CICA 1993 April/CICA MS Windows - April 1993.iso/unzipped/programr/bcpp/cmmdlg/printdlg.pas

Pascal/Delphi Source File | 1992-09-07 | 5KB | 202 lines

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{   \\\                                    }
{  -(j)-                                   }
{    /juanca                               }
{    ~                                     }
{$D ⌐ ACASA 1989-1992, All rights reserved }
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{Shell objects around the Print and PrinterSetup dialogs }

UNIT PRINTDLG;
{$C MOVEABLE DEMANDLOAD DISCARDABLE}
INTERFACE
  USES
    WINTYPES,
    WOBJECTS,
    COMMDLG,
    COMONDLG;


  TYPE
    pPrintSetupDlg = ^tPrintSetupDlg;
    tPrintSetupDlg = OBJECT ( tCommonDlg )

      printerData : pPrintDlg;

      CONSTRUCTOR
      init(iparent:PWindowsObject; name :PChar; idata :pPrintDlg);

      PROCEDURE
      preparePrinterData;
        virtual;

      FUNCTION
      printFlags :Longint;
        virtual;

      FUNCTION
      execute:Integer;
        virtual;

    END;

    pPrintOptDlg = ^tPrintOptDlg;
    tPrintOptDlg = OBJECT ( tPrintSetupDlg)

      setupDlg :pPrintSetupDlg;


      CONSTRUCTOR
      init(iparent:PWindowsObject; name :PChar; idata :pPrintDlg; isetup :pPrintSetupDlg);

      DESTRUCTOR
      done;
        virtual;

      PROCEDURE
      preparePrinterData;
        virtual;

    END;

{****************************************************************}
IMPLEMENTATION


      CONSTRUCTOR
      tPrintSetupDlg.
      {}
      init(iparent:PWindowsObject; name :PChar; idata :pPrintDlg);
        begin
          tCommonDlg.init(iparent, name);
          printerData := iData;
        end;

      FUNCTION
      tPrintSetupDlg.
      {}
      printFlags :Longint;
        begin
          printFlags := 0
        end;

      PROCEDURE
      tPrintSetupDlg.
      {}
      preparePrinterData;
        begin
          with printerData^
          do begin
            lStructSize   := sizeof(printerData^);
            hInstance     := SYSTEM.HInstance;
            if parent <> nil
            then
              hwndOwner   := parent^.hWindow
            else
              hwndOwner   := 0;
            lpSetupTemplateName:= attr.Name;
            flags         := flags or pd_PrintSetup or printFlags;

            lCustData    := Longint(@Self);  {this does nothing, but could be usefull}

            move(Self.instance, lpfnPrintHook, sizeOf(lpfnPrintHook)); {this does the trick!}

            if (lpSetupTemplateName <> nil)
            then
              flags := flags or pd_EnableSetupTemplate;
            move(Self.instance, lpfnSetupHook, sizeOf(lpfnSetupHook));
            flags := flags or pd_EnableSetupHook
          end;
        end;


      FUNCTION
      tPrintSetupDlg.
      {}
      execute:Integer;
        var
          result :Integer;
          oldKBHandler :pWindowsObject;
        begin
          preparePrinterData;
          oldKbHandler := Application^.KBHandlerWnd;
          isModal      := TRUE;  { this is very important, object gets freed twice otherwise !}
          if COMMDLG.printDlg(printerData^)
          then
            execute := id_Ok
          else begin
            result := commDlgExtendedError;
            if result = 0
            then
              execute := id_Cancel
            else begin
              execute := -result;
              status  := em_InvalidWindow
            end;
          end;
          with printerData^
          do begin
            @lpfnSetupHook := nil;
            @lpfnPrintHook := nil;
            lpSetupTemplateName := nil;
            lpPrintTemplateName := nil;
            { clear flags used for dialog }
            flags := flags and not ( pd_EnableSetupTemplate or
                                     pd_EnablePrintTemplate or
                                     pd_EnableSetupHook     or
                                     pd_EnablePrintHook
                                     );
          end;
          hwindow := 0;
          isModal := FALSE;
          Application^.KBHandlerWnd := OldKbHandler;
        end;

      CONSTRUCTOR
      tPrintOptDlg.
      {}
      init(iparent:PWindowsObject; name :PChar; idata :pPrintDlg; isetup :pPrintSetupDlg);
        begin
          tPrintSetupDlg.init(iparent, name, iData);
          setupDlg  := isetup;
          if setupDlg <> nil
          then
            setupDlg^.printerData := printerData
        end;

      DESTRUCTOR
      tPrintOptDlg.
      {}
      done;
        begin
          if setupDlg <> nil
          then
            setupDlg^.free;
          tCommonDlg.done
        end;


      PROCEDURE
      tPrintOptDlg.
      {}
      preparePrinterData;
        begin
          tPrintSetupDlg.preparePrinterData;
          with printerData^
          do begin
            if setupDlg <> nil
            then
              setupDlg^.preparePrinterData;
            lpPrintTemplateName:= attr.Name;
            move(Self.instance, lpfnPrintHook, sizeOf(lpfnPrintHook));
            flags := flags and not pd_PrintSetup;

            if (lpPrintTemplateName <> nil)
            then
              flags := flags or pd_EnablePrintTemplate
          end

        end;

END.