Trait kernel::hil::touch::MultiTouch

source · [−]

pub trait MultiTouch<'a> {
    fn enable(&self) -> Result<(), ErrorCode>;
    fn disable(&self) -> Result<(), ErrorCode>;
    fn get_num_touches(&self) -> usize;
    fn get_touch(&self, index: usize) -> Option<TouchEvent>;
    fn set_client(&self, multi_touch_client: &'a dyn MultiTouchClient);
}

Expand description

Multi-touch panels should implement this

Required Methods

fn enable(&self) -> Result<(), ErrorCode>

Enable the touche panel

returns Ok(()) even if device is already enabled

fn disable(&self) -> Result<(), ErrorCode>

Disable the touch panel

returns Ok(()) even if device is already disabled

fn get_num_touches(&self) -> usize

Returns the number of maximum concurently supported touches.

fn get_touch(&self, index: usize) -> Option<TouchEvent>

Returns the touch event at index or None.

This function must be called in the same interrupt as the event, otherwise data might not be available.

fn set_client(&self, multi_touch_client: &'a dyn MultiTouchClient)

Set the multi-touch client

Implementors