Python 如何从multiselect QComboBox获取选中项?
我能够使用QComboBox和QStandardItemModel实现multi-select,但无法使用selectedItems()或checkedItems()选项获取所选项目,该选项会显示一条错误消息,显示为:Python 如何从multiselect QComboBox获取选中项?,python,pyqt,pyqt5,qcombobox,Python,Pyqt,Pyqt5,Qcombobox,我能够使用QComboBox和QStandardItemModel实现multi-select,但无法使用selectedItems()或checkedItems()选项获取所选项目,该选项会显示一条错误消息,显示为: AttributeError: 'QComboBox' object has no attribute 'selectedItems' AttributeError: 'QComboBox' object has no attribute 'chec
AttributeError: 'QComboBox' object has no attribute 'selectedItems'
AttributeError: 'QComboBox' object has no attribute 'checkedItems'
是否有办法获取QComboBox的选定项目列表?
下面是我的代码的示例实现
class CheckableComboBox(QComboBox):
def __init__(self):
super(CheckableComboBox, self).__init__()
self.view().pressed.connect(self.handleItemPressed)
self.setModel(QtGui.QStandardItemModel(self))
def handleItemPressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == QtCore.Qt.Checked:
item.setCheckState(QtCore.Qt.Unchecked)
else:
item.setCheckState(QtCore.Qt.Checked)
class Dialog_01(QMainWindow):
def __init__(self):
super(QMainWindow,self).__init__()
years = ["2017", "2018", "2019", "2020"]
self.comboBoxv = QComboBox(self)
self.model = QtGui.QStandardItemModel(self)
firstItem = QtGui.QStandardItem("Select Years")
firstItem.setBackground(QtGui.QBrush(QtGui.QColor(200, 200, 200)))
firstItem.setSelectable(False)
self.model.setItem(0, 0, firstItem)
for i,area in enumerate(years):
item = QtGui.QStandardItem(area)
item.setFlags(Qt.ItemIsUserCheckable | Qt.ItemIsEnabled)
item.setData(Qt.Unchecked, Qt.CheckStateRole)
self.model.setItem(i+1, 0, item)
self.comboBoxv.setModel(self.model)
self.comboBoxv.installEventFilter(self)
if __name__ == '__main__':
app = QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480,320)
sys.exit(app.exec_())
checkedItems方法不存在,因此会出现该错误。解决方案是在模型上迭代,并验证是否选中了它
from PyQt5 import QtCore, QtGui, QtWidgets
class CheckableComboBox(QtWidgets.QComboBox):
closedPopup = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(CheckableComboBox, self).__init__(parent)
self.setView(QtWidgets.QListView(self))
self.view().pressed.connect(self.handleItemPressed)
self.setModel(QtGui.QStandardItemModel(self))
firstItem = QtGui.QStandardItem("Select Years")
firstItem.setBackground(QtGui.QBrush(QtGui.QColor(200, 200, 200)))
firstItem.setSelectable(False)
self.model().appendRow(firstItem)
@QtCore.pyqtSlot(QtCore.QModelIndex)
def handleItemPressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == QtCore.Qt.Checked:
item.setCheckState(QtCore.Qt.Unchecked)
else:
item.setCheckState(QtCore.Qt.Checked)
def checkedItems(self):
l = []
for i in range(self.model().rowCount()):
it = self.model().item(i)
if it.checkState() == QtCore.Qt.Checked:
l.append(it.text())
return l
def hidePopup(self):
self.closedPopup.emit()
super(CheckableComboBox, self).hidePopup()
QtCore.QTimer.singleShot(0, lambda: self.setCurrentIndex(0))
class Dialog_01(QtWidgets.QMainWindow):
def __init__(self):
super(Dialog_01,self).__init__()
years = ["2017", "2018", "2019", "2020"]
