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import CLASS from './class';
import { ChartInternal } from './core';

ChartInternal.prototype.selectPoint = function (target, d, i) {
    var $$ = this, config = $$.config,
        cx = (config.axis_rotated ? $$.circleY : $$.circleX).bind($$),
        cy = (config.axis_rotated ? $$.circleX : $$.circleY).bind($$),
        r = $$.pointSelectR.bind($$);
    config.data_onselected.call($$.api, d, target.node());
    // add selected-circle on low layer g
    $$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i)
        .data([d])
        .enter().append('circle')
        .attr("class", function () { return $$.generateClass(CLASS.selectedCircle, i); })
        .attr("cx", cx)
        .attr("cy", cy)
        .attr("stroke", function () { return $$.color(d); })
        .attr("r", function (d) { return $$.pointSelectR(d) * 1.4; })
        .transition().duration(100)
        .attr("r", r);
};
ChartInternal.prototype.unselectPoint = function (target, d, i) {
    var $$ = this;
    $$.config.data_onunselected.call($$.api, d, target.node());
    // remove selected-circle from low layer g
    $$.main.select('.' + CLASS.selectedCircles + $$.getTargetSelectorSuffix(d.id)).selectAll('.' + CLASS.selectedCircle + '-' + i)
        .transition().duration(100).attr('r', 0)
        .remove();
};
ChartInternal.prototype.togglePoint = function (selected, target, d, i) {
    selected ? this.selectPoint(target, d, i) : this.unselectPoint(target, d, i);
};
ChartInternal.prototype.selectPath = function (target, d) {
    var $$ = this;
    $$.config.data_onselected.call($$, d, target.node());
    if ($$.config.interaction_brighten) {
        target.transition().duration(100)
            .style("fill", function () { return $$.d3.rgb($$.color(d)).brighter(0.75); });
    }
};
ChartInternal.prototype.unselectPath = function (target, d) {
    var $$ = this;
    $$.config.data_onunselected.call($$, d, target.node());
    if ($$.config.interaction_brighten) {
        target.transition().duration(100)
            .style("fill", function () { return $$.color(d); });
    }
};
ChartInternal.prototype.togglePath = function (selected, target, d, i) {
    selected ? this.selectPath(target, d, i) : this.unselectPath(target, d, i);
};
ChartInternal.prototype.getToggle = function (that, d) {
    var $$ = this, toggle;
    if (that.nodeName === 'circle') {
        if ($$.isStepType(d)) {
            // circle is hidden in step chart, so treat as within the click area
            toggle = function () {}; // TODO: how to select step chart?
        } else {
            toggle = $$.togglePoint;
        }
    }
    else if (that.nodeName === 'path') {
        toggle = $$.togglePath;
    }
    return toggle;
};
ChartInternal.prototype.toggleShape = function (that, d, i) {
    var $$ = this, d3 = $$.d3, config = $$.config,
        shape = d3.select(that), isSelected = shape.classed(CLASS.SELECTED),
        toggle = $$.getToggle(that, d).bind($$);

if (config.data_selection_enabled && config.data_selection_isselectable(d)) {
        if (!config.data_selection_multiple) {
            $$.main.selectAll('.' + CLASS.shapes + (config.data_selection_grouped ? $$.getTargetSelectorSuffix(d.id) : "")).selectAll('.' + CLASS.shape).each(function (d, i) {
                var shape = d3.select(this);
                if (shape.classed(CLASS.SELECTED)) { toggle(false, shape.classed(CLASS.SELECTED, false), d, i); }
            });
        }
        shape.classed(CLASS.SELECTED, !isSelected);
        toggle(!isSelected, shape, d, i);
    }
};

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