Pyqt5查找QlistWidgetItem的行

Question

我有一个自定义小部件，它有一个与之相关联的按钮。QlistWay上的自定义窗口小部件是什么？在

文件

主_图形用户界面.py在

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(353, 237)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.listWidget = QtWidgets.QListWidget(self.centralwidget)
        self.listWidget.setObjectName("listWidget")
        self.gridLayout.addWidget(self.listWidget, 0, 0, 1, 1)
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setObjectName("pushButton")
        self.gridLayout.addWidget(self.pushButton, 1, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 353, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        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.pushButton.setText(_translate("MainWindow", "Add Item"))

自定义小部件_图形用户界面.py在

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在自定义控件.py在

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


class SignalsObject(QObject):
    listWidgetCurrentIndex = pyqtSignal(str)

class CustomListEntry(QWidget):

    def __init__(self, parent=None):
        QWidget.__init__(self,parent)
        self.CustomUi = Ui_Table_Widget_Insert()
        self.CustomUi.setupUi(self)
        self.setUpMainUiFunction()
        self.signals = SignalsObject()

    def setUpMainUiFunction(self):
        self.CustomUi.pushButton.clicked.connect(self.rowNumber)

    def setlabel(self,label):
        self.CustomUi.label.setText(label)

    def setButtonName(self,name):
        self.CustomUi.pushButton.setObjectName(name)

    def rowNumber(self):
        sender = self.sender()
        name = sender.objectName().split("__")
        entryNumber = name[1]

        self.signals.listWidgetCurrentIndex.emit(entryNumber)

在主.py在

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

from CustomWidget import *




class MainWindow(QMainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        QWidget.__init__(self, parent)
        self.MainUi = Ui_MainWindow()
        self.MainUi.setupUi(self)
        self.setUpMainUiFunction()
        self.listEntryNumber = 0


    def setUpMainUiFunction(self):
        self.MainUi.pushButton.clicked.connect(self.addCustomEntry)


    def addCustomEntry(self):
        self.listEntryNumber = self.listEntryNumber + 1

        CustomWidget = CustomListEntry()
        CustomWidget.setObjectName("entry"+str(self.listEntryNumber))

        CustomWidget.setlabel("Entry Number= "+str(self.listEntryNumber))

        CustomWidget.signals.listWidgetCurrentIndex.connect(self.findListIndex)

        CustomWidget.setButtonName("button__"+ str(self.listEntryNumber))

        myQListWidgetItem = QListWidgetItem(self.MainUi.listWidget)
            #pdb.set_trace()
        myQListWidgetItem.setSizeHint(CustomWidget.sizeHint())

        self.MainUi.listWidget.addItem(myQListWidgetItem)
        self.MainUi.listWidget.setItemWidget(myQListWidgetItem, CustomWidget)

    def findListIndex(self,entryNumber):
        print(entryNumber)
        # items = self.MainUi.feederSchedule_listWidget.findItems("entry"+entryNumber,Qt.MatchExactly)
        items = self.MainUi.listWidget.findChildren(CustomListEntry,"entry"+entryNumber)
        # item = self.MainUi.feederSchedule_listWidget.findItems(items, Qt.MatchRegExp)
        if len(items) > 0:
            for item in items:
                print ("row number of found item =",self.MainUi.listWidget.row(item))


if __name__ == "__main__":
    #os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = MainWindow()
    MainWindow.show()
    sys.exit(app.exec_())

我可以看到它能够找到QListWidget中的所有项，但我似乎无法将我的自定义对象与列出的对象之一匹配。这就是我被困在能找到那一排的地方。在我的实际程序中，我将删除行。条目号必须与行号分开

Answer 1

在这种情况下，最好实现一个允许您获取行的定制QListWidget，小部件不应该知道它属于哪一行，但是listwidget应该知道它。在

因此，我将创建以下自定义QListWidget，它会发出单击的小部件信号，指示发出单击信号的小部件的行号：

clickablelistwidget.py

from PyQt5 import QtCore, QtWidgets

class ClickableListWidget(QtWidgets.QListWidget):
    clicked_widget = QtCore.pyqtSignal(int)

    def append_widget(self, widget_clickable):
        item = QtWidgets.QListWidgetItem()
        self.addItem(item)
        item.setSizeHint(widget_clickable.sizeHint())
        self.setItemWidget(item, widget_clickable)
        if hasattr(widget_clickable, "clicked"):
            if isinstance(widget_clickable.clicked, QtCore.pyqtBoundSignal):
                widget_clickable.clicked.connect(self.on_clicked)

    @QtCore.pyqtSlot()
    def on_clicked(self):
        widget = self.sender()
        gp = widget.mapToGlobal(QtCore.QPoint())
        lp = self.viewport().mapFromGlobal(gp)
        item = self.itemAt(lp)
        row = self.row(item)
        self.clicked_widget.emit(row)

然后修改主_图形用户界面.py将QListWidget替换为新类的文件：

Main_图形用户界面.py

^{pr2}$

您的自定义小部件将被修改，以便在按下按钮时发出单击的信号：

自定义控件.py

import sys
from PyQt5 import QtCore, QtWidgets
from CustomWidget_GUI import Ui_Table_Widget_Insert

class CustomListEntry(QtWidgets.QWidget, Ui_Table_Widget_Insert):
    clicked = QtCore.pyqtSignal()

    def __init__(self, parent=None):
        super(CustomListEntry, self).__init__(parent)
        self.setupUi(self)
        self.setUpMainUiFunction()

    def setUpMainUiFunction(self):
        self.pushButton.clicked.connect(self.clicked)

    def setlabel(self,label):
        self.label.setText(label)

现在可以在主文件中使用：

主.py

import sys
from PyQt5 import QtCore, QtWidgets
from Main_GUI import Ui_MainWindow
from CustomWidget import CustomListEntry

class MainWindow(QtWidgets.QMainWindow, Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainWindow, self).__init__(parent)
        self.setupUi(self)
        self.setUpMainUiFunction()

    def setUpMainUiFunction(self):
        self.pushButton.clicked.connect(self.addCustomEntry)
        self.listWidget.clicked_widget.connect(self.on_clicked_widget)

    @QtCore.pyqtSlot()
    def addCustomEntry(self):
        listEntryNumber = self.listWidget.count()
        custom_widget = CustomListEntry()
        custom_widget.setlabel("Entry Number= {}".format(listEntryNumber))
        self.listWidget.append_widget(custom_widget)

    @QtCore.pyqtSlot(int)
    def on_clicked_widget(self, row):
        print("row number of found item = {}".format(row))

if __name__ == "__main__":
    #os.environ["QT_AUTO_SCREEN_SCALE_FACTOR"] = "1"
    app = QtWidgets.QApplication(sys.argv)
    MainWindow = MainWindow()
    MainWindow.show()
    sys.exit(app.exec_())

最后，文件夹必须具有以下结构：

├── clickablelistwidget.py
├── CustomListWidget.py
├── CustomWidget_GUI.py
├── CustomWidget.py
├── Main_GUI.py
└── Main.py

---

这种方法的优点是它可以分离类，使其易于重用。您不必求助于objectName或将QListWidgetItem注入到小部件中，如果我们有许多类型的小部件，这可能会很乏味。:-). 在