select plot in guiqwt widget in qt4 interface

[laurent gadea]

hi everybody
i develop an interface with Qt4 in which there are tableWidget listWidget
and guiqwtplot interconnected
my problem is : i want implement a button that remove a plot in guiqwtplot
widget when it has selected. it's reverse action of add button that i
implemented yet

i use a connect like this
QtCore.QObject.connect(xx,QtCore.SIGNAL("sg.SIG_ITEM_SELECTION_CHANGED()"),self.remove)
but i don't know what king of object xx is necessary to spend a signal and
i'm not sure about Signal
i didn(t found anything example in web to illustrate that

which is the object go of signal widget , plot or curve.

thanks for our help