swing - Java 2d coordinate transformation -


I am trying to plot a graph using the Java 2D graphics library and I thought it was with me Was there. I want to plot in the coordination system, where 0,0 is in the center of the panel on the left side, I used the following code and I was feeling that the result was necessary to me. 

  Private Wide Doodro (Graphics G) {Graphics2D g2d = (Graphics2D) g; AffineTransform saveAT = g2d.getTransform (); // Get height height of panel height = getHeight (); // Find between dual panels = ((double) height) /2.0; AffineTransform tform = AffineTransform.getTranslateInstance (0.0, yTrans); g2d.setTransform (tform); // Draw the line for the x-axis G2d.drawLine (0, 0, 100, 0); / / Old Transform G2D. Restore the transformations (CATAT); }   
 Plotted the original centered in this window.  
 The problem shows when I added a menu, it was originally offset in the Y direction, it should be twice as high as the menu's size. Do I need an account for the menu size and other containers that I add to the panel?  
  Private Zero Dood (Graphics G) {Graphics2D g2d = (Graphics2D) g.create (); Int height = getHeight (); Double yTrans = ((double) height) / 2.0.0; AffineTransform tform = AffineTransform.getTranslateInstance (0.0, yTrans); g2d.transform (tform); // Draw the line for the x-axis G2d.drawLine (0, 0, 100, 0); }   
 works, thanks for your help   
 
 
 You might try out the outline of the view  
 for the basic center on the left side,        >   previous>  g2d.translate (0, H / 2);   
 To get an honest, cartesian coordinate, use  
  g2d.scale (1, -1);

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