[jawsscripts] Re: Tracking a focus rectangle
- From: Doug Lee <doug.lee@xxxxxxxxxxxxxxxx>
- To: jawsscripts@xxxxxxxxxxxxx
- Date: Tue, 20 Nov 2012 00:05:49 -0500
Insert+5 won't help you identify the color of an area that does not
include a character. For that, you'll have to write a script that
tells you the result from the GetColorAtPoint function. Insert+5 calls
GetColorText() and GetColorBackground() and reports those two results.
Those functions only work with text. On a blank spot they both return
black.
On Mon, Nov 19, 2012 at 03:43:41PM -0500, Rizzino, Art wrote:
Revisiting an old topic.
I am working with a custom application that JAWS cursor can read text and
labeled graphics.
I am told that there is a rectangle around text indicating current choice, but
when I have a sighted person put the mouse on it JAWS tells me that the screen
colors are black on black. Actually anywhere you put the JAWS cursor the
colors are black on black.
Any ideas?
Thanks.
Art Rizzino
Assistive Technology Specialist
Blind and Vision Rehabilitation Services of Pittsburgh
?
-----Original Message-----
From: jawsscripts-bounce@xxxxxxxxxxxxx
[mailto:jawsscripts-bounce@xxxxxxxxxxxxx] On Behalf Of Doug Lee
Sent: Saturday, July 14, 2012 1:21 AM
To: jawsscripts@xxxxxxxxxxxxx
Subject: [jawsscripts] Re: Tracking a focus rectangle
I've had to do stuff like this occasionally, and yes, it's a challenge to keep
the code from being slow. A few ideas, assuming a simple custom highlight color
is not enough - and watch out, if using that, for empty rectangles, which will
not trigger anything based on a highlight color:
Figure out the minimum width and height of the rectangle you want, and the
smallest screen area in which it can ever reside. Also figure out the minimum
width of a detectable sign of the rectangle, usually its border. Use the second
of these to determine the screen area to scan, then write code to scan across
horizontal or vertical lines in that space, as far apart as dictated by the
answer to the first question, and only checking as many pixels as required
based on the answer to the third question. Once you find a rectangle edge,
either trace round it to find the others or repeat the same trick in the other
direction across your screen space. Of course if you find the four walls of
your rectangle you can mathematically determine the corner coordinates for it.
Finally, you can cache the last findings and write a quick "Is it still where
it was" checker, so the scans only occur when things are actively changing.
A lot of work, this can be, but this sort of thing can really make some
impossible-looking stuff just work.
On Fri, Jul 13, 2012 at 11:23:40PM -0500, Jim Snowbarger wrote:
The situation is sort of like a spreadsheet, but not in Excell, in a software
design tool. It's the entities on a diagram. As you operate the arrows, you
move focus to one entity or another, along prescribed paths. And, the way the
program indicates focus is by moving a box around that encloses an entity.
The box is, of course, indicated by alternating bands of color.
Jaws doesn't track that focus change, even though Track Focus Rectangle is
turned on. And, the focus object isn't moving around. And, I can't think of
any place where you can specify the definition of a focus rectangle.
So, I guess I'll have to search for it myself.
Anyway, for some reason I don't seem to have any code around where I did this,
even though I've certainly seen it before. So, I'm about to rewrite some
clever code to search for that box, and know I'll have a great time doing it,
even though if I were more orderly, I wouldn't have to. But, it will be a nice
little short brain teaser, though when I get it done, it's going to be a dog
of a performer. An old dog. So, is there a better way to approach this? You
guys know any tricks I might try? Or, something obvious I've overlooked?
Think twice, if it's really simple. Are you sure you wanna tell me? You know
you might be depriving a compulsive programmer of his kicks. <grin>
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