Re: [PyQt] PyQt4 question
On Montag, 28. Mai 2007, David Boddie wrote: > On Sun May 27 22:57:23 BST 2007, Andreas Pakulat wrote: > > On 27.05.07 14:53:08, Detlev Offenbach wrote: > > > On Sonntag, 27. Mai 2007, Giovanni Bajo wrote: > > > > Uh? Does QDesignerFormEditorPluginInterface inherit from QObject? > > > > Otherwise, I can't see how the qobject_cast can work. > > > > > > I have no idea. I had a look into edyuk, and they do it that way and it > > > works there (unless there is some magic somewhere else in their code). > > > > One reason could be that the QDesignerFormEditorPluginInterface is a > > Q_INTERFACE and the real QObject-derived implementation declares its > > inheritance from that interface. I guess qobject_cast<> takes that into > > account. > > That makes sense. Those classes are supposed to be subclassed (mixed in) > with QObject in C++ in order to declare interfaces. You would never > subclass them alone. > So, how can I check, if a QObject is of the interface type? How can stuff like this be wrapped? See my other post about the "qt_extension" function of QExtensionManager not being wrapped? All that stuff need to be available in order to tightly integrate designer into eric4. Detlev -- Detlev Offenbach [EMAIL PROTECTED] ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] PyQt4 question
On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> On Sunday 27 May 2007 1:10 pm, Detlev Offenbach wrote:
> > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > On Sunday 27 May 2007 12:37 pm, Detlev Offenbach wrote:
> > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > On Sunday 27 May 2007 11:50 am, Detlev Offenbach wrote:
> > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > On Saturday 26 May 2007 9:07 pm, Detlev Offenbach wrote:
> > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > On Saturday 26 May 2007 7:58 pm, Detlev Offenbach wrote:
> > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > On Saturday 26 May 2007 4:52 pm, Detlev Offenbach wrote:
> > > > > > > > > > > > Hi,
> > > > > > > > > > > >
> > > > > > > > > > > > is there a PyQt equivalent to
> > > > > > > > > > > > "qobject_cast(object)"?
> > > > > > > > > > >
> > > > > > > > > > > sip.cast()?
> > > > > > > > > > >
> > > > > > > > > > > But it shouldn't be necessary if the sub-class
> > > > > > > > > > > conversion code has been properly implemented.
> > > > > > > > > >
> > > > > > > > > > How do I do that. I haven't wrapped complicated stuff
> > > > > > > > > > like this so far. The situation is as follows. I have the
> > > > > > > > > > following code:
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > self.plugins.extend(self.designer.pluginManager().instanc
> > > > > > > > > >es () ) for plugin in self.plugins:
> > > > > > > > > > if isinstance(plugin,
> > > > > > > > > > QDesignerFormEditorPluginInterface): if not
> > > > > > > > > > plugin.isInitialized(): plugin.initialze(self.designer)
> > > > > > > > > >
> > > > > > > > > >
> > > > > > > > > > "self.designer.pluginManager().instances()" returns a
> > > > > > > > > > list of QObject. The first if statement shall check,
> > > > > > > > > > wether the returned QObject is of type
> > > > > > > > > > QDesignerFormEditorPluginInterface. In C++ you would do
> > > > > > > > > > it with code like
> > > > > > > > > >
> > > > > > > > > > if (
> > > > > > > > > > (qobject_cast(plugin
> > > > > > > > > >)) )
> > > > > > > > > >
> > > > > > > > > > How can the problem be solved with PyQt4 and Python?
> > > > > > > > > >
> > > > > > > > > > Note: self.designer.pluginManager() returns an object of
> > > > > > > > > > type QDesignerPluginManager.
> > > > > > > > >
> > > > > > > > > The wrapper for QDesignerFormEditorPluginInterface must
> > > > > > > > > define some %ConvertToSubClassCode which will use RTTI
> > > > > > > > > provided by the instance to identify the right Python type
> > > > > > > > > object. See how PyQt does it for QObject and QEvent. If the
> > > > > > > > > instance doesn't provide any RTTI then you're stuck.
> > > > > > > >
> > > > > > > > Mustn't the %ConvertToSubClassCode go into the more general
> > > > > > > > class (e.g. QObject)?
> > > > > > >
> > > > > > > No - just in a QObject sub-class in the module.
> > > > > > >
> > > > > > > > Is there a way to extend the QObject wrapper?
> > > > > > >
> > > > > > > That's what sip does under the covers.
> > > > > >
> > > > > > I am stuck at the moment due to my lack of sip know how. Below is
> > > > > > the wrapper code in question. How does the %ConvertToSubClassCode
> > > > > > have to be?
> > > > > >
> > > > > > -
> > > > > >-- -- -- -- -- - class QDesignerFormEditorPluginInterface
> > > > > > {
> > > > > >
> > > > > > %TypeHeaderCode
> > > > > > #include
> > > > > > %End
> > > > > >
> > > > > > public:
> > > > > > virtual ~QDesignerFormEditorPluginInterface();
> > > > > >
> > > > > > virtual bool isInitialized() const = 0;
> > > > > > virtual void initialize(QDesignerFormEditorInterface *core) =
> > > > > > 0; virtual QAction *action() const = 0;
> > > > > >
> > > > > > virtual QDesignerFormEditorInterface *core() const = 0;
> > > > > > };
> > > > > > -
> > > > > >-- -- -- -- --
> > > > >
> > > > > What RTTI is available for the code to determine what the class
> > > > > really is? I can't see anything that is obviously suitable - in
> > > > > which case you are stuck.
> > > >
> > > > In a C++ program one would do it with this statement
> > > >
> > > > qobject_cast(object)
> > > >
> > > > where object is a pointer to a QObject. If the conversion code would
> > > > be in QObject.sip, one could probably use the inherits() method of
> > > > QObject.
> > >
> > > So that's what you put in your conversion code in your
> > > QDesignerFormEditorPluginInterface class.
> >
> > I tried that before I posted to this list, but it didn't work. Phil, can
> > you give a little help?
>
> Post what you tried.
I tried it with the following code:
%ModuleHeaderCode
#include
%End
class QDesignerFormEditorPluginInterface
{
%TypeHeaderCode
#include
%End
%ConvertToSubClassCode
if ( (qobjec
Re: [PyQt] PyQt4 question (follow on)
On Montag, 28. Mai 2007, Detlev Offenbach wrote:
> On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > On Sunday 27 May 2007 1:10 pm, Detlev Offenbach wrote:
> > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > On Sunday 27 May 2007 12:37 pm, Detlev Offenbach wrote:
> > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > On Sunday 27 May 2007 11:50 am, Detlev Offenbach wrote:
> > > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > > On Saturday 26 May 2007 9:07 pm, Detlev Offenbach wrote:
> > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > On Saturday 26 May 2007 7:58 pm, Detlev Offenbach wrote:
> > > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > > On Saturday 26 May 2007 4:52 pm, Detlev Offenbach
wrote:
> > > > > > > > > > > > > Hi,
> > > > > > > > > > > > >
> > > > > > > > > > > > > is there a PyQt equivalent to
> > > > > > > > > > > > > "qobject_cast(object)"?
> > > > > > > > > > > >
> > > > > > > > > > > > sip.cast()?
> > > > > > > > > > > >
> > > > > > > > > > > > But it shouldn't be necessary if the sub-class
> > > > > > > > > > > > conversion code has been properly implemented.
> > > > > > > > > > >
> > > > > > > > > > > How do I do that. I haven't wrapped complicated stuff
> > > > > > > > > > > like this so far. The situation is as follows. I have
> > > > > > > > > > > the following code:
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > self.plugins.extend(self.designer.pluginManager().insta
> > > > > > > > > > >nc es () ) for plugin in self.plugins:
> > > > > > > > > > > if isinstance(plugin,
> > > > > > > > > > > QDesignerFormEditorPluginInterface): if not
> > > > > > > > > > > plugin.isInitialized(): plugin.initialze(self.designer)
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > "self.designer.pluginManager().instances()" returns a
> > > > > > > > > > > list of QObject. The first if statement shall check,
> > > > > > > > > > > wether the returned QObject is of type
> > > > > > > > > > > QDesignerFormEditorPluginInterface. In C++ you would do
> > > > > > > > > > > it with code like
> > > > > > > > > > >
> > > > > > > > > > > if (
> > > > > > > > > > > (qobject_cast(plug
> > > > > > > > > > >in )) )
> > > > > > > > > > >
> > > > > > > > > > > How can the problem be solved with PyQt4 and Python?
