PyQt5: Center align a label

Question

This should be really simple but I just can't find an answer for this. I've tried this PyQt4 code:

label.setAlignment(Qt.AlignCenter)

But that does not work.

Do any of the other alignment flags work? For instance, can you right align the label (using `Qt.AlignRight`), or bottom align the label (using `Qt.AlignBottom`)? — three_pineapples, Sep 03 '14 at 07:21
Works for me like a charm. But I use PySide, maybe PyQt4 has a problem there although unlikely. — NoDataDumpNoContribution, Sep 03 '14 at 07:24
Maybe it's a bug in PyQt5. Stylesheets might be a workaround. — NoDataDumpNoContribution, Sep 03 '14 at 07:32
@Trilarion I've tried to find out how to do aligning with stylesheets in PyQt5 but I can't find an answer >_ — Lachlan, Sep 03 '14 at 07:35
I am not sure, but maybe, is your QLabel widget big enough and maybe expanding in the layout, to actually have enough space to center the text? Can you show small runnable example? — Fenikso, Sep 03 '14 at 16:07

score 26 · Accepted Answer · answered Sep 03 '14 at 16:27

I think the problem may be that the label is centered, but it does not fill the space you think it does. You can verify by changing the label background color. The following example works for me on Windows 7:

import sys
from PyQt5.QtGui import *
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *

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

        self.label = QLabel("Test", self)
        self.label.setSizePolicy(QSizePolicy.Expanding, QSizePolicy.Expanding)
        self.label.setAlignment(Qt.AlignCenter)
        self.label.setStyleSheet("QLabel {background-color: red;}")

        self.button = QPushButton("Test", self)

        self.layout = QGridLayout()
        self.layout.addWidget(self.label, 0, 0)
        self.layout.addWidget(self.button, 0, 1)

        self.setLayout(self.layout)
        self.show()

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

score 8 · Answer 2 · edited Nov 20 '18 at 05:59

8

I had the same problem.

Try using:

Qt.Qt.AlignCenter.

edited Nov 20 '18 at 05:59

eyllanesc

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answered Oct 16 '15 at 19:58

91cobra

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score 8 · Answer 3 · answered Apr 26 '20 at 08:27

8

from PyQt5 import QtCore

# to center align a label 

self.your_label.setAlignment(QtCore.Qt.AlignCenter)

For more information, please follow the following StackOverflow thread: Qt has no attribute 'AlignCenter'

answered Apr 26 '20 at 08:27

Mujeeb Ishaque

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score 3 · Answer 4 · answered May 12 '17 at 00:47

3

The value of AlignCenter was defined at PyQt5.QtCore.Qt.AlignCenter, the other Align value was also define at QtCore.Qt. QtCore.Qt Module also contain core value such as keyboard value CTRL, SHIFT, ALT etc.

answered May 12 '17 at 00:47

Caching

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score 1 · Answer 5 · edited May 31 '18 at 19:58

1

I've got a workaround with HTML translating!

self.smallPWDisp.setText(_translate('Window', '<html><head/><body><p align=\'center\'>%s is your new password!</p></body></html>' % smallPassword))

edited May 31 '18 at 19:58

Félix Adriyel Gagnon-Grenier

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answered Sep 04 '14 at 06:09

Lachlan

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PyQt5: Center align a label

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