import sys
from PyQt5 import QtWidgets
class ComboWidget(QtWidgets.QWidget):
def __init__(self, parent=None):
super(ComboWidget, self).__init__(parent)
self.setGeometry(50, 50, 200, 200)
layout = QtWidgets.QVBoxLayout(self)
self.comboA = QtWidgets.QComboBox()
# The second addItem parameter is itemData, which we will retrieve later
self.comboA.addItem('A', ['1', '2', '3', '4'])
self.comboA.addItem('B', ['a', 'b', 'c', 'd', 'e'])
self.comboA.currentIndexChanged.connect(self.indexChanged)
layout.addWidget(self.comboA)
self.comboB = QtWidgets.QComboBox()
# We could have added the 1,2,3,4 items directly, but the following
# is a bit more generic in case the combobox starts with a different
# index for some reason:
self.indexChanged(self.comboA.currentIndex())
layout.addWidget(self.comboB)
self.show()
def indexChanged(self, index):
self.comboB.clear()
data = self.comboA.itemData(index)
if data is not None:
self.comboB.addItems(data)
def main():
app = QtWidgets.QApplication(sys.argv)
w = ComboWidget()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
import sys
from PyQt5.QtWidgets import QWidget, QComboBox, QApplication, QFormLayout, QLabel,QStackedLayout
class DynamicComboExample(QWidget):
def __init__(self):
super().__init__()
self.setupUI()
def setupUI(self):
self.setGeometry(300,300, 500, 300)
self.show()
combo_a = QComboBox(self)
combo_a.addItem('A')
combo_a.addItem('B')
# set slot for when option of combobox A is changed
combo_a.currentIndexChanged[int].connect(self.comboOptionChanged)
self.combo_b = QComboBox()
self.combo_b.addItem('1')
self.combo_b.addItem('2')
self.combo_b.addItem('3')
self.combo_b.addItem('4')
self.combo_c = QComboBox()
self.combo_c.addItem('a')
self.combo_c.addItem('b')
self.combo_c.addItem('c')
self.combo_c.addItem('d')
self.combo_c.addItem('e')
# use a stacked layout to view only one of two combo box at a time
self.combo_container_layout = QStackedLayout()
self.combo_container_layout.addWidget(self.combo_b)
self.combo_container_layout.addWidget(self.combo_c)
combo_container = QWidget()
combo_container.setLayout(self.combo_container_layout)
form_layout = QFormLayout()
form_layout.addRow(QLabel('A:\t'), combo_a)
# the stacked layout is placed in place of the (meant to be) second combobox
form_layout.addRow(QLabel('B:\t'), combo_container)
self.setLayout(form_layout)
def comboOptionChanged(self, idx):
''' gets called when option for combobox A is changed'''
# check which combobox_a option is selected ad show the appropriate combobox in stacked layout
self.combo_container_layout.setCurrentIndex(0 if idx == 0 else 1)
def main():
app= QApplication(sys.argv)
w = DynamicComboExample()
exit(app.exec_())
if __name__ == '__main__':
main()
我会这样做:
这样,您的代码就更加经得起未来的考验了,因为它允许您在任何下拉列表中添加/修改/删除项,如果您想在某个时候这样做的话。在
我通过使用3个组合框(让它们称为x、y和z)来实现
x包含A、B,用于选择在另一个组合框中显示的选项。选择A显示组合框y,选择B显示组合框z
y包含1、2、3、4
Z包含a、b、c、d
我用
QStackedLayout
代替第二个组合框,用两个组合框(y和z)加载它,并根据组合框x中选择的选项一次显示其中一个方法
comboOptionChanged
处理此问题。 每当选择combobox x中的其他选项时,都会调用此方法。在相关问题 更多 >
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