Hello List,
I recently upgraded to PyQt 4.7 (on windows) and my application now hangs up
about once per hour. I have been trying to use GDB and the debuggers in
Visual Studio and Qt Creator to attach to my hung process and determine
where the problem is, but I don't have any debugging symbols for t
Howdy,
Can anyone tell me how to get debugging symbols for the pyqt windows
binaries? I have a few crashes occurring somewhere in QtCore, and so far my
current strategy of "hope the bug exists in Linux too" is not working. My
searches have turned up very little..
Luke
I believe I have run into a class of bugs in PyQt4. I originally found that
QSpinBox.lineEdit() returns a QLineEdit instance which does not maintain its
reference count properly after the original QSpinBox is deleted. Thus it is
possible to either 1) have uncollectable LineEdits lingering in memory
On Thu, Aug 5, 2010 at 03:43, Phil Thompson wrote:
> On Thu, 5 Aug 2010 03:10:50 -0400, Luke Campagnola
>
> wrote:
> > I believe I have run into a class of bugs in PyQt4. I originally found
> that
> > QSpinBox.lineEdit() returns a QLineEdit instance which does not mainta
On Fri, Aug 6, 2010 at 10:53, Mailing List SVR wrote:
> Il giorno gio, 05/08/2010 alle 03.10 -0400, Luke Campagnola ha scritto:
> > $ python
> > >>> from PyQt4.QtGui import *
> > >>> a = QApplication([])
> > >>> s = QSpinBox()
Greetings All-Knowing PyQters,
I have a strange bug that's causing segmentation faults in my program. I
have identified some of the key contributors to the bug and a workaround,
but I would love for someone to explain what causes the crash so I can avoid
similar problems in the future.
Here are th
Hello,
I have a multi-threaded application that locks up periodically while drawing
graphics. The application is quite large and due to the randomness of the
lockup (usually takes between 10 minutes and 10 hours), I have not been able
to work out the exact cause. I do believe that all GUI calls ar
On Sat, Apr 16, 2011 at 04:22, Phil Thompson
wrote:
> On Fri, 15 Apr 2011 23:45:15 -0400, Luke Campagnola
> wrote:
>> Hello,
>>
>> I have a multi-threaded application that locks up periodically while
>> drawing
>> graphics. The application is quite larg
Howdy,
I have just compiled PyQt 4.8.4 in WinXP using MinGW from the Qt SDK. I
configured both sip and PyQt with --debug turned on (but had to modify the
makefiles to link against python26 instead of python26_d). My problem right
now is that these did not produce importable modules (for instance, I
If you do want to use threading, then I agree with your approach and
Emmanuel's suggestions. However, you do not need to use threading at all for
this task (in my opinion, you should always avoid using threads if
possible).
My approach would be:
1) use subprocess.Popen to execute the command
2) us
Hello,
I have the same issue as described below and copying qt.conf into
c:\python27 solved the problem. This is from a fresh windows install
using the 4.8.4 binary installer. Is there some reason this file isn't
being copied to its correct location?
Luke
On Thu, Oct 23, 2008 at 12:16, Phil Thomp
Howdy Phil,
I'm running into this issue where QGraphicsScene.items() does not
return the correct python objects if the items are subclassed from
QGraphicsObject. Your response to this issue several months ago was:
On Fri, May 20, 2011 at 11:46, Phil Thompson
wrote:
> It's because QGraphicsObject
tches:", obj is items[0]
On Mon, Dec 5, 2011 at 16:33, Phil Thompson wrote:
> On Mon, 5 Dec 2011 12:24:57 -0500, Luke Campagnola
>
> wrote:
>> Howdy Phil,
>> I'm running into this issue where QGraphicsScene.items() does not
>> return the cor
Great,
Thanks Phil!
