如何实现基于树的 QComboBox [英] How to implement a tree-based QComboBox
本文介绍了如何实现基于树的 QComboBox的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我如何实现一个 QComboBox 以便您选择树结构,类似于 QTreeView?
How can I implement a QComboBox that allows you to choose from a tree structure, akin to QTreeView?
推荐答案
我在 developer.nokia.com (第 1 部分,第 2 部分):
I came up with the following class (TreeComboBox
) using a two-part recipe at developer.nokia.com (Part 1, 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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