python pyqt5 QTreeWidget 动态添加节点
image.png
!/usr/bin/env python3
''' PyQT5中 QTreeWidget 例子
'''
import sys from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon , QBrush , QColor
from PyQt5.QtCore import Qt
class TreeWidgetDemo(QWidget): def init (self, parent=None): super(TreeWidgetDemo, self). init (parent) self.setWindowTitle('TreeWidget 例子')
operatorLayout = QHBoxLayout()
addBtn = QPushButton("添加节点")
updateBtn = QPushButton("修改节点")
delBtn = QPushButton("删除节点")
operatorLayout.addWidget(addBtn)
operatorLayout.addWidget(updateBtn)
operatorLayout.addWidget(delBtn)
# 按钮的信号槽连接
addBtn.clicked.connect(self.addTreeNodeBtn)
updateBtn.clicked.connect(self.updateTreeNodeBtn)
delBtn.clicked.connect(self.delTreeNodeBtn)
self.tree = QTreeWidget(self)
# 设置列数
self.tree.setColumnCount(2)
# 设置头的标题
self.tree.setHeaderLabels(['Key', 'Value'])
root = QTreeWidgetItem(self.tree)
root.setText(0, 'root')
root.setText(1, '0')
child1 = QTreeWidgetItem(root)
child1.setText(0, 'child1')
child1.setText(1, '1')
child2 = QTreeWidgetItem(root)
child2.setText(0, 'child2')
child2.setText(1, '2')
child3 = QTreeWidgetItem(root)
child3.setText(0, 'child3')
child3.setText(1, '3')
child4 = QTreeWidgetItem(child3)
child4.setText(0, 'child4')
child4.setText(1, '4')
child5 = QTreeWidgetItem(child3)
child5.setText(0, 'child5')
child5.setText(1, '5')
self.tree.addTopLevelItem(root)
self.tree.clicked.connect(self.onTreeClicked)
mainLayout = QVBoxLayout(self);
mainLayout.addLayout(operatorLayout);
mainLayout.addWidget(self.tree);
self.setLayout(mainLayout)
def onTreeClicked(self, qmodelindex):
item = self.tree.currentItem()
print("key=%s ,value=%s" % (item.text(0), item.text(1)))
def addTreeNodeBtn(self):
print('--- addTreeNodeBtn ---')
item = self.tree.currentItem()
node = QTreeWidgetItem(item)
node.setText(0, 'newNode')
node.setText(1, '10')
def updateTreeNodeBtn(self):
print('--- updateTreeNodeBtn ---')
item = self.tree.currentItem()
item.setText(0, 'updateNode')
item.setText(1, '20')
def delTreeNodeBtn(self):
print('--- delTreeNodeBtn ---')
item = self.tree.currentItem()
root = self.tree.invisibleRootItem()