[英]PyQt5 - show a string from notepad to a QLineEdit
如何将全名(来自记事本用户;通过;全名)显示在第二个类(也是第二个GUI)的Qlineedit小部件上
头等舱
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_())
第二类
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_())
这是QlineEdit,其对象名称是第二个gui中的usershowname_line:
您必须创建一个可以发送字符串的信号(pyqtSignal(str)),该字符串将在关闭窗口之前发出。 为了显示它,我们必须将它连接到QLineEdit的setText(在您的情况下,它用QLineEdit的名称替换your_lineedit)。 以下部分显示了以上所有内容:
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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