kolmck/Addons/KOLPrintDialogs.pas

unit KOLPrintDialogs;
{* Print and printer setup dialogs, implemented in KOL object.
|<br>
Ver 1.4
|<br>
Now the information about selected printer can be transferred to TKOLPrinter.
If DC is needed directly use new pdReturnDC option.}

interface

uses Windows, Messages, KOL, KOLPrintCommon;


const

  DN_DEFAULTPRN = $0001; {default printer }
  HELPMSGSTRING = 'commdlg_help';



//******************************************************************************
//   PrintDlg options
//******************************************************************************

  PD_ALLPAGES = $00000000;
  PD_SELECTION = $00000001;
  PD_PAGENUMS = $00000002;
  PD_NOSELECTION = $00000004;
  PD_NOPAGENUMS = $00000008;
  PD_COLLATE = $00000010;
  PD_PRINTTOFILE = $00000020;
  PD_PRINTSETUP = $00000040;
  PD_NOWARNING = $00000080;
  PD_RETURNDC = $00000100;
  PD_RETURNIC = $00000200;
  PD_RETURNDEFAULT = $00000400;
  PD_SHOWHELP = $00000800;
  PD_ENABLEPRINTHOOK = $00001000;
  PD_ENABLESETUPHOOK = $00002000;
  PD_ENABLEPRINTTEMPLATE = $00004000;
  PD_ENABLESETUPTEMPLATE = $00008000;
  PD_ENABLEPRINTTEMPLATEHANDLE = $00010000;
  PD_ENABLESETUPTEMPLATEHANDLE = $00020000;
  PD_USEDEVMODECOPIES = $00040000;
  PD_USEDEVMODECOPIESANDCOLLATE = $00040000;
  PD_DISABLEPRINTTOFILE = $00080000;
  PD_HIDEPRINTTOFILE = $00100000;
  PD_NONETWORKBUTTON = $00200000;


//******************************************************************************
//  Error constants
//******************************************************************************


  CDERR_DIALOGFAILURE    = $FFFF;
  CDERR_GENERALCODES     = $0000;
  CDERR_STRUCTSIZE       = $0001;
  CDERR_INITIALIZATION   = $0002;
  CDERR_NOTEMPLATE       = $0003;
  CDERR_NOHINSTANCE      = $0004;
  CDERR_LOADSTRFAILURE   = $0005;
  CDERR_FINDRESFAILURE   = $0006;
  CDERR_LOADRESFAILURE   = $0007;
  CDERR_LOCKRESFAILURE   = $0008;
  CDERR_MEMALLOCFAILURE  = $0009;
  CDERR_MEMLOCKFAILURE   = $000A;
  CDERR_NOHOOK           = $000B;
  CDERR_REGISTERMSGFAIL  = $000C;
  PDERR_PRINTERCODES     = $1000;
  PDERR_SETUPFAILURE     = $1001;
  PDERR_PARSEFAILURE     = $1002;
  PDERR_RETDEFFAILURE    = $1003;
  PDERR_LOADDRVFAILURE   = $1004;
  PDERR_GETDEVMODEFAIL   = $1005;
  PDERR_INITFAILURE      = $1006;
  PDERR_NODEVICES        = $1007;
  PDERR_NODEFAULTPRN     = $1008;
  PDERR_DNDMMISMATCH     = $1009;
  PDERR_CREATEICFAILURE  = $100A;
  PDERR_PRINTERNOTFOUND  = $100B;
  PDERR_DEFAULTDIFFERENT = $100C;


type

  PDevNames = ^tagDEVNAMES;
  tagDEVNAMES = packed record
  {*}
    wDriverOffset: Word;
    wDeviceOffset: Word;
    wOutputOffset: Word;
    wDefault: Word;
  end;








  { Structure for PrintDlg function }
  PtagPD = ^tagPD;
  tagPD  = packed record
  {*}
    lStructSize: DWORD;
    hWndOwner: HWND;
    hDevMode: HGLOBAL;
    hDevNames: HGLOBAL;
    hDC: HDC;
    Flags: DWORD;
    nFromPage: Word;
    nToPage: Word;
    nMinPage: Word;
    nMaxPage: Word;
    nCopies: Word;
    hInstance: HINST;
    lCustData: LPARAM;
    lpfnPrintHook: function(Wnd: HWND; Message: UINT; wParam: WPARAM; lParam: LPARAM): UINT stdcall;
    lpfnSetupHook: function(Wnd: HWND; Message: UINT; wParam: WPARAM; lParam: LPARAM): UINT stdcall;
    lpPrintTemplateName: PAnsiChar;
    lpSetupTemplateName: PAnsiChar;
    hPrintTemplate: HGLOBAL;
    hSetupTemplate: HGLOBAL;
  end;









