Right now I'm working on a lite drawing app for iOS and Android using Xamarin forms. So far I've been able to get the actual drawing aspect done with a custom UI view and renderer by way of this pretty awesome tutorial: http://www.infinite-x.net/2014/06/05/creating-a-drawing-app-using-xamarin-forms/
Now I'd like to start doing things like clearing the view, saving the file, etc. I can figure out how to do these things in the actual platform projects. What I don't get is how to, say... connect the 'clear' action to a Xamarin forms button. I'm pretty sure I can think of some ways to do this (say, a custom button using an interface that has a reference passed to it from the needed classes/variables), but I figured I'd ask in case there was a better and standard way to pull this off.