如何为 QTableView 列设置标题标签？

Question

我正在使用 PyQt5 开发一个 Python GUI 应用程序，它有一个用于显示数据的 QTableView。这是代码：import sysfrom PyQt5 import QtWidgets, QtCorefrom PyQt5.QtCore import Qtclass DataModel(QtCore.QAbstractTableModel):    def __init__(self):        super().__init__()        self.data = []    def data(self, index, role):        if role == Qt.DisplayRole:            return self.data[index.row()][index.column()]    def rowCount(self, index):        return len(self.data)    def columnCount(self, index):        return len(self.data[0])class MainWindow(UI.UserInterface):    def __init__(self):        super().__init__()        self.model = DataModel()        self.load()        self.TableView.setModel(self.model)        self.TableView.resizeColumnsToContents()        self.TableView.horizontalHeader().setStretchLastSection(True)    def load(self):        try:            self.model.data = [(1, '2020-01-10 00:00:00', 'KANIA', 'HENRYK', 4219)]        except Exception:            passif __name__ == "__main__":    app = QtWidgets.QApplication(sys.argv)    window = MainWindow()    window.show()    app.exec_()该类UI.UserInterface位于单独的模块中。它具有QWidgets的界面和布局QWidgets。其中之一是QTableView。我似乎找不到一种方法来设置QTableView.我寻找了不同的解决方案（其中一些如下），但没有一个有效：https://doc.qt.io/qt-5/sql-presenting.html（这个是C++写的，不太懂）

Answer 1

您必须实施headerData()：

class DataModel(QtCore.QAbstractTableModel):

    # ...

    def headerData(self, section, orientation, role=QtCore.Qt.DisplayRole):

        if orientation == QtCore.Qt.Horizontal and role == QtCore.Qt.DisplayRole:

            return 'Column {}'.format(section + 1)

        return super().headerData(section, orientation, role)

显然，即使使用包含要显示的标签的简单列表，您也可以设置自己的标签。

请注意，为子类命名新属性时应非常小心，因为它们可能已经存在。

最重要的是，您不应该覆盖self.data.

Answer 2

这是一个使用 QtableView 和一组 headerdata 的示例，您将能够修改 tableview 中的数据

def exemple_table(self):

        database = QSqlDatabase("QPSQL")

        database.setHostName("localhost")

        database.setDatabaseName("database")

        database.setUserName("postgres")

        database.setPassword("password")

        database.open()

        

        model_ft = QSqlTableModel(db=database)

        model_ft.setTable('table')

        

        model_ft.setHeaderData(0, Qt.Horizontal,"id")

        model_ft.setHeaderData(1, Qt.Horizontal,"exemple01")

        model_ft.setHeaderData(2, Qt.Horizontal,"exemple02")

        model_ft.setHeaderData(3, Qt.Horizontal,"exemple03")

        model_ft.setHeaderData(4, Qt.Horizontal,"exemple04")

        model_ft.setHeaderData(5, Qt.Horizontal,"exemple05")

        model_ft.setHeaderData(6, Qt.Horizontal,"exemple06")

        model_ft.setHeaderData(7, Qt.Horizontal,"exemple07")

        

        model_ft.removeColumns(8,1)

        date = str(datetime.date.today())

        

        self.tableView.setModel(model_ft)

        self.tableView.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)

        

        model_ft.setSort(0, Qt.DescendingOrder)

        model_ft.select()

        filter_ft = "date_d ='%s' " % (date_1)

        model_ft.setFilter(filter_ft)

Answer 3

设置列和行名称的覆盖headerData方法QTableAbstractModel

def headerData(self, section: int, orientation: PySide6.QtCore.Qt.Orientation, role: int = ...):

    #for setting columns name

    if orientation == Qt.Horizontal and role == Qt.DisplayRole:

        return f"Column {section + 1}"

    #for setting rows name

    if orientation == Qt.Vertical and role == Qt.DisplayRole:

        return f"Row {section + 1}"

工作代码：

import sys

import requests

import PySide6

from PySide6.QtWidgets import QTableView, QWidget, QApplication, QGridLayout, QHeaderView

from PySide6.QtCore import Qt, QAbstractTableModel

from PySide6.QtGui import QColor, QIcon, QPixmap

from datetime import datetime

class MagicIcon():

    def __init__(self, link):

        self.link = link

        self.icon = QIcon()

        try:

            response = requests.get(self.link)

            pixmap = QPixmap()

            pixmap.loadFromData(response.content)

            self.icon = QIcon(pixmap)

        except:

            pass

class TableModel(QAbstractTableModel):

    def headerData(self, section: int, orientation: PySide6.QtCore.Qt.Orientation, role: int = ...):

        if orientation == Qt.Horizontal and role == Qt.DisplayRole:

