Struct RenderTooltipPreEvent 

pub struct RenderTooltipPreEvent<'a> {
    pub draw: &'a mut dyn DrawContext,
    pub stack: Option<&'a ItemStack>,
    pub screen_width: i32,
    pub screen_height: i32,
    pub elements: &'a [TooltipElement],
    pub place: &'a mut TooltipPlace,
    pub cancelled: bool,
}

What Hooks::render_tooltip_pre is told. Each field is that hook’s argument of the same name, described in the hook’s doc.

Fields

draw: &'a mut dyn DrawContext

stack: Option<&'a ItemStack>

screen_width: i32

screen_height: i32

elements: &'a [TooltipElement]

place: &'a mut TooltipPlace

cancelled: bool

Whether the event is cancelled: by the game or an earlier listener, or by this one setting it. Only a listener that receives cancelled events (#[listener(receive_cancelled)]) sees true, and setting it back to false lets the game’s behaviour run.