Question

我正在开发一个应用程序，用户可以在其中选择多个 (<=5) 行进行预览。我在 QTableView 中使用了 QSqlTableModel。

为了检索数据，我使用了以下代码行：

out = (self.model.record(self.view.selectionModel().selectedIndexes()  [0].row()).value("NAME"))
    print(out)

它给了我行值。但有一些主要问题：

如果我选中复选框并取消选中。尽管如此，它仍将其视为已选中。
如果我选择 n 复选框，它只给出第 n 个选择。简而言之，多项选择不起作用。

我假设我必须创建一个循环。但我无法构建解决方案。

完整代码如下：

import sys

from PyQt5 import QtCore, QtWidgets
from PyQt5.QtWidgets import QVBoxLayout, QPushButton
from PyQt5 import QtGui
from PyQt5.QtCore import Qt, QModelIndex
from PyQt5.QtSql import QSqlDatabase, QSqlTableModel, QSqlQuery
from PyQt5.QtWidgets import (QApplication, QMainWindow, QMessageBox, QTableView,  QPushButton, QGridLayout, QGroupBox, QVBoxLayout)
from PyQt5 import QtCore
from PyQt5.QtCore import pyqtSignal


class RealMainWindow(QMainWindow):
    def __init__(self, parent=None):
        super().__init__(parent)

        self.setWindowTitle("QTableView Example")
        self.resize(415, 200)
        # Set up the model
        self.button = QPushButton("check", self)
        self.button.clicked.connect(self.selected)
        self.button.move(1000, 1110)

        self.model = TableModel(self)
        self.model.setTable("Table2")
        self.model.setEditStrategy(QSqlTableModel.OnFieldChange)
        #self.model.setHeaderData(0, Qt.Horizontal, "ID")


        self.model.select()
        # Set up the view
        self.view = QTableView()
        self.view.setModel(self.model)
        #self.view.resizeColumnsToContents()

        central_widget = QtWidgets.QWidget()
        self.setCentralWidget(central_widget)
        lay = QVBoxLayout(central_widget)
        lay.addWidget(self.button)
        lay.addWidget(self.view)


     def selected(self):
        out = (self.model.record(self.view.selectionModel().selectedIndexes()[0].row()).value("NAME"))
        print(out)
        


class TableModel(QSqlTableModel):
    def __init__(self, *args, **kwargs):
        QSqlTableModel.__init__(self, *args, **kwargs)
        self.checkeable_data = {}

    def flags(self, index):
        fl = QSqlTableModel.flags(self, index)
        if index.column() == 0:
            fl |= Qt.ItemIsUserCheckable
        return fl

    def data(self, index, role=Qt.DisplayRole):
        if role == Qt.CheckStateRole and (
            self.flags(index) & Qt.ItemIsUserCheckable != Qt.NoItemFlags
        ):
            if index.row() not in self.checkeable_data.keys():
                self.setData(index, Qt.Unchecked, Qt.CheckStateRole)
            return self.checkeable_data[index.row()]
        else:
            return QSqlTableModel.data(self, index, role)

    def setData(self, index, value, role=Qt.EditRole):
        if role == Qt.CheckStateRole and (
            self.flags(index) & Qt.ItemIsUserCheckable != Qt.NoItemFlags
         ):
            self.checkeable_data[index.row()] = value
            self.dataChanged.emit(index, index, (role,))
            return True
        return QSqlTableModel.setData(self, index, value, role)


def createConnection():

    con = QSqlDatabase.addDatabase("QSQLITE")
    con.setDatabaseName("ppcp_database.db")
    if not con.open():
        QMessageBox.critical(
            None,
            "QTableView Example - Error!",
            "Database Error: %s" % con.lastError().databaseText(),
        )
        return False
    return True

app = QApplication(sys.argv)
if not createConnection():
sys.exit(1)
win = RealMainWindow()
win.show()
sys.exit(app.exec_())

Answer 1

复选框的状态与选择混淆。在您的情况下，您必须遍历 checkeable_data 并验证它是否被选中：

def selected(self):
    names = []
    for row, is_checked in self.model.checkeable_data.items():
        if is_checked:
            record = self.model.record(row)
            name = record.value("NAME")
            names.append(name)
    print(names)

如何使用QTableView中的选中复选框检索多行

1 个答案: