In manually labeling graphics, the short CRC's are usually sufficient to differentiate one graphic from another. I don't think GW is going to tell you how they calculate the CRC values, and my experience shows that there is no obvious meaning to any of the numbers. Sometimes you can infer something useful by the fact that several graphics have identical CRC values (perhaps all the unchecked boxes in a column). Try moving the mouse pointer by clip, get readings on the exact coordinates of graphics of interest with respect to the line they are associated with, and put your definitions in a graphic dictionary associated with the program that has focus, rather than making them global, because they might have different meanings in other programs.
How you use this information in writing scripts is not something I can help you with at the moment. Lloyd Rasmussen, Senior Project Engineer National Library Service for the Blind and Physically Handicapped Library of Congress 202-707-0535 http://www.loc.gov/nls The preceding opinions are my own and do not necessarily reflect those of the Library of Congress, NLS. -----Original Message----- From: RicksPlace [mailto:[email protected]] Sent: Tuesday, April 12, 2011 12:20 PM To: Rasmussen, Lloyd; [email protected] Subject: Re: What does CRC Stand For for Icon Thanks Doug: Perhaps I can find out more information about the images in question using their short or long crc values. Later: Rick USA ----- Original Message ----- From: "Doug Lee" <[email protected]> To: <[email protected]> Sent: Tuesday, April 12, 2011 10:13 AM Subject: Re: What does CRC Stand For for Icon > You indeed have the correct definition of CRC. It was originally used > to protect data transfers, such as by modem, from errors by providing > a way to detect them. Nowadays a CRC has many uses, including as a > sort of ID for graphics in screen readers. Other similarly used > values would include checksums (older than the CRC) and MD5 hashes > (also called digests, I believe). The point of them all is to > represent a larger amount of data by a smaller one, for purposes of > identifying or verifying the integrity of the larger one. > > On Tue, Apr 12, 2011 at 09:59:22AM -0400, RicksPlace wrote: > Hi: I read a icon under the mouse and get the short and long CRC Values > spoken > > I would like to know what the acronym "CRC" stands for- Googling it > comes up as "Cyclic Redundancy Check. A CRC is a type of check value > designed to catch most transmission errors." > > Is this the correct definition as used in the WE Docs for Images and > Icons when speaking the short and long CRC values, numpad insert up > arrow 2 or 3 times.? > > I also want to pick it up in my script to get a hard copy of the > diferent icon CRCs used in a particular window or WindowControl if > possible. > > I haven't found anything in the Scripting Manual yet that will let me > do that so far unless I missed it. > > Any ideas or pointers? > > Thanks: > > Rick USA > > -- > Doug Lee, Senior Accessibility Programmer SSB BART Group - > Accessibility-on-Demand mailto:[email protected] > http://www.ssbbartgroup.com "While they were saying among themselves > it cannot be done, it was done." --Helen Keller
