/*
* Copyright 2012 Rui Afonso
*
* 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.googlecode.gwt.charts.client;
import com.google.gwt.core.client.JsArrayString;
import com.google.gwt.i18n.client.LocaleInfo;
import com.googlecode.gwt.charts.client.ajaxloader.AjaxLoader;
import com.googlecode.gwt.charts.client.ajaxloader.AjaxLoader.AjaxLoaderOptions;
/**
* Utility class for loading the Chart Tools API using the Google Ajax Loader.
*/
public class ChartLoader {
private static final String API_NAME = "visualization";
private static final String API_VERSION = "1.0";
private ChartPackage[] packages;
private String language;
private String version;
/**
* Creates a chart loader with the specified packages.
*
* @param packages a list of ChartPackage's
*/
public ChartLoader(ChartPackage... packages) {
setPackages(packages);
setLanguage(LocaleInfo.getCurrentLocale().getLocaleName());
setVersion(API_VERSION);
}
/**
* @return the language
*/
public String getLanguage() {
return language;
}
/**
* @return the packages
*/
public ChartPackage[] getPackages() {
return packages;
}
/**
* @return the version
*/
public String getVersion() {
return version;
}
/**
* Loads requested API libraries and calls an handler after finished.
*
* @param callback the handler to be called
*/
public void loadApi(Runnable callback) {
AjaxLoaderOptions options = AjaxLoaderOptions.newInstance();
JsArrayString packagesArray = JsArrayString.createArray().cast();
for (int i = 0; i < packages.length; i++) {
packagesArray.push(packages[i].getName());
}
options.setPackages(packagesArray);
if (language != null) {
options.setLanguage(language);
}
AjaxLoader.loadApi(API_NAME, version, callback, options);
}
/**
* @param language the language to set
*/
public void setLanguage(String language) {
this.language = language;
}
/**
* @param packages the packages to set
*/
public void setPackages(ChartPackage... packages) {
this.packages = packages;
}
/**
* @param version the version to set
*/
public void setVersion(String version) {
this.version = version;
}
}