实例1
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QMainWindow, QMessageBox, QApplication, QWidget, QVBoxLayout, QPushButton, QListWidget, QListWidgetItemclass ListWidgetDemo(QMainWindow):def __init__(self, parent=None):super().__init__(parent) # 调用父类的构造函数，创建QWidget窗体self.setWindowTitle("QListWidget 例子")self.resize(300, 270)self.listwidget = QListWidget()self.listwidget.resize(300, 120)self.listwidget.addItem("item1")self.listwidget.addItem("item2")self.listwidget.addItem("item3")self.listwidget.addItem("item4")self.listwidget.addItem("item5")self.setCentralWidget(self.listwidget)self.listwidget.itemClicked.connect(self.clicked)def clicked(self, index):QMessageBox.information(self, "QListWidget", "您选择了：" + self.listwidget.item(self.listwidget.row(index)).text())if __name__ == '__main__':app = QApplication(sys.argv)myMain = ListWidgetDemo()myMain.show()sys.exit(app.exec_())
实例2
import sys
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QIcon
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QPushButton, QListWidget, QListWidgetItemclass QmyWidget(QWidget):def __init__(self, parent=None):super().__init__(parent) # 调用父类的构造函数，创建QWidget窗体self.setupUi()def setupUi(self):"""页面初始化"""# 设置窗体大小及标题self.resize(500, 400)self.setWindowTitle("QListWidget组件示例")# 创建布局self.layout = QVBoxLayout()# 创建QListWidget组件self.listWidget = QListWidget()self.listWidget.addItem("Item 1") # 添加itemself.listWidget.addItem("Item 2")self.listWidget.addItem("Item 3")self.listWidget.addItem("Item 4")# self.listWidget.addItems(["Item 1", "Item 2", "Item 3", "Item 4"]) # 添加多个item# QListWidget组件绑定信号self.listWidget.itemClicked.connect(self.on_listWidget_itemClicked)self.listWidget.itemChanged.connect(self.on_listWidget_itemChanged)self.listWidget.itemDoubleClicked.connect(self.on_listWidget_itemDoubleClicked)# 创建两个按钮组件self.button1 = QPushButton("新增Item", self)self.button1.clicked.connect(self.insert_item) # 为button绑定槽函数self.button2 = QPushButton("删除Item", self)self.button2.clicked.connect(self.delete_item) # 为button绑定槽函数self.button3 = QPushButton("查询Item", self)self.button3.clicked.connect(self.select_item) # 为button绑定槽函数self.button4 = QPushButton("修改Item", self)self.button4.clicked.connect(self.change_item) # 为button绑定槽函数# 将组件添加到布局中self.layout.addWidget(self.listWidget)self.layout.addWidget(self.button1)self.layout.addWidget(self.button2)self.layout.addWidget(self.button3)self.layout.addWidget(self.button4)# 为窗体添加布局self.setLayout(self.layout)def insert_item(self):"""新增item槽函数"""print("item新增成功！")# 方式一：新增文本itemself.listWidget.insertItem(0, "Item Text")# 方式二：新增QListWidgetItem对象itemitem_new = QListWidgetItem()item_new.setText("Item Obj") # 为item设置文本item_new.setCheckState(False) # 为item设置复选状态，不勾选item_new.setIcon(QIcon("logo.png")) # 为item设置图标item_new.setFlags(Qt.ItemIsEnabled | Qt.ItemIsEditable | Qt.ItemIsUserCheckable) # 为item设置标志self.listWidget.insertItem(0, item_new)# 方式三：新增其他部件的itemitem_button = QListWidgetItem()button = QPushButton("Button")self.listWidget.insertItem(0, item_button)self.listWidget.setItemWidget(item_button, button) # 为item设置按钮部件def delete_item(self):"""删除item槽函数"""print("item删除成功！")# 方式一：按行索引删除item对象self.listWidget.takeItem(0)# 方式一：按item对象删除item的小部件current_item = self.listWidget.currentItem()self.listWidget.removeItemWidget(current_item)def select_item(self):"""查询item槽函数"""print("item查询成功！")# 隐藏所有的列表项for i in range(4):self.listWidget.item(i).setHidden(True)# 查询Item 1并取消隐藏item_list = self.listWidget.findItems("Item 1", Qt.MatchContains | Qt.MatchRecursive)for item in item_list:item.setHidden(False)def change_item(self):self.listWidget.item(0).setText('修改了第一行的值')def on_listWidget_itemClicked(self, item):"""槽函数"""print('itemClicked信号：', item.text())def on_listWidget_itemChanged(self, item):print('itemChange信号：', item.text())def on_listWidget_itemDoubleClicked(self, item):print('双击信号：', item.text())if __name__ == '__main__':app = QApplication(sys.argv)myMain = QmyWidget()myMain.show()sys.exit(app.exec_())
