter; this.targetEllipse.DragLeave += targetEllipse_DragLeave; this.targetEllipse.DragOver += targetEllipse_DragOver; this.targetEllipse.Drop += targetEllipse_Drop; this.resetButton.Click += resetButton_Click; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 소스 타원 마우스 이동시 처리하기 - sourceEllipse_MouseMove(sender, e) /// <summary> /// 소스 타원 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void sourceEllipse_MouseMove(object sender, MouseEventArgs e) { Ellipse sourceEllipse = sender as Ellipse; if(sourceEllipse != null && e.LeftButton == MouseButtonState.Pressed) { DragDrop.DoDragDrop(sourceEllipse, sourceEllipse.Fill.ToString(), DragDropEffects.Copy); } } #endregion #region 타겟 타원 드래그 진입시 처리하기 - targetEllipse_DragEnter(sender, e) /// <summary> /// 타겟 타원 드래그 진입시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetEllipse_DragEnter(object sender, DragEventArgs e) { Ellipse targetEllipse = sender as Ellipse; if(targetEllipse != null) { this.previousTargetBrush = targetEllipse.Fill; if(e.Data.GetDataPresent(DataFormats.StringFormat)) { string sourceData = (string)e.Data.GetData(DataFormats.StringFormat); BrushConverter converter = new BrushConverter(); if(converter.IsValid(sourceData)) { Brush sourceBrush = (Brush)converter.ConvertFromString(sourceData); targetEllipse.Fill = sourceBrush; } } } } #endregion #region 타겟 타원 드래그 OVER 처리하기 - targetEllipse_DragOver(sender, e) /// <summary> /// 타겟 타원 드래그 OVER 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetEllipse_DragOver(object sender, DragEventArgs e) { e.Effects = DragDropEffects.None; if(e.Data.GetDataPresent(DataFormats.StringFormat)) { string sourceData = (string)e.Data.GetData(DataFormats.StringFormat); BrushConverter converter = new BrushConverter(); if(converter.IsValid(sourceData)) { e.Effects = DragDropEffects.Copy | DragDropEffects.Move; } } } #endregion #region 타겟 타원 드래그 이탈시 처리하기 - targetEllipse_DragLeave(sender, e) /// <summary> /// 타겟 타원 드래그 이탈시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetEllipse_DragLeave(object sender, DragEventArgs e) { Ellipse targetEllipse = sender as Ellipse; if(targetEllipse != null) { targetEllipse.Fill = this.previousTargetBrush; } } #endregion #region 타겟 타원 드롭시 처리하기 - targetEllipse_Drop(sender, e) /// <summary> /// 타겟 타원 드롭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void targetEllipse_Drop(object sender, DragEventArgs e) { Ellipse targetEllipse = sender as Ellipse; if(targetEllipse != null) { if(e.Data.GetDataPresent(DataFormats.StringFormat)) { string sourceData = (string)e.Data.GetData(DataFormats.StringFormat); BrushConverter converter = new BrushConverter(); if(converter.IsValid(sourceData)) { Brush sourceBrush = (Brush)converter.ConvertFromString(sourceData); targetEllipse.Fill = sourceBrush; } } } } #endregion #region 재설정 버튼 클릭시 처리하기 - resetButton_Click(sender, e) /// <summary> /// 재설정 버튼 클릭시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void resetButton_Click(object sender, RoutedEventArgs e) { this.targetEllipse.Fill = Brushes.Blue; } #endregion } } |
