public onCursorDrag()

in src/timeLine.ts [1053:1083]
23 lines of code
6 McCabe index (conditional complexity)

    public onCursorDrag(currentCursor: ICursorDataPoint): void {
        const cursorOverElement: ITimelineCursorOverElement = this.findCursorOverElement((<MouseEvent>(require("d3").event)).x);

        if (!cursorOverElement) {
            return;
        }

        const currentlyMouseOverElement: ITimelineDataPoint = cursorOverElement.datapoint;
        const currentlyMouseOverElementIndex: number = cursorOverElement.index;

        if (currentCursor.cursorIndex === 0 && currentlyMouseOverElementIndex <= this.timelineData.selectionEndIndex) {
            this.timelineData.selectionStartIndex = currentlyMouseOverElementIndex;
            this.timelineData.cursorDataPoints[0].selectionIndex = currentlyMouseOverElement.datePeriod.index;
        }

        if (currentCursor.cursorIndex === 1 && currentlyMouseOverElementIndex >= this.timelineData.selectionStartIndex) {
            this.timelineData.selectionEndIndex = currentlyMouseOverElementIndex;

            this.timelineData.cursorDataPoints[1].selectionIndex =
                currentlyMouseOverElement.datePeriod.index + currentlyMouseOverElement.datePeriod.fraction;
        }

        this.fillCells(this.settings);

        this.renderCursors(
            this.timelineData,
            this.timelineProperties.cellHeight,
            this.timelineProperties.cellsYPosition);

        this.renderTimeRangeText(this.timelineData, this.settings.rangeHeader);
    }