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Categories / Silverlight / Events

 

Mouse down, up and moved events

<UserControl x:Class='SilverlightApplication3.MainPage'     xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation'      xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml'     xmlns:d='http://schemas.microsoft.com/expression/blend/2008'      xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006'      mc:Ignorable='d'      d:DesignWidth='640'      d:DesignHeight='480'>     <Grid x:Name="LayoutRoot" Background="White">         <Canvas Width="400" Height="300" Background="Wheat">             <Ellipse Canvas.Top="0" Fill="Black" Width="20" Height="20" MouseLeftButtonDown="Ellipse_MouseLeftButtonDown" MouseLeftButtonUp="Ellipse_MouseLeftButtonUp" MouseMove="Ellipse_MouseMove" />             <Ellipse Canvas.Top="40" Fill="Black" Width="20" Height="20" MouseLeftButtonDown="Ellipse_MouseLeftButtonDown" MouseLeftButtonUp="Ellipse_MouseLeftButtonUp" MouseMove="Ellipse_MouseMove" />             <Ellipse Canvas.Top="80" Fill="Black" Width="20" Height="20" MouseLeftButtonDown="Ellipse_MouseLeftButtonDown" MouseLeftButtonUp="Ellipse_MouseLeftButtonUp" MouseMove="Ellipse_MouseMove" />             <Ellipse Canvas.Top="120" Fill="Black" Width="20" Height="20" MouseLeftButtonDown="Ellipse_MouseLeftButtonDown" MouseLeftButtonUp="Ellipse_MouseLeftButtonUp" MouseMove="Ellipse_MouseMove" />         </Canvas>     </Grid> </UserControl> //File: Page.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace SilverlightApplication3 {     public partial class MainPage : UserControl     {         double beginX = 0;         double beginY = 0;         bool isMouseDown = false;         public MainPage()         {             InitializeComponent();         }         private void Ellipse_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)         {             Ellipse b = sender as Ellipse;             beginX = e.GetPosition(this).X;             beginY = e.GetPosition(this).Y;             isMouseDown = true;             b.CaptureMouse();         }         private void Ellipse_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)         {             Ellipse b = sender as Ellipse;             isMouseDown = false;             b.ReleaseMouseCapture();         }         private void Ellipse_MouseMove(object sender, MouseEventArgs e)         {             if (isMouseDown)             {                 Ellipse b = sender as Ellipse;                 double currX = e.GetPosition(this).X;                 double currY = e.GetPosition(this).Y;                 b.SetValue(Canvas.LeftProperty, currX);                 b.SetValue(Canvas.TopProperty, currY);             }         }     } }