> > > > > > > > > > >
> > > > > > > > > > > Note: self.designer.pluginManager() returns an object
> > > > > > > > > > > of type QDesignerPluginManager.
> > > > > > > > > >
> > > > > > > > > > The wrapper for QDesignerFormEditorPluginInterface must
> > > > > > > > > > define some %ConvertToSubClassCode which will use RTTI
> > > > > > > > > > provided by the instance to identify the right Python
> > > > > > > > > > type object. See how PyQt does it for QObject and QEvent.
> > > > > > > > > > If the instance doesn't provide any RTTI then you're
> > > > > > > > > > stuck.
> > > > > > > > >
> > > > > > > > > Mustn't the %ConvertToSubClassCode go into the more general
> > > > > > > > > class (e.g. QObject)?
> > > > > > > >
> > > > > > > > No - just in a QObject sub-class in the module.
> > > > > > > >
> > > > > > > > > Is there a way to extend the QObject wrapper?
> > > > > > > >
> > > > > > > > That's what sip does under the covers.
> > > > > > >
> > > > > > > I am stuck at the moment due to my lack of sip know how. Below
> > > > > > > is the wrapper code in question. How does the
> > > > > > > %ConvertToSubClassCode have to be?
> > > > > > >
> > > > > > > ---
> > > > > > >-- -- -- -- -- -- - class QDesignerFormEditorPluginInterface {
> > > > > > >
> > > > > > > %TypeHeaderCode
> > > > > > > #include
> > > > > > > %End
> > > > > > >
> > > > > > > public:
> > > > > > > virtual ~QDesignerFormEditorPluginInterface();
> > > > > > >
> > > > > > > virtual bool isInitialized() const = 0;
> > > > > > > virtual void initialize(QDesignerFormEditorInterface *core)
> > > > > > > = 0; virtual QAction *action() const = 0;
> > > > > > >
> > > > > > > virtual QDesignerFormEditorInterface *core() const = 0;
> > > > > > > };
> > > > > > > ---
> > > > > > >-- -- -- -- -- --
> > > > > >
> > > > > > What RTTI is available for the code to determine what the class
> > > > > > really is? I can't see anything that is obviously suitable - in
> > > > > > which case you are stuck.
> > > > >
> > > > > In a C++ program one would do it with this statement
> > > > >
> > > > > qobject_cast(object)
> > > > >
> > > > > where object is a pointer to a QObject. If the conversion code
> > > > > would be in QObject.sip, one could probably use the inherits()
> > > > > method of QObject.
> > > >
> > > > So that's what you put in your conversion code in your
> > > > QDesignerFormEditorPluginInterface class.
> > >
> > > I tried that before I posted to this list, bu
Re: [PyQt] PyQt4 question (follow on)
On Monday 28 May 2007 9:53 am, Detlev Offenbach wrote:
> On Montag, 28. Mai 2007, Detlev Offenbach wrote:
> > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > On Sunday 27 May 2007 1:10 pm, Detlev Offenbach wrote:
> > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > On Sunday 27 May 2007 12:37 pm, Detlev Offenbach wrote:
> > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > On Sunday 27 May 2007 11:50 am, Detlev Offenbach wrote:
> > > > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > > > On Saturday 26 May 2007 9:07 pm, Detlev Offenbach wrote:
> > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > On Saturday 26 May 2007 7:58 pm, Detlev Offenbach wrote:
> > > > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > > > On Saturday 26 May 2007 4:52 pm, Detlev Offenbach
>
> wrote:
> > > > > > > > > > > > > > Hi,
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > is there a PyQt equivalent to
> > > > > > > > > > > > > > "qobject_cast(object)"?
> > > > > > > > > > > > >
> > > > > > > > > > > > > sip.cast()?
