Method createDragHandler

src/label/LabelManager.ts:334–338

(el: Element, labelLineModel: Model)

        const height = api.getHeight();

        function createDragHandler(el: Element, labelLineModel: Model) {
            return function () {
                updateLabelLinePoints(el, labelLineModel);
            };
        }
        for (let i = 0; i < this._labelList.length; i++) {
            const labelItem = this._labelList[i];
            const label = labelItem.label;