首先,我是一位经验丰富的C程序员,但对python来说是新手。我想使用pyqt在python中创建一个简单的应用程序。让我们想象一下这个应用程序就像它运行时一样简单,它必须在系统托盘中放置一个图标,它在菜单中提供了一个退出应用程序的选项。
此代码有效,它显示菜单(我没有连接退出操作等等以保持简单)
import sys
from PyQt4 import QtGui
def main():
app = QtGui.QApplication(sys.argv)
trayIcon = QtGui.QSystemTrayIcon(QtGui.QIcon("Bomb.xpm"), app)
menu = QtGui.QMenu()
exitAction = menu.addAction("Exit")
trayIcon.setContextMenu(menu)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
但这不是:
import sys
from PyQt4 import QtGui
class SystemTrayIcon(QtGui.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtGui.QSystemTrayIcon.__init__(self, icon, parent)
menu = QtGui.QMenu()
exitAction = menu.addAction("Exit")
self.setContextMenu(menu)
def main():
app = QtGui.QApplication(sys.argv)
trayIcon = SystemTrayIcon(QtGui.QIcon("Bomb.xpm"), app)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
我可能会错过一些东西。没有错误,但在第二种情况下,当我点击右键时它没有显示菜单。
答案 0 :(得分:29)
好吧,经过一些调试我发现了问题。 QMenu对象在完成__init__
函数后被销毁,因为它没有父级。虽然QSystemTrayIcon的父级可以是QMenu的对象,但它必须是Qwidget。此代码有效(请参阅QMenu如何获得与QSystemTrayIcon相同的父级,这是QWidget):
import sys
from PyQt4 import QtGui
class SystemTrayIcon(QtGui.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtGui.QSystemTrayIcon.__init__(self, icon, parent)
menu = QtGui.QMenu(parent)
exitAction = menu.addAction("Exit")
self.setContextMenu(menu)
def main():
app = QtGui.QApplication(sys.argv)
w = QtGui.QWidget()
trayIcon = SystemTrayIcon(QtGui.QIcon("Bomb.xpm"), w)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 1 :(得分:8)
我认为我更喜欢以下内容,因为它似乎并不依赖于QT的内部垃圾收集决策。
import sys
from PyQt4 import QtGui
class SystemTrayIcon(QtGui.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtGui.QSystemTrayIcon.__init__(self, icon, parent)
self.menu = QtGui.QMenu(parent)
exitAction = self.menu.addAction("Exit")
self.setContextMenu(self.menu)
def main():
app = QtGui.QApplication(sys.argv)
style = app.style()
icon = QtGui.QIcon(style.standardPixmap(QtGui.QStyle.SP_FileIcon))
trayIcon = SystemTrayIcon(icon)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 2 :(得分:5)
以下是实施退出操作的代码
import sys
from PyQt4 import QtGui, QtCore
class SystemTrayIcon(QtGui.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtGui.QSystemTrayIcon.__init__(self, icon, parent)
menu = QtGui.QMenu(parent)
exitAction = menu.addAction("Exit")
self.setContextMenu(menu)
QtCore.QObject.connect(exitAction,QtCore.SIGNAL('triggered()'), self.exit)
def exit(self):
QtCore.QCoreApplication.exit()
def main():
app = QtGui.QApplication(sys.argv)
w = QtGui.QWidget()
trayIcon = SystemTrayIcon(QtGui.QIcon("qtLogo.png"), w)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
main()
答案 3 :(得分:4)
这是PyQt5版本(能够实现demosthenes的回答)。 Source用于从PyQt4移植到PyQt5
import sys
from PyQt5 import QtCore, QtGui, QtWidgets
# code source: https://stackoverflow.com/questions/893984/pyqt-show-menu-in-a-system-tray-application - add answer PyQt5
#PyQt4 to PyQt5 version: https://stackoverflow.com/questions/20749819/pyqt5-failing-import-of-qtgui
class SystemTrayIcon(QtWidgets.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtWidgets.QSystemTrayIcon.__init__(self, icon, parent)
menu = QtWidgets.QMenu(parent)
exitAction = menu.addAction("Exit")
self.setContextMenu(menu)
def main(image):
app = QtWidgets.QApplication(sys.argv)
w = QtWidgets.QWidget()
trayIcon = SystemTrayIcon(QtGui.QIcon(image), w)
trayIcon.show()
sys.exit(app.exec_())
if __name__ == '__main__':
on=r''# ADD PATH OF YOUR ICON HERE .png works
main(on)
答案 4 :(得分:1)
使用pyqt5连接事件:
class SystemTrayIcon(QtWidgets.QSystemTrayIcon):
def __init__(self, icon, parent=None):
QtWidgets.QSystemTrayIcon.__init__(self, icon, parent)
menu = QtWidgets.QMenu(parent)
exitAction = menu.addAction("Exit")
self.setContextMenu(menu)
menu.triggered.connect(self.exit)
def exit(self):
QtCore.QCoreApplication.exit()
答案 5 :(得分:1)
我无法在PyQt5中获得上述任何答案(系统托盘菜单中的退出,实际上不会退出),但我设法将它们组合起来以找到有效的解决方案。我还在尝试确定是否应该以某种方式进一步使用exitAction。
String navigationUrl = "http://maps.google.com/maps?saddr=latitude,longitude&daddr=latitude,longitude";
Intent navIntent = new Intent(Intent.ACTION_VIEW, Uri.parse(navigationUrl));
startActivity(navIntent);