/*
* Copyright 2009 Prime Technology.
*
* 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 org.primefaces.component.chart;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import javax.el.ValueExpression;
import javax.faces.component.UIComponent;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import org.primefaces.component.chart.series.ChartSeries;
import org.primefaces.event.ItemSelectEvent;
import org.primefaces.renderkit.CoreRenderer;
import org.primefaces.resource.ResourceUtils;
import org.primefaces.util.ComponentUtils;
public class BaseChartRenderer extends CoreRenderer {
@Override
public void decode(FacesContext facesContext, UIComponent component) {
String clientId = component.getClientId(facesContext);
Map<String,String> params = facesContext.getExternalContext().getRequestParameterMap();
if(params.containsKey(clientId)) {
int seriesIndex = Integer.parseInt(params.get("seriesIndex"));
int itemIndex = Integer.parseInt(params.get("itemIndex"));
component.queueEvent(new ItemSelectEvent(component, itemIndex, seriesIndex));
}
}
public void encodeEnd(FacesContext facesContext, UIComponent component) throws IOException{
UIChart chart = (UIChart) component;
encodeResources(facesContext);
encodeMarkup(facesContext, chart);
encodeScript(facesContext, chart);
}
/**
* Each chart renderer should override this method
*
* @param facesContext
* @param chart
* @throws IOException
*/
protected void encodeScript(FacesContext facesContext, UIChart chart) throws IOException {
}
protected List<ChartSeries> getSeries(UIChart chart) {
List<UIComponent> children = chart.getChildren();
List<ChartSeries> series = new ArrayList<ChartSeries>();
for (UIComponent component : children) {
if(component instanceof ChartSeries && component.isRendered())
series.add((ChartSeries) component);
}
return series;
}
protected String getChartVar(UIChart chart) {
return createUniqueWidgetVar(FacesContext.getCurrentInstance(), chart);
}
protected String getDataSourceVar(UIChart chart) {
return getChartVar(chart) + "_dataSource";
}
protected String getLocalDataVar(UIChart chart) {
return getChartVar(chart) + "_data";
}
protected String getSeriesDefVar(UIChart chart) {
return getChartVar(chart) + "_seriesDef";
}
protected String getFieldName(ValueExpression fieldExpression) {
String expressionString = fieldExpression.getExpressionString();
String expressionContent = expressionString.substring(2, expressionString.length() - 1);
int firstIndex = expressionContent.indexOf("[");
if(firstIndex != -1) {
int lastIndex = expressionContent.indexOf("]");
return expressionContent.substring(firstIndex + 1, lastIndex);
} else {
String[] tokens = expressionContent.split("\\.");
return tokens[tokens.length-1];
}
}
protected void encodeResources(FacesContext facesContext) throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
writer.startElement("script", null);
writer.writeAttribute("type", "text/javascript", null);
writer.write("YAHOO.widget.Chart.SWFURL = '" + ResourceUtils.getResourceURL(facesContext, "/yui/charts/assets/charts.swf") + "'");
writer.endElement("script");
}
protected void encodeMarkup(FacesContext facesContext, UIChart chart) throws IOException{
ResponseWriter writer = facesContext.getResponseWriter();
writer.startElement("div", null);
writer.writeAttribute("id", chart.getClientId(facesContext), null);
writer.writeAttribute("style", "width:" + chart.getWidth() + ";height:" + chart.getHeight(), null);
if(chart.getStyleClass() != null)
writer.writeAttribute("class", chart.getStyleClass(), "styleClass");
writer.endElement("div");
}
protected void encodeItemSelectEvent(FacesContext facesContext, UIChart chart) throws IOException {
ResponseWriter writer = facesContext.getResponseWriter();
String clientId = chart.getClientId(facesContext);
String formClientId = ComponentUtils.findParentForm(facesContext, chart).getClientId(facesContext);
writer.write(getChartVar(chart) + ".subscribe('itemClickEvent', PrimeFaces.widget.ChartUtils.itemSelectHandler, {clientId:'" + clientId + "'");
writer.write(",url:'" + getActionURL(facesContext) + "'");
writer.write(",formId:'" + formClientId + "'");
writer.write(",update:'" + ComponentUtils.findClientIds(facesContext, chart, chart.getUpdate()) + "'");
if(chart.getOncomplete() != null)
writer.write(",oncomplete: function() {" + chart.getOncomplete() + ";}");
writer.write("});");
}
public void encodeChildren(FacesContext context, UIComponent component) throws IOException {
//Do Nothing
}
public boolean getRendersChildren() {
return true;
}
}