c3_chart_internal_fn.generateEventRectsForMultipleXs = function()

in TestApplications/Web/js/lib/components/c3-0.4.2/src/interaction.js [237:335]
72 lines of code
20 McCabe index (conditional complexity)

c3_chart_internal_fn.generateEventRectsForMultipleXs = function (eventRectEnter) {
    var $$ = this, d3 = $$.d3, config = $$.config;

    function mouseout() {
        $$.svg.select('.' + CLASS.eventRect).style('cursor', null);
        $$.hideXGridFocus();
        $$.hideTooltip();
        $$.unexpandCircles();
        $$.unexpandBars();
    }

    eventRectEnter.append('rect')
        .attr('x', 0)
        .attr('y', 0)
        .attr('width', $$.width)
        .attr('height', $$.height)
        .attr('class', CLASS.eventRect)
        .on('mouseout', function () {
            if ($$.hasArcType()) { return; }
            mouseout();
        })
        .on('mousemove', function () {
            var targetsToShow = $$.filterTargetsToShow($$.data.targets);
            var mouse, closest, sameXData, selectedData;

            if ($$.dragging) { return; } // do nothing when dragging
            if ($$.hasArcType(targetsToShow)) { return; }

            mouse = d3.mouse(this);
            closest = $$.findClosestFromTargets(targetsToShow, mouse);

            if ($$.mouseover && (!closest || closest.id !== $$.mouseover.id)) {
                config.data_onmouseout.call($$, $$.mouseover);
                $$.mouseover = undefined;
            }

            if (! closest) {
                mouseout();
                return;
            }

            if ($$.isScatterType(closest) || !config.tooltip_grouped) {
                sameXData = [closest];
            } else {
                sameXData = $$.filterByX(targetsToShow, closest.x);
            }

            // show tooltip when cursor is close to some point
            selectedData = sameXData.map(function (d) {
                return $$.addName(d);
            });
            $$.showTooltip(selectedData, mouse);

            // expand points
            if (config.point_focus_expand_enabled) {
                $$.expandCircles(closest.index, closest.id, true);
            }
            $$.expandBars(closest.index, closest.id, true);

            // Show xgrid focus line
            $$.showXGridFocus(selectedData);

            // Show cursor as pointer if point is close to mouse position
            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < 100) {
                $$.svg.select('.' + CLASS.eventRect).style('cursor', 'pointer');
                if (!$$.mouseover) {
                    config.data_onmouseover.call($$, closest);
                    $$.mouseover = closest;
                }
            }
        })
        .on('click', function () {
            var targetsToShow = $$.filterTargetsToShow($$.data.targets);
            var mouse, closest;

            if ($$.hasArcType(targetsToShow)) { return; }

            mouse = d3.mouse(this);
            closest = $$.findClosestFromTargets(targetsToShow, mouse);

            if (! closest) { return; }

            // select if selection enabled
            if ($$.isBarType(closest.id) || $$.dist(closest, mouse) < 100) {
                $$.main.selectAll('.' + CLASS.shapes + $$.getTargetSelectorSuffix(closest.id)).select('.' + CLASS.shape + '-' + closest.index).each(function () {
                    if (config.data_selection_grouped || $$.isWithinShape(this, closest)) {
                        $$.toggleShape(this, closest, closest.index);
                        $$.config.data_onclick.call($$.api, closest, this);
                    }
                });
            }
        })
        .call(
            d3.behavior.drag().origin(Object)
                .on('drag', function () { $$.drag(d3.mouse(this)); })
                .on('dragstart', function () { $$.dragstart(d3.mouse(this)); })
                .on('dragend', function () { $$.dragend(); })
        );
};