drawLegendPatch.js

drawLegendPatch.js

Y.ChartLegend.prototype._drawLegend = function()
{
    var chart = this.get("chart"),
        node,
        seriesCollection = chart.get("seriesCollection"),
        series,
        styles,
        padding,
        itemStyles,
        seriesStyles,
        hSpacing,
        vSpacing,
        direction,
        align,
        marker,
        labelStyles,
        displayName,
        layout,
        i,
        len,
        isArray,
        legendShape,
        shape,
        shapeClass,
        item,
        fill,
        border,
        fillColors,
        borderColors,
        borderWeight,
        items = [],
        markerWidth,
        markerHeight,
        totalWidth,
        totalHeight,
        maxWidth = 0,
        maxHeight = 0,
        itemWidth,
        itemHeight;
    this._destroyLegendItems();
    if(seriesCollection && seriesCollection.length > 0)
    {
        if(this._drawing)
        {
            this._callLater = true;
            return;
        }
        this._drawing = true;
        this._callLater = false;
        if(this.get("includeInChartLayout"))
        {
            this.get("chart")._itemRenderQueue.unshift(this);
        }
        node = this.get("contentBox");
        styles = this.get("styles");
        padding = styles.padding;
        itemStyles = styles.item;
        hSpacing = itemStyles.hSpacing;
        vSpacing = itemStyles.vSpacing;
        labelStyles = itemStyles.label;
        direction = this.get("direction");
        align = direction === "vertical" ? styles.vAlign : styles.hAlign;
        layout = this._layout[direction];
        marker = styles.marker;
        markerWidth = marker.width;
        markerHeight = marker.height;
        totalWidth = 0 - hSpacing;
        totalHeight = 0 - vSpacing;
        if(marker && marker.shape)
        {
            legendShape = marker.shape;
        }
        if(chart instanceof Y.PieChart)
        {
            series = seriesCollection[0];
            displayName = series.get("categoryAxis").getDataByKey(series.get("categoryKey"));
            seriesStyles = series.get("styles").marker;
            fillColors = seriesStyles.fill.colors;
            borderColors = seriesStyles.border.colors;
            borderWeight = seriesStyles.border.weight;
            i = 0;
            len = displayName.length;
            shape = legendShape || Y.Circle;
            isArray = Y.Lang.isArray(shape);
            for(; i < len; ++i)
            {
                shape = isArray ? shape[i] : shape;
                fill = {
                    color: fillColors[i]
                };
                border = {
                    colors: borderColors[i],
                    weight: borderWeight
                };
                displayName = chart.getSeriesItems(series, i).category.value;
                item = this._getLegendItem(node, this._getShapeClass(shape), fill, border, labelStyles, markerWidth, markerHeight, displayName);
                itemWidth = item.width;
                itemHeight = item.height;
                maxWidth = Math.max(maxWidth, itemWidth);
                maxHeight = Math.max(maxHeight, itemHeight);
                totalWidth += itemWidth + hSpacing;
                totalHeight += itemHeight + vSpacing;
                items.push(item);
            }
        }
        else
        {
            i = 0;
            len = seriesCollection.length;
            for(; i < len; ++i)
            {
                series = seriesCollection[i];
                seriesStyles = this._getStylesBySeriesType(series, shape);
                if(!legendShape)
                {
                    shape = seriesStyles.shape;
                    if(!shape)
                    {
                        shape = Y.Circle;
                    }
                }
                shapeClass = Y.Lang.isArray(shape) ? shape[i] : shape;
                item = this._getLegendItem(
                    node,
                    this._getShapeClass(shape),
                    seriesStyles.fill,
                    seriesStyles.border,
                    labelStyles,
                    markerWidth,
                    markerHeight,
                    series.get("valueDisplayName")
                );
                itemWidth = item.width;
                itemHeight = item.height;
                maxWidth = Math.max(maxWidth, itemWidth);
                maxHeight = Math.max(maxHeight, itemHeight);
                totalWidth += itemWidth + hSpacing;
                totalHeight += itemHeight + vSpacing;
                items.push(item);
            }
        }
        this._drawing = false;
        if(this._callLater)
        {
            this._drawLegend();
        }
        else
        {
            layout._positionLegendItems.apply(
                this,
                [items, maxWidth, maxHeight, totalWidth, totalHeight, padding, hSpacing, vSpacing, align]
            );
            this._updateBackground(styles);
            this.fire("legendRendered");
        }
    }
};