How to determine who emitted the signal?
I think that I opened a question too early, because I found an answer on google by myself. When slot is activated by emitter, the pointer of emitter stored, and can be retrieved by
QObject::sender()
and as a result can be accessed in PyQt by:
@QtCore.pyqtSlot()
def someSlot(self):
self.sender()
You might want to look into the QSignalMapper class, as it provides a means to associate either an int, string, or widget paramters to an object that sends a given signal. The main limitation is that the signal/slot being mapped needs to be parameter-less.
C++ example from the QT4.7 documentation:
ButtonWidget::ButtonWidget(QStringList texts, QWidget *parent)
: QWidget(parent)
{
signalMapper = new QSignalMapper(this);
QGridLayout *gridLayout = new QGridLayout;
for (int i = 0; i < texts.size(); ++i) {
QPushButton *button = new QPushButton(texts[i]);
connect(button, SIGNAL(clicked()), signalMapper, SLOT(map()));
signalMapper->setMapping(button, texts[i]);
gridLayout->addWidget(button, i / 3, i % 3);
}
connect(signalMapper, SIGNAL(mapped(const QString &)),
this, SIGNAL(clicked(const QString &)));
setLayout(gridLayout);
}
You can find a PyQT4 example here, however when I have a chance I'll try to add a simple PyQT4 example.