gmane.comp.python.pyqt-pykde

QImage memory leak in 4.10.1

Luke Campagnola — 2013-05-23T20:21:26

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 generating a QImage from a numpy array:

2
3
<weakref at 0161F090; dead>  # QImage was collected
3


Can anyone recommend a good way to convert from ndarray to QImage
(preferrably without incurring any memory copy) ?

Thanks,
Luke

Old style signal/slot bug on win32

Giuseppe Corbelli — 2013-05-23T08:27:28

Hi all
I've found a strange bug on win32 using PyQt old style signals.
Sometimes I get a wrong result from QObject::receivers and the signal is 
"lost". Looks like a PyQt bug cause a similar C++ example works correctly both 
on Linux and Win32.
Sidenotes:
* changing the signature for every new CRS instance seems to workaround the bug
* not deleting (keeping a reference) every new CRS instance seems to 
workaround the bug
* new style signals seem to work OK

Tested on:
Python 2.7.3 (default, Mar  5 2013, 01:19:40) [GCC 4.7.2] on linux2
PYQT_VERSION_STR='snapshot-4.10.2-d9c6e01fe9ce'
QtCore.QT_VERSION_STR='4.8.2'
Linux 3.3.5 #1 SMP/32bit

Python 2.7.3 (default, Dec 18 2012, 17:53:47) [MSC v.1500 32 bit (Intel)]
PYQT_VERSION_STR='4.9.6'
QT_VERSION_STR='4.8.4'
Windows 7/32bit and XP/32bit

As programs output I expect matching emit/receive logs and 1 single receiver.
Attached python and c++ examples.
Python program uses an "nexplode.txt" logfile in append mode, while C++ uses 
qDebug()

Wizard next buttons signals

Stefanie Lück — 2013-05-22T13:27:25

Hello everybody!

I'm new to PyQT. I have a wizard with several pages and I can not figure
out how I can make signals to the next and finish buttons.

How do I connect signals to the next and finish button of a certain page?
I tried to find something in internet but I found no examples...

Any help is very appreciated!
Stefanie

simulate mouse select in dropdown in QWebView

Jiangcheng Bao — 2013-05-22T01:25:33

I am trying to simulate a mouse select a dropdown selection, but the
following code doesn't seem to work:

            select_elm = browser.findFirst('select[id="myselect"]')
            if not select_elm.isNull():
                select_elm.evaluateJavaScript("this.selectedIndex=1")

It neither changes the selected child element, nor does it trigger the
changes on the page that a manual user select would have done.

I'd like to simulate mouse select because it would also trigger other
changes on the page, so just trying to set the option element inside does
not do what I need.

Anybody has experience with this?

Thanks
Bao

Problem Eric tutorial

al — 2013-05-21T17:14:09

Hi folks,

working on the Eric tutorial http://eric-ide.python-projects.org/tutorials/LogParser/index.html I ran into trouble:

"object has no  attribute retranslateUi"

I know that I have a newer Code Generator PyQt4 UI code generator 4.4.2 <-> 4.10.1.
When I use the tutorial files which I have downloaded from 
http://eric-ide.python-projects.org/tutorials/LogParser/src/LogParser.zip and create a new project of this I get the project running.

But when I follow the tutorial and try to do my own source code I get the above problem.

Comparing
 the source I can find that in the downloaded source in Ui_LogParser.py a
 def retranslateUi(self, MainWindow) section is generated but not in my 
generated code. :-(

How can I solve this issue and avoid the above error message?

Re: Build error with PyQt4 4.10 on Mac 10.7.5

Larry Shaffer — 2013-05-21T17:12:59

Hi Phil,

On Fri, Apr 12, 2013 at 4:28 AM, Phil Thompson
<phil< at >riverbankcomputing.com>wrote:


Finally got back to this. Indeed the issue was a different header being
included. I had (evidently) accidentally installed sip 4.14.0 in the Mac
System path before (I usually prefix to /usr/local).

