How to set QWidget background color?

python pyqt pyside
Johan Råde picture Johan Råde · Sep 29, 2012 · Viewed 60.2k times · Source

The line w.setBackgroundRole(QPalette.Base) in the code below has no effect. Why? How do I fix that?

import sys
from PySide.QtCore import *
from PySide.QtGui import *

app = QApplication(sys.argv)
w = QWidget()
w.setBackgroundRole(QPalette.Base)
w.show()
app.exec_()

Answer

jmk picture jmk · Sep 29, 2012

You need to call setAutoFillBackground(True) on the widget. By default, a QWidget doesn't fill its background.

For more information, see the documentation for the setAutoFillBackground property.

If you want to use an arbitrary background color, you need to modify the widget's palette instead:

p = w.palette()
p.setColor(w.backgroundRole(), Qt.red)
w.setPalette(p)

Related questions

PySide - PyQt : How to make set QTableWidget column width as proportion of the available space?

I'm developing a computer application with PySide and I'm using the QTableWidget. Let's say my table has 3 columns, but the data they contain is very different, like (for each row) a long sentence in the first column, then 3-digit numbers …

Read More
PyQt or PySide - which one to use

I started learning a bit of python and would now like to toy around a bit with gui-building. Qt seems to be a good choice because of its cross-platformishness. Now there seem to be two bindings available: PyQt by Riverbank …

Read More
PySide / PyQt detect if user trying to close window

is there a way to detect if user trying to close window? For example, in Tkinter we can do something like this: def exit_dialog(): #do stuff pass root = Tk() root.protocol("WM_DELETE_WINDOW", exit_dialog) root.mainloop() Thanks.

Read More