public PreviewColumnChartView(Context context, AttributeSet attrs, int defStyle) { super(context, attrs, defStyle); chartComputator = new PreviewChartComputator(); previewChartRenderer = new PreviewColumnChartRenderer(context, this, this); touchHandler = new PreviewChartTouchHandler(context, this); setChartRenderer(previewChartRenderer); setColumnChartData(ColumnChartData.generateDummyData()); }