Mega Code Archive
The mouse-related event handlers for implementing drag-and-drop
<![CDATA[
<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'>
<Canvas x:Name="LayoutRoot" Background="Black">
<TextBlock x:Name="myTextBlock" Foreground="White" Text="Waiting..." MouseLeftButtonDown="MyTextBlock_MouseLeftButtonDown" MouseMove="MyTextBlock_MouseMove" MouseLeftButtonUp="MyTextBlock_MouseLeftButtonUp" />
</Canvas>
</UserControl>
//File: Page.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
using System.Net;
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
{
private bool isMouseDown = false;
private Point lastPoint = new Point();
private Point offset = new Point();
public MainPage()
{
InitializeComponent();
}
public void MyTextBlock_MouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
myTextBlock.CaptureMouse();
isMouseDown = true;
lastPoint = e.GetPosition(null);
offset.X = lastPoint.X - Convert.ToDouble(myTextBlock.GetValue(Canvas.LeftProperty));
offset.Y = lastPoint.Y - Convert.ToDouble(myTextBlock.GetValue(Canvas.TopProperty));
}
public void MyTextBlock_MouseMove(object sender, MouseEventArgs e)
{
if (isMouseDown == true)
{
lastPoint = e.GetPosition(null);
myTextBlock.SetValue(Canvas.LeftProperty, (lastPoint.X-offset.X));
myTextBlock.SetValue(Canvas.TopProperty, (lastPoint.Y-offset.Y));
}
}
public void MyTextBlock_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
{
myTextBlock.ReleaseMouseCapture();
isMouseDown = false;
}
}
}
]]>