如何通过在 PyQt5 中按 Enter 键从 QTableView 获取数据

Question

我正在使用 PyQt5 制作应用程序并遇到一些麻烦。我想通过按 Enter 键从 QTableView 中选择数据并将其显示在 QLineEdit 中。我已经用 doubleClicked 信号完成了这些事情，但我仍然想通过两种方式向 QLineEdit 显示数据，然后在按下 Enter 键或双击后立即关闭 QTableView 对话框。 这是我的代码：

import sys 
import os
from PyQt5 import QtCore, QtGui, QtWidgets, uic


class Application(QtWidgets.QMainWindow):
    def __init__(self):
        super(Application, self).__init__()
        self.mainwindow = uic.loadUi('test.ui', self)

        self.mainwindow.pushButton.clicked.connect(self.table)

    def table(self):
        self.table = QtWidgets.QTableView()

        data = [
            [2, 3, 5], 
            [23, 4, 5],
            [2, 6, 7],
            [0, 3, 5]
        ]

        self.model = TableModel(data)
        self.table.setModel(self.model)

        self.table.doubleClicked.connect(self.on_click)

        self.table.show()

    def on_click(self, signal):
        row = signal.row()  # RETRIEVES ROW OF CELL THAT WAS DOUBLE CLICKED
        column = signal.column()  # RETRIEVES COLUMN OF CELL THAT WAS DOUBLE CLICKED
        cell_dict = self.model.itemData(signal)  # RETURNS DICT VALUE OF SIGNAL
        cell_value = cell_dict.get(0)  # RETRIEVE VALUE FROM DICT

        index = signal.sibling(row, 0)
        index_dict = self.model.itemData(index)
        index_value = index_dict.get(0)
        print(
            'Row {}, Column {} clicked - value: {}\n'.format(row, column, cell_value))

        self.mainwindow.lineEdit.setText('%s' %cell_value)

class TableModel(QtCore.QAbstractTableModel):
    def __init__(self, data):
        super(TableModel, self).__init__()
        self._data = data

    def data(self, index, role):
        if role == QtCore.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])

if __name__ == '__main__':
    application = QtWidgets.QApplication(sys.argv)
    window = Application()
    window.show()
    application.exec_()

还有我的桂：

让我解释一下：当点击按钮时，它会显示一个数据表，然后我想通过按回车键选择表中的数据，然后它将数据显示到 QlineEdit 并关闭表

Answer 1

逻辑是检测按键，例如使用eventFilter，然后获取被选元素的QModelIndex：

class Application(QtWidgets.QMainWindow):
    def __init__(self):
        super(Application, self).__init__()
        uic.loadUi("test.ui", self)

        self.pushButton.clicked.connect(self.table)

        self.table = QtWidgets.QTableView()
        self.table.doubleClicked.connect(self.write_text)
        self.table.installEventFilter(self)

    def table(self):
        data = [[2, 3, 5], [23, 4, 5], [2, 6, 7], [0, 3, 5]]
        self.model = TableModel(data)
        self.table.setModel(self.model)
        self.table.show()

    def write_text(self, index):
        row, column, cell_value = index.row(), index.column(), index.data()
        print("Row {}, Column {} clicked - value: {}".format(row, column, cell_value))
        self.lineEdit.setText("%s" % cell_value)
        self.table.close()

    def eventFilter(self, obj, event):
        if obj is self.table and event.type() == QtCore.QEvent.KeyPress:
            if event.key() in (QtCore.Qt.Key_Return, QtCore.Qt.Key_Enter):
                indexes = self.table.selectedIndexes()
                if indexes:
                    self.write_text(indexes[0])
        return super(Application, self).eventFilter(obj, event)