!7

lib 1001955 // charts4j

import com.googlecode.charts4j.*;
import static com.googlecode.charts4j.Color.*;
import static com.googlecode.charts4j.Shape.*;
import static com.googlecode.charts4j.UrlUtil.normalize;
import java.awt.Color;
import java.awt.Shape;

answer {
  if (jmatchStart("chart", s, m)) exceptionToUser {
    S title = s;
    int width = 300, height = 220;
    
    // Make values
    
    s = m.rest();
    print("Chart: rest = " + quote(s));
    
    if (jmatchStart("*", s, m) && isQuoted(m.get(0))) {
      title = unquote(m.get(0));
      s = m.rest();
      print("Chart: rest2 = " + quote(s));
    }

    Double base = null;
    if (jmatchStart("base *", s, m)) {
      base = parseDouble(m.unq(0));
      s = m.rest();
    }
    
    L<S> tok = asList(s.split(" +"));
    if (!empty(tok)) {
      final int NUM_POINTS = l(tok);
      final double[] values = new double[NUM_POINTS];
      for (int i = 0; i < NUM_POINTS; i++)
        values[i] = parseDouble(tok.get(i));
      print("Chart values: " + structure(values));
      double minValue = base != null ? base : min(values), maxValue = max(values);
      print("Chart: min/max=" + minValue + "/" + maxValue);
        
      Line line1 = Plots.newLine(DataUtil.scaleWithinRange(minValue, maxValue, values), com.googlecode.charts4j.Color.newColor("CA3D05"), ""/*valuesTitle*/);
      
      line1.setLineStyle(LineStyle.newLineStyle(3, 1, 0));
      line1.addShapeMarkers(DIAMOND, newColor("CA3D05"), 12);
      line1.addShapeMarkers(DIAMOND, WHITE, 8);
      
      // Defining chart.
      
      LineChart chart = GCharts.newLineChart(line1);
      chart.setSize(width, height);
      chart.setTitle(title, BLACK, 14);
      //chart.setGrid(25, 25, 3, 2);
    
      // Adding axis info to chart.
      
      // Let's try this... works with positive values
      chart.addYAxisLabels(AxisLabelsFactory.newNumericRangeAxisLabels(minValue, maxValue));

    
      // Defining background and chart fills.
      
      /*
      chart.setBackgroundFill(Fills.newSolidFill(newColor("1F1D1D")));
      LinearGradientFill fill = Fills.newLinearGradientFill(0, newColor("363433"), 100);
      fill.addColorAndOffset(newColor("2E2B2A"), 0);
      chart.setAreaFill(fill);
      */
      
      ret returnImage(chart.toURLString());
    }
  }
}

Began life as a copy of #1002471