However, I did notice an issue when configuring/installing PyQt4, where it
did not seems to honor the configured .sip dest dir.

sip build configure:
python2.7 configure.py -d /Library/Python/2.7/site-packages \
  -b /usr/local/bin -e /usr/local/include -v /usr/local/share/sip

PyQt4 build configure:
python2.7 configure.py -d /Library/Python/2.7/site-packages \
  -b /usr/local/bin -n /usr/local/Qt4.8/qsci

The .sip files for PyQt4 were placed in:
/System/Library/Frameworks/Python.framework/Versions/2.7/share/sip/PyQt4
not:
/usr/local/share/sip/PyQt4

specifically adding the following to the PyQt4 build configure line worked:
-v /usr/local/share/sip/PyQt4

This was with both configure.py and configure-ng.py. Shouldn't the .sip
dest dir be picked up from sip as a default for building PyQt4?


Regards,

Larry Shaffer
Dakota Cartography
Black Hills, South Dakota

Cannot add item to itemgroups while itemchange() is defined

Zoellner, Christian — 2013-05-21T09:56:28

Hello guys,
I currently have a very mysterious problem with PyQT and neither Stackoverflow (http://stackoverflow.com/q/16614187/2394681) nor any of my friends and coworkers can help me with it.
I'm building a PyQt QGraphicsView project where some QGraphicItems can be moved around between different QGraphicsItemGroups. For that, I use the addItemToGroup() method of the "new" parent itemGroup.
This works fine, but only so long as I do not define the itemChange() method in my custom child-item class. Once I define that method (even if I just pass the function call to the super class), the childItems will not be added to ItemGroups no matter what I try.
class MyChildItem(QtGui.QGraphicsItemGroup):
    def itemChange(self, change, value):
        # TODO: Do something for certain cases of ItemPositionChange
        return QtGui.QGraphicsItemGroup.itemChange(self, change, value)
        #return super().itemChange(change, value)   # Tried this variation too
Am I simply too stupid for properly calling a superclass method in Python, or is the problem somewhere in the QT / PyQT magic?
I use Python 3.3 with PyQt 4.8 and QT 5.
I would really appreciate any kind of help or ideas.
Thanks a lot,
Christian Zöllner

Re: [Mac] PyQt5 and Qt5.1.0 beta 1 - NameError: global name 'QApplication' is not defined

Chris Roebuck — 2013-05-20T23:08:24

Thanks all


On 20 May 2013 22:12, Phil Thompson <phil< at >riverbankcomputing.com> wrote:

Re: [Mac] PyQt5 and Qt5.1.0 beta 1 - NameError: global name 'QApplication' is not defined

Phil Thompson — 2013-05-20T21:12:54

On Mon, 20 May 2013 20:03:16 +0100, Chris Roebuck <chris< at >cjroebuck.com>
wrote:
then
simple

from PyQt5.QtWidgets import QApplication

Phil

[Mac] PyQt5 and Qt5.1.0 beta 1 - NameError: global name 'QApplication' is not defined

Chris Roebuck — 2013-05-20T19:03:16

Using osx 10.8.3 I installed Qt5.1.0 beta1 using the binary installer, then
built sip 4.14.7 dev snapshot and PyQt5 against Qt5.1.0 beta1

Using python3 I'm getting the following error when I try to run this simple
script:

#!/usr/bin/env python
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from PyQt5.QtWebKit import *
from PyQt5.QtNetwork import *

QApplication.instance()



NameError: name 'QApplication' is not defined

Any ideas what i'm missing?

Eric5 Tutorial problem

al — 2013-05-20T17:54:38

Hi folks,

working on the Eric tutorial http://eric-ide.python-projects.org/tutorials/LogParser/index.html I ran into trouble:

"object has no  attribute retranslateUi"

I know that I have a newer Code Generator PyQt4 UI code generator 4.4.2 <-> 4.10.1.

When I use the tutorial files which I have downloaded from http://eric-ide.python-projects.org/tutorials/LogParser/src/LogParser.zip and create a new project of this I get the project running.

But when I follow the tutorial and try to do my own source code I get the above problems.

Comparing the source I can find that in the downloaded source in Ui_LogParser.py a def retranslateUi(self, MainWindow) section is generated but not in my generated code. :-(

How can I solve this issue and avoid the above error message?

