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/*
* Copyright 2011 gitblit.com.
*
* 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.gitblit.wicket.charting;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import com.gitblit.utils.StringUtils;
/**
* Builds an interactive pie chart using the Visualization API.
*
* @author James Moger
*
*/
public class GooglePieChart extends GoogleChart {
private static final long serialVersionUID = 1L;
public GooglePieChart(String tagId, String title, String keyName, String valueName) {
super(tagId, title, keyName, valueName);
}
@Override
protected void appendChart(StringBuilder sb) {
// create dataset
String dName = "data_" + dataName;
line(sb, MessageFormat.format("var {0} = new google.visualization.DataTable();", dName));
line(sb, MessageFormat.format("{0}.addColumn(''string'', ''{1}'');", dName, keyName));
line(sb, MessageFormat.format("{0}.addColumn(''number'', ''{1}'');", dName, valueName));
line(sb, MessageFormat.format("{0}.addRows({1,number,0});", dName, values.size()));
Collections.sort(values);
List<ChartValue> list = new ArrayList<ChartValue>();
int maxSlices = 10;
if (values.size() > maxSlices) {
list.addAll(values.subList(0, maxSlices));
} else {
list.addAll(values);
}
StringBuilder colors = new StringBuilder("colors:[");
for (int i = 0; i < list.size(); i++) {
ChartValue value = list.get(i);
colors.append('\'');
colors.append(StringUtils.getColor(value.name));
colors.append('\'');
if (i < values.size() - 1) {
colors.append(',');
}
line(sb, MessageFormat.format("{0}.setValue({1,number,0}, 0, \"{2}\");", dName, i,
value.name));
line(sb, MessageFormat.format("{0}.setValue({1,number,0}, 1, {2,number,0.0});", dName,
i, value.value));
}
colors.append(']');
// instantiate chart
String cName = "chart_" + dataName;
line(sb, MessageFormat.format(
"var {0} = new google.visualization.PieChart(document.getElementById(''{1}''));",
cName, tagId));
line(sb,
MessageFormat
.format("{0}.draw({1}, '{' title: ''{4}'', {5}, legend: '{' position:''{6}'' '}' '}');",
cName, dName, width, height, title, colors.toString(), showLegend ? "right" : "none"));
line(sb, "");
}
}
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