JAVA画SVG图(Batik框架)SVGComponentDemo

package example;import java.awt.BorderLayout;import java.awt.FlowLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import java.awt.event.WindowAdapter;import java.awt.event.WindowEvent;import java.io.File;import java.io.IOException;import javax.swing.JButton;import javax.swing.JComponent;import javax.swing.JFileChooser;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;import org.apache.batik.swing.gvt.GVTTreeRendererAdapter;import org.apache.batik.swing.gvt.GVTTreeRendererEvent;import org.apache.batik.swing.svg.GVTTreeBuilderAdapter;import org.apache.batik.swing.svg.GVTTreeBuilderEvent;import org.apache.batik.swing.svg.JSVGComponent;import org.apache.batik.swing.svg.SVGDocumentLoaderAdapter;import org.apache.batik.swing.svg.SVGDocumentLoaderEvent;public class SVGComponentDemo {    public static void main(String[] args) {        // Create a new JFrame.        JFrame f = new JFrame("Batik");        SVGComponentDemo app = new SVGComponentDemo(f);        // Add components to the frame.        f.getContentPane().add(app.createComponents());        // Display the frame.        f.addWindowListener(new WindowAdapter() {            public void windowClosing(WindowEvent e) {                System.exit(0);            }        });        f.setSize(400, 400);        f.setVisible(true);    }    // The frame.    protected JFrame frame;    // The "Load" button, which displays up a file chooser upon clicking.    protected JButton button = new JButton("Load...");    // The status label.    protected JLabel label = new JLabel();    // The SVG component    protected JSVGComponent svgComponent = new JSVGComponent(null, false, false);    public SVGComponentDemo(JFrame f) {        frame = f;    }    public JComponent createComponents() {        // Create a panel and add the button, status label and the SVG canvas.        final JPanel panel = new JPanel(new BorderLayout());        JPanel p = new JPanel(new FlowLayout(FlowLayout.LEFT));        p.add(button);        p.add(label);        panel.add("North", p);        panel.add("Center", svgComponent);        // Set the button action.        button.addActionListener(new ActionListener() {            public void actionPerformed(ActionEvent ae) {                JFileChooser fc = new JFileChooser(".//images");                int choice = fc.showOpenDialog(panel);                if (choice == JFileChooser.APPROVE_OPTION) {                    File f = fc.getSelectedFile();                    try {                        svgComponent.loadSVGDocument(f.toURL().toString());                    } catch (IOException ex) {                        ex.printStackTrace();                    }                }            }        });        // Set the JSVGComponent listeners.        svgComponent.addSVGDocumentLoaderListener(new SVGDocumentLoaderAdapter() {            public void documentLoadingStarted(SVGDocumentLoaderEvent e) {                label.setText("Document Loading...");            }            public void documentLoadingCompleted(SVGDocumentLoaderEvent e) {                label.setText("Document Loaded.");            }        });        svgComponent.addGVTTreeBuilderListener(new GVTTreeBuilderAdapter() {            public void gvtBuildStarted(GVTTreeBuilderEvent e) {                label.setText("Build Started...");            }            public void gvtBuildCompleted(GVTTreeBuilderEvent e) {                label.setText("Build Done.");                frame.pack();            }        });        svgComponent.addGVTTreeRendererListener(new GVTTreeRendererAdapter() {            public void gvtRenderingPrepare(GVTTreeRendererEvent e) {                label.setText("Rendering Started...");            }            public void gvtRenderingCompleted(GVTTreeRendererEvent e) {                label.setText("");            }        });        return panel;    }}