            # return f"Column {section + 1}"

            return self.columns[section]

        if orientation == Qt.Vertical and role == Qt.DisplayRole:

            return f"{section + 1}"

    def __init__(self, _data):

        self.columns = ["Account", "Investment", "KYC", "Investment Date"]

        # super().__init__(self)

        super(TableModel, self).__init__()

        self._data = _data

        self.calendarLink = "https://img.icons8.com/fluency/48/000000/windows-calendar.png"

        self.dollarLink = "https://img.icons8.com/external-vitaliy-gorbachev-lineal-color-vitaly-gorbachev/40/000000/external-dollar-currency-vitaliy-gorbachev-lineal-color-vitaly-gorbachev-1.png"

        self.analysis = "https://img.icons8.com/external-flatarticons-blue-flatarticons/65/000000/external-analysis-digital-marketing-flatarticons-blue-flatarticons-1.png"

        self.bug = "https://img.icons8.com/offices/30/000000/bug.png"

        self.account = "https://img.icons8.com/plumpy/24/000000/edit-administrator.png"

        self.approvedLink = "https://img.icons8.com/external-bearicons-flat-bearicons/40/000000/external-approved-approved-and-rejected-bearicons-flat-bearicons-9.png"

        self.rejectedLink = "https://img.icons8.com/external-bearicons-flat-bearicons/40/000000/external-rejected-approved-and-rejected-bearicons-flat-bearicons-11.png"

        self.naLink = "https://img.icons8.com/color/48/000000/not-applicable.png"

        self.calendarIcon = MagicIcon(self.calendarLink).icon

        self.accountIcon = MagicIcon(self.account).icon

        self.dollarIcon = MagicIcon(self.dollarLink).icon

        self.approvedIcon = MagicIcon(self.approvedLink).icon

        self.rejectedIcon = MagicIcon(self.rejectedLink).icon

        self.naIcon = MagicIcon(self.naLink).icon

    def data(self, index, role):

        if role == Qt.DisplayRole:

            value = self._data[index.row()][index.column()]

            if isinstance(value, datetime):

                return value.strftime("%Y-%m-%d")

            if isinstance(value, float):

                return f"{value:.2f}"

            return value

        if role == Qt.TextAlignmentRole:

            return Qt.AlignHCenter + Qt.AlignVCenter

        if role == Qt.BackgroundRole:

            return QColor("#adcdff") if index.row() % 2 == 0 else QColor("#d8ffc2")

        if role == Qt.DecorationRole:

            value = self._data[index.row()][index.column()]

            

            if value is None:

                return self.naIcon

            if isinstance(value, datetime):

                return self.calendarIcon

            if index.column() == 0:

                return self.accountIcon

            if index.column() == 1:

                return self.dollarIcon

            if index.column() == 2:

                if value == True:

                    return self.approvedIcon

                elif value == False:

                    return self.rejectedIcon

                return self.naIcon

    def rowCount(self, index):

        return len(self._data)

    def columnCount(self, index):

        return len(self._data[0])

class MainWindow(QWidget):

    def __init__(self):

        # super().__init__()

        super(MainWindow, self).__init__()

        self.resizeEvent = self.onResize

        self.table = QTableView()

        

        self.setWindowIcon(MagicIcon(

            "https://img.icons8.com/external-flatarticons-blue-flatarticons/65/000000/external-analysis-digital-marketing-flatarticons-blue-flatarticons-1.png"

        ).icon)

        self.table.horizontalHeader().setSectionResizeMode(QHeaderView.Stretch)

        # self.table.setSizeAdjustPolicy(QHeaderView.AdjustIgnored)

        # self.table.verticalHeader().setSectionResizeMode(QHeaderView.Stretch)

        data = [

            ["Andrew Mike", 15.255, True, datetime(2022, 1, 5)],

            ["Eliza Petterson", 353.555, False, datetime(2020, 1, 5)],

            ["Joseph Samuel", 123, None, datetime(2020, 1, 15)],

            ["Nita Singh", 266, True, datetime(2022, 2, 7)],

            ["Rahul Chakrabarti", 102, True, datetime(2019, 10, 15)],

        ]

        self.model = TableModel(data)

        self.table.setModel(self.model)

        self.header = self.table.horizontalHeader()

        # self.header.setSectionResizeMode(0, QHeaderView.Stretch)

        # self.header.setSectionResizeMode(1, QHeaderView.)

        # self.header.setSectionResizeMode(2, QHeaderView.ResizeToContents)

        self.layout = QGridLayout()

        self.layout.addWidget(self.table, 0, 0)

        self.setLayout(self.layout)

    def onResize(self, event):

        # print('old', event.oldSize(), 'new', event.size())

        # super(MainWindow, self).resizeEvent(event)

        pass

if __name__ == "__main__":

    app = QApplication(sys.argv)

    wid = MainWindow()

    wid.show()

    sys.exit(app.exec())