[vtkusers] Drwaing on a vtkActor in Java

[cakbulut]

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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