CODEWITHSUNDEEP
pythonpyqtsignals-slotsqtablewidgetqcombobox
sunwarr10r
sunwarr10r

Reputation: 4787

PyQt5: get index of cell widgets and their chosen values

I am using Python 3.5, and I have a simple code which creates a table with a few combo-boxes inside of it. Here is the code:

from PyQt5 import QtCore
from PyQt5 import QtWidgets
import sys

app = QtWidgets.QApplication(sys.argv)

########################## Create table ##############################
tableWidget = QtWidgets.QTableWidget()
tableWidget.setGeometry(QtCore.QRect(200, 200, 250, 300))
tableWidget.setColumnCount(2)
tableWidget.setRowCount(9)
tableWidget.show()

################# Create tablecontent & comboboxes ###################
names = ['Name 1', 'Name 2', 'Name 3', 'Name 4']
i = 0
for j in names:
    tableWidget.setItem(i, 0, QtWidgets.QTableWidgetItem(j))

    comboBox = QtWidgets.QComboBox()
    combo_option_list = ["Choose...", "Option 1", "Option 2", "Option 3", "Option 4"]
    for t in combo_option_list:
        comboBox.addItem(t)

    tableWidget.setCellWidget(i, 1, comboBox)
    i += 1

sys.exit(app.exec_())

I want to work with these combo-boxes, but I have several problems. It already starts with the fact that I can only use the last created combo-box with the following command:

comboBox.activated[str].connect(do_something)

I need to know the following things:

Upvotes: 2

Views: 4785

Answers (2)

ekhumoro
ekhumoro

Reputation: 120608

The tricky part here is getting the index of the combo-box within the table, because a cell-widget cannot know its own index. One way to solve this is to use the indexAt() method of the table, which can get an index from a QPoint. A cell-widget does know its own position relative to its parent, so this can be passed to indexAt() to get its index within the table.

Below is a simple demo that shows how to connect up the signals and get all the information that you want:

from PyQt5 import QtCore, QtWidgets

class Window(QtWidgets.QWidget):
    def __init__(self):
        super(Window, self).__init__()
        self.table = QtWidgets.QTableWidget(9, 2, self)
        layout = QtWidgets.QVBoxLayout(self)
        layout.addWidget(self.table)
        names = ['Name 1', 'Name 2', 'Name 3', 'Name 4']
        options = ["Choose...", "Option 1", "Option 2", "Option 3", "Option 4"]
        for index, name in enumerate(names):
            self.table.setItem(index, 0, QtWidgets.QTableWidgetItem(name))
            comboBox = QtWidgets.QComboBox()
            comboBox.activated.connect(self.comboActivated)
            comboBox.addItems(options)
            self.table.setCellWidget(index, 1, comboBox)

    def comboActivated(self, option):
        combo = self.sender()
        print('option: %s, "%s"' % (option, combo.itemText(option)))
        index = self.table.indexAt(combo.pos())
        print('row: %s, column: %s' % (index.row(), index.column()))

if __name__ == '__main__':

    import sys
    app = QtWidgets.QApplication(sys.argv)
    window = Window()
    window.setGeometry(600, 200, 300, 300)
    window.show()
    sys.exit(app.exec_())

Upvotes: 2

furas
furas

Reputation: 142651

Description below code

from PyQt5 import QtCore
from PyQt5 import QtWidgets
import sys

app = QtWidgets.QApplication(sys.argv)

########################## Create table ##############################

tableWidget = QtWidgets.QTableWidget()
tableWidget.setGeometry(QtCore.QRect(200, 200, 250, 300))
tableWidget.setColumnCount(2)
tableWidget.setRowCount(9)
tableWidget.show()

################# Create tablecontent & comboboxes ###################

def dosomething(index):
    widget = app.sender()
    print('widget object:', widget)
    print('widget myname:', widget.my_name)
    print('widget index:', combo_list.index(widget))
    print('option index:', index)

#---------------------------------------------------------------------

names = ['Name 1', 'Name 2', 'Name 3', 'Name 4']
combo_option_list = ["Choose...", "Option 1", "Option 2", "Option 3", "Option 4"]

combo_list = []

for i, name in enumerate(names):

    tableWidget.setItem(i, 0, QtWidgets.QTableWidgetItem(name))

    combobox = QtWidgets.QComboBox()
    combobox.addItems(combo_option_list)
    combobox.my_name = name + ' (i=' + str(i) + ')'
    combobox.currentIndexChanged.connect(dosomething)

    combo_list.append(combobox)

    tableWidget.setCellWidget(i, 1, combobox)

#---------------------------------------------------------------------

sys.exit(app.exec_())

Inside dosomething you can use app.sender() to get widget which was clicked - and then you can use it to do something with this widget.

PyQt executes dosomething with argument - it is index of selected option in combobox.

To get index of widget in combo_list you can use standard list method combo_list.index(widget)

But you can also create own variable in combobox (ie. my_name) to keep index or other value

combobox.my_name = some_value

and later you can get in dosomething

value = widget.my_name

BTW:

instead of addItem(one_option) and for loop you can use addItems(option_list)

You can use enumerate(names) and you will not need i = 0 and i += 1

for i, j in enumerate(names):

You can create combo_option_list before for loop.

Upvotes: 2

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