PyQt5 QDoubleSpinBox - Getting Maximum Possible Value

PyQt5 QDoubleSpinBox - Getting Maximum Possible Value

In PyQt5, the QDoubleSpinBox widget is a spin box that allows the user to select floating-point values. This widget has a range defined by its minimum and maximum values.

To get the maximum possible value that a QDoubleSpinBox can hold, you can use the maximum() method.

Here's a simple example demonstrating how to retrieve the maximum value of a QDoubleSpinBox widget:

import sys from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QDoubleSpinBox, QLabel class DoubleSpinBoxDemo(QWidget): def __init__(self): super().__init__() layout = QVBoxLayout() self.spinBox = QDoubleSpinBox(self) layout.addWidget(self.spinBox) self.label = QLabel(self) layout.addWidget(self.label) self.setLayout(layout) self.update_max_value() # Connect spinBox's valueChanged signal to update the label self.spinBox.valueChanged.connect(self.update_max_value) def update_max_value(self): max_value = self.spinBox.maximum() self.label.setText(f"Maximum possible value: {max_value}") app = QApplication(sys.argv) window = DoubleSpinBoxDemo() window.show() sys.exit(app.exec_())

In the example above, after initializing the QDoubleSpinBox widget, the update_max_value method is called to retrieve the maximum possible value and update the label to display the result.

You can also set a custom maximum value using the setMaximum() method if needed. For instance, self.spinBox.setMaximum(100.5) would set the maximum allowable value to 100.5.

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