package vtk.sample;

import java.awt.BorderLayout;
import java.io.File;

import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;

import vtk.vtkActor;
import vtk.vtkCanvas;
import vtk.vtkCellPicker;
import vtk.vtkImageData;
import vtk.vtkImagePlaneWidget;
import vtk.vtkNativeLibrary;
import vtk.vtkOutlineFilter;
import vtk.vtkPolyDataMapper;
import vtk.vtkVolume16Reader;
import vtk.vtkAlgorithmOutput;

/**
 * Example of complex 3D widget in use.
 */
public class ImagePlaneWidget extends vtkCanvas {
  private static final long serialVersionUID = 1L;
  private int width = 512;
  private int height = 512;

  // -----------------------------------------------------------------
  // Load VTK library and print which library was not properly loaded
  static {
    if (!vtkNativeLibrary.LoadAllNativeLibraries()) {
      for (vtkNativeLibrary lib : vtkNativeLibrary.values()) {
        if (!lib.IsLoaded()) {
          System.out.println(lib.GetLibraryName() + " not loaded");
        }
      }
    }
    vtkNativeLibrary.DisableOutputWindow(null);
  }

  // -----------------------------------------------------------------

  public ImagePlaneWidget(String path) {
    // Start by loading some data.
    vtkVolume16Reader v16 = new vtkVolume16Reader();
    v16.SetDataDimensions(64, 64);
    v16.SetDataByteOrderToLittleEndian();
    v16.SetFilePrefix(path);
    v16.SetImageRange(1, 93);
    v16.SetDataSpacing(3.2, 3.2, 1.5);
    v16.Update();

    setImageData(v16.GetOutput(), v16.GetOutputPort());

    JPanel p = new JPanel();
    p.setLayout(new BorderLayout());
    p.add(this, BorderLayout.CENTER);

    JFrame frame = new JFrame("ImagePlaneWidget Test");
    frame.setBounds(10, 10, width, height);
    frame.getContentPane().add(p, BorderLayout.CENTER);
    frame.setVisible(true);
    frame.pack();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
  }

  public void setImageData(vtkImageData id, vtkAlgorithmOutput out) {
    // The shared picker enables us to use 3 planes at one time
    // and gets the picking order right
    vtkCellPicker picker = new vtkCellPicker();
    picker.SetTolerance(0.005);

    // The 3 image plane widgets are used to probe the dataset.
    vtkImagePlaneWidget planeWidgetX = new vtkImagePlaneWidget();
    planeWidgetX.DisplayTextOn();
    planeWidgetX.SetInputData(id);
    planeWidgetX.SetInteractor(getRenderWindowInteractor());
    planeWidgetX.SetPlaneOrientationToXAxes();
    planeWidgetX.SetSliceIndex(32);
    planeWidgetX.SetPicker(picker);
    planeWidgetX.SetKeyPressActivationValue('x');
    planeWidgetX.GetPlaneProperty().SetColor(1, 0, 0);
    planeWidgetX.On();

    vtkImagePlaneWidget planeWidgetY = new vtkImagePlaneWidget();
    planeWidgetY.DisplayTextOn();
    planeWidgetY.SetInputData(id);
    planeWidgetY.SetInteractor(getRenderWindowInteractor());
    planeWidgetY.SetPlaneOrientationToYAxes();
    planeWidgetY.SetSliceIndex(32);
    planeWidgetY.SetPicker(picker);
    planeWidgetY.SetKeyPressActivationValue('y');
    planeWidgetY.GetPlaneProperty().SetColor(1, 1, 0);
    planeWidgetY.SetLookupTable(planeWidgetX.GetLookupTable());
    planeWidgetY.On();

    // for the z-slice, turn off texture interpolation:
    // interpolation is now nearest neighbour, to demonstrate
    // cross-hair cursor snapping to pixel centers
    vtkImagePlaneWidget planeWidgetZ = new vtkImagePlaneWidget();
    planeWidgetZ.DisplayTextOn();
    planeWidgetZ.SetInputData(id);
    planeWidgetZ.TextureInterpolateOff();
    planeWidgetZ.SetInteractor(getRenderWindowInteractor());
    planeWidgetZ.SetPlaneOrientationToZAxes();
    planeWidgetZ.SetSliceIndex(46);
    planeWidgetZ.SetPicker(picker);
    planeWidgetZ.SetKeyPressActivationValue('z');
    planeWidgetZ.GetPlaneProperty().SetColor(0, 0, 1);
    planeWidgetZ.SetLookupTable(planeWidgetX.GetLookupTable());
    planeWidgetZ.On();

    // An outline is shown for context.
    vtkOutlineFilter outline = new vtkOutlineFilter();
    outline.SetInputConnection(out);

    vtkPolyDataMapper outlineMapper = new vtkPolyDataMapper();
    outlineMapper.SetInputConnection(outline.GetOutputPort());

    vtkActor outlineActor = new vtkActor();
    outlineActor.SetMapper(outlineMapper);

    GetRenderer().AddActor(outlineActor);

    // Add the outline actor to the renderer, set the background and size
    GetRenderer().GetCullers().RemoveAllItems();

    GetRenderer().SetBackground(0.1, 0.1, 0.2);
  }

  static public void printUsage(String err) {
    if (!err.equals("")) {
      System.err.println("Error: " + err);
    }
    System.err.println("Usage: java ImagePlaneWidget [-D path]");
    System.err.println("Where:");
    System.err.println("      path is location of your VTKData directory");
    System.exit(-1);
  }

  public static void main(String[] argv) {
    int argSize = argv.length;
    String pathToVTKData = "";
    int argCurrent = 0;

    try {
      while (argSize > argCurrent) {
        if (argv[argCurrent].equals("-D")) {
          ++argCurrent;
          pathToVTKData = argv[argCurrent];
          ++argCurrent;
        } else {
          ImagePlaneWidget.printUsage("");
        }
      }
    } catch (Exception e) {
      ImagePlaneWidget.printUsage("");
    }

    if (pathToVTKData.equals(""))
      ImagePlaneWidget.printUsage("");

    final File f = new File(pathToVTKData + "/Data/headsq");
    if (!f.exists() || !f.canRead() || !f.isDirectory())
      ImagePlaneWidget.printUsage(f.getAbsolutePath() + " does not exist or cannot be read.");

    SwingUtilities.invokeLater(new Runnable() {
      public void run() {
        new ImagePlaneWidget(f.getAbsolutePath() + "/quarter");
      }
    });
  }
}