Touchscreen

A touchscreen is just a screen that you can touch. Central to this crate is the Touchscreen trait:

pub trait Touchscreen:
    embedded_graphics_core::prelude::DrawTarget +
    embedded_graphics_core::prelude::OriginDimensions {
        type TouchError;

        fn get_touch_event(&mut self) -> Result<Option<TouchEvent>, Self::TouchError>;
    }

It is overly simple right now, it is more of a tentative starting point. There are 2 implementations, which can be selected by feature flags:

• xpt2046-screen: A screen that combines XPT2046 (touch) with arbitrary embedded-graphics DrawTarget.
• web-screen: A screen that marries WebSimulatorDisplay with mouse event handlers bound to a container element.
• sdl-screen: SimulatorDisplay adapted to Touchscreen. Unfinished

Todo

• Support touchscreens that can signal touch with interrupt
• Finish SDL touchscreen
• Clean up web_screen, propagate mouse handling errors