On Sunday 16 September 2007, Hans-Peter Jansen wrote: > Hi *, > > I stumbled upon some strange effects with signal sender() and self.name() > properties in PyQt3. I had the impression, the latter is available > immediately after calling a QObject derived constructor, while the Qt3 > documentation states: > > Returns a pointer to the object that sent the signal, if called in a slot > activated by a signal; otherwise it returns 0. The pointer is valid only > during the execution of the slot that calls this function. > The pointer returned by this function becomes invalid if the sender is > destroyed, or if the slot is disconnected from the sender's signal. > > Hmm, that doesn't explain the effects I'm suffering from. > > Here's code, that tries to exercise these issues: > ... > > The sender resolves to an empty string and empty type inside the text edit: > > unnamed ready [(None, 'catcher')] > emitter added > timer added > (): counter 1 catched > (): timer catched > (): counter 2 catched > (): timer catched > (): counter 3 catched > > while it resolves either to some QTimer objects for both signals (the > python and Qt one) in the no arg case on the console: > > <qt.QTimer object at 0xb679502c> <class 'qt.QTimer'> > <qt.QTimer object at 0xb679505c> <class 'qt.QTimer'> > <qt.QTimer object at 0xb679502c> <class 'qt.QTimer'> > <qt.QTimer object at 0xb679505c> <class 'qt.QTimer'> > > In the command line arg case, it's missing the PYSIGNAL name and the types, > too: > > unnamed ready [(None, 'catcher')] > emitter added > timer added > unnamed (): counter 1 catched > timer (): timer catched > unnamed (): counter 2 catched > timer (): timer catched > unnamed (): counter 3 catched > timer (): timer catched > > On the console, it shows the expected output (except the "unnamed" issue): > > unnamed <type 'str'> > timer <type 'str'> > unnamed <type 'str'> > timer <type 'str'> > unnamed <type 'str'> > timer <type 'str'> > > I'm baffled on this one. I'm expecting the some QObjects in both the > console and the text edit for the first case, while the correct name()s for > the second.. > > Distribution: openSUSE 10.2, consisting of: > Python version: 2.5 > sip version: 4.2.1 > Qt version: 3.3.7 > PyQt version: 3.14.1 > > Could somebody in this kind audience shed some light on these issues, > please? (or is this simply due to the dusty versions..)
Dusty versions - I think. Phil _______________________________________________ PyQt mailing list PyQt@riverbankcomputing.com http://www.riverbankcomputing.com/mailman/listinfo/pyqt
