[news.eclipse.platform.swt] Re: Printing content of the Composite...

[grant_gayed@xxxxxxxxxx (Grant Gayed)]

Sergei,

Looking at the snippet, the mBuffer should be created on the printer, not
the display.  See
http://dev.eclipse.org/viewcvs/index.cgi/%7Echeckout%7E/platform-swt-home/faq.html#noprintimage
  If this does not solve your problem then please follow up.

Grant

user@xxxxxxxxxxxxxx wrote:

> 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();
> }