Question

I am a Python and Qt newbie…

I am working on a GUI program that shows a list of data using QTableWidget at the beginning.

The rows are inserted into the table using the setItem() method. They are QTableWidgetItem objects.

Now I want to allow users to click-select a certain row (the QTableWidgetItem), and my program will populate a secondary QTableWidget.

I have learnt that there is a thing called Signal and Slot. Am I going to use that?
There are also examples of using installEventFilter(), but it is not appropiate for the QTableWidgetItem.

Answer 1

The easiest way for this would just be to use the itemClicked-signal of the QTableWidget:

def handle_item_clicked(tableItem):
    #the callback, called when an item is clicked, with the item as an argument
    #populate the secondary table in some way

#register the callback with the QTableWidget
yourTableWidget.itemClicked.connect(handle_item_clicked)

You could also use the currentItemChanged signal which gives you the current and previous selection (e.g. so you can clear or hide your secondary widget if the user deselects an item, in which case the current item will be None).