Method _createIndicator

src/component/visualMap/ContinuousView.ts:328–386

(
        visualMapModel: ContinuousModel,
        mainGroup: graphic.Group,
        itemSize: number[],
        textSize: number,
        orient: Orient
    )

    }

    private _createIndicator(
        visualMapModel: ContinuousModel,
        mainGroup: graphic.Group,
        itemSize: number[],
        textSize: number,
        orient: Orient
    ) {
        const scale = parsePercent(visualMapModel.get('indicatorSize'), itemSize[0]);
        const indicator = createSymbol(
            visualMapModel.get('indicatorIcon'),
            -scale / 2, -scale / 2, scale, scale,
            null, true
        );
        indicator.attr({
            cursor: 'move',
            invisible: true,
            silent: true,
            x: itemSize[0] / 2
        });
        const indicatorStyle = visualMapModel.getModel('indicatorStyle').getItemStyle();
        if (indicator instanceof ZRImage) {
            const pathStyle = indicator.style;
            indicator.useStyle(zrUtil.extend({
                // TODO other properties like x, y ?
                image: pathStyle.image,
                x: pathStyle.x, y: pathStyle.y,
                width: pathStyle.width, height: pathStyle.height
            }, indicatorStyle));
        }
        else {
            indicator.useStyle(indicatorStyle);
        }

        mainGroup.add(indicator);

        const textStyleModel = this.visualMapModel.textStyleModel;
        const indicatorLabel = new graphic.Text({
            silent: true,
            invisible: true,
            style: createTextStyle(textStyleModel, {
                x: 0,
                y: 0,
                text: ''
            })
        });
        this.group.add(indicatorLabel);

        const indicatorLabelPoint = [
            (orient === 'horizontal' ? textSize / 2 : HOVER_LINK_OUT) + itemSize[0] / 2,
            0
        ];

        const shapes = this._shapes;
        shapes.indicator = indicator;
        shapes.indicatorLabel = indicatorLabel;
        shapes.indicatorLabelPoint = indicatorLabelPoint;

        this._firstShowIndicator = true;