QTreeWight属性及树形菜单

QTreeWight

QTreeWidget类中的常用方法

方法	描述
setColumnWidth(int column,int width)	将指定列的宽度设置为给定的值
nsertTopLevelItems()	在视图的顶层索引中引入项目的列表
expandAll()	展开所有节点的树形节点
invisibleRootItem()	返回树形控件中不可见的根选项（Root Item）
selectionItems()	返回所有选定的非隐藏项目的列表
setRootIsDecorated()	显示QTreeWidget中节点展开的三角符号 True：开
setUniformRowHeights()	树节点展开功能 True：开
setItemsExpandable()	控制视图中所有数据项是否保持相同高度，所有高度都与视图中第一个数据项的高度相同并会跟随调整
setAnimated ()	滑动展开 True：开
setHeaderHidden()	隐藏树结构头
setExpandsOnDoubleClick()	双击展开树结构，默认为单击

QTreeWidgetItem类中常用的方法

方法	描述
addChild()	将子项追加到子列表中
setText()	设置显示的节点文本
Text()	返回显示的节点文本
setCheckState(column.state)	设置指定列的选中状态
setIcon(column,icon)	在指定的列中显示图标

Checked:节点选中 ； Unchecked:节点没有选中

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实现效果

1.二合一

# coding=utf-8

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


class demo(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        hbox = QHBoxLayout(self)

        left = QFrame(self)
        left.setFrameShape(QFrame.StyledPanel)  # QFrame 控件添加StyledPanel样式使QFrame 控件之间的界限更加明显
        right = QFrame(self)
        right.setFrameShape(QFrame.StyledPanel)

        splitter1 = QSplitter(Qt.Horizontal)
        splitter1.addWidget(left)
        splitter1.setSizes([20, ])  # 设置分隔条位置
        splitter1.addWidget(right)
        hbox.addWidget(splitter1)
        self.setLayout(hbox)

        # # 树型菜单控件样式及属性设置
        self.tree = QTreeWidget(left)
        self.tree.setStyleSheet("background-color:#eeeeee;border:outset;color:#215b63;")  # 树形结构样式
        self.tree.setAutoScroll(True)  # 滑动栏自动
        self.tree.setEditTriggers(QAbstractItemView.DoubleClicked | QAbstractItemView.EditKeyPressed)  # 触发方式
        self.tree.setTextElideMode(Qt.ElideMiddle)  # elidemode（省略模式），指文本超出控件显示范围时，以省略号代替未能显示的文本
        self.tree.setIndentation(30)
        self.tree.setRootIsDecorated(True)  # 去掉QTreeWidget中节点之间的虚线
        self.tree.setUniformRowHeights(True)  # 控制视图中所有数据项是否保持相同高度，所有高度都与视图中第一个数据项的高度相同，如果视图中第一个数据项的高度调整，其他数据项的高度都会跟随调整。
        self.tree.setItemsExpandable(True)  # 树节点展开功能 True：开
        self.tree.setAnimated(False)  # 滑动展开
        self.tree.setHeaderHidden(True)  # 隐藏树结构头
        self.tree.setExpandsOnDoubleClick(True)  # 双击展开树结构，默认为单击
        self.tree.setObjectName("tree")  # 设置属性名

        # 设置根节点
        root = QTreeWidgetItem(self.tree)
        root.setText(0, '测试根节点1')
        root1 = QTreeWidgetItem(self.tree)
        root1.setText(0, "测试根节点2")
        # # 设置树形控件的列的宽度
        # self.tree.setColumnWidth(0, 150)
        # 设置子节点1
        child1 = QTreeWidgetItem()
        child1.setText(0, '测试1')
        root.addChild(child1)
        # 设置子节点2
        child2 = QTreeWidgetItem(root)
        child2.setText(0, '测试2')
        # 设置子节点3
        child1 = QTreeWidgetItem()
        child1.setText(0, '测试3')
        root1.addChild(child1)
        # 加载根节点的所有属性与子控件
        self.tree.addTopLevelItem(root)
        self.tree.addTopLevelItem(root1)
        
