■ UIElement 클래스의 MouseDown/MouseMove/MouseUp 이벤트를 사용해 엘리먼트를 이동시키는 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="UIElement 클래스 : MouseDown/MouseMove/MouseUp 이벤트를 사용해 엘리먼트 이동시키기" FontFamily="나눔고딕코딩" FontSize="16"> <Canvas> <Label Name="label" Canvas.Left="100" Canvas.Top="100" Padding="10" Background="Goldenrod" Content="Label" /> </Canvas> </Window> |
▶ MainWindow.xaml.cs
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using System.Windows; using System.Windows.Controls; using System.Windows.Input; namespace TestProject { /// <summary> /// 메인 윈도우 /// </summary> public partial class MainWindow : Window { //////////////////////////////////////////////////////////////////////////////////////////////////// Field ////////////////////////////////////////////////////////////////////////////////////////// Private #region Field /// <summary> /// 베이스 포인트 /// </summary> private Point basePoint = new Point(0.0, 0.0); /// <summary> /// 엘리먼트 내 마우스 포인트 /// </summary> private Point mousePointInElement; /// <summary> /// 델타 X /// </summary> private double deltaX = 0.0; /// <summary> /// 델타 Y /// </summary> private double deltaY = 0.0; /// <summary> /// 드래그 여부 /// </summary> private bool isDragging = false; #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Constructor ////////////////////////////////////////////////////////////////////////////////////////// Public #region 생성자 - MainWindow() /// <summary> /// 생성자 /// </summary> public MainWindow() { InitializeComponent(); this.label.MouseDown += label_MouseDown; this.label.MouseMove += label_MouseMove; this.label.MouseUp += label_MouseUp; } #endregion //////////////////////////////////////////////////////////////////////////////////////////////////// Method ////////////////////////////////////////////////////////////////////////////////////////// Private #region 레이블 마우스 DOWN 처리하기 - label_MouseDown(sender, e) /// <summary> /// 레이블 마우스 DOWN 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void label_MouseDown(object sender, MouseButtonEventArgs e) { Label label = e.Source as Label; if(label != null) { label.CaptureMouse(); this.isDragging = true; this.mousePointInElement = e.GetPosition(label); } } #endregion #region 레이블 마우스 이동시 처리하기 - label_MouseMove(sender, e) /// <summary> /// 레이블 마우스 이동시 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void label_MouseMove(object sender, MouseEventArgs e) { if(this.isDragging) { Point mousePoint = e.GetPosition(null); this.deltaX = mousePoint.X - this.basePoint.X - this.mousePointInElement.X; this.deltaY = mousePoint.Y - this.basePoint.Y - this.mousePointInElement.Y; Canvas.SetLeft(this.label, this.basePoint.X + this.deltaX); Canvas.SetTop (this.label, this.basePoint.Y + this.deltaY); } } #endregion #region 레이블 마우스 UP 처리하기 - label_MouseUp(sender, e) /// <summary> /// 레이블 마우스 UP 처리하기 /// </summary> /// <param name="sender">이벤트 발생자</param> /// <param name="e">이벤트 인자</param> private void label_MouseUp(object sender, MouseButtonEventArgs e) { Label label = e.Source as Label; if(label != null) { label.ReleaseMouseCapture(); this.basePoint.X += deltaX; this.basePoint.Y += deltaY; this.deltaX = 0.0; this.deltaY = 0.0; this.isDragging = false; } } #endregion } } |