self.comboBoxv = CheckableComboBox()
self.comboBoxv.closedPopup.connect(self.on_closedPopup)
for i, area in enumerate(years):
item = QtGui.QStandardItem(area)
item.setCheckable(True)
item.setCheckState(QtCore.Qt.Unchecked)
self.comboBoxv.model().appendRow(item)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QVBoxLayout(central_widget)
lay.addWidget(self.comboBoxv)
lay.addStretch()
@QtCore.pyqtSlot()
def on_closedPopup(self):
print(self.comboBoxv.checkedItems())
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480,320)
sys.exit(app.exec_())
checkedItems方法不存在,因此会出现该错误。解决方案是在模型上迭代,并验证是否选中了它
from PyQt5 import QtCore, QtGui, QtWidgets
class CheckableComboBox(QtWidgets.QComboBox):
closedPopup = QtCore.pyqtSignal()
def __init__(self, parent=None):
super(CheckableComboBox, self).__init__(parent)
self.setView(QtWidgets.QListView(self))
self.view().pressed.connect(self.handleItemPressed)
self.setModel(QtGui.QStandardItemModel(self))
firstItem = QtGui.QStandardItem("Select Years")
firstItem.setBackground(QtGui.QBrush(QtGui.QColor(200, 200, 200)))
firstItem.setSelectable(False)
self.model().appendRow(firstItem)
@QtCore.pyqtSlot(QtCore.QModelIndex)
def handleItemPressed(self, index):
item = self.model().itemFromIndex(index)
if item.checkState() == QtCore.Qt.Checked:
item.setCheckState(QtCore.Qt.Unchecked)
else:
item.setCheckState(QtCore.Qt.Checked)
def checkedItems(self):
l = []
for i in range(self.model().rowCount()):
it = self.model().item(i)
if it.checkState() == QtCore.Qt.Checked:
l.append(it.text())
return l
def hidePopup(self):
self.closedPopup.emit()
super(CheckableComboBox, self).hidePopup()
QtCore.QTimer.singleShot(0, lambda: self.setCurrentIndex(0))
class Dialog_01(QtWidgets.QMainWindow):
def __init__(self):
super(Dialog_01,self).__init__()
years = ["2017", "2018", "2019", "2020"]
self.comboBoxv = CheckableComboBox()
self.comboBoxv.closedPopup.connect(self.on_closedPopup)
for i, area in enumerate(years):
item = QtGui.QStandardItem(area)
item.setCheckable(True)
item.setCheckState(QtCore.Qt.Unchecked)
self.comboBoxv.model().appendRow(item)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QVBoxLayout(central_widget)
lay.addWidget(self.comboBoxv)
lay.addStretch()
@QtCore.pyqtSlot()
def on_closedPopup(self):
print(self.comboBoxv.checkedItems())
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480,320)
sys.exit(app.exec_())
如何在此处添加代码?请查看我已尝试在``之间插入代码,但它不允许我添加说明过多字符的注释相关信息(如代码)不应出现在注释中,而应出现在您的问题中,因此请编辑您的问题并在此处添加代码。在我的问题中添加代码,谢谢^i如何在此处添加代码?请查看我已尝试在``之间插入代码,但它不允许我添加注释,说明太多字符。相关信息(如代码)不应出现在注释中,而应出现在您的问题中,因此请编辑您的问题并在此处添加代码。在我的问题中添加代码,谢谢^i这很好,我想知道为什么下拉菜单在我选择项目之前不一直下拉,而不是每次选择时都关闭?@user9529330因为组合框的行为只是选择一个元素,如果你不想让它这样做,那么你必须修改该行为,因为你没有指出我不想更改它,您希望弹出窗口何时关闭?如果在我能够选择几个项目并单击下拉列表上的“上一步”后弹出窗口关闭,那就太好了。@user9529330单击用于检查一个项目,单击检查和关闭比较如何?我的意思是我希望下拉列表保持在下拉状态,以便我选择多个项目这很好,我想知道为什么下拉菜单在我选择项目之前不一直下拉,而不是每次选择时都关闭?@user9529330因为组合框的行为只是选择一个元素,如果你不想让它这样做,那么你必须修改该行为,因为你没有指出我不想更改它,您希望弹出窗口何时关闭?如果在我能够选择几个项目并在下拉列表上单击“上一步”后弹出窗口关闭,那就太好了。@user9529330单击用于检查一个项目,单击检查和关闭比较如何?我的意思是我希望下拉列表保持在下拉状态,以便我选择多个项目