Re: exception cannot call getImage() from Thread: AWT-EventQueue-1

  • To: ncubukcu@xxxxxxxxx
  • Subject: Re: exception cannot call getImage() from Thread: AWT-EventQueue-1
  • From: Curtis Rueden <ctrueden@xxxxxxxx>
  • Date: Mon, 01 May 2006 15:47:53 -0500
Hi Nihat,

The code below looks good. You can add the display to a user interface with:

JFrame f = new JFrame("My Frame");
JPanel p = new JPanel();
p.setLayout(new BorderLayout());
f.setContentPane(p);
p.add(display.getComponent(), BorderLayout.CENTER);
f.show();

Or some similar block of code.

There is no need to call getImage just to blit the image to a canvas on screen. However, if you want to save a JPEG of the display to disk or some such, then getImage is useful. However, you should not need to call getImage for every frame -- just when the user clicks a "Save" button or some such.

Also, if you are taking multiple snapshots, you only need build the display and maps once. Then you can just call data_ref.setData(newField) with your new data, and display.getImage() to get a new snapshot, each time.

-Curtis

ncubukcu wrote:

Thanks Curtis
I think I got it working now. You are right that my com.app.lt.CreateImage throws me an image using getImage(). I don't know any other way of creating an image in visad. Is there a shorter way to add scalar maps to an image other than what I use below? .
.
   contMap = new ScalarMap( field, Display.IsoContour );
   colMap = new ScalarMap( longitude, Display.XAxis );
   rowMap = new ScalarMap( latitude,    Display.YAxis );
   pixMap = new ScalarMap( field,  Display.RGB );
   DisplayImplJ2D display = new DisplayImplJ2D(" ", 700, 500);

GraphicsModeControl dispGMC = (GraphicsModeControl) display.getGraphicsModeControl();
   dispGMC.setScaleEnable(true);

   // Add maps to display
   display.addMap( colMap );
   display.addMap( rowMap );
   display.addMap( pixMap );
   display.addMap( contMap );
  // Create a data reference and set the FlatField as our data
   DataReferenceImpl data_ref = new DataReferenceImpl("data_ref");
   data_ref.setData( mapField );
   // Add reference to display
   display.addReference( data_ref );    return display.getImage();

Thanks again for your help
nihat


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