关于多选组合的想法是在之前提出的，但是我不确定它是否是最佳解决方案。确实，所需要的只是一个带有下拉菜单的工具按钮（类似于网络浏览器中的历史记录按钮）。
这是示例的更新，说明了两个选项：
from PyQt4 import QtGui, QtCore
import sys, os
class CheckableCombo@R_724_2419@(QtGui.QCombo@R_724_2419@):
def __init__(self):
super(CheckableCombo@R_724_2419@, 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(QtGui.QMainWindow):
def __init__(self):
super(QtGui.QMainWindow,self).__init__()
myQWidget = QtGui.QWidget()
my@R_724_2419@Layout = QtGui.QV@R_724_2419@Layout()
myQWidget.setLayout(my@R_724_2419@Layout)
self.setCentralWidget(myQWidget)
self.Combo@R_724_2419@ = CheckableCombo@R_724_2419@()
for i in range(3):
self.Combo@R_724_2419@.addItem("Combo@R_724_2419@ Item " + str(i))
item = self.Combo@R_724_2419@.model().item(i, 0)
item.setCheckState(QtCore.Qt.Unchecked)
self.toolbutton = QtGui.QToolButton(self)
self.toolbutton.setText('Select Categories ')
self.toolmenu = QtGui.QMenu(self)
for i in range(3):
action = self.toolmenu.addAction("Category " + str(i))
action.setCheckable(True)
self.toolbutton.setMenu(self.toolmenu)
self.toolbutton.setPopupMode(QtGui.QToolButton.InstantPopup)
my@R_724_2419@Layout.addWidget(self.toolbutton)
my@R_724_2419@Layout.addWidget(self.Combo@R_724_2419@)
if __name__ == '__main__':
app = QtGui.QApplication(sys.argv)
dialog_1 = Dialog_01()
dialog_1.show()
dialog_1.resize(480,320)
sys.exit(app.exec_())
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