> > > > > > > > > > > > >
> > > > > > > > > > > > > But it shouldn't be necessary if the sub-class
> > > > > > > > > > > > > conversion code has been properly implemented.
> > > > > > > > > > > >
> > > > > > > > > > > > How do I do that. I haven't wrapped complicated stuff
> > > > > > > > > > > > like this so far. The situation is as follows. I have
> > > > > > > > > > > > the following code:
> > > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > > > self.plugins.extend(self.designer.pluginManager().ins
> > > > > > > > > > > >ta nc es () ) for plugin in self.plugins:
> > > > > > > > > > > > if isinstance(plugin,
> > > > > > > > > > > > QDesignerFormEditorPluginInterface): if not
> > > > > > > > > > > > plugin.isInitialized():
> > > > > > > > > > > > plugin.initialze(self.designer)
> > > > > > > > > > > >
> > > > > > > > > > > >
> > > > > > > > > > > > "self.designer.pluginManager().instances()" returns a
> > > > > > > > > > > > list of QObject. The first if statement shall check,
> > > > > > > > > > > > wether the returned QObject is of type
> > > > > > > > > > > > QDesignerFormEditorPluginInterface. In C++ you would
> > > > > > > > > > > > do it with code like
> > > > > > > > > > > >
> > > > > > > > > > > > if (
> > > > > > > > > > > > (qobject_cast(pl
> > > > > > > > > > > >ug in )) )
> > > > > > > > > > > >
> > > > > > > > > > > > How can the problem be solved with PyQt4 and Python?
> > > > > > > > > > > >
> > > > > > > > > > > > Note: self.designer.pluginManager() returns an object
> > > > > > > > > > > > of type QDesignerPluginManager.
> > > > > > > > > > >
> > > > > > > > > > > The wrapper for QDesignerFormEditorPluginInterface must
> > > > > > > > > > > define some %ConvertToSubClassCode which will use RTTI
> > > > > > > > > > > provided by the instance to identify the right Python
> > > > > > > > > > > type object. See how PyQt does it for QObject and
> > > > > > > > > > > QEvent. If the instance doesn't provide any RTTI then
> > > > > > > > > > > you're stuck.
> > > > > > > > > >
> > > > > > > > > > Mustn't the %ConvertToSubClassCode go into the more
> > > > > > > > > > general class (e.g. QObject)?
> > > > > > > > >
> > > > > > > > > No - just in a QObject sub-class in the module.
> > > > > > > > >
> > > > > > > > > > Is there a way to extend the QObject wrapper?
> > > > > > > > >
> > > > > > > > > That's what sip does under the covers.
> > > > > > > >
> > > > > > > > I am stuck at the moment due to my lack of sip know how.
> > > > > > > > Below is the wrapper code in question. How does the
> > > > > > > > %ConvertToSubClassCode have to be?
> > > > > > > >
> > > > > > > > -
> > > > > > > >-- -- -- -- -- -- -- - class
> > > > > > > > QDesignerFormEditorPluginInterface {
> > > > > > > >
> > > > > > > > %TypeHeaderCode
> > > > > > > > #include
> > > > > > > > %End
> > > > > > > >
> > > > > > > > public:
> > > > > > > > virtual ~QDesignerFormEditorPluginInterface();
> > > > > > > >
> > > > > > > > virtual bool isInitialized() const = 0;
> > > > > > > > virtual void initialize(QDesignerFormEditorInterface
> > > > > > > > *core) = 0; virtual QAction *action() const = 0;
> > > > > > > >
> > > > > > > > virtual QDesignerFormEditorInterface *core() const = 0;
> > > > > > > > };
> > > > > > > > -
> > > > > > > >-- -- -- -- -- -- --
> > > > > > >
> > > > > > > What RTTI is available for the code to determine what the class
> > > > > > > really is? I can't see anything that is obviously suitable - in
> > > > > > > which case you are stuck.
