One of the things standing in my way of adopting this control is the fact that the blurred image is static. If the view behind the menu changes, it breaks the whole effect. So I was thinking even just a simple timer that refreshes the blur image every x milliseconds would be a simple way to achieve that. I don't know what the performance hit would be. I've been intending to implement it myself but haven't had the chance so thought I'd suggest it in case you've already considered this.
One of the things standing in my way of adopting this control is the fact that the blurred image is static. If the view behind the menu changes, it breaks the whole effect. So I was thinking even just a simple timer that refreshes the blur image every x milliseconds would be a simple way to achieve that. I don't know what the performance hit would be. I've been intending to implement it myself but haven't had the chance so thought I'd suggest it in case you've already considered this.