[Blindmath] First attempt at an SWT/SVG based drawing program

Tue Aug 30 21:47:32 UTC 2011

Pranav,

I seem to have lost your message regarding 64-bit incompatibility but I
think I have found a solution. It will take me several days to get a 64-bit
Java system up and running and to work out the details, but since you have a
64-bit system running, you could be very helpful by performing a couple of
tests and telling me the results.

Basically, I would like for you to download a set of 64-bit SWT DLL files,
replace the 32-bit DLL files in my jar file with the 64-bit files, and see
if that solves the problem.

You can download a zip file at
http://download.eclipse.org/eclipse/downloads/drops/R-3.7-201106131736/index.php#SWTthat
contains a complete 64-bit SWT library.

When you land on that page, search for "SWT Binary and Source"

Once you are in that section, search for "swt-3.7-win32-win32-x86_64.zip"

The download link for that zip file is labeled (http) and is about ten
characters to the left of the name of the zip file.

Or perhaps you could go directly to the following URL with is the download
page for that zip file.

http://download.eclipse.org/eclipse/downloads/drops/R-3.7-201106131736/download.php?dropFile=swt-3.7-win32-win32-x86_64.zip

Once you have the zip file, you should be able to open it using something
like WinZip and extract the DLL files.

Then you can open my jar file and replace the 32-bit DLL files with the
64-bit DLL files that you just extracted from the zip file.

Then you can try to run the jar file on the 64-bit system to see if that
solves the problem.

Please let me know.

Thanks,
Dick Baldwin

On Tue, Aug 30, 2011 at 1:45 PM, Richard Baldwin <baldwin at dickbaldwin.com>wrote:

