我试图在QHBoxLayout中显示/消除一些小部件，这取决于QCheckBox的信号变化。
我已阅读了一些文章（PyQt How to remove a layout from a layout; pyqt: how to remove a widget?）如何删除布局/小部件，但仍无法修改代码以使其正常工作。
首次单击QHBoxLayouts中的新窗口小部件后，但在另一次单击（取消选中按钮）后，它根本不起作用，并且这些不会消失。在第三次点击它崩溃。
以下是我的代码片段：
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys
class CheckableComboBox(QComboBox):
def __init__(self, parent = None):
super(CheckableComboBox, self).__init__(parent)
self.view().pressed.connect(self.handleItemPressed)
self.setModel(QStandardItemModel(self))
self.setStyleSheet("QComboBox{"
"font-size:11px;"
"color:black;"
"background-color:white;"
"border:1px solid black;"
"padding:1px;""}")
self.setEditable(True)
self.lineEdit().setAlignment(Qt.AlignCenter)
self.lineEdit().setReadOnly(True)
self.setMinimumSize(200,40)
def handleItemPressed(self, index):
item = self.model().itemFromIndex(index)
if item.text() != ' ' and item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
if item.text() != ' ' and item.checkState() != Qt.Checked:
item.setCheckState(Qt.Checked)
class Main(QWidget):
def __init__(self, parent = None):
super(Main, self).__init__(parent)
self.years = [' ', '2017', '2018', '2019', '2020']
self.months = [' ', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12']
self.metrics = [' ', 'Seller', 'Section', 'Store']
self.units = [' ', 'Number of Pieces Sold', 'Total Value']
self.setWindowTitle('Dialog')
self.resize(360, 200)
self.sMetric = QLabel('Select metric(s):')
self.sUnit = QLabel('Select unit(s):')
self.sYear = QLabel('Select year(s):')
self.sMonth = QLabel('Select month(s):')
self.timeWise = QCheckBox('Time-wise Overview')
self.timeWise.stateChanged.connect(self.on_checked)
self.okButton = QPushButton('Ok')
self.cancelButton = QPushButton('Cancel')
self.metricCombo = CheckableComboBox()
for index, element in enumerate(self.metrics):
self.metricCombo.addItem(element)
if index > 0:
item = self.metricCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.unitCombo = CheckableComboBox()
for index, element in enumerate(self.units):
self.unitCombo.addItem(element)
if index > 0:
item = self.unitCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.monthCombo = CheckableComboBox()
for index, element in enumerate(self.months):
self.monthCombo.addItem(element)
if index > 0:
item = self.monthCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.yearCombo = CheckableComboBox()
for index, element in enumerate(self.years):
self.yearCombo.addItem(element)
if index > 0:
item = self.yearCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.firstR = QHBoxLayout()
self.firstR.addWidget(self.sMetric)
self.firstR.addWidget(self.metricCombo)
self.secondR = QHBoxLayout()
self.secondR.addWidget(self.sUnit)
self.secondR.addWidget(self.unitCombo)
self.thirdR = QHBoxLayout()
self.thirdR.addWidget(self.timeWise)
self.fourthR = QHBoxLayout()
self.fourthR.addWidget(self.sYear)
self.fourthR.addWidget(self.yearCombo)
self.fifthR = QHBoxLayout()
self.fifthR.addWidget(self.sMonth)
self.fifthR.addWidget(self.monthCombo)
self.mainV = QVBoxLayout()
self.mainV.addLayout(self.firstR)
self.mainV.addLayout(self.secondR)
self.mainV.addLayout(self.thirdR)
self.setLayout(self.mainV)
def on_checked(self, state):
if state == Qt.Checked:
print('Checked')
self.mainV.addLayout(self.fourthR)
self.mainV.addLayout(self.fifthR)
else:
print('Unchecked')
## self.mainV.removeWidget(self.sMonth)
## self.mainV.removeWidget(self.monthCombo)
## self.mainV.removeWidget(self.sYear)
## self.mainV.removeWidget(self.yearCombo)
self.fourthR.deleteLater()
