pyqt5 設定視窗背景

通過qss可以設定視窗的背景色或背景。

import sys

from pyqt5.qtcore import
*from pyqt5.qtgui import
*from pyqt5.qtwidgets import
*class
mainwindow
(qwidget)
:def
__init__
(self, parent=
none):
super()
.__init__(parent)
self.setobjectname(
"mainwindow"
)        qss =
"qwidget#mainwindow"
# qss = "qwidget#mainwindow"
self.setstylesheet(qss)
if __name__ ==
"__main__"
:    window = mainwindow(
)    window.show())
)

import sys

from pyqt5.qtcore import
*from pyqt5.qtgui import
*from pyqt5.qtwidgets import
*class
mainwindow
(qwidget)
:def
__init__
(self, parent=
none):
super()
.__init__(parent)
palette = qpalette(
)        palette.setcolor(qpalette.background, qt.black)
self.setpalette(palette)
if __name__ ==
"__main__"
:    window = mainwindow(
)    window.show())
)

import sys

from pyqt5.qtcore import *

from pyqt5.qtgui import *

from pyqt5.qtwidgets import *

class mainwindow(qwidget):

def __init__(self, parent=none):

super().__init__(parent)
palette = qpalette()
palette.setbrush(qpalette.background, qbrush(qpixmap("background.png")))
self.setpalette(palette)

在paintevent函式內部繪製背景色：

import sys

from pyqt5.qtcore import
*from pyqt5.qtgui import
*from pyqt5.qtwidgets import
*class
mainwindow
(qwidget)
:def
__init__
(self, parent=
none):
super()
.__init__(parent)
self.setwindowtitle(
"mainwindow"
)def
paintevent
(self, event)
:        painter = qpainter(self)
painter.setbrush(qt.black)
painter.drawrect(self.rect())
if __name__ ==
"__main__"
:    window = mainwindow(
)    window.show())
)

import sys

from pyqt5.qtcore import
*from pyqt5.qtgui import
*from pyqt5.qtwidgets import
*class
mainwindow
(qwidget)
:def
__init__
(self, parent=
none):
super()
.__init__(parent)
self.setwindowtitle(
"mainwindow"
)def
paintevent
(self, event)
:        painter = qpainter(self)
pixmap = qpixmap(
"background.png"
)        painter.drawpixmap(self.rect(
), pixmap)
if __name__ ==
"__main__"
:    window = mainwindow(
)    window.show())
)

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