android - Graph visible outside X and Y axis

Question

I am using achartengine for data that my application is continuously receiving over a socket connection. The point are plotted against time which is my x axis. Once the graph is in place a user can pan and zoom on the graph. Everything is buttery smooth. The only problem is that when the user zooms the graph, portions of the graph is also visible on the other side of x and y axis.

How do i restrict the graph from being visible outside the X and Y axis?

Here is a portion of my code.

XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();

renderer.setChartTitleTextSize(12);
renderer.setLabelsTextSize(15);
renderer.setMarginsColor(Color.argb(0x00, 0x01, 0x01, 0x01));
renderer.setApplyBackgroundColor(true);
renderer.setBackgroundColor(Color.TRANSPARENT);
renderer.setZoomEnabled(true, true);
    renderer.setPointSize(5f);
renderer.setShowGrid(true);
renderer.setXTitle(xTitle);
renderer.setYTitle(yTitle);
renderer.setLabelsColor(getResources().getColor(R.color.black));
renderer.setXLabelsColor(getResources().getColor(R.color.black));
renderer.setYLabelsColor(0, getResources().getColor(R.color.black));
renderer.setDisplayValues(true);
renderer.setSelectableBuffer(20);
renderer.setShowLegend(false);

    renderer.setRange(new double[] { timeSeriesChart.getMinX(),
            timeSeriesChart.getMaxX(), 0/* minY */, maxY });

    renderer.setPanLimits(getChartLimit(
     isTimeChart, timeSeriesChart.getMinX(), timeSeriesChart.getMaxX(),
     (maxY*-1)+timeSeriesChart.getMinY(),
     maxY));