[brailleblaster] Re: MDI
- From: François Ouellette <braille@xxxxxxx>
- To: brailleblaster@xxxxxxxxxxxxx
- Date: Sat, 28 Jul 2012 08:15:01 -0400
I re-visited the issues around the New, Open and Close and it seems we
can solve these problems if we re-work the way those functions are
implemented. As I reported earlier, right now doing a Close sometimes
does also an automatic New, sometimes closes the application, etc. I
can have another attempt at re-working these issues as there seems to
be hope to solve them without spending too much time. It would be sad
to disable the MDI feature if we can make it work with just a little
more work!
François.
On Fri, Jul 27, 2012 at 12:54 PM, John J. Boyer
<john.boyer@xxxxxxxxxxxxxxxxx> wrote:
> Hi Francois,
>
> Thanks for the information.
>
> Using multiple instances of Display in a single application is probably
> a bad idea. I wonder if we would run into problems with display
> instances if we were to start a new instance of BrailleBlaster within
> the application.
>
>
> I set up the original MDI framework, but I couldn't get it to work.
> Later Hanxiao refined it.
>
> As I said in my previous message, if starting a new instance of
> BrailleBlaster from within itself will work, that might be the better
> approach.
>
> John
>
> On Fri, Jul 27, 2012 at 11:01:59AM -0400, Fran�ois Ouellette wrote:
>> (warning: long post ahead!)
>> The whole concept of multiple documents does not seem to be well
>> implemented in BB at the moment. It seems that the same set of
>> variables is shared among the windows and because of that we lose
>> control of the events. I haven't changed anything to that part of the
>> code that deals with opening and managing windows. There are
>> discussions on the various blogs on the web regarding the use of
>> Display versus Shell objects in SWT. It seems that some features of
>> using multiple Displays are not supported on the Mac and I wonder if
>> things have been simplified in order to accommodate that. I don't know
>> who built the original model for the BB GUI, so it's difficult to
>> understand what the approach was supposed to be when all we have is
>> lots of java code without any embedded explication or comment.
>>
>> When opening new windows the document manager seems to keep some
>> document currency pointer but the display windows do not seem to have
>> their own threads, so data gets mixed up and shutdown events are
>> posted to all windows at the same time. Some other products like DBT
>> use a single frame inside which mulitple document panels get created,
>> but it can get confusing when trying to navigate between documents as
>> we have to bring them to the front in the same frame as all other
>> documents. Changing the structure of the current BB will not be a
>> simple task.
>>
>> My 2 cents.
>>
>> François.
>>
>> On Fri, Jul 27, 2012 at 9:56 AM, Vic Beckley <vic.beckley3@xxxxxxxxx> wrote:
>> > I'm not sure if you are aware of this, but the MDI isn't working correctly
>> > at all. Here are three major problem I have found so far.
>> >
>> > When you have multiple documents open closing one document closes all
>> > documents.
>> >
>> > If you have a document open with text and Braille, then loading a second
>> > document with text and Braille won't load the Braille.
>> >
>> > If you have several documents open and try to save one of the documents, BB
>> > saves the wrong document. I tried to save document 2. It presented me with
>> > the name of document 1. I thought it just was confused about the name so I
>> > changed it to the name of document 2 and saved it. When I brought up
>> > document 2 again it was actually the text of document 1.
>> >
>> >
>> > Best regards from Ohio, U.S.A.,
>> >
>> > Vic
>> > E-mail: vic.beckley3@xxxxxxxxx
>> >
>> >
>> >
>> >
>
> --
> 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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