From 44bbc4303443cb2122f69545ff85012cc3a94576 Mon Sep 17 00:00:00 2001
From: James Moger <james.moger@gitblit.com>
Date: Wed, 16 Nov 2011 22:22:07 -0500
Subject: [PATCH] Preliminary charting classes for Google's Visualization API
---
src/com/gitblit/wicket/charting/GoogleChart.java | 101 ++++++++++++++++++++
src/com/gitblit/wicket/charting/GooglePieChart.java | 65 +++++++++++++
src/com/gitblit/wicket/charting/GoogleCharts.java | 68 +++++++++++++
src/com/gitblit/wicket/charting/GoogleLineChart.java | 60 ++++++++++++
4 files changed, 294 insertions(+), 0 deletions(-)
diff --git a/src/com/gitblit/wicket/charting/GoogleChart.java b/src/com/gitblit/wicket/charting/GoogleChart.java
new file mode 100644
index 0000000..b6309ff
--- /dev/null
+++ b/src/com/gitblit/wicket/charting/GoogleChart.java
@@ -0,0 +1,101 @@
+/*
+ * 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.io.Serializable;
+import java.util.ArrayList;
+import java.util.List;
+
+import com.gitblit.utils.StringUtils;
+
+/**
+ * Abstract parent class for Google Charts built with the Visualization API.
+ *
+ * @author James Moger
+ *
+ */
+public abstract class GoogleChart implements Serializable {
+
+ private static final long serialVersionUID = 1L;
+ final String tagId;
+ final String dataName;
+ final String title;
+ final String keyName;
+ final String valueName;
+ final List<ChartValue> values;
+ int width;
+ int height;
+
+ public GoogleChart(String tagId, String title, String keyName, String valueName) {
+ this.tagId = tagId;
+ this.dataName = StringUtils.getSHA1(title).substring(0, 8);
+ this.title = title;
+ this.keyName = keyName;
+ this.valueName = valueName;
+ values = new ArrayList<ChartValue>();
+ }
+
+ public void setWidth(int width) {
+ this.width = width;
+ }
+
+ public void setHeight(int height) {
+ this.height = height;
+ }
+
+ public void addValue(String name, int value) {
+ values.add(new ChartValue(name, value));
+ }
+
+ public void addValue(String name, float value) {
+ values.add(new ChartValue(name, value));
+ }
+
+ public void addValue(String name, double value) {
+ values.add(new ChartValue(name, (float) value));
+ }
+
+ protected abstract void appendChart(StringBuilder sb);
+
+ protected void line(StringBuilder sb, String line) {
+ sb.append(line);
+ sb.append('\n');
+ }
+
+ protected class ChartValue implements Serializable, Comparable<ChartValue> {
+
+ private static final long serialVersionUID = 1L;
+
+ final String name;
+ final float value;
+
+ ChartValue(String name, float value) {
+ this.name = name;
+ this.value = value;
+ }
+
+ @Override
+ public int compareTo(ChartValue o) {
+ // sorts the dataset by largest value first
+ if (value > o.value) {
+ return -1;
+ } else if (value < o.value) {
+ return 1;
+ }
+ return 0;
+ }
+ }
+}
diff --git a/src/com/gitblit/wicket/charting/GoogleCharts.java b/src/com/gitblit/wicket/charting/GoogleCharts.java
new file mode 100644
index 0000000..9e1572e
--- /dev/null
+++ b/src/com/gitblit/wicket/charting/GoogleCharts.java
@@ -0,0 +1,68 @@
+/*
+ Copyright 2011 comSysto GmbH
+
+ 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.util.ArrayList;
+import java.util.List;
+
+import org.apache.wicket.markup.html.IHeaderContributor;
+import org.apache.wicket.markup.html.IHeaderResponse;
+
+/**
+ * The Google Visualization API provides interactive JavaScript based charts and
+ * graphs. This class implements the JavaScript header necessary to display
+ * complete graphs and charts.
+ *
+ * @author James Moger
+ *
+ */
+public class GoogleCharts implements IHeaderContributor {
+
+ private static final long serialVersionUID = 1L;
+
+ private List<GoogleChart> charts = new ArrayList<GoogleChart>();
+
+ public void addChart(GoogleChart chart) {
+ charts.add(chart);
+ }
+
+ @Override
+ public void renderHead(IHeaderResponse response) {
+ // add Google Chart JS API reference
+ response.renderJavascriptReference("https://www.google.com/jsapi");
+
+ // prepare draw chart function
+ StringBuilder sb = new StringBuilder();
+ line(sb, "google.load(\"visualization\", \"1\", {packages:[\"corechart\"]});");
+ line(sb, "google.setOnLoadCallback(drawChart);");
+ line(sb, "function drawChart() {");
+
+ // add charts to header
+ for (GoogleChart chart : charts) {
+ chart.appendChart(sb);
+ }
+
+ // end draw chart function
+ line(sb, "}");
+ response.renderJavascript(sb.toString(), null);
+ }
+
+ private void line(StringBuilder sb, String line) {
+ sb.append(line);
+ sb.append('\n');
+ }
+}
\ No newline at end of file
diff --git a/src/com/gitblit/wicket/charting/GoogleLineChart.java b/src/com/gitblit/wicket/charting/GoogleLineChart.java
new file mode 100644
index 0000000..c1becfc
--- /dev/null
+++ b/src/com/gitblit/wicket/charting/GoogleLineChart.java
@@ -0,0 +1,60 @@
+/*
+ * 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;
+
+/**
+ * Builds an interactive line chart using the Visualization API.
+ *
+ * @author James Moger
+ *
+ */
+public class GoogleLineChart extends GoogleChart {
+
+ private static final long serialVersionUID = 1L;
+
+ public GoogleLineChart(String tagId, String title, String keyName, String valueName) {
+ super(tagId, title, keyName, valueName);
+ }
+
+ @Override
+ protected void appendChart(StringBuilder sb) {
+ 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()));
+
+ for (int i = 0; i < values.size(); i++) {
+ ChartValue value = values.get(i);
+ 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));
+ }
+
+ String cName = "chart_" + dataName;
+ line(sb, MessageFormat.format(
+ "var {0} = new google.visualization.LineChart(document.getElementById(''{1}''));",
+ cName, tagId));
+ line(sb,
+ MessageFormat
+ .format("{0}.draw({1}, '{'width: {2,number,0}, height: {3,number,0}, pointSize: 4, chartArea:'{'left:20,top:20'}', legend: ''none'', title: ''{4}'' '}');",
+ cName, dName, width, height, title));
+ line(sb, "");
+ }
+}
\ No newline at end of file
diff --git a/src/com/gitblit/wicket/charting/GooglePieChart.java b/src/com/gitblit/wicket/charting/GooglePieChart.java
new file mode 100644
index 0000000..8367c42
--- /dev/null
+++ b/src/com/gitblit/wicket/charting/GooglePieChart.java
@@ -0,0 +1,65 @@
+/*
+ * 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.Collections;
+
+/**
+ * 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);
+
+ for (int i = 0; i < values.size(); i++) {
+ ChartValue value = values.get(i);
+ 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));
+ }
+
+ // 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}, '{'width: {2,number,0}, height: {3,number,0}, chartArea:'{'left:20,top:20'}', title: ''{4}'' '}');",
+ cName, dName, width, height, title));
+ line(sb, "");
+ }
+}
\ No newline at end of file
--
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