> > > > > >
> > > > > > In a C++ program one would do it with this statement
> > > > > >
> > > > > > qobject_cast(object)
> > > > > >
> > > > > > where object is a pointer to a QObject. If th
Re: [PyQt] C++ and embedded python, how to share gui thread?
recap: I have python embedded in a C++ Qt application. Running non-gui python scripts works fine, but using qt from within python hangs the program. I have run my code through strace and it appears that the program hangs of a futex call which never returns. I have to send a SIGKILL to make it abort. I also have to correct my previous statement concerning Ubuntu Feisty. I get the same problem there as with Debian Etch, it was an old binary that I could make to work on Feisty. /Michael On Fri, 2007-05-25 at 08:30 +0200, Michael Olberg wrote: > Just a follow-up: on a recently installed Debian etch my old problem is > back, i.e. a python script trying to open a Qt dialog hangs the C++ Qt > application where python is embedded. > > The exactly same program works fine in Ubuntu feisty as reported > earlier. The application was originally developed under Debian sarge, > where it also worked, but I had to stick to a particular version of > python-qt. > > /Michael > > On Thu, 2007-05-17 at 12:19 +0200, Michael Olberg wrote: > > I have just installed Ubuntu Feisty on my laptop and everything appears to > > work > > fine again. So consider the problem solved for the moment ;-). > > > > thanks for all advice I received, > > Michael > > > > Patrick Stinson wrote: > > > there is only one QApplication. Even in apps where you are writing a > > > graphical plugin that will be used in a native event loop, you have to > > > manage one QApplication instance. So, if your C++ app created a > > > QApplication then you don't have to worry about it just create the > > > PyQt widgets at will. This will all work the best if the qt lib you > > > are using is a shared library or dll, because you don't want to link > > > it in twice; once with the C++ app and once with the PyQt4 module. > > > > > > I Hope that helps a little. I have more info on how I did the same thing > > > here: > > > > > > http://www.patrickkidd.com/pk/trac/wiki/EmbeddedPythonWidgets > > > > > > On 5/16/07, Michael Olberg <[EMAIL PROTECTED]> wrote: > > >> Dear all, > > >> > > >> I have a scientific application programmed in C++ with the Qt widget > > >> set. I have > > >> embedded a Python interpreter to allow me to control the application via > > >> scripts. I can even import the python-qt bindings in those scripts and > > >> create > > >> graphical dialogs. So at present everything works(!) as expected. > > >> > > >> However, this works with an old setup of Debian sarge and the > > >> python2.3-qt3_3.11-4_i386.deb package. A number of upgrades have > > >> happened since > > >> then, with python, with qt, and even with Debian. With newer versions > > >> non-graphical scripts still work, but any attempt to open Qt dialogs > > >> from the > > >> embedded python interpreter hangs the application. > > >> > > >> It appears to me that this has to do with how later versions of the > > >> python-qt > > >> package access the main Qt GUI thread, which in my case is already > > >> started by > > >> the underlying C++ application. > > >> > > >> I wonder if this is documented somewhere, with an example on how to > > >> start the > > >> python interpreter so that the C++ and python can share the same Qt > > >> GUI? I'd > > >> very much like to upgrade my system without breaking this application, > > >> which I > > >> use for daily work. > > >> > > >> any info appreciated, > > >> Michael > > >> ___ > > >> PyQt mailing listPyQt@riverbankcomputing.com > > >> http://www.riverbankcomputing.com/mailman/listinfo/pyqt > > >> > > > > > > > > ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] PyQt4 question (follow on)
On Montag, 28. Mai 2007, Phil Thompson wrote:
> On Monday 28 May 2007 9:53 am, Detlev Offenbach wrote:
> > On Montag, 28. Mai 2007, Detlev Offenbach wrote:
> > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > On Sunday 27 May 2007 1:10 pm, Detlev Offenbach wrote:
> > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > On Sunday 27 May 2007 12:37 pm, Detlev Offenbach wrote:
> > > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > > On Sunday 27 May 2007 11:50 am, Detlev Offenbach wrote:
> > > > > > > > > On Sonntag, 27. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > On Saturday 26 May 2007 9:07 pm, Detlev Offenbach wrote:
> > > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > > On Saturday 26 May 2007 7:58 pm, Detlev Offenbach
wrote:
> > > > > > > > > > > > > On Samstag, 26. Mai 2007, Phil Thompson wrote:
> > > > > > > > > > > > > > On Saturday 26 May 2007 4:52 pm, Detlev Offenbach
> >
> > wrote:
> > > > > > > > > > > > > > > Hi,
> > > > > > > > > > > > > > >
> > > > > > > > > > > > > > > is there a PyQt equivalent to
> > > > > > > > > > > > > > > "qobject_cast(object)"?
