Dear Wiki user, You have subscribed to a wiki page or wiki category on "Tapestry Wiki" for change notification.
The "Tapestry5HowToCreateGenericGraph Component" page has been changed by GregPagendamTurner. http://wiki.apache.org/tapestry/Tapestry5HowToCreateGenericGraph%20Component -------------------------------------------------- New page: Based on the [[Tapestry5HowToCreateASimpleGraphComponent]] this is how you can create a component that can be passed a JFreeChart object to allow you to create any kind of chart To use add this to your page: {{{ <t:chart width="200" height="150" chart="lineChart"/> }}} add this to your page class: {{{ public JFreeChart getLineChart() { XYSeries series = new XYSeries("Average Size"); series.add(20.0, 10.0); series.add(40.0, 20.0); series.add(70.0, 50.0); XYDataset xyDataset = new XYSeriesCollection(series); final JFreeChart chart = ChartFactory.createXYLineChart ("Sample XY Chart", // Title "Height", // X-Axis label "Weight", // Y-Axis label xyDataset, // Dataset PlotOrientation.HORIZONTAL, true, // Show legend true, // Tooltips true // Urls ); return chart; } }}} add this to your pom.xml under "dependencies": {{{ <dependency> <groupId>jfree</groupId> <artifactId>jfreechart</artifactId> <version>1.0.5</version> </dependency> }}} '''Source:'''<<BR>> (put this component class into yourApp.components package) {{{ package com.liftyourgame.application.components; import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.IOException; import java.io.InputStream; import org.apache.tapestry5.ComponentResources; import org.apache.tapestry5.Link; import org.apache.tapestry5.MarkupWriter; import org.apache.tapestry5.StreamResponse; import org.apache.tapestry5.annotations.Parameter; import org.apache.tapestry5.annotations.Persist; import org.apache.tapestry5.dom.Element; import org.apache.tapestry5.ioc.annotations.Inject; import org.apache.tapestry5.ioc.services.TypeCoercer; import org.apache.tapestry5.services.Response; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; public class Chart { @Inject private ComponentResources _resources; @Inject private TypeCoercer _coercer; /**list(array) of paired values(label & value): [String,Number,String,Number,...]*/ @Parameter(required=true) private JFreeChart _chart; @Persist private JFreeChart _context; @Parameter(required=true) private int _width; @Parameter(required=true) private int _height; void beginRender(MarkupWriter writer) { Object[] params = new Object[2]; _context=_chart; params[0] = new Integer(_width); params[1] = new Integer(_height); //generate action link Link link = _resources.createEventLink("chart", params); Element img = writer.element("img", "src", link); _resources.renderInformalParameters(writer); } void afterRender(MarkupWriter writer) { writer.end(); } public StreamResponse onChart(final int width, final int height/*, Object ...rest*/){ return new StreamResponse(){ public String getContentType(){ return "image/jpeg"; } public InputStream getStream() throws IOException { BufferedImage image = _context.createBufferedImage(width, height); ByteArrayOutputStream byteArray = new ByteArrayOutputStream() ; ChartUtilities.writeBufferedImageAsJPEG(byteArray, image) ; return new ByteArrayInputStream(byteArray.toByteArray()); } public void prepareResponse(Response response){} }; }} }}} --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
