concinnity-dev 0.19.119

The Concinnity dev tooling library: world authoring, the in-engine editor, the debug server, docs and packaging
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//! The editor's in-engine mouse cursor: a single `follow_cursor` Sprite the
//! overlay draws as an arrow, or as a resize cursor over a resizable panel's edge
//! (the hook publishes the shape through the `DesiredCursor` resource). While it
//! is visible the overlay hides the OS cursor for it (its `want_ui_cursor` path),
//! so the pointer stays managed in-engine and looks identical on every backend.

use concinnity_core::components::Sprite;
use concinnity_core::ecs::World;
use concinnity_core::ecs::asset_id::AssetId;

use crate::editor::hud_ids::{Family, family_base};
use crate::editor::widget;

pub(crate) const CURSOR: AssetId = AssetId(family_base(Family::Cursor));

// Cursor height in reference pixels; the overlay scales it for the viewport.
const CURSOR_PX: f32 = 20.0;
// A light fill so the arrow reads over the dark editor chrome and the scene; the
// overlay picks a contrasting outline for it.
const FILL: [f32; 4] = [0.95, 0.95, 0.97, 1.0];

// The injected cursor sprite, hidden until the tick shows it.
pub(crate) fn sprite() -> (AssetId, Sprite) {
    let cursor = Sprite {
        follow_cursor: true,
        width: CURSOR_PX,
        height: CURSOR_PX,
        tint: FILL,
        visible: false,
        ..Default::default()
    };
    (CURSOR, cursor)
}

// Show or hide the cursor sprite for this frame: shown while the editor owns the
// pointer (edit mode), hidden while a captured camera owns it so no stray arrow
// lingers over the frozen pointer.
pub(crate) fn set_visible(world: &mut World, visible: bool) {
    widget::set_sprite_visible(world, CURSOR, visible);
}