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

[Curtis Rueden]

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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