VTKCanvasWithFile.java

import java.awt.BorderLayout;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.KeyEvent;
import java.io.File;

import javax.swing.*;
import javax.swing.filechooser.FileNameExtensionFilter;

import vtk.*;

public class VTKCanvas extends JPanel {

    static {

        if (!vtkNativeLibrary.LoadAllNativeLibraries()) {
            for (vtkNativeLibrary lib : vtkNativeLibrary.values()) {
                if (!lib.IsLoaded()) {
                    System.out.println(lib.GetLibraryName() + " not loaded");
                }
            }
        }
        vtkNativeLibrary.DisableOutputWindow(null);
    }

    vtkXMLUnstructuredGridReader reader = new vtkXMLUnstructuredGridReader();
    vtkDataSetMapper surfMapper = new vtkDataSetMapper();

    public VTKCanvas() {
        setLayout(new BorderLayout());
        // Create the buttons.
        vtkCanvas renWin = new vtkCanvas();
        add(renWin, BorderLayout.CENTER);

        AxesActor aa = new AxesActor(renWin.GetRenderer());
        renWin.GetRenderer().AddActor(aa);

        vtkActor actor = new vtkActor();
        actor.SetMapper(surfMapper);
        renWin.GetRenderer().AddActor(actor);
    }

    /**
     * Menu action for opening file.
     */
    public JMenuBar createMenus() {
        // Create menu
        JMenuBar menuBar;
        JMenu menu;
        JMenuItem menuItem;

        // Create the menu bar.
        menuBar = new JMenuBar();

        // Build the first menu.
        menu = new JMenu("File");
        menu.setMnemonic(KeyEvent.VK_F);
        menuBar.add(menu);

        // A JMenuItem
        menuItem = new JMenuItem("Open XML...", KeyEvent.VK_X);
        menuItem.setAccelerator(KeyStroke.getKeyStroke(KeyEvent.VK_O,
            ActionEvent.CTRL_MASK));

        menuItem.addActionListener(new ActionListener() {

            public void actionPerformed(ActionEvent e) {
                // Create a file chooser
                final JFileChooser fc = new JFileChooser();
                FileNameExtensionFilter filter = new FileNameExtensionFilter("VTK Unstructured Grid files (*.vtu)", "vtu");
                fc.setFileFilter(filter);
                // In response to a button click:
                int returnVal = fc.showOpenDialog(null);
                if (returnVal == JFileChooser.APPROVE_OPTION) {
                    File f = fc.getSelectedFile();
                    reader.SetFileName(f.getAbsolutePath());
                    surfMapper.SetInputConnection(reader.GetOutputPort());
                    reader.Update();
                }
            }
        });
        menu.add(menuItem);

        return menuBar;
    }

    public static void main(String s[]) {
        javax.swing.SwingUtilities.invokeLater(new Runnable()
        {
            public void run()
            {

                VTKCanvas panel = new VTKCanvas();

                JFrame frame = new JFrame("VTK Canvas Test");
                frame.setJMenuBar(panel.createMenus());
                frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
                frame.getContentPane().add(panel);
                frame.setSize(600, 600);
                frame.setLocationRelativeTo(null);
                frame.setVisible(true);

                vtkReferenceInformation infos = vtkObject.JAVA_OBJECT_MANAGER.gc(true);
                System.out.println(infos);
                System.out.println(infos.listRemovedReferenceToString());
                System.out.println(infos.listKeptReferenceToString());
            }
        });
    }
}