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > sip.cast()?
> > > > > > > > > > > > > >
> > > > > > > > > > > > > > But it shouldn't be necessary if the sub-class
> > > > > > > > > > > > > > conversion code has been properly implemented.
> > > > > > > > > > > > >
> > > > > > > > > > > > > How do I do that. I haven't wrapped complicated
> > > > > > > > > > > > > stuff like this so far. The situation is as
> > > > > > > > > > > > > follows. I have the following code:
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > > > self.plugins.extend(self.designer.pluginManager().i
> > > > > > > > > > > > >ns ta nc es () ) for plugin in self.plugins:
> > > > > > > > > > > > > if isinstance(plugin,
> > > > > > > > > > > > > QDesignerFormEditorPluginInterface): if not
> > > > > > > > > > > > > plugin.isInitialized():
> > > > > > > > > > > > > plugin.initialze(self.designer)
> > > > > > > > > > > > >
> > > > > > > > > > > > >
> > > > > > > > > > > > > "self.designer.pluginManager().instances()" returns
> > > > > > > > > > > > > a list of QObject. The first if statement shall
> > > > > > > > > > > > > check, wether the returned QObject is of type
> > > > > > > > > > > > > QDesignerFormEditorPluginInterface. In C++ you
> > > > > > > > > > > > > would do it with code like
> > > > > > > > > > > > >
> > > > > > > > > > > > > if (
> > > > > > > > > > > > > (qobject_cast(
> > > > > > > > > > > > >pl ug in )) )
> > > > > > > > > > > > >
> > > > > > > > > > > > > How can the problem be solved with PyQt4 and
> > > > > > > > > > > > > Python?
> > > > > > > > > > > > >
> > > > > > > > > > > > > Note: self.designer.pluginManager() returns an
> > > > > > > > > > > > > object of type QDesignerPluginManager.
> > > > > > > > > > > >
> > > > > > > > > > > > The wrapper for QDesignerFormEditorPluginInterface
> > > > > > > > > > > > must define some %ConvertToSubClassCode which will
> > > > > > > > > > > > use RTTI provided by the instance to identify the
> > > > > > > > > > > > right Python type object. See how PyQt does it for
> > > > > > > > > > > > QObject and QEvent. If the instance doesn't provide
> > > > > > > > > > > > any RTTI then you're stuck.
> > > > > > > > > > >
> > > > > > > > > > > Mustn't the %ConvertToSubClassCode go into the more
> > > > > > > > > > > general class (e.g. QObject)?
> > > > > > > > > >
> > > > > > > > > > No - just in a QObject sub-class in the module.
> > > > > > > > > >
> > > > > > > > > > > Is there a way to extend the QObject wrapper?
> > > > > > > > > >
> > > > > > > > > > That's what sip does under the covers.
> > > > > > > > >
> > > > > > > > > I am stuck at the moment due to my lack of sip know how.
> > > > > > > > > Below is the wrapper code in question. How does the
> > > > > > > > > %ConvertToSubClassCode have to be?
