PyQT: qt.qApp

[Axel Mittendorf]

Hello,
in my application I want to subclass qt.QApplication and
use this subclass instead of QApplication for my gui. Some
of my modules are automatically generated by pyuic and
I am not allowed to change their source code. The problem
is these modules do "from qt import *" and use an object
called 'qApp' which seems to be an instance of qt.QApplication
and I want them to use my subclass (exactly its instance)
instead of 'qApp'. How can I solve this?

Can someone tell me what qt.qApp is and what it is used for?
(I'm using PyQT 3.6.)

TIA,
Axel

 

[John J. Lee]

in my application I want to subclass qt.QApplication and
use this subclass instead of QApplication for my gui. Some
of my modules are automatically generated by pyuic and
I am not allowed to change their source code. The problem
is these modules do "from qt import *" and use an object
called 'qApp' which seems to be an instance of qt.QApplication

IIRC, qApp is *the* QApplication (there's only one QApplication
instance per application).

and I want them to use my subclass (exactly its instance)
instead of 'qApp'. How can I solve this?

I have a vague recollection that you can't, due to an obscure
limitation of either Qt or PyQt (or sip, maybe). That might have
changed by now, though: ask on the PyKDE list.

Can someone tell me what qt.qApp is and what it is used for?
(I'm using PyQT 3.6.)

See above.


John

 

[Roberto Alsina]

Hello,
in my application I want to subclass qt.QApplication and
use this subclass instead of QApplication for my gui. Some
of my modules are automatically generated by pyuic and
I am not allowed to change their source code. The problem
is these modules do "from qt import *" and use an object
called 'qApp' which seems to be an instance of qt.QApplication
and I want them to use my subclass (exactly its instance)
instead of 'qApp'. How can I solve this?

Can someone tell me what qt.qApp is and what it is used for?
(I'm using PyQT 3.6.)

Well, there are some times when you need to call a method of
QApplication.

For example, if you want to put a hourglass cursor for the whole app,
you call
qApp.setOverrideCursor

Anyway, you shouldn´t worry about this. Whatever object you create
that inherits QApplication will be qApp. Since there can only be one
of those, there is no way it´s gonna get confused ;-)