主页 / 问题 / 1559038
Accepted
Djony Cooper
Asked:2023-12-26 22:30:42 +0000 UTC2023-12-26 22:30:42 +0000 UTC

从动态生成的 PyQt 小部件中提取数据

  • 772

如何从PyQT5 / PyQT6QLineEdit中动态生成的文本获取文本？ 我只能从最后创建的小部件中提取文本，但我想检查所有创建的小部件并提取所有不为空的数据 - 并将数据排列到列表中。
QLineEdit

这是一个最低限度可重现的示例：

import sys
from PyQt6.QtWidgets import QWidget, QApplication, QGridLayout, QHBoxLayout, QPushButton, QLineEdit


class Main(QWidget):
    def __init__(self):
        super().__init__()
        self.row_counter = 0
        self.le = ''
        self.grid = QGridLayout()
        self.grid_line_url = QGridLayout()
        self.grid.addLayout(self.generate_line_url(), 0, 0)
        self.grid.addWidget(self.push_button(name='ok!',
                                        do=self.text_from_line_edit), 1, 0)
        self.setLayout(self.grid)

    def h_box(self, *args):
        box = QHBoxLayout()
        if args:
            for widget in args:
                box.addWidget(widget)
        return box

    def push_button(self, width=None, height=None, name=None, do=None):
        but = QPushButton()
        if width is not None and height is not None:
            but.setFixedSize(width, height)
        if name:
            but.setText(name)
        if do:
            but.clicked.connect(do)
        return but

    def line_edit(self):
        self.le = QLineEdit()
        self.le.setFixedHeight(30)
        return self.le

    def generate_line_url(self):
        self.grid_line_url.addLayout(self.h_box(self.line_edit(),
                                           self.push_button(width=30,
                                                       height=30,
                                                       name='+',
                                                       do=self.generate_line_url)), self.row_counter, 0, 1, 3)
        self.row_counter += 1
        return self.grid_line_url



    def text_from_line_edit(self):
        print(self.le.text())


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = Main()
    w.show()
    sys.exit(app.exec())
python

2 个回答

  1. Best Answer

    你写的东西很奇怪，但它有效。

    模板 QList QObject:: findChildren (const QString &name, >Qt::FindChildOptions options = Qt::FindChildrenRecursively) const

    ...

    此示例返回作为父 Widget 子级的所有 QPushButton：

    QList<QPushButton *> allPButtons = parentWidget.findChildren<QPushButton *>();

    ...

    主要.py

    import sys
'''
from PyQt6.QtWidgets import QWidget, QApplication, QGridLayout, \
    QHBoxLayout, QPushButton, QLineEdit
'''
from PyQt5.Qt import *


class Main(QWidget):
    def __init__(self):
        super().__init__()
        
        self.row_counter = 0
        self.le = ''
        self.lineEdits = []                                                  # +
        
        self.grid = QGridLayout()
        self.grid_line_url = QGridLayout()
        self.grid.addLayout(self.generate_line_url(), 0, 0)
        self.grid.addWidget(self.push_button(
            name='ok!',
            do=self.text_from_line_edit), 1, 0)
        self.setLayout(self.grid)

    def h_box(self, *args):
        box = QHBoxLayout()
        if args:
            for widget in args:
                box.addWidget(widget)
        return box

    def push_button(self, width=None, height=None, name=None, do=None):
        but = QPushButton()
        if width is not None and height is not None:
            but.setFixedSize(width, height)
        if name:
            but.setText(name)
        if do:
            but.clicked.connect(do)
        return but

    def line_edit(self):
# -----> vvvv <-------------- self, при динамически создаваемых объектах - не нужен
#        self.le = QLineEdit()
        le = QLineEdit()
        le.setObjectName(f'le_{self.row_counter}')                           # +
        le.setFixedHeight(30)
        return le

    def generate_line_url(self):
        self.grid_line_url.addLayout(
            self.h_box(self.line_edit(),
                       self.push_button(
                           width=30,
                           height=30,
                           name='+',
                           do=self.generate_line_url
                       )
            ), self.row_counter, 0, 1, 3)
        self.row_counter += 1
        return self.grid_line_url

    def text_from_line_edit(self):
        self.lineEdits =  self.findChildren(QLineEdit)                   # !!! +++ 
        for lineEdit in self.lineEdits:                                  # !!! +++ 
            print(f'{lineEdit.objectName()}: {lineEdit.text()}')


if __name__ == '__main__':
    app = QApplication(sys.argv)
    w = Main()
    w.show()
    sys.exit(app.exec())

    在此输入图像描述

    • 1

  2. 此外，还提出了此方法作为解决方案，以防有人发现它有用：

    def text_from_line_edit(self):
    url_box = []
    for i in self.children():
        if type(i).__name__=='QLineEdit' and i.text() != '':
               url_box.append(i.text())
    print(url_box)
    • 0

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