[vtkusers] Drwaing on a vtkActor in Java

[Sebastien Jourdain]

Hi,

you are not doing anything wrong. The matter is the graphical
component of VTK is AWT and get draw on top of every layer.
To my knowledge, Java 7 is supposed to offer a solution to that
ordering limitation.

Seb

On Mon, Jul 25, 2011 at 2:02 PM, cakbulut <cakbulut at web.de> wrote:
> Hi all,
>
> I am using vtk for rendering DICOM images in Java. My target is to draw
> points (java Point) on the DICOM Image. The DICOM images is rendered in a
> vtkCanvas (in an extended version MyCanvas, see below) object.
>
> The following code shows the loading and adding of the vtk canvas in a
> JInternalFrame.
>
>                 vtkDICOMImageReader reader = new vtkDICOMImageReader();
>
>                 reader.SetDirectoryName("C:\\vtkDev\\Book\\data\\SE000002");
>                 reader.Update();
>
>                 mapper.SetInput(reader.GetOutput());
>
>                 actor = new vtkActor2D();
>                 actor.SetMapper(mapper);
>                 canvas.GetRenderer().AddActor2D(actor);
>                 // canvas.addMouseListener(arg0)
>
>                 this.add(canvas, BorderLayout.CENTER);
>
> Over the GUI I create a Java BufferedImage which I put on the vtkActor in
> the paint method of the canvas. In the paint method I use the Graphics
> object of the vtkCanvas and override the paint method.
>
> THE PROBLEM: The BufferedImages are not on the DICOM Image they are under
> the DICOM Image.
> What I am makeing wrong????
>
>  The code follows:
>
>         class MyCanvas extends vtkCanvas implements MouseInputListener
>         {
>                 ArrayList<Point> points = new ArrayList<Point>();
>
>                 public void mouseClicked(MouseEvent e)
>                 {
>                         int x = e.getX();
>                         int y = e.getY();
>                         points.add(new Point(x, y));
>                         //repaint();
>                 }
>
>                 public void paint(Graphics g)
>                 {
>                         super.paint(g);
>                         g.setColor(Color.RED);
>                         BufferedImage b = null;
>                         Graphics2D d2 = null;
>                         Graphics2D g2d = (Graphics2D) g;
>                         if (images.size() > 0)
>                         {
> // if (b != null)
> // g2d.drawImage(b, null, 500, 500);
>
>                                 b = images.get(0);
>
>                                 d2= b.createGraphics();
>                                 d2.setBackground(Color.YELLOW);
>                                 d2.setColor(Color.RED);
>                                 System.out.println("Hallo");
>                                 d2.drawString("ballo", 50, 50);
>                                 d2.drawLine(10, 10, 50, 50);
>                                 g2d.drawImage(b,null, 0, 0);
>
>                                 if(images.size() > 1)
>                                 {
>                                         BufferedImage b1 = images.get(1);
>                                         Graphics2D d3= b1.createGraphics();
>                                         d3.setBackground(Color.YELLOW);
>                                         d3.setColor(Color.YELLOW);
>                                         System.out.println("Hallo");
>                                         d3.drawString("sallo", 80, 80);
>                                         d3.drawLine(10, 10, 50, 40);
>                                         g2d.drawImage(b1,null, 0, 0);
>                                 }
>                         }
>
>                         // If user has chosen a point, paint a small dot on
> top.
>                         if (points != null)
>                         {
>                                 for (Point x : points)
>                                 {
>                                         g2d.setColor(Color.RED);
>                                         g2d.fillRect(x.x, x.y, 3, 3);
>                                 }
>                         }
>                 }
>
>
> Best regards.
>
> --
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