NoSuchMethodError with dart.js

Issue

I’m trying to use paper.js with Dart through js.dart.

A lot seems to work, but I also need the method importSVG from paper.js. When I try to access it with js.context.paper.project.importSVG(query("#svg")); I get NoSuchMethodError. It’s somehow because the method is injected into project — see code from paper.js below.

How do I access the importSVG method from Dart?

/* paper.js */
new function() {
    function importSVG(node, clearDefs) {
            // ...
    }

    Item.inject(/** @lends Item# */{
            /**
             * Converts the passed node node into a Paper.js item and adds it to the
             * children of this item.
             *
             * @param {SVGSVGElement} node the SVG DOM node to convert
             * @return {Item} the converted Paper.js item
             */
            importSVG: function(node) {
                    return this.addChild(importSVG(node, true));
            }
    });

    Project.inject(/** @lends Project# */{
            /**
             * Converts the passed node node into a Paper.js item and adds it to the
             * active layer of this project.
             *
             * @param {SVGSVGElement} node the SVG DOM node to convert
             * @return {Item} the converted Paper.js item
             */
            importSVG: function(node) {
                    this.activate();
                    return importSVG(node, true);
            }
    });
};

Solution

Your Dart call seems correct. The comments on the question tend to show that there’s a problem with the javascript import/declaration of paper.project.importSVG.

Answered By – Alexandre Ardhuin

Answer Checked By – Mary Flores (FlutterFixes Volunteer)