PyQt5 QSpinBox - Setting Hinting Preference

PyQt5 QSpinBox - Setting Hinting Preference

In PyQt5, the QFont class provides the setHintingPreference() method to control the type of hinting to use when rendering text. Hinting is the process of adjusting glyphs to better fit the pixel grid of the output device, improving legibility.

However, directly setting hinting preferences for a widget like QSpinBox requires you to set it for the font that the widget uses.

Here's a simple example to set the hinting preference for a QSpinBox:

import sys
from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QSpinBox
from PyQt5.QtGui import QFont

class App(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        layout = QVBoxLayout(self)

        spinbox = QSpinBox(self)

        # Fetch the current font of the spinbox
        font = spinbox.font()

        # Set the hinting preference
        font.setHintingPreference(QFont.PreferVerticalHinting)

        # Apply the font back to the spinbox
        spinbox.setFont(font)

        layout.addWidget(spinbox)
        
        self.setLayout(layout)
        self.setWindowTitle('QSpinBox Hinting Preference')
        self.show()

if __name__ == '__main__':
    app = QApplication(sys.argv)
    ex = App()
    sys.exit(app.exec_())

In the above code:

  • QFont.PreferVerticalHinting is just one of the hinting options. Other available hinting preferences include:
    • QFont.PreferDefaultHinting
    • QFont.PreferNoHinting
    • QFont.PreferFullHinting

You can choose any of these based on your requirements. Adjusting hinting might lead to variations in text clarity depending on the display and size of the text, so it's best to experiment and see which setting looks the best for your specific application and display.

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