three.js/editor/js/Toolbar.js

/**
 * @author mrdoob / http://mrdoob.com/
 */

var Toolbar = function ( editor ) {

	var signals = editor.signals;

	var container = new UI.Panel();
	container.setId( 'toolbar' );

	var buttons = new UI.Panel();
	container.add( buttons );

	// translate / rotate / scale

	var translate = new UI.Button( 'translate' );
	translate.dom.title = 'W';
	translate.dom.className = 'Button selected';
	translate.onClick( function () {

		signals.transformModeChanged.dispatch( 'translate' );

	} );
	buttons.add( translate );

	var rotate = new UI.Button( 'rotate' );
	rotate.dom.title = 'E';
	rotate.onClick( function () {

		signals.transformModeChanged.dispatch( 'rotate' );

	} );
	buttons.add( rotate );

	var scale = new UI.Button( 'scale' );
	scale.dom.title = 'R';
	scale.onClick( function () {

		signals.transformModeChanged.dispatch( 'scale' );

	} );
	buttons.add( scale );

	signals.transformModeChanged.add( function ( mode ) {

		translate.dom.classList.remove( 'selected' );
		rotate.dom.classList.remove( 'selected' );
		scale.dom.classList.remove( 'selected' );

		switch ( mode ) {

			case 'translate': translate.dom.classList.add( 'selected' ); break;
			case 'rotate': rotate.dom.classList.add( 'selected' ); break;
			case 'scale': scale.dom.classList.add( 'selected' ); break;

		}

	} );

	return container;

};