Mega Code Archive
Halting event routing with Handled
<![CDATA[
<Window x:Class="WpfApplication1.HaltingEvents"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="Halting Events" Height="300" Width="300">
<Grid HorizontalAlignment="Center" VerticalAlignment="Center">
<Button PreviewMouseDown="PreviewMouseDownButton"
MouseDown="MouseDownButton">
<Grid PreviewMouseDown="PreviewMouseDownGrid"
MouseDown="MouseDownGrid">
<Grid.ColumnDefinitions>
<ColumnDefinition />
<ColumnDefinition />
</Grid.ColumnDefinitions>
<Canvas PreviewMouseDown="PreviewMouseDownCanvas"
MouseDown="ButtonDownCanvas"
Width="20" Height="18" VerticalAlignment="Center">
<Ellipse PreviewMouseDown="PreviewMouseDownEllipse"
MouseDown="MouseDownEllipse"
x:Name="myEllipse"
Canvas.Left="1" Canvas.Top="1" Width="16" Height="16"
Fill="Yellow" Stroke="Black" />
<Ellipse Canvas.Left="4.5" Canvas.Top="5" Width="2.5" Height="3"
Fill="Black" />
<Ellipse Canvas.Left="11" Canvas.Top="5" Width="2.5" Height="3"
Fill="Black" />
<Path Data="M 5,10 A 3,3 0 0 0 13,10" Stroke="Black" />
</Canvas>
<TextBlock Grid.Column="1">Click!</TextBlock>
</Grid>
</Button>
</Grid>
</Window>
//File:Window.xaml.cs
using System;
using System.Windows;
using System.Diagnostics;
namespace WpfApplication1
{
public partial class HaltingEvents : System.Windows.Window
{
public HaltingEvents()
{
InitializeComponent();
}
void ButtonDownCanvas(object sender, RoutedEventArgs e)
{
Debug.WriteLine("ButtonDownCanvas");
e.Handled = true;
}
void PreviewMouseDownButton(object sender, RoutedEventArgs e)
{ Debug.WriteLine("PreviewMouseDownButton"); }
void MouseDownButton(object sender, RoutedEventArgs e)
{ Debug.WriteLine("MouseDownButton"); }
void PreviewMouseDownGrid(
object sender, RoutedEventArgs e)
{ Debug.WriteLine("PreviewMouseDownGrid"); }
void MouseDownGrid(object sender, RoutedEventArgs e)
{ Debug.WriteLine("MouseDownGrid"); }
void PreviewMouseDownCanvas(object sender, RoutedEventArgs e)
{ Debug.WriteLine("PreviewMouseDownCanvas"); }
void PreviewMouseDownEllipse(object sender, RoutedEventArgs e)
{ Debug.WriteLine("PreviewMouseDownEllipse"); }
void MouseDownEllipse(object sender, RoutedEventArgs e)
{ Debug.WriteLine("MouseDownEllipse"); }
}
}
]]>