self.fifthR.deleteLater()
if __name__ == '__main__':
app = QApplication(sys.argv)
main = Main()
main.show()
sys.exit(app.exec_())
有任何建议如何进行？
答案 0 :(得分：0)
我使用的是QGridLayout，它现在可以正常使用，下面是结果：
from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
import sys
class CheckableComboBox(QComboBox):
def __init__(self, parent = None):
super(CheckableComboBox, self).__init__(parent)
self.view().pressed.connect(self.handleItemPressed)
self.setModel(QStandardItemModel(self))
self.setStyleSheet("QComboBox{"
"font-size:11px;"
"color:black;"
"background-color:white;"
"border:1px solid black;"
"padding:1px;""}")
self.setEditable(True)
self.lineEdit().setAlignment(Qt.AlignCenter)
self.lineEdit().setReadOnly(True)
self.setMinimumSize(150, 40)
def handleItemPressed(self, index):
item = self.model().itemFromIndex(index)
if item.text() != ' ' and item.checkState() == Qt.Checked:
item.setCheckState(Qt.Unchecked)
if item.text() != ' ' and item.checkState() != Qt.Checked:
item.setCheckState(Qt.Checked)
class Example(QWidget):
def __init__(self):
super().__init__()
self.init_UI()
def init_UI(self):
self.years = [' ', '2017', '2018', '2019', '2020']
self.months = [' ', '1', '2', '3', '4', '5', '6', '7', '8', '9', '10', '11', '12']
self.metrics = [' ', 'Seller', 'Section', 'Store']
self.units = [' ', 'Number of Pieces Sold', 'Total Value']
self.setWindowTitle('Dialog')
self.sMetric = QLabel('Select metric(s):')
self.sUnit = QLabel('Select unit(s):')
self.okButton = QPushButton('Ok')
self.cancelButton = QPushButton('Cancel')
for i in (self.sMetric, self.sUnit, self.okButton, self.cancelButton):
i.setFixedHeight(40)
i.setFixedWidth(150)
self.timeWise = QCheckBox('Time-wise View')
self.timeWise.stateChanged.connect(self.on_checked)
self.metricCombo = CheckableComboBox()
for index, element in enumerate(self.metrics):
self.metricCombo.addItem(element)
if index > 0:
item = self.metricCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.unitCombo = CheckableComboBox()
for index, element in enumerate(self.units):
self.unitCombo.addItem(element)
if index > 0:
item = self.unitCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.grid = QGridLayout()
self.grid.setSpacing(10)
self.grid.addWidget(self.sMetric, 1, 0)
self.grid.addWidget(self.metricCombo, 1, 1)
self.grid.addWidget(self.sUnit, 2, 0)
self.grid.addWidget(self.unitCombo, 2, 1)
self.grid.addWidget(self.timeWise, 3, 0)
self.grid.addWidget(self.okButton, 6, 0)
self.grid.addWidget(self.cancelButton, 6, 1)
self.setLayout(self.grid)
def on_checked(self, state):
if state == Qt.Checked:
print('Checked')
self.sYear = QLabel('Select year(s):')
self.sMonth = QLabel('Select month(s):')
for i in (self.sYear, self.sMonth):
i.setFixedHeight(40)
i.setFixedWidth(150)
self.monthCombo = CheckableComboBox()
for index, element in enumerate(self.months):
self.monthCombo.addItem(element)
if index > 0:
item = self.monthCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.yearCombo = CheckableComboBox()
for index, element in enumerate(self.years):
self.yearCombo.addItem(element)
if index > 0:
item = self.yearCombo.model().item(index, 0)
item.setCheckState(Qt.Unchecked)
self.grid.addWidget(self.sYear, 4, 0)
self.grid.addWidget(self.yearCombo, 4, 1)
self.grid.addWidget(self.sMonth, 5, 0)
self.grid.addWidget(self.monthCombo, 5, 1)
else:
print('Unchecked')
self.sYear.deleteLater()
self.sMonth.deleteLater()
self.monthCombo.deleteLater()
self.yearCombo.deleteLater()
if __name__ == '__main__':
app = QApplication(sys.argv)
main = Example()
main.show()
sys.exit(app.exec_())