> > > > > > > > >
> > > > > > > > > ---
> > > > > > > > >-- -- -- -- -- -- -- -- - class
> > > > > > > > > QDesignerFormEditorPluginInterface {
> > > > > > > > >
> > > > > > > > > %TypeHeaderCode
> > > > > > > > > #include
> > > > > > > > > %End
> > > > > > > > >
> > > > > > > > > public:
> > > > > > > > > virtual ~QDesignerFormEditorPluginInterface();
> > > > > > > > >
> > > > > > > > > virtual bool isInitialized() const = 0;
> > > > > > > > > virtual void initialize(QDesignerFormEditorInterface
> > > > > > > > > *core) = 0; virtual QAction *action() const = 0;
> > > > > > > > >
> > > > > > > > > virtual QDesignerFormEditorInterface *core() const = 0;
> > > > > > > > > };
> > > > > > > > > ---
> > > > > > > > >-- -- -- -- -- -- -- --
> > > > > > > >
> > > > > > > > What RTTI is available for the code to determine what the
> > > > > > > > class really is? I can't see any
[PyQt] [Errno 4] Interrupted system call
Hi, I'm having consistent problems using the python subprocess module in PyQT applications. os.read() & os.wait() calls seem to be interrupted intermittently, in a manner similar to the following stack trace: File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", line 593, in __init__ errread, errwrite) File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", line 1046, in _execute_child data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB OSError: [Errno 4] Interrupted system call The only mention I could find about this online is at: http://mail.python.org/pipermail/python-list/2007-February/427031.html which just recommends retrying the operation. Does anyone know what the root of this problem is? How can it be solved effectively? Thanks and best regards, Jeremy smime.p7s Description: S/MIME Cryptographic Signature ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] [Errno 4] Interrupted system call
Hi Jeremy On 5/28/07, Jeremy Moskovich <[EMAIL PROTECTED]> wrote: Hi, I'm having consistent problems using the python subprocess module in PyQT applications. os.read() & os.wait() calls seem to be interrupted intermittently, in a manner similar to the following stack trace: File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", line 593, in __init__ errread, errwrite) File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", line 1046, in _execute_child data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB OSError: [Errno 4] Interrupted system call The only mention I could find about this online is at: http://mail.python.org/pipermail/python-list/2007-February/427031.html which just recommends retrying the operation. I've never experienced an interruption during the construction of a Popen object, which seems to be the case here. Calls to Popen.wait, on the other hand, did get interrupted all the time on OS X (no idea why), so I had to catch EINTR and retry. Are you using the very latest Python though? I have version 2.5.1 on Ubuntu, and from browsing subprocess.py I see that os.read is now wrapped, so that the operation is always retried upon EINTR. Hope this helps, Arve ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] [Errno 4] Interrupted system call
On Monday 28 May 2007 18:54:47 Jeremy Moskovich wrote: > Hi, > I'm having consistent problems using the python subprocess module in > PyQT applications. > > os.read() & os.wait() calls seem to be interrupted intermittently, in a > manner similar to the following stack trace: > > File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", > line 593, in __init__ > errread, errwrite) > File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", > line 1046, in _execute_child > data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB > OSError: [Errno 4] Interrupted system call > > The only mention I could find about this online is at: > http://mail.python.org/pipermail/python-list/2007-February/427031.html > which just recommends retrying the operation. > > Does anyone know what the root of this problem is? How can it be solved > effectively You might want to try the following patch http://librarian.launchpad.net/6820347/subprocess-eintr-safety.patch . The bug report is @ http://sourceforge.net/tracker/index.php?func=detail&aid=1068268&group_id=5470&atid=105470 /ismail -- Perfect is the enemy of good signature.asc Description: This is a digitally signed message part. ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
Re: [PyQt] [Errno 4] Interrupted system call
Aha, so Ubuntu's version _is_ patched :) Arve On 5/28/07, Ismail Dönmez <[EMAIL PROTECTED]> wrote: On Monday 28 May 2007 18:54:47 Jeremy Moskovich wrote: > Hi, > I'm having consistent problems using the python subprocess module in > PyQT applications. > > os.read() & os.wait() calls seem to be interrupted intermittently, in a > manner similar to the following stack trace: > > File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", > line 593, in __init__ > errread, errwrite) > File "/homes/jeremym/programs/python2.5/lib/python2.5/subprocess.py", > line 1046, in _execute_child > data = os.read(errpipe_read, 1048576) # Exceptions limited to 1 MB > OSError: [Errno 4] Interrupted system call > > The only mention I could find about this online is at: > http://mail.python.org/pipermail/python-list/2007-February/427031.html > which just recommends retrying the operation. > > Does anyone know what the root of this problem is? How can it be solved > effectively You might want to try the following patch http://librarian.launchpad.net/6820347/subprocess-eintr-safety.patch . The bug report is @ http://sourceforge.net/tracker/index.php?func=detail&aid=1068268&group_id=5470&atid=105470 /ismail -- Perfect is the enemy of good ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt ___ PyQt mailing listPyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