        
        # 树节点监听事件
        self.tree.clicked.connect(self.onClicked)

        # 窗口最大化
        self.showMaximized()
        self.setWindowTitle('树案列')
        self.show()

    def onClicked(self):
        item = self.tree.currentItem()
        print('Key=%s,value=%s' % (item.text(0), item.text(1)))
        if item.text(0) == '测试1':
            self.on_pushButton1_clicked()
        elif item.text(0) == '测试2':
            self.on_pushButton2_clicked()
        else:
            print('返回主界面')

    # 打开测试1
    def on_pushButton1_clicked(self):
        print("测试1")

    # 打开测试2
    def on_pushButton2_clicked(self):
        print("测试2")


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

1.基于Qt designer

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UI文件（基于Qt designer）

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.15.0
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(397, 414)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.treeWidget = QtWidgets.QTreeWidget(self.centralwidget)
        self.treeWidget.setGeometry(QtCore.QRect(0, 60, 191, 221))
        self.treeWidget.setStyleSheet("font: 10pt \"楷体\";")
        self.treeWidget.setObjectName("treeWidget")
        self.treeWidget.headerItem().setBackground(0, QtGui.QColor(0, 255, 0))
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        item_0 = QtWidgets.QTreeWidgetItem(self.treeWidget)
        item_1 = QtWidgets.QTreeWidgetItem(item_0)
        self.label = QtWidgets.QLabel(self.centralwidget)
        self.label.setGeometry(QtCore.QRect(0, 0, 191, 61))
        self.label.setStyleSheet("background-color: rgb(255, 255, 0);\n"
"font: 12pt \"楷体\";")
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.label.setObjectName("label")
        MainWindow.setCentralWidget(self.centralwidget)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.treeWidget.headerItem().setText(0, _translate("MainWindow", "测试列表"))
        __sortingEnabled = self.treeWidget.isSortingEnabled()
        self.treeWidget.setSortingEnabled(False)
        self.treeWidget.topLevelItem(0).setText(0, _translate("MainWindow", "测试1"))
        self.treeWidget.topLevelItem(0).child(0).setText(0, _translate("MainWindow", "测试a"))
        self.treeWidget.topLevelItem(0).child(1).setText(0, _translate("MainWindow", "测试b"))
        self.treeWidget.topLevelItem(1).setText(0, _translate("MainWindow", "测试2"))
        self.treeWidget.topLevelItem(1).child(0).setText(0, _translate("MainWindow", "测试c"))
        self.treeWidget.topLevelItem(1).child(1).setText(0, _translate("MainWindow", "测试d"))
        self.treeWidget.topLevelItem(2).setText(0, _translate("MainWindow", "测试3"))
        self.treeWidget.topLevelItem(2).child(0).setText(0, _translate("MainWindow", "测试e"))
        self.treeWidget.setSortingEnabled(__sortingEnabled)
        self.label.setText(_translate("MainWindow", "QTreeWight实例"))

class MainCode(QMainWindow, MainUi.Ui_MainWindow):
    def __init__(self):
        QMainWindow.__init__(self)
        MainUi.Ui_MainWindow.__init__(self)
        self.setupUi(self)
        self.status = self.statusBar()
        
        self.treeWidget.clicked.connect(self.treeWidget_clicked)  # 绑定事件
        
    def treeWidget_clicked(self):
        item = self.treeWidget.currentItem()
        print('Key=%s,value=%s' % (item.text(0), item.text(1)))  # item().text(n) n代表第几行
        if item.text(0) == '测试1':
            # self.on_pushButton1_clicked()
            print("测试1")
        elif item.text(0) == '测试a':
            # self.on_pushButton2_clicked()
            # self.treeWidget_DeviceList.
            print("测试a")
        elif item.text(0) == '测试c':
            # self.on_pushButton2_clicked()
            print("测试c")
            .........
        else:
            print('没有匹配到！')
 
 if __name__ == '__main__':
    QtCore.QCoreApplication.setAttribute(QtCore.Qt.AA_EnableHighDpiScaling)  # Qt从5.6.0开始，支持High-DPI
    app = QApplication(sys.argv)
    md = MainCode()
    md.show()
    sys.exit(app.exec_())

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树形菜单样式

self.treeWidget.setStyleSheet(
            "QTreeView::item:hover{background-color:rgb(0,255,0,50)}"
            "QTreeView::item:selected{background-color:rgb(255,0,0,100)}")

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1.PyQt5树节点点击实现多窗口切换
2. pyqt5 QTreeWidget使用集锦

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