PyQt5 QSpinBox - Getting ascent of the font

PyQt5 QSpinBox - Getting ascent of the font

To get the ascent of the font used in a QSpinBox (or any other QWidget), you'll use the QFontMetrics class. The ascent of a font is the distance from the baseline of the font to the top of the highest character.

Here's a step-by-step guide:

  1. Get the font used in the QSpinBox.
  2. Obtain the QFontMetrics object for that font.
  3. Use the ascent() method of the QFontMetrics object to get the ascent.

Here's a simple example to demonstrate how to do it:

import sys from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QSpinBox, QLabel from PyQt5.QtGui import QFontMetrics class MyApp(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): layout = QVBoxLayout() spinBox = QSpinBox(self) layout.addWidget(spinBox) # Get the font of the QSpinBox font = spinBox.font() # Get the QFontMetrics object font_metrics = QFontMetrics(font) # Get the ascent ascent = font_metrics.ascent() # Display the ascent in a label label = QLabel(f"Font ascent: {ascent} pixels", self) layout.addWidget(label) self.setLayout(layout) self.setWindowTitle('QSpinBox Font Ascent Example') self.show() if __name__ == '__main__': app = QApplication(sys.argv) ex = MyApp() sys.exit(app.exec_())

In this example, a QSpinBox and a QLabel are added to a QWidget. The ascent of the font used in the QSpinBox is calculated and then displayed in the QLabel.

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