將lineEdit值設置為另一個類中的標簽（Pyqt4）
[英]Set lineEdit value to a label in an another class (Pyqt4)
問題描述
我是Qt的新手，想將entry / lineEdit字段值設置為Label，該Label在另一個類中定義的另一個框架中可用：
from PyQt4 import QtCore, QtGui
import time
from PyQt4.QtCore import SIGNAL
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_Dialog1(object):
def setupUi(self, Dialog):
self.frame = QtGui.QFrame(Dialog)
self.frame.setGeometry(QtCore.QRect(40, 20, 311, 391))
self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame.setFrameShadow(QtGui.QFrame.Raised)
self.frame.setObjectName(_fromUtf8("frame"))
self.label = QtGui.QLabel(self.frame)
self.label.setGeometry(QtCore.QRect(120, 180, 72, 23))
self.label.setObjectName(_fromUtf8("label"))
self.label.setText(_translate("Dialog", "omniOS", None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Ui_Dialog2(object):
def setupUi(self, Dialog):
self.frame_2 = QtGui.QFrame(Dialog)
self.frame_2.setGeometry(QtCore.QRect(30, 30, 311, 391))
self.frame_2.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame_2.setFrameShadow(QtGui.QFrame.Raised)
self.frame_2.setObjectName(_fromUtf8("frame_2"))
self.label_2 = QtGui.QLabel(self.frame_2)
self.label_2.setGeometry(QtCore.QRect(50, 230, 72, 31))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.lineEdit = QtGui.QLineEdit(self.frame_2)
self.lineEdit.setGeometry(QtCore.QRect(150, 230, 113, 33))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.label_2.setText(_translate("Dialog", "Login", None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
self.retranslateUi(Dialog)
self.pb = QtGui.QPushButton(self.frame_2)
self.pb.setObjectName(_fromUtf8("login"))
self.pb.setText("Login")
self.connect(self.pb, SIGNAL("clicked()"), self.button_click)
def button_click(self):
# shost is a QString object
text = self.lineEdit.text()
print (text)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Ui_Dialog3(object):
def setupUi(self, Dialog):
self.frame_3 = QtGui.QFrame(Dialog)
self.frame_3.setGeometry(QtCore.QRect(30, 30, 311, 391))
self.frame_3.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame_3.setFrameShadow(QtGui.QFrame.Raised)
self.frame_3.setObjectName(_fromUtf8("frame_3"))
self.label_3 = QtGui.QLabel(self.frame_3)
self.label_3.setGeometry(QtCore.QRect(50, 230, 72, 31))
self.label_3.setObjectName(_fromUtf8("label_3"))
self.label_4 = QtGui.QLabel(self.frame_3)
self.label_4.setGeometry(QtCore.QRect(150, 230, 113, 33))
self.label_4.setObjectName(_fromUtf8("label_4"))
self.label_3.setText(_translate("Dialog", "Email", None))
self.label_4.setText(_translate("Dialog", text, None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
self.retranslateUi(Dialog)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Dialog1(QtGui.QDialog, Ui_Dialog1):
def __init__(self, parent=None):
super(Dialog1, self).__init__(parent)
self.setupUi(self)
class Dialog2(QtGui.QDialog, Ui_Dialog2):
def __init__(self, parent=None):
super(Dialog2, self).__init__(parent)
self.setupUi(self)
class Dialog3(QtGui.QDialog, Ui_Dialog3):
def __init__(self, parent=None):
super(Dialog3, self).__init__(parent)
self.setupUi(self)
if __name__=="__main__":
import sys
a = QtGui.QApplication(sys.argv)
w1 = Dialog1()
w2 = Dialog2()
w3 = Dialog3()
def on_timeout():
w1.hide()
w2.show()
def on_timeout1():
w2.hide()
w3.show()
w1.show()
QtCore.QTimer.singleShot(3000, on_timeout)
QtCore.QTimer.singleShot(6000, on_timeout1)
sys.exit(a.exec_())
我需要做的是設置lineEdit （類Dialog2 ）由用戶輸入的值label_4 （類Dialog3 ）：
def button_click(self):
# shost is a QString object
text = self.lineEdit.text()
print (text)
問題：用戶輸入電子郵件后，如何更新Dialog3.label_4 ？
2 個解決方案
解決方案1
2 已采納 2018-10-11 10:00:38
更改“ on_timeout1”功能
def on_timeout1():
w2.hide()
w3.show()
