QTreeWidget、QTreeView

QTreeWidget基本用法

'''

树控件（QTreeWidget）的基本用法



'''

import sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import QIcon, QBrush, QColor
from PyQt5.QtCore import Qt


class BasicTreeWidget(QMainWindow):
    def __init__(self, parent=None):
        super(BasicTreeWidget, self).__init__(parent)
        self.setWindowTitle('树控件（QTreeWidget）的基本用法')

        self.tree = QTreeWidget()
        # 为树控件指定列数
        self.tree.setColumnCount(2)

        # 指定列标签
        self.tree.setHeaderLabels(['Key','Value'])

        root = QTreeWidgetItem(self.tree)
        root.setText(0,'根节点')
        root.setIcon(0,QIcon('./images/root.png'))
        self.tree.setColumnWidth(0,160)

        # 添加子节点1
        child1 = QTreeWidgetItem(root)
        child1.setText(0,'子节点1')
        child1.setText(1,'子节点1的数据')
        child1.setIcon(0,QIcon('./images/bao3.png'))
        child1.setCheckState(0,Qt.Checked)

        # 添加子节点2
        child2 = QTreeWidgetItem(root)
        child2.setText(0,'子节点2')
        child2.setIcon(0,QIcon('./images/bao6.png'))

        # 为child2添加一个子节点
        child3 = QTreeWidgetItem(child2)
        child3.setText(0,'子节点2-1')
        child3.setText(1,'新的值')
        child3.setIcon(0,QIcon('./images/music.png'))


        self.tree.expandAll()

        self.setCentralWidget(self.tree)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    tree = BasicTreeWidget()
    tree.show()
    sys.exit(app.exec_())

QTreeWidget树节点添加事件

'''

为树节点添加响应事件

'''
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
import sys


class TreeEvent(QMainWindow):
    def __init__(self, parent=None):
        super(TreeEvent, self).__init__(parent)
        self.setWindowTitle('为树节点添加响应事件')

        self.tree = QTreeWidget()

        self.tree.setColumnCount(2)

        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(child2)
        child3.setText(0,'child3')
        child3.setText(1,'3')
        self.tree.clicked.connect(self.onTreeClicked)
        self.setCentralWidget(self.tree)
    def onTreeClicked(self,index):
        item = self.tree.currentItem()
        print(index.row())
        print('key=%s,value=%s' % (item.text(0),item.text(1)))

if __name__ == '__main__':
    app = QApplication(sys.argv)
    tree = TreeEvent()
    tree.show()
    sys.exit(app.exec_())

QTreeWidget添加节点、编辑节点、删除节点

'''

添加、修改和删除树控件中的节点

'''

import sys
from PyQt5.QtWidgets import *


class ModifyTree(QWidget):
    def __init__(self, parent=None):
        super(ModifyTree, self).__init__(parent)
        self.setWindowTitle('TreeWidget 例子')

        operatorLayout = QHBoxLayout()
        addBtn = QPushButton('添加节点')
        updateBtn = QPushButton('修改节点')
        deleteBtn = QPushButton('删除节点')

        operatorLayout.addWidget(addBtn)
        operatorLayout.addWidget(updateBtn)
        operatorLayout.addWidget(deleteBtn)

        addBtn.clicked.connect(self.addNode)
        updateBtn.clicked.connect(self.updateNode)
        deleteBtn.clicked.connect(self.deleteNode)

        self.tree = QTreeWidget()

        self.tree.setColumnCount(2)

        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(child2)
        child3.setText(0,'child3')
        child3.setText(1,'3')
        self.tree.clicked.connect(self.onTreeClicked)

        mainLayout = QVBoxLayout(self)
        mainLayout.addLayout(operatorLayout)
        mainLayout.addWidget(self.tree)
        self.setLayout(mainLayout)

    def onTreeClicked(self,index):
        item = self.tree.currentItem()
        print(index.row())
        print('key=%s,value=%s' % (item.text(0),item.text(1)))

    # 添加节点
    def addNode(self):
        print('添加节点')
        item = self.tree.currentItem()
        print(item)
        node = QTreeWidgetItem(item)
        node.setText(0,'新节点')
        node.setText(1,'新值')

    def updateNode(self):
        print('修改节点')
        item = self.tree.currentItem()
        item.setText(0,'修改节点')
        item.setText(1, '值已经被修改')



    def deleteNode(self):
        print('删除节点')
        item = self.tree.currentItem()
        root = self.tree.invisibleRootItem()
        for item in self.tree.selectedItems():
            (item.parent() or root).removeChild(item)





if __name__ == '__main__':
    app = QApplication(sys.argv)
    tree = ModifyTree()
    tree.show()
    sys.exit(app.exec_())

---

QTreeView

'''
QTreeView与系统定制模式
QTreeWidget
Model
QDirModel
'''
import  sys
from PyQt5.QtWidgets import *
from PyQt5.QtGui import *


if __name__=="__main__":
    app=QApplication(sys.argv)
    model=QDirModel()
    tree=QTreeView()
    tree.setModel(model)
    tree.setWindowTitle("QtreeView")
    tree.resize(600,400)
    tree.show()

    sys.exit(app.exec())