Connect(self.method) does not emit a signal, but (lambda: self.method()) does?

Alabaster

Suddenly my QPushButtons (which used to work perfectly) have decided not to emit signals (either that or their signals are not connecting properly?). I can't figure out what I changed which caused it to "break."

I have found that the buttons do emit a signal when I use: button.clicked.connect(lambda: self.method()) -- but when I use button.clicked(self.method) there is no response. (Unfortunately using the lambda version breaks a lot of my remaining code which relies on self.sender()).

Here is how this portion of my script is structured:

My Central Widget has a grid layout (self.grid). I populate the grid with several rows of (dynamically generated) buttons & widgets. Each row is its own instance of my class EntryRow(QWidget).

Here is the relevant method of my Central Widget:

@
def populateMainContent(self):

    self.getPageSettings()
    for index, thingy in enumerate(self.dummyData.dataDict[self.selectedThingies]):
        rowNum = index
        
 newRow = EntryRow(thingy, self.dummyData, self.grid, rowNum)

        mainWidgets = newRow.createMainWidgets()
        pageWidgets = newRow.createPageWidgets(self.selectedWidgets)

        widgetsToShow = mainWidgets + pageWidgets

        newRow.displayWidgets(widgetsToShow)@

And here is my class EntryRow(QWidget) :

@
class EntryRow(QWidget):
def init(self, name, dummyData, grid, rowNum):
super().init()

    self.name = name
    self.widgetList = {"Main" : [],
                       "theseWidgets" : [],
                       "noIMeanThoseWidgets" : []
                       }
    self.grid = grid
    self.rowNum = rowNum
    self.dummyData = dummyData

def createMainWidgets(self):
    self.nameLabel = QLabel(self.name)
    self.widgetList["Main"].append(self.nameLabel)
    return self.widgetList["Main"]

def createPageWidgets(self, selectedWidgets):
    for widName in self.dummyData.widgetDict[selectedWidgets]:
        if "Button" in widName:
            newWidget = QPushButton(widName)

newWidget.setCheckable(True)
elif "Check" in widName:
newWidget = QCheckBox(widName)

 ###########################################################
        newWidget.clicked.connect(self.method)  ## DOES NOT SEEM TO EMIT A SIGNAL
 ##########################################################
 #newWidget.clicked.connect(lambda: self.method())  # THIS DOES EMIT A SIGNAL
 ##########################################################

        self.widgetList[selectedWidgets].append(newWidget)
    return self.widgetList[selectedWidgets]

def displayWidgets(self, widgetsToShow):
    for index, wid in enumerate(widgetsToShow):
        colNum = index
        self.grid.addWidget(wid, self.rowNum, colNum )

def method(self):
    print("Signal received")

@

Any help would be appreciated. I assume it's a problem of parentage or layout?

Thanks

jazzycamel

Try decorating the slot as follows:

@
...
@QtCore.Slot
def method(self):
print("Signal received")
...
@

Hope this helps ;o)