ImageEn Forum

Profile Join Active Topics Forum FAQ

All Forums

ImageEn Library for Delphi, C++ and .Net

ImageEn and IEvolution Support Forum

Bug in ImageAcquisition\WIAScanner?

Note: You must be registered in order to post a reply.
To register, click here. Registration is FREE!

View

UserName:

Password:

Format

Message

Emoji

Check here to include your profile signature.
Check here to subscribe to this topic.

T O P I C R E V I E W
JonRobertson	Posted - Oct 27 2011 : 14:24:27 I'm considering adding support for WIA to our application. I am using the demo at ImageAcquitision\WIAScanner to test against one of the most common scanners used by our customers, a DocketPort 687. This is a duplex A6 scanner, used by our customers to scan drivers licenses and insurance cards. The Scanner Info tab for this scanner was not making sense. Capabilities were not present that I expected. After looking closer at the code and help file, I'm fairly sure there is a bug on line 326: temp := GetDeviceProperty(WIA_DPS_SHEET_FEEDER_REGISTRATION); //!!! Shouldn't this be WIA_DPS_DOCUMENT_HANDLING_CAPABILITIES ??? CheckBox3.Checked := (temp and WIA_FEED) <> 0; // readonly CheckBox4.Checked := (temp and WIA_FLAT) <> 0; // readonly CheckBox5.Checked := (temp and WIA_DUP) <> 0; // readonly CheckBox6.Checked := (temp and WIA_DETECT_FLAT) <> 0; // readonly CheckBox7.Checked := (temp and WIA_DETECT_SCAN) <> 0; // readonly CheckBox8.Checked := (temp and WIA_DETECT_FEED) <> 0; // readonly CheckBox9.Checked := (temp and WIA_DETECT_DUP) <> 0; // readonly CheckBox10.Checked := (temp and WIA_DETECT_FEED_AVAIL) <> 0; // readonly CheckBox11.Checked := (temp and WIA_DETECT_DUP_AVAIL) <> 0; // readonly Edit35.Text := GetDeviceProperty(WIA_DPS_DOCUMENT_HANDLING_CAPACITY); // readonly
3 L A T E S T R E P L I E S (Newest First)
fab	Posted - Oct 29 2011 : 04:40:03 Yes, in WIAScanner WIA_DPS_DOCUMENT_HANDLING_CAPABILITIES must replace WIA_DPS_SHEET_FEEDER_REGISTRATION and in Multiview then Acquire must be checked. Thank you helping us to make demos better.
xequte	Posted - Oct 28 2011 : 11:49:07 Hi Jon Thanks for reporting these two issues. We will investigate further. Nigel Xequte Software www.xequte.com nigel@xequte.com
JonRobertson	Posted - Oct 27 2011 : 15:42:40 Note I also found a bug in Multi\Multiview. If the user cancels the WIA acquire dialog, an Access Violation occurs. After cancelling the dialog, Acquire is still called, which shouldn't be since I wanted to cancel the scan request. I changed the code in Acquirepages1Click to only call Acquire if ShowAcquireDialog returns True: if ImageEnMView1.MIO.WIAParams.ShowAcquireDialog(false) then // show the scanner dialog (Remove if you don't want it) ImageEnMView1.MIO.Acquire(ieaWIA);