com.zavtech.morpheus.viz.google.GChart Maven / Gradle / Ivy
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/**
* Copyright (C) 2014-2017 Xavier Witdouck
*
* 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 com.zavtech.morpheus.viz.google;
import java.awt.*;
import java.io.File;
import java.io.OutputStream;
import java.time.LocalDate;
import java.util.UUID;
import java.util.stream.Stream;
import com.zavtech.morpheus.array.Array;
import com.zavtech.morpheus.frame.DataFrame;
import com.zavtech.morpheus.range.Range;
import com.zavtech.morpheus.viz.chart.Chart;
import com.zavtech.morpheus.viz.chart.ChartLabel;
import com.zavtech.morpheus.viz.chart.ChartLegend;
import com.zavtech.morpheus.viz.chart.ChartOptions;
import com.zavtech.morpheus.viz.chart.ChartTheme;
import com.zavtech.morpheus.viz.chart.pie.PiePlot;
import com.zavtech.morpheus.viz.html.HtmlCode;
import com.zavtech.morpheus.viz.js.JsCode;
/**
* A Chart implementation that uses the Google Charting library to render charts in a browser
*
* @param the plot type for this chart
*
* @author Xavier Witdouck
*
*
This is open source software released under the Apache 2.0 License
*/
class GChart implements Chart
{
private P plot;
private ChartOptions options = new ChartOptions.Default();
private LegendAdapter legend = new LegendAdapter();
private GChartLabel title = new GChartLabel(Color.BLACK, new Font("Arial", Font.BOLD, 16));
private GChartLabel subtitle = new GChartLabel(Color.BLACK, new Font("Arial", Font.BOLD, 14));
/**
* Constructor
* @param plot the plot for this chart
*/
GChart(P plot) {
this.plot = plot;
}
@Override
public P plot() {
return plot;
}
@Override
public ChartLabel title() {
return title;
}
@Override
public ChartLabel subtitle() {
return subtitle;
}
@Override
public ChartTheme theme() {
return null;
}
@Override
public ChartOptions options() {
return options;
}
@Override
public ChartLegend legend() {
return legend;
}
@Override
public Chart show() {
return show(1024, 768);
}
@SuppressWarnings("unchecked")
public Chart show(int width, int height) {
try {
final String divName = "chart1";
final String functionName = "drawChart1";
final HtmlCode writer = new HtmlCode();
writer.newElement("html", html -> {
html.newElement("head", head -> {
head.newElement("script", script -> {
script.newAttribute("type", "text/javascript");
script.newAttribute("src", "https://www.gstatic.com/charts/loader.js");
});
head.newElement("script", script -> {
script.newAttribute("type", "text/javascript");
script.text(JsCode.create(js -> {
js.newLine().write("google.charts.load('current', {'packages':['corechart']});");
js.newLine().write("google.charts.setOnLoadCallback(%s);", functionName);
this.accept(js, functionName, divName);
}));
});
});
html.newElement("body", body -> {
body.newElement("div", div -> {
div.newAttribute("id", divName);
div.newAttribute("style", "width:100%;height:100%;");
});
});
});
final File dir = new File(System.getProperty("user.home"), ".morpheus/charts");
final File file = new File(dir, UUID.randomUUID().toString() + ".html");
if (file.getParentFile().mkdirs()) System.out.println("Created directory: " + dir.getAbsolutePath());
System.out.println(writer.toString());
writer.flush(file);
Desktop.getDesktop().browse(file.toURI());
return this;
} catch (Exception ex) {
throw new RuntimeException("Failed to generate Google chart", ex);
}
}
@Override
public Chart writerPng(File file, int width, int height, boolean transparent) {
//throw new UnsupportedOperationException("Google Charts cannot be rendered as a PNG, call Chart.create().javascript() and embed in an HTML page");
return this;
}
@Override
public Chart writerPng(OutputStream os, int width, int height, boolean transparent) {
//throw new UnsupportedOperationException("Google Charts cannot be rendered as a PNG, call Chart.create().javascript() and embed in an HTML page");
return this;
}
@Override
public void accept(JsCode jsCode, String functionName, String divId) {
jsCode.write("/** This is code generation by the Morpheus Visualization library */");
jsCode.newFunction(functionName, func -> {
if (plot() instanceof GXyPlot) {
final GXyModel model = (GXyModel)((GXyPlot)plot).data();
final GXyDataset dataset = model.getUnifiedDataset();
func.write("var data = google.visualization.arrayToDataTable(");
dataset.accept(func);
func.write(");");
} else if (plot instanceof GPiePlot) {
final GPiePlot plot = (GPiePlot)plot();
