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[英]How can I use a push button to change between two menu bars in PyQt5? The menu bar disappears
[英]How do I change the color of the text in a menu bar item in PyQt5?
假设我有一个带有菜单栏的GUI。
mainMenu = self.menuBar()
mainMenu.setStyleSheet("""QMenuBar { background-color: rgb(45, 45, 48); }""") #Set the background color of the menu bar to black.
testMenu = mainMenu.addMenu('Test') # I want to change the color of this text.
test_dropButton = QAction('Test', self)
test_dropButton = setShortcut('Ctrl+T')
test_dropButton.triggered.connect(self.close)
testMenu.addActtion(test_dropButton)#add button to drop down menu.
如何更改单个菜单QAction按钮的文本颜色? 我会通过添加到样式表中调用QAction::item rgb(r, g, b)
来做到这一点,还是有一种更有效的方法?
试试吧:
import sys
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
qss = """
QMenuBar {
background-color: qlineargradient(x1:0, y1:0, x2:0, y2:1,
stop:0 lightgray, stop:1 darkgray);
}
QMenuBar::item {
spacing: 3px;
padding: 2px 10px;
background-color: rgb(210,105,30);
color: rgb(255,255,255);
border-radius: 5px;
}
QMenuBar::item:selected {
background-color: rgb(244,164,96);
}
QMenuBar::item:pressed {
background: rgb(128,0,0);
}
/* +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
QMenu {
background-color: #ABABAB;
border: 1px solid black;
margin: 2px;
}
QMenu::item {
background-color: transparent;
}
QMenu::item:selected {
background-color: #654321;
color: rgb(255,255,255);
}
"""
class Example(QMainWindow):
def __init__(self):
super().__init__()
self.initUI()
### vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv
mainMenu = self.menuBar()
testMenu = mainMenu.addMenu('mainMenu')
test1_dropButton = QAction('Test 1', self)
testMenu.addAction(test1_dropButton)
test2_dropButton = QAction('Test 2', self)
test2_dropButton.triggered.connect(self.displayImage)
testMenu.addAction(test2_dropButton)
test_dropButton = QAction('Exit', self)
test_dropButton.setShortcut('Ctrl+E')
test_dropButton.triggered.connect(self.close)
testMenu.addAction(test_dropButton)
### ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
def initUI(self):
central_widget = QWidget()
self.setCentralWidget(central_widget)
self.layV = QVBoxLayout(central_widget)
def displayImage(self):
pixmap = QPixmap("D:/_Qt/img/pyqt.jpg")
lbl = QLabel(self)
self.layV.addWidget(lbl)
lbl.setPixmap(pixmap.scaled(400, 400, Qt.KeepAspectRatio))
if __name__ == '__main__':
app = QApplication([])
app.setStyleSheet(qss) # <--------------------------------
ex = Example()
ex.setWindowTitle('Style Sheet: QMenuBar, QMenu')
ex.setWindowIcon(QIcon('D:/_Qt/img/py-qt.png'))
ex.resize(420,440)
ex.show()
sys.exit(app.exec_())
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