Loaded
のイベントを処理UserControl
し、論理ツリーをたどって所有ページ/ウィンドウを見つけ、そこにバインディングを追加できます。
例えば
public partial class Bogus : UserControl
{
public Bogus()
{
Loaded += (s, e) => { HookIntoWindow(); };
InitializeComponent();
}
private void HookIntoWindow()
{
var current = this.Parent;
while (!(current is Window) && current is FrameworkElement)
{
current = ((FrameworkElement)current).Parent;
}
if (current != null)
{
var window = current as Window;
// Add input bindings
var command = new AlertCommand();
window.InputBindings.Add(new InputBinding(command, new KeyGesture(Key.D1, ModifierKeys.Control)));
}
}
}