如何删除 PyQt5 中 QGroupBox 中的所有小部件?
How to remove all widgets within a QGroupBox in PyQt5?
在我的程序中有一个 QGroupBox
显示,其中有许多 QPushButton
。在程序执行期间,用户可以单击 QGroupBox
之外的按钮,其中的所有按钮将被删除或隐藏。问题是我似乎找不到直接对按钮或通过清除 QGroupBox
来执行此操作的方法。
我已经尝试 deleteLater
按钮,但没有用。然后我尝试清除 QGroupBox
的 layout
但这也没有用。这是我刚写的一些代码,有同样的问题:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def addButtons(self,looping):
# Code to remove the previous QPushButton's goes here.
placement = -100
for i in range(looping):
currentName = 'btn' + str(i)
placement = placement + 110
self.btnB = QtWidgets.QPushButton(self.groupBox)
self.btnB.setGeometry(QtCore.QRect(10+placement, 30+placement, 100, 100))
self.btnB.show()
self.btnB.setObjectName(currentName)
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.btnA.clicked.connect(self.pushed)
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def pushed(self):
unkownLength = random.randint(1,20)
self.addButtons(unkownLength)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = UI_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
这里有些东西可能没有意义,例如 window 大小、多个函数调用或它是对话框 window 而不是 QMainWindow。但是,在实际程序的上下文中,它们确实有意义,所以请忽略它,我知道它效率低下。 unkownLength
变量的全部意义在于模拟在实际程序中,生成的按钮数量将由用户输入决定。按钮也不能一开始就在那里,这就是为什么它们是通过单击按钮创建的。再次单击该按钮时,它应该删除或隐藏它之前创建的所有按钮。有什么想法吗?
利用按钮是 QGroupBox
的子按钮,我们可以使用 findChildren()
获取按钮以使用 deleteLater()
:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
class Dialog(QtWidgets.QDialog, UI_Dialog):
def __init__(self, parent=None):
super(Dialog, self).__init__(parent)
self.setupUi(self)
self.btnA.clicked.connect(self.pushed)
@QtCore.pyqtSlot()
def pushed(self):
unkownLength = random.randint(1, 20)
self.addButtons(unkownLength)
def addButtons(self, looping):
for button in self.groupBox.findChildren(QtWidgets.QPushButton):
button.deleteLater()
placement = -100
pos = QtCore.QPoint(20, 40)
for i in range(looping):
currentName = "btn" + str(i)
self.btnB = QtWidgets.QPushButton(
self.groupBox, objectName=currentName
)
self.btnB.setGeometry(QtCore.QRect(pos, QtCore.QSize(100, 100)))
pos += QtCore.QPoint(110, 110)
self.btnB.show()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Dialog()
w.show()
sys.exit(app.exec_())
在我的程序中有一个 QGroupBox
显示,其中有许多 QPushButton
。在程序执行期间,用户可以单击 QGroupBox
之外的按钮,其中的所有按钮将被删除或隐藏。问题是我似乎找不到直接对按钮或通过清除 QGroupBox
来执行此操作的方法。
我已经尝试 deleteLater
按钮,但没有用。然后我尝试清除 QGroupBox
的 layout
但这也没有用。这是我刚写的一些代码,有同样的问题:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def addButtons(self,looping):
# Code to remove the previous QPushButton's goes here.
placement = -100
for i in range(looping):
currentName = 'btn' + str(i)
placement = placement + 110
self.btnB = QtWidgets.QPushButton(self.groupBox)
self.btnB.setGeometry(QtCore.QRect(10+placement, 30+placement, 100, 100))
self.btnB.show()
self.btnB.setObjectName(currentName)
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.btnA.clicked.connect(self.pushed)
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def pushed(self):
unkownLength = random.randint(1,20)
self.addButtons(unkownLength)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = UI_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())
这里有些东西可能没有意义,例如 window 大小、多个函数调用或它是对话框 window 而不是 QMainWindow。但是,在实际程序的上下文中,它们确实有意义,所以请忽略它,我知道它效率低下。 unkownLength
变量的全部意义在于模拟在实际程序中,生成的按钮数量将由用户输入决定。按钮也不能一开始就在那里,这就是为什么它们是通过单击按钮创建的。再次单击该按钮时,它应该删除或隐藏它之前创建的所有按钮。有什么想法吗?
利用按钮是 QGroupBox
的子按钮,我们可以使用 findChildren()
获取按钮以使用 deleteLater()
:
from PyQt5 import QtCore, QtGui, QtWidgets
import sys
import random
class UI_Dialog(object):
def setupUi(self, Dialog):
Dialog.setObjectName("Dialog")
Dialog.resize(1300, 800)
self.btnA = QtWidgets.QPushButton(Dialog)
self.btnA.setGeometry(QtCore.QRect(10, 80, 101, 131))
self.btnA.setObjectName("btn1")
self.formLayout = QtWidgets.QFormLayout()
self.groupBox = QtWidgets.QGroupBox("Results")
self.groupBox.setLayout(self.formLayout)
self.resultScrollArea = QtWidgets.QScrollArea(Dialog)
self.resultScrollArea.setWidget(self.groupBox)
self.resultScrollArea.setGeometry(QtCore.QRect(20, 220, 1011, 531))
self.resultScrollArea.setWidgetResizable(True)
self.resultScrollArea.setObjectName("resultScrollArea")
self.retranslateUi(Dialog)
QtCore.QMetaObject.connectSlotsByName(Dialog)
def retranslateUi(self, Dialog):
_translate = QtCore.QCoreApplication.translate
Dialog.setWindowTitle(_translate("Dialog", "Example Program"))
self.btnA.setText(_translate("Dialog", "Push Button"))
class Dialog(QtWidgets.QDialog, UI_Dialog):
def __init__(self, parent=None):
super(Dialog, self).__init__(parent)
self.setupUi(self)
self.btnA.clicked.connect(self.pushed)
@QtCore.pyqtSlot()
def pushed(self):
unkownLength = random.randint(1, 20)
self.addButtons(unkownLength)
def addButtons(self, looping):
for button in self.groupBox.findChildren(QtWidgets.QPushButton):
button.deleteLater()
placement = -100
pos = QtCore.QPoint(20, 40)
for i in range(looping):
currentName = "btn" + str(i)
self.btnB = QtWidgets.QPushButton(
self.groupBox, objectName=currentName
)
self.btnB.setGeometry(QtCore.QRect(pos, QtCore.QSize(100, 100)))
pos += QtCore.QPoint(110, 110)
self.btnB.show()
if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
w = Dialog()
w.show()
sys.exit(app.exec_())