protected void resetRendererAndTouchHandler() {
        this.chartRenderer.resetRenderer();
        this.axesRenderer.resetRenderer();
        this.touchHandler.resetTouchHandler();
    }
You should call this method in derived classes, most likely from constructor if you changed chart/axis renderer,
touch handler or chart computator
hellocharts-library/src/lecho/lib/hellocharts/view/AbstractChartView.java