zuzu-rust 0.4.0

Rust implementation of ZuzuScript
Documentation 
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from test/more import *;

requires_capability( "gui" );

from std/gui import *;

let parent := VBox(
	id: "temporary-parent",
	Button( id: "temporary-child" ),
);
let child := parent.children()[0];
is( child.parent(), parent, "child sees live widget parent" );
parent := null;
is( child.parent(), null, "retained child does not keep widget parent alive" );

let w := Window(
	VBox(
		id: "root",
		Button( id: "submit" ),
	),
);
let button := w.find_by_id("submit");
let seen := [];
let token := button.on( "click", function ( e ) {
	seen.push( e.target() );
	seen.push( e.current_target() );
	seen.push( e.window() );
} );
button.click();
is( seen[0], button, "event target resolves during dispatch" );
is( seen[1], button, "event current_target resolves during dispatch" );
is( seen[2], w, "event window resolves through weak parent links" );
ok( button.off(token), "listener token can remove live owner listener" );
button.click();
is( seen.length(), 3, "removed listener does not fire again" );

done_testing();