AreaChart.java

/**
 * Copyright (C) 2009, 2010 SC 4ViewSoft SRL
 *  
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *  
 *      http://www.apache.org/licenses/LICENSE-2.0
 *  
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.achartengine.chartdemo.demo.chart;

import static org.achartengine.chartdemo.demo.chart.ChartConstants.COLOURS;
import static org.achartengine.chartdemo.demo.chart.ChartConstants.STYLEZ;

import java.util.ArrayList;
import java.util.List;

import jm.org.data.area.AreaApplication;
import jm.org.data.area.R;

import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;

import android.content.Context;
import android.graphics.Color;
import android.graphics.Paint.Align;
import android.util.Log;

/**
 * Average temperature demo chart.
 */
public class AreaChart extends AbstractDemoChart {
	/**
	 * Returns the chart name.
	 * 
	 * @return the chart name
	 */
	public String getName() {
		return "Average temperature";
	}

	/**
	 * Returns the chart description.
	 * 
	 * @return the chart description
	 */
	public String getDesc() {
		return "The average temperature in 4 Greek islands (line chart)";
	}

	/**
	 * Executes the chart demo.
	 * 
	 * @param context
	 *            the context
	 * @return the built intent
	 */
	
	protected AreaApplication area;
	
	public GraphicalView execute(Context context, String indicator,
			String[] countries) {
		//AreaData dataService = new AreaData(context);
		area =  (AreaApplication) context.getApplicationContext();
		// dataService.genericSearch(WORLD_SEARCH, "AG.LND.AGRI.ZS", new
		// String[]{"Jamaica", "Kenya","Barbados"});
		double[][] data;
		int ind_id, y_max = 0, pos1, pos2;
		String indicator_name, x_axis;
		boolean createChart = false;

		ind_id = area.areaData.getIndicatorID(indicator);
		indicator_name = area.areaData.getIndicatorName(indicator);
		Log.e("Charts", "Indicator: " + indicator_name + "num of countries: "
				+ countries.length);
		pos1 = indicator_name.indexOf("(");
		pos2 = indicator_name.indexOf(")");

		if (pos1 >= 0) {
			pos1++;
		} else {
			pos1 = indicator_name.indexOf(",");
			pos1++;
			pos2 = indicator_name.length() - 1;
		}

		x_axis = indicator_name.substring(pos1, pos2);

		// String[] titles = new String[] { "Jamaica", "Barbadoes" };
		List<double[]> x = new ArrayList<double[]>();
		List<double[]> values = new ArrayList<double[]>();
		int[] colors = new int[countries.length];
		PointStyle[] styles = new PointStyle[countries.length];
		String test = "", test1 = "";

		for (int i = 0; i < countries.length; i++) {
			data = area.areaData.getIndicatorList(ind_id, countries[i], 1);
			if (data.length != 0) {
				Log.e("Charts", "data length" + data[0].length);
				test = "";
				test1 = "";
				for (int a = 0; a < data[0].length; a++) {
					test = test + ", " + data[0][a];
					test1 = test1 + ", " + data[1][a];
				}
				Log.e("Charts", "data dates - " + test);
				Log.e("Charts", "data values- " + test1);
				x.add(data[0]);
				values.add(data[1]);
				y_max = getMax(data[1], y_max);
				Log.e("Charts", "Max " + y_max);
				colors[i] = COLOURS[i];
				styles[i] = STYLEZ[0];
				createChart = true;
			} else {
				createChart = false;
				Log.e("Charts", "No Data retrieved");
			}
		}
		if (createChart) {
			if (y_max == 0) {
				y_max = 1;
			} else {
				y_max = y_max * 2;
			}

			XYMultipleSeriesRenderer renderer = buildRenderer(colors, styles);
			int length = renderer.getSeriesRendererCount();
			for (int i = 0; i < length; i++) {
				((XYSeriesRenderer) renderer.getSeriesRendererAt(i))
						.setFillPoints(true);
			}

			setChartSettings(renderer, indicator_name, "Year", x_axis, 1990,
					2012, 0, y_max, Color.BLACK, Color.BLACK);
			renderer.setXLabels(13);
			renderer.setYLabels(10);
			renderer.setShowGrid(true);
			renderer.setXLabelsAlign(Align.RIGHT);
			renderer.setYLabelsAlign(Align.LEFT);
			renderer.setChartTitleTextSize(16);
			//renderer.setBackgroundColor(Color.parseColor("#C0D4B5"));
			renderer.setApplyBackgroundColor(true);
			renderer.setZoomButtonsVisible(true);
			renderer.setPanLimits(new double[] { 1980, 2016, -1 * y_max,
					y_max * 2 });
			renderer.setZoomLimits(new double[] { 1980, 2016, -1 * y_max,
					y_max * 2 });
			renderer.setBackgroundColor(Color.GRAY);
			renderer.setMarginsColor(Color.parseColor("#FAFBF5"));
			GraphicalView intent = ChartFactory.getLineChartView(context,
					buildDataset(countries, x, values), renderer);

			return intent;
		} else {
			return null;
		}
	}

	private int getMax(double[] array, int y_max) {
		double max = y_max;

		for (int n = 0; n < array.length; n++) {
			if (max <= array[n]) {
				max = array[n];
			}
		}

		return (int) max;
	}
}