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# Copyright (C) 2022 The Qt Company Ltd.
# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
from PySide6.QtCore import Qt, qVersion, qFuzzyCompare
from PySide6.QtGui import QGuiApplication, QFontDatabase
from PySide6.QtWidgets import (QDialog, QDialogButtonBox,
QPlainTextEdit, QVBoxLayout)
def _format_font(font):
family = font.family()
size = font.pointSizeF()
return f"{family}, {size}pt"
class FontInfoDialog(QDialog):
def __init__(self, parent):
super().__init__(parent)
self.setWindowFlags(self.windowFlags() & ~Qt.WindowContextHelpButtonHint)
main_layout = QVBoxLayout(self)
text_edit = QPlainTextEdit(self.text(), self)
text_edit.setReadOnly(True)
text_edit.setFont(QFontDatabase.systemFont(QFontDatabase.FixedFont))
main_layout.addWidget(text_edit)
button_box = QDialogButtonBox(QDialogButtonBox.Close, self)
button_box.rejected.connect(self.reject)
main_layout.addWidget(button_box)
def text(self):
default_font = QFontDatabase.systemFont(QFontDatabase.GeneralFont)
fixed_font = QFontDatabase.systemFont(QFontDatabase.FixedFont)
title_font = QFontDatabase.systemFont(QFontDatabase.TitleFont)
smallest_readable_font = QFontDatabase.systemFont(QFontDatabase.SmallestReadableFont)
v = qVersion()
platform = QGuiApplication.platformName()
dpi = self.logicalDpiX()
dpr = self.devicePixelRatio()
text = f"Qt {v} on {platform}, {dpi}DPI"
if not qFuzzyCompare(dpr, float(1)):
text += f", device pixel ratio: {dpr}"
text += ("\n\nDefault font : " + _format_font(default_font)
+ "\nFixed font : " + _format_font(fixed_font)
+ "\nTitle font : " + _format_font(title_font)
+ "\nSmallest font: " + _format_font(smallest_readable_font))
return text
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