PrinterAborted (C++)

Description

The following code displays a dialog box if the print job was aborted. This code aborts a print job if you press Esc. Note that you should set KeyPreview to True to ensure that the OnKeyDown event handler of Form1 is called. Also notice that the Button1Click routine continues to run even after the print job has been aborted.

Code

void __fastcall TForm1::Button1Click(TObject *Sender)
{
  TMemo *Memo1 = new TMemo(Form1); // The parent (Form1) will clean up this object.
  Memo1->Parent = Form1;
  Memo1->Visible = True;
  Memo1->Width = 700;
  if (OpenDialog1->Execute())
  {
	Memo1->Lines->LoadFromFile(OpenDialog1->FileName);

	Printer()->BeginDoc();
	int X = 200;
	int Y = 200;
	for (int I = 0; I <= 140; I++)
	  if (!Printer()->Aborted)
	  {
		Printer()->Canvas->TextOut(X, Y, Memo1->Lines->Strings[I]);
		Y = Y + 80;
		if (Y > (Printer()->PageHeight - 300))
		{
		  Y = 200;
		  Printer()->NewPage();
		  Sleep(1000);  // Used to give you time to abort
		}
	  }
	if (!Printer()->Aborted) Printer()->EndDoc();
  }
  if (Printer()->Aborted)
	MessageDlg(
	  "The print job did not finish printing",
	  mtInformation, TMsgDlgButtons() << mbOK, 0);
}

__fastcall TForm1::TForm1(TComponent* Owner)
  : TForm(Owner)
{
  KeyPreview = True;
}

void __fastcall TForm1::FormKeyDown(TObject *Sender, WORD &Key, TShiftState Shift)

{
  if (Key == VK_ESCAPE && Printer()->Printing)
  {
	Printer()->Abort();
	MessageDlg("Printing aborted", mtInformation,
               TMsgDlgButtons() << mbOK,0);
  }

}

Uses

• Vcl.Printers.TPrinter.Aborted ( fr | de | ja )