[brailleblaster] Re: How can I test whether a StyledText has changed?
- From: "John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx>
- To: brailleblaster@xxxxxxxxxxxxx
- Date: Fri, 10 Jun 2011 12:09:43 -0500
Thanks for the links. They will be very helpful. I've bookmarked all of
them.
John
On Fri, Jun 10, 2011 at 09:14:34AM -0700, Chris von See wrote:
> Here are some rough examples/explanations of how to implement undo/
> redo on an SWT StyledText control:
>
> http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/SWTUndoRedo.htm
> http://java-gui.info/Apress-The.Definitive.Guide.to.SWT.and.JFace/8886final/LiB0099.html
>
> (search for the word "undo"
>
> and a simple editor that implements undo/redo:
>
> http://www.java2s.com/Tutorial/Java/0280__SWT/Asimpleeditor.htm
>
>
> Cheers
> Chris
>
>
>
> On Jun 10, 2011, at 9:03 AM, John J. Boyer wrote:
>
> >Susan,
> >
> >Lots of information and good points. BrailleBlaster will have
> >algorithms
> >for making an xml or utd (Universal tactile document) file from the
> >two
> >views.
> >
> >The lack of undo in StyledText could be a problem. I am not sure how
> >it
> >could be added. I think we would have to copy the code and then modify
> >it. This would be a new BrailleBlaster class. I'm not sure what if any
> >problems there would be with doing this. We may have other reasons for
> >doing it, however. We might even contribute the new class back to
> >Eclipse.
> >
> >John
> >
> >On Fri, Jun 10, 2011 at 09:31:14AM -0600, Susan Jolly wrote:
> >>I'm not sure this is the right question to be asking at this point.
> >>Based
> >>on the discussion a few days ago, it seemed that you wanted to
> >>somehow
> >>associate the text that a StyledText widget edits to what Chris
> >>called the
> >>other day your "backing store."
> >>
> >>With its default use, StyledText makes a copy of your input and
> >>manages it
> >>with its default Content model. Any changes are made to this copy.
> >>You
> >>can, of course, obtain this possibly changed copy via getText() and
> >>do
> >>anything you want with it.(The SWT TextEditor example shows how to
> >>save it
> >>to a file.) However, the copy, changed or not, is obviously not
> >>connected
> >>to any "backing store." Styled Text also allows you to define your
> >>own
> >>Content model by using its setContent().
> >>
> >>You can add various Listeners including ModifyListener so the
> >>StyledText
> >>widget will inform you when it makes changes. StyledText doesn't
> >>support
> >>undo, although you could add it. Of course, if you do allow undo
> >>then you
> >>might want to add logic to see whether there are any net changes
> >>although
> >>this would probably be too hard. In my experience, most text
> >>editors think
> >>you've changed a document if you've done any editing even if in
> >>fact you've
> >>effectively undone all the changes.
> >>
> >>I've found two articles that are of some help in using the StyledText
> >>widget but it's definitely not easy to understand.
> >>http://www.eclipse.org/articles/StyledText%201/article1.html
> >>http://www.eclipse.org/articles/StyledText%202/article2.html
> >>
> >>HTH,
> >>Susan
> >>
> >>
> >>
> >>
> >
> >--
> >John J. Boyer; President, Chief Software Developer
> >Abilitiessoft, Inc.
> >http://www.abilitiessoft.com
> >Madison, Wisconsin USA
> >Developing software for people with disabilities
> >
> >
>
--
John J. Boyer; President, Chief Software Developer
Abilitiessoft, Inc.
http://www.abilitiessoft.com
Madison, Wisconsin USA
Developing software for people with disabilities
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