RadSplitButton: How to get the Key pressen when DropDownClosed

[Peter]

I'm using a WPF RadSplitButton and I'd like to to some special handling, when the DropDownClosed happens:

If the User presses ESC to close the dropped down content of my RadSplitButton, I'd like to do some undo operations. How do I get the Key that has caused the RadSplitBotton to close it's DropDown section?

In the Event Handler

        private void RadSplitButton_DropDownClosed(object sender, RoutedEventArgs e)
        {}

there is only RoutedEventArgs, which does not contain the pressed Button.

[Martin Ivanov]

Hi Peter,

In order to achieve your requirement you can use the Keyboard.IsKeyPressed() method. The method excepts a value from the Key enumeration and returns bool value. Here is an example:

private void splitBtn_DropDownClosed(object sender, RoutedEventArgs e)
{
    if (Keyboard.IsKeyDown(Key.Escape))
    {
        // do something
    }
}

If you want to get the explicit pressed key you can implement a method for this operation.

private Key GetPressedKey()
{
    var allKeys = Enum.GetValues(typeof(Key));
    Key pressedKey = Key.None;
    foreach (Key currentKey in allKeys)
    {
        if (currentKey != Key.None && Keyboard.IsKeyDown((Key)currentKey))
        {
            return currentKey;
        }
    }
    return pressedKey;
}

I hope this helps.

Regards,
Martin
Telerik