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getting a printers paperforms and their sizes

Posted on 2003-12-11
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Last Modified: 2010-04-05
Hi there,

I'm having problems finding the size of the different paper forms a printer support. Enumerating for the forms is no problem, but getting the actual size in millimeters or similiar is. Im using DeviceCapabilities to get the form names, but then what ? I've found EnumForms in the API but can't figure out how to use it correctly (it doesn't return any forms, and how the heck do i get the size from a sizel type ??)

Any help ?

Best regards
NetGeek
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Question by:NetGeek
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4 Comments
 
LVL 17

Accepted Solution

by:
geobul earned 250 total points
ID: 9920942
Hi,

Try this (the listbox contains the names of the printers):

type
  TForm1 = class(TForm)
    Button1: TButton;
    re: TRichEdit;
    lb: TListBox;
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}

uses Printers, WinSpool;

procedure TForm1.Button1Click(Sender: TObject);
var
  PHD         : THandle;
  info        : array [0..10000] of TFormInfo1;
  pcbNeeded   : DWORD;
  pcReturned  : DWORD;
  i: integer;
begin
 if OpenPrinter(PChar(lb.Items[lb.ItemIndex]), PHD, nil) then begin // open the printer
    EnumForms(PHD, 1, @Info, SizeOf(Info), pcbNeeded, pcReturned); // get the info
    for i := 0 to 10000 do begin
      if Info[i].pName = nil then exit;
      re.Lines.Add(Info[i].pName); // name of the form
      re.Lines.Add(IntToStr(Info[i].Size.cx)); // width
      re.Lines.Add(IntToStr(Info[i].Size.cy)); // height
      re.Lines.Add('');
    end;
    ClosePrinter(PHD);
  end else ShowMessage('Cannot open the printer');
end;

Regards, Geo
0
 
LVL 17

Expert Comment

by:geobul
ID: 9920983
If you want to get the sizes only:

procedure TForm1.Button3Click(Sender: TObject);
var
  p: array [0..10000] of char;
  a: array of TPoint;
  i, res: integer;
begin
  res := DeviceCapabilities(PChar(lb.Items[lb.ItemIndex]), nil, DC_PAPERSIZE, p, nil);
  if res > 0 then begin
    SetLength(a, res);
    move(p, a[0], res * SizeOf(Tpoint));
    for i := 0 to res - 1 do begin
      re.Lines.Add(IntToStr(a[i].x)+':'+IntToStr(a[i].y));
    end;
  end;
end;

Regards, Geo
0
 

Author Comment

by:NetGeek
ID: 9922959
thank you very much geobul :) it wa the openprinter i'd forgotten.

got any code at hand showing how to select a specific form by name for the current printer ?

Best regards
Netgeek
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LVL 17

Expert Comment

by:geobul
ID: 9926666
I don't have the code but I think you could try Printer.GetPrinter and Printer.SetPrinter methods. First call GetPrinter in order to obtain the DEVMODE structure. Then set dmFields to DM_FORMNAME and dmFormName member of that structure to the name of the form you want to set to (and others also perhaps - dmPaperLength and dmPaperWidth). Then use Printer.SetPrinter to save the change. Help says that this member doesn't work in Win9x though. There are predefined form constants in Windows.pas (DMPAPER_LETTER = 1, etc.). You may also use them setting dmPaperSize member of DEVMODE only. What is interesting is DMPAPER_USER constant. You can create your own page size setting dmPaperSize to DMPAPER_USER and dmPaperWidth and dmPaperLength to what you need (in tenths of millimeter). Something like:

var
Device : array[0..255] of char;
Driver : array[0..255] of char;
Port   : array[0..255] of char;
hDMode : THandle;
PDMode : PDEVMODE;
begin
 Printer.GetPrinter(Device, Driver, Port, hDMode);
 if hDMode <> 0 then begin
   pDMode := GlobalLock(hDMode);
   if pDMode <> nil then begin

    {Set to legal}
     pDMode^.dmFields := pDMode^.dmFields or dm_PaperSize;
     pDMode^.dmPaperSize := DMPAPER_LEGAL;

    {or Set to custom size}
     pDMode^.dmFields := pDMode^.dmFields or
                         DM_PAPERSIZE or
                         DM_PAPERWIDTH or
                         DM_PAPERLENGTH;
     pDMode^.dmPaperSize := DMPAPER_USER;
     pDMode^.dmPaperWidth := 1000;
     pDMode^.dmPaperLength := 2000;

    {Set the bin to use}
     pDMode^.dmFields := pDMode^.dmFields or DMBIN_MANUAL;
     pDMode^.dmDefaultSource := DMBIN_MANUAL;
     
     Printer.SetPrinter(Device,Driver,Port,hDMode);

     GlobalUnlock(hDMode);
  end;
 end;
...

Regards, Geo
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