[英]PyQt5 - show a string from notepad to a QLineEdit
如何將全名(來自記事本用戶;通過;全名)顯示在第二個類(也是第二個GUI)的Qlineedit小部件上
頭等艙
from inventoryform import InventoryDialog
class LoginDialog(QtWidgets.QDialog, Ui_loginform):
isLogged = QtCore.pyqtSignal()
def __init__(self, parent=None):
def login_button_clicked(self):
import csv
with open('user.txt', newline='') as f:
reader = csv.reader(f, delimiter=';')
for line in reader:
us, pa, fn = line
if self.username_line.text() == us and self.password_line.text() == pa:
QtWidgets.QMessageBox.information(self, "LOGIN", "LOGIN SUCCESSFUL!")
self.isLogged.emit()
a = QLineEdit()
a.setText(fn)
usershowname_line.append(a)
self.close()
return
else:
QtWidgets.QMessageBox.information(self, "LOGIN FAILED", "LOGIN FAILED!")
def exit_button_clicked(self):
self.close()
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
loginform_window = LoginDialog()
x = InventoryDialog()
loginform_window.isLogged.connect(x.show)
x.isLogout.connect(loginform_window.show)
loginform_window.show()
sys.exit(app.exec_())
第二類
class InventoryDialog(QtWidgets.QDialog, Ui_inventoryform):
isLogout = QtCore.pyqtSignal()
def __init__(self, parent=None):
QtWidgets.QDialog.__init__(self, parent)
self.setupUi(self)
self.signout_button.clicked.connect(self.onSignout_button)
def onSignout_button(self):
self.isLogout.emit()
self.close()
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
inventoryform_window = InventoryDialog()
inventoryform_window.show()
sys.exit(app.exec_())
這是QlineEdit,其對象名稱是第二個gui中的usershowname_line:
您必須創建一個可以發送字符串的信號(pyqtSignal(str)),該字符串將在關閉窗口之前發出。 為了顯示它,我們必須將它連接到QLineEdit的setText(在您的情況下,它用QLineEdit的名稱替換your_lineedit)。 以下部分顯示了以上所有內容:
class LoginDialog(QtWidgets.QDialog, Ui_loginform):
isLogged = QtCore.pyqtSignal()
dataSignal = QtCore.pyqtSignal(str)
[...]
def login_button_clicked(self):
[...]
self.dataSignal.emit("user: {}, pass: {}, fullname: {}".format(us, pa, fn))
self.isLogged.emit()
[...]
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
loginform_window = LoginDialog()
x = InventoryDialog()
loginform_window.isLogged.connect(x.show)
loginform_window.dataSignal.connect(x.your_lineedit.setText)
# ^^^^^^^^^^^^^
x.isLogout.connect(loginform_window.show)
loginform_window.show()
sys.exit(app.exec_())
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