1 files changed, 47 insertions, 0 deletions
diff --git a/examples/widgets/widgets/charactermap/fontinfodialog.py b/examples/widgets/widgets/charactermap/fontinfodialog.py
new file mode 100644
index 000000000..aa874884f
--- /dev/null
+++ b/examples/widgets/widgets/charactermap/fontinfodialog.py
@@ -0,0 +1,47 @@
+# 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