| commit | author | age | ||
| 44bbc4 | 1 | /* |
| db91a3 | 2 | Copyright 2011 gitblit.com. |
| 44bbc4 | 3 | |
| JM | 4 | Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | you may not use this file except in compliance with the License. | |
| 6 | You may obtain a copy of the License at | |
| 7 | ||
| 8 | http://www.apache.org/licenses/LICENSE-2.0 | |
| 9 | ||
| 10 | Unless required by applicable law or agreed to in writing, software | |
| 11 | distributed under the License is distributed on an "AS IS" BASIS, | |
| 12 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | |
| 13 | See the License for the specific language governing permissions and | |
| 14 | limitations under the License. | |
| 15 | */ | |
| 16 | ||
| 17 | package com.gitblit.wicket.charting; | |
| 18 | ||
| 19 | import java.util.ArrayList; | |
| 20 | import java.util.List; | |
| 21 | ||
| 22 | import org.apache.wicket.markup.html.IHeaderContributor; | |
| 23 | import org.apache.wicket.markup.html.IHeaderResponse; | |
| 24 | ||
| 25 | /** | |
| 26 | * The Google Visualization API provides interactive JavaScript based charts and | |
| 27 | * graphs. This class implements the JavaScript header necessary to display | |
| 28 | * complete graphs and charts. | |
| 29 | * | |
| 30 | * @author James Moger | |
| 31 | * | |
| 32 | */ | |
| 33 | public class GoogleCharts implements IHeaderContributor { | |
| 34 | ||
| 35 | private static final long serialVersionUID = 1L; | |
| 36 | ||
| db91a3 | 37 | public final List<GoogleChart> charts = new ArrayList<GoogleChart>(); |
| 44bbc4 | 38 | |
| JM | 39 | public void addChart(GoogleChart chart) { |
| 40 | charts.add(chart); | |
| 41 | } | |
| 42 | ||
| 43 | @Override | |
| 44 | public void renderHead(IHeaderResponse response) { | |
| 45 | // add Google Chart JS API reference | |
| 46 | response.renderJavascriptReference("https://www.google.com/jsapi"); | |
| 47 | ||
| 48 | // prepare draw chart function | |
| 49 | StringBuilder sb = new StringBuilder(); | |
| 50 | line(sb, "google.load(\"visualization\", \"1\", {packages:[\"corechart\"]});"); | |
| 51 | line(sb, "google.setOnLoadCallback(drawChart);"); | |
| 52 | line(sb, "function drawChart() {"); | |
| 53 | ||
| 54 | // add charts to header | |
| 55 | for (GoogleChart chart : charts) { | |
| 56 | chart.appendChart(sb); | |
| 57 | } | |
| 58 | ||
| 59 | // end draw chart function | |
| 60 | line(sb, "}"); | |
| 61 | response.renderJavascript(sb.toString(), null); | |
| 62 | } | |
| 63 | ||
| 64 | private void line(StringBuilder sb, String line) { | |
| 65 | sb.append(line); | |
| 66 | sb.append('\n'); | |
| 67 | } | |
| 68 | } | |