function PrintDlg(var PrintDlg: tagPD): BOOL; stdcall;external 'comdlg32.dll' name 'PrintDlgA';

function CommDlgExtendedError():DWORD;stdcall; external 'comdlg32.dll'  name 'CommDlgExtendedError';















type

//////////////////////////////////////////////////////
//                                                  //
//  Print dialog and printer setup dialog.          //
//                                                  //
//////////////////////////////////////////////////////

TPrintDlgOption = (pdPrinterSetup,pdCollate,pdPrintToFile,pdPageNums,pdSelection,
pdWarning,pdDeviceDepend,pdHelp,pdReturnDC);
{* Options:
|<br>
|<ul>
|<li><b>pdPrinterSetup</b> : printer setup dialog </li>
|<li><b>pdCollate</b> : places checkmark in Collate check box.When Execute returns this flag
indicates that the user selected the Collate option but printer does not support it
|</li>
|<li><b>pdPrintToFile</b> : causes "Print to File" check box to be visible.When Execute returns this flag
indicates that this check box was selected and must be processed
|</li>
|<li><b>pdPageNums</b> : allow to select pages in dialog </li>
|<li><b>pdSelection</b> : set Selection field visible in dialog </li>
|<li><b>pdWarning</b> : when set, and there's no default printer in system, warning is generated (like in VCL  TPrintDialog) </li>
|<li><b>pdDeviceDepend</b> : disables fields : Copies,Collate if this functions aren't supported by printer driver </li>
|<li><b>pdHelp</b> : Help button is visible (owner receive HELPMSGSTRING registered message)</li>
|<li><b>pdReturnDC</b> : returns DC of selected printer </li>
|</ul>
}


TPrintDlgOptions = Set of TPrintDlgOption;
{*}

  PPrintDlg =^TPrintDlg;
  TKOLPrintDialog = PPrintDlg;
  TPrintDlg = object(TObj)
  {*}
  private
    { Private declarations }
    fDevNames : PDevNames;
    fAdvanced : WORD;
    ftagPD    : tagPD;
    fOptions  : TPrintDlgOptions;
    PrinterInfo : TPrinterInfo;
  protected
    function GetError : Integer;

    { Protected declarations }
  public
    { Public declarations }
    destructor Destroy; virtual;
    property Error : Integer read GetError;
    {* Extended error}
    property FromPage : WORD read ftagPD.nFromPage write ftagPD.nFromPage;
    {* Starting page }
    property ToPage   : WORD read ftagPD.nToPage write ftagPD.nToPage;
    {* Ending page}
    property MinPage  : WORD read ftagPD.nMinPage write ftagPD.nMinPage;
    {* Minimal page number which is allowed to select}
    property MaxPage  : WORD read ftagPD.nMaxPage write ftagPD.nMaxPage;
    {* Maximal page number which is allowed to select}
    property Copies   : WORD read ftagPD.nCopies write ftagPD.nCopies;
    {* Number of copies}
    property Options  : TPrintDlgOptions read fOptions write fOptions;
    {* Set of options}
    property DC       : hDC read ftagPD.hDC;
    {* DC of selected printer}
    function Execute : Boolean;
    {* Main method}
    function Info : PPrinterInfo;
    {*}
    {These below are usefull in Advanced mode }
    property tagPD    : tagPD read ftagPD write ftagPD;
    {* For low-level access}
    property Advanced : WORD read fAdvanced write fAdvanced;
    {* 1 := You must assign properties to tagPD by yourself
    |<br>
       2 := Even more control...
       }
    procedure FillOptions(DlgOptions : TPrintDlgOptions);
    {* Fill options}
    procedure Prepare;
    {* Destroy of prevoius context (DEVMODE,DEVNAMES,DC) .Usefull when Advanced > 0}
  end;

function NewPrintDialog(AOwner : PControl; Options : TPrintDlgOptions) : PPrintDlg;
{* Global creating function}




implementation





///////////////////////////////////////////////////////////////
//                                                           //
//  Print dialog and printer setup dialog (implementation)   //
//                                                           //
///////////////////////////////////////////////////////////////




