PyQt5 Retrieve Folder Directory and Set It in lineEdit - python-3.x

Question

Need some advice on how to retrieve the directory path for a selected folder and set it on the LineEdit.
I have the following simple GUI
If I clicked the toolButton (the button inside the red-circle), then a dialog window would pop up. Then we could navigate to select the desired folder. I wish that I could pass the path (in string) to the selected folder to the lineEdit box next to the button, once the user clicks Select Folder. However, I could not figure out how to do that. So far here is my code:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_TestQFileDialog(object):
def _open_file_dialog(self): # a function to open the dialog window
result = str(QtWidgets.QFileDialog.getExistingDirectory())
print(result)
return result
def setupUi(self, TestQFileDialog):
TestQFileDialog.setObjectName("TestQFileDialog")
TestQFileDialog.resize(240, 320)
self.toolButtonOpenDialog = QtWidgets.QToolButton(TestQFileDialog)
self.toolButtonOpenDialog.setGeometry(QtCore.QRect(210, 10, 25, 19))
self.toolButtonOpenDialog.setObjectName("toolButtonOpenDialog")
directory = self.toolButtonOpenDialog.clicked.connect(self._open_file_dialog)
self.lineEdit = QtWidgets.QLineEdit(TestQFileDialog)
self.lineEdit.setEnabled(False)
self.lineEdit.setGeometry(QtCore.QRect(10, 10, 191, 20))
self.lineEdit.setObjectName("lineEdit")
self.lineEdit.setText('{}'.format(directory))
self.retranslateUi(TestQFileDialog)
QtCore.QMetaObject.connectSlotsByName(TestQFileDialog)
def retranslateUi(self, TestQFileDialog):
_translate = QtCore.QCoreApplication.translate
TestQFileDialog.setWindowTitle(_translate("TestQFileDialog", "Dialog"))
self.toolButtonOpenDialog.setText(_translate("TestQFileDialog", "..."))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
TestQFileDialog = QtWidgets.QDialog()
ui = Ui_TestQFileDialog()
ui.setupUi(TestQFileDialog)
TestQFileDialog.show()
sys.exit(app.exec_())
Tried to include print in the _open_file_dialog function, and it printed the directory path. However, it was not returned and kept in the directory variable.
Any advice will be much appreciated.
Thanks and regards,
Arnold

Answer 1

Found the answer, the .setText method should be included in the _open_file_dialog function.
Therefore, the final code would look like this:
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_TestQFileDialog(object):
def _open_file_dialog(self):
directory = str(QtWidgets.QFileDialog.getExistingDirectory())
self.lineEdit.setText('{}'.format(directory))
def _set_text(self, text):
return text
def setupUi(self, TestQFileDialog):
TestQFileDialog.setObjectName("TestQFileDialog")
TestQFileDialog.resize(240, 320)
self.toolButtonOpenDialog = QtWidgets.QToolButton(TestQFileDialog)
self.toolButtonOpenDialog.setGeometry(QtCore.QRect(210, 10, 25, 19))
self.toolButtonOpenDialog.setObjectName("toolButtonOpenDialog")
self.toolButtonOpenDialog.clicked.connect(self._open_file_dialog)
self.lineEdit = QtWidgets.QLineEdit(TestQFileDialog)
self.lineEdit.setEnabled(False)
self.lineEdit.setGeometry(QtCore.QRect(10, 10, 191, 20))
self.lineEdit.setObjectName("lineEdit")
self.retranslateUi(TestQFileDialog)
QtCore.QMetaObject.connectSlotsByName(TestQFileDialog)
def retranslateUi(self, TestQFileDialog):
_translate = QtCore.QCoreApplication.translate
TestQFileDialog.setWindowTitle(_translate("TestQFileDialog", "Dialog"))
self.toolButtonOpenDialog.setText(_translate("TestQFileDialog", "..."))
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
TestQFileDialog = QtWidgets.QDialog()
ui = Ui_TestQFileDialog()
ui.setupUi(TestQFileDialog)
TestQFileDialog.show()
sys.exit(app.exec_())

