QTreeWidget 获取被双击的子项的层次路径

from PyQt5.QtWidgets import (QApplication, QWidget, QHBoxLayout,
QTreeWidget, QTreeWidgetItem,
QGroupBox)
from PyQt5.QtGui import QIcon, QPixmap
from PyQt5.QtCore import QSize

class  Bar_Navigation(QWidget):
def  __init__(self):
super(Bar_Navigation, self).__init__()
self.setMinimumHeight(600);
self.setMinimumWidth(800);

##layout_main.setMargin(5)
##layout_main.setSpace(5)
self.creat_main_layout()
self.creat_bar_navigation()
self.creat_left_box()

def get_bar_list(self):

bar_list_item = []
bar_list_1 = ["订货管理",
["客户订货", "库存订货", "供货商订货"]
]
bar_list_2 = ["入库管理",
["采购入库", "订货入库", "其它入库"]
]
bar_list_item.append(bar_list_1)
bar_list_item.append(bar_list_2)
return  bar_list_item

def creat_main_layout(self):
self.layout_main = QHBoxLayout()
self.setLayout( self.layout_main)

def creat_bar_list(self, data):

for item in data:
item_1 =  QTreeWidgetItem( self.tree_Navigation);
##item_1.setText(0,item[0])

　　　　　　　　　 ## 设置节点的打开/关闭状态下的不同的图片
icon = QIcon()
##节点打开状态
icon.addPixmap(QPixmap("./logo2.png"), QIcon.Normal, QIcon.On)
##节点关闭状态　　
icon.addPixmap(QPixmap("./logo1.png"), QIcon.Normal, QIcon.Off)
item_1.setIcon(0, icon)

for item_item in item[1]:
item_1_1 =  QTreeWidgetItem( item_1);
item_1_1.setText(0,item_item)
self.tree_Navigation.addTopLevelItem(item_1);

def creat_bar_navigation(self):
self.tree_Navigation = QTreeWidget()
self.tree_Navigation.setHeaderLabel("左侧导航栏");
self.tree_Navigation.setColumnCount(1)
self.tree_Navigation.setMaximumWidth(150);

icon_size = QSize(100, 30)
self.tree_Navigation.setIconSize(icon_size)

##如果treewidget就一列，该列的宽度默认等于treewidget的宽度,两列以上的话才起作用.
##self.tree_Navigation.setColumnWidth(0,100);
data = self.get_bar_list()
self.creat_bar_list(data)
self.layout_main.addWidget(self.tree_Navigation)
## QModelIndex
##self.tree_Navigation.doubleClicked.connect(self.showModelSelected)
## QTreeWidgetItem
self.tree_Navigation.itemDoubleClicked.connect(self.showSelected)

## QModelIndex
def showModelSelected(self, modelIndex):
print( modelIndex.row(), modelIndex.column())

## itemObj:QTreeWidgetItem
def showSelected(self, item, column):
##获得父节点
parent=item.parent()

## 注:本例的深度只有2,因此只有index_top,index_row两个变量表示路径
##根节点上的索引
## 合理值:非负整数
index_top = 0
## 子节点上的索引
##如果为-1则标示是根节点上的项;如果不是-1则标示在子节点上
## 合理值:非负整数
index_row = -1

## 如果是要判断是否为None，则：
if parent is None:
index_top= self.tree_Navigation.indexOfTopLevelItem(item)
else :
index_top =  self.tree_Navigation.indexOfTopLevelItem(parent)
index_row=parent.indexOfChild(item)##获得节点在父节点中的行号(从0开始)

print(index_top,  index_row)

def creat_left_box(self):
self.box_left = QGroupBox('left party')
self.layout_main.addWidget(self.box_left)

if __name__ == "__main__":

import sys

app = QApplication(sys.argv)
window = Bar_Navigation()
window.show()

sys.exit(app.exec_())

个人注解：

①、treeWidget.setColumnWidth(0,100)

如果treewidget就一列，该列的宽度默认等于treewidget的宽度,两列以上的话才起作用,

②、如果是treeview获取点击的层级路径：

　　modelindex.parent()可以获得其上级。