WPF Commands. Textbox does not handle char mapped as a hotkey - wpf

Question

I'm stuck with wpf commands and "non-trivial" hotkeys. I want to map "+" key to some command. Within i want it to keep working with any textbox. Below is the sample
Commands.cs
public static class Commands
{
private static readonly ICommand _someCommand;
static Commands()
{
_someCommand = new RoutedCommand("cmd", typeof(Commands), new InputGestureCollection { new KeyGesture(Key.OemPlus), new KeyGesture(Key.Add) });
}
public static ICommand SomeCommand
{
get { return _someCommand; }
}
}
MainWindow.xaml
<Window x:Class="WpfHotkeysTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" xmlns:wpfHotkeysTest="clr-namespace:WpfHotkeysTest"
Title="MainWindow" Height="350" Width="525">
<Window.CommandBindings>
<CommandBinding Command="wpfHotkeysTest:Commands.SomeCommand" Executed="CommandBinding_OnExecuted"></CommandBinding>
</Window.CommandBindings>
<TextBox></TextBox>
</Window>
MainWindow.xaml.cs
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void CommandBinding_OnExecuted(object sender, ExecutedRoutedEventArgs e)
{
Debug.WriteLine("COMMAND! " + e.Source);
}
}
The problem is when im focused on the textbox it does not handle pressed "+" key before command is executed.
I want my key be displayed, but how do i achieve this in the best way?
UPD
I dont want to execute command if the key was handled by the text box.
I know there is property CanExecuteRoutingEventArgs.ContinueRouting. But it executes both command and textbox handling

Answer 1

The workaround I've found so far
public partial class MainWindow : Window
{
public MainWindow()
{
InitializeComponent();
}
private void CommandBinding_OnExecuted(object sender, ExecutedRoutedEventArgs e)
{
Debug.WriteLine("COMMAND! " + e.Source);
}
private void CommandBinding_OnCanExecute(object sender, CanExecuteRoutedEventArgs e)
{
if (IsEditableControlSelected())
{
e.ContinueRouting = true;
return;
}
e.CanExecute = true;
}
private bool IsEditableControlSelected()
{
return Keyboard.FocusedElement is TextBox;
}
}
This brings tears to my eyes, but at least this is better than nothing. Waiting for more solutions