Python 为什么我继承的小部件的行为不像超类
请遵守以下代码Python 为什么我继承的小部件的行为不像超类,python,pyqt,pyqt5,Python,Pyqt,Pyqt5,请遵守以下代码 #!/usr/bin/env python3 from PyQt5 import QtWidgets as w class MyWidget(w.QWidget): pass app = w.QApplication([]) frame = w.QWidget() grid = w.QGridLayout() frame.setLayout(grid) w1 = MyWidget() w2 = w.QWidget() grid.addWidget(w1) grid.a
#!/usr/bin/env python3
from PyQt5 import QtWidgets as w
class MyWidget(w.QWidget): pass
app = w.QApplication([])
frame = w.QWidget()
grid = w.QGridLayout()
frame.setLayout(grid)
w1 = MyWidget()
w2 = w.QWidget()
grid.addWidget(w1)
grid.addWidget(w2)
w1.setStyleSheet("background-color: red")
w2.setStyleSheet("background-color: red")
frame.show()
app.exec_()
生成的应用程序不会生成两个相同的红色小部件。Qt文档意味着样式表之类的东西应该与子类小部件完美配合。这里怎么了
当它们在和中注释时,您必须覆盖继承类paintEvent():
#!/usr/bin/env python3
from PyQt5 import QtGui, QtWidgets
class MyWidget(QtWidgets.QWidget):
def paintEvent(self, event):
opt = QtWidgets.QStyleOption()
opt.initFrom(self)
p = QtGui.QPainter(self)
self.style().drawPrimitive(QtWidgets.QStyle.PE_Widget, opt, p, self)
if __name__ == '__main__':
import sys
app = QtWidgets.QApplication(sys.argv)
frame = QtWidgets.QWidget()
grid = QtWidgets.QGridLayout(frame)
for w in (MyWidget(), QtWidgets.QWidget()):
grid.addWidget(w)
w.setStyleSheet("background-color: red")
frame.resize(640, 480)
frame.show()
sys.exit(app.exec_())