w3.label_4.setText(w2.lineEdit.text())
解決方案2
1 2018-10-11 10:03:00
您的代碼的問題在於，您需要以某種方式將對話框2與對話框3“通信”。對於這種簡單的情況，我建議您執行以下操作：
- 修改的構造
Dialog2采取作為輸入的一個實例的引用Dialog3。 - 在
Dialog2.button_clicked方法更新的實例Dialog3和隱藏當前Dialog2實例。 - 更改
"__main__"部分的登錄名：顯示w1和w2但將w3傳遞給構造函數中的w2（因此必須首先創建w3），省去第二個計時器。
下面是我上面描述的完整實現。 但是，我最后要指出，UI元素之間的這種“交流”是一個更為微妙和復雜的話題。 因此，如果您打算進行認真的UI開發，我建議您開始閱讀有關Model-View-Controller模式的信息，例如在這里 。
from PyQt4 import QtCore, QtGui
import time
from PyQt4.QtCore import SIGNAL
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_Dialog1(object):
def setupUi(self, Dialog):
self.frame = QtGui.QFrame(Dialog)
self.frame.setGeometry(QtCore.QRect(40, 20, 311, 391))
self.frame.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame.setFrameShadow(QtGui.QFrame.Raised)
self.frame.setObjectName(_fromUtf8("frame"))
self.label = QtGui.QLabel(self.frame)
self.label.setGeometry(QtCore.QRect(120, 180, 72, 23))
self.label.setObjectName(_fromUtf8("label"))
self.label.setText(_translate("Dialog", "omniOS", None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Ui_Dialog2(object):
def setupUi(self, Dialog):
self.frame_2 = QtGui.QFrame(Dialog)
self.frame_2.setGeometry(QtCore.QRect(30, 30, 311, 391))
self.frame_2.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame_2.setFrameShadow(QtGui.QFrame.Raised)
self.frame_2.setObjectName(_fromUtf8("frame_2"))
self.label_2 = QtGui.QLabel(self.frame_2)
self.label_2.setGeometry(QtCore.QRect(50, 230, 72, 31))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.lineEdit = QtGui.QLineEdit(self.frame_2)
self.lineEdit.setGeometry(QtCore.QRect(150, 230, 113, 33))
self.lineEdit.setObjectName(_fromUtf8("lineEdit"))
self.label_2.setText(_translate("Dialog", "Login", None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
self.retranslateUi(Dialog)
self.pb = QtGui.QPushButton(self.frame_2)
self.pb.setObjectName(_fromUtf8("login"))
self.pb.setText("Login")
self.connect(self.pb, SIGNAL("clicked()"), self.button_click)
def button_click(self):
text = self.lineEdit.text()
self.w3.label_4.setText(text)
self.w3.show()
self.hide()
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Ui_Dialog3(object):
def setupUi(self, Dialog):
self.frame_3 = QtGui.QFrame(Dialog)
self.frame_3.setGeometry(QtCore.QRect(30, 30, 311, 391))
self.frame_3.setFrameShape(QtGui.QFrame.StyledPanel)
self.frame_3.setFrameShadow(QtGui.QFrame.Raised)
self.frame_3.setObjectName(_fromUtf8("frame_3"))
self.label_3 = QtGui.QLabel(self.frame_3)
self.label_3.setGeometry(QtCore.QRect(50, 230, 72, 31))
self.label_3.setObjectName(_fromUtf8("label_3"))
self.label_4 = QtGui.QLabel(self.frame_3)
self.label_4.setGeometry(QtCore.QRect(150, 230, 113, 33))
self.label_4.setObjectName(_fromUtf8("label_4"))
self.label_3.setText(_translate("Dialog", "Email", None))
Dialog.setObjectName(_fromUtf8("Dialog"))
Dialog.resize(391, 437)
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
self.retranslateUi(Dialog)
def retranslateUi(self, Dialog):
Dialog.setWindowTitle(_translate("Dialog", "OmniOS", None))
class Dialog1(QtGui.QDialog, Ui_Dialog1):
def __init__(self, parent=None):
super(Dialog1, self).__init__(parent)
self.setupUi(self)
class Dialog2(QtGui.QDialog, Ui_Dialog2):
def __init__(self, w3, parent=None):
super(Dialog2, self).__init__(parent)
self.setupUi(self)
self.w3 = w3
class Dialog3(QtGui.QDialog, Ui_Dialog3):
def __init__(self, parent=None):
super(Dialog3, self).__init__(parent)
self.setupUi(self)
if __name__=="__main__":
import sys
a = QtGui.QApplication(sys.argv)
w1 = Dialog1()
w3 = Dialog3()
w2 = Dialog2(w3)
def on_timeout():
w1.hide()
w2.show()
w1.show()
QtCore.QTimer.singleShot(3000, on_timeout)
sys.exit(a.exec_())
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