Printers.Printer Function

Returns a global instance of TPrinter to manage interaction with the printer.

Pascal

function Printer: TPrinter;

C++

TPrinter Printer();

File

Printers

Description

Printer creates an instance of a global TPrinter object the first time it is called. Use the Printer function to print using the TPrinter object.

Printer is declared in the Printers unit. To use the Printer function and the TPrinter object, add Printers to the uses clause of your unit (Delphi) or include Printers.hpp in the source file (C++).

C++ Examples:

Copy Code

{
This example uses a button, a Page Control, and a Print 
dialog box on a form. When the user clicks the button, the 
print dialog is displayed.  The user can select any subset 
of the pages in the page control for printing.  The selected
pages are then printed.  To run this example successfully, 
you must add the Printers unit to the uses clause of your 
unit.  Right click on the PageControl to add at least one 
page to the PageControl.
*/
void __fastcall TForm1::Button1Click(TObject *Sender)
{
  PrintDialog1->Options.Clear();
  PrintDialog1->Options << poPageNums << poSelection;
  PrintDialog1->FromPage = 1;
  PrintDialog1->MinPage = 1;
  PrintDialog1->ToPage = PageControl1->PageCount;
  PrintDialog1->MaxPage = PageControl1->PageCount;
  if (PrintDialog1->Execute())
  {
    int Start, Stop;
    // determine the range the user wants to print
    switch (PrintDialog1->PrintRange)
    {
      case prSelection:
        Start = PageControl1->ActivePage->PageIndex;
        Stop = Start;
        break;
      case prPageNums:
        Start = PrintDialog1->FromPage - 1;
        Stop =  PrintDialog1->ToPage - 1;
        break;
      default:  // prAllPages
        Start = PrintDialog1->MinPage - 1;
        Stop = PrintDialog1->MaxPage - 1;
        break;
    }
    // now, print the pages 
    Printer()->BeginDoc();
    for (int i = Start; i <= Stop; i++)
    {
      PageControl1->Pages[i]->PaintTo(Printer()->Handle, 10, 10);
      if (i != Stop)
        Printer()->NewPage();
    }
    Printer()->EndDoc();
  }
}

Delphi Examples:

Copy Code

{
This example uses a button, a Page Control, and a Print 
dialog box on a form. When the user clicks the button, the 
print dialog is displayed.  The user can select any subset 
of the pages in the page control for printing.  The selected
pages are then printed.  To run this example successfully, 
you must add the Printers unit to the uses clause of your 
unit.  Right click on the PageControl to add at least one 
page to the PageControl.
}
procedure TForm1.Button1Click(Sender:TObject);
var
  I, Start, Stop: Integer;
begin
PrintDialog1.Options := [poPageNums, poSelection];
PrintDialog1.FromPage := 1;
PrintDialog1.MinPage := 1;
PrintDialog1.ToPage := PageControl1.PageCount;
PrintDialog1.MaxPage := PageControl1.PageCount;

if PrintDialog1.Execute() then
  begin
    { determine the range the user wants to print }
    with PrintDialog1 do
    begin
      if PrintRange = prAllPages then
        begin
        Start := MinPage - 1;
        Stop := MaxPage - 1;
      end
      else if PrintRange = prSelection then
      begin
        Start := PageControl1.ActivePage.PageIndex;
        Stop := Start;
        end
      else  { PrintRange = prPageNums }
      begin
        Start := FromPage - 1;
        Stop := ToPage - 1;
      end;
    end;
    { now, print the pages }
    with Printer do
    begin
      BeginDoc;
      for I := Start to Stop do
      begin
        PageControl1.Pages[I].PaintTo(Handle, 10, 10);
        if I <> Stop then
          NewPage;
      end;
      EndDoc;
    end;
  end;
end;