[brailleblaster] Re: How do I get this notifyListeners addListener to work?
- From: "John J. Boyer" <john.boyer@xxxxxxxxxxxxxxxxx>
- To: brailleblaster@xxxxxxxxxxxxx
- Date: Thu, 16 Jun 2011 10:58:57 -0500
What is the problem with sending a zip file? I just attach it to my
message, and it goes through.
John
On Thu, Jun 16, 2011 at 08:19:40AM -0700, Chris von See wrote:
> I've been trying off-list to send John a zip file containing all of
> the SWT stand-alone example source, but for some reason it's not
> coming through correctly...
>
> Attached is the source file for the SWT TextEditor example. It shows
> the use of listeners (as anonymous inner classes, I think) and
> includes a lot of functionality that may be useful in BrailleBlaster.
>
> John, I'll keep trying to send you the complete zip - I may need to
> use YouSendIt or similar...
>
>
> Cheers
> Chris
>
>
>
> On Jun 15, 2011, at 7:43 PM, John J. Boyer wrote:
>
> >Chris,
> >
> >What I am doing is setting up a Milti-document Inteface (MDI)
> >framework.
> >This is something that will be wanted eventually, and I am quite sure
> >that the it will be easier if the framework is present early on. It
> >doesn't seem like it should be diffiecult. The WPManager keeps a
> >list of
> >active documents, which are embodied in instances of DocumentManager.
> >The user can move amonng the doucuments, as in any word processor. The
> >request for another document will come from an item in BBMenu, which
> >is
> >a chile of the active DocumentManager. The new document should not
> >itself be a child of this DocumentManager. it should be a child of
> >WPManager. So It seemed to me that the ntural way to do this would
> >be to
> >send on OpenDocument event, which woudl be caught by an OpenDocument
> >listener in WPManager. Is this your understanding? Are you trying to
> >make things easier for me at this point? That will probably produce
> >much
> >more difficulty down the road. In any case, I need to master the
> >event-listener technique.
> >
> >I've never been able to get much out of the swt examples page, even in
> >IE. Instead of just giving links to the examples they want me to go to
> >the downloads page and then find the examples. I must confess that I'm
> >really bad at finding anything on the Web.
> >
> >Another thing I would like to find is a zip file like those for SWT,
> >for
> >Jface, which contains both source code and a jar.
> >
> >I don't want to give the impression of being a complainer, but it
> >seems
> >to me that the Eclipse sites are downright unfriendly. What are they
> >thinking of?
> >
> >John
> >
> >On Wed, Jun 15, 2011 at 07:04:20PM -0700, Chris von See wrote:
> >>If I understand what you're doing correctly, you seem to be making
> >>this more complicated than it needs to be. You may want to take a
> >>look at the SWT example code available from
> >>http://www.eclipse.org/swt/examples.php - there are some pretty nice
> >>non-Eclipse demo programs there that can help you decide how best to
> >>structure the application.
> >>
> >>
> >>Cheers,
> >>Chris
> >>
> >>
> >>On Jun 15, 2011, at 5:33 PM, John J. Boyer wrote:
> >>
> >>>Yes, I have SelectionListeners on all menu items. When the Opeen,
> >>>New or
> >>>Import item is selected the listener calls the sendOpenEvent
> >>>method in
> >>>the DocumentManager, with an int parameter specifyingthe action to
> >>>be
> >>>taken. This method creates an instance of Event and places the
> >>>parameter
> >>>in the detail field. It then calls notifyListeners on the
> >>>DocumentManager's Shell with SWT.OpenDocument and the event.
> >>>
> >>>When it started, WPManager used addListener on the Display, which is
> >>>the
> >>>only SWT class it has, to add a listener for the OpenDocument event.
> >>>The
> >>>handleEvent method in this listener calls the addDocument method in
> >>>the
> >>>WPManager. This creates a new instance of DocumentManager and adds
> >>>it to
> >>>the ArrayList of active documents. However, this never happens.
> >>>
> >>>It is not necessary to generate an event for the Close menu
> >>>selection,
> >>>since this process occurs entirely withing the DocumentManager. The
> >>>listener merely sets an exitSelected boolean to true. The normal
> >>>event
> >>>loop also tests the value of this boolean, and if it is true the
> >>>DocumentManager does what is necessary to close the document and
> >>>exits.
> >>>The addDocument method in the WPManager, which created this instance
> >>>of
> >>>DocumentManager then sets its reference in the list of active
> >>>documents
> >>>to null, so the garbage collector can dispose of it, and then
> >>>removes
> >>>the reference from the list of active documents.
> >>>
> >>>John
> >>>
> >>>dreats
> >>>an instan
> >>>On Wed, Jun 15, 2011 at 04:05:56PM -0700, Chris von See wrote:
> >>>>I'm not sure I completely understand what you did, but what I've
> >>>>done
> >>>>in the past is add a SelectionListener to the "Open..." menu item.
> >>>>The listener gets called when the user selects that menu item; you
> >>>>can
> >>>>then create and open a file dialog to allow the user to select the
> >>>>file and create your XOM tree, views, etc. You can also use a
> >>>>SelectionListener on a "Close" menu item to close the active
> >>>>document
> >>>>and free resources.
> >>>>
> >>>>Cheers
> >>>>Chris
> >>>>
> >>>>
> >>>>
> >>>>On Jun 15, 2011, at 3:47 PM, John J. Boyer wrote:
> >>>>
> >>>>>In the design for the word processor that I have come up with,
> >>>>>it is
> >>>>>entered by a call to WPManager from somewhere, the main mehtod
> >>>>>now.
> >>>>>WPManager creates an instance of DocumentManager which creates
> >>>>>instances
> >>>>>of BrailleView, SaisyView, BBMenu BBToolbar and BstatusBar.
> >>>>>DocumentManager handles everything relating to a single document.
> >>>>>When
> >>>>>the user choses the Open, New or Import items on the menu it calls
> >>>>>notifyListeners on its Shell. WPmanager has previously
> >>>>>registered a
> >>>>>listener for the IpenDocument event on the display. The listener
> >>>>>is
> >>>>>supposed to call a method which creates a new document and adds it
> >>>>>to an
> >>>>>ArrayList of documents. However, the listener never hears
> >>>>>anything.
> >>>>>What
> >>>>>is wrong?
> >>>>>
> >>>>>Thanks,
> >>>>>John
> >>>>>
> >>>>>--
> >>>>>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
> >>>
> >>>
> >>
> >
> >--
> >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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