我正在尝试将第1列中的组合框的值与第3列中的框链接。在更改第1列中的值时，下拉组合框中的值需要更改为新集合。单击该按钮后，将添加具有类似组合框功能的新行。问题在于，第1列中唯一响应组合框值更改的行是添加的最新行。如何在所有行中保留链接，同时根据需要添加行？
我当前已将活动行设置为最新。单击组合框时如何获取活动行以激活该行？我正在将所有combobxes存储在字典中。
我的尝试：
from PyQt5 import QtCore, QtGui, QtWidgets
class Ui_MainWindow(object):
def setupUi(self, MainWindow):
MainWindow.setObjectName("MainWindow")
MainWindow.resize(800, 600)
self.centralwidget = QtWidgets.QWidget(MainWindow)
self.centralwidget.setObjectName("centralwidget")
self.tableWidget = QtWidgets.QTableWidget(self.centralwidget)
self.tableWidget.setGeometry(QtCore.QRect(60, 100, 551, 331))
self.tableWidget.setObjectName("tableWidget")
self.tableWidget.setColumnCount(3)
self.tableWidget.setRowCount(0)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(0, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(1, item)
item = QtWidgets.QTableWidgetItem()
self.tableWidget.setHorizontalHeaderItem(2, item)
self.pushButton = QtWidgets.QPushButton(self.centralwidget)
self.pushButton.setGeometry(QtCore.QRect(60, 450, 75, 23))
self.pushButton.setObjectName("pushButton")
MainWindow.setCentralWidget(self.centralwidget)
self.menubar = QtWidgets.QMenuBar(MainWindow)
self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
self.menubar.setObjectName("menubar")
MainWindow.setMenuBar(self.menubar)
self.statusbar = QtWidgets.QStatusBar(MainWindow)
self.statusbar.setObjectName("statusbar")
MainWindow.setStatusBar(self.statusbar)
self.retranslateUi(MainWindow)
QtCore.QMetaObject.connectSlotsByName(MainWindow)
def retranslateUi(self, MainWindow):
_translate = QtCore.QCoreApplication.translate
MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
item = self.tableWidget.horizontalHeaderItem(0)
item.setText(_translate("MainWindow", "Col 1"))
item = self.tableWidget.horizontalHeaderItem(1)
item.setText(_translate("MainWindow", "Col 2"))
item = self.tableWidget.horizontalHeaderItem(2)
item.setText(_translate("MainWindow", "Col 3"))
self.pushButton.setText(_translate("MainWindow", "PushButton"))
class mainWindow(Ui_MainWindow, QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(mainWindow, self).__init__(parent)
self.setupUi(self)
self.pushButton.clicked.connect(self.populate_table)
# Combo box creator templates
def comboBox_populator(self,values):
combo = QtWidgets.QComboBox()
for element in values:
combo.addItem(element)
return combo
# Action to do on vehcile change
def onComboChange(self):
# selVehNames = self.selVehNames
self.switchTo = self.comboBoxRows[self.counter][0].currentText()
if self.switchTo == [] or self.switchTo == '':
pass
else:
if self.switchTo == 'a':
col1Data3 = ['x','y','z']
elif self.switchTo == 'b':
col1Data3 = ['4','5','6']
elif self.switchTo == 'c':
col1Data3 = ['21','22','23']
else:
pass
# Update dict with comboboxes
# col1Data1 = self.comboBoxRows[self.counter][0]
# col1Data2 = self.comboBoxRows[self.counter][1]
# self.AllComboBoxes = [col1Data1, col1Data2, col1Data3]
colDataBox3 = self.comboBox_populator(col1Data3)
print(col1Data3)
# self.comboBoxRows.update({self.counter:self.AllComboBoxes})
self.tableWidget.setCellWidget(self.counter,2,colDataBox3)
# Populate the table
def populate_table(self):
