主页 / 问题 / 1600638
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Gold_boomber
Asked:2024-11-23 21:03:39 +0000 UTC2024-11-23 21:03:39 +0000 UTC

如何使用一个 QLineEdit 的数据更新三个 QLabels？

  • 772

有一个字段label_1_line_edit = QLineEdit()，向其中插入数据时：

  • 第一个label_1_label_total = QLabel()数字应该增加5，
  • 在第二个label_2_label_total = QLabel()数字应该减少2，
  • 在第三个中，label_3_label_total = QLabel()数字应增加10。

主要.py

import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QApplication, QMainWindow, QWidget, QLabel, QGridLayout, QLineEdit)

class MyWidget(QWidget):
    def __init__(self):
        super().__init__()
        # hour counts
        self.data_5 = 10
        self.label_1 = QLabel()
        self.label_1.setAlignment(Qt.AlignLeft)
        self.label_1.setText('Поле1')
        self.label_1.setStyleSheet(
            "color: #1E5F74; font: 20pt;")
        self.label_1_label_total = QLabel()
        self.label_1_label_total.setAlignment(Qt.AlignLeft)
        self.label_1_label_total.setStyleSheet(
            "color: #1E5F74; font: 20pt;")
        self.label_1_line_edit = QLineEdit()
        self.label_1_line_edit.setPlaceholderText('Введите число')
        self.label_1_line_edit.setMaxLength(2)
        self.label_1_line_edit.textChanged.connect(self.label_count)  # Реагируем на события изменения текста
        layout = QGridLayout()
        self.setLayout(layout)
        layout.addWidget(self.label_1, 0, 0)
        layout.addWidget(self.label_1_label_total, 0, 2)
        layout.addWidget(self.label_1_line_edit, 0, 1)
        # layout.addWidget(self.label_2_label_total, 1, 2)
        # layout.addWidget(self.label_3_label_total, 2, 2)

    def label_count(self, text):
        try:
            self.number = int(text)
            self.label_1_label_total.setNum(self.number + self.data_5)
        except Exception as e:
            return


if __name__ == "__main__":
    app = QApplication(sys.argv)
    widget = MyWidget()
    widget.resize(200, 150)
    widget.show()
    sys.exit(app.exec())
python

1 个回答

  1. Best Answer

    我看到你的任务是这样的：

    import sys
from PyQt5.QtCore import Qt
from PyQt5.QtWidgets import (QApplication, QFormLayout, 
    QWidget, QLabel, QGridLayout, QLineEdit)


class MyWidget(QWidget):
    def __init__(self):
        super().__init__()
        
        # hour counts
        self.data_5 = 5
        self.data_2 = 2
        self.data_10 = 10

        self.label_1_label_total = QLabel(objectName='label_1',
            alignment=Qt.AlignCenter)
        self.label_2_label_total = QLabel(objectName='label_2',
            alignment=Qt.AlignCenter)
        self.label_3_label_total = QLabel(objectName='label_3',
            alignment=Qt.AlignCenter)
            
        self.label_1_line_edit = QLineEdit()
        self.label_1_line_edit.setPlaceholderText('Введите число')
        self.label_1_line_edit.setMaxLength(2)
        self.label_1_line_edit.textChanged.connect(self.label_count)  

        layout = QFormLayout(self)
        layout.addRow(QLabel("Поле1:"), self.label_1_label_total)
        layout.addRow(QLabel("Поле2:"), self.label_2_label_total)
        layout.addRow(QLabel("Поле3:"), self.label_3_label_total)
        layout.addRow(self.label_1_line_edit)
        
    def label_count(self, text):
        try:
            self.number = int(text)
            self.label_1_label_total.setNum(self.number + self.data_5)
            self.label_2_label_total.setNum(self.number + self.data_2)
            self.label_3_label_total.setNum(self.number + self.data_10)
        except Exception as e:
            return


Stylesheet = '''
QLabel {
    color: #1E5F74; 
    font: 15pt;
}
#label_1, #label_2, #label_3 {
    color: #1E5F74; 
    font: 20pt; 
} 
QLineEdit {
    font: 13pt; 
}               
'''

if __name__ == "__main__":
    app = QApplication(sys.argv)
    app.setStyleSheet(Stylesheet) 
    widget = MyWidget()
    widget.resize(200, 150)
    widget.show()
    sys.exit(app.exec())

    在此输入图像描述

    更新：

    在第二个 QLabel 中，数字应该уменьшится是2-self.label_2_label_total.setNum(self.number + self.data_2

    ...

    self.label_2_label_total.setNum(self.number - self.data_2)

...

    在此输入图像描述

    • 1

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