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Date Posted: 22:55:37 04/04/02 Thu
Author: Brian Lowe
Subject: Re: Endless scanning
In reply to: Michel 's message, "Re: Endless scanning" on 07:15:29 04/01/02 Mon

Hi Michel,

>It seems that the driver is not indicating when all
>images have been scanned. On a multi page scan,
>PendingXFers should be 0 when all pages are scanned.
>
>Some drivers allow transferring images even if the
>scanner is not connected. Do you know if this driver
>allows this?

It is a copy/scan/print multi-function and the copy function is a scan-to-printer. I don't know anything about the driver w.r.t. image transfer.

>
>Does the scanners dialog box close automatically after
>scanning the images? I seem to recall a scanner that
>required the dialog box to be closed manually to
>terminate the scanning.

It has a "Close" button yet closes automatically when driven from Pagis, the software that came with it.

>
>Yes, if you don't mind, I would like to have a look at
>your improved rubber banding.

Sent via separate e-mail.

Brian


>>Hi Michel,
>>
>>GetAllImages is identical in my current version and in
>>v2. It happens outside the IDE using Xerox WorkCentre
>>950 twain interface.
>>
>>After the initial (successful) scan, the call in
>>ConcludeTransfer to
>>{ acknowledge end of transfer }
>>CallTriplet( pSourceId, pAppId,
>> DG_CONTROL, DAT_PENDINGXFERS,
>> MSG_ENDXFER, @PendingXfers, @TwainResult,
>>DsmEntry);
>>
>>does not change the value of PendingXfers (= 341
>>before and after this call).
>>
>>Any suggestions?
>>
>>Also, I have a much improved (IMHO) rubber band
>>selection unit. Would you like me to send it?
>>
>>Thanks,
>>Brian
>>
>>>
>>>Hi Brian,
>>>
>>>Compare your current EnTwain unit with the one from
>>>version 2. The "if not PendingTransfers then"
>>>statement should stop the loop.
>>>
>>>I think I recall seeing some twain interfaces, where
>>>you need to close the interface after scanning to
>>>return to the application.
>>>
>>>Also, make sure you test this when running your
>>>program outside the IDE. I have seen strange results
>>>scanning within the debugger.
>>>
>>>Best regards,
>>>
>>>Michel
>>>
>>>
>>>>My EnTwain unit loops for ever and has the following
>>>>code in GetAllImages. Did you ever fix this problem?
>>>>
>>>>ConcludeTransfer( PendingTransfers, pSourceId,
>>pAppId,
>>>> DsmEntry );
>>>>
>>>>{ MB July 31, 1999. Twain message loop not
>>terminating
>>>>properly }
>>>>if not PendingTransfers then
>>>> TwainQuit := True;
>>>>
>>>>Brian Lowe
>>>>Belleson Corp.

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