mittens-engine 0.7.0

A Vulkan and OpenXR scene engine with ECS, reactive signals, and Meow Meow scripting
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use crate::engine::ecs::ComponentId;
use crate::engine::ecs::component::Component;

/// Selection opt-out marker.
///
/// Everything in an editor subtree is selectable by default. Wrapping a subtree in
/// `SelectableComponent::off()` excludes it from editor selection — clicking a descendant
/// will not move the gizmo, update the inspector context, or trigger `SelectionChanged`.
///
/// Used by editor-owned helper subtrees to self-exclude UI from scene picking.
#[derive(Debug, Clone, Copy)]
pub struct SelectableComponent {
    pub enabled: bool,
    component: Option<ComponentId>,
}

impl SelectableComponent {
    pub fn on() -> Self {
        Self {
            enabled: true,
            component: None,
        }
    }

    pub fn off() -> Self {
        Self {
            enabled: false,
            component: None,
        }
    }
}

impl Default for SelectableComponent {
    fn default() -> Self {
        Self::on()
    }
}

impl Component for SelectableComponent {
    fn set_id(&mut self, id: ComponentId) {
        self.component = Some(id);
    }

    fn name(&self) -> &'static str {
        "selectable"
    }

    fn as_any(&self) -> &dyn std::any::Any {
        self
    }

    fn as_any_mut(&mut self) -> &mut dyn std::any::Any {
        self
    }

    fn to_mms_ast(
        &self,
        _world: &crate::engine::ecs::World,
    ) -> crate::scripting::ast::ComponentExpression {
        use crate::engine::ecs::component::ce_helpers::*;
        let ctor = if self.enabled { "on" } else { "off" };
        ce_call("Selectable", ctor, vec![])
    }
}