Re: PyQt5 QtQuick 2.0 binding

Phil Thompson — 2013-05-15T14:07:54

On Wed, 15 May 2013 15:58:52 +0200, Wojciech Daniło
<wojtek.danilo.ml< at >gmail.com> wrote:

No. The first release of PyQt5 will be the same as PyQt4 will all the
deprecated, obsolete stuff removed.

Phil
_______________________________________________
PyQt mailing list    PyQt< at >riverbankcomputing.com
http://www.riverbankcomputing.com/mailman/listinfo/pyqt

PyQt5 QtQuick 2.0 binding

Wojciech Daniło — 2013-05-15T13:58:52

Hi! Is PyQt5 working with QtQuick2.0?

Re: PyQt5 installation problem

Phil Thompson — 2013-05-15T13:53:42

On Wed, 15 May 2013 15:36:51 +0200, Wojciech Daniło
<wojtek.danilo.ml< at >gmail.com> wrote:
for

Which, if you look at the message, is ignored.

Phil
_______________________________________________
PyQt mailing list    PyQt< at >riverbankcomputing.com
http://www.riverbankcomputing.com/mailman/listinfo/pyqt

Re: PyQt5 installation problem

Wojciech Daniło — 2013-05-15T13:36:51

Thank you, using the latest snapshot it compiled successfully - sorry for
not testing it myself.
But while installation I get next error ...:
"strip:/usr/bin/pyuic5: File format not recognized"

full error stack:
http://pastebin.com/jT28DQmW


2013/5/15 Phil Thompson <phil< at >riverbankcomputing.com>

Re: PyQt5 installation problem

Phil Thompson — 2013-05-15T13:10:33

On Wed, 15 May 2013 15:05:22 +0200, Wojciech Daniło
<wojtek.danilo.ml< at >gmail.com> wrote:
compiling I
declared

Make sure you are using the current SIP snapshot.

Phil
_______________________________________________
PyQt mailing list    PyQt< at >riverbankcomputing.com
http://www.riverbankcomputing.com/mailman/listinfo/pyqt

Re: PyQt5 installation problem

Wojciech Daniło — 2013-05-15T13:05:22

Thank you! The problem was solved, but occured next one - while compiling I
get:
"qpycore_post_init.cpp:46:26: error: 'sipSetDestroyOnExit' was not declared
in this scope"

full error stack can be found here:  http://pastebin.com/rKxmmERd .



2013/5/15 Phil Thompson <phil< at >riverbankcomputing.com>

Re: PyQt5 installation problem

Phil Thompson — 2013-05-15T12:39:07

On Wed, 15 May 2013 14:23:35 +0200, Wojciech Daniło
<wojtek.danilo.ml< at >gmail.com> wrote:
Qt

Use the --qmake flag.

Phil
_______________________________________________
PyQt mailing list    PyQt< at >riverbankcomputing.com
http://www.riverbankcomputing.com/mailman/listinfo/pyqt

PyQt5 installation problem

Wojciech Daniło — 2013-05-15T12:23:35

Hi!
When I'm trying to install PyQt5 I get an error: Error: PyQt5 requires Qt
v5.0 or later.

My Qt5.0.2 installation is in my $HOME/dev/Qt5.0.2 - how can I tell the
configure script to search for it there?

Re: Paste entire column into QTableView from Excel

David Boddie — 2013-05-14T20:21:31


[...]


Does it crash or just become unresponsive?

Is there a limit on the amount of data that can be stored in the clipboard
on Windows? Maybe that could be a factor. Can you paste the whole column into
another application successfully?


You need to check what sort of MIME data is contained in the clipboard. The
QClipboard documentation should have example code for this.

David

Re: resizing layouts

andre hotz — 2013-05-14T16:38:44

Am 14.05.2013 18:18, schrieb Baz Walter:

Thanks for that swift response Baz!

I usually don't use the Qt Designer, but I tried what you said and it 
seems to work. Unfortunatly I can't generate the code from the Designer, 
pops up some error message, so I first have to figure this out ;)

But thanks anyway, now I have a direction to go!

Cheers,
Andre