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crosshair.py
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crosshair.py
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import sys
import signal
from PyQt5.QtWidgets import QMainWindow, QApplication, QDesktopWidget
from PyQt5.QtGui import QPainter, QPen, QColor
from PyQt5.QtCore import Qt
# Handle Ctrl+C signal
signal.signal(signal.SIGINT, signal.SIG_DFL)
# Options
CROSSHAIR_SIZE = 4 # Size of the crosshair in pixels
CROSSHAIR_THICKNESS = 2 # Thickness of the crosshair lines in pixels
CROSSHAIR_COLOR = QColor(255, 0, 0) # Color of the crosshair (RGB)
class MainWindow(QMainWindow):
def __init__(self):
super(MainWindow, self).__init__()
self.main_window = MainWindow
self.setAttribute(Qt.WA_TranslucentBackground)
self.setWindowFlag(Qt.FramelessWindowHint)
self.setWindowFlag(Qt.WindowStaysOnTopHint) # Always on top
self.setWindowFlag(Qt.X11BypassWindowManagerHint) # Non-movable, non-resizable
self.setGeometry(*self.centerOnScreen(CROSSHAIR_SIZE, CROSSHAIR_SIZE))
@staticmethod
def centerOnScreen(width, height):
resolution = QDesktopWidget().screenGeometry()
return \
round(resolution.width() / 2) - round(width / 2), \
round(resolution.height() / 2) - round(height / 2), \
width, \
height
def paintEvent(self, event):
painter = QPainter(self)
painter.setPen(QPen(CROSSHAIR_COLOR, CROSSHAIR_THICKNESS)) # Set color and width
# Draw horizontal line
painter.drawLine(round(self.width() / 2), 0, round(self.width() / 2), self.height())
# Draw vertical line
painter.drawLine(0, round(self.height() / 2), self.width(), round(self.height() / 2))
if __name__ == '__main__':
app = QApplication(sys.argv)
mainWin = MainWindow()
mainWin.show()
sys.exit(app.exec_())