CODEWITHSUNDEEP
pythonc++qtuser-interfaceqt-designer
kaycee
kaycee

Reputation: 921

Pass arguments to slot function built by QT Designer

I'm new to GUI designing and I started working with QT Designer 4.8.6. I'm connecting buttons to function using the signals-slots mechanism.

Here is some connections generated by the pyuic4 util to create the GUI script:

QtCore.QObject.connect(self.btn_add_codes, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.sel_codes_file)
QtCore.QObject.connect(self.btn_add_xls, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.sel_excel_file)

The associated functions in my main python file (path_codes and path_excel are QLineEdit widgets):

class MainDialog(QtGui.QMainWindow, gui_v1.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainDialog, self).__init__(parent)
        self.setupUi(self)

    def sel_codes_file(self):
        self.path_codes.setText(QtGui.QFileDialog.getOpenFileName())

    def sel_excel_file(self):
        self.path_excel.setText(QtGui.QFileDialog.getOpenFileName())

I want to use a generic function for all the buttons which actions is to search for a file and show the path in a LineEdit widget. I added this function to my MainDialog class:

def select_file(self, textbox):
        self.textbox.setText(QtGui.QFileDialog.getOpenFileName())

I modified the connection to: 

QtCore.QObject.connect(self.btn_add_codes, QtCore.SIGNAL(_fromUtf8("clicked()")), MainWindow.select_file(textbox=self.path_codes)

It's not working. The main window does not show with this code and I'm getting this error: AttributeError: 'MainDialog' object has no attribute 'textbox'

Is it possible to pass arguments to slots connection functions ? If so, what am I doing wrong ? Thanks !

Upvotes: 1

Views: 449

Answers (1)

x squared
x squared

Reputation: 3354

Does this lambda work? At least that's how I do it with Qt when using C++.

self.btn_add_codes.clicked.connect(lambda codes=self.path_codes: MainWindow.select_file(codes))

Upvotes: 1

Related Questions