Python 脚本不在 Ubuntu 上运行

Question

I have coded a Python 3 script on my Windows PC and want to have it on my Ubuntu PC as well. This script creates a PyQt5 Borderless window with Clickthrough enabled. The window should be transparent aside from a label that contains a single image, labeled GreenRGB.png. However, the PyQt5 Window doesn't show up. Why, and how can I fix this, if you please?

My Code

import sys

from PyQt5 import QtWidgets, QtCore
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QPixmap, QIcon
from PyQt5.QtWidgets import *


class Window(QMainWindow):
    def __init__(self):
        super().__init__()

        self.acceptDrops()
        # set the title
        self.setWindowTitle("RGB Corners")

        # creating label
        self.label = QLabel(self)

        # loading image
        self.pixmap = QPixmap('greenRGB.png')

        # adding image to label
        self.label.setPixmap(self.pixmap)

        # Optional, resize label to image size
        self.label.resize(self.pixmap.width(), self.pixmap.height())
        self.label.setAlignment(QtCore.Qt.AlignCenter)
        self.setWindowFlags(QtCore.Qt.Tool)
        self.setAttribute(Qt.WA_TranslucentBackground)
        self.setAttribute(Qt.WA_TransparentForMouseEvents, True)
        self.setAttribute(Qt.WA_NoChildEventsForParent, True)
        self.setWindowFlags(Qt.Window|Qt.X11BypassWindowManagerHint|Qt.WindowStaysOnTopHint|Qt.FramelessWindowHint|QtCore.Qt.Tool)

        # show all the widgets
        self.show()
        self.showMaximized()


App = QApplication(sys.argv)
window = Window()
windows = QtWidgets.QWidget()

trayIcon = QSystemTrayIcon(QIcon('test.png'), parent=App)
trayIcon.setToolTip('RGB Corners')
trayIcon.show()
trayMenu = QMenu()
exitAction = trayMenu.addAction('Exit')
exitAction.triggered.connect(App.quit)
trayIcon.setContextMenu(trayMenu)

sys.exit(App.exec())

PyQt5.12.8 is the version that I have installed. After further inspection, the window is created, and apparently shown. No bugs in PyCharm, and the program does not crash. I suppose that Ubuntu could not be drawing these correctly. The theme that I have installed has no troubles, as the default Yaru themes have the same issue. After further inspection, the line that caused it not to show is this: self.setWindowFlags(QtCore.Qt.Tool) .

Answer 1

I am so sorry for all of your troubles. The bug was in the line self.setWindowFlags(QtCore.Qt.Tool) I do not know why this broke it, but I commented it (will delete it) and it got fixed. However, upon doing this, the label will not resize properly, and is always too small. I guess that is for another question though.