On Fri, 19 Mar 2010 11:54:36 +0000, Stuart McNicholas
<[email protected]> wrote:
> I have a very simple program:
>
> from PyQt4 import QtGui, QtCore
> import sys
>
> class Win(QtGui.QWidget):
> SaveFiles = QtCore.pyqtSignal()
> def __init__(self,parent=None):
> QtGui.QWidget.__init__(self,parent)
> self.fileDialog = QtGui.QDialog()
> self.SaveFiles.connect(self.fileDialog.exec_)
> self.SaveFiles.emit()
>
> app = QtGui.QApplication(sys.argv)
>
> win = Win()
> win.show()
> win.raise_()
>
> sys.exit(app.exec_())
>
> which produces the error:
>
> Traceback (most recent call last):
> File "jif.py", line 23, in <module>
> win = Win()
> File "jif.py", line 18, in __init__
> self.SaveFiles.connect(self.fileDialog.exec_)
> TypeError: 'exec_()' has no overload that is compatible with
'SaveFiles()'
>
> This is with PyQt 4.7.2. The problem is not apparent in 4.7.
>
> If I subclass QDialog, the problem persists, but I can workaround by
> defining my own exec_ method.
Yuck - the problem is that it's using the Python method name (exec_) rather
than the C++ method name (exec) to look up the slot.
Attached is a patch that will fix it - looks like there will be a v4.7.3
fairly soon.
Phil
diff -r 9528814bc9bd qpy/QtCore/qpycore_pyqtboundsignal.cpp
--- a/qpy/QtCore/qpycore_pyqtboundsignal.cpp Wed Mar 17 18:26:22 2010 +0000
+++ b/qpy/QtCore/qpycore_pyqtboundsignal.cpp Fri Mar 19 12:52:03 2010 +0000
@@ -561,6 +561,13 @@
{
rx_self = PyCFunction_GET_SELF(slot_obj);
rx_name = ((PyCFunctionObject *)slot_obj)->m_ml->ml_name;
+
+ // We actually want the C++ name which may (in theory) be completely
+ // different. However this will cope with the exec_ case which is
+ // probably good enough.
+ if (rx_name.endsWith('_'))
+ rx_name.chop(1);
+
need_qt_slot = true;
}
else
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