> Lloyd - Thanks for the off-list feedback on the location of the output
> file. Here is the answer to your question for everyone to see:
>
> When you run from the jar file and specify the name of the output file, you
> must also provide a path such as the following:
>
> c:\jnk\6\testfile
>
> Otherwise, the output file ends up in an unidentified location. At least, I
> don't know where it would end up on your computer, which is configured
> differently from mine. Actually, it would probably be a good idea to always
> specify the path to the file to eliminate any possible confusion whether
> running from a jar file or running from a locally compiled version of the
> program.
>
> Thanks,
> Dick Baldwin
>
>
> On Tue, Aug 30, 2011 at 1:26 PM, Rasmussen, Lloyd <lras at loc.gov> wrote:
>
>> Replying off-list.
>>
>> Under Windows 7 32-bit, I ran the JAR file from the Downloads folder in my
>> user account (I have admin rights).  Using Window-Eyes 7.5.1.  I was able to
>> read the program and edit values.  I thought I created a drawing with two
>> line segments and a circle.  Saved the file under the name test1.  Pressing
>> Enter at the bottom item closed the program.  But I was unable to find a
>> test1.svg anywhere.  Where is it likely to be created?  In a temporary
>> directory which is destroyed when java.exe closes?
>>
>>
>> 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: blindmath-bounces at nfbnet.org [mailto:blindmath-bounces at nfbnet.org]
>> On Behalf Of Richard Baldwin
>> Sent: Monday, August 29, 2011 10:02 PM
>> To: BlindMath Mailing List
>> Subject: [Blindmath] First attempt at an SWT/SVG based drawing program
>>
>> For those who may be interested, I have posted my first attempt at putting
>> an SWT GUI front end on my SVG graphics library and have posted the
>> resulting program in a file named SVGDraw01.jar at the following URL:
>>
>>  http://www.austincc.edu/baldwin/SWT-SVG/SVGDraw01.jar
>>
>> I would appreciate it if some of you would download the program, try it,
>> and provide feedback in several different areas. You will need the Java
>> virtual machine installed on your computer to run the program. On Windows,
>> you can run the program either by double-clicking on the jar file, or by
>> opening a command prompt in the folder containing the jar file and entering
>> the following command at the command prompt:
>>
>> java -jar SVGDraw01.jar
>>
>> When the program starts running, you should find yourself in an SWT Combo
>> object with an item labeled "User Instructions" highlighted. Pressing the
>> Enter key at this point will take you to the beginning of a page containing
>> user instructions. A screen reader should tell you to press shift-tab to
>> return to the combo box or to press the tab key to continue.
>>
>> Pressing the tab key will cause the screen reader to begin reading the
>> instructions. At the end of the instructions, the screen reader should tell
>> you to "Press tab to return to the combo box." (Of course, you can press tab
>> at any time. You don't need to wait until the screen reader finishes reading
>> the instructions.)
>>
>> You can navigate up and down the list in the combo box using the arrow
>> keys and act on an item by pressing the Enter key when that item is
>> selected. The combo box currently contains the following items:
>>
>> User instructions (which is what you should do first) Start a new drawing
>> (which is what you should do next) Draw a line Draw a rectangle Draw a
>> circle Draw an ellipse Draw a polyline Draw a polygon Write drawing file
>> (which is what you should do next to last) Stop program (which is what you
>> should do last)
>>
>> When you press the Enter key on the item labeled "Start a new drawing," an
>> empty SVG page of a specified size with optional title and description
>> attributes will be created in memory.
>>
>> When you press the Enter key on the item labeled "Write drawing file",
>> that SVG page will be written to an output SVG file with a name of your
>> choosing and an extension of .svg.
>>
>> Between starting a new drawing and writing the drawing file, you can add
>> elements for any number of any of the six shapes (which are the SVG basic
>> shapes) in any order to the SVG page.
>>
>> When you press the Enter key on a shape item, you will land on a form that
>> allows you to enter the most commonly used attributes for that shape. Fill
>> in the blanks, check the check boxes (if any), and finally push the button
>> labeled "Push to draw ---" to add the shape element to the SVG page. You can
>> navigate up and down the the form with the tab key and shift-tab.
>>
>> I would appreciate receiving feedback in at least the following areas.
>> Feedback in other areas not listed below will be appreciated also.
>>
>> 1. Will the program be accessible to a blind student? What could be done
>> to improve accessibility?
>>
>> 2. Will the navigation structure of the program be functionally useful to
>> a blind student? What could be done to improve the navigational
>> functionality and make the program easier to use?
>>
>> 3. Will the "fill-in-the-blanks" concept for creating technical diagrams
>> and drawings, such as vector diagrams and free-body diagrams, be useful to a
>> blind student? If so, which of the many additional capabilities of SVG, such
>> as arcs, paths, etc., would be appropriate as an upgrade to the program.
>> (I'm already planning on adding the ability to create text elements. I
>> just haven't resolved all the questions regarding fonts yet.)
>>
>> 4. To what extent is the output SVG file compatible with graphics
>> embossers that can work with SVG files as input? What could be done to
>> improve that compatibility?
>>
>> Thank you,
>>
>> Dick Baldwin
>>
>> --
>> Richard G. Baldwin (Dick Baldwin)
>> Home of Baldwin's on-line Java Tutorials http://www.DickBaldwin.com
>>
>> Professor of Computer Information Technology Austin Community College
>> (512) 223-4758
>> mailto:Baldwin at DickBaldwin.com
>> http://www.austincc.edu/baldwin/
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>
>
>
> --
> Richard G. Baldwin (Dick Baldwin)
> Home of Baldwin's on-line Java Tutorials
> http://www.DickBaldwin.com
>
> Professor of Computer Information Technology
> Austin Community College
> (512) 223-4758
> mailto:Baldwin at DickBaldwin.com
> http://www.austincc.edu/baldwin/
>

-- 
Richard G. Baldwin (Dick Baldwin)
Home of Baldwin's on-line Java Tutorials
http://www.DickBaldwin.com

Professor of Computer Information Technology
Austin Community College
(512) 223-4758
mailto:Baldwin at DickBaldwin.com
http://www.austincc.edu/baldwin/