public void BrowserPrint()
{
var browser = ((GeckoWebBrowser)_pdfViewerControl);
using (AutoJSContext context = new AutoJSContext(browser.Window)) {
nsIDOMWindow domWindow = browser.Window.DomWindow;
nsIWebBrowserPrint print = Xpcom.QueryInterface <nsIWebBrowserPrint> (domWindow);
try {
if (PrintProgress != null)
{
// Send event to disable print, simple, outside cover and inside buttons
// while printing
PrintProgress.Invoke(this, new PdfPrintProgressEventArgs(true));
}
_printing = true;
print.Print(null, this);
} catch (COMException e) {
if (PrintProgress != null)
{
PrintProgress.Invoke(this, new PdfPrintProgressEventArgs(false));
}
//NS_ERROR_ABORT means user cancelled the printing, not really an error.
if (e.ErrorCode != GeckoError.NS_ERROR_ABORT)
{
throw;
}
}
finally {
Marshal.ReleaseComObject(print);
}
}
}
public void OnStateChange(nsIWebProgress aWebProgress, nsIRequest aRequest, uint aStateFlags, int aStatus)
{
if (_printing && ((aStateFlags & STATE_STOP) != 0))
{
_printing = false;
if (PrintProgress != null)
{
PrintProgress.Invoke(this, new PdfPrintProgressEventArgs(false));
}
}
}