[Tutor] Basic QT query

[Dave S]

Hi all,

I am trying to get to grips with QT, putting a friendly face on some of my 
apps :) Its early days and my first attempt but I expected the following to 
print 'hi it works' every second. 

There problem I am stuck with is ...

The debugged program raised the exception unhandled RuntimeError
"underlying C/C++ object has been deleted" At line 24 

ie "self.timer = self.startTimer(1000)". First of all I did not have an 
assignment ie I just had "self.startTimer(1000)" realising Python would 
garbage collect I added an assignment but still the same problem.

Also I am struggling with "QObject.connect(self.tickerevent, 
PYSIGNAL("ticker"), self.hello)" I am unsure of what the source of the 
connect is - I suspect my guess of self.tickerevent is wrong. The source of 
the event should be PYSIGNAL("ticker") ?

Any ideas or suggestions much appreciated

Cheers

Dave

** MY QT MASTERPIECE :) **


import sys
from qt import *
from frm_livedata import frm


class Ticker(QObject):

	def __init__(self):
		QObject.__init__, (self)
		self.timer = self.startTimer(1000)
		
	def timerEvent(self, ev):
		self.emit(PYSIGNAL("ticker")())
		QObject.connect(self.tickerevent, PYSIGNAL("ticker"), self.hello)

	def hello():
		print 'hi it works'
	
x=Ticker()

if __name__ == '__main__':

	app = QApplication(sys.argv)
	win = frm()
	app.setMainWidget(win)
	win.show()
	QObject.connect(app, SIGNAL('lastWindowClosed()'),app, SLOT('quit()'))
	app.exec_loop()