[PyQt] Display of Japanese Characters on Mac

[Hans-Peter Jansen]

[Please keep the ML cc'ed _at_ _least_: <hint> I wouldn't mind just
 receiving the ML copy...]

On Thursday 16 December 2010, 21:32:56 Ullrich Martini wrote:
> Am 16.12.2010 um 20:30 schrieb Hans-Peter Jansen:
> > On Thursday 16 December 2010, 15:25:58 Ullrich Martini wrote:
> >> Hello,
> >>
> >> I cannot enter or view japanese characters on a Mac Running Snow
> >> Leopard with PyQt 4.8.1.
> >>
> >> Steps to reproduce the problem:
> >
> > -1) Install Qt (version?)
>
> It's 4.7.1, the latest release from qt.nokia.com

Fine.

> >> 0) I Installed python 2.7 from python.org and other prerequisites,
> >> like sip 1) Download PyQt 4.8.1
> >> 2) Run python configure.py install
> >> 3) Switch the Mac to hiragana input using the MacOS system widget
> >> 4) cd to PyQt-mac-gpl-4.8.1/examples/widgets
> >> 5) Run python lineedits.py
> >> 6) Try to write japanese text.
> >>
> >> Vowels do not appear at all. Consonants appear initially
> >> underlined, but disappear again when the following vowel is
> >> entered and the japanese input system tries to display the
> >> resulting japanese syllable.
> >>
> >> The context is that I am trying to port a vocabulary trainer based
> >> on python and PyQt to the Mac. This program allows to enter words
> >> in non-latin fonts, like japanese. This doesn't work. The
> >> symptomes are exactly the same as with lineedit.py.
> >>
> >> I assume this is a display issue, because japanese cards that have
> >> been entered before (using an earlier version of the program) are
> >> not displayed also, but if I look at the database directly the
> >> japanese words are displayed correctly.
> >>
> >> I described the issue with japanese hiragana. Displaying japanese
> >> kanjii does not work either, but the steps neccessary for
> >> reproducing this variant of the issue are much more complicated
> >> because entering kanjii characters directly is next to impossible
> >> because of the hiragana issue.
> >>
> >> Is this a known limitation? What would I have to do to allow
> >> japanese (and non-latin in general, I assume) input and display?
> >
> > First try to determine, if this is a Qt or PyQt issue.
> >
> > Fortunately almost all examples are available as a C++ variant (in
> > the Qt development version).
>
> Sure. I tried the lineedits example in /Developer/Examples/Qt/widgets
> and this works as expected.

Not so fine. 

Could you confirm the issue with the simplest possible script, please:

#!/usr/bin/env python
from PyQt4 import QtGui
app = QtGui.QApplication([])
win = QtGui.QTextEdit()
win.show()
app.exec_()

Pete