final GPieModel model = (GPieModel)plot.data();
func.write("var data = google.visualization.arrayToDataTable(");
model.accept(func);
func.write(");");
}
func.newLine(2);
func.write("var options = ");
func.newObject(options -> {
options.setIgnoreNulls(true);
options.newAttribute("fontSize", "automatic");
options.newAttribute("fontName", "Arial");
options.newAttribute("title", createTitle());
options.newAttribute("titlePosition", "out");
options.newObject("titleTextStyle", title);
options.newObject("backgroundColor", background -> {
//background.newAttribute("stroke", "");
background.newAttribute("strokeWidth", 0);
//background.newAttribute("fill", "");
});
options.newObject("chartArea", area -> {
area.newAttribute("left", "auto");
area.newAttribute("top", "auto");
area.newAttribute("width", "80%");
area.newAttribute("height", "auto");
});
if (legend.enabled) {
options.newObject("legend", legend -> {
legend.newAttribute("position", this.legend.position);
legend.newAttribute("alignment", this.legend.alignment);
legend.newObject("textStyle", this.legend.style);
});
}
if (plot instanceof GXyPlot) {
((GXyPlot)plot).accept(options);
options.newObject("explorer", explorer -> {
explorer.newAttribute("keepInBounds", true);
explorer.newArray("actions", true, a -> {
a.append("dragToZoom");
a.append("rightClickToReset");
});
});
} else if (plot instanceof GPiePlot) {
((GPiePlot)plot).accept(options);
}
});
func.write(";");
func.newLine();
func.newLine().write("var target = document.getElementById('%s');", divId);
func.newLine().write("var chart = new google.visualization.%s(target);", getChartType());
func.newLine().write("chart.draw(data, options);");
});
}
/**
* Returns the title / subtitle combo
* @return the title / subtitle combo
*/
private String createTitle() {
final StringBuilder result = new StringBuilder();
if (title.getText() != null) result.append(title.getText());
if (subtitle.getText() != null) {
final boolean brackets = result.length() > 0;
result.append(brackets ? " - (" : "");
result.append(subtitle.getText());
result.append(brackets ? ")" : "");
}
return result.toString();
}
/**
* Returns the Google chart type Javascript class
* @return the Google chart type
*/
private String getChartType() {
if (plot instanceof PiePlot) {
return "PieChart";
} else if (plot instanceof GXyPlot) {
final GXyPlot gxyPlot = (GXyPlot)plot;
final GXyRender render = (GXyRender)gxyPlot.render(0);
final boolean vertical = gxyPlot.isVertical();
switch (render.getChartType()) {
case LINES: return "LineChart";
case BARS: return vertical ? "ColumnChart" : "BarChart";
case AREA: return "AreaChart";
case SHAPES: return "ScatterChart";
case DOTS: return "ScatterChart";
default: throw new IllegalStateException("Unsupported chart type: " + render.getChartType());
}
} else {
throw new IllegalArgumentException("Unsupported plot type specified: " + plot.getClass());
}
}
/**
* A ChartLegend adapter for Google charts
*/
private class LegendAdapter implements ChartLegend {
private boolean enabled = false;
private String position = "right";
private String alignment = "start";
private GChartTextStyle style = new GChartTextStyle(Color.BLACK, new Font("Arial", Font.PLAIN, 10));
@Override
public ChartLegend on() {
this.enabled = true;
return this;
}
@Override
public ChartLegend off() {
this.enabled = false;
return this;
}
@Override
public ChartLegend right() {
this.position = "right";
return this;
}
@Override
public ChartLegend left() {
this.position = "left";
return this;
}
@Override
public ChartLegend top() {
this.position = "top";
return this;
}
@Override
public ChartLegend bottom() {
this.position = "bottom";
return this;
}
}
public static void main(String[] args) {
int rowCount = 1000;
LocalDate startDate = LocalDate.of(2013, 1, 1);
Range rowKeys = Range.of(0, rowCount);
Range dates = rowKeys.map(startDate::plusDays);
DataFrame frame = DataFrame.of(rowKeys, String.class, columns -> {
columns.add("DataDate", dates);
Stream.of("A", "B", "C", "D").forEach(label -> {
columns.add(label, Array.randn(rowCount).cumSum());
});
});
frame.out().print();
Chart.create().asHtml().withLinePlot(frame, "DataDate", chart -> {
chart.legend().on().right();
chart.title().withText("Test Chart");
chart.title().withColor(Color.BLACK);
chart.plot().axes().domain().label().withText("Cities");
chart.plot().axes().range(0).label().withText("Population");
chart.show();
});
}
}