Function doScroll

test/jasmine/tests/cartesian_interact_test.js:334–349

(subplot, directions, deltaY, opts)

    }

    function doScroll(subplot, directions, deltaY, opts) {
        return function() {
            opts = opts || {};
            var edge = opts.edge || '';
            var dx = opts.dx || 0;
            var dy = opts.dy || 0;
            var dragger = getDragger(subplot, directions);
            var coords = getNodeCoords(dragger, edge);
            var nsteps = opts.nsteps || 1;

            for(var i = 1; i <= nsteps; i++) {
                mouseEvent('scroll', coords.x + dx, coords.y + dy, {deltaY: deltaY / nsteps * i, element: dragger});
            }
            return delay(constants.REDRAWDELAY + 10)();
        };
    }

    function makeDragFns(subplot, directions, dx, dy, x0, y0) {
        var dragger = getDragger(subplot, directions);