[news.eclipse.tools] Printing Composite...

[user@xxxxxxxxxxxxxx]

I try to print the content of my Composite.
I try to send to the printer Image mBuffer produced with my method, 
which called during redrawing.
But printer shows nothing. what is the plausible reason?

Sergei.

PrintDialog dialog = new PrintDialog(this.getShell(), SWT.NULL);
PrinterData printerData = dialog.open();
if (printerData == null)
	return;
Printer printer = new Printer(printerData);
Point screenDPI = this.getDisplay().getDPI();
Point printerDPI = printer.getDPI();
int scaleFactor = printerDPI.x / screenDPI.x;
Rectangle trim = printer.computeTrim(0, 0, 0, 0);

if (printer.startJob("Print FlowComposite")) {
	if (printer.startPage()) {
		GC gc = new GC(printer);
		
		Image mBuffer = new Image(
			FlowComposite.this.getDisplay(),
			size.x,
			size.y);
		GC gc2 = new GC(mBuffer);
		onPaint(gc2);
		gc2.dispose();
					
		gc.drawImage(
			mBuffer,
			0,
			0,
			mBuffer.getImageData().width,
			mBuffer.getImageData().height,
			-trim.x,
			-trim.y,
			scaleFactor * mBuffer.getImageData().width,
			scaleFactor * mBuffer.getImageData().height);
			gc.dispose();
			printer.endPage();
		}
		printer.endJob();
	}
	printer.dispose();
} catch (SWTError e) {
	e.printStackTrace();
}