Function getSymbolMeta

src/chart/bar/PictorialBarView.ts:252–302

(
    data: SeriesData,
    dataIndex: number,
    itemModel: ItemModel,
    opt: CreateOpts
)

// Set or calculate default value about symbol, and calculate layout info.
function getSymbolMeta(
    data: SeriesData,
    dataIndex: number,
    itemModel: ItemModel,
    opt: CreateOpts
): SymbolMeta {
    const layout = data.getItemLayout(dataIndex) as RectLayout;
    const symbolRepeat = itemModel.get('symbolRepeat');
    const symbolClip = itemModel.get('symbolClip');
    const symbolPosition = itemModel.get('symbolPosition') || 'start';
    const symbolRotate = itemModel.get('symbolRotate');
    const rotation = (symbolRotate || 0) * Math.PI / 180 || 0;
    const symbolPatternSize = itemModel.get('symbolPatternSize') || 2;
    const isAnimationEnabled = itemModel.isAnimationEnabled();

    const symbolMeta: SymbolMeta = {
        dataIndex: dataIndex,
        layout: layout,
        itemModel: itemModel,
        symbolType: data.getItemVisual(dataIndex, 'symbol') || 'circle',
        style: data.getItemVisual(dataIndex, 'style'),
        symbolClip: symbolClip,
        symbolRepeat: symbolRepeat,
        symbolRepeatDirection: itemModel.get('symbolRepeatDirection'),
        symbolPatternSize: symbolPatternSize,
        rotation: rotation,
        animationModel: isAnimationEnabled ? itemModel : null,
        hoverScale: isAnimationEnabled && itemModel.get(['emphasis', 'scale']),
        z2: itemModel.getShallow('z', true) || 0
    } as SymbolMeta;

    prepareBarLength(itemModel, symbolRepeat, layout, opt, symbolMeta);

    prepareSymbolSize(
        data, dataIndex, layout, symbolRepeat, symbolClip, symbolMeta.boundingLength,
        symbolMeta.pxSign, symbolPatternSize, opt, symbolMeta
    );

    prepareLineWidth(itemModel, symbolMeta.symbolScale, rotation, opt, symbolMeta);

    const symbolSize = symbolMeta.symbolSize;
    const symbolOffset = normalizeSymbolOffset(itemModel.get('symbolOffset'), symbolSize);

    prepareLayoutInfo(
        itemModel, symbolSize, layout, symbolRepeat, symbolClip, symbolOffset as number[],
        symbolPosition, symbolMeta.valueLineWidth, symbolMeta.boundingLength, symbolMeta.repeatCutLength,
        opt, symbolMeta
    );

    return symbolMeta;
}

// bar length can be negative.
function prepareBarLength(