CODEWITHSUNDEEP
pythonpyqt5
Erik Thysell
Erik Thysell

Reputation: 1352

PYQT5 connect a change in QtWidgets.QDoubleSpinBox

I am trying to find out howto connect a change in QtWidgets.QDoubleSpinBox in using pyqt5 in python to a method. AFAICS QtWidgets.QDoubleSpinBox.valueChanged does not have a connect function anymore (as in PYQT4).

I have tried to search for an answer but I just cant seem to find out how to accomplish this...

Anyone who knows?

EDIT1> Thanks for the reply but I cant see the difference to this:

thanks for your reply, but I cant see the difference to this 

self.dsbGR = QtWidgets.QDoubleSpinBox(self.centralwidget)
self.dsbGR.setDecimals(3)
self.dsbGR.setSingleStep(0.1)
self.dsbGR.setProperty("value", 3.0)
self.dsbGR.setObjectName("dsbGR")
self.dsbGR.valueChanged.connect(myfunction)

The last line does not work, there is no connectmethod.

Upvotes: 0

Views: 1418

Answers (1)

eyllanesc
eyllanesc

Reputation: 243887

I think the problem is that you are not using the new style of signal and slots connection, in the following example I show its use with the widget QDoubleSpinBox.

from PyQt5 import QtCore, QtGui, QtWidgets


class MainWindow(QtWidgets.QMainWindow):
    def __init__(self, parent=None):
        QtWidgets.QMainWindow.__init__(self, parent)
        self.centralwidget = QtWidgets.QWidget(self)
        self.setCentralWidget(self.centralwidget)
        self.centralWidget().setLayout(QtWidgets.QVBoxLayout())


        self.dsbGR = QtWidgets.QDoubleSpinBox(self.centralwidget)
        self.dsbGR.setDecimals(3)
        self.dsbGR.setSingleStep(0.1)
        self.dsbGR.setProperty("value", 3.0)
        self.dsbGR.setObjectName("dsbGR")
        self.dsbGR.valueChanged.connect(self.onValueChanged)
        self.centralWidget().layout().addWidget(self.dsbGR)

    def onValueChanged(self, val):
        print(val)

if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    w = MainWindow()
    w.show()
    sys.exit(app.exec_())

Upvotes: 1

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