PyQt4 treewidget通过改变父节点控制子节点选择状态（checkbox）

版权声明：zhaojanc https://blog.csdn.net/qq_38641985/article/details/83540508

# -*- coding: utf-8 -*-
import sys
from PyQt4.QtGui import *
from PyQt4.QtCore import *

  


    
class TreeWidget(QWidget):
    def __init__(self):
        super(TreeWidget, self).__init__()
        self.setWindowTitle('TreeWidget')
        
        self.tree = QTreeWidget()  # 实例化一个TreeWidget对象
        self.tree.setColumnCount(2)  # 设置部件的列数为2
        self.tree.setDropIndicatorShown(True)

        self.tree.setSelectionMode(QAbstractItemView.ExtendedSelection)
        self.tree.setHeaderLabels(['Key', 'Value'])  # 设置头部信息对应列的标识符

        # 设置root为self.tree的子树，故root是根节点
        root = QTreeWidgetItem(self.tree)
        root.setText(0, 'root')  # 设置根节点的名称
        root.setCheckState(0, Qt.Unchecked);

        # 为root节点设置子结点
        child1 = QTreeWidgetItem(root)
        child1.setText(0, 'child1')
        child1.setText(1, 'name1')
        child1.setCheckState(0, Qt.Unchecked);
        
        
        child2 = QTreeWidgetItem(root)
        child2.setText(0, 'child2')
        child2.setText(1, 'name2')
        child2.setCheckState(0, Qt.Unchecked);
        
        child3 = QTreeWidgetItem(root)
        child3.setText(0, 'child3')
        child3.setCheckState(0, Qt.Unchecked);
        
        child4 = QTreeWidgetItem(child3)
        
        child4.setText(0, 'child4')
        child4.setToolTip(0,'child4')
        #child4.statusTip(0)
        QToolTip.setFont(QFont('OldEnglish',  30))
       
        
        child4.setText(1, 'name4')
        child4.setToolTip(1,'name4')
        child4.setCheckState(0, Qt.Unchecked);

        button=QPushButton("test")
        lay=QVBoxLayout()
        lay.addWidget(button)
        lay.addWidget(self.tree)

        button.clicked.connect(self.getText)
        self.tree.itemChanged.connect(self.handleChanged)
        self.tree.itemDoubleClicked.connect(self.getText)
        
        self.tree.addTopLevelItem(root)
        self.setLayout(lay)  # 将tree部件设置为该窗口的核心框架
    def handleChanged(self, item, column):
        count = item.childCount()
        #print dir(item)
        if item.checkState(column) == Qt.Checked:
            #print "checked", item, item.text(column)
            for f in range(count):
                item.child(f).setCheckState(0,Qt.Checked)
        if item.checkState(column) == Qt.Unchecked:
            #print "unchecked", item, item.text(column)
            for f in range(count):
                item.child(f).setCheckState(0,Qt.Unchecked)
            
    
        
        
        
    def getText(self):
        #print self.tree.currentItem().text(1)
        
        Item_list= self.tree.selectedItems ()
        for ii in Item_list:
            print ii.text(0)

app = QApplication(sys.argv)
#app.aboutToQuit.connect(app.deleteLater)
tp = TreeWidget()
tp.show()
#app.installEventFilter(tp)
app.exec_()

Function handleChanged负责联系父子节点的控制状态。

child4.setToolTip(0,‘child4’)
QToolTip.setFont(QFont(‘OldEnglish’, 30))
item设置提示标签，并设置字体类型、大小。