[immodule-qt] QSimpleInputContext is now available

[Lars Knoll]

On Wednesday 28 July 2004 18:42, Kazuki Ohta wrote:
> Hi, Lars.
>
> > On Friday 23 July 2004 00:42, Kazuki Ohta wrote:
> > > I've committed QSimpleInputContext which is table based InputContext
> > > for supporting Dead/Multi key. (r31)
> > > But the table is not complete yet(only dead key related stroke is
> > > registered), so I'm going to add entries for Multi key.
> > >
> > > see :
> > > http://freedesktop.org:8080/svn/immqt/immodule-qt-x11/trunk/src/input/q
> > >si mp leinputcontext.cpp
> >
> > One idea: Instead of using a hardcoded lookup table, to compose the
> > sequence into Unicode, you might want to use QString::compose() in Qt 3,
> > and QUnicodeTables::ligature(ushort c1, ushort c2) in Qt 4.
> >
> > Best regards,
> > Lars
>
> I try to use QString::compose, but it has some problem.
>
> First, we cannot confirm if composition occurs or not, therefore cannot
> detect the end of composition.
> That is, we cannot decide what timing we should commit the String.

As far as I know, a dead key works only on the next following character, so 
you know that there are at most 2 characters taking part.

> Next, QString::compose seem not to be able to handle Multi key (Example
> code is attached).

No it can't. For multi keys you need a lookup table.

> Anyway, QSimpleInputContext must have hardcoded look up table.
>
> #for future, we should load X's composing table dynamically (Yamaken
> suggest this to me)

I don't think this will work. X's composing table is most certainly not 
exported from Xlib. And if it is, it's an external symbol one should not rely 
on.

Best regards,
Lars