Q Table Widget issues emitting signal when data has been changed

[Benjam901]

Hello all,

I am having a bit of trouble with my QTableWidget. When you double click and edit a text field inside the QTableWidget I need a signal to be emitted when enter is pressed/when the data in the table has actually changed.

My test case is self.uiMainWindow.uiExtensionTable

I have tried testcase.cellChanged, testcase.dataChanged and also something like this:

self.connect(self.uiMainWindow.uiUnitExtensionTable, QtCore.SIGNAL(self.uiMainWindow.uiUnitExtensionTable.itemChanged(self.uiMainWindow.uiUnitExtensionTable.currentItem)), self.testPrint) # Gives me native Qt signal is not callable Error

But I have have had no luck so far

cellChanged seems to be the closest I have gotten so far but it activates when I double click the item rather than when I have finished editing the text field.

Any help would be much appreciated :)

Cheers,

Ben

[Marcus Ottosson]

Spontaneously, I’d adjust the old-style signal connection with the new-style method of connecting, maybe that will make things a little more clear what’s going on.

self.uiMainWindow.uiUnitExtensionTable.itemChanged.connect(self.testPrint)

Wasn’t sure about how to convert the other arguments, but this self.uiMainWindow.uiUnitExtensionTable.itemChanged is a signal that you are attempting to call directly, and is why you’re getting the error. If you’re looking to emit the arguments with it, you’ll need to pass them to .emit() instead.

self.uiMainWindow.uiUnitExtensionTable.itemChanged.emit(self.uiMainWindow.uiUnitExtensionTable.currentItem)

See here about old-style versus new-style.

• http://pyqt.sourceforge.net/Docs/PyQt4/new_style_signals_slots.html

​

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Marcus Ottosson
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[Ben Hearn]

Hello Marcus,

Thank you for your reply I have changed my signals and have set up a function that tests for current data vs old data only when the table has been populated.

Thank you for the help. For anyone who has a similar issue I have left my test function below. Test cases seem to be working so far

self.uiMainWindow.uiUnitExtensionTable.itemDoubleClicked.connect(self.testData)
self.uiMainWindow.uiUnitExtensionTable.itemChanged.connect(self.testPrint)

def testPrint(self):
	try:
		self.newData = self.uiMainWindow.uiUnitExtensionTable.currentItem().text()
		row = self.uiMainWindow.uiUnitExtensionTable.currentItem().row()
		print self.uiMainWindow.uiUnitExtensionTable.verticalHeaderItem(row).text()
		print "Item changed"
 
		if self.newData != self.currentData:
			print "Old data", self.currentData
			print "New data", self.newData
		else:
			print "No new data", self.currentData
	except:
		pass
 
def testData(self):
	try:
		print "cell entered"
		self.currentData = self.uiMainWindow.uiUnitExtensionTable.currentItem().text()
	except:
		pass

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[n.va...@gmail.com]

i am searching this solution on whole internet, finally found, phew