Function pick_resize_handle

perro_editor/res/scripts/scene/editor_viewport.rs:2499–2516

(
    ctx: &mut ScriptContext<'_, API>,
    pointer: ViewportPointer,
)

    ctx: &mut ScriptContext<'_, API>,
    root: NodeID,
) -> bool {
    let Some(panel) = find_named(ctx, "viewport_panel") else {
        return false;
    };
    if ctx
        .run
        .Nodes()
        .with_base_node::<UiNode, _, _>(root, |_| ())
        .is_some()
    {
        let _ = ctx.run.Nodes().reparent(panel, root);
        let canvas_size = ui_canvas_size_ratio(
            viewport_window_aspect(ctx),
            1.0,
            with_state!(ctx.run, EditorState, ctx.id, editor_layout).unwrap_or_default(),
        );
        let _ = with_base_node_mut!(ctx.run, UiNode, root, |node| {
            node.layout.anchor = UiAnchor::Center;
            node.layout.size = UiVector2::ratio(canvas_size.0, canvas_size.1);
            node.transform.position = UiVector2::percent(50.0, 50.0);
            node.transform.pivot = UiVector2::percent(50.0, 50.0);