I'm trying to understand how to use RoutedCommands. I was under the impression that if I don't specify a CommandTarget on the Button, any focused element will receive the command. But for some reason it doesn't work. Here is the xaml that doesn't work:
<Window x:Class="WpfTest11_Commands2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox Height="177" HorizontalAlignment="Left"
Margin="12,12,0,0" Name="textBox1" VerticalAlignment="Top" Width="233" AcceptsReturn="True" />
<TextBox Height="177" HorizontalAlignment="Left"
Margin="258,12,0,0" Name="textBox2" VerticalAlignment="Top" Width="233" AcceptsReturn="True" />
<Button Content="Cut"
Height="23" HorizontalAlignment="Left" Margin="12,195,0,0" Name="button1" VerticalAlignment="Top" Width="75"
Command="ApplicationCommands.Cut"/>
</Grid>
</Window>
If I add CommandTarget to the Button it works, but only for the textbox that is specified of course.
<Window x:Class="WpfTest11_Commands2.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
Title="MainWindow" Height="350" Width="525">
<Grid>
<TextBox Height="177" HorizontalAlignment="Left" Margin="12,12,0,0" Name="textBox1" VerticalAlignment="Top" Width="233" AcceptsReturn="True" />
<TextBox Height="177" HorizontalAlignment="Left" Margin="258,12,0,0" Name="textBox2" VerticalAlignment="Top" Width="233" AcceptsReturn="True" />
<Button Content="Cut"
Height="23" HorizontalAlignment="Left" Margin="12,195,0,0" Name="button1" VerticalAlignment="Top" Width="75"
Command="ApplicationCommands.Cut"
CommandTarget="{Binding ElementName=textBox1}"/>
</Grid>
</Window>
How can I make any focused element receive the command?
Thanks!
You must set
FocusManager.IsFocusScope
toTrue
.According to http://msdn.microsoft.com/en-us/magazine/cc785480.aspx, the reason for that is this:
If
IsFocusScope="False"
, the command invoker looks for a command binding between its own location in the visual tree and the root of the visual tree.If
IsFocusScope="True"
, the command invoker also looks along the visual tree path from the root to the focus element for a command binding.