On Wed, Dec 7, 2011 at 07:56, Phil Thompson wrote:
> On Mon, 5 Dec 2011 18:01:25 -0500, Luke Campagnola
>
> wrote:
>> How about this:
>>
>> from PyQt4 import QtCore, QtGui
>> import sip
>> class GObject(QtGui.QGraphicsObject):
>>
Howdy list,
I'm trying to achieve some sort of multiple inheritance with custom classes
where each may define its own signals. I understand there are limitations
with SIP in this area, but It is not really necessary that QObject be
inherited more than once. As an example, consider the standard dia
On Sat, Apr 14, 2012 at 09:12, Phil Thompson wrote:
> On Sun, 8 Apr 2012 22:40:04 -0400, Luke Campagnola
>
> wrote:
> >As an example, consider the standard diamond
> > inheritance problem:
> >
> >A
> > /\
> > BC
> > \/
&
Howdy,
I am trying to use multiprocessing in a PyQt application to spawn an extra
process with its own GUI. The problem I am running into is that the child
process seems to be instantiated with a broken QApplication instance that
causes the child to crash. If I understand multiprocessing correctly
Thanks, Kovid!
I had no idea multiprocessing uses fork(); this explains everything. It
also seems there is no way to get rid of the copied QApplication after
forking.
There is a patch to allow forkless-multiprocessing on unix, but I think it
might be for python 3 only.
On Mon, Jun 11, 2012 at 1:15
On Wed, Jun 13, 2012 at 7:53 AM, Kovid Goyal wrote:
> On Mon, Jun 11, 2012 at 01:59:35PM -0400, Luke Campagnola wrote:
>> I agree with you about the multiprocessing package--I really only use it
>> for the ease of passing python objects between processes. (I use
>> multiproce
Hello again,
I am trying to implement a subclass of QGraphicsView that allows the
user to pan its contents by dragging with the middle mouse button and
scale by dragging with the right button. for various reasons, I do not
wish to use the built-in pan and zoom features in QGraphicsView. I
have read
And of course I forgot to attach the script.
On Thu, May 29, 2008 at 1:21 AM, Luke Campagnola <[EMAIL PROTECTED]> wrote:
> Hello again,
> I am trying to implement a subclass of QGraphicsView that allows the
> user to pan its contents by dragging with the middle mouse button
Hello again,
I am trying to implement a subclass of QGraphicsView that allows the
user to pan its contents by dragging with the middle mouse button and
scale by dragging with the right button. for various reasons, I do not
wish to use the built-in pan and zoom features in QGraphicsView. I
have read
Howdy,
I have found that somewhere between 4.8.3 and 4.9.6, calling
QTreeWidgetItem.addChild(item) no longer creates a reference to the
specified item (or, at least that is my best guess as to what's going on).
I noticed this because I often assign custom attributes to these items and
found that th
Hello,
It appears that the API for QImage.__init__ changed somewhere between 4.9
and 4.10.
In 4.9, I use QImage(int, width, height, format) and in 4.10 I use
QImage(sip.voidptr, width, height, format). I would like to include both
calls in my code; can you tell me at what version did this change t
Howdy,
I am getting an error at exit for the following example:
from PyQt4 import QtGui
app = QtGui.QApplication([])
v1 = QtGui.QGraphicsView()
s1 = QtGui.QGraphicsScene()
v1.setScene(s1)
v2 = QtGui.QGraphicsView()
s2 = QtGui.QGraphicsScene()
v2.setScene(s2)
The error is this:
QPixmap: Must cons
Hello,
Many of QPainter's methods accept arrays of simple classes such as QPoint,
QRect, and PixmapFragment (for eaxmple, drawPoints, drawLines,
drawPixmapFragments, etc). Currently, it is required to pass lists of
wrapped objects to access these methods. This is very inefficient,
especially if th
Howdy,
I am using PyQt 4.10.1 (Py2.7-qt4.8.4-x32) on windows XP. It appears that
on this system, QImage(sip.voidptr, int, int, format) increases the
reference count to the image data object, but does not decrease the
refcount after the QImage is collected. Here's an example session, where I
am gene
On Fri, May 24, 2013 at 1:42 PM, Phil Thompson
wrote:
> On Thu, 23 May 2013 16:21:26 -0400, Luke Campagnola
> wrote:
> > Howdy,
> > I am using PyQt 4.10.1 (Py2.7-qt4.8.4-x32) on windows XP. It appears
> that
> > on this system, QImage(sip.voidptr, int, int, format)
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