PyQt5-QListWidget和QToolButton

下面是我设计的：

1.界面

2.对象查看器

3.信号槽

4.动作编辑器

5.myWidget.py文件

import sys
from PyQt5.QtWidgets import  (QMainWindow,QApplication,QListWidgetItem,
                              QMenu,QToolButton)
from PyQt5.QtCore import pyqtSlot,Qt
from PyQt5.QtGui import QIcon,QCursor

from ui_QtApp import Ui_MainWindow
class QmyMainWindow(QMainWindow):
    def __init__(self,parent=None):
        super().__init__(parent) #调用父类构造函数
        self.ui=Ui_MainWindow() #创建UI对象
        self.ui.setupUi(self) #构造UI
        self.__setActionsForButton()
        self.__createSelectionPopMenu()
        self.__FlagEditable = (Qt.ItemIsSelectable | Qt.ItemIsUserCheckable|
                               Qt.ItemIsEnabled | Qt.ItemIsEditable)
        self.__FlagNotEditable = (Qt.ItemIsSelectable|Qt.ItemIsUserCheckable | Qt.ItemIsEnabled)

    ## ====由connectSlotsByName()自动与组件的信号关联的槽函数=====
    def __setActionsForButton(self):   # 为ToolButton按钮设置Action
        self.ui.toolButton.setDefaultAction(self.ui.actList_Ini)
        self.ui.toolButton_2.setDefaultAction(self.ui.actList_Clear)
        self.ui.toolButton_3.setDefaultAction(self.ui.actList_Insert)
        self.ui.toolButton_4.setDefaultAction(self.ui.actList_Append)
        self.ui.toolButton_5.setDefaultAction(self.ui.actList_Delete)
        self.ui.toolButton_7.setDefaultAction(self.ui.actSel_ALL)
        self.ui.toolButton_8.setDefaultAction(self.ui.actSel_None)
        self.ui.toolButton_9.setDefaultAction(self.ui.actSel_Invs)

    def __createSelectionPopMenu(self):##创建ToolButton按钮的下拉菜单
        menuSelection=QMenu(self)#下拉菜单
        menuSelection.addAction(self.ui.actSel_ALL)
        menuSelection. addAction(self.ui.actSel_None)
        menuSelection. addAction(self.ui.actSel_Invs)

        ##listWidget上方的btnSelectItem按钮
        self.ui.toolButton_6.setPopupMode(QToolButton.MenuButtonPopup)
        ##self.ui. btnSelectItem. setPopupMode(QToolButton.InstantPopup)
        self.ui.toolButton_6.setToolButtonStyle(Qt.ToolButtonTextBesideIcon)
        self.ui.toolButton_6.setDefaultAction(self.ui.actSelPopMenu)
        self.ui.toolButton_6.setMenu(menuSelection)
        # 设置下拉菜单

        ##工具栏上的下拉式菜单按钮
        toolBtn = QToolButton(self)
        toolBtn.setPopupMode(QToolButton.InstantPopup)
        toolBtn.setDefaultAction(self.ui.actSelPopMenu)
        toolBtn.setToolButtonStyle(Qt.ToolButtonTextUnderIcon)
        toolBtn.setMenu(menuSelection)  # 设置下拉菜单
        self.ui.toolBar.addWidget(toolBtn)
        ##工具栏添加分隔条和"退出"按钮
        self.ui.toolBar.addSeparator()
        self.ui.toolBar.addAction(self.ui.actQuit)

    @pyqtSlot()  ##初始化列表
    def on_actList_Ini_triggered(self):
        editable = self.ui.checkBox.isChecked()
        if (editable == True):
            Flag = self.__FlagEditable
        # 可编辑
        else:
            Flag = self.__FlagNotEditable  # 不可编辑
        self.ui.listWidget.clear()
        # 清除列表
        for i in range(10):
            itemStr = "Item %d" %i
            aItem = QListWidgetItem()
            aItem.setText(itemStr)
            aItem.setCheckState(Qt.Checked)
            aItem.setFlags(Flag)# 项的f1ags
            self.ui.listWidget.addItem(aItem)

    @pyqtSlot()##插入一项
    def on_actList_Insert_triggered(self):
        editable=self.ui.checkBox.isChecked()
        if (editable == True):
            Flag=self.__FlagEditable
        #可编辑
        else:
            Flag=self.__F1agNotEditable #不可编辑
        aItem=QListWidgetItem()
        aItem.setText("Inserted Item")
        aItem.setCheckState(Qt.Checked)
        aItem.setFlags(Flag)#项的f1ags
        curRow=self.ui.listWidget.currentRow ()#当前行
        self.ui.listWidget.insertItem(curRow,aItem)

    @pyqtSlot()##删除当前项
    def on_actList_Delete_triggered(self) :
        row=self.ui.listWidget.currentRow()
        self.ui.listWidget.takeItem(row)
    #移除当前项，Python自动删除

    @pyqtSlot()##清空列表
    def on_actList_Clear_triggered(self) :
        self.ui.listWidget.clear()

    @pyqtSlot()  # 全选
    def on_actSel_ALL_triggered(self):
        for i in range(self.ui.listWidget.count()):
            aItem = self.ui.listWidget.item(i)
            aItem.setCheckState(Qt.Checked)

    @pyqtSlot()  # 全不选
    def on_actSel_None_triggered(self):
        for i in range(self.ui.listWidget.count()):
            aItem = self.ui.listWidget.item(i)
            aItem.setCheckState(Qt.Unchecked)

    @pyqtSlot()#反选
    def on_actSel_Invs_triggered(self):
        for i in range(self.ui.listWidget.count()):
            aItem=self.ui.listWidget.item(i)
            if (aItem.checkState()!=Qt.Checked) :
                aItem.setCheckState(Qt.Checked)
            else:
                aItem.setCheckState(Qt.Unchecked)

    def on_listWidget_currentItemChanged(self, current, previous):
        strInfo = ""
        if (current!=None):
            if (previous == None):
                strInfo = "当前:" + current.text()
            else:
                strInfo = "前一项:" + previous.text() + ";当前项:" + current.text()
        self.ui.lineEdit.setText(strInfo)

    def on_listWidget_customContextMenuRequested(self,pos):  ##右键快捷菜单
        menuList=QMenu(self)#创建菜单
        menuList.addAction(self.ui.actList_Ini)
        menuList.addAction(self.ui.actList_Clear)
        menuList.addAction(self.ui.actList_Insert)
        menuList.addAction(self.ui.actList_Append)
        menuList.addAction(self.ui.actList_Delete)
        menuList.addSeparator()
        menuList.addAction(self.ui.actSel_ALL)
        menuList.addAction(self.ui.actSel_None)
        menuList.addAction(self.ui.actSel_Invs)
        menuList.exec(QCursor.pos())#显示菜单

if __name__ == "__main__": ##用于当前窗体测试
    app=QApplication(sys.argv) #创建GUI应用程序
    form=QmyMainWindow() #创建窗体
    form.show()
    sys.exit(app.exec_())

6.appMain.py文件

## GUI应用程序主程序
import sys
from PyQt5.QtWidgets import  QApplication
from myWidget import  QmyMainWindow

app = QApplication(sys.argv) # 创建app，用QApplication类
myWidget = QmyMainWindow() #创建窗体
myWidget.show()
sys.exit(app.exec_())

7.最终效果图