On Tue, 24 Sep 2013 13:24:05 +0000 (UTC), David Boddie <dav...@met.no>
wrote:
> I'm running into problems with sip and custom signal arguments. I'm
> probably
> doing something wrong, and I'm hoping that someone might be able to put
me
> on
> the right track.
>
> I've written a class with this definition:
>
> #include <string>
> #include <vector>
> #include <QWidget>
>
> typedef std::vector<std::string> StringList;
>
> class Emitter : public QWidget
> {
> Q_OBJECT
>
> public:
> Emitter(QWidget *parent = 0);
> virtual ~Emitter();
>
> signals:
> void emitStrings(StringList);
> void emitStr(std::string, std::string);
> void emitQString(QString);
> };
>
> My sip wrapper starts with a typedef for the StringList type and
> %MappedType
> implementations for std::string and StringList:
Remove this typedef...
> typedef std::vector<std::string> StringList;
>
> %MappedType std::string
> {
> %TypeHeaderCode
> #include <string>
> %End
>
> ...
> };
>
> %MappedType StringList
> {
> %TypeHeaderCode
> #include <iostream>
> #include <string>
> #include <vector>
> typedef std::vector<std::string> StringList;
> %End
>
> ...
> };
>
> It also has this definition for the Emitter class:
>
> class Emitter : public QWidget
> {
> %TypeHeaderCode
> #include "Emitter.h"
> %End
>
> public:
> Emitter(QWidget *parent = 0);
> virtual ~Emitter();
>
> signals:
> void emitStrings(StringList);
> void emitStr(std::string, std::string);
> void emitQString(QString);
> };
>
> This all builds correctly, but the emitStrings signal does not appear to
> work
> correctly, causing a crash when accessed in apparently any way at all.
Even
> evaluating the signal object fails.
>
> Some elementary debugging indicates that the bound_overload member of
the
> qpycore_pyqtBoundSignal object is zero for this signal, and maybe this
> leads to
> the crash when trying to connect the signal to a slot.
>
> I'm using PyQt 4.9.1 and sip 4.13.2. I've attached a simple project to
> demonstrate the problem.
>
> David
SIP should probably complain about the typedef as you are effectively
providing two definitions for StringList.
Also in the current snapshot at least, you get a sensible exception.
Thanks,
Phil
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