org.projecthdata.weight.ui.ChartFragment.java Source code

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Here is the source code for org.projecthdata.weight.ui.ChartFragment.java

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/*
 * Copyright 2011 The MITRE Corporation
 *
 * 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.projecthdata.weight.ui;

import java.sql.SQLException;

import org.achartengine.ChartFactory;
import org.achartengine.GraphicalView;
import org.achartengine.chart.PointStyle;
import org.achartengine.model.TimeSeries;
import org.achartengine.model.XYMultipleSeriesDataset;
import org.achartengine.renderer.XYMultipleSeriesRenderer;
import org.achartengine.renderer.XYSeriesRenderer;
import org.projecthdata.weight.OrmProvider;
import org.projecthdata.weight.R;
import org.projecthdata.weight.database.WeightDatabaseHelper;
import org.projecthdata.weight.model.WeightReading;

import android.graphics.Color;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.view.ViewGroup.LayoutParams;

public class ChartFragment extends Fragment {
    WeightDatabaseHelper databaseHelper = null;
    private GraphicalView chartView = null;
    private XYMultipleSeriesDataset dataSet = null;
    private TimeSeries series = null;
    private ViewGroup chartContainer = null;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        return inflater.inflate(R.layout.chart, container, false);
    }

    @Override
    public void onActivityCreated(Bundle savedInstanceState) {
        super.onActivityCreated(savedInstanceState);
        databaseHelper = ((OrmProvider) getActivity()).getDatabaseHelper();
        series = new TimeSeries("Weight Readings");
        this.dataSet = new XYMultipleSeriesDataset();
        this.dataSet.addSeries(this.series);

        addNewChartViewToContainer();

    }

    private void addNewChartViewToContainer() {
        chartView = ChartFactory.getTimeChartView(getActivity(), dataSet, getRenderer(), "MM/dd/yyyy");

        chartContainer = (ViewGroup) getActivity().findViewById(R.id.weight_chart_container);

        chartContainer.addView(chartView, new LayoutParams(LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT));
    }

    public void repaintChart() {
        chartView.repaint();

    }

    public void refreshChart() {
        series.clear();
        try {
            for (WeightReading reading : databaseHelper.getWeightDao()) {
                series.add(reading.getDateTime(), reading.getResultValue());
            }
            chartContainer.removeView(chartView);

            addNewChartViewToContainer();

        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void onResume() {
        super.onResume();

        refreshChart();

    }

    private XYMultipleSeriesRenderer getRenderer() {
        XYMultipleSeriesRenderer renderer = new XYMultipleSeriesRenderer();
        renderer.setAxisTitleTextSize(16);
        renderer.setChartTitleTextSize(16);
        renderer.setLabelsTextSize(14);
        renderer.setPointSize(5f);
        renderer.setMargins(new int[] { 10, 10, 0, 10 });

        renderer.setAxesColor(Color.DKGRAY);
        renderer.setLabelsColor(Color.LTGRAY);
        renderer.setBackgroundColor(Color.BLACK);
        renderer.setApplyBackgroundColor(true);
        renderer.setShowLegend(false);
        renderer.setAntialiasing(true);
        renderer.setShowGrid(true);
        renderer.setYAxisMin(0.0);

        XYSeriesRenderer r = new XYSeriesRenderer();
        r.setColor(Color.BLUE);
        r.setPointStyle(PointStyle.SQUARE);
        r.setFillPoints(true);
        renderer.addSeriesRenderer(r);

        return renderer;
    }

}