Developer CD Series 1996 May: Tool Chest/Developer CD Series May 1996 (Tool Chest) (Apple Computer) (1996).iso/Sample Code/Snippets/Printing/Print multipage PICT/print.p

Text File | 1994-02-24 | 9.5 KB | 307 lines | [TEXT/PJMM]

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{    This file has been processed by The THINK Pascal Source Converter, v1.1.2.    }
unit PrintStuff;                                     { printing unit based on Luke's caring print loop }

interface
uses
    PrintTraps;

function Print (thePrRecHdl: THPrint): boolean;
function PageSetup (thePrRecHdl: THPrint): boolean;

implementation

type

    heightAndWidth = record
            height: integer;
            width: integer;
        end;
var
    theStatus: TPrStatus;
    pageDims: heightAndWidth;
    documentPicture: PicHandle;


procedure AlertUser (rTheAlert: integer);
EXTERNAL;

function GetPages (theDocBounds: Rect; thePrintRecord: THPrint): heightAndWidth;
    var
        pageLength, docLength, height, width: integer;

{ Note that we'll use these "length" variables twice -- once for the width, and once for the height. }
{ They're just one-dimensional, so why use stack space to declare two copies? }

    begin
        with theDocBounds do
            docLength := right - left;
        with thePrintRecord^^.prInfo.rPage do
            pageLength := right - left;

        width := docLength div pageLength;
        if docLength mod pageLength <> 0 then
            width := width + 1;

        with theDocBounds do
            docLength := bottom - top;
        with thePrintRecord^^.prInfo.rPage do
            pageLength := bottom - top;

        height := docLength div pageLength;
        if docLength mod pageLength <> 0 then
            height := height + 1;

        GetPages.width := width;
        GetPages.height := height;

    end;

procedure UnLoadTheWorld;  {Nothing here right now for segmentation}

{    UnLoadTheWorld will swap out ALL unneeded code segments and data that are NOT required during print time.}
{Your print code must be a separate code segment.  }

    begin
    end;

function DetermineRealNumberOfPagesInDoc (documentSize: Rect; printRecord: THPrint): integer;

    begin
        pageDims := GetPages(documentSize, printRecord);
        DetermineRealNumberOfPagesInDoc := pageDims.height * pageDims.width;
        ;
    end;


procedure DrawStuff (thePage: rect; thePort: GrafPtr; pageNumber: integer; thePicture: PicHandle);

    var
        printingRect: Rect;
        offsetPage: Rect;

    begin

{ We draw pages horizontally first, then vertically, so if there are four pages, page 2 is to the right of page 1. }

{ First, get the offset rectangle for the page we're drawing }

        offsetPage := thePicture^^.picFrame;
        OffsetRect(offsetPage, -((pageNumber - 1) mod pageDims.width) * (thePage.right - thePage.left), -((pageNumber - 1) div pageDims.width) * (thePage.bottom - thePage.top));
        DrawPicture(thePicture, offsetPage);

    end;

procedure MyPIdleProcedure;
    var
        pIdleEventRecord: EventRecord;
    begin
        if GetNextEvent(keyDownMask, pIdleEventRecord) then
            begin
                if ((BitAnd(pIdleEventRecord.message, charCodeMask) = longint('.')) and (BitAnd(longint(pIdleEventRecord.modifiers), cmdKey) = cmdKey)) then
                    PrSetError(iPrAbort);
            end;
    end;


function PageSetup (thePrRecHdl: THPrint): boolean;

    var
        PrintError: LongInt;
        oldPort: GrafPtr;
        printmgrsResFile: integer;

    begin
        GetPort(oldPort);
        printmgrsResFile := CurResFile;
        if thePrRecHdl <> nil then
            begin
                PrOpen;
                if (PrError = noErr) then
                    begin
                        if (PrError = noErr) then
                            begin
                                if (PrStlDialog(thePrRecHdl)) then
                { Do any post-processing on the style dialog results you need to here }
                                else
                                    PrSetError(iPrAbort);   {**  Cancel from the style dialog  **}
                            end;
                    end;
                PrintError := PrError;

                PrClose;

                                            {**}
{                                            You do not want to report any printing errors}
{                                            until you}
{                                            have fallen through the printing loop . This will make sure that ALL of the Print Manager 's open calls have their corresponding close calls, thereby}
{                                            enabling the Print Manager to close properly and that all temporary memory allocations are released . * *}

                if (PrintError <> noErr) and (PrintError <> iPrAbort) then
 { PostPrintingErrors(PrintError); Need to add this }
            end;

        UseResFile(printmgrsResFile);
        SetPort(oldPort);

    end; {PageSetup}

function Print (thePrRecHdl: THPrint): boolean;

    var
        copies, firstPage, lastPage, loop, numberOfCopies, pageNumber, printmgrsResFile, dummyFlags, realNumberOfPagesInDoc: Integer;
        PrintError: LongInt;
        oldPort: GrafPtr;
        thePrPort: TPPrPort;
{theStatus: TPrStatus;}
        PrintingStatusDialog: DialogPtr;
        documentBounds: Rect;

    begin
        GetPort(oldPort);
        PrintingStatusDialog := nil;

    {**}
        UnLoadTheWorld;

        if (MemError = noErr) and (thePrRecHdl <> nil) then
            begin
                PrOpen;
                if (PrError = noErr) then
                    begin

