[nvda-addons] Re: a suggestion for eMule about the columns order
- From: Noelia <nrm1977@xxxxxxxxx>
- To: nvda-addons@xxxxxxxxxxxxx
- Date: Tue, 13 Aug 2013 07:15:41 +0200
Really great!
I hope all the conferences that I listen are with yours. Thanks.
I don't know how to write getOrderArray properly. I don't know how to
do that bad ordered objects (used for fake navigation) are shown as
they should.
I remember now that I collaborated on the ticket where support for
list columns wass added by using a plugin, and I gave a bad solution
about columns whos order had been changed on a list of a program, and
a developer named Peter fixed it properly. If you look into NVDA's
sources, you will see the name of that person in sysListView32. So
imo there is nothing that I can do here.
You can see the ticket about I'm talking, comments 27 and below:
http://community.nvda-project.org/ticket/828
Cheers.
2013/8/13, Alberto Buffolino <a.buffolino@xxxxxxxxx>:
> Hi all and particularly Noelia,
> in these days, I installed 1.0-dev version of eMule appModule, to see if
> there are changes about the columns order question. Apparently, no
> changes... then Chris explained to me the procedure with ctrl+shift+l,
> right click, and the activation of all headers. And ok, at that point
> all works... and you can repeat the procedure on another list. Boooring.
> But I could have a workaround, which would reduce drastically user
> interaction.
> Note: I tested the following only on XP.
> Starting from a list without all headers activated, from NVDA console, I
> noted that the strange order is reflected on _columnOrderArray variable
> of List class. In a normal list, in explorer for example, this variable
> is a c_long_Array_x, where x is the number of columns, and its content
> is, tipically, a serie of c_int 0, 1, 2, ..., x-1, so in this order.
> In eMule, the serie is more strange, 12, 13, 0, 1, 2, ..., ecc, for
> example.
> Now, I don't understand the entire process, but reading the sources, I
> realised that you can override the _get__columnOrderArray() method,
> which will provide a _columnOrderArray built ad hoc.
> So:
> -----
> from NVDAObjects.IAccessible.sysListView32 import List
> from ctypes import * # for c_int
>
> class AppModule(appModuleHandler.AppModule):
>
> def chooseNVDAObjectOverlayClasses(self, obj, clsList):
> if obj.role==controlTypes.ROLE_LIST:
> clsList.insert(0, FixedList)
>
> class FixedList(List):
>
> def _get__columnOrderArray(self):
> limit=super(FixedList, self).columnCount
> myCoa=(c_int *limit)()
> for n in range(0,limit):
> myCoa[n]=n
> return myCoa
> -----
> In reality, this works also with a normal Python list, so:
> myCoa=[n for n in range(0,limit)]
> but ok, it's a question of elegance, one line instead three.
> Now, if I understand correctly, this affects only NVDA vision, in other
> words, on screen eMule would show a different number of columns, and in
> other order. In theory, reading _get__columnOrderArray method in the
> sources, it would be possible to make equivalent screen and NVDA vision,
> forcing the list to assume a passed order using watchdog and
> LVM_SETCOLUMNORDERARRAY message (see the method source and the link
> below), and I successfully did in another program (Snarfer), but in this
> case it seems problematic, I don't understand the cause. Ah, this is the
> link, with all messages of List View:
> http://msdn.microsoft.com/en-gb/library/ms670560.aspx
> However, it must be said, NVDA does not support totally List View; I
> mean, the problem about to show also the deactivated/hidden columns is
> not a prerogative of only eMule. Working with watchdog and various
> messages of List View, it's probably possible to fix this and other
> problems, and (I suspect) to make NVDA capable to order, hide and
> manipulate lists as JAWS.
> Ok, end of the conference. :)
> I hope it's useful.
> Alberto
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