Android Open Source - customhellochartdemo Line Chart Data

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Back to project page customhellochartdemo.

License

The source code is released under:

Apache License

Java Source Code

package lecho.lib.hellocharts.model;
/*  w ww . j av  a 2s.  c o m*/
import java.util.ArrayList;
import java.util.List;

/**
 * Data model for LineChartView.
 * 
 */
public class LineChartData extends AbstractChartData {
  public static final float DEFAULT_BASE_VALUE = 0.0f;

  private List<Line> lines = new ArrayList<Line>();
  private float baseValue = DEFAULT_BASE_VALUE;

  public LineChartData() {

  }

  public LineChartData(List<Line> lines) {
    setLines(lines);
  }

  /**
   * Copy constructor to perform deep copy of chart data.
   */
  public LineChartData(LineChartData data) {
    super(data);
    this.baseValue = data.baseValue;

    for (Line line : data.lines) {
      this.lines.add(new Line(line));
    }
  }

  @Override
  public void update(float scale) {
    for (Line line : lines) {
      line.update(scale);
    }
  }

  @Override
  public void finish() {
    for (Line line : lines) {
      line.finish();
    }
  }

  public List<Line> getLines() {
    return lines;
  }

  public LineChartData setLines(List<Line> lines) {
    if (null == lines) {
      this.lines = new ArrayList<Line>();
    } else {
      this.lines = lines;
    }
    return this;
  }

  /**
   * @see #setBaseValue(float)
   */
  public float getBaseValue() {
    return baseValue;
  }

  /**
   * Set value below which values will be drawn as negative, important attribute for drawing filled area charts, by
   * default 0.
   */
  public LineChartData setBaseValue(float baseValue) {
    this.baseValue = baseValue;
    return this;
  }

  public static LineChartData generateDummyData() {
    final int numValues = 4;
    LineChartData data = new LineChartData();
    List<PointValue> values = new ArrayList<PointValue>(numValues);
    values.add(new PointValue(0, 2));
    values.add(new PointValue(1, 4));
    values.add(new PointValue(2, 3));
    values.add(new PointValue(3, 4));
    Line line = new Line(values);
    List<Line> lines = new ArrayList<Line>(1);
    lines.add(line);
    data.setLines(lines);
    return data;
  }
}

Java Source Code List

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