我怎样才能实现QComboBox http://qt-project.org/doc/qt-5/qcombobox.html允许您从树结构中进行选择，类似于QTreeView http://qt-project.org/doc/qt-5/qtreeview.html?
我想出了以下课程（TreeComboBox）使用developer.nokia.com上的两部分配方（Part 1 https://web.archive.org/web/20110906122617/http://www.developer.nokia.com/Community/Wiki/Implementing_QTreeView_in_QComboBox_using_Qt-_Part_1, Part 2 https://web.archive.org/web/20130707175929/http://www.developer.nokia.com/Community/Wiki/Implementing_QTreeView_in_QComboBox_using_Qt-_Part_2):
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *
class TreeComboBox(QComboBox):
def __init__(self, *args):
super().__init__(*args)
self.__skip_next_hide = False
tree_view = QTreeView(self)
tree_view.setFrameShape(QFrame.NoFrame)
tree_view.setEditTriggers(tree_view.NoEditTriggers)
tree_view.setAlternatingRowColors(True)
tree_view.setSelectionBehavior(tree_view.SelectRows)
tree_view.setWordWrap(True)
tree_view.setAllColumnsShowFocus(True)
self.setView(tree_view)
self.view().viewport().installEventFilter(self)
def showPopup(self):
self.setRootModelIndex(QModelIndex())
super().showPopup()
def hidePopup(self):
self.setRootModelIndex(self.view().currentIndex().parent())
self.setCurrentIndex(self.view().currentIndex().row())
if self.__skip_next_hide:
self.__skip_next_hide = False
else:
super().hidePopup()
def selectIndex(self, index):
self.setRootModelIndex(index.parent())
self.setCurrentIndex(index.row())
def eventFilter(self, object, event):
if event.type() == QEvent.MouseButtonPress and object is self.view().viewport():
index = self.view().indexAt(event.pos())
self.__skip_next_hide = not self.view().visualRect(index).contains(event.pos())
return False
app = QApplication([])
combo = TreeComboBox()
combo.resize(200, 30)
parent_item = QStandardItem('Item 1')
parent_item.appendRow([QStandardItem('Child'), QStandardItem('Yesterday')])
model = QStandardItemModel()
model.appendRow([parent_item, QStandardItem('Today')])
model.appendRow([QStandardItem('Item 2'), QStandardItem('Today')])
model.setHeaderData(0, Qt.Horizontal, 'Name', Qt.DisplayRole)
model.setHeaderData(1, Qt.Horizontal, 'Date', Qt.DisplayRole)
combo.setModel(model)
combo.show()
app.exec_()
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