AbstractChart.java

package be.lukin.android.babble;

import java.util.Date;
import java.util.List;

import org.achartengine.chart.PointStyle;
import org.achartengine.model.CategorySeries;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.model.XYSeries;
import org.achartengine.renderer.SimpleSeriesRenderer;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import android.graphics.Color;

public abstract class AbstractChart {

	/**
	 * Builds an XY multiple dataset using the provided values.
	 * 
	 * @param titles the series titles
	 * @param xValues the values for the X axis
	 * @param yValues the values for the Y axis
	 * @return the XY multiple dataset
	 */
	protected XYMultipleSeriesDataset buildDataset(String[] titles, List<double[]> xValues,
			List<double[]> yValues) {
		XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
		addXYSeries(dataset, titles, xValues, yValues, 0);
		return dataset;
	}

	public void addXYSeries(XYMultipleSeriesDataset dataset, String[] titles, List<double[]> xValues,
			List<double[]> yValues, int scale) {
		int length = titles.length;
		for (int i = 0; i < length; i++) {
			XYSeries series = new XYSeries(titles[i], scale);
			double[] xV = xValues.get(i);
			double[] yV = yValues.get(i);
			int seriesLength = xV.length;
			for (int k = 0; k < seriesLength; k++) {
				series.add(xV[k], yV[k]);
			}
			dataset.addSeries(series);
		}
	}

	/**
	 * Builds an XY multiple series renderer.
	 * 
	 * @param colors the series rendering colors
	 * @param styles the series point styles
	 * @return the XY multiple series renderers
	 */
	protected XYMultipleSeriesRenderer buildRenderer(int[] colors, PointStyle[] styles) {
		XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
		setRenderer(renderer, colors, styles);
		return renderer;
	}

	protected void setRenderer(XYMultipleSeriesRenderer renderer, int[] colors, PointStyle[] styles) {
		renderer.setAxisTitleTextSize(16);
		renderer.setChartTitleTextSize(20);
		renderer.setLabelsTextSize(15);
		renderer.setLegendTextSize(15);
		renderer.setPointSize(5f);
		renderer.setMargins(new int[] { 20, 30, 15, 20 });
		int length = colors.length;
		for (int i = 0; i < length; i++) {
			XYSeriesRenderer r = new XYSeriesRenderer();
			r.setColor(colors[i]);
			r.setPointStyle(styles[i]);
			renderer.addSeriesRenderer(r);
		}
	}

	/**
	 * Sets a few of the series renderer settings.
	 * 
	 * @param renderer the renderer to set the properties to
	 * @param title the chart title
	 * @param xTitle the title for the X axis
	 * @param yTitle the title for the Y axis
	 * @param xMin the minimum value on the X axis
	 * @param xMax the maximum value on the X axis
	 * @param yMin the minimum value on the Y axis
	 * @param yMax the maximum value on the Y axis
	 * @param axesColor the axes color
	 * @param labelsColor the labels color
	 */
	protected void setChartSettings(XYMultipleSeriesRenderer renderer, String title, String xTitle,
			String yTitle, double xMin, double xMax, double yMin, double yMax, int axesColor,
			int labelsColor) {
		//renderer.setChartTitle(title);
		//renderer.setXTitle(xTitle);
		//renderer.setYTitle(yTitle);
		renderer.setXAxisMin(xMin);
		renderer.setXAxisMax(xMax);
		renderer.setYAxisMin(yMin);
		renderer.setYAxisMax(yMax);
		renderer.setAxesColor(axesColor);
		renderer.setLabelsColor(labelsColor);
	}

	/**
	 * Builds an XY multiple time dataset using the provided values.
	 * 
	 * @param titles the series titles
	 * @param xValues the values for the X axis
	 * @param yValues the values for the Y axis
	 * @return the XY multiple time dataset
	 */
	protected XYMultipleSeriesDataset buildDateDataset(String[] titles, List<Date[]> xValues,
			List<double[]> yValues) {
		XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
		int length = titles.length;
		for (int i = 0; i < length; i++) {
			TimeSeries series = new TimeSeries(titles[i]);
			Date[] xV = xValues.get(i);
			double[] yV = yValues.get(i);
			int seriesLength = xV.length;
			for (int k = 0; k < seriesLength; k++) {
				series.add(xV[k], yV[k]);
			}
			dataset.addSeries(series);
		}
		return dataset;
	}

	/**
	 * Builds a category series using the provided values.
	 * 
	 * @param titles the series titles
	 * @param values the values
	 * @return the category series
	 */
	/*
	protected CategorySeries buildCategoryDataset(String title, double[] values) {
		CategorySeries series = new CategorySeries(title);
		int k = 0;
		for (double value : values) {
			series.add("Project " + ++k, value);
		}

		return series;
	}
	 */

	/**
	 * Builds a multiple category series using the provided values.
	 * 
	 * @param titles the series titles
	 * @param values the values
	 * @return the category series
	 */
	/*
	protected MultipleCategorySeries buildMultipleCategoryDataset(String title,
			List<String[]> titles, List<double[]> values) {
		MultipleCategorySeries series = new MultipleCategorySeries(title);
		int k = 0;
		for (double[] value : values) {
			series.add(2007 + k + "", titles.get(k), value);
			k++;
		}
		return series;
	}
	 */

	/**
	 * Builds a category renderer to use the provided colors.
	 * 
	 * @param colors the colors
	 * @return the category renderer
	 */
	/*
	protected DefaultRenderer buildCategoryRenderer(int[] colors) {
		DefaultRenderer renderer = new DefaultRenderer();
		renderer.setLabelsTextSize(15);
		renderer.setLegendTextSize(15);
		renderer.setMargins(new int[] { 20, 30, 15, 0 });
		for (int color : colors) {
			SimpleSeriesRenderer r = new SimpleSeriesRenderer();
			r.setColor(color);
			renderer.addSeriesRenderer(r);
		}
		return renderer;
	}
	 */

	/**
	 * Builds a bar multiple series dataset using the provided values.
	 * 
	 * @param titles the series titles
	 * @param values the values
	 * @return the XY multiple bar dataset
	 */
	protected XYMultipleSeriesDataset buildBarDataset(String[] titles, List<double[]> values) {
		XYMultipleSeriesDataset dataset = new XYMultipleSeriesDataset();
		int length = titles.length;
		for (int i = 0; i < length; i++) {
			CategorySeries series = new CategorySeries(titles[i]);
			double[] v = values.get(i);
			int seriesLength = v.length;
			for (int k = 0; k < seriesLength; k++) {
				series.add(v[k]);
			}
			dataset.addSeries(series.toXYSeries());
		}
		return dataset;
	}

	/**
	 * Builds a bar multiple series renderer to use the provided colors.
	 * 
	 * @param colors the series renderers colors
	 * @return the bar multiple series renderer
	 */
	protected XYMultipleSeriesRenderer buildBarRenderer(int[] colors) {
		XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
		renderer.setAxisTitleTextSize(16);
		renderer.setChartTitleTextSize(20);
		renderer.setLabelsTextSize(20);
		renderer.setLegendTextSize(15);
		renderer.setInScroll(false);
		renderer.setBackgroundColor(Color.WHITE);
		renderer.setExternalZoomEnabled(false);
		int length = colors.length;
		for (int i = 0; i < length; i++) {
			SimpleSeriesRenderer r = new SimpleSeriesRenderer();
			r.setColor(colors[i]);
			renderer.addSeriesRenderer(r);
		}
		return renderer;
	}

}