{                    Save the current resource file ( i . e . the printer driver's) so the driver will not lose its resources}
{                    upon return from the pIdleProc.  }

                        printmgrsResFile := CurResFile;

                        if (PrError = noErr) then
                            begin
                                    {**}
{                                    DetermineNumberOfPagesinDoc determines the number of pages contained in the document by comparing the size of the document}
{                                    with rPage from the TPrInfo}
{                                    record}
{                                            ( IM II - 150 ) . It returns the number of pages required to print the document}
{                                            for the currently selected printer . * *}

                                documentPicture := GetPicture(256);
                                documentBounds := documentPicture^^.picFrame;
                                realNumberOfPagesinDoc := DetermineRealNumberOfPagesinDoc(documentBounds, thePrRecHdl);
                                ;

                                if PrJobDialog(thePrRecHdl) then
                                    begin

{                                                  Get the number of copies of the document that the user wants printed from iCopies of the TPrJob }
{                                                    record}
{                                                            ( IM II - 151 ) . * *}

                                        numberOfCopies := thePrRecHdl^^.prJob.iCopies;

{                                                            Get the first and last pages of the document that were requested to be printed by the user from iFstPage and iLastPage from the TPrJob}
{                                                            record}
{                                                                    ( IM II - 151 ) . * *}

                                        firstPage := thePrRecHdl^^.prJob.iFstPage;
                                        lastPage := thePrRecHdl^^.prJob.iLstPage;

{                                                                    Print "}
{                                                                    all "}
{                                                                    pages in the print loop * *}

                                        thePrRecHdl^^.prJob.iFstPage := 1;
                                        thePrRecHdl^^.prJob.iLstPage := 9999;

{                                                                    Determine the "}
{                                                                    real "}
{                                                                    number of pages contained in the document . Without this test , you would print 9999 pages . * *}

                                        if (realNumberOfPagesinDoc < lastPage) then
                                            lastPage := realNumberOfPagesinDoc;

                                        PrintingStatusDialog := GetNewDialog(257, nil, POINTER(-1));

                                                                    {**}
{                                                                    Print the number of copies of the document requested by the user from the Print Job Dialog . * *}

                                        for copies := 1 to numberOfCopies do
                                            begin

                                                                            {**}
{                                                                            Install a pointer to your pIdle proc in my print}
{                                                                            record}
{                                                                                    . * *}
                                                thePrRecHdl^^.prJob.pIdleProc := @MyPIdleProcedure;

                                                                                    {**}
{                                                                                    Restore the resource}
{                                                                                    file to the printer driver 's.}
{                                                                                    * *}
                                                UseResFile(printmgrsResFile);

                                                thePrPort := PrOpenDoc(thePrRecHdl, nil, nil);

                                                SetPort(GrafPtr(thePrPort));

                                                if (PrError = noErr) then
                                                    begin
                                                                                            {**}
{                                                                                            Print the range of pages of the document requested by the user from the Print Job Dialog . * *}
                                                        pageNumber := firstPage;
                                                        while ((pageNumber <= lastPage) and (PrError = noErr)) do
                                                            begin

                                                                PrOpenPage(thePrPort, nil);

                                                                if (PrError = noErr) then
                                                                    begin
                                                                                                            {**}
{                                                                                                            rPage ( IM II - 150 ) is the printable area}
{                                                                                                            for the currently selected printer . By passing the current enables your app to use the same routine to draw to the screen and the printer 's GrafPort.}
{                                                                                                            * *}

                                                                        DrawStuff(thePrRecHdl^^.prInfo.rPage, GrafPtr(thePrPort), pageNumber, documentPicture);
                                                                    end;
                                                                PrClosePage(thePrPort);
                                                                pageNumber := pageNumber + 1;
                                                            end;  {**  End pagenumber loop  **}
                                                    end;
                                                PrCloseDoc(thePrPort);
                                            end; {**  End copies loop  **}

                                                                            {**}
{                                                                            The printing job is being canceled by the request of the user from the Print Style Dialog or the Print Job Dialog . PrError will be}
{                                                                            set to iPrAbort to tell the Print Manager to abort the current printing job . * *}
                                    end
                                else
                                    PrSetError(iPrAbort);   {**  Cancel from the job dialog  **}
                            end;
                    end;
                if (thePrRecHdl^^.prJob.bJDocLoop = bSpoolLoop) and (PrError = noErr) then
                    PrPicFile(thePrRecHdl, nil, nil, nil, theStatus);

                                            {**}
{                                            Grab the printing error before you close the Print Manager and the error disappears . * *}

                PrintError := PrError;

                PrClose;

                                            {**}
{                                            You do not want to report any printing errors}
{                                            until you}
{                                            have fallen through the printing loop . This will make sure that ALL of the Print Manager 's open calls have their corresponding close calls, thereby}
{                                            enabling the Print Manager to close properly and that all temporary memory allocations are released . * *}

                if (PrintError <> noErr) then
 { PostPrintingErrors(PrintError); Need to add this }

            end;

        if (PrintingStatusDialog <> nil) then
            DisposDialog(PrintingStatusDialog);

        SetPort(oldPort);
    end;  {**  print stuff  **}
end.