self.AllComboBoxes = []
self.comboBoxRows = {}
# Table row information
rowCountcur = self.tableWidget.currentRow()
self.tableWidget.insertRow(rowCountcur+1)
self.counter = rowCountcur + 1
# General Data
col1Data1 = ['a','b','c']
col1Data2 = ['e','f','g']
col1Data3 = ['x','y','z']
# Create combobox
colDataBox1 = self.comboBox_populator(col1Data1)
colDataBox2 = self.comboBox_populator(col1Data2)
colDataBox3 = self.comboBox_populator(col1Data3)
self.AllComboBoxes = [colDataBox1, colDataBox2, colDataBox3]
self.comboBoxRows.update({self.counter:self.AllComboBoxes})
# Populate columns
self.tableWidget.setCellWidget(self.counter,0,self.comboBoxRows[self.counter][0])
# Populate vehicle list and cell, col 2
self.tableWidget.setCellWidget(self.counter,1,self.comboBoxRows[self.counter][1])
# Populate mission order list and cell, col 3
self.tableWidget.setCellWidget(self.counter,2,self.comboBoxRows[self.counter][2])
self.comboBoxRows[self.counter][0].currentTextChanged.connect(self.onComboChange)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = mainWindow()
w.show()
sys.exit(app.exec_())
答案 0 :(得分：2)
您遇到的问题是self.counter永远不会更改，因为currentRow不会指示行号，并且在您的情况下始终为-1，因此self.counter始终为0。
问题的关键是获取QComboBox的行并获取它，您必须遵循以下过程：
在与currentIndexChanged信号关联的插槽中使用sender()获取组合框。
使用viewport()方法从QTableWidget的mapTo()获取QComboBox左上角的位置。
使用通过indexAt()方法获得的QModelIndex获取行。
另一方面，您可以使用itemData相对于初始组合框存储另一个组合框的选项。
from PyQt5 import QtCore, QtGui, QtWidgets
class MainWindow(QtWidgets.QMainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.m_tablewidget = QtWidgets.QTableWidget(0, 3)
self.m_tablewidget.setHorizontalHeaderLabels(
["Col 1", "Col 2", "Col 3"]
)
self.m_button = QtWidgets.QPushButton("Add Row", clicked=self.onClicked)
central_widget = QtWidgets.QWidget()
self.setCentralWidget(central_widget)
lay = QtWidgets.QVBoxLayout(central_widget)
lay.addWidget(self.m_tablewidget)
lay.addWidget(self.m_button, alignment=QtCore.Qt.AlignLeft)
@QtCore.pyqtSlot()
def onClicked(self):
d = {
"a": ["x", "y", "z"],
"b": ["4", "5", "6"],
"c": ["21", "22", "23"],
}
combobox1 = QtWidgets.QComboBox()
for k, v in d.items():
combobox1.addItem(k, v)
combobox2 = QtWidgets.QComboBox()
combobox2.addItems(combobox1.currentData())
combobox3 = QtWidgets.QComboBox()
combobox3.addItems(["e", "f", "g"])
combobox1.currentIndexChanged.connect(self.onCurrentTextChanged)
rc = self.m_tablewidget.rowCount()
self.m_tablewidget.insertRow(rc)
for i, combo in enumerate((combobox1, combobox2, combobox3)):
self.m_tablewidget.setCellWidget(rc, i, combo)
@QtCore.pyqtSlot()
def onCurrentTextChanged(self):
combobox1 = self.sender()
if not isinstance(combobox1, QtWidgets.QComboBox):
return
p = combobox1.mapTo(self.m_tablewidget.viewport(), QtCore.QPoint())
ix = self.m_tablewidget.indexAt(p)
if not ix.isValid() or ix.column() != 0:
return
r = ix.row()
data = combobox1.currentData()
combobox3 = self.m_tablewidget.cellWidget(r, 2)
if not isinstance(combobox3, QtWidgets.QComboBox):
return
combobox3.clear()
combobox3.addItems(data)
if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
w = MainWindow()
w.resize(640, 480)
w.show()
sys.exit(app.exec_())