function NewPrintDialog(AOwner : PControl; Options : TPrintDlgOptions) : PPrintDlg;
begin
    New(Result,Create);
    FillChar(Result.ftagPD,sizeof(tagPD),0);
    Result.ftagPD.hWndOwner := AOwner.GetWindowHandle;    
    Result.ftagPD.hInstance := hInstance;
    Result.fOptions := Options;
    Result.fAdvanced := 0;
end;







destructor TPrintDlg.Destroy;
begin
    Prepare;
    inherited;
end;

procedure TPrintDlg.Prepare;
begin
    if ftagPD.hDevMode <> 0 then
    begin
    GlobalFree(ftagPD.hDevMode);
    ftagPD.hDevMode :=0;
    end;
    if ftagPD.hDevNames <> 0 then
    begin
    GlobalUnlock(ftagPD.hDevNames);
    GlobalFree(ftagPD.hDevNames);
    ftagPD.hDevNames :=0;
    end;
    if ftagPD.hDC <> 0 then
    	begin
    	DeleteDC(ftagPD.hDC);
    	ftagPD.hDC :=0;
    	end;
end;


procedure TPrintDlg.FillOptions(DlgOptions : TPrintDlgOptions);
begin
  ftagPD.Flags := PD_ALLPAGES;
  { Return HDC if required}
  if pdReturnDC in DlgOptions then Inc(ftagPD.Flags,PD_RETURNDC);
  { Show printer setup dialog }
  if pdPrinterSetup in DlgOptions then Inc(ftagPD.Flags,PD_PRINTSETUP);
  { Process HELPMSGSTRING message. Note : AOwner control must register and
  process this message.}
  if pdHelp in DlgOptions then Inc(ftagPD.Flags, PD_SHOWHELP);
  { This flag indicates on return that printer driver does not support collation.
  You must eigther provide collation or set pdDeviceDepend (and user won't see
  collate checkbox if is not supported) }
  if pdCollate in DlgOptions then Inc(ftagPD.Flags,PD_COLLATE);
  { Disable some parts of PrintDlg window }
  if not (pdPrintToFile in DlgOptions) then Inc(ftagPD.Flags, PD_HIDEPRINTTOFILE);
  if not (pdPageNums in DlgOptions) then Inc(ftagPD.Flags, PD_NOPAGENUMS);
  if not (pdSelection in DlgOptions) then Inc(ftagPD.Flags, PD_NOSELECTION);
  { Disable warning if there is no default printer }
  if not (pdWarning in DlgOptions) then Inc(ftagPD.Flags, PD_NOWARNING);
  if pdDeviceDepend in DlgOptions then Inc(ftagPD.Flags,PD_USEDEVMODECOPIESANDCOLLATE);

end;

function TPrintDlg.GetError : Integer;
begin
    Result := CommDlgExtendedError();
end;

function TPrintDlg.Execute : Boolean;
var
ExitCode : Boolean;
begin
    case fAdvanced of
    0 : //Not in advanced mode
        begin
        Prepare;
        FillOptions(fOptions);
        end;
    1:Prepare; //Advanced mode . User must assign properties and/or hook procedures
    end;
    ftagPD.lStructSize := sizeof(tagPD);
    ExitCode := PrintDlg(ftagPD);
    fDevNames := PDevNames(GlobalLock(ftagPD.hDevNames));
    if (ftagPD.Flags and PD_PRINTTOFILE) <> 0 then fOptions := fOptions + [pdPrintToFile]
    else
    fOptions := fOptions - [pdPrintToFile];
    if (ftagPD.Flags and PD_COLLATE) <> 0 then fOptions := fOptions + [pdCollate]
    else
    fOptions := fOptions - [pdCollate];
    Result := ExitCode;
end;

function TPrintDlg.Info : PPrinterInfo;
begin
  try
   FillChar(PrinterInfo,sizeof(PrinterInfo),0);
    with PrinterInfo do
        begin
            ADriver  := PChar(fDevNames) + fDevNames^.wDriverOffset;
            ADevice  := PChar(fDevNames) + fDevNames^.wDeviceOffset;
            APort    := PChar(fDevNames) + fDevNames^.wOutputOffset;
            ADevMode := ftagPD.hDevMode ;
        end;
      finally //support situation when fDevNames=0 (user pressed Cancel)
    Result := @PrinterInfo;
  end;
end;

begin
end.