CODEWITHSUNDEEP
pythonqtpyqtpyqt5
Fenikso
Fenikso

Reputation: 9451

Setting font for QTextEdit is ignored for no apparent reason

I am trying to set font of QTextEdit to be the same as of QTreeWidget.

When I get the font from QTextEdit and try to set it to QTreeWidget, it does not work. However, if I create a new font QFont("Segoe UI", 9), which happens to be the same as QTreeWidget has on my platform (Windows 7) and set it to QTextEdit, it works.

The following code prints True for the font comparison, but does not work as expected. Uncommenting the self.text.setFont(new_font) fixes it. Why?

import string
import sys

from PyQt5.QtWidgets import *
from PyQt5.QtGui import QFont


TEXT = string.printable[:-5]

def print_font(font):
    print("Family: {}, Size: {}".format(font.family(), font.pointSize()))


class Window(QWidget):
    def __init__(self, *args, **kwargs):
        QWidget.__init__(self, *args, **kwargs)

        self.list = QTreeWidget(self) 
        self.list.addTopLevelItem(QTreeWidgetItem((TEXT,)))
        self.list.setRootIsDecorated(False)
        self.list.setHeaderHidden(True)
        self.list.setMinimumHeight(25)

        self.text = QTextEdit(self)
        self.text.setText(TEXT)
        self.text.setMinimumHeight(25)

        self.layout = QGridLayout()
        self.layout.setContentsMargins(5, 5, 5, 5)
        self.layout.addWidget(self.list)
        self.layout.addWidget(self.text)

        self.resize(620, 20)
        self.setLayout(self.layout)
        self.show()

        list_font = self.list.font()
        new_font = QFont("Segoe UI", 9)
        print(list_font == new_font)
        self.text.setFont(list_font)
#         self.text.setFont(new_font)

        print_font(self.list.font())
        print_font(self.text.font())


app = QApplication(sys.argv)
win = Window()
sys.exit(app.exec_())

Upvotes: 3

Views: 1708

Answers (1)

ekhumoro
ekhumoro

Reputation: 120578

You can't safely assume that the properties reported by QFont are the same as those that are actually used. They may be, but it's not guaranteed.

To safely get the actual values used, you need to use QFontInfo. On Linux, I get different values from QFont and QFontInfo, but the font transfer succeeds; on Windows, they're the same, but the transfer fails. Huh.

Anyway, there seems to be some issue with copying fonts on Windows, but I'm unable to diagnose exactly what it might be. Something to do with the font-cache, maybe?

I thought that:

    list_font = QFont(self.list.font())

might make a difference - but it doesn't. In the end, the only thing that worked for me on Windows was this:

    list_font = QFont()
    list_font.fromString(self.list.font().toString())
    self.text.setFont(list_font)

Upvotes: 4

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