Answer 2

With QWidget
from PyQt5.QtWidgets import QWidget, QFileDialog,QDialog,QToolButton,QLineEdit,QVBoxLayout ,QGridLayout
class Ui_TestQFileDialog(QWidget):
def __init__(self,parent=None) -> None:
super(Ui_TestQFileDialog,self).__init__(parent)
self.setupUi()
self.show()
def _open_file_dialog(self,lineeditr):
directory = str(QFileDialog.getExistingDirectory())
lineeditr.setText('{}'.format(directory))
def _open_file_dialog1(self):
directory = str(QFileDialog.getExistingDirectory())
self.lineEdit1.setText('{}'.format(directory))
def _set_text(self, text):
return text
def setupUi(self):
# ------------------------- first set ------------------------------------------------------
TestQFileDialog = QDialog()
# TestQFileDialog.setObjectName("TestQFileDialog")
# TestQFileDialog.resize(240, 320)
self.toolButtonOpenDialog = QToolButton(TestQFileDialog)
# self.toolButtonOpenDialog.setGeometry(QtCore.QRect(210, 10, 25, 19))
# self.toolButtonOpenDialog.setObjectName("toolButtonOpenDialog")
self.lineEdit = QLineEdit(TestQFileDialog)
self.lineEdit.setEnabled(False)
# self.lineEdit.setGeometry(QtCore.QRect(10, 10, 191, 20))
# self.lineEdit.setObjectName("lineEdit")
self.lineEdit.textChanged.connect(self.prine_la)
self.toolButtonOpenDialog.clicked.connect(lambda: (self._open_file_dialog(self.lineEdit)))
# ----------------------------- second set --------------------------------------------------------
TestQFileDialog1 = QDialog()
# TestQFileDialog1.setObjectName("TestQFileDialog")
# TestQFileDialog1.resize(240, 320)
self.toolButtonOpenDialog1 = QToolButton(TestQFileDialog1)
# self.toolButtonOpenDialog1.setGeometry(QtCore.QRect(210, 10, 25, 19))
# self.toolButtonOpenDialog1.setObjectName("toolButtonOpenDialog")
self.lineEdit1 = QLineEdit(TestQFileDialog1)
self.lineEdit1.setEnabled(False)
self.lineEdit1.setPlaceholderText("Enter the gain value in between 0.0 to 23.05934920")
# self.lineEdit1.setGeometry(QtCore.QRect(10, 10, 191, 20))
# self.lineEdit1.setObjectName("lineEdit1")
self.toolButtonOpenDialog1.clicked.connect(lambda: (self._open_file_dialog(self.lineEdit1)))
self.retranslateUi(TestQFileDialog,self.toolButtonOpenDialog,"TestQFileDialog","data")
self.retranslateUi(TestQFileDialog1,self.toolButtonOpenDialog1,"TestQFileDialog1","data1")
QtCore.QMetaObject.connectSlotsByName(TestQFileDialog)
QtCore.QMetaObject.connectSlotsByName(TestQFileDialog1)
grid_layout = QGridLayout()
grid_layout.addWidget(self.lineEdit,0,0)
grid_layout.addWidget(self.toolButtonOpenDialog,0,1)
grid_layout.addWidget(self.lineEdit1,1,0)
grid_layout.addWidget(self.toolButtonOpenDialog1,1,1)
ve_box= QVBoxLayout()
# ve_box.addWidget(self.lineEdit)
# ve_box.addWidget(self.toolButtonOpenDialog)
# ve_box.addWidget(self.lineEdit1)
# ve_box.addWidget(self.toolButtonOpenDialog1)
ve_box.addLayout(grid_layout)
self.setLayout(ve_box)
def prine_la(self):
print(self.lineEdit.text())
def retranslateUi(self, TestQFileDialog,tool,dialogue:str,d: str):
_translate = QtCore.QCoreApplication.translate
TestQFileDialog.setWindowTitle(_translate(dialogue, d))
tool.setText(_translate(dialogue, "..."))
print("ANR .S")
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
ui = Ui_TestQFileDialog()
sys.exit(app.exec_())