ui/src/main/java/ucar/nc2/ui/image/SourcePicture.java
public void loadPictureInThread( URL imageUrl, int priority, double rotation ) {
		if ( pictureStatusCode == LOADING ) {
			stopLoadingExcept( imageUrl );
		}
		
		this.imageUrl = imageUrl;
		this.rotation = rotation;
		LoadThread t = new LoadThread( this );
		t.setPriority( priority );
		t.start();
	}
public void loadPictureInThread( URL imageUrl, int priority, double rotation ) {
		if ( pictureStatusCode == LOADING ) {
			stopLoadingExcept( imageUrl );
		}
		
		this.imageUrl = imageUrl;
		this.rotation = rotation;
		LoadThread t = new LoadThread( this );
		t.setPriority( priority );
		t.start();
	}
method to invoke with a filename or URL of a picture that is to be loaded
a new thread. This is handy to update the screen while the loading chuggs along in the background.

@param	imageUrl	The URL of the image to be loaded
@param	priority	The Thread priority for this thread.
@param	rotation	The rotation 0-360 to be used on this picture